[chore] update version number to 15 2 snapshot

* Fix #894: Replaced help text for flip &rotated tool-flip icon

* Undo changes to icons.

.eslintignore

@@ -0,0 +1,2 @@
+# Exclude libs.
+**/lib/**/*.js

.gitignore

@@ -1,4 +1,4 @@
-# mac artefacts
+# mac artifacts
 *.DS_Store
 
 # nodejs local installs
@@ -15,10 +15,12 @@ cache
 # netbeans project folder
 nbproject
 
+# vscode workspace folder
+.vscode
+
 # git stackdumps
 *.stackdump
 
-
 # diffs
 diff.txt
 

.jscsrc

@@ -1,75 +0,0 @@
-{
-    "requireCurlyBraces": [
-        "if",
-        "else",
-        "for",
-        "while",
-        "do",
-        "try",
-        "catch"
-    ],
-    "requireOperatorBeforeLineBreak": true,
-    "requireCamelCaseOrUpperCaseIdentifiers": true,
-    "maximumLineLength": {
-      "value": 80,
-      "allExcept": ["comments", "regex"]
-    },
-    "validateIndentation": 2,
-    "validateQuoteMarks": "'",
-
-    "disallowMultipleLineStrings": true,
-    "disallowMixedSpacesAndTabs": true,
-    "disallowTrailingWhitespace": true,
-    "disallowSpaceAfterPrefixUnaryOperators": true,
-    "disallowMultipleVarDecl": true,
-    "disallowKeywordsOnNewLine": ["else"],
-
-    "requireSpaceAfterKeywords": [
-      "if",
-      "else",
-      "for",
-      "while",
-      "do",
-      "switch",
-      "return",
-      "try",
-      "catch"
-    ],
-    "requireSpaceBeforeBinaryOperators": [
-        "=", "+=", "-=", "*=", "/=", "%=", "<<=", ">>=", ">>>=",
-        "&=", "|=", "^=", "+=",
-
-        "+", "-", "*", "/", "%", "<<", ">>", ">>>", "&",
-        "|", "^", "&&", "||", "===", "==", ">=",
-        "<=", "<", ">", "!=", "!=="
-    ],
-    "requireSpaceAfterBinaryOperators": true,
-    "requireSpacesInConditionalExpression": true,
-    "requireSpaceBeforeBlockStatements": true,
-    "requireSpacesInForStatement": true,
-    "requireLineFeedAtFileEnd": true,
-    "requireSpacesInFunctionExpression": {
-        "beforeOpeningCurlyBrace": true
-    },
-    "disallowSpacesInAnonymousFunctionExpression": {
-        "beforeOpeningRoundBrace": false
-    },
-    "disallowSpacesInsideObjectBrackets": "all",
-    "disallowSpacesInsideArrayBrackets": "all",
-    "disallowSpacesInsideParentheses": true,
-
-    "disallowMultipleLineBreaks": true,
-    "disallowNewlineBeforeBlockStatements": true,
-    "disallowKeywords": ["with"],
-    "disallowSpacesInFunctionExpression": null,
-    "disallowSpacesInFunctionDeclaration": null,
-    "disallowSpacesInCallExpression": true,
-    "disallowSpaceAfterObjectKeys": false,
-    "requireSpaceBeforeObjectValues": true,
-    "requireCapitalizedConstructors": true,
-    "requireDotNotation": true,
-    "requireSemicolons": true,
-    "validateParameterSeparator": ", ",
-
-    "jsDoc": null
-}

.travis.yml

@@ -1,14 +1,9 @@
 language: node_js
 node_js:
-  - "4.1"
+  - "7.4.0"
 before_install:
   - npm update -g npm
   - npm install -g grunt-cli
-  - git clone git://github.com/n1k0/casperjs.git ~/casperjs
-  - cd ~/casperjs
-  - git checkout tags/1.1.3
-  - export PATH=$PATH:`pwd`/bin
-  - cd -
 before_script:
   - phantomjs --version
   - casperjs --version

Gruntfile.js

@@ -47,16 +47,13 @@ module.exports = function(grunt) {
   var integrationTestPaths = require('./test/casperjs/integration/IntegrationSuite.js').tests;
   var integrationTests = prefixPaths(integrationTestPaths, "test/casperjs/integration/");
 
-  var getConnectConfig = function (base, port, host) {
-    if (typeof base === 'string') {
-      base = [base];
-    }
-
+  var getConnectConfig = function (base, port, host, open) {
     return {
       options: {
         port: port,
         hostname : host,
-        base: base
+        base: base,
+        open: open
       }
     };
   };
@@ -83,35 +80,17 @@ module.exports = function(grunt) {
       css : ['src/css/**/*.css']
     },
 
-    jscs : {
-      options : {
-        "config": ".jscsrc",
-        "maximumLineLength": 120,
-        "requireCamelCaseOrUpperCaseIdentifiers": "ignoreProperties",
-        "validateQuoteMarks": { "mark": "'", "escape": true },
-        "disallowMultipleVarDecl": "exceptUndefined",
-        "disallowSpacesInAnonymousFunctionExpression": null
-      },
-      js : [ 'src/js/**/*.js' , '!src/js/**/lib/**/*.js' ]
-    },
-
-    jshint: {
-      options: {
-        undef : true,
-        latedef : true,
-        browser : true,
-        trailing : true,
-        curly : true,
-        globals : {'$':true, 'jQuery' : true, 'pskl':true, 'Events':true, 'Constants':true, 'console' : true, 'module':true, 'require':true, 'Q':true, 'Promise': true}
-      },
+    eslint: {
       files: [
         // Includes
-        'Gruntfile.js',
-        'package.json',
         'src/js/**/*.js',
-        // Excludes
+        // Exludes
+        // TODO: remove this (for now we still get warnings from the lib folder)
         '!src/js/**/lib/**/*.js'
-      ]
+      ],
+      options: {
+        fix: grunt.option('fix') // this will get params from the flags
+      }
     },
 
     /**
@@ -119,18 +98,9 @@ module.exports = function(grunt) {
      */
 
     connect: {
-      prod: getConnectConfig('dest/prod', PORT.PROD, hostname),
-      test: getConnectConfig(['dest/dev', 'test'], PORT.TEST, hostname),
-      dev: getConnectConfig(['dest/dev', 'test'], PORT.DEV, hostname)
-    },
-
-    open : {
-      prod : {
-        path : 'http://' + hostname + ':' + PORT.PROD + '/'
-      },
-      dev : {
-        path : 'http://' + hostname + ':' + PORT.DEV + '/?debug'
-      }
+      prod: getConnectConfig('dest/prod', PORT.PROD, hostname, true),
+      test: getConnectConfig(['dest/dev', 'test'], PORT.TEST, hostname, false),
+      dev: getConnectConfig(['dest/dev', 'test'], PORT.DEV, hostname, 'http://' + hostname + ':' + PORT.DEV + '/?debug')
     },
 
     watch: {
@@ -238,20 +208,6 @@ module.exports = function(grunt) {
           src: ['dest/tmp/css/piskel-style-packaged' + version + '.css'],
           dest: 'dest/prod/css/piskel-style-packaged' + version + '.css'
         }]
-      },
-      // remove the fake header from the desktop build
-      desktop: {
-        options: {
-          patterns: [{
-              match: /<!--standalone-start-->(?:.|[\r\n])*<!--standalone-end-->/,
-              replacement: "",
-              description : "Remove everything between standalone-start & standalone-end"
-            }
-          ]
-        },
-        files: [
-          {src: ['dest/prod/index.html'], dest: 'dest/prod/index.html'}
-        ]
       }
     },
 
@@ -351,11 +307,13 @@ module.exports = function(grunt) {
 
   // TEST TASKS
   // Run linting
-  grunt.registerTask('lint', ['jscs:js', 'leadingIndent:css', 'jshint']);
+  grunt.registerTask('lint', ['eslint', 'leadingIndent:css']);
   // Run unit-tests
   grunt.registerTask('unit-test', ['karma']);
   // Run integration tests
   grunt.registerTask('integration-test', ['build-dev', 'connect:test', 'casperjs:integration']);
+  // Run drawing tests
+  grunt.registerTask('drawing-test', ['build-dev', 'connect:test', 'casperjs:drawing']);
   // Run linting, unit tests, drawing tests and integration tests
   grunt.registerTask('test', ['lint', 'unit-test', 'build-dev', 'connect:test', 'casperjs:drawing', 'casperjs:integration']);
 
@@ -370,15 +328,15 @@ module.exports = function(grunt) {
   grunt.registerTask('merge-statics', ['concat:js', 'concat:css', 'uglify']);
   grunt.registerTask('build',  ['clean:prod', 'sprite', 'merge-statics', 'build-index.html', 'replace:mainPartial', 'replace:css', 'copy:prod']);
   grunt.registerTask('build-dev',  ['clean:dev', 'sprite', 'build-index.html', 'copy:dev']);
-  grunt.registerTask('desktop', ['clean:desktop', 'default', 'replace:desktop', 'nwjs:windows']);
-  grunt.registerTask('desktop-mac', ['clean:desktop', 'default', 'replace:desktop', 'nwjs:macos']);
+  grunt.registerTask('desktop', ['clean:desktop', 'default', 'nwjs:windows']);
+  grunt.registerTask('desktop-mac', ['clean:desktop', 'default', 'nwjs:macos']);
   grunt.registerTask('desktop-mac-old', ['clean:desktop', 'default', 'replace:desktop', 'nwjs:macos_old']);
 
   // SERVER TASKS
   // Start webserver and watch for changes
-  grunt.registerTask('serve', ['build', 'connect:prod', 'open:prod', 'watch:prod']);
+  grunt.registerTask('serve', ['build', 'connect:prod', 'watch:prod']);
   // Start webserver on src folder, in debug mode
-  grunt.registerTask('play', ['build-dev', 'connect:dev', 'open:dev', 'watch:dev']);
+  grunt.registerTask('play', ['build-dev', 'connect:dev', 'watch:dev']);
 
   // ALIASES, kept for backward compatibility
   grunt.registerTask('serve-debug', ['play']);

README.md

@@ -1,75 +1,61 @@
 Piskel
 ======
 
-[![Travis Status](https://api.travis-ci.org/juliandescottes/piskel.png?branch=master)](https://travis-ci.org/juliandescottes/piskel) [![Built with Grunt](https://cdn.gruntjs.com/builtwith.png)](http://gruntjs.com/)
+[![Travis Status](https://api.travis-ci.org/piskelapp/piskel.png?branch=master)](https://travis-ci.org/piskelapp/piskel) [![Built with Grunt](https://cdn.gruntjs.com/builtwith.png)](https://gruntjs.com/)
 
-A simple web-based tool for Spriting and Pixel art.
+Piskel is an easy-to-use sprite editor. It can be used to create game sprites, animations, pixel-art...
+It is the editor used in **[piskelapp.com](https://www.piskelapp.com)**.
 
-![Piskel editor screenshot](https://screenletstore.appspot.com/img/8f03e768-ac59-11e3-b2a1-7f5a1b97c420.jpeg "Piskel editor screenshot")
+<img
+  src="https://screenletstore.appspot.com/img/95aaa0f0-37a4-11e7-a652-7b8128ce3e3b.png"
+  title="Piskel editor screenshot"
+  width="500">
 
-You can try the standalone editor at **http://juliandescottes.github.io/piskel** or see it integrated in **http://piskelapp.com**.
+## About Piskel
 
-Piskel is mainly developped by :
+### Built with
 
-* **[@juliandescottes](https://github.com/juliandescottes)**
-* **[@grosbouddha](https://github.com/grosbouddha)**
-
-## What's the point ?
-
-You can use Piskel to do two things :
-* **spriting** : create retro-style sprites for games
-
-![Megaman spritesheet](http://piskel-imgstore-a.appspot.com/img/c8081287-ac58-11e3-bd8c-b3c4036c0eee.png "Megaman spritesheet")
-
-* **pixelart** : create crazy/pretty pixelart animations for fun !
-
-![Rabbit jumping](http://piskel-imgstore-a.appspot.com/img/947f2dab-ac58-11e3-949a-b3c4036c0eee.gif "Rabit jumping")
-
-Integrated in **[piskelapp.com](http://piskelapp.com)**, you can share everything you work on with others as easily as you share a link.
-
-## Requirements
-
-Piskel supports the following browsers :
-* **Chrome** (latest)
-* **Firefox** (latest)
-* **Internet Explorer** 11+
-
-... and a fairly recent computer.
-
-We don't plan/want/could be forced into supporting older IEs. For Opera and Safari, we've never tested them but the gap shouldn't be huge.
-
-## Offline version
-
-Offline builds are available. More details in the [dedicated wiki page](https://github.com/juliandescottes/piskel/wiki/Desktop-applications).
-
-## Built with
-
-The Piskel editor is purely built in **JavaScript, HTML and CSS**. It uses Canvas extensively for displaying all them pretty sprites.
+The Piskel editor is purely built in **JavaScript, HTML and CSS**.
 
 We also use the following **libraries** :
 * [spectrum](https://github.com/bgrins/spectrum) : awesome standalone colorpicker
-* [gifjs](http://jnordberg.github.io/gif.js/) : generate animated GIFs in javascript, using webworkers
+* [gifjs](https://jnordberg.github.io/gif.js/) : generate animated GIFs in javascript, using webworkers
 * [supergif](https://github.com/buzzfeed/libgif-js) : modified version of SuperGif to parse and import GIFs
 * [jszip](https://github.com/Stuk/jszip) : create, read and edit .zip files with Javascript
 * [canvas-toBlob](https://github.com/eligrey/canvas-toBlob.js/) : shim for canvas toBlob
-* [jquery](http://jquery.com/) : used sporadically in the application
-* [bootstrap-tooltip](http://getbootstrap.com/javascript/#tooltips) : nice tooltips
+* [jquery](https://jquery.com/) : used sporadically in the application
+* [bootstrap-tooltip](https://getbootstrap.com/javascript/#tooltips) : nice tooltips
 
-As well as some **icons** from the [Noun Project](http://thenounproject.com/) :
+As well as some **icons** from the [Noun Project](https://thenounproject.com/) :
 * Folder by Simple Icons from The Noun Project
 * (and probably one or two others)
 
+### Browser Support
+
+Piskel supports the following browsers:
+* **Chrome** (latest)
+* **Firefox** (latest)
+* **Edge** (latest)
+* **Internet Explorer** 11
+
+### Mobile/Tablets
+
+There is no support for mobile.
+
+### Offline builds
+
+Offline builds are available. More details in the [dedicated wiki page](https://github.com/piskelapp/piskel/wiki/Desktop-applications).
 
 ## Contributing ?
 
 Help is always welcome !
 
-* **Issues** : Found a problem when using the application, want to request a feature, [open an issue](https://github.com/juliandescottes/piskel/issues).
-* **Participate** : Have a look at the [wiki](https://github.com/juliandescottes/piskel/wiki) to set up the development environment
+* **Issues** : Found a problem when using the application, want to request a feature, [open an issue](https://github.com/piskelapp/piskel/issues).
+* **Development** : Have a look at the [wiki](https://github.com/piskelapp/piskel/wiki) to set up the development environment
 
 ## License
 
-Copyright 2016 Julian Descottes
+Copyright 2017 Julian Descottes
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -83,7 +69,3 @@ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 
-## Mobile/Tablets
-
-There is no support for mobile for now.
-

RELEASE.md

@@ -0,0 +1,32 @@
+# Release instructions
+
+- retrieve source code and dependencies
+  - clone piskel `git clone https://github.com/piskelapp/piskel`
+  - clone piskel website `git clone https://github.com/piskelapp/piskel-website`
+  - download the appengine SDK for python at [this url](https://cloud.google.com/appengine/docs/standard/python/download). It seems recent versions don't work for me on Windows. [GoogleAppEngine-1.9.67.msi](https://storage.cloud.google.com/appengine-sdks/featured/GoogleAppEngine-1.9.67.msi?_ga=2.6838962.-1257793585.1543157659) looks ok...
+- prepare the release
+  - in `piskel-website` clone, checkout the `master` branch, not the `release`. The release branch is similar to the master branch, except it doesn't ignore the statics files coming from the `piskel` project. The idea is that we can easily checkout the release branch to do a new release, without having to rebuild piskel, in case nothing changed in piskel itself. We will switch to the release branch when we perform the final release.
+  - in `piskel` clone, create a new branch for the release `git checkout -b vX.Y`
+  - build and copy piskel to piskel-website (assumes the clones are in the same folder) `grunt && node bin/copy-to-piskel-website.js`
+- local test
+  - start piskel-website in the Google app engine launcher, test manually the update
+  - if any issue is detected create a commit to fix it (on the `vX.Y` branch) and push it.
+
+- beta test
+  - check the version in app.yaml is set to 'beta'. For historical reasons, alpha is the "production" version, while beta is the ... beta version. Don't ask.
+  - in the google app engine launcher, deploy this version.
+  - go to https://beta-dot-piskel-app.appspot.com and test (while this is not production frontend, it shares the same database, so be careful with what you create and delete)
+  - if any issue is detected create a commit to fix it (on `master`) and push it.
+- check caches...
+  - If any icon was modified or any script of piskel-website was modified, there's no nice way to clean the cache on each release... so we just put a time stamp in the requests. eg `background-image: url(../img/icons@2x.png?20181125);` or `<script type="text/javascript" src="/static/js/piskel-animated-preview.js?20181124"></script>`. Erk.
+- finalize the release
+  - in `piskel` update version in package.json. Remove the "-SNAPSHOT" at the end and commit the change, with a commit message such as `release: bump version to vX.Y`.
+  - in `piskel-website` checkout the `release` branch. Rebase it on master (that's pretty bad, we should probably cherry pick all the changes between the two branches...)
+  - once again build and copy piskel to piskel-website
+  - in `piskel-website` run `git status` to check that there are a bunch of changes to commit. (test locally again if you are paranoid)
+  - in `piskel-website` commit the current changes with a commit message such as `update statics for release vX.Y`
+  - Check that the version in app.yaml is now set to alpha. Deploy. Pray.
+- post release
+  - in piskel-website push the release branch to github
+  - in piskel add a last commit to update the version in package.json to update the version to `vX+1.0-SNAPSHOT`
+  - create a tag on github

bin/copy-to-piskel-website.js

@@ -17,7 +17,16 @@ function onCopy(err) {
 
   console.log('Copied static files to piskel-website...');
   let previousPartialPath = path.resolve(PISKELAPP_PATH, 'templates/editor/main-partial.html');
-  fs.unlink(previousPartialPath, onDeletePreviousPartial);
+  fs.access(previousPartialPath, fs.constants.F_OK, function (err) {
+    if (err) {
+      // File does not exit, call next step directly.
+      console.error('Previous main partial doesn\'t exist yet.');
+      onDeletePreviousPartial();
+    } else {
+      // File exists, try to delete it before moving on.
+      fs.unlink(previousPartialPath, onDeletePreviousPartial);
+    }
+  })
 }
 
 function onDeletePreviousPartial(err) {

cli/README.md

@@ -0,0 +1,64 @@
+# Piskel CLI
+
+Wraps the Piskel pixel editing application to enable similar export options via the command line.
+
+## Installation
+
+Option 1: Globally install Piskel
+```
+npm install -g https://github.com/piskelapp/piskel/tarball/master
+```
+
+Option 2: Clone and install Piskel normally and then run npm link inside the installation root
+
+## Usage
+
+**Export provided .piskel file as a png sprite sheet using app defaults**
+```
+piskel-cli snow-monster.piskel
+```
+
+**Export scaled sprite sheet**
+```
+piskel-cli snow-monster.piskel --scale 5
+```
+
+**Export scaled to specific (single frame) width value**
+```
+piskel-cli snow-monster.piskel --scaledWidth 435
+```
+
+**Export scaled to specific (single frame) height value**
+```
+piskel-cli snow-monster.piskel --scaledHeight 435
+```
+
+**Export sprite sheet as a single column**
+```
+piskel-cli snow-monster.piskel --columns 1
+```
+
+**Export sprite sheet as a single row**
+```
+piskel-cli snow-monster.piskel --rows 1
+```
+
+**Export a single frame (0 is first frame)**
+```
+piskel-cli snow-monster.piskel --frame 3
+```
+
+**Export a second file containing the data-uri for the exported png**
+```
+piskel-cli snow-monster.piskel --dataUri
+```
+
+**Export cropped**
+```
+piskel-cli snow-monster.piskel --crop
+```
+
+**Custom output path and/or filename**
+```
+piskel-cli snow-monster.piskel --dest ./output-folder/snah-monstah.png
+```

cli/export-png.js

@@ -0,0 +1,130 @@
+const fs = require('fs');
+
+function onPageEvaluate(window, options, piskel) {
+    console.log("\nPiskel name: " + piskel.descriptor.name);
+
+    // Setup piskelController
+    var piskelController = new pskl.controller.piskel.PiskelController(piskel);
+
+    pskl.app.piskelController = piskelController;
+
+    piskelController.init();
+
+    // Apply crop if enabled
+    if (options.crop) {
+        // Mock selection manager to avoid errors during crop
+        pskl.app.selectionManager = {};
+
+        // Setup crop tool
+        var crop = new pskl.tools.transform.Crop();
+
+        // Perform crop
+        crop.applyTransformation();
+
+        // Get cropped piskel
+        piskel = piskelController.getPiskel();
+    }
+
+    // Mock exportController to provide zoom value based on cli args
+    // and to avoid errors and/or unnecessary bootstrapping
+    var exportController = {
+        getExportZoom: function () {
+            var zoom = options.zoom;
+
+            if (options.scaledWidth) {
+                zoom = options.scaledWidth / piskel.getWidth();
+            } else if (options.scaledHeight) {
+                zoom = options.scaledHeight / piskel.getHeight();
+            }
+
+            return zoom;
+        }
+    };
+
+    // Setup pngExportController
+    var pngExportController = new pskl.controller.settings.exportimage.PngExportController(piskelController, exportController);
+
+    // Mock getColumns and getRows to use values from cli arguments
+    pngExportController.getColumns_ = function () {
+        if (options.columns) return options.columns;
+
+        if (options.rows) {
+            return Math.ceil(piskelController.getFrameCount() / pngExportController.getRows_());
+        } else {
+            return pngExportController.getBestFit_();
+        }
+    };
+
+    pngExportController.getRows_ = function () {
+        if (options.columns && !options.rows) {
+            return Math.ceil(piskelController.getFrameCount() / pngExportController.getColumns_());
+        }
+
+        return options.rows;
+    };
+
+    // Render to output canvas
+    var canvas;
+
+    if (options.frame > -1) {
+        // Render a single frame
+        canvas = piskelController.renderFrameAt(options.frame, true);
+
+        var zoom = exportController.getExportZoom();
+
+        if (zoom != 1) {
+            // Scale rendered frame
+            canvas = pskl.utils.ImageResizer.resize(canvas, canvas.width * zoom, canvas.height * zoom, false);
+        }
+    } else {
+        // Render the sprite sheet
+        canvas = pngExportController.createPngSpritesheet_();
+    }
+
+    // Add output canvas to DOM
+    window.document.body.appendChild(canvas);
+
+    // Prepare return data
+    const returnData = {
+        width: canvas.width,
+        height: canvas.height
+    };
+
+    // Wait a tick for things to wrap up
+    setTimeout(function ()  {
+        // Exit and pass data to parent process
+        window.callPhantom(returnData);
+    }, 0);
+}
+
+function onPageExit(page, options, data) {
+    // Set clip for output image
+    if (data.width && data.height) {
+        page.clipRect = { top: 0, left: 0, width: data.width, height: data.height };
+    }
+
+    console.log("\n" + 'Generated file(s):');
+
+    const dest = options.dest.replace('.png', '') + '.png';
+
+    // Render page to the output image
+    page.render(dest);
+
+    console.log(" " + dest);
+
+    if (options.dataUri) {
+        const dataUriPath = options.dest + '.datauri';
+
+        const dataUri = 'data:image/png;base64,' + page.renderBase64('PNG');
+
+        // Write data-uri to file
+        fs.write(dataUriPath, dataUri, 'w');
+
+        console.log(" " + dataUriPath);
+    }
+}
+
+module.exports = {
+    onPageEvaluate: onPageEvaluate,
+    onPageExit: onPageExit
+};

cli/index.js

@@ -0,0 +1,93 @@
+#!/usr/bin/env node
+
+const fs = require('fs');
+const path = require('path');
+const minimist = require('minimist');
+const childProcess = require('child_process');
+const phantomjs = require('phantomjs');
+const binPath = phantomjs.path;
+
+// Parse command args
+let args = minimist(process.argv.slice(2), {
+  default: {
+    crop: false,
+    dataUri: false,
+    debug: false,
+    scale: 1
+  },
+});
+
+if (args.debug) console.log(args);
+
+// Ensure a path for the src file was passed
+if (!args._ || (args._ && !args._.length)) {
+  console.error('Path to a .piskel file is required');
+
+  return;
+}
+
+const src = args._[0];
+
+// Ensure the src file exists
+if (!fs.existsSync(src)) {
+  console.error('No such file: ' + src);
+
+  return;
+}
+
+// Read src piskel file
+const piskelFile = fs.readFileSync(src, 'utf-8');
+
+const dest = args.dest || path.basename(src, '.piskel');
+
+console.log('Piskel CLI is exporting...');
+
+// Get path to Piskel's app js bundle
+let piskelAppJsDir = path.resolve(__dirname +'/../dest/prod/js/');
+let minJsFiles = fs.readdirSync(piskelAppJsDir).filter(filename => filename.indexOf('min') > -1);
+let piskelAppJsFileName = minJsFiles[0];
+let piskelAppJsPath = (piskelAppJsFileName) ? path.join(piskelAppJsDir, piskelAppJsFileName) : '';
+
+if (!fs.existsSync(piskelAppJsPath)) {
+  console.error(`Piskel's application JS file not found in: ${piskelAppJsDir}. Run prod build and try again.`);
+
+  return;
+}
+
+// Prepare args to pass to phantom script
+const options = {
+  dest: dest,
+  zoom: args.scale,
+  crop: !!args.crop,
+  rows: args.rows,
+  columns: args.columns,
+  frame: args.frame,
+  dataUri: !!args.dataUri,
+  debug: args.debug,
+  piskelAppJsPath: piskelAppJsPath,
+  scaledWidth: args.scaledWidth,
+  scaledHeight: args.scaledHeight
+};
+
+const childArgs = [
+  path.join(__dirname, 'piskel-export.js'),
+  piskelFile,
+  JSON.stringify(options)
+];
+
+if (args.debug) {
+  childArgs.unshift(
+    '--remote-debugger-port=9035',
+    '--remote-debugger-autorun=yes'
+  );
+}
+
+// Run phantom script
+childProcess.execFile(binPath, childArgs, function (err, stdout, stderr) {
+  // Print any output the from child process
+  if (err) console.log(err);
+  if (stderr) console.log(stderr);
+  if (stdout) console.log(stdout);
+
+  console.log('Export complete');
+});

cli/piskel-export.js

@@ -0,0 +1,45 @@
+// PhantomJS system
+const system = require('system');
+
+// Exporter
+const exporter = require('./export-png');
+
+// Get passed args
+const args = system.args;
+
+// Parse input piskel file and options
+const piskelFile = JSON.parse(args[1]);
+const options = JSON.parse(args[2]);
+
+// Create page w/ canvas
+const page = require('webpage').create();
+
+page.content = '<html><body></body></html>';
+
+// Inject Piskel JS
+page.injectJs(options.piskelAppJsPath);
+
+// Listen for page console logs
+page.onConsoleMessage = function (msg) {
+    console.log(msg);
+};
+
+// Run page logic
+page.evaluate(function (piskelFile, options, onPageEvaluate) {
+    // Zero out default body margin
+    document.body.style.margin = 0;
+
+    // Deserialize piskel file and run exporter's page evaluate task
+    pskl.utils.serialization.Deserializer.deserialize(piskelFile, function (piskel) {
+       onPageEvaluate(window, options, piskel);
+    });
+}, piskelFile, options, exporter.onPageEvaluate);
+
+// Wait for page to trigger exit
+page.onCallback = function (data) {
+    // Run exporter page exit task
+    exporter.onPageExit(page, options, data);
+
+    // Exit
+    phantom.exit(0);
+};

misc/icons/source/common-backup.svg

@@ -0,0 +1,80 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   version="1.1"
+   id="Layer_1"
+   x="0px"
+   y="0px"
+   width="90"
+   height="90"
+   viewBox="0 0 89.999997 90"
+   enable-background="new 0 0 89.231 100"
+   xml:space="preserve"
+   inkscape:version="0.92.1 r15371"
+   sodipodi:docname="common-backup.svg"
+   inkscape:export-filename="C:\Development\git\piskel\misc\icons\source\tool-rotate.png"
+   inkscape:export-xdpi="45"
+   inkscape:export-ydpi="45"><metadata
+     id="metadata15"><rdf:RDF><cc:Work
+         rdf:about=""><dc:format>image/svg+xml</dc:format><dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" /><dc:title></dc:title></cc:Work></rdf:RDF></metadata><defs
+     id="defs13" /><sodipodi:namedview
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1"
+     objecttolerance="10"
+     gridtolerance="10"
+     guidetolerance="10"
+     inkscape:pageopacity="0"
+     inkscape:pageshadow="2"
+     inkscape:window-width="1920"
+     inkscape:window-height="1148"
+     id="namedview11"
+     showgrid="false"
+     inkscape:zoom="7.75"
+     inkscape:cx="13.031976"
+     inkscape:cy="43.272537"
+     inkscape:window-x="-8"
+     inkscape:window-y="-8"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="Layer_1" /><g
+     id="g3760"
+     transform="matrix(0,-0.97677741,0.97203982,0,-2.1261998,91.355253)"
+     style="fill:#ff00ff;fill-opacity:1"><path
+       style="fill:#ff00ff;fill-opacity:1"
+       inkscape:connector-curvature="0"
+       id="path3"
+       d="m 29.229405,55.37008 c -0.387431,-1.333059 -0.642506,-2.72161 -0.738881,-4.152895 h -8.675106 c 0.115651,2.460738 0.552554,4.838559 1.260594,7.099021 z" /><path
+       style="fill:#ff00ff;fill-opacity:1"
+       inkscape:connector-curvature="0"
+       id="path5"
+       d="m 29.023802,70.783821 5.579515,-6.601516 c -1.862622,-1.780814 -3.387929,-3.907969 -4.44999,-6.287065 l -8.152106,2.946124 c 1.604978,3.800815 4.017584,7.185766 7.022581,9.942457 z" /><path
+       style="fill:#ff00ff;fill-opacity:1"
+       inkscape:connector-curvature="0"
+       id="path7"
+       d="m 47.110967,69.703978 c -3.887799,-0.260871 -7.469766,-1.6322 -10.437498,-3.790608 l -5.577588,6.598963 c 4.487901,3.403448 10.011517,5.524225 16.015086,5.803594 z" /><path
+       style="fill:#ff00ff;fill-opacity:1;stroke:none"
+       inkscape:connector-curvature="0"
+       id="path9"
+       d="M 48.464084,21.400659 V 14.532532 L 28.981398,25.698341 48.464084,36.86415 v -6.867489 c 11.042093,0 20.024317,8.91683 20.024317,19.877897 0,10.509484 -8.258763,19.134189 -18.671845,19.828145 v 8.611948 c 15.190751,-0.703524 27.330245,-13.189635 27.330245,-28.440093 0,-15.700763 -12.86681,-28.473899 -28.682717,-28.473899 z" /></g><g
+     id="g4513"
+     transform="translate(0,-2)"><rect
+       y="32.516129"
+       x="42"
+       height="15.612903"
+       width="7.9999986"
+       id="rect4494"
+       style="fill:#ff00f7;fill-opacity:1;stroke:#ffffed;stroke-width:0;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:6.04534006;stroke-opacity:1" /><rect
+       transform="rotate(120)"
+       y="-76.050484"
+       x="12.680965"
+       height="15.612903"
+       width="7.9999986"
+       id="rect4494-7"
+       style="fill:#ff00f7;fill-opacity:1;stroke:#ffffed;stroke-width:0;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:6.04534006;stroke-opacity:1" /></g></svg>

