683 lines
17 KiB
JavaScript
683 lines
17 KiB
JavaScript
/**
|
|
* This is a manager for the many canvas and content layers that compose the application
|
|
*
|
|
* It manages canvases and their locations and sizes according to current viewport views
|
|
*/
|
|
/**
|
|
* Here is where the old magic is created.
|
|
*
|
|
* This is probably not recommended, but it works and
|
|
* is probably the most reliable way to not break everything.
|
|
*/
|
|
(() => {
|
|
const original = {
|
|
drawImage: CanvasRenderingContext2D.prototype.drawImage,
|
|
getImageData: CanvasRenderingContext2D.prototype.getImageData,
|
|
putImageData: CanvasRenderingContext2D.prototype.putImageData,
|
|
|
|
// Drawing methods
|
|
moveTo: CanvasRenderingContext2D.prototype.moveTo,
|
|
lineTo: CanvasRenderingContext2D.prototype.lineTo,
|
|
|
|
arc: CanvasRenderingContext2D.prototype.arc,
|
|
fillRect: CanvasRenderingContext2D.prototype.fillRect,
|
|
clearRect: CanvasRenderingContext2D.prototype.clearRect,
|
|
};
|
|
|
|
// Backing up original functions to <key>Root
|
|
Object.keys(original).forEach((key) => {
|
|
CanvasRenderingContext2D.prototype[key + "Root"] = function (...args) {
|
|
return original[key].call(this, ...args);
|
|
};
|
|
});
|
|
|
|
// Add basic get bounding box support (canvas coordinates)
|
|
Reflect.defineProperty(CanvasRenderingContext2D.prototype, "bb", {
|
|
get: function () {
|
|
return new BoundingBox({
|
|
x: -this.origin.x,
|
|
y: -this.origin.y,
|
|
w: this.canvas.width,
|
|
h: this.canvas.height,
|
|
});
|
|
},
|
|
});
|
|
|
|
// Modifying drawImage
|
|
Reflect.defineProperty(CanvasRenderingContext2D.prototype, "drawImage", {
|
|
value: function (...args) {
|
|
switch (args.length) {
|
|
case 3:
|
|
case 5:
|
|
if (this.origin !== undefined) {
|
|
args[1] += this.origin.x;
|
|
args[2] += this.origin.y;
|
|
}
|
|
break;
|
|
case 9:
|
|
// Check for origin on source
|
|
const sctx = args[0].getContext && args[0].getContext("2d");
|
|
if (sctx && sctx.origin !== undefined) {
|
|
args[1] += sctx.origin.x;
|
|
args[2] += sctx.origin.y;
|
|
}
|
|
|
|
// Check for origin on destination
|
|
if (this.origin !== undefined) {
|
|
args[5] += this.origin.x;
|
|
args[6] += this.origin.y;
|
|
}
|
|
break;
|
|
}
|
|
// Pass arguments through
|
|
return original.drawImage.call(this, ...args);
|
|
},
|
|
});
|
|
|
|
// Modifying getImageData method
|
|
Reflect.defineProperty(CanvasRenderingContext2D.prototype, "getImageData", {
|
|
value: function (...args) {
|
|
if (this.origin) {
|
|
args[0] += this.origin.x;
|
|
args[1] += this.origin.y;
|
|
}
|
|
// Pass arguments through
|
|
return original.getImageData.call(this, ...args);
|
|
},
|
|
});
|
|
|
|
// Modifying putImageData method
|
|
Reflect.defineProperty(CanvasRenderingContext2D.prototype, "putImageData", {
|
|
value: function (...args) {
|
|
if (this.origin) {
|
|
args[0] += this.origin.x;
|
|
args[1] += this.origin.y;
|
|
}
|
|
// Pass arguments through
|
|
return original.putImageData.call(this, ...args);
|
|
},
|
|
});
|
|
|
|
// Modifying moveTo method
|
|
Reflect.defineProperty(CanvasRenderingContext2D.prototype, "moveTo", {
|
|
value: function (...args) {
|
|
if (this.origin) {
|
|
args[0] += this.origin.x;
|
|
args[1] += this.origin.y;
|
|
}
|
|
// Pass arguments through
|
|
return original.moveTo.call(this, ...args);
|
|
},
|
|
});
|
|
|
|
// Modifying lineTo method
|
|
Reflect.defineProperty(CanvasRenderingContext2D.prototype, "lineTo", {
|
|
value: function (...args) {
|
|
if (this.origin) {
|
|
args[0] += this.origin.x;
|
|
args[1] += this.origin.y;
|
|
}
|
|
// Pass arguments through
|
|
return original.lineTo.call(this, ...args);
|
|
},
|
|
});
|
|
|
|
// Modifying arc
|
|
Reflect.defineProperty(CanvasRenderingContext2D.prototype, "arc", {
|
|
value: function (...args) {
|
|
if (this.origin) {
|
|
args[0] += this.origin.x;
|
|
args[1] += this.origin.y;
|
|
}
|
|
// Pass arguments through
|
|
return original.arc.call(this, ...args);
|
|
},
|
|
});
|
|
|
|
// Modifying fillRect
|
|
