mr-crocs-adventures/js/geometry/GeometryRectCollection.js

export default class GeometryRectCollection
{
    constructor()
    {
        this.rects = [];
    }

    isContainingRect(rect)
    {
        for (let r = 0; r < this.rects.length; r++) {
            if (rect.isEqual(this.rects[r])) {
                return true;
            }
        }

        return false;
    }

    getUniqueWidth()
    {
        if (this.getLength() === 0) {
            return null;
        } else if (this.getLength() === 1) {
            return this.rects[0];
        }

        let widths = [this.rects[0].width];

        for (let r = 0; r < this.getLength(); r++) {
            if (widths.indexOf(this.rects[r].width) !== -1) {
                return this.rects[r];
            }

            widths.push(rect.width);
        }

        return null;
    }

    getUniqueHeight()
    {
        if (this.getLength() === 0) {
            return null;
        } else if (this.getLength() === 1) {
            return this.rects[0].height;
        }

        let heights = [this.rects[0].height];

        for (let r = 0; r < this.getLength(); r++) {
            if (heights.indexOf(rect.height) !== -1) {
                return rect.height;
            }

            heights.push(rect.height);
        }

        return null;
    }

    addRect(rect)
    {
        if (!this.isContainingRect(rect)) {
            this.rects.push(rect);
        }
    }

    getLength()
    {
        return this.rects.length;
    }

    getEqualWidths()
    {
        if (this.getLength() === 0) {
            return null;
        }

        let width = this.rects[0].width;

        for (let r = 1; r < this.getLength(); r++) {
            if (this.rects[r].width === width) {
                return false;
            }
        }

        return true;
    }

    hasEqualWidths()
    {
        if (this.getLength() === 0) {
            return false;
        }

        let width = this.rects[0].width;

        for (let r = 1; r < this.getLength(); r++) {
            if (this.rects[r].width !== width) {
                return false;
            }
        }

        return true;
    }

    hasEqualHeights()
    {
        if (this.getLength() === 0) {
            return false;
        }

        let height = this.rects[0].height;

        for (let r = 1; r < this.getLength(); r++) {
            if (this.rects[r].height !== height) {
                return false;
            }
        }

        return true;
    }

    forEach(callback)
    {
        this.rects.forEach(callback);
    }

    getRect(index)
    {
        return this.rects[index];
    }
}