package.json

@@ -1,60 +1,67 @@
 {
   "name": "piskel",
-  "version": "0.11.0",
+  "version": "0.15.2-SNAPSHOT",
   "description": "Pixel art editor",
   "author": "Julian Descottes <julian.descottes@gmail.com>",
   "contributors": [
     "Vincent Renaudin"
   ],
-  "homepage": "http://github.com/juliandescottes/piskel",
+  "homepage": "http://github.com/piskelapp/piskel",
   "license": "Apache-2.0",
   "repository": {
     "type": "git",
-    "url": "http://github.com/juliandescottes/piskel.git"
+    "url": "http://github.com/piskelapp/piskel.git"
   },
   "files": [
     "dest/prod",
     "misc/scripts/piskel-root"
   ],
   "bin": {
-    "piskel-root": "./misc/scripts/piskel-root"
+    "piskel-root": "./misc/scripts/piskel-root",
+    "piskel-cli": "./cli/index.js"
   },
   "main": "./dest/prod/index.html",
   "scripts": {
     "test": "grunt test",
-    "start": "nodewebkit",
+    "dev": "grunt play",
+    "start": "grunt build && nw",
     "preversion": "grunt test build",
     "postversion": "git push && git push --tags && npm publish",
-    "release": "grunt && node ./bin/copy-to-piskel-website"
+    "release": "grunt && node ./bin/copy-to-piskel-website",
+    "build": "grunt desktop",
+    "build:mac": "grunt desktop-mac",
+    "format": "grunt eslint --fix"
   },
   "devDependencies": {
-    "dateformat": "2.0.0",
-    "fs-extra": "3.0.1",
-    "grunt": "0.4.5",
+    "dateformat": "4.5.1",
+    "fs-extra": "10.0.0",
+    "grunt": "1.4.1",
     "grunt-casperjs": "^2.2.1",
-    "grunt-contrib-clean": "1.1.0",
+    "grunt-cli": "^1.4.3",
+    "grunt-contrib-clean": "2.0.0",
     "grunt-contrib-concat": "1.0.1",
-    "grunt-contrib-connect": "1.0.2",
+    "grunt-contrib-connect": "3.0.0",
     "grunt-contrib-copy": "1.0.0",
-    "grunt-contrib-jshint": "1.1.0",
-    "grunt-contrib-uglify": "2.3.0",
-    "grunt-contrib-watch": "1.0.0",
-    "grunt-include-replace": "4.0.1",
-    "grunt-jscs": "2.8.0",
-    "grunt-karma": "1.0.0",
+    "grunt-contrib-jshint": "3.0.0",
+    "grunt-contrib-uglify": "5.0.1",
+    "grunt-contrib-watch": "^1.1.0",
+    "grunt-eslint": "23.0.0",
+    "grunt-include-replace": "5.0.0",
+    "grunt-jscs": "3.0.1",
+    "grunt-karma": "4.0.2",
     "grunt-leading-indent": "0.2.0",
     "grunt-nw-builder": "3.1.0",
-    "grunt-open": "0.2.3",
-    "grunt-replace": "1.0.1",
-    "grunt-spritesmith": "6.4.0",
-    "jasmine-core": "2.6.1",
-    "karma": "1.7.0",
-    "karma-jasmine": "1.1.0",
+    "grunt-replace": "2.0.2",
+    "grunt-spritesmith": "^6.9.0",
+    "jasmine-core": "3.8.0",
+    "karma": "6.3.4",
+    "karma-jasmine": "4.0.1",
     "karma-phantomjs-launcher": "1.0.4",
-    "load-grunt-tasks": "3.5.0",
+    "load-grunt-tasks": "5.1.0",
+    "nw": "0.54.0",
     "phantomjs": "2.1.7",
     "phantomjs-polyfill-object-assign": "0.0.2",
-    "promise-polyfill": "6.0.2",
+    "promise-polyfill": "8.2.0",
     "rmdir": "1.2.0"
   },
   "window": {
@@ -62,6 +69,9 @@
     "icon": "dest/prod/logo.png",
     "toolbar": false,
     "width": 1000,
-    "height": 500
+    "height": 700
+  },
+  "dependencies": {
+    "minimist": "^1.2.5"
   }
 }

src/css/dialogs-browse-backups.css

@@ -0,0 +1,152 @@
+#dialog-container.browse-backups {
+  width: 700px;
+  height: 500px;
+  top : 50%;
+  left : 50%;
+  position : absolute;
+  margin-left: -350px;
+}
+
+.backups-step-container {
+  width: 100%;
+  height: 100%;
+  display: flex;
+  flex-direction: column;
+}
+
+.backups-step-content {
+  width: 100%;
+  height: 10px;
+  flex-grow: 1;
+  background: #444;
+
+  padding: 20px;
+  overflow: auto;
+  box-sizing: border-box;
+}
+
+.backups-step-actions {
+  flex-grow: 0;
+  flex-shrink: 1;
+  height: 60px;
+  display: flex;
+  align-items: center;
+  padding: 0 20px;
+}
+
+.show #dialog-container.browse-backups {
+  margin-top: -250px;
+}
+
+.browse-backups .browse-backups-disclaimer {
+  display: flex;
+  margin-bottom: 20px;
+  align-items: center;
+}
+
+.browse-backups .browse-backups-disclaimer-content {
+  padding: 0 20px;
+  font-size: 13px;
+}
+
+.browse-backups .browse-backups-disclaimer .backups-icon {
+  border: 1px solid gold;
+  flex-shrink: 0;
+  width: 90px;
+  height: 90px;
+}
+
+.browse-backups .centered-message {
+  position: absolute;
+  left: 50%;
+  width: 200px;
+  margin-top: 100px;
+  margin-left: -130px;
+  padding: 30px;
+
+  font-size: 16px;
+  text-align: center;
+  border: 1px solid;
+}
+
+.browse-backups .session-list-empty,
+.browse-backups .snapshot-list-empty {
+  color: #bbb;
+}
+
+.browse-backups .session-list-error,
+.browse-backups .snapshot-list-error {
+  color: white;
+}
+
+.browse-backups .session-item {
+  /* Transition duration should be kept in sync with SelectSession.DELETE_TRANSITION_DURATION */
+  transition: all 500ms;
+}
+
+/* Hide and slide up next sessions when deleting an item */
+.browse-backups .session-item.deleting {
+  opacity: 0;
+  margin-bottom: -60px;
+}
+
+.browse-backups .session-item,
+.browse-backups .snapshot-item {
+  display: flex;
+  align-items: center;
+
+  width: 100%;
+  height: 80px;
+
+  margin-bottom: 10px;
+  padding: 0 20px;
+
+  border: 1px solid #666;
+  box-sizing: border-box;
+}
+
+.browse-backups .snapshot-preview {
+  flex-grow: 0;
+  flex-shrink: 1;
+  /* Keep synced with SessionDetails.PREVIEW_SIZE */
+  height: 60px;
+  width: 60px;
+  margin-right: 20px;
+}
+
+.browse-backups .session-details,
+.browse-backups .snapshot-details {
+  flex-grow: 1;
+  flex-shrink: 0;
+  display: flex;
+  flex-direction: column;
+}
+
+.browse-backups .session-details-title,
+.browse-backups .snapshot-details-title {
+  font-size: 13px;
+}
+
+.browse-backups .session-details-info,
+.browse-backups .snapshot-details-info {
+  font-size: 11px;
+  color: #bbb;
+  line-height: 1.5em;
+}
+
+.browse-backups .session-actions,
+.browse-backups .snapshot-actions {
+  flex-grow: 0;
+  flex-shrink: 1;
+  display: flex;
+}
+
+.browse-backups .session-actions button,
+.browse-backups .snapshot-actions button {
+  margin-left: 10px;
+}
+
+.browse-backups .session-item:last-child,
+.browse-backups .snapshot-item:last-child {
+  margin-bottom: 0;
+}

src/css/dialogs-import.css

@@ -183,22 +183,14 @@
 .import-meta-value,
 .import-meta-label {
   padding: 2px 4px;
-  border: 1px solid gold;
 }
 
 .import-meta-label {
   border-radius: 2px 0 0 2px;
   color: var(--highlight-color);
-  border-right-width: 0;
-}
-
-.import-meta-title .import-meta-label {
-  border-right-width: 1px;
-  border-radius: 2px;
 }
 
 .import-meta-value {
-  border-radius: 0 2px 2px 0;
   overflow: hidden;
   text-overflow: ellipsis;
   white-space: nowrap;
@@ -242,7 +234,7 @@
 .insert-mode-option {
   display: flex;
   align-items: center;
-  margin-bottom: 5px;
+  margin: 5px 0;
 }
 
 .import-resize-option :checked + span,
@@ -250,11 +242,15 @@
   color: var(--highlight-color);
 }
 
+.import-resize-option input,
+.insert-mode-option input {
+  margin: 5px;
+}
+
 /**
  * ADJUST SIZE
  */
-.import-resize-anchor-info,
-.import-resize-option-label {
+.import-resize-anchor-info {
   margin-bottom: 10px;
 }
 

src/css/frames-list.css

@@ -135,6 +135,11 @@
   cursor: default;
 }
 
+.preview-tile .tile-overlay.tile-count.toggled {
+  background-color: gold;
+  color: black;
+}
+
 .preview-tile .tile-overlay.delete-frame-action {
    top: 0;
    right: 0;

src/css/layout.css

@@ -25,7 +25,7 @@
 .left-column {
   vertical-align: top;
   height: 100%;
-  margin-right: 7px;
+  padding-right: 7px;
   flex-shrink: 0;
 }
 
@@ -44,7 +44,8 @@
   flex-direction: column;
   position: relative;
 
-  margin-left: 10px;
+  /* Keep in sync with Constants.RIGHT_COLUMN_PADDING_LEFT */
+  padding-left: 10px;
   /* Add some padding for the absolutely positioned .cursor-coordinates */
   padding-bottom: 20px;
 }
@@ -80,10 +81,21 @@
 }
 
 .cursor-coordinates {
-  color:#888;
-  font-size:12px;
-  font-weight:bold;
-  font-family:monospace;
+  color: var(--highlight-color);
+  font-size: 12px;
+  font-weight: bold;
+  font-family: monospace;
+}
+
+.cursor-coordinates .drawing-zoom {
+  position: absolute;
+  top: -20px;
+  left: 1px;
+}
+
+.cursor-coordinates .frame-info {
+  line-height: 1.5;
+  text-align: left;
 }
 
 /**
@@ -157,4 +169,4 @@
 .canvas.drawing-canvas       {z-index:  8;}
 .canvas.canvas-overlay       {z-index:  9;}
 .canvas.onion-skin-canvas    {z-index:  10;}
-.canvas.layers-above-canvas  {z-index:  11;}
+.canvas.layers-above-canvas  {z-index:  11;}

src/css/settings-application.css

@@ -1,11 +1,9 @@
-/*******************************/
-/*  Application Setting panel  */
-/*******************************/
-.application-settings-form {
-  height: 100%;
-}
+/********************************/
+/*  Preferences Settings panel  */
+/********************************/
 
-.settings-section-application {
+.settings-section-preferences {
+  height: 100%;
   position: relative;
   overflow: hidden;
   margin: 0 20px;
@@ -45,14 +43,11 @@
   vertical-align: middle;
 }
 
-.layer-opacity-input {
+.layer-opacity-input,
+.tile-mask-opacity-input {
   width: 100px;
 }
 
-.seamless-opacity-input {
-  width: 75px;
-}
-
 .settings-opacity-text {
   height: 31px;
   display: inline-block;
@@ -64,17 +59,88 @@
   text-align: center;
 }
 
+.settings-item-grid-size,
+.settings-item-grid-spacing,
+.settings-item-grid-color {
+  display: flex;
+  align-items: center;
+}
+
+.settings-item-grid-size > label,
+.settings-item-grid-spacing > label,
+.settings-item-grid-color > label {
+  width: 65px;
+  flex-shrink: 0;
+}
+
+.grid-spacing-container .size-picker-option[data-size='1'] {
+  padding: 7px;
+}
+.grid-spacing-container .size-picker-option[data-size='2'] {
+  padding: 6px;
+}
+.grid-spacing-container .size-picker-option[data-size='4'] {
+  padding: 5px;
+}
+.grid-spacing-container .size-picker-option[data-size='8'] {
+  padding: 4px;
+}
+.grid-spacing-container .size-picker-option[data-size='16'] {
+  padding: 3px;
+}
+.grid-spacing-container .size-picker-option[data-size='32'] {
+  padding: 2px;
+}
+.grid-spacing-container .size-picker-option[data-size='64'] {
+  padding: 1px;
+}
+
+.settings-item-grid-size .size-picker-option,
+.settings-item-grid-spacing .size-picker-option {
+  border-color: #888;
+}
+
+.settings-item-grid-size .size-picker-option:not(.selected):hover,
+.settings-item-grid-spacing .size-picker-option:not(.selected):hover {
+  border-color: white;
+}
+
 .grid-width-select,
 .color-format-select {
   margin: 5px 5px 0 5px;
 }
 
-.settings-section-application > .settings-title {
+
+.grid-colors-list {
+  overflow: hidden;
+  padding: 0 5px;
+}
+
+.grid-colors-item {
+  float: left;
+  width: 20px;
+  height: 20px;
+  cursor: pointer;
+  border: 2px solid #888;
+  margin-right: 2px;
+  margin-bottom: 2px;
+  box-sizing: border-box;
+}
+
+.grid-colors-item:hover {
+  border-color: white;
+}
+
+.grid-colors-item.selected {
+  border-color: gold;
+}
+
+.settings-section-preferences > .settings-title {
   /* Override the default 10px margin bottom for this panel */
   margin-bottom: 15px;
 }
 
-.settings-section-application .button-primary {
+.settings-section-preferences .button-primary {
   margin-top: 10px;
 }
 
@@ -91,4 +157,4 @@
 .settings-version:hover {
   color: white !important;
   text-decoration: none !important;
-}
+}

src/css/settings-export.css

@@ -43,8 +43,29 @@
   float : left;
 }
 
+.gif-export-warning {
+  display: none;
+}
+
+.gif-export-warning.visible {
+  display: flex;
+  align-items: center;
+  border: 1px solid red;
+  padding: 5px;
+  margin: 5px 0;
+}
+
+.gif-export-warning-icon {
+  flex-shrink: 0;
+  margin-right: 5px;
+}
+
+.gif-export-warning-message {
+  font-weight: normal;
+}
+
 .preview-upload-ongoing:before{
-  content: "Upload ongoing ...";
+  content: "Upload in progress...";
   position: absolute;
   display: block;
   height: 100%;
@@ -100,45 +121,6 @@
   line-height: 23px;
 }
 
-.export-tabs {
-  overflow: hidden;
-  position: relative;
-}
-
-.export-tabs:after {
-  content: "";
-  display: block;
-  position: absolute;
-  bottom: 0;
-  width: 100%;
-  height: 1px;
-  z-index: 0;
-  background-color: var(--highlight-color);
-}
-
-.export-tab {
-  float: left;
-  cursor: pointer;
-  padding: 5px;
-  border: 1px solid transparent;
-  border-radius: 2px 2px 0 0;
-  /* Make sure the tab and its border are positioned above the :after element; */
-  position: relative;
-  z-index: 1;
-}
-
-.export-tab.selected,
-.export-tab:hover {
-  color: var(--highlight-color);
-}
-
-.export-tab.selected {
-  border-color: var(--highlight-color);
-  border-bottom-color: #444;
-  border-style: solid;
-  border-width: 1px;
-}
-
 .export-panel-header {
   padding: 10px 5px 0px;
 }
@@ -162,7 +144,8 @@
   overflow: hidden;
 }
 
-.export-panel-gif .button {
+.export-panel-gif .button,
+.export-panel-png .button {
   margin-right: 5px;
   width: 75px;
   flex-shrink: 0;
@@ -172,11 +155,6 @@
   width: 50px;
 }
 
-.png-export-dimension-info,
-.png-export-datauri-info {
-  margin-left: 5px;
-}
-
 #png-export-columns,
 #png-export-rows {
   /* Override default textfield padding-right to keep the number spinners

src/css/style.css

@@ -52,7 +52,16 @@ body {
 }
 
 .checkbox-fix {
-  margin-left: 0;
+  margin: 3px 3px 3px 0;
+}
+
+.checkbox-container {
+  display: flex;
+  align-items: center;
+}
+
+.hidden {
+  display: none;
 }
 
 /**

src/css/toolbox-animated-preview.css

@@ -124,6 +124,14 @@
   border-color: var(--highlight-color);
 }
 
+/**
+ * If the icon represents an enabled state, the border should always be gold.
+ */
+.preview-contextual-action-enabled {
+  color: var(--highlight-color);
+  border-color: var(--highlight-color);
+}
+
 /**
  * Drop-down in preview size selection
  */
@@ -195,6 +203,7 @@
 
 @media (-webkit-min-device-pixel-ratio: 2),
        (min-resolution: 192dpi) {
-  background-image: url(../img/icons/minimap/minimap-popup-preview-arrow-gold@2x.png);
-
+  .icon-minimap-popup-preview-arrow-white:hover {
+    background-image: url(../img/icons/minimap/minimap-popup-preview-arrow-gold@2x.png);
+  }
 }

src/css/toolbox-layers-list.css

@@ -66,12 +66,17 @@
   cursor: pointer;
 }
 
-.layer-item .layer-name {
+.layer-item .layer-name,
+.layer-item .layer-name-input {
   padding: 0 0 0 10px;
   flex: 1 auto;
   white-space: nowrap;
 }
 
+.layer-item .layer-name-input {
+  width: 80%;
+}
+
 .layer-item .layer-name.overflowing-name {
   overflow: hidden;
   text-overflow: ellipsis;
@@ -82,7 +87,8 @@
 }
 
 .layer-item-opacity {
-  padding-right: 8px;
+  padding: 0 8px 0 8px;
+  flex: 0 auto;
 }
 
 .current-layer-item,

src/css/toolbox-palettes-list.css

@@ -76,6 +76,11 @@
   position: relative;
 }
 
+.palettes-list-colors.tiny > .palettes-list-color {
+  width: calc((100% - 35px) / 10);
+  height: 16px;
+}
+
 .palettes-list-color div {
   height: 100%;
 }
@@ -89,7 +94,7 @@
   line-height: 35px;
   width: 100%;
   color: gray;
-  font-size: 0.7em;
+  font-size: 0.8em;
   font-style: italic;
   text-align: center
 }
@@ -121,7 +126,8 @@
  * Color index for the 9 first colors
  */
 
-.palettes-list-color:nth-child(-n+10):after {
+:not(.tiny) > .palettes-list-color:nth-child(-n+10):after {
+  content: attr(data-color-index);
   position: absolute;
   top: 0;
   right: 0;
@@ -136,39 +142,3 @@
   padding: 2px 3px 2px 3px;
   border-radius: 0 0 0 2px;
 }
-
-.palettes-list-color:nth-child(1):after {
-  content: "1";
-}
-
-.palettes-list-color:nth-child(2):after {
-  content: "2";
-}
-
-.palettes-list-color:nth-child(3):after {
-  content: "3";
-}
-
-.palettes-list-color:nth-child(4):after {
-  content: "4";
-}
-
-.palettes-list-color:nth-child(5):after {
-  content: "5";
-}
-
-.palettes-list-color:nth-child(6):after {
-  content: "6";
-}
-
-.palettes-list-color:nth-child(7):after {
-  content: "7";
-}
-
-.palettes-list-color:nth-child(8):after {
-  content: "8";
-}
-
-.palettes-list-color:nth-child(9):after {
-  content: "9";
-}

src/css/transformations.css

@@ -3,5 +3,38 @@
 }
 
 .transformations-container .tool-icon {
-  float:left;
+  margin: 0 0 5px 0;
 }
+
+.transformations-container .tools-wrapper {
+  display: flex;
+  flex-wrap: wrap;
+  justify-content: space-between;
+  height: 46px;
+
+  /* Override the float:left set on tools-wrapper in layout.css; */
+  float: initial;
+}
+
+.transformations-container.show-more .tools-wrapper {
+  height: auto;
+  /* Compensate the 5px bottom-margin coming from the tool-icon */
+  margin-bottom: -5px;
+}
+
+.transformations-show-more-link {
+  position: absolute;
+  color: #999;
+  right: 10px;
+  font-weight: normal;
+  cursor: pointer;
+  transition: 0.2s linear;
+}
+
+.transformations-show-more-link:hover {
+  color: white;
+}
+
+.show-more .transformations-show-more-link {
+  color: gold;
+}

src/css/widgets-size-picker.css

@@ -1,9 +1,13 @@
-.pen-size-container {
+/***********************/
+/* SIZE PICKER WIDGET */
+/***********************/
+
+.size-picker-container {
   overflow: hidden;
   padding: 5px 5px;
 }
 
-.pen-size-option {
+.size-picker-option {
   float: left;
   box-sizing: border-box;
   width: 20px;
@@ -15,20 +19,20 @@
   cursor: pointer;
 }
 
-.pen-size-option[data-size='1'] {
+.size-picker-option[data-size='1'] {
   padding: 5px;
 }
-.pen-size-option[data-size='2'] {
+.size-picker-option[data-size='2'] {
   padding: 4px;
 }
-.pen-size-option[data-size='3'] {
+.size-picker-option[data-size='3'] {
   padding: 3px;
 }
-.pen-size-option[data-size='4'] {
+.size-picker-option[data-size='4'] {
   padding: 2px;
 }
 
-.pen-size-option:before {
+.size-picker-option:before {
   content: '';
   width: 100%;
   height: 100%;
@@ -39,19 +43,19 @@
   font-size: 90%;
 }
 
-.pen-size-option:hover {
+.size-picker-option:hover {
   border-color: #888;
 }
 
-.pen-size-option.selected:before {
+.size-picker-option.selected:before {
   background-color: var(--highlight-color);
 }
 
-.pen-size-option.selected {
+.size-picker-option.selected {
   border-color: var(--highlight-color);
 }
 
-.pen-size-option.labeled:before {
-  content: attr(real-pen-size);
+.size-picker-option.labeled:before {
+  content: attr(real-size);
   color: black;
 }

src/css/widgets-tabs.css

@@ -0,0 +1,42 @@
+/*****************/
+/*  TABS WIDGET  */
+/*****************/
+
+.tab-list {
+  overflow: hidden;
+  position: relative;
+}
+
+.tab-list:after {
+  content: "";
+  display: block;
+  position: absolute;
+  bottom: 0;
+  width: 100%;
+  height: 1px;
+  z-index: 0;
+  background-color: var(--highlight-color);
+}
+
+.tab-item {
+  float: left;
+  cursor: pointer;
+  padding: 5px;
+  border: 1px solid transparent;
+  border-radius: 2px 2px 0 0;
+  /* Make sure the tab and its border are positioned above the :after element; */
+  position: relative;
+  z-index: 1;
+}
+
+.tab-item.selected,
+.tab-item:hover {
+  color: var(--highlight-color);
+}
+
+.tab-item.selected {
+  border-color: var(--highlight-color);
+  border-bottom-color: #444;
+  border-style: solid;
+  border-width: 1px;
+}

src/index.html

@@ -22,9 +22,7 @@
     color:white;">
       <span style="top:45%">Loading Piskel ...</span>
   </div>
-  <!--standalone-start-->
   @@include('templates/debug-header.html', {})
-  <!--standalone-end-->
 
   <!-- the comment below indicates the beginning of markup reused by the editor integrated in piskelapp.com -->
   <!-- do not delete, do not move :) -->
@@ -69,6 +67,7 @@
   </div>
 
   @@include('templates/misc-templates.html', {})
+  @@include('templates/data-uri-export.html', {})
   @@include('templates/popup-preview.html', {})
 
   <span class="cheatsheet-link icon-common-keyboard-gold"
@@ -77,15 +76,19 @@
        rel="tooltip" data-placement="left" title="Performance problem detected, learn more.">&nbsp;</div>
 
   <!-- dialogs partials -->
-  @@include('templates/dialogs/create-palette.html', {})
+  @@include('templates/dialogs/browse-backups.html', {})
   @@include('templates/dialogs/browse-local.html', {})
   @@include('templates/dialogs/cheatsheet.html', {})
+  @@include('templates/dialogs/create-palette.html', {})
   @@include('templates/dialogs/import.html', {})
   @@include('templates/dialogs/performance-info.html', {})
   @@include('templates/dialogs/unsupported-browser.html', {})
 
   <!-- settings-panel partials -->
-  @@include('templates/settings/application.html', {})
+  @@include('templates/settings/preferences.html', {})
+  @@include('templates/settings/preferences/grid.html', {})
+  @@include('templates/settings/preferences/misc.html', {})
+  @@include('templates/settings/preferences/tile.html', {})
   @@include('templates/settings/resize.html', {})
   @@include('templates/settings/save.html', {})
   @@include('templates/settings/import.html', {})

src/js/.eslintrc

@@ -0,0 +1,99 @@
+{
+  "env": {
+    "es6": true,
+    "browser": true
+  },
+  "globals": {
+    "$": true,
+    "jQuery": true,
+    "pskl": true,
+    "Events": true,
+    "Constants": true,
+    "console": true,
+    "module": true,
+    "require": true,
+    "Q": true,
+    "Promise": true
+  },
+  "rules": {
+    "no-undef": 2,
+    "no-use-before-define": [
+      2,
+      {
+        "functions": false
+      }
+    ],
+    "curly": [
+      2,
+      "all"
+    ],
+    "operator-linebreak": [
+      2,
+      "after"
+    ],
+    "camelcase": [
+      2,
+      {
+        "properties": "never"
+      }
+    ],
+    "max-len": [
+      2,
+      120
+    ],
+    "indent": [
+      2,
+      2,
+      {
+        "SwitchCase": 1
+      }
+    ],
+    "quotes": [
+      2,
+      "single"
+    ],
+    "no-multi-str": 2,
+    "no-mixed-spaces-and-tabs": 2,
+    "no-trailing-spaces": 2,
+    "space-unary-ops": [
+      2,
+      {
+        "nonwords": false,
+        "overrides": {}
+      }
+    ],
+    "one-var": [
+      2,
+      "never"
+    ],
+    "brace-style": [
+      2,
+      "1tbs",
+      {
+        "allowSingleLine": true
+      }
+    ],
+    "keyword-spacing": [
+      2,
+      {}
+    ],
+    "space-infix-ops": 2,
+    "space-before-blocks": [
+      2,
+      "always"
+    ],
+    "eol-last": 2,
+    "space-in-parens": [
+      2,
+      "never"
+    ],
+    "no-multiple-empty-lines": 2,
+    "no-with": 2,
+    "no-spaced-func": 2,
+    "dot-notation": 2,
+    "semi": [
+      2,
+      "always"
+    ]
+  }
+}

src/js/Constants.js

@@ -12,13 +12,15 @@ var Constants = {
   MAX_HEIGHT : 1024,
   MAX_WIDTH : 1024,
 
-  MAX_PALETTE_COLORS : 100,
+  MAX_PALETTE_COLORS : 256,
   // allow current colors service to get up to 256 colors.
   // GIF generation is different if the color count goes over 256.
   MAX_WORKER_COLORS : 256,
 
   PREVIEW_FILM_SIZE : 96,
   ANIMATED_PREVIEW_WIDTH : 200,
+  // Keep in sync with padding-left: 10px in layout.css
+  RIGHT_COLUMN_PADDING_LEFT : 10,
 
   DEFAULT_PEN_COLOR : '#000000',
   TRANSPARENT_COLOR : 'rgba(0, 0, 0, 0)',
@@ -58,8 +60,11 @@ var Constants = {
   // The datastore limit is 1 MiB, which we roughly approximate to 1 million characters.
   APPENGINE_SAVE_LIMIT : 1 * 1024 * 1024,
 
+  // Message displayed when an action will lead to erase the current animation.
+  CONFIRM_OVERWRITE: 'This will replace your current animation, are you sure you want to continue?',
+
   // SERVICE URLS
   APPENGINE_SAVE_URL : 'save',
-  IMAGE_SERVICE_UPLOAD_URL : 'http://piskel-imgstore-b.appspot.com/__/upload',
-  IMAGE_SERVICE_GET_URL : 'http://piskel-imgstore-b.appspot.com/img/'
+  IMAGE_SERVICE_UPLOAD_URL : '{{protocol}}://piskel-imgstore-b.appspot.com/__/upload',
+  IMAGE_SERVICE_GET_URL : '{{protocol}}://piskel-imgstore-b.appspot.com/img/'
 };

src/js/Events.js

@@ -64,9 +64,10 @@ var Events = {
   SELECTION_CREATED: 'SELECTION_CREATED',
   SELECTION_MOVE_REQUEST: 'SELECTION_MOVE_REQUEST',
   SELECTION_DISMISSED: 'SELECTION_DISMISSED',
-  SELECTION_COPY: 'SELECTION_COPY',
-  SELECTION_CUT: 'SELECTION_CUT',
-  SELECTION_PASTE: 'SELECTION_PASTE',
+
+  CLIPBOARD_COPY: 'CLIPBOARD_COPY',
+  CLIPBOARD_CUT: 'CLIPBOARD_CUT',
+  CLIPBOARD_PASTE: 'CLIPBOARD_PASTE',
 
   SHOW_NOTIFICATION: 'SHOW_NOTIFICATION',
   HIDE_NOTIFICATION: 'HIDE_NOTIFICATION',

src/js/app.js

@@ -15,6 +15,9 @@
        */
       this.isAppEngineVersion = !!pskl.appEngineToken_;
 
+      // This id is used to keep track of sessions in the BackupService.
+      this.sessionId = pskl.utils.Uuid.generate();
+
       this.shortcutService = new pskl.service.keyboard.ShortcutService();
       this.shortcutService.init();
 