Reflect.defineProperty(CanvasRenderingContext2D.prototype, "fillRect", {
|
|
value: function (...args) {
|
|
if (this.origin) {
|
|
args[0] += this.origin.x;
|
|
args[1] += this.origin.y;
|
|
}
|
|
// Pass arguments through
|
|
return original.fillRect.call(this, ...args);
|
|
},
|
|
});
|
|
// Modifying clearRect
|
|
Reflect.defineProperty(CanvasRenderingContext2D.prototype, "clearRect", {
|
|
value: function (...args) {
|
|
if (this.origin) {
|
|
args[0] += this.origin.x;
|
|
args[1] += this.origin.y;
|
|
}
|
|
// Pass arguments through
|
|
return original.clearRect.call(this, ...args);
|
|
},
|
|
});
|
|
})();
|
|
// End of black magic
|
|
|
|
const layers = {
|
|
_collections: [],
|
|
collections: makeWriteOnce({}, "layers.collections"),
|
|
|
|
listen: {
|
|
oncollectioncreate: new Observer(),
|
|
oncollectiondelete: new Observer(),
|
|
|
|
onlayercreate: new Observer(),
|
|
onlayerdelete: new Observer(),
|
|
},
|
|
|
|
// Registers a new collection
|
|
// Layer collections are a group of layers (canvases) that are rendered in tandem. (same width, height, position, transform, etc)
|
|
/**
|
|
*
|
|
* @param {string} key A key used to identify the collection
|
|
* @param {Size} size The initial size of the collection in pixels (CSS size)
|
|
* @param {object} options Extra options for the collection
|
|
* @param {string} [options.name=key] The display name of the collection
|
|
* @param {{key: string, options: object}} [options.initLayer] The configuration for the initial layer to be created
|
|
* @param {number} [options.inputSizeMultiplier=9] Size of the input area element, in pixels
|
|
* @param {HTMLElement} [options.targetElement] Element the collection will be inserted into
|
|
* @param {Size} [options.resolution=size] The resolution of the collection (canvas size). Not sure it works.
|
|
* @returns {LayerCollection} The newly created layer collection
|
|
*/
|
|
registerCollection: (key, size, options = {}) => {
|
|
defaultOpt(options, {
|
|
// Display name for the collection
|
|
name: key,
|
|
|
|
// Initial layer
|
|
initLayer: {
|
|
key: "default",
|
|
options: {},
|
|
},
|
|
|
|
// Input multiplier (Size of the input element div)
|
|
inputSizeMultiplier: 9,
|
|
|
|
// Target
|
|
targetElement: document.getElementById("layer-render"),
|
|
|
|
// Resolution of the image
|
|
resolution: size,
|
|
});
|
|
|
|
if (options.inputSizeMultiplier % 2 === 0) options.inputSizeMultiplier++;
|
|
|
|
// Path used for logging purposes
|
|
const _logpath = "layers.collections." + key;
|
|
|
|
// Collection ID
|
|
const id = guid();
|
|
|
|
// Collection element
|
|
const element = document.createElement("div");
|
|
element.id = `collection-${id}`;
|
|
element.style.width = `${size.w}px`;
|
|
element.style.height = `${size.h}px`;
|
|
element.classList.add("collection");
|
|
|
|
// Input element (overlay element for input handling)
|
|
const inputel = document.createElement("div");
|
|
inputel.id = `collection-input-${id}`;
|
|
inputel.classList.add("collection-input-overlay");
|
|
element.appendChild(inputel);
|
|
|
|
options.targetElement.appendChild(element);
|
|
|
|
/** @type {LayerCollection} */
|
|
const collection = makeWriteOnce(
|
|
{
|
|
id,
|
|
|
|
_logpath,
|
|
|
|
_layers: [],
|
|
layers: {},
|
|
|
|
key,
|
|
name: options.name,
|
|
element,
|
|
inputElement: inputel,
|
|
_inputOffset: null,
|
|
get inputOffset() {
|
|
return this._inputOffset;
|
|
},
|
|
|
|
_origin: {x: 0, y: 0},
|
|
get origin() {
|
|
return {...this._origin};
|
|
},
|
|
|
|
get bb() {
|
|
return new BoundingBox({
|
|
x: -this.origin.x,
|
|
y: -this.origin.y,
|
|
w: this.size.w,
|
|
h: this.size.h,
|
|
});
|
|
},
|
|
|
|
_resizeInputDiv() {
|
|
// Set offset
|
|
const oldOffset = {...this._inputOffset};
|
|
this._inputOffset = {
|
|
x:
|
|
-Math.floor(options.inputSizeMultiplier / 2) * size.w -
|
|
this._origin.x,
|
|
y:
|
|
-Math.floor(options.inputSizeMultiplier / 2) * size.h -
|
|
this._origin.y,
|
|
};
|
|
|
|
// Resize the input element
|
|
