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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 | 2x 2x 14x 14x 14x 1x 1x 1x 1x 1x 1x 1x | /**
* Extends Array with additional methods to esily keep
* track of all canvas in layout.
* @class
* @extends Array
*/
export class MemoryCanvaslist extends Array {
/**
* All given HTMLCanvasElements are included in {`MemoryCanvaslist`}
* Correction of width and height values are important.
* @param {Array} canvas list of canvas elements.
*/
addCanvas(canvas) {
const self = this;
canvas.forEach((c) => {
c.width = parseInt(c.offsetWidth);
c.height = parseInt(c.offsetHeight);
self.push(c);
});
}
/**
* Chooses randomly pair Canvas.
* @param {{}} srcCanvas Canvas element that needs to be paired.
* @return {{}} Paired elements.
*/
randomPair(srcCanvas) {
const srcIndex = this.indexOf(srcCanvas);
const result = [];
result.push(this.splice(srcIndex, 1)[0]);
const length = this.length;
const rnd = Math.floor(Math.random() * length);
result.push(this.splice(rnd, 1)[0]);
return result;
}
}
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