mirror of
https://github.com/lospec/pixel-editor.git
synced 2023-08-10 21:12:51 +03:00
320 lines
11 KiB
JavaScript
320 lines
11 KiB
JavaScript
// TODO: add undo for layer drag n drop
|
|
|
|
/** Handler class for a single canvas (a single layer)
|
|
*
|
|
* @param width Canvas width
|
|
* @param height Canvas height
|
|
* @param canvas HTML canvas element or the ID of the canvas related to the layer
|
|
*/
|
|
class Layer {
|
|
static layerCount = 1;
|
|
static maxZIndex = 3;
|
|
|
|
static unusedIDs = [];
|
|
static currentID = 1;
|
|
|
|
static layerOptions = document.getElementById("layer-properties-menu");
|
|
|
|
// TODO: this is simply terrible. menuEntry can either be an HTML element, a string or undefined.
|
|
// If it's an HTML element it is added, if it's a string nothing happens, if it's undefined the
|
|
// first menuEntry is used (the one that appears on load)
|
|
constructor(width, height, canvas, menuEntry) {
|
|
// REFACTOR: the canvas should actually be a Canvas instance
|
|
this.canvas = Util.getElement(canvas);
|
|
this.canvas.width = width;
|
|
this.canvas.height = height;
|
|
// REFACTOR: the context could be an attribute of the canvas class, but it's a bit easier
|
|
// to just type layer.context, we should discuss this
|
|
this.context = this.canvas.getContext('2d');
|
|
this.isSelected = false;
|
|
this.isVisible = true;
|
|
this.isLocked = false;
|
|
|
|
this.oldLayerName = null;
|
|
|
|
if (typeof menuEntry == "string")
|
|
this.menuEntry = document.getElementById("layers-menu").firstElementChild;
|
|
else if (menuEntry !== undefined)
|
|
this.menuEntry = menuEntry;
|
|
|
|
let id = Layer.unusedIDs.pop();
|
|
|
|
if (id == null) {
|
|
id = Layer.currentID;
|
|
Layer.currentID++;
|
|
}
|
|
|
|
this.id = "layer" + id;
|
|
|
|
// Binding the events
|
|
if (this.menuEntry !== undefined) {
|
|
this.name = this.menuEntry.getElementsByTagName("p")[0].innerHTML;
|
|
this.menuEntry.id = "layer" + id;
|
|
|
|
this.menuEntry.onmouseover = () => this.hover();
|
|
this.menuEntry.onmouseout = () => this.unhover();
|
|
this.menuEntry.onclick = () => this.selectLayer();
|
|
this.menuEntry.getElementsByTagName("button")[0].onclick = () => this.toggleLock();
|
|
this.menuEntry.getElementsByTagName("button")[1].onclick = () => this.toggleVisibility();
|
|
|
|
this.menuEntry.addEventListener("mouseup", this.openOptionsMenu, false);
|
|
this.menuEntry.addEventListener("dragstart", this.layerDragStart, false);
|
|
this.menuEntry.addEventListener("drop", this.layerDragDrop, false);
|
|
this.menuEntry.addEventListener("dragover", this.layerDragOver, false);
|
|
this.menuEntry.addEventListener("dragleave", this.layerDragLeave, false);
|
|
this.menuEntry.addEventListener("dragend", this.layerDragEnd, false);
|
|
|
|
Events.onCustom("del", this.tryDelete.bind(this));
|
|
|
|
this.menuEntry.getElementsByTagName("canvas")[0].getContext('2d').imageSmoothingEnabled = false;
|
|
}
|
|
|
|
this.initialize();
|
|
}
|
|
|
|
hasCanvas() {
|
|
return this.menuEntry != null;
|
|
}
|
|
|
|
tryDelete() {
|
|
if (Input.getLastTarget() != this.menuEntry && Input.getLastTarget().parentElement != this.menuEntry)
|
|
return;
|
|
LayerList.deleteLayer();
|
|
}
|
|
|
|
// Initializes the canvas
|
|
initialize() {
|
|
//resize canvas
|
|
this.canvas.style.width = (this.canvas.width*currFile.zoom)+'px';
|
|
this.canvas.style.height = (this.canvas.height*currFile.zoom)+'px';
|
|
|
|
//show canvas
|
|
this.canvas.style.display = 'block';