@@ -61,24 +64,24 @@
 
       this.drawingController = new pskl.controller.DrawingController(
         this.piskelController,
-        $('#drawing-canvas-container'));
+        document.querySelector('#drawing-canvas-container'));
       this.drawingController.init();
 
       this.previewController = new pskl.controller.preview.PreviewController(
         this.piskelController,
-        $('#animated-preview-canvas-container'));
+        document.querySelector('#animated-preview-canvas-container'));
       this.previewController.init();
 
       this.minimapController = new pskl.controller.MinimapController(
         this.piskelController,
         this.previewController,
         this.drawingController,
-        $('.minimap-container'));
+        document.querySelector('.minimap-container'));
       this.minimapController.init();
 
       this.framesListController = new pskl.controller.FramesListController(
         this.piskelController,
-        $('#preview-list-wrapper').get(0));
+        document.querySelector('#preview-list-wrapper'));
       this.framesListController.init();
 
       this.layersListController = new pskl.controller.LayersListController(this.piskelController);
@@ -111,6 +114,9 @@
       this.canvasBackgroundController = new pskl.controller.CanvasBackgroundController();
       this.canvasBackgroundController.init();
 
+      this.indexedDbStorageService = new pskl.service.storage.IndexedDbStorageService(this.piskelController);
+      this.indexedDbStorageService.init();
+
       this.localStorageService = new pskl.service.storage.LocalStorageService(this.piskelController);
       this.localStorageService.init();
 
@@ -165,6 +171,9 @@
         this.currentColorsService);
       this.performanceReportService.init();
 
+      this.clipboardService = new pskl.service.ClipboardService(this.piskelController);
+      this.clipboardService.init();
+
       this.drawingLoop = new pskl.rendering.DrawingLoop();
       this.drawingLoop.addCallback(this.render, this);
       this.drawingLoop.start();
@@ -192,6 +201,11 @@
           dialogId : 'unsupported-browser'
         });
       }
+
+      if (pskl.utils.Environment.isDebug()) {
+        pskl.app.shortcutService.registerShortcut(pskl.service.keyboard.Shortcuts.DEBUG.RELOAD_STYLES,
+          window.reloadStyles);
+      }
     },
 
     loadPiskel_ : function (piskelData) {

src/js/controller/CursorCoordinatesController.js

@@ -17,6 +17,8 @@
     $.subscribe(Events.DRAG_START, this.onDragStart_.bind(this));
     $.subscribe(Events.DRAG_END, this.onDragEnd_.bind(this));
     $.subscribe(Events.FRAME_SIZE_CHANGED, this.redraw.bind(this));
+    $.subscribe(Events.ZOOM_CHANGED, this.redraw.bind(this));
+    $.subscribe(Events.PISKEL_RESET, this.redraw.bind(this));
 
     this.redraw();
   };
@@ -39,7 +41,18 @@
       }
     }
 
-    this.coordinatesContainer.innerHTML = this.getFrameSizeHTML_() + html;
+    if (pskl.app.drawingController) {
+      var zoom = pskl.app.drawingController.compositeRenderer.getZoom().toFixed(2);
+      html += '<div class="drawing-zoom">x' + zoom + '</div>';
+    }
+
+    this.coordinatesContainer.innerHTML = this.getFrameSizeHTML_() + html + this.getCurrentFrameIndexHTML_();
+  };
+
+  ns.CursorCoordinatesController.prototype.getCurrentFrameIndexHTML_ = function () {
+    var currentFrameIndex = this.piskelController.getCurrentFrameIndex() + 1;
+    var frameCount = this.piskelController.getFrameCount();
+    return '<div class="frame-info">' + currentFrameIndex + '/' + frameCount + '</div>';
   };
 
   ns.CursorCoordinatesController.prototype.getFrameSizeHTML_ = function () {

src/js/controller/DrawingController.js

@@ -22,7 +22,7 @@
 
     var cfg = {
       'zoom': this.calculateZoom_(),
-      'supportGridRendering' : true,
+      'supportGridRendering' : false,
       'height' : this.getContainerHeight_(),
       'width' : this.getContainerWidth_(),
       'xOffset' : 0,
@@ -30,9 +30,10 @@
     };
 
     this.overlayRenderer = new pskl.rendering.frame.CachedFrameRenderer(this.container, cfg, ['canvas-overlay']);
-    this.renderer = new pskl.rendering.frame.CachedFrameRenderer(this.container, cfg, ['drawing-canvas']);
     this.onionSkinRenderer = pskl.rendering.OnionSkinRenderer.createInContainer(this.container, cfg, piskelController);
     this.layersRenderer = new pskl.rendering.layer.LayersRenderer(this.container, cfg, piskelController);
+    cfg.supportGridRendering = true;
+    this.renderer = new pskl.rendering.frame.CachedFrameRenderer(this.container, cfg, ['drawing-canvas']);
 
     this.compositeRenderer = new pskl.rendering.CompositeRenderer();
     this.compositeRenderer
@@ -50,12 +51,12 @@
   ns.DrawingController.prototype.init = function () {
     this.initMouseBehavior();
 
-    $.subscribe(Events.TOOL_SELECTED, $.proxy(function(evt, toolBehavior) {
+    $.subscribe(Events.TOOL_SELECTED, (function(evt, toolBehavior) {
       this.currentToolBehavior = toolBehavior;
       this.overlayFrame.clear();
-    }, this));
+    }).bind(this));
 
-    $(window).resize($.proxy(this.startResizeTimer_, this));
+    window.addEventListener('resize', this.startResizeTimer_.bind(this));
 
     $.subscribe(Events.USER_SETTINGS_CHANGED, this.onUserSettingsChange_.bind(this));
     $.subscribe(Events.FRAME_SIZE_CHANGED, this.onFrameSizeChange_.bind(this));
@@ -64,6 +65,10 @@
     pskl.app.shortcutService.registerShortcut(shortcuts.MISC.RESET_ZOOM, this.resetZoom_.bind(this));
     pskl.app.shortcutService.registerShortcut(shortcuts.MISC.INCREASE_ZOOM, this.updateZoom_.bind(this, 1));
     pskl.app.shortcutService.registerShortcut(shortcuts.MISC.DECREASE_ZOOM, this.updateZoom_.bind(this, -1));
+    pskl.app.shortcutService.registerShortcut(shortcuts.MISC.OFFSET_UP, this.updateOffset_.bind(this, 'up'));
+    pskl.app.shortcutService.registerShortcut(shortcuts.MISC.OFFSET_RIGHT, this.updateOffset_.bind(this, 'right'));
+    pskl.app.shortcutService.registerShortcut(shortcuts.MISC.OFFSET_DOWN, this.updateOffset_.bind(this, 'down'));
+    pskl.app.shortcutService.registerShortcut(shortcuts.MISC.OFFSET_LEFT, this.updateOffset_.bind(this, 'left'));
 
     window.setTimeout(function () {
       this.afterWindowResize_();
@@ -72,13 +77,12 @@
   };
 
   ns.DrawingController.prototype.initMouseBehavior = function() {
-    var body = $('body');
-    this.container.mousedown($.proxy(this.onMousedown_, this));
+    this.container.addEventListener('mousedown', this.onMousedown_.bind(this));
 
     if (pskl.utils.UserAgent.isChrome || pskl.utils.UserAgent.isIE11) {
-      this.container.on('mousewheel', $.proxy(this.onMousewheel_, this));
+      this.container.addEventListener('mousewheel', this.onMousewheel_.bind(this));
     } else {
-      this.container.on('wheel', $.proxy(this.onMousewheel_, this));
+      this.container.addEventListener('wheel', this.onMousewheel_.bind(this));
     }
 
     window.addEventListener('mouseup', this.onMouseup_.bind(this));
@@ -89,22 +93,20 @@
     window.addEventListener('touchend', this.onTouchend_.bind(this));
 
     // Deactivate right click:
-    body.contextmenu(this.onCanvasContextMenu_);
-
+    document.body.addEventListener('contextmenu', this.onCanvasContextMenu_.bind(this));
   };
 
   ns.DrawingController.prototype.startResizeTimer_ = function () {
     if (this.resizeTimer) {
       window.clearInterval(this.resizeTimer);
     }
-    this.resizeTimer = window.setTimeout($.proxy(this.afterWindowResize_, this), 200);
+    this.resizeTimer = window.setTimeout(this.afterWindowResize_.bind(this), 200);
   };
 
   ns.DrawingController.prototype.afterWindowResize_ = function () {
     var initialWidth = this.compositeRenderer.getDisplaySize().width;
 
     this.compositeRenderer.setDisplaySize(this.getContainerWidth_(), this.getContainerHeight_());
-    this.centerColumnWrapperHorizontally_();
     var ratio = this.compositeRenderer.getDisplaySize().width / initialWidth;
     var newZoom = ratio * this.compositeRenderer.getZoom();
     this.compositeRenderer.setZoom(newZoom);
@@ -129,7 +131,6 @@
 
   ns.DrawingController.prototype.onFrameSizeChange_ = function () {
     this.compositeRenderer.setDisplaySize(this.getContainerWidth_(), this.getContainerHeight_());
-    this.centerColumnWrapperHorizontally_();
     this.compositeRenderer.setZoom(this.calculateZoom_());
     this.compositeRenderer.setOffset(0, 0);
     $.publish(Events.ZOOM_CHANGED);
@@ -237,8 +238,7 @@
     $.publish(Events.CURSOR_MOVED, [coords.x, coords.y]);
   };
 
-  ns.DrawingController.prototype.onMousewheel_ = function (jQueryEvent) {
-    var evt = jQueryEvent.originalEvent;
+  ns.DrawingController.prototype.onMousewheel_ = function (evt) {
     // Ratio between wheelDeltaY (mousewheel event) and deltaY (wheel event) is -40
     var delta;
     if (pskl.utils.UserAgent.isIE11) {
@@ -262,6 +262,29 @@
     this.updateZoom_(modifier, coords);
   };
 
+  /**
+   * Update the current viewport offset of 1 pixel in the provided direction.
+   * Direction can be one of 'up', 'right', 'down', 'left'.
+   * Callback for the OFFSET_${DIR} shortcuts.
+   */
+  ns.DrawingController.prototype.updateOffset_ = function (direction) {
+    var off = this.getOffset();
+    if (direction === 'up') {
+      off.y -= 1;
+    } else if (direction === 'right') {
+      off.x += 1;
+    } else if (direction === 'down') {
+      off.y += 1;
+    } else if (direction === 'left') {
+      off.x -= 1;
+    }
+
+    this.setOffset(
+      off.x,
+      off.y
+    );
+  };
+
   /**
    * Update the current zoom level by a given multiplier.
    *
@@ -323,6 +346,8 @@
       // Picking color after ALT+click or middle mouse button click.
       this.pickColorAt_(coords);
       this.isPickingColor = false;
+      // Flash the cursor to briefly show the colorpicker cursor.
+      this.flashColorPicker_();
     } else if (isMiddleDrag) {
       // Stop the drag handler after a middle button drag action.
       this.dragHandler.stopDrag();
@@ -358,6 +383,16 @@
     $.publish(evt, [color]);
   };
 
+  ns.DrawingController.prototype.flashColorPicker_ = function () {
+    document.body.classList.add('tool-colorpicker');
+    document.body.classList.remove(this.currentToolBehavior.toolId);
+    window.clearTimeout(this.flashColorPickerTimer);
+    this.flashColorPickerTimer = window.setTimeout(function () {
+      document.body.classList.remove('tool-colorpicker');
+      document.body.classList.add(this.currentToolBehavior.toolId);
+    }.bind(this), 200);
+  };
+
   /**
    * Translate absolute x,y screen coordinates into sprite coordinates
    * @param  {Number} screenX
@@ -376,7 +411,8 @@
    * @private
    */
   ns.DrawingController.prototype.onCanvasContextMenu_ = function (event) {
-    if ($(event.target).closest('#drawing-canvas-container').length) {
+    // closest() not really available everywhere yet, just skip if missing.
+    if (event.target.closest && event.target.closest('#drawing-canvas-container')) {
       // Deactivate right click on drawing canvas only.
       event.preventDefault();
       event.stopPropagation();
@@ -414,17 +450,21 @@
   };
 
   ns.DrawingController.prototype.getAvailableHeight_ = function () {
-    return $('#main-wrapper').height();
+    return document.querySelector('#main-wrapper').getBoundingClientRect().height;
+  };
+
+  ns.DrawingController.prototype.getSelectorWidth_ = function (selector) {
+    return document.querySelector(selector).getBoundingClientRect().width;
   };
 
   ns.DrawingController.prototype.getAvailableWidth_ = function () {
-    var leftSectionWidth = $('.left-column').outerWidth(true);
-    var rightSectionWidth = $('.right-column').outerWidth(true);
-    var toolsContainerWidth = $('#tool-section').outerWidth(true);
-    var settingsContainerWidth = $('#application-action-section').outerWidth(true);
+    var leftSectionWidth = this.getSelectorWidth_('.left-column');
+    var rightSectionWidth = this.getSelectorWidth_('.right-column');
+    var toolsContainerWidth = this.getSelectorWidth_('#tool-section');
+    var settingsContainerWidth = this.getSelectorWidth_('#application-action-section');
 
     var usedWidth = leftSectionWidth + rightSectionWidth + toolsContainerWidth + settingsContainerWidth;
-    var availableWidth = $('#main-wrapper').width() - usedWidth;
+    var availableWidth = this.getSelectorWidth_('#main-wrapper') - usedWidth;
 
     var comfortMargin = 10;
     return availableWidth - comfortMargin;
@@ -438,17 +478,6 @@
     return this.getAvailableWidth_();
   };
 
-  /**
-   * @private
-   */
-  ns.DrawingController.prototype.centerColumnWrapperHorizontally_ = function() {
-    var containerHeight = this.getContainerHeight_();
-    var verticalGapInPixel = Math.floor(($('#main-wrapper').height() - containerHeight) / 2);
-    $('#column-wrapper').css({
-      'top': verticalGapInPixel + 'px'
-    });
-  };
-
   ns.DrawingController.prototype.getRenderer = function () {
     return this.compositeRenderer;
   };

src/js/controller/FramesListController.js

@@ -5,7 +5,8 @@
     SELECT : 'select',
     CLONE : 'clone',
     DELETE : 'delete',
-    NEW_FRAME : 'newframe'
+    NEW_FRAME : 'newframe',
+    TOGGLE: 'toggle'
   };
 
   ns.FramesListController = function (piskelController, container) {
@@ -114,6 +115,8 @@
       this.tiles.push(newtile);
       this.previewList.insertBefore(newtile, this.addFrameTile);
       this.updateScrollerOverflows();
+    } else if (action == ACTION.TOGGLE) {
+      this.piskelController.toggleFrameVisibilityAt(index);
     }
 
     this.flagForRedraw_();
@@ -127,10 +130,18 @@
       // Remove selected class
       this.tiles[i].classList.remove('selected');
 
+      // Remove toggle class
+      this.tiles[i].querySelector('.tile-count').classList.remove('toggled');
+
       // Update tile numbers
       this.tiles[i].setAttribute('data-tile-number', i);
       this.tiles[i].querySelector('.tile-count').innerHTML = (i + 1);
 
+      // Update visibility
+      if (this.piskelController.hasVisibleFrameAt(i)) {
+        this.tiles[i].querySelector('.tile-count').classList.add('toggled');
+      }
+
       // Check if any tile is updated
       var hash = this.piskelController.getCurrentLayer().getFrameAt(i).getHash();
       if (this.tiles[i].getAttribute('data-tile-hash') !== hash) {
@@ -162,7 +173,10 @@
     this.previewList.innerHTML = '';
 
     // Manually remove tooltips since mouseout events were shortcut by the DOM refresh:
-    $('.tooltip').remove();
+    var tooltips = document.querySelectorAll('.tooltip');
+    Array.prototype.forEach.call(tooltips, function (tooltip) {
+      tooltip.parentNode.removeChild(tooltip);
+    });
 
     var frameCount = this.piskelController.getFrameCount();
 
@@ -190,8 +204,8 @@
   ns.FramesListController.prototype.initDragndropBehavior_ = function () {
     $(this.previewList).sortable({
       placeholder: 'preview-tile preview-tile-drop-proxy',
-      update: $.proxy(this.onUpdate_, this),
-      stop: $.proxy(this.onSortableStop_, this),
+      update: this.onUpdate_.bind(this),
+      stop: this.onSortableStop_.bind(this),
       items: '.preview-tile',
       axis: 'y',
       tolerance: 'pointer'
@@ -203,8 +217,10 @@
    * @private
    */
   ns.FramesListController.prototype.onUpdate_ = function (event, ui) {
-    var originFrameId = parseInt(ui.item.data('tile-number'), 10);
-    var targetInsertionId = $('.preview-tile').index(ui.item);
+    var movedItem = ui.item.get(0);
+    var originFrameId = parseInt(movedItem.dataset.tileNumber, 10);
+    var tiles = document.querySelectorAll('.preview-tile');
+    var targetInsertionId = Array.prototype.indexOf.call(tiles, movedItem);
 
     this.piskelController.moveFrame(originFrameId, targetInsertionId);
     this.piskelController.setCurrentFrameIndex(targetInsertionId);
@@ -220,14 +236,13 @@
   ns.FramesListController.prototype.onSortableStop_ = function (event, ui) {
     this.justDropped = true;
 
-    this.resizeTimer = window.setTimeout($.proxy(function() {
+    this.resizeTimer = window.setTimeout((function() {
       this.justDropped = false;
-    }, this), 200);
+    }).bind(this), 200);
   };
 
   /**
    * @private
-   * TODO(vincz): clean this giant rendering function & remove listeners.
    */
   ns.FramesListController.prototype.createPreviewTile_ = function(tileNumber) {
     var currentFrame = this.piskelController.getCurrentLayer().getFrameAt(tileNumber);
@@ -286,8 +301,12 @@
     previewTileRoot.appendChild(dndHandle);
 
     // Add tile count
-    var tileCount = document.createElement('div');
-    tileCount.className = 'tile-overlay tile-count';
+    var tileCount = document.createElement('button');
+    tileCount.setAttribute('rel', 'tooltip');
+    tileCount.setAttribute('title', 'Toggle for preview');
+    tileCount.setAttribute('data-tile-number', tileNumber);
+    tileCount.setAttribute('data-tile-action', ACTION.TOGGLE);
+    tileCount.className = 'tile-overlay tile-count toggle-frame-action';
     tileCount.innerHTML = tileNumber + 1;
     previewTileRoot.appendChild(tileCount);
 

src/js/controller/LayersListController.js

@@ -1,15 +1,18 @@
 (function () {
   var ns = $.namespace('pskl.controller');
 
-  var TOGGLE_LAYER_SHORTCUT = 'alt+L';
-
   ns.LayersListController = function (piskelController) {
     this.piskelController = piskelController;
-    this.layerPreviewShortcut = pskl.service.keyboard.Shortcuts.MISC.LAYER_PREVIEW  ;
+    this.layerPreviewShortcut = pskl.service.keyboard.Shortcuts.MISC.LAYER_PREVIEW;
+    this.startRenamingCurrentLayer_ = this.startRenamingCurrentLayer_.bind(this);
+    this.onRenameInput_ = this.onRenameInput_.bind(this);
   };
 
   ns.LayersListController.prototype.init = function () {
+    this.isRenaming = false;
+
     this.layerItemTemplate_ = pskl.utils.Template.get('layer-item-template');
+    this.layerNameInputTemplate_ = pskl.utils.Template.get('layer-name-input-template');
     this.rootEl = document.querySelector('.layers-list-container');
     this.layersListEl = document.querySelector('.layers-list');
     this.toggleLayerPreviewEl = document.querySelector('.layers-toggle-preview');
@@ -17,14 +20,14 @@
     this.rootEl.addEventListener('click', this.onClick_.bind(this));
     this.toggleLayerPreviewEl.addEventListener('click', this.toggleLayerPreview_.bind(this));
 
-    this.initCreateLayerButton_();
+    this.createButtonTooltips_();
     this.initToggleLayerPreview_();
 
     this.renderLayerList_();
     this.updateToggleLayerPreview_();
 
     $.subscribe(Events.PISKEL_RESET, this.renderLayerList_.bind(this));
-    $.subscribe(Events.USER_SETTINGS_CHANGED, $.proxy(this.onUserSettingsChange_, this));
+    $.subscribe(Events.USER_SETTINGS_CHANGED, this.onUserSettingsChange_.bind(this));
   };
 
   ns.LayersListController.prototype.renderLayerList_ = function () {
@@ -46,12 +49,24 @@
     }
   };
 
-  ns.LayersListController.prototype.initCreateLayerButton_ = function () {
-    var tooltip = pskl.utils.TooltipFormatter.format('Create a layer', null, [
+  ns.LayersListController.prototype.createButtonTooltips_ = function () {
+    var addTooltip = pskl.utils.TooltipFormatter.format('Create a layer', null, [
       {key : 'shift', description : 'Clone current layer'}
     ]);
     var addButton = this.rootEl.querySelector('[data-action="add"]');
-    addButton.setAttribute('title', tooltip);
+    addButton.setAttribute('title', addTooltip);
+
+    var moveDownTooltip = pskl.utils.TooltipFormatter.format('Move layer down', null, [
+      {key : 'shift', description : 'Move to the bottom'}
+    ]);
+    var moveDownButton = this.rootEl.querySelector('[data-action="down"]');
+    moveDownButton.setAttribute('title', moveDownTooltip);
+
+    var moveUpTooltip = pskl.utils.TooltipFormatter.format('Move layer up', null, [
+      {key : 'shift', description : 'Move to the top'}
+    ]);
+    var moveUpButton = this.rootEl.querySelector('[data-action="up"]');
+    moveUpButton.setAttribute('title', moveUpTooltip);
   };
 
   ns.LayersListController.prototype.initToggleLayerPreview_ = function () {
@@ -65,7 +80,6 @@
 
   ns.LayersListController.prototype.updateButtonStatus_ = function () {
     var layers = this.piskelController.getLayers();
-    var currentLayer = this.piskelController.getCurrentLayer();
     var index = this.piskelController.getCurrentLayerIndex();
 
     var isLast = index === 0;
@@ -106,19 +120,46 @@
 
   ns.LayersListController.prototype.addLayerItem = function (layer, index) {
     var isSelected = this.piskelController.getCurrentLayer() === layer;
+    var isRenaming = isSelected && this.isRenaming;
     var layerItemHtml = pskl.utils.Template.replace(this.layerItemTemplate_, {
       'layername' : layer.getName(),
       'layerindex' : index,
       'isselected:current-layer-item' : isSelected,
-      'opacity': layer.getOpacity()
+      'opacity' : layer.getOpacity()
     });
     var layerItem = pskl.utils.Template.createFromHTML(layerItemHtml);
     this.layersListEl.insertBefore(layerItem, this.layersListEl.firstChild);
     if (layerItem.offsetWidth < layerItem.scrollWidth) {
-      $(layerItem).find('.layer-name')
-        .addClass('overflowing-name')
-        .attr('title', layer.getName())
-        .tooltip();
+      var layerNameEl = layerItem.querySelector('.layer-name');
+      layerNameEl.classList.add('overflowing-name');
+      layerNameEl.setAttribute('title', layer.getName());
+      layerNameEl.setAttribute('rel', 'tooltip');
+    }
+    if (isSelected) {
+      layerItem.removeEventListener('dblclick', this.startRenamingCurrentLayer_);
+      layerItem.addEventListener('dblclick', this.startRenamingCurrentLayer_);
+    }
+    if (isRenaming) {
+      var layerNameInputHtml = pskl.utils.Template.replace(this.layerNameInputTemplate_, {
+        'layername' : layer.getName()
+      });
+      var layerNameInput = pskl.utils.Template.createFromHTML(layerNameInputHtml);
+      var layerNameEl = layerItem.querySelector('.layer-name');
+      layerItem.replaceChild(layerNameInput, layerNameEl);
+      layerNameInput.removeEventListener('blur', this.onRenameInput_);
+      layerNameInput.removeEventListener('keydown', this.onRenameInput_);
+      layerNameInput.addEventListener('blur', this.onRenameInput_);
+      layerNameInput.addEventListener('keydown', this.onRenameInput_);
+      layerNameInput.focus();
+      layerNameInput.select();
+    }
+    var opacity = layer.getOpacity();
+    if (opacity == 1) {
+      layerItem.querySelector('.layer-item-opacity').style.color = '#ffd700';
+    } else if (opacity == 0) {
+      layerItem.querySelector('.layer-item-opacity').style.color = '#969696';
+    } else {
+      layerItem.querySelector('.layer-item-opacity').style.color = '#ffffff';
     }
   };
 
@@ -128,8 +169,13 @@
     if (el.classList.contains('button')) {
       this.onButtonClick_(el, evt);
     } else if (el.classList.contains('layer-name')) {
+      var currentIndex = this.piskelController.getCurrentLayerIndex();
       index = pskl.utils.Dom.getData(el, 'layerIndex');
-      this.piskelController.setCurrentLayerIndex(parseInt(index, 10));
+      if (index != currentIndex) {
+        var currentItem = el.parentElement.parentElement.querySelector('.current-layer-item');
+        currentItem.removeEventListener('dblclick', this.startRenamingCurrentLayer_);
+        this.piskelController.setCurrentLayerIndex(parseInt(index, 10));
+      }
     } else if (el.classList.contains('layer-item-opacity')) {
       index = pskl.utils.Dom.getData(el, 'layerIndex');
       var layer = this.piskelController.getLayerAt(parseInt(index, 10));
@@ -138,16 +184,31 @@
     }
   };
 
-  ns.LayersListController.prototype.renameCurrentLayer_ = function () {
-    var layer = this.piskelController.getCurrentLayer();
-    var name = window.prompt('Please enter the layer name', layer.getName());
-    if (name) {
-      var index = this.piskelController.getCurrentLayerIndex();
-      this.piskelController.renameLayerAt(index, name);
-      this.renderLayerList_();
+  ns.LayersListController.prototype.startRenamingCurrentLayer_ = function () {
+    this.isRenaming = true;
+    this.renderLayerList_();
+  };
+
+  ns.LayersListController.prototype.onRenameInput_ = function (evt) {
+    var el = evt.target || evt.srcElement;
+    if (evt.key === 'Enter') {
+      this.finishRenamingCurrentLayer_(el, el.value);
+    } else if (!evt.key || evt.key === 'Escape') {
+      this.finishRenamingCurrentLayer_(el);
     }
   };
 
+  ns.LayersListController.prototype.finishRenamingCurrentLayer_ = function (input, newName) {
+    if (newName) {
+      var index = this.piskelController.getCurrentLayerIndex();
+      this.piskelController.renameLayerAt(index, newName);
+    }
+    input.removeEventListener('blur', this.onRenameInput_);
+    input.removeEventListener('keydown', this.onRenameInput_);
+    this.isRenaming = false;
+    this.renderLayerList_();
+  };
+
   ns.LayersListController.prototype.mergeDownCurrentLayer_ = function () {
     var index = this.piskelController.getCurrentLayerIndex();
     this.piskelController.mergeDownLayerAt(index);
@@ -157,9 +218,9 @@
   ns.LayersListController.prototype.onButtonClick_ = function (button, evt) {
     var action = button.getAttribute('data-action');
     if (action == 'up') {
-      this.piskelController.moveLayerUp();
+      this.piskelController.moveLayerUp(evt.shiftKey);
     } else if (action == 'down') {
-      this.piskelController.moveLayerDown();
+      this.piskelController.moveLayerDown(evt.shiftKey);
     } else if (action == 'add') {
       if (evt.shiftKey) {
         this.piskelController.duplicateCurrentLayer();
@@ -171,7 +232,7 @@
     } else if (action == 'merge') {
       this.mergeDownCurrentLayer_();
     } else if (action == 'edit') {
-      this.renameCurrentLayer_();
+      this.startRenamingCurrentLayer_();
     }
   };
 

src/js/controller/MinimapController.js

@@ -16,14 +16,14 @@
     this.minimapEl = document.createElement('DIV');
     this.minimapEl.className = 'minimap-crop-frame';
     this.minimapEl.style.display = 'none';
-    $(this.container).append(this.minimapEl);
+    this.container.appendChild(this.minimapEl);
 
     // Init mouse events
-    $(this.container).mousedown(this.onMinimapMousedown_.bind(this));
-    $('body').mousemove(this.onMinimapMousemove_.bind(this));
-    $('body').mouseup(this.onMinimapMouseup_.bind(this));
+    this.container.addEventListener('mousedown', this.onMinimapMousedown_.bind(this));
+    document.body.addEventListener('mousemove', this.onMinimapMousemove_.bind(this));
+    document.body.addEventListener('mouseup', this.onMinimapMouseup_.bind(this));
 
-    $.subscribe(Events.ZOOM_CHANGED, $.proxy(this.renderMinimap_, this));
+    $.subscribe(Events.ZOOM_CHANGED, this.renderMinimap_.bind(this));
   };
 
   ns.MinimapController.prototype.renderMinimap_ = function () {
@@ -40,8 +40,9 @@
     var minimapSize = this.getMinimapSize_();
     var previewSize = this.getPreviewSize_();
 
-    var containerHeight = this.container.height();
-    var containerWidth = this.container.width();
+    var containerRect = this.container.getBoundingClientRect();
+    var containerHeight = containerRect.height;
+    var containerWidth = containerRect.width;
 
     // offset(x, y) in frame pixels
     var offset = this.drawingController.getRenderer().getOffset();
@@ -60,7 +61,7 @@
     this.minimapEl.style.display = 'block';
     this.minimapEl.style.width = Math.min(minimapSize.width, containerWidth) + 'px';
     this.minimapEl.style.height = Math.min(minimapSize.height, containerHeight) + 'px';
-    this.minimapEl.style.left = Math.max(0, left) +  'px';
+    this.minimapEl.style.left = (Math.max(0, left) + Constants.RIGHT_COLUMN_PADDING_LEFT) +  'px';
     this.minimapEl.style.top = Math.max(0, top) +  'px';
 
     this.isVisible = true;

src/js/controller/NotificationController.js

@@ -7,8 +7,8 @@
    * @public
    */
   ns.NotificationController.prototype.init = function() {
-    $.subscribe(Events.SHOW_NOTIFICATION, $.proxy(this.displayMessage_, this));
-    $.subscribe(Events.HIDE_NOTIFICATION, $.proxy(this.removeMessage_, this));
+    $.subscribe(Events.SHOW_NOTIFICATION, this.displayMessage_.bind(this));
+    $.subscribe(Events.HIDE_NOTIFICATION, this.removeMessage_.bind(this));
   };
 
   /**
@@ -35,9 +35,9 @@
    * @private
    */
   ns.NotificationController.prototype.removeMessage_ = function (evt) {
-    var message = $('#user-message');
-    if (message.length) {
-      message.remove();
+    var message = document.querySelector('#user-message');
+    if (message) {
+      message.parentNode.removeChild(message);
     }
   };
 })();

src/js/controller/PaletteController.js

@@ -35,24 +35,24 @@
     // Initialize colorpickers:
     var colorPicker = $('#color-picker');
     colorPicker.spectrum($.extend({color: Constants.DEFAULT_PEN_COLOR}, spectrumCfg));
-    colorPicker.change({isPrimary : true}, $.proxy(this.onPickerChange_, this));
-    this.setTitleOnPicker_(Constants.DEFAULT_PEN_COLOR, colorPicker);
+    colorPicker.change({isPrimary : true}, this.onPickerChange_.bind(this));
+    this.setTitleOnPicker_(Constants.DEFAULT_PEN_COLOR, colorPicker.get(0));
 
     var secondaryColorPicker = $('#secondary-color-picker');
     secondaryColorPicker.spectrum($.extend({color: Constants.TRANSPARENT_COLOR}, spectrumCfg));
-    secondaryColorPicker.change({isPrimary : false}, $.proxy(this.onPickerChange_, this));
-    this.setTitleOnPicker_(Constants.TRANSPARENT_COLOR, secondaryColorPicker);
+    secondaryColorPicker.change({isPrimary : false}, this.onPickerChange_.bind(this));
+    this.setTitleOnPicker_(Constants.TRANSPARENT_COLOR, secondaryColorPicker.get(0));
 
