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Add support for colored box shadows (#5979)
* WIP * add box shadow parser * use box shadow parser * Update default shadows, add boxShadowColor key, add shadow datatype * Update tests * add `valid` flag to `boxShadow` parser Co-authored-by: Robin Malfait <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,71 @@ | ||
| let KEYWORDS = new Set(['inset', 'inherit', 'initial', 'revert', 'unset']) | ||
| let COMMA = /\,(?![^(]*\))/g // Comma separator that is not located between brackets. E.g.: `cubiz-bezier(a, b, c)` these don't count. | ||
| let SPACE = /\ +(?![^(]*\))/g // Similar to the one above, but with spaces instead. | ||
| let LENGTH = /^-?(\d+)(.*?)$/g | ||
|
|
||
| export function parseBoxShadowValue(input) { | ||
| let shadows = input.split(COMMA) | ||
| return shadows.map((shadow) => { | ||
| let value = shadow.trim() | ||
| let result = { raw: value } | ||
| let parts = value.split(SPACE) | ||
| let seen = new Set() | ||
|
|
||
| for (let part of parts) { | ||
| // Reset index, since the regex is stateful. | ||
| LENGTH.lastIndex = 0 | ||
|
|
||
| // Keyword | ||
| if (!seen.has('KEYWORD') && KEYWORDS.has(part)) { | ||
| result.keyword = part | ||
| seen.add('KEYWORD') | ||
| } | ||
|
|
||
| // Length value | ||
| else if (LENGTH.test(part)) { | ||
| if (!seen.has('X')) { | ||
| result.x = part | ||
| seen.add('X') | ||
| } else if (!seen.has('Y')) { | ||
| result.y = part | ||
| seen.add('Y') | ||
| } else if (!seen.has('BLUR')) { | ||
| result.blur = part | ||
| seen.add('BLUR') | ||
| } else if (!seen.has('SPREAD')) { | ||
| result.spread = part | ||
| seen.add('SPREAD') | ||
| } | ||
| } | ||
|
|
||
| // Color or unknown | ||
| else { | ||
| if (!result.color) { | ||
| result.color = part | ||
| } else { | ||
| if (!result.unknown) result.unknown = [] | ||
| result.unknown.push(part) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| // Check if valid | ||
| result.valid = result.x !== undefined && result.y !== undefined | ||
|
|
||
| return result | ||
| }) | ||
| } | ||
|
|
||
| export function formatBoxShadowValue(shadows) { | ||
| return shadows | ||
| .map((shadow) => { | ||
| if (!shadow.valid) { | ||
| return shadow.raw | ||
| } | ||
|
|
||
| return [shadow.keyword, shadow.x, shadow.y, shadow.blur, shadow.spread, shadow.color] | ||
| .filter(Boolean) | ||
| .join(' ') | ||
| }) | ||
| .join(', ') | ||
| } |
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