|
|
|
|
//center canvas in window
|
|
this.canvas.style.left = 64+currFile.canvasView.clientWidth/2-(currFile.canvasSize[0]*currFile.zoom/2)+'px';
|
|
this.canvas.style.top = 48+currFile.canvasView.clientHeight/2-(currFile.canvasSize[1]*currFile.zoom/2)+'px';
|
|
|
|
this.context.imageSmoothingEnabled = false;
|
|
this.context.mozImageSmoothingEnabled = false;
|
|
}
|
|
|
|
rename() {
|
|
this.menuEntry.getElementsByTagName("p")[0].setAttribute("contenteditable", false);
|
|
|
|
if (this.oldLayerName != null) {
|
|
let name = this.menuEntry.getElementsByTagName("p")[0].innerHTML;
|
|
|
|
for (let i=0; i<currFile.layers.length; i++) {
|
|
if (name === currFile.layers[i].name) {
|
|
name += ' (1)';
|
|
i = 0;
|
|
}
|
|
}
|
|
this.name = name;
|
|
this.menuEntry.getElementsByTagName("p")[0].innerHTML = name;
|
|
|
|
new HistoryState().RenameLayer(this.oldLayerName, name, currFile.currentLayer);
|
|
this.oldLayerName = null;
|
|
}
|
|
}
|
|
|
|
hover() {
|
|
// Hides all the layers but the current one
|
|
for (let i=1; i<currFile.layers.length - nAppLayers; i++) {
|
|
if (currFile.layers[i] !== this) {
|
|
currFile.layers[i].canvas.style.opacity = 0.3;
|
|
}
|
|
}
|
|
}
|
|
|
|
unhover() {
|
|
// Shows all the layers again
|
|
for (let i=1; i<currFile.layers.length - nAppLayers; i++) {
|
|
if (currFile.layers[i] !== this) {
|
|
currFile.layers[i].canvas.style.opacity = 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
setID(id) {
|
|
this.id = id;
|
|
if (this.menuEntry != null) {
|
|
this.menuEntry.id = id;
|
|
}
|
|
}
|
|
|
|
// Resizes canvas
|
|
resize() {
|
|
let newWidth = (this.canvas.width * currFile.zoom) + 'px';
|
|
let newHeight = (this.canvas.height *currFile.zoom)+ 'px';
|
|
|
|
this.canvas.style.width = newWidth;
|
|
this.canvas.style.height = newHeight;
|
|
}
|
|
|
|
setCanvasOffset (offsetLeft, offsetTop) {
|
|
//horizontal offset
|
|
var minXOffset = -currFile.canvasSize[0] * currFile.zoom;
|
|
var maxXOffset = window.innerWidth - 300;
|
|
|
|
if (offsetLeft < minXOffset)
|
|
this.canvas.style.left = minXOffset +'px';
|
|
else if (offsetLeft > maxXOffset)
|
|
this.canvas.style.left = maxXOffset +'px';
|
|
else
|
|
this.canvas.style.left = offsetLeft +'px';
|
|
|
|
//vertical offset
|
|
var minYOffset = -currFile.canvasSize[1] * currFile.zoom + 164;
|
|
var maxYOffset = window.innerHeight - 100;
|
|
|
|
if (offsetTop < minYOffset)
|
|
this.canvas.style.top = minYOffset +'px';
|
|
else if (offsetTop > maxYOffset)
|
|
this.canvas.style.top = maxYOffset +'px';
|
|
else
|
|
this.canvas.style.top = offsetTop +'px';
|
|
}
|
|
|
|
// Copies the otherLayer's position and size
|
|
copyData(otherLayer) {
|
|
this.canvas.style.width = otherLayer.canvas.style.width;
|
|
this.canvas.style.height = otherLayer.canvas.style.height;
|
|
|
|
this.canvas.style.left = otherLayer.canvas.style.left;
|
|
this.canvas.style.top = otherLayer.canvas.style.top;
|
|
}
|
|
|
|
selectLayer(hideOptions = true) {
|
|
if (hideOptions)
|
|
LayerList.closeOptionsMenu();
|
|
// Deselecting the old layer
|
|
currFile.currentLayer.deselectLayer();
|
|
|
|
// Selecting the current layer
|
|
this.isSelected = true;
|
|
this.menuEntry.classList.add("selected-layer");
|
|
currFile.currentLayer = this;
|
|
}
|
|
|
|
toggleLock() {
|
|
if (this.isLocked) {
|
|
this.unlock();
|
|
}
|
|
else {
|
|
this.lock();
|
|
}
|
|
}
|
|
|
|
toggleVisibility() {
|
|
if (this.isVisible) {
|
|
this.hide();
|
|
}
|
|
else {
|
|
this.show();
|
|
}