-    var swapColorsIcon = $('.swap-colors-button');
-    swapColorsIcon.click(this.swapColors.bind(this));
+    var swapColorsIcon = document.querySelector('.swap-colors-button');
+    swapColorsIcon.addEventListener('click', this.swapColors.bind(this));
   };
 
   /**
    * @private
    */
-  ns.PaletteController.prototype.onPickerChange_ = function(evt, isPrimary) {
-    var inputPicker = $(evt.target);
-    var color = inputPicker.val();
+  ns.PaletteController.prototype.onPickerChange_ = function(evt) {
+    var inputPicker = evt.target;
+    var color = inputPicker.value;
 
     if (color != Constants.TRANSPARENT_COLOR) {
       // Unless the color is TRANSPARENT_COLOR, format it to hexstring, as
@@ -71,7 +71,6 @@
    * @private
    */
   ns.PaletteController.prototype.onColorSelected_ = function(args, evt, color) {
-    var inputPicker = $(evt.target);
     if (args.isPrimary) {
       this.setPrimaryColor_(color);
     } else {
@@ -80,12 +79,12 @@
   };
 
   ns.PaletteController.prototype.setPrimaryColor_ = function (color) {
-    this.updateColorPicker_(color, $('#color-picker'));
+    this.updateColorPicker_(color, document.querySelector('#color-picker'));
     $.publish(Events.PRIMARY_COLOR_SELECTED, [color]);
   };
 
   ns.PaletteController.prototype.setSecondaryColor_ = function (color) {
-    this.updateColorPicker_(color, $('#secondary-color-picker'));
+    this.updateColorPicker_(color, document.querySelector('#secondary-color-picker'));
     $.publish(Events.SECONDARY_COLOR_SELECTED, [color]);
   };
 
@@ -104,6 +103,7 @@
    * @private
    */
   ns.PaletteController.prototype.updateColorPicker_ = function (color, colorPicker) {
+    var jqueryColorPicker = $(colorPicker);
     if (color == Constants.TRANSPARENT_COLOR) {
       // We can set the current palette color to transparent.
       // You can then combine this transparent color with an advanced
@@ -114,17 +114,17 @@
       // The colorpicker can't be set to a transparent state.
       // We set its background to white and insert the
       // string "TRANSPARENT" to mimic this state:
-      colorPicker.spectrum('set', Constants.TRANSPARENT_COLOR);
-      colorPicker.val(Constants.TRANSPARENT_COLOR);
+      jqueryColorPicker.spectrum('set', Constants.TRANSPARENT_COLOR);
+      colorPicker.value = Constants.TRANSPARENT_COLOR;
     } else {
-      colorPicker.spectrum('set', color);
+      jqueryColorPicker.spectrum('set', color);
     }
     this.setTitleOnPicker_(color, colorPicker);
   };
 
   ns.PaletteController.prototype.setTitleOnPicker_ = function (title, colorPicker) {
-    var parent = colorPicker.parent();
-    title = parent.data('initial-title') + '<br/>' + title;
-    parent.attr('data-original-title', title);
+    var parent = colorPicker.parentNode;
+    title = parent.dataset.initialTitle + '<br/>' + title;
+    parent.dataset.originalTitle = title;
   };
 })();

src/js/controller/PalettesListController.js

@@ -29,7 +29,7 @@
     $.subscribe(Events.CURRENT_COLORS_UPDATED, this.fillColorListContainer.bind(this));
     $.subscribe(Events.PRIMARY_COLOR_SELECTED, this.highlightSelectedColors.bind(this));
     $.subscribe(Events.SECONDARY_COLOR_SELECTED, this.highlightSelectedColors.bind(this));
-    $.subscribe(Events.USER_SETTINGS_CHANGED, $.proxy(this.onUserSettingsChange_, this));
+    $.subscribe(Events.USER_SETTINGS_CHANGED, this.onUserSettingsChange_.bind(this));
 
     var shortcuts = pskl.service.keyboard.Shortcuts;
     pskl.app.shortcutService.registerShortcut(shortcuts.COLOR.PREVIOUS_COLOR, this.selectPreviousColor_.bind(this));
@@ -51,12 +51,17 @@
   };
 
   ns.PalettesListController.prototype.fillColorListContainer = function () {
-
     var colors = this.getSelectedPaletteColors_();
 
     if (colors.length > 0) {
-      var html = colors.map(function (color, index) {
-        return pskl.utils.Template.replace(this.paletteColorTemplate_, {color : color, index : index});
+      var html = colors.filter(function (color) {
+        return !!color;
+      }).map(function (color, index) {
+        return pskl.utils.Template.replace(this.paletteColorTemplate_, {
+          color : color,
+          index : index + 1,
+          title : color.toUpperCase()
+        });
       }.bind(this)).join('');
       this.colorListContainer_.innerHTML = html;
 
@@ -64,6 +69,10 @@
     } else {
       this.colorListContainer_.innerHTML = pskl.utils.Template.get('palettes-list-no-colors-partial');
     }
+
+    // If we have more than 10 colors, use tiny mode, where 10 colors will fit on the same
+    // line.
+    this.colorListContainer_.classList.toggle('tiny', colors.length > 10);
   };
 
   ns.PalettesListController.prototype.selectPalette = function (paletteId) {
@@ -101,7 +110,7 @@
     var currentIndex = 0;
     var selectedColor = document.querySelector('.' + PRIMARY_COLOR_CLASSNAME);
     if (selectedColor) {
-      currentIndex = parseInt(selectedColor.dataset.colorIndex, 10);
+      currentIndex = parseInt(selectedColor.dataset.colorIndex, 10) - 1;
     }
     return currentIndex;
   };

src/js/controller/PenSizeController.js

@@ -1,23 +1,19 @@
 (function () {
   var ns = $.namespace('pskl.controller');
 
-  ns.PenSizeController = function () {};
+  ns.PenSizeController = function () {
+    this.sizePicker = new pskl.widgets.SizePicker(this.onSizePickerChanged_.bind(this));
+  };
 
   ns.PenSizeController.prototype.init = function () {
-    this.container = document.querySelector('.pen-size-container');
-    pskl.utils.Event.addEventListener(this.container, 'click', this.onPenSizeOptionClick_, this);
+    this.sizePicker.init(document.querySelector('.pen-size-container'));
 
     $.subscribe(Events.PEN_SIZE_CHANGED, this.onPenSizeChanged_.bind(this));
-
     this.updateSelectedOption_();
   };
 
-  ns.PenSizeController.prototype.onPenSizeOptionClick_ = function (e) {
-    var size = e.target.dataset.size;
-    if (!isNaN(size)) {
-      size = parseInt(size, 10);
-      pskl.app.penSizeService.setPenSize(size);
-    }
+  ns.PenSizeController.prototype.onSizePickerChanged_ = function (size) {
+    pskl.app.penSizeService.setPenSize(size);
   };
 
   ns.PenSizeController.prototype.onPenSizeChanged_ = function (e) {
@@ -25,19 +21,7 @@
   };
 
   ns.PenSizeController.prototype.updateSelectedOption_ = function () {
-    pskl.utils.Dom.removeClass('labeled', this.container);
-    pskl.utils.Dom.removeClass('selected', this.container);
     var size = pskl.app.penSizeService.getPenSize();
-    var selectedOption;
-    if (size <= 4) {
-      selectedOption = this.container.querySelector('[data-size="' + size + '"]');
-    } else {
-      selectedOption = this.container.querySelector('[data-size="4"]');
-      selectedOption.classList.add('labeled');
-      selectedOption.setAttribute('real-pen-size', size);
-    }
-    if (selectedOption) {
-      selectedOption.classList.add('selected');
-    }
+    this.sizePicker.setSize(size);
   };
 })();

src/js/controller/ProgressBarController.js

@@ -10,9 +10,9 @@
   };
 
   ns.ProgressBarController.prototype.init = function () {
-    $.subscribe(Events.SHOW_PROGRESS, $.proxy(this.showProgress_, this));
-    $.subscribe(Events.UPDATE_PROGRESS, $.proxy(this.updateProgress_, this));
-    $.subscribe(Events.HIDE_PROGRESS, $.proxy(this.hideProgress_, this));
+    $.subscribe(Events.SHOW_PROGRESS, this.showProgress_.bind(this));
+    $.subscribe(Events.UPDATE_PROGRESS, this.updateProgress_.bind(this));
+    $.subscribe(Events.HIDE_PROGRESS, this.hideProgress_.bind(this));
   };
 
   ns.ProgressBarController.prototype.showProgress_ = function (event, progressInfo) {

src/js/controller/ToolController.js

@@ -35,7 +35,8 @@
     // Set SimplePen as default selected tool:
     this.selectTool_(this.tools[0]);
     // Activate listener on tool panel:
-    $('#tool-section').mousedown($.proxy(this.onToolIconClicked_, this));
+    var toolSection = document.querySelector('#tool-section');
+    toolSection.addEventListener('mousedown', this.onToolIconClicked_.bind(this));
 
     $.subscribe(Events.SELECT_TOOL, this.onSelectToolEvent_.bind(this));
     $.subscribe(Events.SHORTCUTS_CHANGED, this.createToolsDom_.bind(this));
@@ -45,14 +46,14 @@
    * @private
    */
   ns.ToolController.prototype.activateToolOnStage_ = function(tool) {
-    var stage = $('body');
-    var previousSelectedToolClass = stage.data('selected-tool-class');
+    var stage = document.body;
+    var previousSelectedToolClass = stage.dataset.selectedToolClass;
     if (previousSelectedToolClass) {
-      stage.removeClass(previousSelectedToolClass);
-      stage.removeClass(pskl.tools.drawing.Move.TOOL_ID);
+      stage.classList.remove(previousSelectedToolClass);
+      stage.classList.remove(pskl.tools.drawing.Move.TOOL_ID);
     }
-    stage.addClass(tool.toolId);
-    stage.data('selected-tool-class', tool.toolId);
+    stage.classList.add(tool.toolId);
+    stage.dataset.selectedToolClass = tool.toolId;
   };
 
   ns.ToolController.prototype.onSelectToolEvent_ = function(event, toolId) {
@@ -69,11 +70,13 @@
     this.currentSelectedTool = tool;
     this.activateToolOnStage_(this.currentSelectedTool);
 
-    var selectedToolElement = $('#tool-section .tool-icon.selected');
-    var toolElement = $('[data-tool-id=' + tool.toolId + ']');
+    var selectedToolElement = document.querySelector('#tool-section .tool-icon.selected');
+    if (selectedToolElement) {
+      selectedToolElement.classList.remove('selected');
+    }
 
-    selectedToolElement.removeClass('selected');
-    toolElement.addClass('selected');
+    var toolElement = document.querySelector('[data-tool-id=' + tool.toolId + ']');
+    toolElement.classList.add('selected');
 
     $.publish(Events.TOOL_SELECTED, [tool]);
   };
@@ -82,11 +85,11 @@
    * @private
    */
   ns.ToolController.prototype.onToolIconClicked_ = function(evt) {
-    var target = $(evt.target);
-    var clickedTool = target.closest('.tool-icon');
+    var target = evt.target;
+    var clickedTool = pskl.utils.Dom.getParentWithData(target, 'toolId');
 
-    if (clickedTool.length) {
-      var toolId = clickedTool.data().toolId;
+    if (clickedTool) {
+      var toolId = clickedTool.dataset.toolId;
       var tool = this.getToolById_(toolId);
       if (tool) {
         this.selectTool_(tool);
@@ -116,7 +119,7 @@
       var tool = this.tools[i];
       html += this.toolIconBuilder.createIcon(tool);
     }
-    $('#tools-container').html(html);
+    document.querySelector('#tools-container').innerHTML = html;
   };
 
   ns.ToolController.prototype.addKeyboardShortcuts_ = function () {

src/js/controller/TransformationsController.js

@@ -1,22 +1,30 @@
 (function () {
   var ns = $.namespace('pskl.controller');
+  var SHOW_MORE_CLASS = 'show-more';
 
   ns.TransformationsController = function () {
     this.tools = [
       new pskl.tools.transform.Flip(),
       new pskl.tools.transform.Rotate(),
       new pskl.tools.transform.Clone(),
-      new pskl.tools.transform.Center()
+      new pskl.tools.transform.Center(),
+      new pskl.tools.transform.Crop(),
     ];
 
     this.toolIconBuilder = new pskl.tools.ToolIconBuilder();
   };
 
   ns.TransformationsController.prototype.init = function () {
-    var container = document.querySelector('.transformations-container');
-    this.toolsContainer = container.querySelector('.tools-wrapper');
-    container.addEventListener('click', this.onTransformationClick_.bind(this));
+    this.container = document.querySelector('.transformations-container');
+    this.container.addEventListener('click', this.onTransformationClick_.bind(this));
+
+    this.showMoreLink = this.container.querySelector('.transformations-show-more-link');
+    this.showMoreLink.addEventListener('click', this.toggleShowMoreTools_.bind(this));
+
     this.createToolsDom_();
+    this.updateShowMoreLink_();
+
+    $.subscribe(Events.USER_SETTINGS_CHANGED, this.onUserSettingsChange_.bind(this));
   };
 
   ns.TransformationsController.prototype.applyTool = function (toolId, evt) {
@@ -30,13 +38,35 @@
 
   ns.TransformationsController.prototype.onTransformationClick_ = function (evt) {
     var toolId = evt.target.dataset.toolId;
-    this.applyTool(toolId, evt);
+    if (toolId) {
+      this.applyTool(toolId, evt);
+    }
+  };
+
+  ns.TransformationsController.prototype.toggleShowMoreTools_ = function (evt) {
+    var showMore = pskl.UserSettings.get(pskl.UserSettings.TRANSFORM_SHOW_MORE);
+    pskl.UserSettings.set(pskl.UserSettings.TRANSFORM_SHOW_MORE, !showMore);
+  };
+
+  ns.TransformationsController.prototype.onUserSettingsChange_ = function (evt, settingName) {
+    if (settingName == pskl.UserSettings.TRANSFORM_SHOW_MORE) {
+      this.updateShowMoreLink_();
+    }
+  };
+
+  ns.TransformationsController.prototype.updateShowMoreLink_ = function () {
+    var showMoreEnabled = pskl.UserSettings.get(pskl.UserSettings.TRANSFORM_SHOW_MORE);
+    this.container.classList.toggle(SHOW_MORE_CLASS, showMoreEnabled);
+
+    // Hide the link in case there are 4 or less tools available.
+    this.showMoreLink.classList.toggle('hidden', this.tools.length < 5);
   };
 
   ns.TransformationsController.prototype.createToolsDom_ = function() {
     var html = this.tools.reduce(function (p, tool) {
       return p + this.toolIconBuilder.createIcon(tool, 'left');
     }.bind(this), '');
-    this.toolsContainer.innerHTML = html;
+    var toolsContainer = this.container.querySelector('.tools-wrapper');
+    toolsContainer.innerHTML = html;
   };
 })();

src/js/controller/dialogs/BrowseLocalController.js

@@ -10,13 +10,12 @@
 
     this.localStorageItemTemplate_ = pskl.utils.Template.get('local-storage-item-template');
 
-    this.service_ = pskl.app.localStorageService;
-    this.piskelList = $('.local-piskel-list');
-    this.prevSessionContainer = $('.previous-session');
+    this.service_ = pskl.app.indexedDbStorageService;
+    this.piskelList = document.querySelector('.local-piskel-list');
 
     this.fillLocalPiskelsList_();
 
-    this.piskelList.click(this.onPiskelsListClick_.bind(this));
+    this.piskelList.addEventListener('click', this.onPiskelsListClick_.bind(this));
   };
 
   ns.BrowseLocalController.prototype.onPiskelsListClick_ = function (evt) {
@@ -36,24 +35,24 @@
   };
 
   ns.BrowseLocalController.prototype.fillLocalPiskelsList_ = function () {
-    var html = '';
-    var keys = this.service_.getKeys();
-
-    keys.sort(function (k1, k2) {
-      if (k1.date < k2.date) {return 1;}
-      if (k1.date > k2.date) {return -1;}
-      return 0;
-    });
-
-    keys.forEach((function (key) {
-      var date = pskl.utils.DateUtils.format(key.date, '{{Y}}/{{M}}/{{D}} {{H}}:{{m}}');
-      html += pskl.utils.Template.replace(this.localStorageItemTemplate_, {
-        name : key.name,
-        date : date
+    this.service_.getKeys().then(function (keys) {
+      var html = '';
+      keys.sort(function (k1, k2) {
+        if (k1.date < k2.date) {return 1;}
+        if (k1.date > k2.date) {return -1;}
+        return 0;
       });
-    }).bind(this));
 
-    var tableBody_ = this.piskelList.get(0).tBodies[0];
-    tableBody_.innerHTML = html;
+      keys.forEach((function (key) {
+        var date = pskl.utils.DateUtils.format(key.date, '{{Y}}/{{M}}/{{D}} {{H}}:{{m}}');
+        html += pskl.utils.Template.replace(this.localStorageItemTemplate_, {
+          name : key.name,
+          date : date
+        });
+      }).bind(this));
+
+      var tableBody_ = this.piskelList.tBodies[0];
+      tableBody_.innerHTML = html;
+    }.bind(this));
   };
 })();

src/js/controller/dialogs/DialogsController.js

@@ -25,6 +25,10 @@
     'unsupported-browser' : {
       template : 'templates/dialogs/unsupported-browser.html',
       controller : ns.UnsupportedBrowserController
+    },
+    'browse-backups' : {
+      template : 'templates/dialogs/browse-backups.html',
+      controller : ns.backups.BrowseBackups
     }
   };
 

src/js/controller/dialogs/backups/BrowseBackups.js

@@ -0,0 +1,81 @@
+(function () {
+  var ns = $.namespace('pskl.controller.dialogs.backups');
+
+  var stepDefinitions = {
+    'SELECT_SESSION' : {
+      controller : ns.steps.SelectSession,
+      template : 'backups-select-session'
+    },
+    'SESSION_DETAILS' : {
+      controller : ns.steps.SessionDetails,
+      template : 'backups-session-details'
+    },
+  };
+
+  ns.BrowseBackups = function (piskelController, args) {
+    this.piskelController = piskelController;
+
+    // Backups data object used by steps to communicate and share their
+    // results.
+    this.backupsData = {
+      sessions: [],
+      selectedSession : null
+    };
+  };
+
+  pskl.utils.inherit(ns.BrowseBackups, pskl.controller.dialogs.AbstractDialogController);
+
+  ns.BrowseBackups.prototype.init = function () {
+    this.superclass.init.call(this);
+
+    // Prepare wizard steps.
+    this.steps = this.createSteps_();
+
+    // Start wizard widget.
+    var wizardContainer = document.querySelector('.backups-wizard-container');
+    this.wizard = new pskl.widgets.Wizard(this.steps, wizardContainer);
+    this.wizard.init();
+
+    this.wizard.goTo('SELECT_SESSION');
+  };
+
+  ns.BrowseBackups.prototype.back = function () {
+    this.wizard.back();
+    this.wizard.getCurrentStep().instance.onShow();
+  };
+
+  ns.BrowseBackups.prototype.next = function () {
+    var step = this.wizard.getCurrentStep();
+    if (step.name === 'SELECT_SESSION') {
+      this.wizard.goTo('SESSION_DETAILS');
+    }
+  };
+
+  ns.BrowseBackups.prototype.destroy = function (file) {
+    Object.keys(this.steps).forEach(function (stepName) {
+      var step = this.steps[stepName];
+      step.instance.destroy();
+      step.instance = null;
+      step.el = null;
+    }.bind(this));
+
+    this.superclass.destroy.call(this);
+  };
+
+  ns.BrowseBackups.prototype.createSteps_ = function () {
+    var steps = {};
+    Object.keys(stepDefinitions).forEach(function (stepName) {
+      var definition = stepDefinitions[stepName];
+      var el = pskl.utils.Template.getAsHTML(definition.template);
+      var instance = new definition.controller(this.piskelController, this, el);
+      instance.init();
+      steps[stepName] = {
+        name: stepName,
+        el: el,
+        instance: instance
+      };
+    }.bind(this));
+
+    return steps;
+  };
+})();

src/js/controller/dialogs/backups/steps/SelectSession.js

@@ -0,0 +1,101 @@
+(function () {
+  var ns = $.namespace('pskl.controller.dialogs.backups.steps');
+
+  // Should match the transition duration for.session-item defined in dialogs-browse-backups.css
+  var DELETE_TRANSITION_DURATION = 500;
+  /**
+   * Helper that returns a promise that will resolve after waiting for a
+   * given time (in ms).
+   *
+   * @param {Number} time
+   *        The time to wait.
+   * @return {Promise} promise that resolves after time.
+   */
+  var wait = function (time) {
+    var deferred = Q.defer();
+    setTimeout(function () {
+      deferred.resolve();
+    }, time);
+    return deferred.promise;
+  };
+
+  ns.SelectSession = function (piskelController, backupsController, container) {
+    this.piskelController = piskelController;
+    this.backupsController = backupsController;
+    this.container = container;
+  };
+
+  ns.SelectSession.prototype.addEventListener = function (el, type, cb) {
+    pskl.utils.Event.addEventListener(el, type, cb, this);
+  };
+
+  ns.SelectSession.prototype.init = function () {
+    this.addEventListener(this.container, 'click', this.onContainerClick_);
+  };
+
+  ns.SelectSession.prototype.onShow = function () {
+    this.update();
+  };
+
+  ns.SelectSession.prototype.update = function () {
+    pskl.app.backupService.list().then(function (sessions) {
+      var html = this.getMarkupForSessions_(sessions);
+      this.container.querySelector('.session-list').innerHTML = html;
+    }.bind(this)).catch(function () {
+      var html = pskl.utils.Template.get('session-list-error');
+      this.container.querySelector('.session-list').innerHTML = html;
+    }.bind(this));
+  };
+
+  ns.SelectSession.prototype.getMarkupForSessions_ = function (sessions) {
+    if (sessions.length === 0) {
+      return pskl.utils.Template.get('session-list-empty');
+    }
+
+    var sessionItemTemplate = pskl.utils.Template.get('session-list-item');
+    return sessions.reduce(function (previous, session) {
+      if (session.id === pskl.app.sessionId) {
+        // Do not show backups for the current session.
+        return previous;
+      }
+      var view = {
+        id: session.id,
+        name: session.name,
+        description: session.description ? '- ' + session.description : '',
+        date: pskl.utils.DateUtils.format(session.endDate, 'the {{Y}}/{{M}}/{{D}} at {{H}}:{{m}}'),
+        count: session.count === 1 ? '1 snapshot' : session.count + ' snapshots'
+      };
+      return previous + pskl.utils.Template.replace(sessionItemTemplate, view);
+    }, '');
+  };
+
+  ns.SelectSession.prototype.destroy = function () {
+    pskl.utils.Event.removeAllEventListeners(this);
+  };
+
+  ns.SelectSession.prototype.onContainerClick_ = function (evt) {
+    var sessionId = evt.target.dataset.sessionId;
+    if (!sessionId) {
+      return;
+    }
+
+    var action = evt.target.dataset.action;
+    if (action == 'view') {
+      this.backupsController.backupsData.selectedSession = sessionId;
+      this.backupsController.next();
+    } else if (action == 'delete') {
+      if (window.confirm('Are you sure you want to delete this session?')) {
+        evt.target.closest('.session-item').classList.add('deleting');
+        Q.all([
+          pskl.app.backupService.deleteSession(sessionId),
+          // Wait for 500ms for the .hide opacity transition.
+          wait(DELETE_TRANSITION_DURATION)
+        ]).then(function () {
+          // Refresh the list of sessions
+          this.update();
+        }.bind(this));
+      }
+    }
+  };
+
+})();

src/js/controller/dialogs/backups/steps/SessionDetails.js

@@ -0,0 +1,102 @@
+(function () {
+  var ns = $.namespace('pskl.controller.dialogs.backups.steps');
+
+  // Should match the preview dimensions defined in dialogs-browse-backups.css
+  var PREVIEW_SIZE = 60;
+
+  ns.SessionDetails = function (piskelController, backupsController, container) {
+    this.piskelController = piskelController;
+    this.backupsController = backupsController;
+    this.container = container;
+  };
+
+  ns.SessionDetails.prototype.init = function () {
+    this.backButton = this.container.querySelector('.back-button');
+    this.addEventListener(this.backButton, 'click', this.onBackClick_);
+    this.addEventListener(this.container, 'click', this.onContainerClick_);
+  };
+
+  ns.SessionDetails.prototype.destroy = function () {
+    pskl.utils.Event.removeAllEventListeners(this);
+  };
+
+  ns.SessionDetails.prototype.addEventListener = function (el, type, cb) {
+    pskl.utils.Event.addEventListener(el, type, cb, this);
+  };
+
+  ns.SessionDetails.prototype.onShow = function () {
+    var sessionId = this.backupsController.backupsData.selectedSession;
+    pskl.app.backupService.getSnapshotsBySessionId(sessionId).then(function (snapshots) {
+      var html = this.getMarkupForSnapshots_(snapshots);
+      this.container.querySelector('.snapshot-list').innerHTML = html;
+
+      // Load the image of the first frame for each sprite and update the list.
+      snapshots.forEach(function (snapshot) {
+        this.updateSnapshotPreview_(snapshot);
+      }.bind(this));
+    }.bind(this)).catch(function () {
+      var html = pskl.utils.Template.get('snapshot-list-error');
+      this.container.querySelector('.snapshot-list').innerHTML = html;
+    }.bind(this));
+  };
+
+  ns.SessionDetails.prototype.getMarkupForSnapshots_ = function (snapshots) {
+    if (snapshots.length === 0) {
+      // This should normally never happen, all sessions have at least one snapshot and snapshots
+      // can not be individually deleted.
+      console.warn('Could not retrieve snapshots for a session');
+      return pskl.utils.Template.get('snapshot-list-empty');
+    }
+
+    var sessionItemTemplate = pskl.utils.Template.get('snapshot-list-item');
+    return snapshots.reduce(function (previous, snapshot) {
+      var view = {
+        id: snapshot.id,
+        name: snapshot.name,
+        description: snapshot.description ? '- ' + snapshot.description : '',
+        date: pskl.utils.DateUtils.format(snapshot.date, 'the {{Y}}/{{M}}/{{D}} at {{H}}:{{m}}'),
+        frames: snapshot.frames === 1 ? '1 frame' : snapshot.frames + ' frames',
+        resolution: pskl.utils.StringUtils.formatSize(snapshot.width, snapshot.height),
+        fps: snapshot.fps
+      };
+      return previous + pskl.utils.Template.replace(sessionItemTemplate, view);
+    }, '');
+  };
+
+  ns.SessionDetails.prototype.updateSnapshotPreview_ = function (snapshot) {
+    pskl.utils.serialization.Deserializer.deserialize(
+      JSON.parse(snapshot.serialized),
+      function (piskel) {
+        var selector = '.snapshot-item[data-snapshot-id="' + snapshot.id + '"] .snapshot-preview';
+        var previewContainer = this.container.querySelector(selector);
+        if (!previewContainer) {
+          return;
+        }
+        var image = this.getFirstFrameAsImage_(piskel);
+        previewContainer.appendChild(image);
+      }.bind(this)
+    );
+  };
+
+  ns.SessionDetails.prototype.getFirstFrameAsImage_ = function (piskel) {
+    var frame = pskl.utils.LayerUtils.mergeFrameAt(piskel.getLayers(), 0);
+    var wZoom = PREVIEW_SIZE / piskel.width;
+    var hZoom = PREVIEW_SIZE / piskel.height;
+    var zoom = Math.min(hZoom, wZoom);
+    return pskl.utils.FrameUtils.toImage(frame, zoom);
+  };
+
+  ns.SessionDetails.prototype.onBackClick_ = function () {
+    this.backupsController.back(this);
+  };
+
+  ns.SessionDetails.prototype.onContainerClick_ = function (evt) {
+    var action = evt.target.dataset.action;
+    if (action == 'load' && window.confirm(Constants.CONFIRM_OVERWRITE)) {
+      var snapshotId = evt.target.dataset.snapshotId * 1;
+      pskl.app.backupService.loadSnapshotById(snapshotId).then(function () {
+        $.publish(Events.DIALOG_HIDE);
+      });
+    }
+  };
+})();

src/js/controller/dialogs/importwizard/ImportWizard.js

@@ -80,7 +80,13 @@
     var step = this.wizard.getCurrentStep();
 
     if (step.name === 'IMAGE_IMPORT') {
-      this.wizard.goTo('SELECT_MODE');
+      if (this.piskelController.isEmpty()) {
+        // If the current sprite is empty finalize immediately and replace the current sprite.
+        this.mergeData.importMode = ns.steps.SelectMode.MODES.REPLACE;
+        this.finalizeImport_();
+      } else {
+        this.wizard.goTo('SELECT_MODE');
+      }
     } else if (step.name === 'SELECT_MODE') {
       if (this.mergeData.importMode === ns.steps.SelectMode.MODES.REPLACE) {
         this.finalizeImport_();
@@ -144,9 +150,7 @@
 
     if (mode === ns.steps.SelectMode.MODES.REPLACE) {
       // Replace the current piskel and close the dialog.
-      var message = 'This will replace your current animation,' +
-                      ' are you sure you want to continue?';
-      if (window.confirm(message)) {
+      if (window.confirm(Constants.CONFIRM_OVERWRITE)) {
         this.piskelController.setPiskel(piskel);
         this.closeDialog();
       }

src/js/controller/dialogs/importwizard/steps/AdjustSize.js

@@ -69,16 +69,15 @@
     var anchorInfo = this.container.querySelector('.import-resize-anchor-info');
     if (isBigger && keep) {
       anchorInfo.innerHTML = [
-        '<span class="import-resize-warning">',
-          'Imported content will be cropped!',
-        '</span>',
-        ' ',
-        'Select crop origin'
+        '<div class="import-resize-warning">',
+        '  Imported content will be cropped!',
+        '</div>',
+        'Select crop anchor:'
       ].join('');
     } else if (isBigger) {
-      anchorInfo.innerHTML = 'Select the anchor for resizing the canvas';
+      anchorInfo.innerHTML = 'Select resize anchor:';
     } else {
-      anchorInfo.innerHTML = 'Select where the import should be positioned';
+      anchorInfo.innerHTML = 'Select position anchor:';
     }
   };
 

src/js/controller/dialogs/importwizard/steps/ImageImport.js

@@ -42,12 +42,17 @@
     this.addEventListener(this.frameOffsetY, 'keyup', this.onFrameInputKeyUp_);
 
     pskl.utils.FileUtils.readImageFile(this.file_, this.onImageLoaded_.bind(this));
+
+    if (this.piskelController.isEmpty()) {
+      this.nextButton.textContent = 'import';
+    }
   };
 
   ns.ImageImport.prototype.onNextClick = function () {
     this.container.classList.add('import-image-loading');
     this.createPiskelFromImage().then(function (piskel) {
       this.mergeData.mergePiskel = piskel;
+      this.container.classList.remove('import-image-loading');
       this.superclass.onNextClick.call(this);
     }.bind(this)).catch(function (e) {
       console.error(e);
@@ -69,9 +74,9 @@
       {
         importType: this.getImportType_(),
         frameSizeX: this.getImportType_() === 'single' ?
-            this.resizeWidth.value : this.sanitizeInputValue_(this.frameSizeX, 1),
+          this.resizeWidth.value : this.sanitizeInputValue_(this.frameSizeX, 1),
         frameSizeY: this.getImportType_() === 'single' ?
-            this.resizeHeight.value : this.sanitizeInputValue_(this.frameSizeY, 1),
+          this.resizeHeight.value : this.sanitizeInputValue_(this.frameSizeY, 1),
         frameOffsetX: this.sanitizeInputValue_(this.frameOffsetX, 0),
         frameOffsetY: this.sanitizeInputValue_(this.frameOffsetY, 0),
         smoothing: !!this.smoothResize.checked,
@@ -257,9 +262,7 @@
         context.lineTo(maxWidth * scaleX, y * scaleY);
       }
 
