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Merge pull request #20 from nrkno/presentation-attributes-support
Presentation attributes support
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,121 @@ | ||
| /** | ||
| * @typedef {Object} MissingSvgPresentationAttributes | ||
| * @property {false} foundAttributes | ||
| */ | ||
|
|
||
| /** | ||
| * @typedef {Object} SvgPresentationAttributes | ||
| * @property {true} foundAttributes | ||
| * @property {string} svgAttrStr | ||
| * @property {string} svgAttrStrJsx | ||
| */ | ||
|
|
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| /** | ||
| * @typedef {Record<keyof typeof SVG_PRESENTATION_ATTRIBUTES, string | undefined>} PresentationAttributes | ||
| */ | ||
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|
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| /** | ||
| * Parses stringified svg-markup for presentation attributes and returns an object with relevant formats for use | ||
| * @param {string} markup Stringified svg markup | ||
| * @return {MissingSvgPresentationAttributes | SvgPresentationAttributes} | ||
| */ | ||
| export function parseSVGTagPresentationAttributes (markup) { | ||
| // Select tagName and all attributes as string from first matching tag | ||
| const tagParsingPattern = /<([a-z][a-z0-9]*)\s*([^>]*?)(\/?)>/ | ||
| const { 1: tagName, 2: attributes } = tagParsingPattern.exec(markup) | ||
| if (tagName !== 'svg') { | ||
| console.warn(`getSVGTagPresentationAttributes: Unable to find leading svg-tag, in markup: ${markup}`) | ||
| return { foundAttributes: false } | ||
| } | ||
| // Select key and value from all attributes found in tagParsingPattern - ignores valueless attributes like `hidden` | ||
| const attributeParsingPattern = /(?:^|\s)([a-z-A-Z]*)\s*=\s*((?:'[^']*')|(?:"[^"]*")|\S+)/gi | ||
| /** | ||
| * @type PresentationAttributes | ||
| */ | ||
| const attrs = {} | ||
|
|
||
| for (let match; (match = attributeParsingPattern.exec(attributes));) { | ||
| const { 1: key, 2: val } = match | ||
| const isQuoted = val && (val[0] === '\'' || val[0] === '"') | ||
| if (SVG_PRESENTATION_ATTRIBUTES.indexOf(key.toLowerCase()) > -1) { | ||
| attrs[key.toLowerCase()] = isQuoted ? val.slice(1, val.length - 1) : val | ||
| } | ||
| } | ||
| const foundAttributes = Object.keys(attrs).length > 0 | ||
| if (!foundAttributes) { | ||
| return { foundAttributes: false } | ||
| } | ||
| return { | ||
| foundAttributes: true, | ||
| svgAttrStr: Object.keys(attrs).reduce((content, key) => content + `${key}="${attrs[key]}" `, '').trim(), | ||
| svgAttrStrJsx: Object.keys(attrs).reduce((content, key) => content + `, ${key}: '${attrs[key]}'`, '').trim() | ||
| } | ||
| } | ||
|
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| // Attributes according to https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/Presentation | ||
| const SVG_PRESENTATION_ATTRIBUTES = [ | ||
| 'alignment-baseline', | ||
| 'baseline-shift', | ||
| 'clip-path', | ||
| 'clip-rule', | ||
| 'color', | ||
| 'color-interpolation', | ||
| 'color-interpolation-filters', | ||
| 'color-rendering', | ||
| 'cursor', | ||
| 'd', | ||
| 'direction', | ||
| 'display', | ||
| 'dominant-baseline', | ||
| 'fill', | ||
| 'fill-opacity', | ||
| 'fill-rule', | ||
| 'filter', | ||
| 'flood-color', | ||
| 'flood-opacity', | ||
| 'font-family', | ||
| 'font-size', | ||
| 'font-size-adjust', | ||
| 'font-stretch', | ||
| 'font-style', | ||
| 'font-variant', | ||
| 'font-weight', | ||
| 'image-rendering', | ||
| 'letter-spacing', | ||
| 'lighting-color', | ||
| 'marker-end', | ||
| 'marker-mid', | ||
| 'marker-start', | ||
| 'mask', | ||
| 'opacity', | ||
| 'overflow', | ||
| 'pointer-events', | ||
| 'shape-rendering', | ||
| 'solid-color', | ||
| 'solid-opacity', | ||
| 'stop-color', | ||
| 'stop-opacity', | ||
| 'stroke', | ||
| 'stroke-dasharray', | ||
| 'stroke-dashoffset', | ||
| 'stroke-linecap', | ||
| 'stroke-linejoin', | ||
| 'stroke-miterlimit', | ||
| 'stroke-opacity', | ||
| 'stroke-width', | ||
| 'text-anchor', | ||
| 'text-decoration', | ||
| 'text-rendering', | ||
| 'transform', | ||
| 'unicode-bidi', | ||
| 'vector-effect', | ||
| 'visibility', | ||
| 'word-spacing', | ||
| 'writing-mode' | ||
| // 'clip', Deprecated | ||
| // 'color-profile', Deprecated | ||
| // 'enable-background', Deprecated | ||
| // 'glyph-orientation-horizontal', Deprecated | ||
| // 'glyph-orientation-vertical', Deprecated | ||
| // 'kerning', Deprecated | ||
| ] |
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