|
|
}
|
|
|
|
deselectLayer() {
|
|
this.isSelected = false;
|
|
this.menuEntry.classList.remove("selected-layer");
|
|
}
|
|
|
|
lock() {
|
|
this.isLocked = true;
|
|
this.menuEntry.getElementsByClassName("layer-button")[0].style.visibility = "visible";
|
|
|
|
this.menuEntry.getElementsByClassName("default-icon")[0].style.display = "none";
|
|
this.menuEntry.getElementsByClassName("edited-icon")[0].style.display = "inline-block";
|
|
}
|
|
|
|
unlock() {
|
|
this.isLocked = false;
|
|
this.menuEntry.getElementsByClassName("layer-button")[0].style.visibility = "hidden";
|
|
|
|
this.menuEntry.getElementsByClassName("default-icon")[0].style.display = "inline-block";
|
|
this.menuEntry.getElementsByClassName("edited-icon")[0].style.display = "none";
|
|
}
|
|
|
|
show() {
|
|
this.isVisible = true;
|
|
this.canvas.style.visibility = "visible";
|
|
this.menuEntry.getElementsByClassName("layer-button")[1].style.visibility = "hidden";
|
|
|
|
// Changing icon
|
|
this.menuEntry.getElementsByClassName("default-icon")[1].style.display = "inline-block";
|
|
this.menuEntry.getElementsByClassName("edited-icon")[1].style.display = "none";
|
|
}
|
|
|
|
hide() {
|
|
this.isVisible = false;
|
|
this.canvas.style.visibility = "hidden";
|
|
this.menuEntry.getElementsByClassName("layer-button")[1].style.visibility = "visible";
|
|
|
|
// Changing icon
|
|
this.menuEntry.getElementsByClassName("default-icon")[1].style.display = "none";
|
|
this.menuEntry.getElementsByClassName("edited-icon")[1].style.display = "inline-block";
|
|
}
|
|
|
|
updateLayerPreview() {
|
|
// Getting the canvas
|
|
let destination = this.menuEntry.getElementsByTagName("canvas")[0];
|
|
let widthRatio = currFile.canvasSize[0] / currFile.canvasSize[1];
|
|
let heightRatio = currFile.canvasSize[1] / currFile.canvasSize[0];
|
|
|
|
// Computing width and height for the preview image
|
|
let previewWidth = destination.width;
|
|
let previewHeight = destination.height;
|
|
|
|
// If the sprite is rectangular, I apply the ratio to the preview as well
|
|
if (widthRatio < 1) {
|
|
previewWidth = destination.width * widthRatio;
|
|
}
|
|
else if (widthRatio > 1) {
|
|
previewHeight = destination.height * heightRatio;
|
|
}
|
|
|
|
// La appiccico sulla preview
|
|
destination.getContext('2d').clearRect(0, 0, destination.width, destination.height);
|
|
destination.getContext('2d').drawImage(this.canvas,
|
|
// This is necessary to center the preview in the canvas
|
|
(destination.width - previewWidth) / 2, (destination.height - previewHeight) / 2,
|
|
previewWidth, previewHeight);
|
|
}
|
|
|
|
drawLine(x0,y0,x1,y1, brushSize, clear=false) {
|
|
var dx = Math.abs(x1-x0);
|
|
var dy = Math.abs(y1-y0);
|
|
var sx = (x0 < x1 ? 1 : -1);
|
|
var sy = (y0 < y1 ? 1 : -1);
|
|
var err = dx-dy;
|
|
|
|
while (true) {
|
|
//set pixel
|
|
// If the current tool is the brush
|
|
// REFACTOR: this is terrible
|
|
if (!clear) {
|
|
// I fill the rect
|
|
this.context.fillRect(x0-Math.floor(brushSize/2), y0-Math.floor(brushSize/2), brushSize, brushSize);
|
|
} else {
|
|
// In case I'm using the eraser I must clear the rect
|
|
this.context.clearRect(x0-Math.floor(brushSize/2), y0-Math.floor(brushSize/2), brushSize, brushSize);
|
|
}
|
|
|
|
//if we've reached the end goal, exit the loop
|
|
if ((x0==x1) && (y0==y1)) break;
|
|
var e2 = 2*err;
|
|
|
|
if (e2 >-dy) {
|
|
err -=dy;
|
|
x0+=sx;
|
|
}
|
|
|
|
if (e2 < dx) {
|
|
err +=dx;
|
|
y0+=sy;
|
|
}
|
|
}
|
|
}
|
|
} |