-      // Set the line style to dashed
       context.lineWidth = 1;
-      // context.setLineDash([2, 1]);
       context.strokeStyle = 'gold';
       context.stroke();
 

src/js/controller/piskel/PiskelController.js

@@ -12,11 +12,15 @@
   /**
    * Set the current piskel. Will reset the selected frame and layer unless specified
    * @param {Object} piskel
-   * @param {Boolean} preserveState if true, keep the selected frame and layer
+   * @param {Object} options:
+   *                 preserveState {Boolean} if true, keep the selected frame and layer
+   *                 noSnapshot {Boolean} if true, do not save a snapshot in the piskel
+   *                            history for this call to setPiskel
    */
-  ns.PiskelController.prototype.setPiskel = function (piskel, preserveState) {
+  ns.PiskelController.prototype.setPiskel = function (piskel, options) {
     this.piskel = piskel;
-    if (!preserveState) {
+    options = options || {};
+    if (!options.preserveState) {
       this.currentLayerIndex = 0;
       this.currentFrameIndex = 0;
     }
@@ -118,6 +122,17 @@
       l.addFrameAt(this.createEmptyFrame_(), index);
     }.bind(this));
 
+    this.onFrameAddedAt_(index);
+  };
+
+  ns.PiskelController.prototype.onFrameAddedAt_ = function (index) {
+    this.piskel.hiddenFrames = this.piskel.hiddenFrames.map(function (hiddenIndex) {
+      if (hiddenIndex >= index) {
+        return hiddenIndex + 1;
+      }
+      return hiddenIndex;
+    });
+
     this.setCurrentFrameIndex(index);
   };
 
@@ -131,6 +146,15 @@
     this.getLayers().forEach(function (l) {
       l.removeFrameAt(index);
     });
+
+    // Update the array of hidden frames since some hidden indexes might have shifted.
+    this.piskel.hiddenFrames = this.piskel.hiddenFrames.map(function (hiddenIndex) {
+      if (hiddenIndex > index) {
+        return hiddenIndex - 1;
+      }
+      return hiddenIndex;
+    });
+
     // Current frame index is impacted if the removed frame was before the current frame
     if (this.currentFrameIndex >= index && this.currentFrameIndex > 0) {
       this.setCurrentFrameIndex(this.currentFrameIndex - 1);
@@ -145,13 +169,64 @@
     this.getLayers().forEach(function (l) {
       l.duplicateFrameAt(index);
     });
-    this.setCurrentFrameIndex(index + 1);
+    this.onFrameAddedAt_(index + 1);
+  };
+
+  /**
+   * Toggle frame visibility for the frame at the provided index.
+   * A visible frame will be included in the animated preview.
+   */
+  ns.PiskelController.prototype.toggleFrameVisibilityAt = function (index) {
+    var hiddenFrames = this.piskel.hiddenFrames;
+    if (hiddenFrames.indexOf(index) === -1) {
+      hiddenFrames.push(index);
+    } else {
+      hiddenFrames = hiddenFrames.filter(function (i) {
+        return i !== index;
+      });
+    }
+
+    // Keep the hiddenFrames array sorted.
+    this.piskel.hiddenFrames = hiddenFrames.sort();
   };
 
   ns.PiskelController.prototype.moveFrame = function (fromIndex, toIndex) {
     this.getLayers().forEach(function (l) {
       l.moveFrame(fromIndex, toIndex);
     });
+
+    // Update the array of hidden frames since some hidden indexes might have shifted.
+    this.piskel.hiddenFrames = this.piskel.hiddenFrames.map(function (index) {
+      if (index === fromIndex) {
+        return toIndex;
+      }
+
+      // All the frames between fromIndex and toIndex changed their index.
+      var isImpacted = index >= Math.min(fromIndex, toIndex) &&
+                       index <= Math.max(fromIndex, toIndex);
+      if (isImpacted) {
+        if (fromIndex < toIndex) {
+          // If the frame moved to a higher index, all impacted frames had their index
+          // reduced by 1.
+          return index - 1;
+        } else {
+          // Otherwise, they had their index increased by 1.
+          return index + 1;
+        }
+      }
+    });
+  };
+
+  ns.PiskelController.prototype.hasVisibleFrameAt = function (index) {
+    return this.piskel.hiddenFrames.indexOf(index) === -1;
+  };
+
+  ns.PiskelController.prototype.getVisibleFrameIndexes = function () {
+    return this.getCurrentLayer().getFrames().map(function (frame, index) {
+      return index;
+    }).filter(function (index) {
+      return this.piskel.hiddenFrames.indexOf(index) === -1;
+    }.bind(this));
   };
 
   ns.PiskelController.prototype.getFrameCount = function () {
@@ -233,8 +308,9 @@
   ns.PiskelController.prototype.duplicateCurrentLayer = function () {
     var layer = this.getCurrentLayer();
     var clone = pskl.utils.LayerUtils.clone(layer);
-    this.piskel.addLayer(clone);
-    this.setCurrentLayerIndex(this.piskel.getLayers().length - 1);
+    var currentLayerIndex = this.getCurrentLayerIndex();
+    this.piskel.addLayerAt(clone, currentLayerIndex + 1);
+    this.setCurrentLayerIndex(currentLayerIndex + 1);
   };
 
   ns.PiskelController.prototype.createLayer = function (name) {
@@ -246,9 +322,9 @@
       for (var i = 0 ; i < this.getFrameCount() ; i++) {
         layer.addFrame(this.createEmptyFrame_());
       }
-      this.piskel.addLayer(layer);
-      this.setCurrentLayerIndex(this.piskel.getLayers().length - 1);
-
+      var currentLayerIndex = this.getCurrentLayerIndex();
+      this.piskel.addLayerAt(layer, currentLayerIndex + 1);
+      this.setCurrentLayerIndex(currentLayerIndex + 1);
     } else {
       throw 'Layer name should be unique';
     }
@@ -258,15 +334,15 @@
     return this.piskel.getLayersByName(name).length > 0;
   };
 
-  ns.PiskelController.prototype.moveLayerUp = function () {
+  ns.PiskelController.prototype.moveLayerUp = function (toTop) {
     var layer = this.getCurrentLayer();
-    this.piskel.moveLayerUp(layer);
+    this.piskel.moveLayerUp(layer, toTop);
     this.selectLayer(layer);
   };
 
-  ns.PiskelController.prototype.moveLayerDown = function () {
+  ns.PiskelController.prototype.moveLayerDown = function (toBottom) {
     var layer = this.getCurrentLayer();
-    this.piskel.moveLayerDown(layer);
+    this.piskel.moveLayerDown(layer, toBottom);
     this.selectLayer(layer);
   };
 
@@ -292,4 +368,12 @@
   ns.PiskelController.prototype.serialize = function () {
     return pskl.utils.serialization.Serializer.serialize(this.piskel);
   };
+
+  /**
+   * Check if the current sprite is empty. Emptiness here means no pixel has been filled
+   * on any layer or frame for the current sprite.
+   */
+  ns.PiskelController.prototype.isEmpty = function () {
+    return pskl.app.currentColorsService.getCurrentColors().length === 0;
+  };
 })();

src/js/controller/piskel/PublicPiskelController.js

@@ -37,6 +37,7 @@
     this.saveWrap_('moveLayerDown', true);
     this.saveWrap_('removeCurrentLayer', true);
     this.saveWrap_('setLayerOpacityAt', true);
+    this.saveWrap_('toggleFrameVisibilityAt', true);
 
     var shortcuts = pskl.service.keyboard.Shortcuts;
     pskl.app.shortcutService.registerShortcut(shortcuts.MISC.PREVIOUS_FRAME, this.selectPreviousFrame.bind(this));
@@ -49,14 +50,25 @@
     return this.piskelController;
   };
 
-  ns.PublicPiskelController.prototype.setPiskel = function (piskel, preserveState) {
-    this.piskelController.setPiskel(piskel, preserveState);
+  /**
+   * Set the current piskel. Will reset the selected frame and layer unless specified
+   * @param {Object} piskel
+   * @param {Object} options:
+   *                 preserveState {Boolean} if true, keep the selected frame and layer
+   *                 noSnapshot {Boolean} if true, do not save a snapshot in the piskel
+   *                            history for this call to setPiskel
+   */
+  ns.PublicPiskelController.prototype.setPiskel = function (piskel, options) {
+    this.piskelController.setPiskel(piskel, options);
 
     $.publish(Events.FRAME_SIZE_CHANGED);
     $.publish(Events.PISKEL_RESET);
-    $.publish(Events.PISKEL_SAVE_STATE, {
-      type : pskl.service.HistoryService.SNAPSHOT
-    });
+
+    if (!options || !options.noSnapshot) {
+      $.publish(Events.PISKEL_SAVE_STATE, {
+        type : pskl.service.HistoryService.SNAPSHOT
+      });
+    }
   };
 
   ns.PublicPiskelController.prototype.resetWrap_ = function (methodName) {

src/js/controller/preview/PopupPreviewController.js

@@ -33,7 +33,7 @@
     pskl.utils.Event.addEventListener(this.popup, 'resize', this.onWindowResize_, this);
     pskl.utils.Event.addEventListener(this.popup, 'unload', this.onPopupClosed_, this);
     var container = this.popup.document.querySelector('.preview-container');
-    this.renderer = new pskl.rendering.frame.BackgroundImageFrameRenderer($(container));
+    this.renderer = new pskl.rendering.frame.BackgroundImageFrameRenderer(container);
     this.updateZoom_();
     this.renderFlag = true;
   };

src/js/controller/preview/PreviewActionsController.js

@@ -0,0 +1,232 @@
+(function () {
+  var ns = $.namespace('pskl.controller.preview');
+
+  ns.PreviewActionsController = function (previewController, container) {
+    this.previewController = previewController;
+    this.piskelController = previewController.piskelController;
+    this.container = container;
+
+    this.onionSkinShortcut = pskl.service.keyboard.Shortcuts.MISC.ONION_SKIN;
+    this.toggleGridShortcut = pskl.service.keyboard.Shortcuts.MISC.TOGGLE_GRID;
+
+    this.fpsRangeInput = document.querySelector('#preview-fps');
+    this.fpsCounterDisplay = document.querySelector('#display-fps');
+    this.openPopupPreview = document.querySelector('.open-popup-preview-button');
+    this.toggleGridButton = document.querySelector('.toggle-grid-button');
+    this.previewSizeDropdown = document.querySelector('.preview-drop-down');
+    this.previewSizes = {
+      original: {
+        button: document.querySelector('.original-size-button'),
+        shortcut: pskl.service.keyboard.Shortcuts.MISC.X1_PREVIEW,
+        tooltip: 'Original size preview'
+      },
+      best: {
+        button: document.querySelector('.best-size-button'),
+        shortcut: pskl.service.keyboard.Shortcuts.MISC.BEST_PREVIEW,
+        tooltip: 'Best size preview'
+      },
+      full: {
+        button: document.querySelector('.full-size-button'),
+        shortcut: pskl.service.keyboard.Shortcuts.MISC.FULL_PREVIEW,
+        tooltip: 'Full size preview'
+      }
+    };
+    this.toggleOnionSkinButton = document.querySelector('.preview-toggle-onion-skin');
+  };
+
+  ns.PreviewActionsController.prototype.init = function () {
+    this.fpsRangeInput.addEventListener('change', this.onFpsRangeInputUpdate_.bind(this));
+    this.fpsRangeInput.addEventListener('input', this.onFpsRangeInputUpdate_.bind(this));
+
+    var addEvent = pskl.utils.Event.addEventListener;
+    addEvent(this.toggleOnionSkinButton, 'click', this.toggleOnionSkin_, this);
+    addEvent(this.openPopupPreview, 'click', this.onOpenPopupPreviewClick_, this);
+    addEvent(this.toggleGridButton, 'click', this.toggleGrid_, this);
+
+    var registerShortcut = pskl.app.shortcutService.registerShortcut.bind(pskl.app.shortcutService);
+    registerShortcut(this.onionSkinShortcut, this.toggleOnionSkin_.bind(this));
+    registerShortcut(this.toggleGridShortcut, this.toggleGrid_.bind(this));
+
+    var onionSkinTooltip = pskl.utils.TooltipFormatter.format('Toggle onion skin', this.onionSkinShortcut);
+    this.toggleOnionSkinButton.setAttribute('title', onionSkinTooltip);
+
+    for (var size in this.previewSizes) {
+      if (this.previewSizes.hasOwnProperty(size)) {
+        var previewSize = this.previewSizes[size];
+        addEvent(previewSize.button, 'click', this.onChangePreviewSize_, this, size);
+        registerShortcut(previewSize.shortcut, this.onChangePreviewSize_.bind(this, size));
+        var tooltip = pskl.utils.TooltipFormatter.format(previewSize.tooltip, previewSize.shortcut);
+        previewSize.button.setAttribute('title', tooltip);
+      }
+    }
+
+    $.subscribe(Events.FRAME_SIZE_CHANGED, this.updatePreviewSizeButtons_.bind(this));
+    $.subscribe(Events.USER_SETTINGS_CHANGED, this.onUserSettingsChange_.bind(this));
+    $.subscribe(Events.FPS_CHANGED, this.updateFPS_.bind(this));
+    $.subscribe(Events.PISKEL_RESET, this.updateFPS_.bind(this));
+
+    this.updatePreviewSizeButtons_();
+    this.updateOnionSkinPreview_();
+    this.selectPreviewSizeButton_();
+    this.updateFPS_();
+    this.updateMaxFPS_();
+    this.updateToggleGridButton_();
+  };
+
+  ns.PreviewActionsController.prototype.updateToggleGridButton_ = function () {
+    var gridEnabled = pskl.UserSettings.get(pskl.UserSettings.GRID_ENABLED);
+    this.toggleGridButton.classList.toggle('icon-minimap-grid-white', !gridEnabled);
+    this.toggleGridButton.classList.toggle('icon-minimap-grid-gold', gridEnabled);
+    this.toggleGridButton.classList.toggle('preview-contextual-action-enabled', gridEnabled);
+  };
+
+  ns.PreviewActionsController.prototype.toggleGrid_ = function () {
+    var gridEnabled = pskl.UserSettings.get(pskl.UserSettings.GRID_ENABLED);
+    pskl.UserSettings.set(pskl.UserSettings.GRID_ENABLED, !gridEnabled);
+  };
+
+  ns.PreviewActionsController.prototype.updatePreviewSizeButtons_ = function () {
+    var fullZoom = this.previewController.getZoom();
+    var bestZoom = Math.floor(fullZoom);
+    var seamlessModeEnabled = pskl.UserSettings.get(pskl.UserSettings.SEAMLESS_MODE);
+
+    var validSizes;
+    if (fullZoom < 1) {
+      this.disablePreviewSizeWidget_('No other option available');
+      validSizes = ['full'];
+    } else if (fullZoom === 1) {
+      this.disablePreviewSizeWidget_('No other option available');
+      validSizes = ['original'];
+    } else if (seamlessModeEnabled) {
+      this.disablePreviewSizeWidget_('Disabled in tile mode');
+      validSizes = ['original'];
+    } else {
+      this.enablePreviewSizeWidget_();
+      if (fullZoom === bestZoom) {
+        // If the full zoom is the same as the best zoom, display the best option only as
+        // it gives the exact factor information.
+        validSizes = ['original', 'best'];
+      } else if (bestZoom === 1) {
+        // If best zoom is 1x, remove it as it is redundant with the original option.
+        validSizes = ['full', 'original'];
+      } else {
+        validSizes = ['full', 'original', 'best'];
+      }
+    }
+
+    // Update buttons content and status.
+    this.previewSizes.best.button.textContent = Math.floor(fullZoom) + 'x';
+    for (var size in this.previewSizes) {
+      if (this.previewSizes.hasOwnProperty(size)) {
+        var previewSize = this.previewSizes[size];
+        var isSizeEnabled = validSizes.indexOf(size) != -1;
+
+        // classList.toggle is not available on IE11.
+        if (isSizeEnabled) {
+          previewSize.button.classList.remove('preview-contextual-action-hidden');
+        } else {
+          previewSize.button.classList.add('preview-contextual-action-hidden');
+        }
+      }
+    }
+
+    // Update the selected preview size if the currently selected size is not valid.
+    var selectedSize = pskl.UserSettings.get(pskl.UserSettings.PREVIEW_SIZE);
+    if (validSizes.indexOf(selectedSize) === -1) {
+      this.onChangePreviewSize_(validSizes[0]);
+    }
+  };
+
+  ns.PreviewActionsController.prototype.enablePreviewSizeWidget_ = function () {
+    this.previewSizeDropdown.classList.remove('preview-drop-down-disabled');
+  };
+
+  ns.PreviewActionsController.prototype.disablePreviewSizeWidget_ = function (reason) {
+    // The .preview-disable-overlay is displayed on top of the preview size widget
+    document.querySelector('.preview-disable-overlay').setAttribute('data-original-title', reason);
+    this.previewSizeDropdown.classList.add('preview-drop-down-disabled');
+  };
+
+  ns.PreviewActionsController.prototype.onOpenPopupPreviewClick_ = function () {
+    this.previewController.openPopupPreview();
+  };
+
+  ns.PreviewActionsController.prototype.onChangePreviewSize_ = function (size) {
+    var previewSize = this.previewSizes[size];
+    var isEnabled = !previewSize.button.classList.contains('preview-contextual-action-hidden');
+    if (isEnabled) {
+      pskl.UserSettings.set(pskl.UserSettings.PREVIEW_SIZE, size);
+    }
+  };
+
+  ns.PreviewActionsController.prototype.onUserSettingsChange_ = function (evt, name, value) {
+    if (name == pskl.UserSettings.ONION_SKIN) {
+      this.updateOnionSkinPreview_();
+    } else if (name == pskl.UserSettings.MAX_FPS) {
+      this.updateMaxFPS_();
+    } else if (name === pskl.UserSettings.SEAMLESS_MODE) {
+      this.updatePreviewSizeButtons_();
+    } else if (name === pskl.UserSettings.GRID_ENABLED) {
+      this.updateToggleGridButton_();
+    } else {
+      this.selectPreviewSizeButton_();
+    }
+  };
+
+  ns.PreviewActionsController.prototype.updateOnionSkinPreview_ = function () {
+    var enabledClassname = 'preview-toggle-onion-skin-enabled';
+    var isEnabled = pskl.UserSettings.get(pskl.UserSettings.ONION_SKIN);
+
+    // classList.toggle is not available on IE11.
+    if (isEnabled) {
+      this.toggleOnionSkinButton.classList.add(enabledClassname);
+    } else {
+      this.toggleOnionSkinButton.classList.remove(enabledClassname);
+    }
+  };
+
+  ns.PreviewActionsController.prototype.selectPreviewSizeButton_ = function () {
+    var currentlySelected = document.querySelector('.size-button-selected');
+    if (currentlySelected) {
+      currentlySelected.classList.remove('size-button-selected');
+    }
+
+    var selectedSize = pskl.UserSettings.get(pskl.UserSettings.PREVIEW_SIZE);
+    var previewSize = this.previewSizes[selectedSize];
+    previewSize.button.classList.add('size-button-selected');
+  };
+
+  ns.PreviewActionsController.prototype.updateMaxFPS_ = function () {
+    var maxFps = pskl.UserSettings.get(pskl.UserSettings.MAX_FPS);
+    this.fpsRangeInput.setAttribute('max', maxFps);
+    this.piskelController.setFPS(Math.min(maxFps, this.piskelController.getFPS()));
+  };
+
+  /**
+   * Event handler triggered on 'input' or 'change' events.
+   */
+  ns.PreviewActionsController.prototype.onFpsRangeInputUpdate_ = function (evt) {
+    var fps = parseInt(this.fpsRangeInput.value, 10);
+    this.piskelController.setFPS(fps);
+    // blur only on 'change' events, as blurring on 'input' breaks on Firefox
+    if (evt.type === 'change') {
+      this.fpsRangeInput.blur();
+    }
+  };
+
+  ns.PreviewActionsController.prototype.updateFPS_ = function () {
+    var fps = this.piskelController.getFPS();
+    if (fps !== this.fpsRangeInput.value) {
+      // reset
+      this.fpsRangeInput.value = 0;
+      // set proper value
+      this.fpsRangeInput.value = fps;
+      this.fpsCounterDisplay.innerHTML = fps + ' FPS';
+    }
+  };
+
+  ns.PreviewActionsController.prototype.toggleOnionSkin_ = function () {
+    var currentValue = pskl.UserSettings.get(pskl.UserSettings.ONION_SKIN);
+    pskl.UserSettings.set(pskl.UserSettings.ONION_SKIN, !currentValue);
+  };
+})();

src/js/controller/preview/PreviewController.js

@@ -11,201 +11,43 @@
 
     this.elapsedTime = 0;
     this.currentIndex = 0;
-
-    this.onionSkinShortcut = pskl.service.keyboard.Shortcuts.MISC.ONION_SKIN;
-
     this.lastRenderTime = 0;
     this.renderFlag = true;
 
-    this.fpsRangeInput = document.querySelector('#preview-fps');
-    this.fpsCounterDisplay = document.querySelector('#display-fps');
-    this.openPopupPreview = document.querySelector('.open-popup-preview-button');
-    this.previewSizeDropdown = document.querySelector('.preview-drop-down');
-    this.previewSizes = {
-      original: {
-        button: document.querySelector('.original-size-button'),
-        shortcut: pskl.service.keyboard.Shortcuts.MISC.X1_PREVIEW,
-        tooltip: 'Original size preview'
-      },
-      best: {
-        button: document.querySelector('.best-size-button'),
-        shortcut: pskl.service.keyboard.Shortcuts.MISC.BEST_PREVIEW,
-        tooltip: 'Best size preview'
-      },
-      full: {
-        button: document.querySelector('.full-size-button'),
-        shortcut: pskl.service.keyboard.Shortcuts.MISC.FULL_PREVIEW,
-        tooltip: 'Full size preview'
-      }
-    };
-    this.toggleOnionSkinButton = document.querySelector('.preview-toggle-onion-skin');
-
     this.renderer = new pskl.rendering.frame.BackgroundImageFrameRenderer(this.container);
     this.popupPreviewController = new ns.PopupPreviewController(piskelController);
+    this.previewActionsController = new ns.PreviewActionsController(this, container);
   };
 
   ns.PreviewController.prototype.init = function () {
-    this.fpsRangeInput.addEventListener('change', this.onFpsRangeInputUpdate_.bind(this));
-    this.fpsRangeInput.addEventListener('input', this.onFpsRangeInputUpdate_.bind(this));
-
-    document.querySelector('.right-column').style.width = Constants.ANIMATED_PREVIEW_WIDTH + 'px';
-
-    var addEvent = pskl.utils.Event.addEventListener;
-    addEvent(this.toggleOnionSkinButton, 'click', this.toggleOnionSkin_, this);
-    addEvent(this.openPopupPreview, 'click', this.onOpenPopupPreviewClick_, this);
-
-    var registerShortcut = pskl.app.shortcutService.registerShortcut.bind(pskl.app.shortcutService);
-    registerShortcut(this.onionSkinShortcut, this.toggleOnionSkin_.bind(this));
-
-    var onionSkinTooltip = pskl.utils.TooltipFormatter.format('Toggle onion skin', this.onionSkinShortcut);
-    this.toggleOnionSkinButton.setAttribute('title', onionSkinTooltip);
-
-    for (var size in this.previewSizes) {
-      if (this.previewSizes.hasOwnProperty(size)) {
-        var previewSize = this.previewSizes[size];
-        addEvent(previewSize.button, 'click', this.onChangePreviewSize_, this, size);
-        registerShortcut(previewSize.shortcut, this.onChangePreviewSize_.bind(this, size));
-        var tooltip = pskl.utils.TooltipFormatter.format(previewSize.tooltip, previewSize.shortcut);
-        previewSize.button.setAttribute('title', tooltip);
-      }
-    }
+    var width = Constants.ANIMATED_PREVIEW_WIDTH + Constants.RIGHT_COLUMN_PADDING_LEFT;
+    document.querySelector('.right-column').style.width = width + 'px';
 
     $.subscribe(Events.FRAME_SIZE_CHANGED, this.onFrameSizeChange_.bind(this));
-    $.subscribe(Events.USER_SETTINGS_CHANGED, $.proxy(this.onUserSettingsChange_, this));
+    $.subscribe(Events.USER_SETTINGS_CHANGED, this.onUserSettingsChange_.bind(this));
     $.subscribe(Events.PISKEL_SAVE_STATE, this.setRenderFlag_.bind(this, true));
-    $.subscribe(Events.FPS_CHANGED, this.updateFPS_.bind(this));
-    // On PISKEL_RESET, set the render flag and update the FPS input
     $.subscribe(Events.PISKEL_RESET, this.setRenderFlag_.bind(this, true));
-    $.subscribe(Events.PISKEL_RESET, this.updateFPS_.bind(this));
 
-    this.updatePreviewSizeButtons_();
     this.popupPreviewController.init();
+    this.previewActionsController.init();
 
     this.updateZoom_();
-    this.updateOnionSkinPreview_();
-    this.selectPreviewSizeButton_();
-    this.updateFPS_();
-    this.updateMaxFPS_();
     this.updateContainerDimensions_();
   };
 
-  ns.PreviewController.prototype.updatePreviewSizeButtons_ = function () {
-    var fullZoom = this.calculateZoom_();
-    var bestZoom = Math.floor(fullZoom);
-    var seamlessModeEnabled = pskl.UserSettings.get(pskl.UserSettings.SEAMLESS_MODE);
-
-    var validSizes;
-    if (fullZoom < 1) {
-      this.disablePreviewSizeWidget_('No other option available');
-      validSizes = ['full'];
-    } else if (fullZoom === 1) {
-      this.disablePreviewSizeWidget_('No other option available');
-      validSizes = ['original'];
-    } else if (seamlessModeEnabled) {
-      this.disablePreviewSizeWidget_('Disabled in seamless mode');
-      validSizes = ['original'];
-    } else {
-      this.enablePreviewSizeWidget_();
-      if (fullZoom === bestZoom) {
-        // If the full zoom is the same as the best zoom, display the best option only as
-        // it gives the exact factor information.
-        validSizes = ['original', 'best'];
-      } else if (bestZoom === 1) {
-        // If best zoom is 1x, remove it as it is redundant with the original option.
-        validSizes = ['full', 'original'];
-      } else {
-        validSizes = ['full', 'original', 'best'];
-      }
-    }
-
-    // Update buttons content and status.
-    this.previewSizes.best.button.textContent = Math.floor(fullZoom) + 'x';
-    for (var size in this.previewSizes) {
-      if (this.previewSizes.hasOwnProperty(size)) {
-        var previewSize = this.previewSizes[size];
-        var isSizeEnabled = validSizes.indexOf(size) != -1;
-
-        // classList.toggle is not available on IE11.
-        if (isSizeEnabled) {
-          previewSize.button.classList.remove('preview-contextual-action-hidden');
-        } else {
-          previewSize.button.classList.add('preview-contextual-action-hidden');
-        }
-      }
-    }
-
-    // Update the selected preview size if the currently selected size is not valid.
-    var selectedSize = pskl.UserSettings.get(pskl.UserSettings.PREVIEW_SIZE);
-    if (validSizes.indexOf(selectedSize) === -1) {
-      this.onChangePreviewSize_(validSizes[0]);
-    }
-  };
-
-  ns.PreviewController.prototype.enablePreviewSizeWidget_ = function () {
-    this.previewSizeDropdown.classList.remove('preview-drop-down-disabled');
-  };
-
-  ns.PreviewController.prototype.disablePreviewSizeWidget_ = function (reason) {
-    // The .preview-disable-overlay is displayed on top of the preview size widget
-    document.querySelector('.preview-disable-overlay').setAttribute('data-original-title', reason);
-    this.previewSizeDropdown.classList.add('preview-drop-down-disabled');
-  };
-
-  ns.PreviewController.prototype.onOpenPopupPreviewClick_ = function () {
+  ns.PreviewController.prototype.openPopupPreview = function () {
     this.popupPreviewController.open();
   };
 
-  ns.PreviewController.prototype.onChangePreviewSize_ = function (size) {
-    var previewSize = this.previewSizes[size];
-    var isEnabled = !previewSize.button.classList.contains('preview-contextual-action-hidden');
-    if (isEnabled) {
-      pskl.UserSettings.set(pskl.UserSettings.PREVIEW_SIZE, size);
-    }
-  };
-
   ns.PreviewController.prototype.onUserSettingsChange_ = function (evt, name, value) {
-    if (name == pskl.UserSettings.ONION_SKIN) {
-      this.updateOnionSkinPreview_();
-    } else if (name == pskl.UserSettings.MAX_FPS) {
-      this.updateMaxFPS_();
-    } else if (name === pskl.UserSettings.SEAMLESS_MODE) {
+    if (name === pskl.UserSettings.SEAMLESS_MODE) {
       this.onFrameSizeChange_();
     } else {
       this.updateZoom_();
-      this.selectPreviewSizeButton_();
       this.updateContainerDimensions_();
     }
   };
 
-  ns.PreviewController.prototype.updateOnionSkinPreview_ = function () {
-    var enabledClassname = 'preview-toggle-onion-skin-enabled';
-    var isEnabled = pskl.UserSettings.get(pskl.UserSettings.ONION_SKIN);
-
-    // classList.toggle is not available on IE11.
-    if (isEnabled) {
-      this.toggleOnionSkinButton.classList.add(enabledClassname);
-    } else {
-      this.toggleOnionSkinButton.classList.remove(enabledClassname);
-    }
-  };
-
-  ns.PreviewController.prototype.selectPreviewSizeButton_ = function () {
-    var currentlySelected = document.querySelector('.size-button-selected');
-    if (currentlySelected) {
-      currentlySelected.classList.remove('size-button-selected');
-    }
-
-    var selectedSize = pskl.UserSettings.get(pskl.UserSettings.PREVIEW_SIZE);
-    var previewSize = this.previewSizes[selectedSize];
-    previewSize.button.classList.add('size-button-selected');
-  };
-
-  ns.PreviewController.prototype.updateMaxFPS_ = function () {
-    var maxFps = pskl.UserSettings.get(pskl.UserSettings.MAX_FPS);
-    this.fpsRangeInput.setAttribute('max', maxFps);
-    this.piskelController.setFPS(Math.min(maxFps, this.piskelController.getFPS()));
-  };
-
   ns.PreviewController.prototype.updateZoom_ = function () {
     var previewSize = pskl.UserSettings.get(pskl.UserSettings.PREVIEW_SIZE);
 