this.inputElement.style.left = `${this.inputOffset.x}px`;
|
|
this.inputElement.style.top = `${this.inputOffset.y}px`;
|
|
this.inputElement.style.width = `${
|
|
size.w * options.inputSizeMultiplier
|
|
}px`;
|
|
this.inputElement.style.height = `${
|
|
size.h * options.inputSizeMultiplier
|
|
}px`;
|
|
|
|
// Move elements inside to new offset
|
|
for (const child of this.inputElement.children) {
|
|
if (child.style.position === "absolute") {
|
|
child.style.left = `${
|
|
parseInt(child.style.left, 10) +
|
|
oldOffset.x -
|
|
this._inputOffset.x
|
|
}px`;
|
|
child.style.top = `${
|
|
parseInt(child.style.top, 10) +
|
|
oldOffset.y -
|
|
this._inputOffset.y
|
|
}px`;
|
|
}
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Expands the collection and its full layers by the specified amounts
|
|
*
|
|
* @param {number} left Pixels to expand left
|
|
* @param {number} top Pixels to expand top
|
|
* @param {number} right Pixels to expand right
|
|
* @param {number} bottom Pixels to expand bottom
|
|
*/
|
|
expand(left, top, right, bottom) {
|
|
this._layers.forEach((layer) => {
|
|
if (layer.full) layer._expand(left, top, right, bottom);
|
|
});
|
|
|
|
this._origin.x += left;
|
|
this._origin.y += top;
|
|
|
|
this.size.w += left + right;
|
|
this.size.h += top + bottom;
|
|
|
|
this._resizeInputDiv();
|
|
|
|
for (const layer of this._layers) {
|
|
layer.moveTo(layer.x, layer.y);
|
|
}
|
|
},
|
|
|
|
size,
|
|
resolution: options.resolution,
|
|
|
|
/**
|
|
* Registers a new layer
|
|
*
|
|
* @param {string | null} key Name and key to use to access layer. If null, it is a temporary layer.
|
|
* @param {object} options
|
|
* @param {string} options.id
|
|
* @param {string} options.name
|
|
* @param {?BoundingBox} options.bb
|
|
* @param {string} [options.category]
|
|
* @param {{w: number, h: number}} options.resolution
|
|
* @param {?string} options.group
|
|
* @param {object} options.after
|
|
* @param {object} options.ctxOptions
|
|
* @returns {Layer} The newly created layer
|
|
*/
|
|
registerLayer(key = null, options = {}) {
|
|
// Make ID
|
|
const id = options.id ?? guid();
|
|
|
|
defaultOpt(options, {
|
|
// ID of the layer
|
|
id: null,
|
|
|
|
// Display name for the layer
|
|
name: key || `Temporary ${id}`,
|
|
|
|
// Bounding box for layer
|
|
bb: {
|
|
x: -collection.origin.x,
|
|
y: -collection.origin.y,
|
|
w: collection.size.w,
|
|
h: collection.size.h,
|
|
},
|
|
|
|
// Category of the layer
|
|
category: null,
|
|
|
|
// Resolution for layer
|
|
resolution: null,
|
|
|
|
// Group for the layer ("group/subgroup/subsubgroup")
|
|
group: null,
|
|
|
|
// If set, will insert the layer after the given one
|
|
after: null,
|
|
|
|
// Context creation options
|
|
ctxOptions: {},
|
|
});
|
|
|
|
// Check if the layer is full
|
|
let full = false;
|
|
if (
|
|
options.bb.x === -collection.origin.x &&
|
|
options.bb.y === -collection.origin.y &&
|
|
options.bb.w === collection.size.w &&
|
|
options.bb.h === collection.size.h
|
|
)
|
|
full = true;
|
|
|
|
if (!options.resolution)
|
|
// Calculate resolution
|
|
options.resolution = {
|
|
w: Math.round(
|
|
(collection.resolution.w / collection.size.w) * options.bb.w
|
|
),
|
|
h: Math.round(
|
|
(collection.resolution.h / collection.size.h) * options.bb.h
|
|
),
|
|
};
|
|
|
|
// This layer's canvas
|
|
// This is where black magic will take place in the future
|
|
/**
|
|
* @todo Use the canvas black arts to auto-scale canvas
|
|
*/
|
|
const canvas = document.createElement("canvas");
|
|
canvas.id = `layer-${id}`;
|
|
|
|
canvas.style.left = `${options.bb.x}px`;
|
|
canvas.style.top = `${options.bb.y}px`;
|
|
canvas.style.width = `${options.bb.w}px`;
|
|
canvas.style.height = `${options.bb.h}px`;
|
|
canvas.width = options.resolution.w;
|
|
canvas.height = options.resolution.h;
|
|
|
|
if (!options.after) collection.element.appendChild(canvas);
|
|
else {
|
|
options.after.canvas.after(canvas);
|
|
}
|
|
|
|
/**
|
|
* Here we set the context origin for using the black magic.
