showDebugDirtyRect.ts
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import type { ZRenderType } from '../zrender';
import type CanvasPainter from '../canvas/Painter';
import type BoundingRect from '../core/BoundingRect';
import { extend } from '../core/util';
class DebugRect {
dom: HTMLDivElement
private _hideTimeout: number
constructor(style: Opts['style']) {
const dom = this.dom = document.createElement('div');
dom.className = 'ec-debug-dirty-rect';
style = extend({}, style);
extend(style, {
backgroundColor: 'rgba(0, 0, 255, 0.2)',
border: '1px solid #00f'
});
dom.style.cssText = `
position: absolute;
opacity: 0;
transition: opacity 0.5s linear;
pointer-events: none;
`;
for (let key in style) {
if (style.hasOwnProperty(key)) {
(dom.style as any)[key] = (style as any)[key];
}
}
}
update(rect: BoundingRect) {
const domStyle = this.dom.style;
domStyle.width = rect.width + 'px';
domStyle.height = rect.height + 'px';
domStyle.left = rect.x + 'px';
domStyle.top = rect.y + 'px';
}
hide() {
this.dom.style.opacity = '0';
}
show(autoHideDelay?: number) {
clearTimeout(this._hideTimeout);
this.dom.style.opacity = '1';
// Auto hide after 2 second
this._hideTimeout = setTimeout(() => {
this.hide();
}, autoHideDelay || 1000) as unknown as number;
}
}
interface Opts {
style?: {
backgroundColor?: string
color?: string
}
autoHideDelay?: number
}
export default function showDebugDirtyRect(zr: ZRenderType, opts?: Opts) {
opts = opts || {};
const painter = zr.painter as CanvasPainter;
if (!painter.getLayers) {
throw new Error('Debug dirty rect can only been used on canvas renderer.');
}
if (painter.isSingleCanvas()) {
throw new Error('Debug dirty rect can only been used on zrender inited with container.');
}
const debugViewRoot = document.createElement('div');
debugViewRoot.style.cssText = `
position:absolute;
left:0;
top:0;
right:0;
bottom:0;
pointer-events:none;
`;
debugViewRoot.className = 'ec-debug-dirty-rect-container';
const debugRects: DebugRect[] = [];
const dom = zr.dom;
dom.appendChild(debugViewRoot);
const computedStyle = getComputedStyle(dom);
if (computedStyle.position === 'static') {
dom.style.position = 'relative';
}
zr.on('rendered', function () {
if (painter.getLayers) {
let idx = 0;
painter.eachBuiltinLayer((layer) => {
if (!layer.debugGetPaintRects) {
return;
}
const paintRects = layer.debugGetPaintRects();
for (let i = 0; i < paintRects.length; i++) {
if (!paintRects[i].width || !paintRects[i].height) {
continue;
}
if (!debugRects[idx]) {
debugRects[idx] = new DebugRect(opts.style);
debugViewRoot.appendChild(debugRects[idx].dom);
}
debugRects[idx].show(opts.autoHideDelay);
debugRects[idx].update(paintRects[i]);
idx++;
}
});
for (let i = idx; i < debugRects.length; i++) {
debugRects[i].hide();
}
}
});
}