@@ -227,9 +69,9 @@
   };
 
   ns.PreviewController.prototype.getCoordinates = function(x, y) {
-    var containerOffset = this.container.offset();
-    x = x - containerOffset.left;
-    y = y - containerOffset.top;
+    var containerRect = this.container.getBoundingClientRect();
+    x = x - containerRect.left;
+    y = y - containerRect.top;
     var zoom = this.getZoom();
     return {
       x : Math.floor(x / zoom),
@@ -237,30 +79,6 @@
     };
   };
 
-  /**
-   * Event handler triggered on 'input' or 'change' events.
-   */
-  ns.PreviewController.prototype.onFpsRangeInputUpdate_ = function (evt) {
-    var fps = parseInt(this.fpsRangeInput.value, 10);
-    this.piskelController.setFPS(fps);
-    // blur only on 'change' events, as blurring on 'input' breaks on Firefox
-    if (evt.type === 'change') {
-      this.fpsRangeInput.blur();
-    }
-  };
-
-  ns.PreviewController.prototype.updateFPS_ = function () {
-    var fps = this.piskelController.getFPS();
-    if (fps !== this.fps) {
-      this.fps = fps;
-      // reset
-      this.fpsRangeInput.value = 0;
-      // set proper value
-      this.fpsRangeInput.value = this.fps;
-      this.fpsCounterDisplay.innerHTML = this.fps + ' FPS';
-    }
-  };
-
   ns.PreviewController.prototype.render = function (delta) {
     this.elapsedTime += delta;
     var index = this.getNextIndex_(delta);
@@ -276,15 +94,18 @@
   };
 
   ns.PreviewController.prototype.getNextIndex_ = function (delta) {
-    if (this.fps === 0) {
+    var fps = this.piskelController.getFPS();
+    if (fps === 0) {
       return this.piskelController.getCurrentFrameIndex();
     } else {
-      var index = Math.floor(this.elapsedTime / (1000 / this.fps));
-      if (!this.piskelController.hasFrameAt(index)) {
+      var index = Math.floor(this.elapsedTime / (1000 / fps));
+      var frameIndexes = this.piskelController.getVisibleFrameIndexes();
+      if (frameIndexes.length <= index) {
         this.elapsedTime = 0;
-        index = 0;
+        index = (frameIndexes.length) ? frameIndexes[0] : this.piskelController.getCurrentFrameIndex();
+        return index;
       }
-      return index;
+      return frameIndexes[index];
     }
   };
 
@@ -302,14 +123,14 @@
   ns.PreviewController.prototype.onFrameSizeChange_ = function () {
     this.updateZoom_();
     this.updateContainerDimensions_();
-    this.updatePreviewSizeButtons_();
   };
 
   ns.PreviewController.prototype.updateContainerDimensions_ = function () {
     var isSeamless = pskl.UserSettings.get(pskl.UserSettings.SEAMLESS_MODE);
     this.renderer.setRepeated(isSeamless);
 
-    var height, width;
+    var width;
+    var height;
 
     if (isSeamless) {
       height = PREVIEW_SIZE;
@@ -321,7 +142,7 @@
       width = frame.getWidth() * zoom;
     }
 
-    var containerEl = this.container.get(0);
+    var containerEl = this.container;
     containerEl.style.height = height + 'px';
     containerEl.style.width = width + 'px';
 
@@ -342,9 +163,4 @@
     return (this.renderFlag || this.popupPreviewController.renderFlag) &&
             (Date.now() - this.lastRenderTime > RENDER_MINIMUM_DELAY);
   };
-
-  ns.PreviewController.prototype.toggleOnionSkin_ = function () {
-    var currentValue = pskl.UserSettings.get(pskl.UserSettings.ONION_SKIN);
-    pskl.UserSettings.set(pskl.UserSettings.ONION_SKIN, !currentValue);
-  };
 })();

src/js/controller/settings/ApplicationSettingsController.js

@@ -1,144 +0,0 @@
-(function () {
-  var ns = $.namespace('pskl.controller.settings');
-
-  ns.ApplicationSettingsController = function () {};
-
-  pskl.utils.inherit(ns.ApplicationSettingsController, pskl.controller.settings.AbstractSettingController);
-
-  ns.ApplicationSettingsController.prototype.init = function() {
-    this.backgroundContainer = document.querySelector('.background-picker-wrapper');
-    this.addEventListener(this.backgroundContainer, 'click', this.onBackgroundClick_);
-
-    // Highlight selected background :
-    var background = pskl.UserSettings.get(pskl.UserSettings.CANVAS_BACKGROUND);
-    var selectedBackground = this.backgroundContainer.querySelector('[data-background=' + background + ']');
-    if (selectedBackground) {
-      selectedBackground.classList.add('selected');
-    }
-
-    // Grid display and size
-    var gridWidth = pskl.UserSettings.get(pskl.UserSettings.GRID_WIDTH);
-    var gridSelect = document.querySelector('.grid-width-select');
-    var selectedOption = gridSelect.querySelector('option[value="' + gridWidth + '"]');
-    if (selectedOption) {
-      selectedOption.setAttribute('selected', 'selected');
-    }
-
-    this.addEventListener(gridSelect, 'change', this.onGridWidthChange_);
-
-    // Seamless mode
-    var seamlessMode = pskl.UserSettings.get(pskl.UserSettings.SEAMLESS_MODE);
-    var seamlessModeCheckbox = document.querySelector('.seamless-mode-checkbox');
-    if (seamlessMode) {
-      seamlessModeCheckbox.setAttribute('checked', seamlessMode);
-    }
-    this.addEventListener(seamlessModeCheckbox, 'change', this.onSeamlessModeChange_);
-
-    // Max FPS
-    var maxFpsInput = document.querySelector('.max-fps-input');
-    maxFpsInput.value = pskl.UserSettings.get(pskl.UserSettings.MAX_FPS);
-    this.addEventListener(maxFpsInput, 'change', this.onMaxFpsChange_);
-
-    // Color format
-    var colorFormat = pskl.UserSettings.get(pskl.UserSettings.COLOR_FORMAT);
-    var colorFormatSelect = document.querySelector('.color-format-select');
-    var selectedColorFormatOption = colorFormatSelect.querySelector('option[value="' + colorFormat + '"]');
-    if (selectedColorFormatOption) {
-      selectedColorFormatOption.setAttribute('selected', 'selected');
-    }
-
-    this.addEventListener(colorFormatSelect, 'change', this.onColorFormatChange_);
-
-    // Layer preview opacity
-    var layerOpacityInput = document.querySelector('.layer-opacity-input');
-    layerOpacityInput.value = pskl.UserSettings.get(pskl.UserSettings.LAYER_OPACITY);
-    this.addEventListener(layerOpacityInput, 'change', this.onLayerOpacityChange_);
-    this.addEventListener(layerOpacityInput, 'input', this.onLayerOpacityChange_);
-    this.updateLayerOpacityText_(layerOpacityInput.value);
-
-    // Seamless mask opacity
-    var seamlessOpacityInput = document.querySelector('.seamless-opacity-input');
-    seamlessOpacityInput.value = pskl.UserSettings.get(pskl.UserSettings.SEAMLESS_OPACITY);
-    this.addEventListener(seamlessOpacityInput, 'change', this.onSeamlessOpacityChange_);
-    this.addEventListener(seamlessOpacityInput, 'input', this.onSeamlessOpacityChange_);
-    this.updateSeamlessOpacityText_(seamlessOpacityInput.value);
-
-    // Form
-    this.applicationSettingsForm = document.querySelector('[name="application-settings-form"]');
-    this.addEventListener(this.applicationSettingsForm, 'submit', this.onFormSubmit_);
-  };
-
-  ns.ApplicationSettingsController.prototype.onGridWidthChange_ = function (evt) {
-    var width = parseInt(evt.target.value, 10);
-    pskl.UserSettings.set(pskl.UserSettings.GRID_WIDTH, width);
-  };
-
-  ns.ApplicationSettingsController.prototype.onColorFormatChange_ = function (evt) {
-    pskl.UserSettings.set(pskl.UserSettings.COLOR_FORMAT, evt.target.value);
-  };
-
-  ns.ApplicationSettingsController.prototype.onSeamlessModeChange_ = function (evt) {
-    pskl.UserSettings.set(pskl.UserSettings.SEAMLESS_MODE, evt.currentTarget.checked);
-  };
-
-  ns.ApplicationSettingsController.prototype.onBackgroundClick_ = function (evt) {
-    var target = evt.target;
-    var background = target.dataset.background;
-    if (background) {
-      pskl.UserSettings.set(pskl.UserSettings.CANVAS_BACKGROUND, background);
-      var selected = this.backgroundContainer.querySelector('.selected');
-      if (selected) {
-        selected.classList.remove('selected');
-      }
-      target.classList.add('selected');
-    }
-  };
-
-  ns.ApplicationSettingsController.prototype.onMaxFpsChange_ = function (evt) {
-    var target = evt.target;
-    var fps = parseInt(target.value, 10);
-    if (fps && !isNaN(fps)) {
-      pskl.UserSettings.set(pskl.UserSettings.MAX_FPS, fps);
-    } else {
-      target.value = pskl.UserSettings.get(pskl.UserSettings.MAX_FPS);
-    }
-  };
-
-  ns.ApplicationSettingsController.prototype.onLayerOpacityChange_ = function (evt) {
-    var target = evt.target;
-    var opacity = parseFloat(target.value);
-    if (!isNaN(opacity)) {
-      pskl.UserSettings.set(pskl.UserSettings.LAYER_OPACITY, opacity);
-      pskl.UserSettings.set(pskl.UserSettings.LAYER_PREVIEW, opacity !== 0);
-      this.updateLayerOpacityText_(opacity);
-    } else {
-      target.value = pskl.UserSettings.get(pskl.UserSettings.LAYER_OPACITY);
-    }
-  };
-
-  ns.ApplicationSettingsController.prototype.onSeamlessOpacityChange_ = function (evt) {
-    var target = evt.target;
-    var opacity = parseFloat(target.value);
-    if (!isNaN(opacity)) {
-      pskl.UserSettings.set(pskl.UserSettings.SEAMLESS_OPACITY, opacity);
-      this.updateSeamlessOpacityText_(opacity);
-    } else {
-      target.value = pskl.UserSettings.get(pskl.UserSettings.SEAMLESS_OPACITY);
-    }
-  };
-
-  ns.ApplicationSettingsController.prototype.updateLayerOpacityText_ = function (opacity) {
-    var layerOpacityText = document.querySelector('.layer-opacity-text');
-    layerOpacityText.innerHTML = opacity;
-  };
-
-  ns.ApplicationSettingsController.prototype.updateSeamlessOpacityText_ = function (opacity) {
-    var seamlessOpacityText = document.querySelector('.seamless-opacity-text');
-    seamlessOpacityText.innerHTML = opacity;
-  };
-
-  ns.ApplicationSettingsController.prototype.onFormSubmit_ = function (evt) {
-    evt.preventDefault();
-    $.publish(Events.CLOSE_SETTINGS_DRAWER);
-  };
-})();

src/js/controller/settings/ImportController.js

@@ -14,6 +14,7 @@
     this.hiddenOpenPiskelInput = document.querySelector('[name="open-piskel-input"]');
 
     this.addEventListener('.browse-local-button', 'click', this.onBrowseLocalClick_);
+    this.addEventListener('.browse-backups-button', 'click', this.onBrowseBackupsClick_);
     this.addEventListener('.file-input-button', 'click', this.onFileInputClick_);
 
     // different handlers, depending on the Environment
@@ -23,24 +24,6 @@
       this.addEventListener(this.hiddenOpenPiskelInput, 'change', this.onOpenPiskelChange_);
       this.addEventListener('.open-piskel-button', 'click', this.onOpenPiskelClick_);
     }
-
-    this.initRestoreSession_();
-  };
-
-  ns.ImportController.prototype.initRestoreSession_ = function () {
-    var previousSessionContainer = document.querySelector('.previous-session');
-    var previousInfo = pskl.app.backupService.getPreviousPiskelInfo();
-    if (previousInfo) {
-      var previousSessionTemplate_ = pskl.utils.Template.get('previous-session-info-template');
-      var date = pskl.utils.DateUtils.format(previousInfo.date, '{{H}}:{{m}} - {{Y}}/{{M}}/{{D}}');
-      previousSessionContainer.innerHTML = pskl.utils.Template.replace(previousSessionTemplate_, {
-        name : previousInfo.name,
-        date : date
-      });
-      this.addEventListener('.restore-session-button', 'click', this.onRestorePreviousSessionClick_);
-    } else {
-      previousSessionContainer.innerHTML = 'No piskel backup was found on this browser.';
-    }
   };
 
   ns.ImportController.prototype.closeDrawer_ = function () {
@@ -77,6 +60,13 @@
     this.closeDrawer_();
   };
 
+  ns.ImportController.prototype.onBrowseBackupsClick_ = function (evt) {
+    $.publish(Events.DIALOG_SHOW, {
+      dialogId : 'browse-backups'
+    });
+    this.closeDrawer_();
+  };
+
   ns.ImportController.prototype.openPiskelFile_ = function (file) {
     if (this.isPiskel_(file)) {
       $.publish(Events.DIALOG_SHOW, {

src/js/controller/settings/PreferencesController.js

@@ -0,0 +1,35 @@
+(function () {
+  var ns = $.namespace('pskl.controller.settings');
+
+  var tabs = {
+    'misc' : {
+      template : 'templates/settings/preferences/misc.html',
+      controller : ns.preferences.MiscPreferencesController
+    },
+    'grid' : {
+      template : 'templates/settings/preferences/grid.html',
+      controller : ns.preferences.GridPreferencesController
+    },
+    'tile' : {
+      template : 'templates/settings/preferences/tile.html',
+      controller : ns.preferences.TilePreferencesController
+    }
+  };
+
+  ns.PreferencesController = function () {
+    this.tabsWidget = new pskl.widgets.Tabs(tabs, this, pskl.UserSettings.PREFERENCES_TAB);
+  };
+
+  pskl.utils.inherit(ns.PreferencesController, pskl.controller.settings.AbstractSettingController);
+
+  ns.PreferencesController.prototype.init = function() {
+    var container = document.querySelector('.settings-section-preferences');
+    this.tabsWidget.init(container);
+  };
+
+  ns.PreferencesController.prototype.destroy = function () {
+    this.tabsWidget.destroy();
+    this.superclass.destroy.call(this);
+  };
+
+})();

src/js/controller/settings/SaveController.js

@@ -34,7 +34,7 @@
     this.saveDesktopAsNewButton = document.querySelector('#save-desktop-as-new-button');
     this.saveFileDownloadButton = document.querySelector('#save-file-download-button');
 
-    this.safeAddEventListener_(this.saveLocalStorageButton, 'click', this.saveToLocalStorage_);
+    this.safeAddEventListener_(this.saveLocalStorageButton, 'click', this.saveToIndexedDb_);
     this.safeAddEventListener_(this.saveGalleryButton, 'click', this.saveToGallery_);
     this.safeAddEventListener_(this.saveDesktopButton, 'click', this.saveToDesktop_);
     this.safeAddEventListener_(this.saveDesktopAsNewButton, 'click', this.saveToDesktopAsNew_);
@@ -99,7 +99,7 @@
     if (pskl.app.isLoggedIn()) {
       this.saveToGallery_();
     } else {
-      this.saveToLocalStorage_();
+      this.saveToIndexedDb_();
     }
   };
 
@@ -111,8 +111,8 @@
     this.saveTo_('saveToGallery', false);
   };
 
-  ns.SaveController.prototype.saveToLocalStorage_ = function () {
-    this.saveTo_('saveToLocalStorage', false);
+  ns.SaveController.prototype.saveToIndexedDb_ = function () {
+    this.saveTo_('saveToIndexedDb', false);
   };
 
   ns.SaveController.prototype.saveToDesktop_ = function () {

src/js/controller/settings/SettingsController.js

@@ -3,8 +3,8 @@
 
   var settings = {
     'user' : {
-      template : 'templates/settings/application.html',
-      controller : ns.ApplicationSettingsController
+      template : 'templates/settings/preferences.html',
+      controller : ns.PreferencesController
     },
     'resize' : {
       template : 'templates/settings/resize.html',

src/js/controller/settings/exportimage/ExportController.js

@@ -22,6 +22,7 @@
 
   ns.ExportController = function (piskelController) {
     this.piskelController = piskelController;
+    this.tabsWidget = new pskl.widgets.Tabs(tabs, this, pskl.UserSettings.EXPORT_TAB);
     this.onSizeInputChange_ = this.onSizeInputChange_.bind(this);
   };
 
@@ -47,47 +48,16 @@
     this.onSizeInputChange_();
 
     // Initialize tabs and panel
-    this.exportPanel = document.querySelector('.export-panel');
-    this.exportTabs = document.querySelector('.export-tabs');
-    this.addEventListener(this.exportTabs, 'click', this.onTabsClicked_);
-
-    var tab = pskl.UserSettings.get(pskl.UserSettings.EXPORT_TAB);
-    this.selectTab(tab);
+    var container = document.querySelector('.settings-section-export');
+    this.tabsWidget.init(container);
   };
 
   ns.ExportController.prototype.destroy = function () {
     this.sizeInputWidget.destroy();
-    this.currentController.destroy();
+    this.tabsWidget.destroy();
     this.superclass.destroy.call(this);
   };
 
-  ns.ExportController.prototype.selectTab = function (tabId) {
-    if (!tabs[tabId] || this.currentTab == tabId) {
-      return;
-    }
-
-    if (this.currentController) {
-      this.currentController.destroy();
-    }
-
-    this.exportPanel.innerHTML = pskl.utils.Template.get(tabs[tabId].template);
-    this.currentController = new tabs[tabId].controller(this.piskelController, this);
-    this.currentController.init();
-    this.currentTab = tabId;
-    pskl.UserSettings.set(pskl.UserSettings.EXPORT_TAB, tabId);
-
-    var selectedTab = this.exportTabs.querySelector('.selected');
-    if (selectedTab) {
-      selectedTab.classList.remove('selected');
-    }
-    this.exportTabs.querySelector('[data-tab-id="' + tabId + '"]').classList.add('selected');
-  };
-
-  ns.ExportController.prototype.onTabsClicked_ = function (e) {
-    var tabId = pskl.utils.Dom.getData(e.target, 'tabId');
-    this.selectTab(tabId);
-  };
-
   ns.ExportController.prototype.onScaleChange_ = function () {
     var value = parseFloat(this.scaleInput.value);
     if (!isNaN(value)) {

src/js/controller/settings/exportimage/GifExportController.js

@@ -14,14 +14,22 @@
   pskl.utils.inherit(ns.GifExportController, pskl.controller.settings.AbstractSettingController);
 
   ns.GifExportController.prototype.init = function () {
-
     this.uploadStatusContainerEl = document.querySelector('.gif-upload-status');
     this.previewContainerEl = document.querySelector('.gif-export-preview');
     this.uploadButton = document.querySelector('.gif-upload-button');
     this.downloadButton = document.querySelector('.gif-download-button');
+    this.repeatCheckbox = document.querySelector('.gif-repeat-checkbox');
+
+    // Initialize repeatCheckbox state
+    this.repeatCheckbox.checked = this.getRepeatSetting_();
 
     this.addEventListener(this.uploadButton, 'click', this.onUploadButtonClick_);
     this.addEventListener(this.downloadButton, 'click', this.onDownloadButtonClick_);
+    this.addEventListener(this.repeatCheckbox, 'change', this.onRepeatCheckboxChange_);
+
+    var currentColors = pskl.app.currentColorsService.getCurrentColors();
+    var tooManyColors = currentColors.length >= MAX_GIF_COLORS;
+    document.querySelector('.gif-export-warning').classList.toggle('visible', tooManyColors);
   };
 
   ns.GifExportController.prototype.getZoom_ = function () {
@@ -85,7 +93,8 @@
     var isTransparent = layers.some(function (l) {return l.isTransparent();});
     var preserveColors = !isTransparent && currentColors.length < MAX_GIF_COLORS;
 
-    var transparentColor, transparent;
+    var transparentColor;
+    var transparent;
     // transparency only supported if preserveColors is true, see Issue #357
     if (preserveColors) {
       transparentColor = this.getTransparentColor(currentColors);
@@ -104,6 +113,7 @@
       width: width * zoom,
       height: height * zoom,
       preserveColors : preserveColors,
+      repeat: this.getRepeatSetting_() ? 0 : -1,
       transparent : transparent
     });
 
@@ -148,6 +158,15 @@
     return transparentColor;
   };
 
+  ns.GifExportController.prototype.onRepeatCheckboxChange_ = function () {
+    var checked = this.repeatCheckbox.checked;
+    pskl.UserSettings.set(pskl.UserSettings.EXPORT_GIF_REPEAT, checked);
+  };
+
+  ns.GifExportController.prototype.getRepeatSetting_ = function () {
+    return pskl.UserSettings.get(pskl.UserSettings.EXPORT_GIF_REPEAT);
+  };
+
   ns.GifExportController.prototype.updateStatus_ = function (imageUrl, error) {
     if (imageUrl) {
       var linkTpl = '<a class="highlight" href="{{link}}" target="_blank">{{shortLink}}</a>';

src/js/controller/settings/exportimage/MiscExportController.js

@@ -12,9 +12,6 @@
   ns.MiscExportController.prototype.init = function () {
     var cDownloadButton = document.querySelector('.c-download-button');
     this.addEventListener(cDownloadButton, 'click', this.onDownloadCFileClick_);
-
-    var selectedFrameDownloadButton = document.querySelector('.selected-frame-download-button');
-    this.addEventListener(selectedFrameDownloadButton, 'click', this.onDownloadSelectedFrameClick_);
   };
 
   ns.MiscExportController.prototype.onDownloadCFileClick_ = function (evt) {
@@ -76,14 +73,4 @@
     hexStr += ('00' + r.toString(16)).substr(-2);
     return hexStr;
   };
-
-  ns.MiscExportController.prototype.onDownloadSelectedFrameClick_ = function (evt) {
-    var frameIndex = this.piskelController.getCurrentFrameIndex();
-    var fileName = this.getPiskelName_() + '-' + (frameIndex + 1) + '.png';
-    var canvas = this.piskelController.renderFrameAt(frameIndex, true);
-
-    pskl.utils.BlobUtils.canvasToBlob(canvas, function(blob) {
-      pskl.utils.FileUtils.downloadAsFile(blob, fileName);
-    });
-  };
 })();

src/js/controller/settings/exportimage/PngExportController.js

@@ -31,6 +31,9 @@
     var downloadButton = document.querySelector('.png-download-button');
     var downloadPixiButton = document.querySelector('.png-pixi-download-button');
     var dataUriButton = document.querySelector('.datauri-open-button');
+    var selectedFrameDownloadButton = document.querySelector('.selected-frame-download-button');
+
+    this.pixiInlineImageCheckbox = document.querySelector('.png-pixi-inline-image-checkbox');
 
     this.initLayoutSection_();
     this.updateDimensionLabel_();
@@ -39,6 +42,7 @@
     this.addEventListener(downloadButton, 'click', this.onDownloadClick_);
     this.addEventListener(downloadPixiButton, 'click', this.onPixiDownloadClick_);
     this.addEventListener(dataUriButton, 'click', this.onDataUriClick_);
+    this.addEventListener(selectedFrameDownloadButton, 'click', this.onDownloadSelectedFrameClick_);
     $.subscribe(Events.EXPORT_SCALE_CHANGED, this.onScaleChanged_);
   };
 
@@ -149,9 +153,9 @@
   };
 
   // Used and overridden in casper integration tests.
-  ns.PngExportController.prototype.downloadCanvas_ = function (canvas) {
+  ns.PngExportController.prototype.downloadCanvas_ = function (canvas, name) {
     // Generate file name
-    var name = this.piskelController.getPiskel().getDescriptor().name;
+    name = name || this.piskelController.getPiskel().getDescriptor().name;
     var fileName = name + '.png';
 
     // Transform to blob and start download.
@@ -167,7 +171,15 @@
     var canvas = this.createPngSpritesheet_();
     var name = this.piskelController.getPiskel().getDescriptor().name;
 
-    zip.file(name + '.png', pskl.utils.CanvasUtils.getBase64FromCanvas(canvas) + '\n', {base64: true});
+    var image;
+
+    if (this.pixiInlineImageCheckbox.checked) {
+      image = canvas.toDataURL('image/png');
+    } else {
+      image = name + '.png';
+
+      zip.file(image, pskl.utils.CanvasUtils.getBase64FromCanvas(canvas) + '\n', {base64: true});
+    }
 
     var width = canvas.width / this.getColumns_();
     var height = canvas.height / this.getRows_();
@@ -190,9 +202,9 @@
     var json = {
       'frames': frames,
       'meta': {
-        'app': 'https://github.com/juliandescottes/piskel/',
+        'app': 'https://github.com/piskelapp/piskel/',
         'version': '1.0',
-        'image': name + '.png',
+        'image': image,
         'format': 'RGBA8888',
         'size': {'w': canvas.width,'h': canvas.height}
       }
@@ -207,6 +219,27 @@
   };
 
   ns.PngExportController.prototype.onDataUriClick_ = function (evt) {
-    window.open(this.createPngSpritesheet_().toDataURL('image/png'));
+    var popup = window.open('about:blank');
+    var dataUri = this.createPngSpritesheet_().toDataURL('image/png');
+    window.setTimeout(function () {
+      var html = pskl.utils.Template.getAndReplace('data-uri-export-partial', {
+        src: dataUri
+      });
+      popup.document.title = dataUri;
+      popup.document.body.innerHTML = html;
+    }.bind(this), 500);
+  };
+
+  ns.PngExportController.prototype.onDownloadSelectedFrameClick_ = function (evt) {
+    var frameIndex = this.piskelController.getCurrentFrameIndex();
+    var name = this.piskelController.getPiskel().getDescriptor().name;
+    var canvas = this.piskelController.renderFrameAt(frameIndex, true);
+    var zoom = this.exportController.getExportZoom();
+    if (zoom != 1) {
+      canvas = pskl.utils.ImageResizer.resize(canvas, canvas.width * zoom, canvas.height * zoom, false);
+    }
+
+    var fileName = name + '-' + (frameIndex + 1) + '.png';
+    this.downloadCanvas_(canvas, fileName);
   };
 })();

src/js/controller/settings/exportimage/ZipExportController.js

@@ -12,12 +12,25 @@
     this.pngFilePrefixInput = document.querySelector('.zip-prefix-name');
     this.pngFilePrefixInput.value = 'sprite_';
 
-    this.splitByLayersCheckbox =  document.querySelector('.zip-split-layers-checkbox');
+    this.splitByLayersCheckbox = document.querySelector('.zip-split-layers-checkbox');
+    this.addEventListener(this.splitByLayersCheckbox, 'change', this.onSplitLayersClick_);
+
+    this.useLayerNamesContainer = document.querySelector('.use-layer-names-container');
+    this.useLayerNamesCheckbox = document.querySelector('.zip-use-layer-names-checkbox');
+    this.toggleHideUseLayerNamesCheckbox();
 
     var zipButton = document.querySelector('.zip-generate-button');
     this.addEventListener(zipButton, 'click', this.onZipButtonClick_);
   };
 
+  ns.ZipExportController.prototype.toggleHideUseLayerNamesCheckbox = function () {
+    this.useLayerNamesContainer.style.display = (this.splitByLayersCheckbox.checked ? 'block' : 'none');
+  };
+
+  ns.ZipExportController.prototype.onSplitLayersClick_ = function () {
+    this.toggleHideUseLayerNamesCheckbox();
+  };
+
   ns.ZipExportController.prototype.onZipButtonClick_ = function () {
     var zip = new window.JSZip();
 
