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#921@trivial: Continues on implementation.
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packages/happy-dom/src/css/declaration/measurement-converter/CSSMeasurementConverter.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,75 @@ | ||
| import IWindow from '../../../window/IWindow'; | ||
|
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| /** | ||
| * CSS Measurement Converter. | ||
| */ | ||
| export default class CSSMeasurementConverter { | ||
| /** | ||
| * Returns measurement in pixels. | ||
| * | ||
| * @param options Options. | ||
| * @param options.ownerWindow Owner window. | ||
| * @param options.value Measurement (e.g. "10px", "10rem" or "10em"). | ||
| * @param options.rootFontSize Root font size in pixels. | ||
| * @param options.parentFontSize Parent font size in pixels. | ||
| * @returns Measurement in pixels. | ||
| */ | ||
| public static toPixels(options: { | ||
| ownerWindow: IWindow; | ||
| value: string; | ||
| rootFontSize: string | number; | ||
| parentFontSize: string | number; | ||
| }): number | null { | ||
| const value = parseFloat(options.value); | ||
| const unit = options.value.replace(value.toString(), ''); | ||
|
|
||
| if (isNaN(value)) { | ||
| return null; | ||
| } | ||
|
|
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| switch (unit) { | ||
| case 'px': | ||
| return value; | ||
| case 'rem': | ||
| return this.round(value * parseFloat(<string>options.rootFontSize)); | ||
| case 'em': | ||
| return this.round(value * parseFloat(<string>options.parentFontSize)); | ||
| case 'vw': | ||
| return this.round((value * options.ownerWindow.innerWidth) / 100); | ||
| case 'vh': | ||
| return this.round((value * options.ownerWindow.innerHeight) / 100); | ||
| case 'vmin': | ||
| return this.round( | ||
| (value * Math.min(options.ownerWindow.innerWidth, options.ownerWindow.innerHeight)) / 100 | ||
| ); | ||
| case 'vmax': | ||
| return ( | ||
| (value * Math.max(options.ownerWindow.innerWidth, options.ownerWindow.innerHeight)) / 100 | ||
| ); | ||
| case 'cm': | ||
| return this.round(value * 37.7812); | ||
| case 'mm': | ||
| return this.round(value * 3.7781); | ||
| case 'in': | ||
| return this.round(value * 96); | ||
| case 'pt': | ||
| return this.round(value * 1.3281); | ||
| case 'pc': | ||
| return this.round(value * 16); | ||
| case 'Q': | ||
| return this.round(value * 0.945); | ||
| default: | ||
| return null; | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * Rounds the number with 4 decimals. | ||
| * | ||
| * @param value Value. | ||
| * @returns Rounded value. | ||
| */ | ||
| public static round(value: number): number { | ||
| return Math.round(value * 10000) / 10000; | ||
| } | ||
| } |
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3 changes: 2 additions & 1 deletion
3
...ilities/CSSStyleDeclarationValueParser.ts → ...manager/CSSStyleDeclarationValueParser.ts
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