118 lines
3.9 KiB
JavaScript
118 lines
3.9 KiB
JavaScript
/* 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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var EXTEND = require('whet.extend'),
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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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// Final RegExp to parse CSS declarations.
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regDeclarationBlock = new RegExp(rAttr + ':' + rValue + 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) {
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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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styles.push([rule[1], rule[2]]);
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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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EXTEND(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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