|
|
*/
|
|
const ctx = canvas.getContext("2d", options.ctxOptions);
|
|
if (full) {
|
|
// Modify context to add origin information
|
|
ctx.origin = {
|
|
get x() {
|
|
return collection.origin.x;
|
|
},
|
|
get y() {
|
|
return collection.origin.y;
|
|
},
|
|
};
|
|
}
|
|
|
|
// Path used for logging purposes
|
|
const _layerlogpath = key
|
|
? _logpath + ".layers." + key
|
|
: _logpath + ".layers[" + id + "]";
|
|
const layer = makeWriteOnce(
|
|
{
|
|
_logpath: _layerlogpath,
|
|
_collection: collection,
|
|
|
|
_bb: new BoundingBox(options.bb),
|
|
get bb() {
|
|
return new BoundingBox(this._bb);
|
|
},
|
|
|
|
resolution: new Size(options.resolution),
|
|
id,
|
|
key,
|
|
name: options.name,
|
|
full,
|
|
category: options.category,
|
|
|
|
state: new Proxy(
|
|
{visible: true},
|
|
{
|
|
set(obj, opt, val) {
|
|
switch (opt) {
|
|
case "visible":
|
|
layer.canvas.style.display = val ? "block" : "none";
|
|
break;
|
|
}
|
|
obj[opt] = val;
|
|
},
|
|
}
|
|
),
|
|
|
|
get x() {
|
|
return this._bb.x;
|
|
},
|
|
|
|
get y() {
|
|
return this._bb.y;
|
|
},
|
|
|
|
get width() {
|
|
return this._bb.w;
|
|
},
|
|
|
|
get height() {
|
|
return this._bb.h;
|
|
},
|
|
|
|
get w() {
|
|
return this._bb.w;
|
|
},
|
|
|
|
get h() {
|
|
return this._bb.h;
|
|
},
|
|
|
|
get origin() {
|
|
return this._collection.origin;
|
|
},
|
|
|
|
get hidden() {
|
|
return !this.state.visible;
|
|
},
|
|
|
|
/** Our canvas */
|
|
canvas,
|
|
ctx,
|
|
|
|
/**
|
|
* This is called by the collection when the layer must be expanded.
