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Use guard function for mix-blend-mode parsing

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rain2o 2022-10-26 17:35:56 +01:00
parent 7f56e55775
commit 01ccdc35e9
1 changed files with 42 additions and 64 deletions
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106
src/css/property-descriptors/mix-blend-mode.ts
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@ -1,77 +1,55 @@
import {IPropertyIdentValueDescriptor, PropertyDescriptorParsingType} from '../IPropertyDescriptor';
import {Context} from '../../core/context';
export const enum MIX_BLEND_MODE {
NORMAL = 'normal',
MULTIPLY = 'multiply',
SCREEN = 'screen',
OVERLAY = 'overlay',
DARKEN = 'darken',
LIGHTEN = 'lighten',
COLOR_DODGE = 'color-dodge',
COLOR_BURN = 'color-burn',
HARD_LIGHT = 'hard-light',
SOFT_LIGHT = 'soft-light',
DIFFERENCE = 'difference',
EXCLUSION = 'exclusion',
HUE = 'hue',
SATURATION = 'saturation',
COLOR = 'color',
LUMINOSITY = 'luminosity',
INITIAL = 'initial',
INHERIT = 'inherit',
REVERT = 'revert',
UNSET = 'unset'
/**
* Guard function for checking validity of mode and casting as
* GlobalCompositeOperation if it's a valid value
*
* @param mode String value of the css mix-blend-mode
* @returns boolean
*/
function isGlobalCompositeOperation(mode: string): mode is GlobalCompositeOperation {
const globalCompositeModes = [
'color',
'color-burn',
'color-dodge',
'copy',
'darken',
'destination-atop',
'destination-in',
'destination-out',
'destination-over',
'difference',
'exclusion',
'hard-light',
'hue',
'lighten',
'lighter',
'luminosity',
'multiply',
'overlay',
'saturation',
'screen',
'soft-light',
'source-atop',
'source-in',
'source-out',
'source-over',
'xor'
];
return globalCompositeModes.indexOf(mode) !== -1;
}
export const mixBlendMode: IPropertyIdentValueDescriptor<MIX_BLEND_MODE> = {
export const mixBlendMode: IPropertyIdentValueDescriptor<GlobalCompositeOperation> = {
name: 'mix-blend-mode',
initialValue: 'normal',
prefix: false,
type: PropertyDescriptorParsingType.IDENT_VALUE,
parse: (_context: Context, mode: string) => {
switch (mode) {
case 'multiply':
return MIX_BLEND_MODE.MULTIPLY;
case 'screen':
return MIX_BLEND_MODE.SCREEN;
case 'overlay':
return MIX_BLEND_MODE.OVERLAY;
case 'darken':
return MIX_BLEND_MODE.DARKEN;
case 'lighten':
return MIX_BLEND_MODE.LIGHTEN;
case 'color-dodge':
return MIX_BLEND_MODE.COLOR_DODGE;
case 'color-burn':
return MIX_BLEND_MODE.COLOR_BURN;
case 'hard-light':
return MIX_BLEND_MODE.HARD_LIGHT;
case 'soft-light':
return MIX_BLEND_MODE.SOFT_LIGHT;
case 'difference':
return MIX_BLEND_MODE.DIFFERENCE;
case 'exclusion':
return MIX_BLEND_MODE.EXCLUSION;
case 'hue':
return MIX_BLEND_MODE.HUE;
case 'saturation':
return MIX_BLEND_MODE.SATURATION;
case 'color':
return MIX_BLEND_MODE.COLOR;
case 'luminosity':
return MIX_BLEND_MODE.LUMINOSITY;
case 'initial':
return MIX_BLEND_MODE.INITIAL;
case 'inherit':
return MIX_BLEND_MODE.INHERIT;
case 'revert':
return MIX_BLEND_MODE.REVERT;
case 'unset':
return MIX_BLEND_MODE.UNSET;
case 'normal':
default:
return MIX_BLEND_MODE.NORMAL;
if (isGlobalCompositeOperation(mode)) {
return mode;
}
// This is the default in css
return 'source-over';
}
};