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125 lines
4.1 KiB
125 lines
4.1 KiB
/* jshint quotmark: false */ |
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'use strict'; |
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exports.type = 'perItem'; |
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exports.active = true; |
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exports.description = 'converts style to attributes'; |
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exports.params = { |
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keepImportant: false |
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}; |
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var stylingProps = require('./_collections').attrsGroups.presentation, |
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rEscape = '\\\\(?:[0-9a-f]{1,6}\\s?|\\r\\n|.)', // Like \" or \2051. Code points consume one space. |
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rAttr = '\\s*(' + g('[^:;\\\\]', rEscape) + '*?)\\s*', // attribute name like ‘fill’ |
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rSingleQuotes = "'(?:[^'\\n\\r\\\\]|" + rEscape + ")*?(?:'|$)", // string in single quotes: 'smth' |
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rQuotes = '"(?:[^"\\n\\r\\\\]|' + rEscape + ')*?(?:"|$)', // string in double quotes: "smth" |
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rQuotedString = new RegExp('^' + g(rSingleQuotes, rQuotes) + '$'), |
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// Parentheses, E.g.: url(data:image/png;base64,iVBO...). |
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// ':' and ';' inside of it should be threated as is. (Just like in strings.) |
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rParenthesis = '\\(' + g('[^\'"()\\\\]+', rEscape, rSingleQuotes, rQuotes) + '*?' + '\\)', |
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// The value. It can have strings and parentheses (see above). Fallbacks to anything in case of unexpected input. |
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rValue = '\\s*(' + g('[^!\'"();\\\\]+?', rEscape, rSingleQuotes, rQuotes, rParenthesis, '[^;]*?') + '*?' + ')', |
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// End of declaration. Spaces outside of capturing groups help to do natural trimming. |
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rDeclEnd = '\\s*(?:;\\s*|$)', |
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// Important rule |
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rImportant = '(\\s*!important(?![-(\w]))?', |
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// Final RegExp to parse CSS declarations. |
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regDeclarationBlock = new RegExp(rAttr + ':' + rValue + rImportant + rDeclEnd, 'ig'), |
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// Comments expression. Honors escape sequences and strings. |
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regStripComments = new RegExp(g(rEscape, rSingleQuotes, rQuotes, '/\\*[^]*?\\*/'), 'ig'); |
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/** |
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* Convert style in attributes. Cleanups comments and illegal declarations (without colon) as a side effect. |
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* |
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* @example |
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* <g style="fill:#000; color: #fff;"> |
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* ⬇ |
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* <g fill="#000" color="#fff"> |
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* |
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* @example |
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* <g style="fill:#000; color: #fff; -webkit-blah: blah"> |
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* ⬇ |
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* <g fill="#000" color="#fff" style="-webkit-blah: blah"> |
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* |
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* @param {Object} item current iteration item |
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* @return {Boolean} if false, item will be filtered out |
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* |
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* @author Kir Belevich |
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*/ |
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exports.fn = function(item, params) { |
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/* jshint boss: true */ |
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if (item.elem && item.hasAttr('style')) { |
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// ['opacity: 1', 'color: #000'] |
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var styleValue = item.attr('style').value, |
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styles = [], |
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attrs = {}; |
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// Strip CSS comments preserving escape sequences and strings. |
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styleValue = styleValue.replace(regStripComments, function(match) { |
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return match[0] == '/' ? '' : |
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match[0] == '\\' && /[-g-z]/i.test(match[1]) ? match[1] : match; |
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}); |
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regDeclarationBlock.lastIndex = 0; |
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for (var rule; rule = regDeclarationBlock.exec(styleValue);) { |
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if (!params.keepImportant || !rule[3]) { |
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styles.push([rule[1], rule[2]]); |
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} |
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} |
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if (styles.length) { |
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styles = styles.filter(function(style) { |
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if (style[0]) { |
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var prop = style[0].toLowerCase(), |
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val = style[1]; |
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if (rQuotedString.test(val)) { |
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val = val.slice(1, -1); |
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} |
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if (stylingProps.indexOf(prop) > -1) { |
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attrs[prop] = { |
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name: prop, |
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value: val, |
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local: prop, |
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prefix: '' |
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}; |
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return false; |
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} |
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} |
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return true; |
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}); |
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Object.assign(item.attrs, attrs); |
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if (styles.length) { |
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item.attr('style').value = styles |
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.map(function(declaration) { return declaration.join(':') }) |
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.join(';'); |
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} else { |
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item.removeAttr('style'); |
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} |
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} |
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} |
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}; |
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function g() { |
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return '(?:' + Array.prototype.join.call(arguments, '|') + ')'; |
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}
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