@@ -63,6 +76,9 @@
         var basename = this.pngFilePrefixInput.value;
         var frameid = pskl.utils.StringUtils.leftPad(i + 1, framePaddingLength, '0');
         var filename = 'l' + layerid + '_' + basename + frameid + '.png';
+        if (this.useLayerNamesCheckbox.checked) {
+          filename = layer.getName() + '_' + basename + frameid + '.png';
+        }
         zip.file(filename, pskl.utils.CanvasUtils.getBase64FromCanvas(canvas) + '\n', {base64: true});
       }
     }

src/js/controller/settings/preferences/GridPreferencesController.js

@@ -0,0 +1,101 @@
+(function () {
+  var ns = $.namespace('pskl.controller.settings.preferences');
+
+  var colorsMap = {
+    'transparent': Constants.TRANSPARENT_COLOR,
+    'white': '#FFF1E8',
+    'light-gray': '#C2C3C7',
+    'dark-gray': '#5F574F',
+    'black': '#000000',
+    'blue': '#29ADFF',
+    'dark-blue': '#1D2B53',
+    'green': '#00E436',
+    'dark-green': '#008751',
+    'peach': '#FFCCAA',
+    'pink': '#FF77A8',
+    'yellow': '#FFEC27',
+    'orange': '#FFA300',
+    'red': '#FF004D',
+  };
+
+  ns.GridPreferencesController = function (piskelController, preferencesController) {
+    this.piskelController = piskelController;
+    this.preferencesController = preferencesController;
+    this.sizePicker = new pskl.widgets.SizePicker(this.onSizePickerChanged_.bind(this));
+    this.spacingPicker = new pskl.widgets.SizePicker(this.onSpacingPickerChanged_.bind(this));
+  };
+
+  pskl.utils.inherit(ns.GridPreferencesController, pskl.controller.settings.AbstractSettingController);
+
+  ns.GridPreferencesController.prototype.init = function () {
+    // Grid enabled
+    var isEnabled = pskl.UserSettings.get(pskl.UserSettings.GRID_ENABLED);
+    var enableGridCheckbox = document.querySelector('.enable-grid-checkbox');
+    if (isEnabled) {
+      enableGridCheckbox.setAttribute('checked', 'true');
+    }
+    this.addEventListener(enableGridCheckbox, 'change', this.onEnableGridChange_);
+
+    // Grid size
+    var gridWidth = pskl.UserSettings.get(pskl.UserSettings.GRID_WIDTH);
+    this.sizePicker.init(document.querySelector('.grid-size-container'));
+    this.sizePicker.setSize(gridWidth);
+
+    //Grid Spacing
+    var gridSpacing = pskl.UserSettings.get(pskl.UserSettings.GRID_SPACING);
+    this.spacingPicker.init(document.querySelector('.grid-spacing-container'));
+    this.spacingPicker.setSize(gridSpacing);
+
+    // Grid color
+    var colorListItemTemplate = pskl.utils.Template.get('color-list-item-template');
+
+    var gridColor = pskl.UserSettings.get(pskl.UserSettings.GRID_COLOR);
+    var gridColorSelect = document.querySelector('#grid-color');
+
+    var markup = '';
+    Object.keys(colorsMap).forEach(function (key, index) {
+      var background = colorsMap[key];
+      if (key === 'transparent') {
+        background = 'url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAwAAAAMCAIAAADZ' +
+            'F8uwAAAAGUlEQVQYV2M4gwH+YwCGIasIUwhT25BVBADtzYNYrHvv4gAAAABJRU5ErkJggg==)';
+      }
+      markup += pskl.utils.Template.replace(colorListItemTemplate, {
+        color: colorsMap[key],
+        title: key,
+        background: background,
+        ':selected': gridColor === colorsMap[key]
+      });
+    });
+    this.gridColorList = document.querySelector('.grid-colors-list');
+    this.gridColorList.innerHTML = markup;
+
+    this.addEventListener(this.gridColorList, 'click', this.onGridColorClicked_.bind(this));
+  };
+
+  ns.GridPreferencesController.prototype.destroy = function () {
+    this.sizePicker.destroy();
+    this.spacingPicker.destroy();
+    this.superclass.destroy.call(this);
+  };
+
+  ns.GridPreferencesController.prototype.onSizePickerChanged_ = function (size) {
+    pskl.UserSettings.set(pskl.UserSettings.GRID_WIDTH, size);
+  };
+
+  ns.GridPreferencesController.prototype.onSpacingPickerChanged_ = function (size) {
+    pskl.UserSettings.set(pskl.UserSettings.GRID_SPACING, size);
+  };
+
+  ns.GridPreferencesController.prototype.onEnableGridChange_ = function (evt) {
+    pskl.UserSettings.set(pskl.UserSettings.GRID_ENABLED, evt.currentTarget.checked);
+  };
+
+  ns.GridPreferencesController.prototype.onGridColorClicked_ = function (evt) {
+    var color = evt.target.dataset.color;
+    if (color) {
+      pskl.UserSettings.set(pskl.UserSettings.GRID_COLOR, color);
+      this.gridColorList.querySelector('.selected').classList.remove('selected');
+      evt.target.classList.add('selected');
+    }
+  };
+})();

src/js/controller/settings/preferences/MiscPreferencesController.js

@@ -0,0 +1,88 @@
+(function () {
+  var ns = $.namespace('pskl.controller.settings.preferences');
+
+  ns.MiscPreferencesController = function (piskelController, preferencesController) {
+    this.piskelController = piskelController;
+    this.preferencesController = preferencesController;
+  };
+
+  pskl.utils.inherit(ns.MiscPreferencesController, pskl.controller.settings.AbstractSettingController);
+
+  ns.MiscPreferencesController.prototype.init = function () {
+
+    this.backgroundContainer = document.querySelector('.background-picker-wrapper');
+    this.addEventListener(this.backgroundContainer, 'click', this.onBackgroundClick_);
+
+    // Highlight selected background :
+    var background = pskl.UserSettings.get(pskl.UserSettings.CANVAS_BACKGROUND);
+    var selectedBackground = this.backgroundContainer.querySelector('[data-background=' + background + ']');
+    if (selectedBackground) {
+      selectedBackground.classList.add('selected');
+    }
+
+    // Max FPS
+    var maxFpsInput = document.querySelector('.max-fps-input');
+    maxFpsInput.value = pskl.UserSettings.get(pskl.UserSettings.MAX_FPS);
+    this.addEventListener(maxFpsInput, 'change', this.onMaxFpsChange_);
+
+    // Color format
+    var colorFormat = pskl.UserSettings.get(pskl.UserSettings.COLOR_FORMAT);
+    var colorFormatSelect = document.querySelector('.color-format-select');
+    var selectedColorFormatOption = colorFormatSelect.querySelector('option[value="' + colorFormat + '"]');
+    if (selectedColorFormatOption) {
+      selectedColorFormatOption.setAttribute('selected', 'selected');
+    }
+    this.addEventListener(colorFormatSelect, 'change', this.onColorFormatChange_);
+
+    // Layer preview opacity
+    var layerOpacityInput = document.querySelector('.layer-opacity-input');
+    layerOpacityInput.value = pskl.UserSettings.get(pskl.UserSettings.LAYER_OPACITY);
+    this.addEventListener(layerOpacityInput, 'change', this.onLayerOpacityChange_);
+    this.addEventListener(layerOpacityInput, 'input', this.onLayerOpacityChange_);
+    this.updateLayerOpacityText_(layerOpacityInput.value);
+  };
+
+  ns.MiscPreferencesController.prototype.onBackgroundClick_ = function (evt) {
+    var target = evt.target;
+    var background = target.dataset.background;
+    if (background) {
+      pskl.UserSettings.set(pskl.UserSettings.CANVAS_BACKGROUND, background);
+      var selected = this.backgroundContainer.querySelector('.selected');
+      if (selected) {
+        selected.classList.remove('selected');
+      }
+      target.classList.add('selected');
+    }
+  };
+
+  ns.MiscPreferencesController.prototype.onColorFormatChange_ = function (evt) {
+    pskl.UserSettings.set(pskl.UserSettings.COLOR_FORMAT, evt.target.value);
+  };
+
+  ns.MiscPreferencesController.prototype.onMaxFpsChange_ = function (evt) {
+    var target = evt.target;
+    var fps = parseInt(target.value, 10);
+    if (fps && !isNaN(fps)) {
+      pskl.UserSettings.set(pskl.UserSettings.MAX_FPS, fps);
+    } else {
+      target.value = pskl.UserSettings.get(pskl.UserSettings.MAX_FPS);
+    }
+  };
+
+  ns.MiscPreferencesController.prototype.onLayerOpacityChange_ = function (evt) {
+    var target = evt.target;
+    var opacity = parseFloat(target.value);
+    if (!isNaN(opacity)) {
+      pskl.UserSettings.set(pskl.UserSettings.LAYER_OPACITY, opacity);
+      pskl.UserSettings.set(pskl.UserSettings.LAYER_PREVIEW, opacity !== 0);
+      this.updateLayerOpacityText_(opacity);
+    } else {
+      target.value = pskl.UserSettings.get(pskl.UserSettings.LAYER_OPACITY);
+    }
+  };
+
+  ns.MiscPreferencesController.prototype.updateLayerOpacityText_ = function (opacity) {
+    var layerOpacityText = document.querySelector('.layer-opacity-text');
+    layerOpacityText.innerHTML = (opacity * 1).toFixed(2);
+  };
+})();

src/js/controller/settings/preferences/TilePreferencesController.js

@@ -0,0 +1,47 @@
+(function () {
+  var ns = $.namespace('pskl.controller.settings.preferences');
+
+  ns.TilePreferencesController = function (piskelController, preferencesController) {
+    this.piskelController = piskelController;
+    this.preferencesController = preferencesController;
+  };
+
+  pskl.utils.inherit(ns.TilePreferencesController, pskl.controller.settings.AbstractSettingController);
+
+  ns.TilePreferencesController.prototype.init = function () {
+    // Tile mode
+    var tileMode = pskl.UserSettings.get(pskl.UserSettings.SEAMLESS_MODE);
+    var tileModeCheckbox = document.querySelector('.tile-mode-checkbox');
+    if (tileMode) {
+      tileModeCheckbox.setAttribute('checked', tileMode);
+    }
+    this.addEventListener(tileModeCheckbox, 'change', this.onTileModeChange_);
+
+    // Tile mask opacity
+    var tileMaskOpacityInput = document.querySelector('.tile-mask-opacity-input');
+    tileMaskOpacityInput.value = pskl.UserSettings.get(pskl.UserSettings.SEAMLESS_OPACITY);
+    this.addEventListener(tileMaskOpacityInput, 'change', this.onTileMaskOpacityChange_);
+    this.addEventListener(tileMaskOpacityInput, 'input', this.onTileMaskOpacityChange_);
+    this.updateTileMaskOpacityText_(tileMaskOpacityInput.value);
+  };
+
+  ns.TilePreferencesController.prototype.onTileModeChange_ = function (evt) {
+    pskl.UserSettings.set(pskl.UserSettings.SEAMLESS_MODE, evt.currentTarget.checked);
+  };
+
+  ns.TilePreferencesController.prototype.onTileMaskOpacityChange_ = function (evt) {
+    var target = evt.target;
+    var opacity = parseFloat(target.value);
+    if (!isNaN(opacity)) {
+      pskl.UserSettings.set(pskl.UserSettings.SEAMLESS_OPACITY, opacity);
+      this.updateTileMaskOpacityText_(opacity);
+    } else {
+      target.value = pskl.UserSettings.get(pskl.UserSettings.SEAMLESS_OPACITY);
+    }
+  };
+
+  ns.TilePreferencesController.prototype.updateTileMaskOpacityText_ = function (opacity) {
+    var seamlessOpacityText = document.querySelector('.tile-mask-opacity-text');
+    seamlessOpacityText.innerHTML = (opacity * 1).toFixed(2);
+  };
+})();

src/js/controller/settings/resize/ResizeController.js

@@ -69,7 +69,9 @@
       resizeContent: this.resizeContentCheckbox.checked
     });
 
-    pskl.app.piskelController.setPiskel(piskel, true);
+    pskl.app.piskelController.setPiskel(piskel, {
+      preserveState: true
+    });
 
     $.publish(Events.CLOSE_SETTINGS_DRAWER);
   };

src/js/database/BackupDatabase.js

@@ -0,0 +1,258 @@
+(function () {
+  var ns = $.namespace('pskl.database');
+
+  var DB_NAME = 'PiskelSessionsDatabase';
+  var DB_VERSION = 1;
+
+  // Simple wrapper to promisify a request.
+  var _requestPromise = function (req) {
+    var deferred = Q.defer();
+    req.onsuccess = deferred.resolve.bind(deferred);
+    req.onerror = deferred.reject.bind(deferred);
+    return deferred.promise;
+  };
+
+  /**
+   * The BackupDatabase handles all the database interactions related
+   * to piskel snapshots continuously saved while during the usage of
+   * Piskel.
+   */
+  ns.BackupDatabase = function () {
+    this.db = null;
+  };
+
+  ns.BackupDatabase.DB_NAME = DB_NAME;
+
+  /**
+   * Open and initialize the database.
+   * Returns a promise that resolves when the database is opened.
+   */
+  ns.BackupDatabase.prototype.init = function () {
+    var request = window.indexedDB.open(DB_NAME, DB_VERSION);
+    request.onupgradeneeded = this.onUpgradeNeeded_.bind(this);
+
+    return _requestPromise(request).then(function (event) {
+      this.db = event.target.result;
+      return this.db;
+    }.bind(this)).catch(function (e) {
+      console.log('Could not initialize the piskel backup database');
+    });
+  };
+
+  ns.BackupDatabase.prototype.onUpgradeNeeded_ = function (event) {
+    // Set this.db early to allow migration scripts to access it in oncomplete.
+    this.db = event.target.result;
+
+    // Create an object store "piskels" with the autoIncrement flag set as true.
+    var objectStore = this.db.createObjectStore('snapshots', { keyPath: 'id', autoIncrement : true });
+
+    objectStore.createIndex('session_id', 'session_id', { unique: false });
+    objectStore.createIndex('date', 'date', { unique: false });
+    objectStore.createIndex('session_id, date', ['session_id', 'date'], { unique: false });
+
+    objectStore.transaction.oncomplete = function(event) {
+      // Nothing to do at the moment!
+    }.bind(this);
+  };
+
+  ns.BackupDatabase.prototype.openObjectStore_ = function () {
+    return this.db.transaction(['snapshots'], 'readwrite').objectStore('snapshots');
+  };
+
+  /**
+   * Send an add request for the provided snapshot.
+   * Returns a promise that resolves the request event.
+   */
+  ns.BackupDatabase.prototype.createSnapshot = function (snapshot) {
+    var objectStore = this.openObjectStore_();
+    var request = objectStore.add(snapshot);
+    return _requestPromise(request);
+  };
+
+  /**
+   * Send a put request for the provided snapshot.
+   * Returns a promise that resolves the request event.
+   */
+  ns.BackupDatabase.prototype.updateSnapshot = function (snapshot) {
+    var objectStore = this.openObjectStore_();
+    var request = objectStore.put(snapshot);
+    return _requestPromise(request);
+  };
+
+  /**
+   * Send a delete request for the provided snapshot.
+   * Returns a promise that resolves the request event.
+   */
+  ns.BackupDatabase.prototype.deleteSnapshot = function (snapshot) {
+    var objectStore = this.openObjectStore_();
+    var request = objectStore.delete(snapshot.id);
+    return _requestPromise(request);
+  };
+
+  /**
+   * Send a get request for the provided snapshotId.
+   * Returns a promise that resolves the request event.
+   */
+  ns.BackupDatabase.prototype.getSnapshot = function (snapshotId) {
+    var objectStore = this.openObjectStore_();
+    var request = objectStore.get(snapshotId);
+    return _requestPromise(request).then(function (event) {
+      return event.target.result;
+    });
+  };
+
+  /**
+   * Get the last (most recent) snapshot that satisfies the accept filter provided.
+   * Returns a promise that will resolve with the first matching snapshot (or null
+   * if no valid snapshot is found).
+   *
+   * @param {Function} accept:
+   *        Filter method that takes a snapshot as argument and should return true
+   *        if the snapshot is valid.
+   */
+  ns.BackupDatabase.prototype.findLastSnapshot = function (accept) {
+    // Create the backup promise.
+    var deferred = Q.defer();
+
+    // Open a transaction to the snapshots object store.
+    var objectStore = this.db.transaction(['snapshots']).objectStore('snapshots');
+
+    var index = objectStore.index('date');
+    var range = IDBKeyRange.upperBound(Infinity);
+    index.openCursor(range, 'prev').onsuccess = function(event) {
+      var cursor = event.target.result;
+      var snapshot = cursor && cursor.value;
+
+      // Resolve null if we couldn't find a matching snapshot.
+      if (!snapshot) {
+        deferred.resolve(null);
+      } else if (accept(snapshot)) {
+        deferred.resolve(snapshot);
+      } else {
+        cursor.continue();
+      }
+    };
+
+    return deferred.promise;
+  };
+
+  /**
+   * Retrieve all the snapshots for a given session id, sorted by descending date order.
+   * Returns a promise that resolves with an array of snapshots.
+   *
+   * @param {String} sessionId
+   *        The session id
+   */
+  ns.BackupDatabase.prototype.getSnapshotsBySessionId = function (sessionId) {
+    // Create the backup promise.
+    var deferred = Q.defer();
+
+    // Open a transaction to the snapshots object store.
+    var objectStore = this.db.transaction(['snapshots']).objectStore('snapshots');
+
+    // Loop on all the saved snapshots for the provided piskel id
+    var index = objectStore.index('session_id, date');
+    var keyRange = IDBKeyRange.bound(
+      [sessionId, 0],
+      [sessionId, Infinity]
+    );
+
+    var snapshots = [];
+    // Ordered by date in descending order.
+    index.openCursor(keyRange, 'prev').onsuccess = function(event) {
+      var cursor = event.target.result;
+      if (cursor) {
+        snapshots.push(cursor.value);
+        cursor.continue();
+      } else {
+        // Consumed all piskel snapshots
+        deferred.resolve(snapshots);
+      }
+    };
+
+    return deferred.promise;
+  };
+
+  ns.BackupDatabase.prototype.getSessions = function () {
+    // Create the backup promise.
+    var deferred = Q.defer();
+
+    // Open a transaction to the snapshots object store.
+    var objectStore = this.db.transaction(['snapshots']).objectStore('snapshots');
+
+    var sessions = {};
+
+    var _createSession = function (snapshot) {
+      sessions[snapshot.session_id] = {
+        startDate: snapshot.date,
+        endDate: snapshot.date,
+        name: snapshot.name,
+        description: snapshot.description,
+        id: snapshot.session_id,
+        count: 1
+      };
+    };
+
+    var _updateSession = function (snapshot) {
+      var s = sessions[snapshot.session_id];
+      s.startDate = Math.min(s.startDate, snapshot.date);
+      s.endDate = Math.max(s.endDate, snapshot.date);
+      s.count++;
+
+      if (s.endDate === snapshot.date) {
+        // If the endDate was updated, update also the session metadata to
+        // reflect the latest state.
+        s.name = snapshot.name;
+        s.description = snapshot.description;
+      }
+    };
+
+    var index = objectStore.index('date');
+    var range = IDBKeyRange.upperBound(Infinity);
+    index.openCursor(range, 'prev').onsuccess = function(event) {
+      var cursor = event.target.result;
+      var snapshot = cursor && cursor.value;
+      if (!snapshot) {
+        deferred.resolve(sessions);
+      } else {
+        if (sessions[snapshot.session_id]) {
+          _updateSession(snapshot);
+        } else {
+          _createSession(snapshot);
+        }
+        cursor.continue();
+      }
+    };
+
+    return deferred.promise.then(function (sessions) {
+      // Convert the sessions map to an array.
+      return Object.keys(sessions).map(function (key) {
+        return sessions[key];
+      });
+    });
+  };
+
+  ns.BackupDatabase.prototype.deleteSnapshotsForSession = function (sessionId) {
+    // Create the backup promise.
+    var deferred = Q.defer();
+
+    // Open a transaction to the snapshots object store.
+    var objectStore = this.openObjectStore_();
+
+    // Loop on all the saved snapshots for the provided piskel id
+    var index = objectStore.index('session_id');
+    var keyRange = IDBKeyRange.only(sessionId);
+
+    index.openCursor(keyRange).onsuccess = function(event) {
+      var cursor = event.target.result;
+      if (cursor) {
+        cursor.delete();
+        cursor.continue();
+      } else {
+        deferred.resolve();
+      }
+    };
+
+    return deferred.promise;
+  };
+})();

src/js/database/PiskelDatabase.js

@@ -0,0 +1,139 @@
+(function () {
+  var ns = $.namespace('pskl.database');
+
+  var DB_NAME = 'PiskelDatabase';
+  var DB_VERSION = 1;
+
+  // Simple wrapper to promisify a request.
+  var _requestPromise = function (req) {
+    var deferred = Q.defer();
+    req.onsuccess = deferred.resolve.bind(deferred);
+    req.onerror = deferred.reject.bind(deferred);
+    return deferred.promise;
+  };
+
+  /**
+   * The PiskelDatabase handles all the database interactions related
+   * to the local piskel saved that can be performed in-browser.
+   */
+  ns.PiskelDatabase = function (options) {
+    this.db = null;
+  };
+
+  ns.PiskelDatabase.DB_NAME = DB_NAME;
+
+  ns.PiskelDatabase.prototype.init = function () {
+    var request = window.indexedDB.open(DB_NAME, DB_VERSION);
+    request.onupgradeneeded = this.onUpgradeNeeded_.bind(this);
+
+    return _requestPromise(request).then(function (event) {
+      this.db = event.target.result;
+      return this.db;
+    }.bind(this));
+  };
+
+  ns.PiskelDatabase.prototype.onUpgradeNeeded_ = function (event) {
+    // Set this.db early to allow migration scripts to access it in oncomplete.
+    this.db = event.target.result;
+
+    // Create an object store "piskels" with the autoIncrement flag set as true.
+    var objectStore = this.db.createObjectStore('piskels', { keyPath : 'name' });
+    objectStore.transaction.oncomplete = function(event) {
+      pskl.database.migrate.MigrateLocalStorageToIndexedDb.migrate(this);
+    }.bind(this);
+  };
+
+  ns.PiskelDatabase.prototype.openObjectStore_ = function () {
+    return this.db.transaction(['piskels'], 'readwrite').objectStore('piskels');
+  };
+
+  /**
+   * Send a get request for the provided name.
+   * Returns a promise that resolves the request event.
+   */
+  ns.PiskelDatabase.prototype.get = function (name) {
+    var objectStore = this.openObjectStore_();
+    return _requestPromise(objectStore.get(name)).then(function (event) {
+      return event.target.result;
+    });
+  };
+
+  /**
+   * List all locally saved piskels.
+   * Returns a promise that resolves an array of objects:
+   * - name: name of the piskel
+   * - description: description of the piskel
+   * - date: save date
+   *
+   * The sprite content is not contained in the object and
+   * needs to be retrieved with a separate get.
+   */
+  ns.PiskelDatabase.prototype.list = function () {
+    var deferred = Q.defer();
+
+    var piskels = [];
+    var objectStore = this.openObjectStore_();
+    var cursor = objectStore.openCursor();
+    cursor.onsuccess = function(event) {
+      var cursor = event.target.result;
+      if (cursor) {
+        piskels.push({
+          name: cursor.value.name,
+          date: cursor.value.date,
+          description: cursor.value.description
+        });
+        cursor.continue();
+      } else {
+        // Cursor consumed all availabled piskels
+        deferred.resolve(piskels);
+      }
+    };
+
+    cursor.onerror = function () {
+      deferred.reject();
+    };
+
+    return deferred.promise;
+  };
+
+  /**
+   * Send an put request for the provided args.
+   * Returns a promise that resolves the request event.
+   */
+  ns.PiskelDatabase.prototype.update = function (name, description, date, serialized) {
+    var data = {};
+
+    data.name = name;
+    data.serialized = serialized;
+    data.date = date;
+    data.description = description;
+
+    var objectStore = this.openObjectStore_();
+    return _requestPromise(objectStore.put(data));
+  };
+
+  /**
+   * Send an add request for the provided args.
+   * Returns a promise that resolves the request event.
+   */
+  ns.PiskelDatabase.prototype.create = function (name, description, date, serialized) {
+    var data = {};
+
+    data.name = name;
+    data.serialized = serialized;
+    data.date = date;
+    data.description = description;
+
+    var objectStore = this.openObjectStore_();
+    return _requestPromise(objectStore.add(data));
+  };
+
+  /**
+   * Delete a saved piskel for the provided name.
+   * Returns a promise that resolves the request event.
+   */
+  ns.PiskelDatabase.prototype.delete = function (name) {
+    var objectStore = this.openObjectStore_();
+    return _requestPromise(objectStore.delete(name));
+  };
+})();

src/js/database/migrate/MigrateLocalStorageToIndexedDb.js

@@ -0,0 +1,76 @@
+(function () {
+  var ns = $.namespace('pskl.database.migrate');
+
+  // Simple migration helper to move local storage saves to indexed db.
+  ns.MigrateLocalStorageToIndexedDb = {};
+
+  ns.MigrateLocalStorageToIndexedDb.migrate = function (piskelDatabase) {
+    var deferred = Q.defer();
+
+    var localStorageService = pskl.app.localStorageService;
+
+    var localStorageKeys = localStorageService.getKeys();
+    var migrationData = localStorageKeys.map(function (key) {
+      return {
+        name: key.name,
+        description: key.description,
+        date: key.date,
+        serialized: localStorageService.getPiskel(key.name)
+      };
+    });
+
+    // Define the sequential migration process.
+    // Wait for each sprite to be saved before saving the next one.
+    var success = true;
+    var migrateSprite = function (index) {
+      var data = migrationData[index];
+      if (!data) {
+        console.log('Data migration from local storage to indexed db finished.');
+        if (success) {
+          console.log('Local storage piskels successfully migrated. Old copies will be deleted.');
+          ns.MigrateLocalStorageToIndexedDb.deleteLocalStoragePiskels();
+        }
+
+        deferred.resolve();
+      } else {
+        ns.MigrateLocalStorageToIndexedDb.save_(piskelDatabase, data)
+          .then(function () {
+            migrateSprite(index + 1);
+          })
+          .catch(function (e) {
+            var success = false;
+            console.error('Failed to migrate local storage sprite for name: ' + data.name);
+            migrateSprite(index + 1);
+          });
+      }
+    };
+
+    // Start the migration.
+    migrateSprite(0);
+
+    return deferred.promise;
+  };
+
+  ns.MigrateLocalStorageToIndexedDb.save_ = function (piskelDatabase, piskelData) {
+    return piskelDatabase.get(piskelData.name).then(function (data) {
+      if (typeof data !== 'undefined') {
+        return piskelDatabase.update(piskelData.name, piskelData.description, piskelData.date, piskelData.serialized);
+      } else {
+        return piskelDatabase.create(piskelData.name, piskelData.description, piskelData.date, piskelData.serialized);
+      }
+    });
+  };
+
+  ns.MigrateLocalStorageToIndexedDb.deleteLocalStoragePiskels = function () {
+    var localStorageKeys = pskl.app.localStorageService.getKeys();
+
+    // Remove all sprites.
+    localStorageKeys.forEach(function (key) {
+      window.localStorage.removeItem('piskel.' + key.name);
+    });
+
+    // Remove keys.
+    window.localStorage.removeItem('piskel.keys');
+  };
+
+})();

src/js/devtools/DrawingTestPlayer.js

@@ -32,6 +32,7 @@
   };
 
   ns.DrawingTestPlayer.prototype.setupInitialState_ = function () {
+
     var size = this.initialState.size;
     var piskel = this.createPiskel_(size.width, size.height);
     pskl.app.piskelController.setPiskel(piskel);
@@ -39,9 +40,10 @@
     $.publish(Events.SELECT_PRIMARY_COLOR, [this.initialState.primaryColor]);
     $.publish(Events.SELECT_SECONDARY_COLOR, [this.initialState.secondaryColor]);
     $.publish(Events.SELECT_TOOL, [this.initialState.selectedTool]);
-    if (this.initialState.penSize) {
-      pskl.app.penSizeService.setPenSize(this.initialState.penSize);
-    }
+
+    // Old tests do not have penSize stored in initialState, fallback to 1.
+    var penSize = this.initialState.penSize || 1;
+    pskl.app.penSizeService.setPenSize(this.initialState.penSize);
   };
 
   ns.DrawingTestPlayer.prototype.createPiskel_ = function (width, height) {
@@ -108,6 +110,8 @@
         this.playTransformToolEvent_(recordEvent);
       } else if (recordEvent.type === 'instrumented-event') {
         this.playInstrumentedEvent_(recordEvent);
+      } else if (recordEvent.type === 'clipboard-event') {
+        this.playClipboardEvent_(recordEvent);
       }
 
       // Record the time spent replaying the event
@@ -169,6 +173,16 @@
     pskl.app.piskelController[recordEvent.methodName].apply(pskl.app.piskelController, recordEvent.args);
   };
 
+  ns.DrawingTestPlayer.prototype.playClipboardEvent_ = function (recordEvent) {
+    $.publish(recordEvent.event.type, {
+      preventDefault: function () {},
+      clipboardData: {
+        items: [],
+        setData: function () {}
+      }
+    });
+  };
+
   ns.DrawingTestPlayer.prototype.onTestEnd_ = function () {
     this.removeMouseShim_();
     // Restore the original drawing loop.

src/js/devtools/DrawingTestRecorder.js

@@ -15,6 +15,10 @@
     $.subscribe(Events.TRANSFORMATION_EVENT, this.onTransformationEvent_.bind(this));
     $.subscribe(Events.PRIMARY_COLOR_SELECTED, this.onColorEvent_.bind(this, true));
     $.subscribe(Events.SECONDARY_COLOR_SELECTED, this.onColorEvent_.bind(this, false));
+    $.subscribe(Events.CLIPBOARD_COPY, this.onClipboardEvent_.bind(this));
+    $.subscribe(Events.CLIPBOARD_CUT, this.onClipboardEvent_.bind(this));
+    $.subscribe(Events.CLIPBOARD_PASTE, this.onClipboardEvent_.bind(this));
+
 
     for (var key in this.piskelController) {
       if (typeof this.piskelController[key] == 'function') {
@@ -85,7 +89,7 @@
         which : domEvent.which,
         shiftKey : domEvent.shiftKey,
         altKey : domEvent.altKey,
-        ctrlKey : domEvent.ctrlKey,
+        ctrlKey : domEvent.ctrlKey || domEvent.metaKey,
         target : {
           nodeName : domEvent.target.nodeName
         }
@@ -136,12 +140,27 @@
     }
   };
 
+  ns.DrawingTestRecorder.prototype.onClipboardEvent_ = function (evt) {
+    if (this.isRecording) {
+      var recordEvent = {};
+      recordEvent.type = 'clipboard-event';
+      recordEvent.event = evt;
+      this.events.push(recordEvent);
+    }
+  };
+
   ns.DrawingTestRecorder.prototype.onInstrumentedMethod_ = function (callee, methodName, args) {
     if (this.isRecording) {
       var recordEvent = {};
       recordEvent.type = 'instrumented-event';
       recordEvent.methodName = methodName;
       recordEvent.args = Array.prototype.slice.call(args, 0);
+
+      if (methodName === 'setPiskel' && args[1].noSnapshot) {
+        // Skip recording calls to setPiskel that don't trigger a save.
+        return;
+      }
+
       this.events.push(recordEvent);
     }
   };

src/js/model/Piskel.js

@@ -16,7 +16,7 @@
       this.descriptor = descriptor;
       this.savePath = null;
       this.fps = fps;
-
+      this.hiddenFrames = [];
     } else {
       throw 'Missing arguments in Piskel constructor : ' + Array.prototype.join.call(arguments, ',');
     }
@@ -82,20 +82,28 @@
     this.layers.splice(index, 0, layer);
   };
 
-  ns.Piskel.prototype.moveLayerUp = function (layer) {
+  ns.Piskel.prototype.moveLayerUp = function (layer, toTop) {
     var index = this.layers.indexOf(layer);
-    if (index > -1 && index < this.layers.length - 1) {
-      this.layers[index] = this.layers[index + 1];
-      this.layers[index + 1] = layer;
-    }
+    var toIndex = toTop ? this.layers.length - 1 : index + 1;
+    this.moveLayer_(index, toIndex);
   };
 
-  ns.Piskel.prototype.moveLayerDown = function (layer) {
+  ns.Piskel.prototype.moveLayerDown = function (layer, toBottom) {
     var index = this.layers.indexOf(layer);
-    if (index > 0) {
-      this.layers[index] = this.layers[index - 1];
-      this.layers[index - 1] = layer;
+    var toIndex = toBottom ? 0 : index - 1;
+    this.moveLayer_(index, toIndex);
+  };
+
+  /**
+   * Move the layer at the provided index to the provided toIndex.
+   */
+  ns.Piskel.prototype.moveLayer_ = function (fromIndex, toIndex) {
+    if (fromIndex == -1 || toIndex == -1 || fromIndex == toIndex) {
+      return;
     }
+    toIndex = pskl.utils.Math.minmax(toIndex, 0, this.layers.length - 1);
+    var layer = this.layers.splice(fromIndex, 1)[0];
+    this.layers.splice(toIndex, 0, layer);
   };
 
   ns.Piskel.prototype.removeLayer = function (layer) {

src/js/rendering/frame/BackgroundImageFrameRenderer.js

@@ -5,11 +5,10 @@
     this.container = container;
     this.setZoom(zoom);
 
