piskel/js/controller/settings/ImportController.js
jdescottes 4a1a7b6c2b fix : reduce piskel model size : ImportController
+ ImportController is no longer relying on the deserializer to build a
  piskel instance
+ Static builders have been added to Piskel and Layer to help easily
  create new instances from existing elements
2013-11-14 23:03:29 +01:00

170 lines
5.7 KiB
JavaScript

(function () {
var ns = $.namespace('pskl.controller.settings');
var DEFAULT_FILE_STATUS = 'No file selected ...';
var PREVIEW_HEIGHT = 60;
ns.ImportController = function (piskelController) {
this.piskelController = piskelController;
this.importedImage_ = null;
};
ns.ImportController.prototype.init = function () {
this.importForm = $('[name=import-form]');
this.hiddenFileInput = $('[name=file-upload-input]');
this.fileInputButton = $('.file-input-button');
this.fileInputStatus = $('.file-input-status');
this.fileInputStatus.html(DEFAULT_FILE_STATUS);
this.importPreview = $('.import-section-preview');
this.resizeWidth = $('[name=resize-width]');
this.resizeHeight = $('[name=resize-height]');
this.smoothResize = $('[name=smooth-resize-checkbox]');
this.submitButton = $('[name=import-submit]');
this.importForm.submit(this.onImportFormSubmit_.bind(this));
this.hiddenFileInput.change(this.onFileUploadChange_.bind(this));
this.fileInputButton.click(this.onFileInputClick_.bind(this));
this.resizeWidth.keyup(this.onResizeInputKeyUp_.bind(this, 'width'));
this.resizeHeight.keyup(this.onResizeInputKeyUp_.bind(this, 'height'));
};
ns.ImportController.prototype.reset_ = function () {
this.importForm.get(0).reset();
this.fileInputStatus.html(DEFAULT_FILE_STATUS);
$.publish(Events.CLOSE_SETTINGS_DRAWER);
};
ns.ImportController.prototype.onResizeInputKeyUp_ = function (from, evt) {
if (this.importedImage_) {
this.synchronizeResizeFields_(evt.target.value, from);
}
};
ns.ImportController.prototype.synchronizeResizeFields_ = function (value, from) {
value = parseInt(value, 10);
if (isNaN(value)) {
value = 0;
}
var height = this.importedImage_.height, width = this.importedImage_.width;
if (from === 'width') {
this.resizeHeight.val(Math.round(value * height / width));
} else {
this.resizeWidth.val(Math.round(value * width / height));
}
};
ns.ImportController.prototype.onImportFormSubmit_ = function (evt) {
evt.originalEvent.preventDefault();
this.importImageToPiskel_();
};
ns.ImportController.prototype.onFileUploadChange_ = function (evt) {
this.importFromFile_();
};
ns.ImportController.prototype.onFileInputClick_ = function (evt) {
this.hiddenFileInput.click();
};
ns.ImportController.prototype.importFromFile_ = function () {
var files = this.hiddenFileInput.get(0).files;
if (files.length == 1) {
var file = files[0];
if (this.isImage_(file)) {
this.readImageFile_(file);
this.enableDisabledSections_();
} else {
this.reset_();
throw 'File is not an image : ' + file.type;
}
}
};
ns.ImportController.prototype.enableDisabledSections_ = function () {
this.resizeWidth.removeAttr('disabled');
this.resizeHeight.removeAttr('disabled');
this.smoothResize.removeAttr('disabled');
this.submitButton.removeAttr('disabled');
this.fileInputButton.removeClass('button-primary');
this.fileInputButton.blur();
$('.import-section-disabled').removeClass('import-section-disabled');
};
ns.ImportController.prototype.readImageFile_ = function (imageFile) {
pskl.utils.FileUtils.readFile(imageFile, this.processImageSource_.bind(this));
};
/**
* Create an image from the given source (url or data-url), and onload forward to onImageLoaded
* TODO : should be a generic utility method, should take a callback
* @param {String} imageSource url or data-url, will be used as src for the image
*/
ns.ImportController.prototype.processImageSource_ = function (imageSource) {
this.importedImage_ = new Image();
this.importedImage_.onload = this.onImageLoaded_.bind(this);
this.importedImage_.src = imageSource;
};
ns.ImportController.prototype.onImageLoaded_ = function (evt) {
var w = this.importedImage_.width,
h = this.importedImage_.height;
var filePath = this.hiddenFileInput.val();
var fileName = this.extractFileNameFromPath_(filePath);
this.fileInputStatus.html(fileName);
this.resizeWidth.val(w);
this.resizeHeight.val(h);
this.importPreview.width('auto');
this.importPreview.html('');
this.importPreview.append(this.createImagePreview_());
};
ns.ImportController.prototype.createImagePreview_ = function () {
var image = document.createElement('IMG');
image.src = this.importedImage_.src;
image.setAttribute('height', PREVIEW_HEIGHT);
return image;
};
ns.ImportController.prototype.extractFileNameFromPath_ = function (path) {
var parts = [];
if (path.indexOf('/') !== -1) {
parts = path.split('/');
} else if (path.indexOf('\\') !== -1) {
parts = path.split('\\');
} else {
parts = [path];
}
return parts[parts.length-1];
};
ns.ImportController.prototype.importImageToPiskel_ = function () {
if (this.importedImage_) {
if (window.confirm('You are about to create a new Piskel, unsaved changes will be lost.')) {
var w = this.resizeWidth.val(),
h = this.resizeHeight.val(),
smoothing = !!this.smoothResize.prop('checked');
var image = pskl.utils.ImageResizer.resize(this.importedImage_, w, h, smoothing);
var frame = pskl.utils.FrameUtils.createFromImage(image);
var layer = pskl.model.Layer.fromFrames('Layer 1', [frame]);
var piskel = pskl.model.Piskel.fromLayers([layer]);
pskl.app.piskelController.setPiskel(piskel);
pskl.app.animationController.setFPS(Constants.DEFAULT.FPS);
this.reset_();
}
}
};
ns.ImportController.prototype.isImage_ = function (file) {
return file.type.indexOf('image') === 0;
};
})();