dom-helpers.ts

import { RenderCanvas } from "../elements/render-canvas/render-canvas";

export function clear() {

}

export function rect(x: number, y: number, width: number, height: number, color?: string): void {
    var renderCanvas = <RenderCanvas>document.getElementsByTagName("render-canvas")[0];
    renderCanvas.rect(x, y, width, height, color, false);
}

export function box(x: number, y: number, width: number, height: number, color?: string): void {
    var renderCanvas = <RenderCanvas>document.getElementsByTagName("render-canvas")[0];
    renderCanvas.rect(x, y, width, height, color, true);
}

export function getWidth(): number {
    var renderCanvas = <RenderCanvas>document.getElementsByTagName("render-canvas")[0];
    return renderCanvas.units.width;
}

export function getHeight(): number {
    var renderCanvas = <RenderCanvas>document.getElementsByTagName("render-canvas")[0];
    return renderCanvas.units.height;
}

export function getCenter(): number {
    var renderCanvas = <RenderCanvas>document.getElementsByTagName("render-canvas")[0];
    return renderCanvas.units.height / 2;
}

export function getRandom(min: number, max: number): number {
    return Math.floor(Math.random() * (max - min + 1) + min);
}

export function executeDrawQueue(): void {
    var renderCanvas = <RenderCanvas>document.getElementsByTagName("render-canvas")[0];
    renderCanvas.draw();
}

export function getRandomColor(): string {
    var prefersDarkScheme = window.matchMedia("(prefers-color-scheme: dark)");

    var from = prefersDarkScheme.matches ? 127 : 0;
    var to = prefersDarkScheme.matches ? 255 : 127;

    return "rgba(" + getRandom(from,to) + ", " + getRandom(from,to) + ", " + getRandom(from,to) + ", " + ("1") + ")";
}