-    var containerEl = container.get(0);
-    var containerDocument = containerEl.ownerDocument;
+    var containerDocument = container.ownerDocument;
     this.frameContainer = containerDocument.createElement('div');
     this.frameContainer.classList.add('background-image-frame-container');
-    container.get(0).appendChild(this.frameContainer);
+    container.appendChild(this.frameContainer);
 
     this.cachedFrameProcessor = new pskl.model.frame.CachedFrameProcessor();
     this.cachedFrameProcessor.setFrameProcessor(this.frameToDataUrl_.bind(this));

src/js/rendering/frame/CachedFrameRenderer.js

@@ -34,6 +34,8 @@
     var serializedFrame = [
       this.getZoom(),
       this.getGridWidth(),
+      this.getGridSpacing(),
+      this.getGridColor(),
       pskl.UserSettings.get('SEAMLESS_MODE'),
       pskl.UserSettings.get('SEAMLESS_OPACITY'),
       offset.x, offset.y,

src/js/rendering/frame/FrameRenderer.js

@@ -55,7 +55,8 @@
     this.displayCanvas = null;
     this.setDisplaySize(renderingOptions.width, renderingOptions.height);
 
-    this.setGridWidth(pskl.UserSettings.get(pskl.UserSettings.GRID_WIDTH));
+    this.setGridWidth(this.getUserGridWidth_());
+    this.setGridSpacing(this.getUserGridSpacing_());
 
     $.subscribe(Events.USER_SETTINGS_CHANGED, this.onUserSettingsChange_.bind(this));
   };
@@ -106,7 +107,7 @@
     this.displayWidth = width;
     this.displayHeight = height;
     if (this.displayCanvas) {
-      $(this.displayCanvas).remove();
+      this.displayCanvas.parentNode.removeChild(this.displayCanvas);
       this.displayCanvas = null;
     }
     this.createDisplayCanvas_();
@@ -138,10 +139,18 @@
     this.offset.y = y;
   };
 
+  ns.FrameRenderer.prototype.getGridColor = function () {
+    return pskl.UserSettings.get(pskl.UserSettings.GRID_COLOR);
+  };
+
   ns.FrameRenderer.prototype.setGridWidth = function (value) {
     this.gridWidth_ = value;
   };
 
+  ns.FrameRenderer.prototype.setGridSpacing = function (value) {
+    this.gridSpacing_ = value;
+  };
+
   ns.FrameRenderer.prototype.getGridWidth = function () {
     if (!this.supportGridRendering) {
       return 0;
@@ -150,15 +159,29 @@
     return this.gridWidth_;
   };
 
+  ns.FrameRenderer.prototype.getGridSpacing = function () {
+    if (!this.supportGridRendering) {
+      return 0;
+    }
+
+    return this.gridSpacing_;
+  };
+
   /**
    * Compute a grid width value best suited to the current display context,
    * particularly for the current zoom level
    */
   ns.FrameRenderer.prototype.computeGridWidthForDisplay_ = function () {
+    var gridSpacing = this.getGridSpacing();
+    if (this.zoom * gridSpacing < 6) {
+      return 0;
+    }
+
     var gridWidth = this.getGridWidth();
-    while (this.zoom < 6 * gridWidth) {
+    while (gridWidth > 1 && this.zoom < 6 * gridWidth) {
       gridWidth--;
     }
+
     return gridWidth;
   };
 
@@ -176,24 +199,40 @@
 
     this.displayCanvas = pskl.utils.CanvasUtils.createCanvas(width, height, this.classList);
     pskl.utils.CanvasUtils.disableImageSmoothing(this.displayCanvas);
-    this.container.append(this.displayCanvas);
+    this.container.appendChild(this.displayCanvas);
   };
 
   ns.FrameRenderer.prototype.onUserSettingsChange_ = function (evt, settingName, settingValue) {
-    if (settingName == pskl.UserSettings.GRID_WIDTH) {
-      this.setGridWidth(settingValue);
+    var settings = pskl.UserSettings;
+    if (settingName == settings.GRID_WIDTH ||
+        settingName == settings.GRID_SPACING ||
+        settingName == settings.GRID_ENABLED) {
+      this.setGridWidth(this.getUserGridWidth_());
+      this.setGridSpacing(this.getUserGridSpacing_());
     }
   };
 
+  ns.FrameRenderer.prototype.getUserGridWidth_ = function () {
+    var gridEnabled = pskl.UserSettings.get(pskl.UserSettings.GRID_ENABLED);
+    var width = pskl.UserSettings.get(pskl.UserSettings.GRID_WIDTH);
+    return gridEnabled ? width : 0;
+  };
+
+  ns.FrameRenderer.prototype.getUserGridSpacing_ = function () {
+    var gridEnabled = pskl.UserSettings.get(pskl.UserSettings.GRID_ENABLED);
+    var spacing = pskl.UserSettings.get(pskl.UserSettings.GRID_SPACING);
+    return gridEnabled ? spacing : 0;
+  };
+
   /**
    * Transform a screen pixel-based coordinate (relative to the top-left corner of the rendered
    * frame) into a sprite coordinate in column and row.
    * @public
    */
   ns.FrameRenderer.prototype.getCoordinates = function(x, y) {
-    var containerOffset = this.container.offset();
-    x = x - containerOffset.left;
-    y = y - containerOffset.top;
+    var containerRect = this.container.getBoundingClientRect();
+    x = x - containerRect.left;
+    y = y - containerRect.top;
 
     // apply margins
     x = x - this.margin.x;
@@ -222,9 +261,9 @@
     x = x + this.margin.x;
     y = y + this.margin.y;
 
-    var containerOffset = this.container.offset();
-    x = x + containerOffset.left;
-    y = y + containerOffset.top;
+    var containerRect = this.container.getBoundingClientRect();
+    x = x + containerRect.left;
+    y = y + containerRect.top;
 
     return {
       x : x + (cellSize / 2),
@@ -258,7 +297,7 @@
     var isZoomedOut = translateX > 0 || translateY > 0;
     // Draw the background / zoomed-out color only if needed. Otherwise the clearRect
     // happening after that will clear "out of bounds" and seems to be doing nothing
-    // on some chromebooks (cf https://github.com/juliandescottes/piskel/issues/651)
+    // on some chromebooks (cf https://github.com/piskelapp/piskel/issues/651)
     if (isZoomedOut) {
       // Draw background
       displayContext.fillStyle = Constants.ZOOMED_OUT_BACKGROUND_COLOR;
@@ -287,16 +326,31 @@
 
     // Draw grid.
     var gridWidth = this.computeGridWidthForDisplay_();
+    var gridSpacing = this.getGridSpacing();
     if (gridWidth > 0) {
+      var gridColor = this.getGridColor();
       // Scale out before drawing the grid.
       displayContext.scale(1 / z, 1 / z);
-      // Clear vertical lines.
-      for (var i = 1 ; i < frame.getWidth() ; i++) {
-        displayContext.clearRect((i * z) - (gridWidth / 2), 0, gridWidth, h * z);
+
+      var drawOrClear;
+      if (gridColor === Constants.TRANSPARENT_COLOR) {
+        drawOrClear = displayContext.clearRect.bind(displayContext);
+      } else {
+        displayContext.fillStyle = gridColor;
+        drawOrClear = displayContext.fillRect.bind(displayContext);
       }
-      // Clear horizontal lines.
+
+      // Draw or clear vertical lines.
+      for (var i = 1 ; i < frame.getWidth() ; i++) {
+        if (i % gridSpacing == 0) {
+          drawOrClear((i * z) - (gridWidth / 2), 0, gridWidth, h * z);
+        }
+      }
+      // Draw or clear horizontal lines.
       for (var j = 1 ; j < frame.getHeight() ; j++) {
-        displayContext.clearRect(0, (j * z) - (gridWidth / 2), w * z, gridWidth);
+        if (j % gridSpacing == 0) {
+          drawOrClear(0, (j * z) - (gridWidth / 2), w * z, gridWidth);
+        }
       }
     }
 

src/js/rendering/layer/LayersRenderer.js

@@ -23,7 +23,7 @@
     this.updateLayersCanvasOpacity_(pskl.UserSettings.get(pskl.UserSettings.LAYER_OPACITY));
 
     $.subscribe(Events.PISKEL_RESET, this.flush.bind(this));
-    $.subscribe(Events.USER_SETTINGS_CHANGED, $.proxy(this.onUserSettingsChange_, this));
+    $.subscribe(Events.USER_SETTINGS_CHANGED, this.onUserSettingsChange_.bind(this));
   };
 
   pskl.utils.inherit(pskl.rendering.layer.LayersRenderer, pskl.rendering.CompositeRenderer);

src/js/selection/BaseSelection.js

@@ -5,9 +5,23 @@
     this.reset();
   };
 
+  ns.BaseSelection.prototype.stringify = function () {
+    return JSON.stringify({
+      pixels: this.pixels,
+      time: this.time
+    });
+  };
+
+  ns.BaseSelection.prototype.parse = function (str) {
+    var selectionData = JSON.parse(str);
+    this.pixels = selectionData.pixels;
+    this.time = selectionData.time;
+  };
+
   ns.BaseSelection.prototype.reset = function () {
     this.pixels = [];
     this.hasPastedContent = false;
+    this.time = -1;
   };
 
   ns.BaseSelection.prototype.move = function (colDiff, rowDiff) {
@@ -30,5 +44,8 @@
     });
 
     this.hasPastedContent = true;
+    // Keep track of the selection time to compare between local selection and
+    // paste event selections.
+    this.time = Date.now();
   };
 })();

src/js/selection/SelectionManager.js

@@ -14,21 +14,18 @@
   };
 
   ns.SelectionManager.prototype.init = function () {
-    $.subscribe(Events.SELECTION_CREATED, $.proxy(this.onSelectionCreated_, this));
-    $.subscribe(Events.SELECTION_DISMISSED, $.proxy(this.onSelectionDismissed_, this));
-    $.subscribe(Events.SELECTION_MOVE_REQUEST, $.proxy(this.onSelectionMoved_, this));
-    $.subscribe(Events.SELECTION_COPY, this.copy.bind(this));
-    $.subscribe(Events.SELECTION_CUT, this.cut.bind(this));
-    $.subscribe(Events.SELECTION_PASTE, this.paste.bind(this));
+    $.subscribe(Events.SELECTION_CREATED, this.onSelectionCreated_.bind(this));
+    $.subscribe(Events.SELECTION_DISMISSED, this.onSelectionDismissed_.bind(this));
+    $.subscribe(Events.SELECTION_MOVE_REQUEST, this.onSelectionMoved_.bind(this));
+    $.subscribe(Events.CLIPBOARD_COPY, this.copy.bind(this));
+    $.subscribe(Events.CLIPBOARD_CUT, this.copy.bind(this));
+    $.subscribe(Events.CLIPBOARD_PASTE, this.paste.bind(this));
 
     var shortcuts = pskl.service.keyboard.Shortcuts;
-    pskl.app.shortcutService.registerShortcut(shortcuts.SELECTION.PASTE, this.paste.bind(this));
-    pskl.app.shortcutService.registerShortcut(shortcuts.SELECTION.CUT, this.cut.bind(this));
-    pskl.app.shortcutService.registerShortcut(shortcuts.SELECTION.COPY, this.copy.bind(this));
     pskl.app.shortcutService.registerShortcut(shortcuts.SELECTION.DELETE, this.onDeleteShortcut_.bind(this));
     pskl.app.shortcutService.registerShortcut(shortcuts.SELECTION.COMMIT, this.commit.bind(this));
 
-    $.subscribe(Events.TOOL_SELECTED, $.proxy(this.onToolSelected_, this));
+    $.subscribe(Events.TOOL_SELECTED, this.onToolSelected_.bind(this));
   };
 
   /**
@@ -78,29 +75,85 @@
       scope : this,
       replay : {
         type : SELECTION_REPLAY.ERASE,
-        pixels : JSON.parse(JSON.stringify(pixels.slice(0)))
+        pixels : JSON.parse(JSON.stringify(pixels))
       }
     });
   };
 
-  ns.SelectionManager.prototype.cut = function() {
-    if (this.currentSelection) {
-      // Put cut target into the selection:
+  ns.SelectionManager.prototype.copy = function(event, domEvent) {
+    if (this.currentSelection && this.piskelController.getCurrentFrame()) {
       this.currentSelection.fillSelectionFromFrame(this.piskelController.getCurrentFrame());
-      this.erase();
+      if (domEvent) {
+        domEvent.clipboardData.setData('text/plain', this.currentSelection.stringify());
+        domEvent.preventDefault();
+      }
+      if (event.type === Events.CLIPBOARD_CUT) {
+        this.erase();
+      }
     }
   };
 
-  ns.SelectionManager.prototype.paste = function() {
-    if (!this.currentSelection || !this.currentSelection.hasPastedContent) {
-      if (window.localStorage.getItem('piskel.clipboard')) {
-        this.currentSelection = JSON.parse(window.localStorage.getItem('piskel.clipboard'));
-      } else {
-        return;
+  ns.SelectionManager.prototype.paste = function(event, domEvent) {
+    var items = domEvent ? domEvent.clipboardData.items : [];
+
+    try {
+      for (var i = 0 ; i < items.length ; i++) {
+        var item = items[i];
+
+        if (/^image/i.test(item.type)) {
+          this.pasteImage_(item);
+          event.stopPropagation();
+          return;
+        }
+
+        if (/^text\/plain/i.test(item.type)) {
+          this.pasteText_(item);
+          event.stopPropagation();
+          return;
+        }
       }
+    } catch (e) {
+      // Some of the clipboard APIs are not available on Safari/IE
+      // Allow Piskel to fallback on local currentSelection pasting.
     }
 
-    var pixels = this.currentSelection.pixels;
+    // temporarily keeping this code path for tests and fallbacks.
+    if (this.currentSelection && this.currentSelection.hasPastedContent) {
+      this.pastePixelsOnCurrentFrame_(this.currentSelection.pixels);
+    }
+  };
+
+  ns.SelectionManager.prototype.pasteImage_ = function(clipboardItem) {
+    var blob = clipboardItem.getAsFile();
+    pskl.utils.FileUtils.readImageFile(blob, function (image) {
+      pskl.app.fileDropperService.dropPosition_ = {x: 0, y: 0};
+      pskl.app.fileDropperService.onImageLoaded_(image, blob);
+    }.bind(this));
+  };
+
+  ns.SelectionManager.prototype.pasteText_ = function(clipboardItem) {
+    var blob = clipboardItem.getAsString(function (selectionString) {
+      var selectionData = JSON.parse(selectionString);
+      var time = selectionData.time;
+      var pixels = selectionData.pixels;
+
+      if (this.currentSelection && this.currentSelection.time >= time) {
+        // If the local selection is newer or equal to the one coming from the clipboard event
+        // use the local one. The reason is that the "move" information is only updated locally
+        // without synchronizing it to the clipboard.
+        // TODO: the selection should store the origin of the selection and the selection itself
+        // separately.
+        pixels = this.currentSelection.pixels;
+      }
+
+      if (pixels) {
+        // If the current clipboard data is some random text, pixels will not be defined.
+        this.pastePixelsOnCurrentFrame_(pixels);
+      }
+    }.bind(this));
+  };
+
+  ns.SelectionManager.prototype.pastePixelsOnCurrentFrame_ = function (pixels) {
     var frame = this.piskelController.getCurrentFrame();
 
     this.pastePixels_(frame, pixels);
@@ -123,8 +176,7 @@
     var tool = pskl.app.drawingController.currentToolBehavior;
     var isSelectionTool = tool instanceof pskl.tools.drawing.selection.BaseSelect;
     if (isSelectionTool) {
-      var overlay = pskl.app.drawingController.overlayFrame;
-      tool.commitSelection(overlay);
+      tool.commitSelection();
     }
   };
 
@@ -147,13 +199,6 @@
     });
   };
 
-  ns.SelectionManager.prototype.copy = function() {
-    if (this.currentSelection && this.piskelController.getCurrentFrame()) {
-      this.currentSelection.fillSelectionFromFrame(this.piskelController.getCurrentFrame());
-      window.localStorage.setItem('piskel.clipboard', JSON.stringify(this.currentSelection));
-    }
-  };
-
   /**
    * @private
    */

src/js/service/BackupService.js

@@ -1,65 +1,161 @@
 (function () {
   var ns = $.namespace('pskl.service');
 
-  // 1 minute = 1000 * 60
-  var BACKUP_INTERVAL = 1000 * 60;
+  var ONE_SECOND = 1000;
+  var ONE_MINUTE = 60 * ONE_SECOND;
 
-  ns.BackupService = function (piskelController) {
+  // Save every minute = 1000 * 60
+  var BACKUP_INTERVAL = ONE_MINUTE;
+  // Store a new snapshot every 5 minutes.
+  var SNAPSHOT_INTERVAL = ONE_MINUTE * 5;
+  // Store up to 12 snapshots for a piskel session, min. 1 hour of work
+  var MAX_SNAPSHOTS_PER_SESSION = 12;
+  var MAX_SESSIONS = 10;
+
+  ns.BackupService = function (piskelController, backupDatabase) {
     this.piskelController = piskelController;
-    this.lastHash = null;
+    // Immediately store the current when initializing the Service to avoid storing
+    // empty sessions.
+    this.lastHash = this.piskelController.getPiskel().getHash();
+    this.nextSnapshotDate = -1;
+
+    // backupDatabase can be provided for testing purposes.
+    this.backupDatabase = backupDatabase || new pskl.database.BackupDatabase();
   };
 
   ns.BackupService.prototype.init = function () {
-    var previousPiskel = window.localStorage.getItem('bkp.next.piskel');
-    var previousInfo = window.localStorage.getItem('bkp.next.info');
-    if (previousPiskel && previousInfo) {
-      this.savePiskel_('prev', previousPiskel, previousInfo);
-    }
+    this.backupDatabase.init().then(function () {
+      window.setInterval(this.backup.bind(this), BACKUP_INTERVAL);
+    }.bind(this));
+  };
 
-    window.setInterval(this.backup.bind(this), BACKUP_INTERVAL);
+  // This is purely exposed for testing, so that backup dates can be set programmatically.
+  ns.BackupService.prototype.currentDate_ = function () {
+    return Date.now();
   };
 
   ns.BackupService.prototype.backup = function () {
     var piskel = this.piskelController.getPiskel();
-    var descriptor = piskel.getDescriptor();
     var hash = piskel.getHash();
-    var info = {
-      name : descriptor.name,
-      description : descriptor.info,
-      date : Date.now(),
-      hash : hash
-    };
 
     // Do not save an unchanged piskel
-    if (hash !== this.lastHash) {
-      this.lastHash = hash;
-      var serializedPiskel = pskl.utils.serialization.Serializer.serialize(piskel);
-      this.savePiskel_('next', serializedPiskel, JSON.stringify(info));
+    if (hash === this.lastHash) {
+      return Q.resolve();
     }
-  };
 
-  ns.BackupService.prototype.getPreviousPiskelInfo = function () {
-    var previousInfo = window.localStorage.getItem('bkp.prev.info');
-    if (previousInfo) {
-      return JSON.parse(previousInfo);
-    }
-  };
+    // Update the hash
+    // TODO: should only be done after a successful save.
+    this.lastHash = hash;
 
-  ns.BackupService.prototype.load = function() {
-    var previousPiskel = window.localStorage.getItem('bkp.prev.piskel');
-    previousPiskel = JSON.parse(previousPiskel);
+    // Prepare the backup snapshot.
+    var descriptor = piskel.getDescriptor();
+    var date = this.currentDate_();
+    var snapshot = {
+      session_id: pskl.app.sessionId,
+      date: date,
+      name: descriptor.name,
+      description: descriptor.description,
+      frames: piskel.getFrameCount(),
+      width: piskel.getWidth(),
+      height: piskel.getHeight(),
+      fps: piskel.getFPS(),
+      serialized: pskl.utils.serialization.Serializer.serialize(piskel)
+    };
 
-    pskl.utils.serialization.Deserializer.deserialize(previousPiskel, function (piskel) {
-      pskl.app.piskelController.setPiskel(piskel);
+    return this.getSnapshotsBySessionId(pskl.app.sessionId).then(function (snapshots) {
+      var latest = snapshots[0];
+
+      if (latest && date < this.nextSnapshotDate) {
+        // update the latest snapshot
+        snapshot.id = latest.id;
+        return this.backupDatabase.updateSnapshot(snapshot);
+      } else {
+        // add a new snapshot
+        this.nextSnapshotDate = date + SNAPSHOT_INTERVAL;
+        return this.backupDatabase.createSnapshot(snapshot).then(function () {
+          if (snapshots.length >= MAX_SNAPSHOTS_PER_SESSION) {
+            // remove oldest snapshot
+            return this.backupDatabase.deleteSnapshot(snapshots[snapshots.length - 1]);
+          }
+        }.bind(this)).then(function () {
+          var isNewSession = !latest;
+          if (!isNewSession) {
+            return;
+          }
+          return this.backupDatabase.getSessions().then(function (sessions) {
+            if (sessions.length <= MAX_SESSIONS) {
+              // If MAX_SESSIONS has not been reached, no need to delete
+              // previous sessions.
+              return;
+            }
+
+            // Prepare an array containing all the ids of the sessions to be deleted.
+            var sessionIdsToDelete = sessions.sort(function (s1, s2) {
+              return s1.startDate - s2.startDate;
+            }).map(function (s) {
+              return s.id;
+            }).slice(0, sessions.length - MAX_SESSIONS);
+
+            // Delete all the extra sessions.
+            return Q.all(sessionIdsToDelete.map(function (id) {
+              return this.deleteSession(id);
+            }.bind(this)));
+          }.bind(this));
+        }.bind(this));
+      }
+    }.bind(this)).catch(function (e) {
+      console.error(e);
     });
   };
 
-  ns.BackupService.prototype.savePiskel_ = function (type, piskel, info) {
-    try {
-      window.localStorage.setItem('bkp.' + type + '.piskel', piskel);
-      window.localStorage.setItem('bkp.' + type + '.info', info);
-    } catch (e) {
-      console.error('Could not save piskel backup in localStorage.', e);
-    }
+  ns.BackupService.prototype.getSnapshotsBySessionId = function (sessionId) {
+    return this.backupDatabase.getSnapshotsBySessionId(sessionId);
+  };
+
+  ns.BackupService.prototype.deleteSession = function (sessionId) {
+    return this.backupDatabase.deleteSnapshotsForSession(sessionId);
+  };
+
+  ns.BackupService.prototype.getPreviousPiskelInfo = function () {
+    return this.backupDatabase.findLastSnapshot(function (snapshot) {
+      return snapshot.session_id !== pskl.app.sessionId;
+    });
+  };
+
+  ns.BackupService.prototype.list = function() {
+    return this.backupDatabase.getSessions();
+  };
+
+  ns.BackupService.prototype.loadSnapshotById = function(snapshotId) {
+    var deferred = Q.defer();
+
+    this.backupDatabase.getSnapshot(snapshotId).then(function (snapshot) {
+      pskl.utils.serialization.Deserializer.deserialize(
+        JSON.parse(snapshot.serialized),
+        function (piskel) {
+          pskl.app.piskelController.setPiskel(piskel);
+          deferred.resolve();
+        }
+      );
+    });
+
+    return deferred.promise;
+  };
+
+  // Load "latest" backup snapshot.
+  ns.BackupService.prototype.load = function() {
+    var deferred = Q.defer();
+
+    this.getPreviousPiskelInfo().then(function (snapshot) {
+      pskl.utils.serialization.Deserializer.deserialize(
+        JSON.parse(snapshot.serialized),
+        function (piskel) {
+          pskl.app.piskelController.setPiskel(piskel);
+          deferred.resolve();
+        }
+      );
+    });
+
+    return deferred.promise;
   };
 })();

src/js/service/BeforeUnloadService.js

@@ -30,9 +30,11 @@
   };
 
   ns.BeforeUnloadService.prototype.onBeforeUnload = function (evt) {
+    // Attempt one last backup. Some of it may fail due to the asynchronous
+    // nature of IndexedDB.
     pskl.app.backupService.backup();
     if (pskl.app.savedStatusService.isDirty()) {
-      var confirmationMessage = 'Your Piskel seems to have unsaved changes';
+      var confirmationMessage = 'Your current sprite has unsaved changes. Are you sure you want to quit?';
 
       evt = evt || window.event;
       if (evt) {

src/js/service/ClipboardService.js

@@ -0,0 +1,25 @@
+(function () {
+  var ns = $.namespace('pskl.service');
+
+  ns.ClipboardService = function (piskelController) {
+    this.piskelController = piskelController;
+  };
+
+  ns.ClipboardService.prototype.init = function () {
+    window.addEventListener('copy', this._onCopy.bind(this), true);
+    window.addEventListener('cut', this._onCut.bind(this), true);
+    window.addEventListener('paste', this._onPaste.bind(this), true);
+  };
+
+  ns.ClipboardService.prototype._onCut = function (event) {
+    $.publish(Events.CLIPBOARD_CUT, event);
+  };
+
+  ns.ClipboardService.prototype._onCopy = function (event) {
+    $.publish(Events.CLIPBOARD_COPY, event);
+  };
+
+  ns.ClipboardService.prototype._onPaste = function (event) {
+    $.publish(Events.CLIPBOARD_PASTE, event);
+  };
+})();

src/js/service/CurrentColorsService.js

@@ -83,21 +83,21 @@
     batchAll(frames, function (frame) {
       return this.cachedFrameProcessor.get(frame);
     }.bind(this))
-    .then(function (results) {
-      var colors = {};
-      results.forEach(function (result) {
-        Object.keys(result).forEach(function (color) {
-          colors[color] = true;
+      .then(function (results) {
+        var colors = {};
+        results.forEach(function (result) {
+          Object.keys(result).forEach(function (color) {
+            colors[color] = true;
+          });
         });
-      });
-      // Remove transparent color from used colors
-      delete colors[pskl.utils.colorToInt(Constants.TRANSPARENT_COLOR)];
+        // Remove transparent color from used colors
+        delete colors[pskl.utils.colorToInt(Constants.TRANSPARENT_COLOR)];
 
-      var hexColors = Object.keys(colors).map(function (color) {
-        return pskl.utils.intToHex(color);
-      });
-      this.setCurrentColors(hexColors);
-    }.bind(this));
+        var hexColors = Object.keys(colors).map(function (color) {
+          return pskl.utils.intToHex(color);
+        });
+        this.setCurrentColors(hexColors);
+      }.bind(this));
   };
 
   ns.CurrentColorsService.prototype.isCurrentColorsPaletteSelected_ = function () {

src/js/service/FileDropperService.js

@@ -35,13 +35,9 @@
       var isPiskel = /\.piskel$/i.test(file.name);
       var isPalette = /\.(gpl|txt|pal)$/i.test(file.name);
       if (isImage) {
-        $.publish(Events.DIALOG_SHOW, {
-          dialogId : 'import',
-          initArgs : {
-            rawFiles: [file]
-          }
-        });
-        // pskl.utils.FileUtils.readImageFile(file, this.onImageLoaded_.bind(this));
+        pskl.utils.FileUtils.readImageFile(file, function (image) {
+          this.onImageLoaded_(image, file);
+        }.bind(this));
       } else if (isPiskel) {
         pskl.utils.PiskelFileUtils.loadFromFile(file, this.onPiskelFileLoaded_, this.onPiskelFileError_);
       } else if (isPalette) {
@@ -56,7 +52,7 @@
   };
 
   ns.FileDropperService.prototype.onPiskelFileLoaded_ = function (piskel) {
-    if (window.confirm('This will replace your current animation')) {
+    if (window.confirm(Constants.CONFIRM_OVERWRITE)) {
       pskl.app.piskelController.setPiskel(piskel);
     }
   };
@@ -65,10 +61,23 @@
     $.publish(Events.PISKEL_FILE_IMPORT_FAILED, [reason]);
   };
 
-  ns.FileDropperService.prototype.onImageLoaded_ = function (importedImage) {
+  ns.FileDropperService.prototype.onImageLoaded_ = function (importedImage, file) {
+    var piskelWidth = pskl.app.piskelController.getWidth();
+    var piskelHeight = pskl.app.piskelController.getHeight();
+
     if (this.isMultipleFiles_) {
       this.piskelController.addFrameAtCurrentIndex();
       this.piskelController.selectNextFrame();
+    } else if (importedImage.width > piskelWidth || importedImage.height > piskelHeight) {
+      // For single file imports, if the file is too big, trigger the import wizard.
+      $.publish(Events.DIALOG_SHOW, {
+        dialogId : 'import',
+        initArgs : {
+          rawFiles: [file]
+        }
+      });
+
+      return;
     }
 
     var currentFrame = this.piskelController.getCurrentFrame();

src/js/service/ImageUploadService.js

@@ -15,10 +15,17 @@
       data : imageData
     };
 
+    var protocol = pskl.utils.Environment.isHttps() ? 'https' : 'http';
     var wrappedSuccess = function (response) {
-      success(Constants.IMAGE_SERVICE_GET_URL + response.responseText);
+      var getUrl = pskl.utils.Template.replace(Constants.IMAGE_SERVICE_GET_URL, {
+        protocol: protocol
+      });
+      success(getUrl + response.responseText);
     };
 
-    pskl.utils.Xhr.post(Constants.IMAGE_SERVICE_UPLOAD_URL, data, wrappedSuccess, error);
+    var uploadUrl = pskl.utils.Template.replace(Constants.IMAGE_SERVICE_UPLOAD_URL, {
+      protocol: protocol
+    });
+    pskl.utils.Xhr.post(uploadUrl, data, wrappedSuccess, error);
   };
 })();

src/js/service/ImportService.js

@@ -97,15 +97,15 @@
    * @private
    */
   ns.ImportService.prototype.createImagesFromSheet_ = function (image,
-      frameSizeX, frameSizeY, frameOffsetX, frameOffsetY) {
+    frameSizeX, frameSizeY, frameOffsetX, frameOffsetY) {
     return pskl.utils.CanvasUtils.createFramesFromImage(
-        image,
-        frameOffsetX,
-        frameOffsetY,
-        frameSizeX,
-        frameSizeY,
-        /*useHorizonalStrips=*/ true,
-        /*ignoreEmptyFrames=*/ true);
+      image,
+      frameOffsetX,
+      frameOffsetY,
+      frameSizeX,
+      frameSizeY,
+      /*useHorizonalStrips=*/ true,
+      /*ignoreEmptyFrames=*/ true);
   };
 
   /**
@@ -116,7 +116,7 @@
    * @private
    */
   ns.ImportService.prototype.createPiskelFromImages_ = function (images, name,
-      frameSizeX, frameSizeY, smoothing) {
+    frameSizeX, frameSizeY, smoothing) {
     name = name || 'Imported piskel';
     var frames = this.createFramesFromImages_(images, frameSizeX, frameSizeY, smoothing);
     var layer = pskl.model.Layer.fromFrames('Layer 1', frames);

src/js/service/keyboard/KeycodeTranslator.js

@@ -3,6 +3,7 @@
     8 : 'back',
     13 : 'enter',
     27 : 'esc',
+    32 : 'space',
     37 : 'left',
     38 : 'up',
     39 : 'right',

src/js/service/keyboard/ShortcutService.js

@@ -9,7 +9,7 @@
    * @public
    */
   ns.ShortcutService.prototype.init = function() {
-    $(document.body).keydown($.proxy(this.onKeyDown_, this));
+    document.body.addEventListener('keydown', this.onKeyDown_.bind(this));
   };
 
   /**