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132 lines
3.7 KiB
132 lines
3.7 KiB
'use strict';
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exports.name = 'convertStyleToAttrs';
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exports.type = 'perItem';
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exports.active = false;
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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) + '$'),
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// Parentheses, E.g.: url(data:image/png;base64,iVBO...).
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// ':' and ';' inside of it should be threated as is. (Just like in strings.)
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rParenthesis =
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'\\(' + g('[^\'"()\\\\]+', rEscape, rSingleQuotes, rQuotes) + '*?' + '\\)',
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// The value. It can have strings and parentheses (see above). Fallbacks to anything in case of unexpected input.
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rValue =
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'\\s*(' +
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g(
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'[^!\'"();\\\\]+?',
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rEscape,
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rSingleQuotes,
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rQuotes,
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rParenthesis,
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'[^;]*?'
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) +
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'*?' +
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')',
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// End of declaration. Spaces outside of capturing groups help to do natural trimming.
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rDeclEnd = '\\s*(?:;\\s*|$)',
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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(
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rAttr + ':' + rValue + rImportant + rDeclEnd,
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'ig'
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),
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// Comments expression. Honors escape sequences and strings.
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regStripComments = new RegExp(
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g(rEscape, rSingleQuotes, rQuotes, '/\\*[^]*?\\*/'),
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'ig'
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);
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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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if (item.type === 'element' && item.attributes.style != null) {
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// ['opacity: 1', 'color: #000']
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let styles = [];
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const newAttributes = {};
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// Strip CSS comments preserving escape sequences and strings.
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const styleValue = item.attributes.style.replace(
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regStripComments,
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(match) => {
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return match[0] == '/'
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? ''
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: match[0] == '\\' && /[-g-z]/i.test(match[1])
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? match[1]
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: match;
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}
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);
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regDeclarationBlock.lastIndex = 0;
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// eslint-disable-next-line no-cond-assign
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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.includes(prop)) {
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newAttributes[prop] = val;
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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.attributes, newAttributes);
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if (styles.length) {
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item.attributes.style = styles
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.map((declaration) => declaration.join(':'))
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.join(';');
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} else {
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delete item.attributes.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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