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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 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 | 5x 4x 1x 5x 1x 5x 4x 4x 4x 1x 1x 1x 1x 1x 1x 1x 2x 2x 1x 1x 1x 1x 5x | import type { HighlightHelper } from '../types/HighlightHelper';
interface HighlightRegistry {}
interface CSSShim {
highlights: HighlightRegistry;
}
declare class Highlight {
constructor(...textRange: Range[]);
clear: () => void;
add: (range: Range) => void;
}
interface WindowWithHighlight extends Window {
Highlight: typeof Highlight;
CSS: CSSShim;
}
interface HighlightRegistryWithMap extends HighlightRegistry {
set(name: string, highlight: Highlight): void;
delete(name: string): void;
}
function isWindowWithHighlight(win: Window): win is WindowWithHighlight {
return (
typeof (win as WindowWithHighlight).Highlight === 'function' &&
typeof (win as WindowWithHighlight).CSS === 'object'
);
}
function isHighlightRegistryWithMap(
highlight: HighlightRegistry
): highlight is HighlightRegistryWithMap {
return typeof (highlight as HighlightRegistryWithMap).set === 'function';
}
class HighlightHelperImpl implements HighlightHelper {
private highlight: Highlight | undefined;
private highlights: HighlightRegistryWithMap | undefined;
constructor(private styleKey: string) {}
initialize(win: Window) {
if (isWindowWithHighlight(win) && isHighlightRegistryWithMap(win.CSS.highlights)) {
this.highlights = win.CSS.highlights;
this.highlight = new win.Highlight();
this.highlights.set(this.styleKey, this.highlight);
}
}
dispose() {
this.highlights?.delete(this.styleKey);
this.highlight?.clear();
this.highlight = undefined;
this.highlights = undefined;
}
addRanges(ranges: Range[]) {
Eif (this.highlight) {
for (const range of ranges) {
this.highlight.add(range);
}
}
}
clear() {
this.highlight?.clear();
}
}
/**
* @internal
* Create a HighlightHelper instance. A highlight helper manages the highlights in the editor
* @param win The window object
* @param styleKey The style key for the highlight
* @returns The created HighlightHelper instance or undefined if the window does not support highlights
*/
export function createHighlightHelper(styleKey: string): HighlightHelper {
return new HighlightHelperImpl(styleKey);
}
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