|
|
*
|
|
* Should NOT be called directly
|
|
*
|
|
* @param {number} left Pixels to expand left
|
|
* @param {number} top Pixels to expand top
|
|
* @param {number} right Pixels to expand right
|
|
* @param {number} bottom Pixels to expand bottom
|
|
*/
|
|
_expand(left, top, right, bottom) {
|
|
const tmpCanvas = document.createElement("canvas");
|
|
tmpCanvas.width = this.w;
|
|
tmpCanvas.height = this.h;
|
|
tmpCanvas.getContext("2d").drawImage(this.canvas, 0, 0);
|
|
|
|
this.resize(this.w + left + right, this.h + top + bottom);
|
|
this.clear();
|
|
this.ctx.drawImageRoot(tmpCanvas, left, top);
|
|
|
|
this.moveTo(this.x - left, this.y - top);
|
|
},
|
|
|
|
/**
|
|
* Clears the layer contents
|
|
*/
|
|
clear() {
|
|
this.ctx.clearRectRoot(
|
|
0,
|
|
0,
|
|
this.canvas.width,
|
|
this.canvas.height
|
|
);
|
|
},
|
|
|
|
/**
|
|
* Recalculates DOM positioning
|
|
*/
|
|
syncDOM() {
|
|
this.moveTo(this.x, this.y);
|
|
this.resize(this.w, this.h);
|
|
},
|
|
|
|
/**
|
|
* Moves this layer to another level (after given layer)
|
|
*
|
|
* @param {Layer} layer Will move layer to after this one
|
|
*/
|
|
moveAfter(layer) {
|
|
layer.canvas.after(this.canvas);
|
|
},
|
|
|
|
/**
|
|
* Moves this layer to another level (before given layer)
|
|
*
|
|
* @param {Layer} layer Will move layer to before this one
|
|
*/
|
|
moveBefore(layer) {
|
|
layer.canvas.before(this.canvas);
|
|
},
|
|
|
|
/**
|
|
* Moves this layer to another location
|
|
*
|
|
* @param {number} x X coordinate of the top left of the canvas
|
|
* @param {number} y Y coordinate of the top left of the canvas
|
|
*/
|
|
moveTo(x, y) {
|
|
this._bb.x = x;
|
|
this._bb.y = y;
|
|
this.canvas.style.left = `${x}px`;
|
|
this.canvas.style.top = `${y}px`;
|
|
},
|
|
|
|
/**
|
|
* Resizes layer in place
|
|
*
|
|
* @param {number} w New width
|
|
* @param {number} h New height
|
|
*/
|
|
resize(w, h) {
|
|
canvas.width = Math.round(
|
|
options.resolution.w * (w / options.bb.w)
|
|
);
|
|
canvas.height = Math.round(
|
|
options.resolution.h * (h / options.bb.h)
|
|
);
|
|
this._bb.w = w;
|
|
this._bb.h = h;
|
|
canvas.style.width = `${w}px`;
|
|
canvas.style.height = `${h}px`;
|
|
},
|
|
|
|
// Hides this layer (don't draw)
|
|
hide() {
|
|
this.canvas.style.display = "none";
|
|
},
|
|
// Hides this layer (don't draw)
|
|
unhide() {
|
|
this.canvas.style.display = "block";
|
|
},
|
|
},
|
|
_layerlogpath
|
|
);
|
|
|
|
// Add to indexers
|
|
if (!options.after) collection._layers.push(layer);
|
|
else {
|
|
const index = collection._layers.findIndex(
|
|
(l) => l === options.after
|
|
);
|
|
collection._layers.splice(index, 0, layer);
|
|
}
|
|
if (key) collection.layers[key] = layer;
|
|
collection.layers[id] = layer;
|
|
|
|
if (key === null)
|
|
console.debug(
|
|
`[layers] Anonymous layer '${layer.name}' registered`
|
|
);
|
|
else
|
|
console.info(
|
|
`[layers] Layer '${layer.name}' at ${layer._logpath} registered`
|
|
);
|
|
|
|
layers.listen.onlayercreate.emit({
|
|
layer,
|
|
});
|
|
return layer;
|
|
},
|
|
|
|
/**
|
|
* Deletes a layer from the collection
|
|
*
|
|
* @param {Layer} layer Layer to delete
|
|
*/
|
|
deleteLayer: (layer) => {
|
|
const lobj = collection._layers.splice(
|
|
collection._layers.findIndex(
|
|
(l) => l.id === layer || l.id === layer.id
|
|
),
|
|
1
|
|
)[0];
|
|
if (!lobj) return;
|
|
|
|
layers.listen.onlayerdelete.emit({
|
|
layer: lobj,
|
|
});
|
|
if (lobj.key) collection.layers[lobj.key] = undefined;
|
|
collection.layers[lobj.id] = undefined;
|
|
|
|
collection.element.removeChild(lobj.canvas);
|
|
|
|
if (lobj.key) console.info(`[layers] Layer '${lobj.key}' deleted`);
|
|
else console.debug(`[layers] Anonymous layer '${lobj.id}' deleted`);
|
|
},
|
|
},
|
|
_logpath,
|
|
["_inputOffset"]
|
|
);
|
|
|
|
collection._resizeInputDiv();
|
|
|
|
layers._collections.push(collection);
|
|
layers.collections[key] = collection;
|
|
|
|
console.info(
|
|
`[layers] Collection '${options.name}' at ${_logpath} registered`
|
|
);
|
|
|
|
return collection;
|
|
},
|
|
};
|