aaac7fed
 liuqimichale
add
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/* jshint quotmark: false */
'use strict';
exports.type = 'perItem';
exports.active = true;
exports.description = 'converts style to attributes';
var EXTEND = require('whet.extend'),
stylingProps = require('./_collections').attrsGroups.presentation,
rEscape = '\\\\(?:[0-9a-f]{1,6}\\s?|\\r\\n|.)', // Like \" or \2051. Code points consume one space.
rAttr = '\\s*(' + g('[^:;\\\\]', rEscape) + '*?)\\s*', // attribute name like ‘fill’
rSingleQuotes = "'(?:[^'\\n\\r\\\\]|" + rEscape + ")*?(?:'|$)", // string in single quotes: 'smth'
rQuotes = '"(?:[^"\\n\\r\\\\]|' + rEscape + ')*?(?:"|$)', // string in double quotes: "smth"
rQuotedString = new RegExp('^' + g(rSingleQuotes, rQuotes) + '$'),
// Parentheses, E.g.: url(data:image/png;base64,iVBO...).
// ':' and ';' inside of it should be threated as is. (Just like in strings.)
rParenthesis = '\\(' + g('[^\'"()\\\\]+', rEscape, rSingleQuotes, rQuotes) + '*?' + '\\)',
// The value. It can have strings and parentheses (see above). Fallbacks to anything in case of unexpected input.
rValue = '\\s*(' + g('[^\'"();\\\\]+?', rEscape, rSingleQuotes, rQuotes, rParenthesis, '[^;]*?') + '*?' + ')',
// End of declaration. Spaces outside of capturing groups help to do natural trimming.
rDeclEnd = '\\s*(?:;\\s*|$)',
// Final RegExp to parse CSS declarations.
regDeclarationBlock = new RegExp(rAttr + ':' + rValue + rDeclEnd, 'ig'),
// Comments expression. Honors escape sequences and strings.
regStripComments = new RegExp(g(rEscape, rSingleQuotes, rQuotes, '/\\*[^]*?\\*/'), 'ig');
/**
* Convert style in attributes. Cleanups comments and illegal declarations (without colon) as a side effect.
*
* @example
* <g style="fill:#000; color: #fff;">
* ⬇
* <g fill="#000" color="#fff">
*
* @example
* <g style="fill:#000; color: #fff; -webkit-blah: blah">
* ⬇
* <g fill="#000" color="#fff" style="-webkit-blah: blah">
*
* @param {Object} item current iteration item
* @return {Boolean} if false, item will be filtered out
*
* @author Kir Belevich
*/
exports.fn = function(item) {
/* jshint boss: true */
if (item.elem && item.hasAttr('style')) {
// ['opacity: 1', 'color: #000']
var styleValue = item.attr('style').value,
styles = [],
attrs = {};
// Strip CSS comments preserving escape sequences and strings.
styleValue = styleValue.replace(regStripComments, function(match) {
return match[0] == '/' ? '' :
match[0] == '\\' && /[-g-z]/i.test(match[1]) ? match[1] : match;
});
regDeclarationBlock.lastIndex = 0;
for (var rule; rule = regDeclarationBlock.exec(styleValue);) {
styles.push([rule[1], rule[2]]);
}
if (styles.length) {
styles = styles.filter(function(style) {
if (style[0]) {
var prop = style[0].toLowerCase(),
val = style[1];
if (rQuotedString.test(val)) {
val = val.slice(1, -1);
}
if (stylingProps.indexOf(prop) > -1) {
attrs[prop] = {
name: prop,
value: val,
local: prop,
prefix: ''
};
return false;
}
}
return true;
});
EXTEND(item.attrs, attrs);
if (styles.length) {
item.attr('style').value = styles
.map(function(declaration) { return declaration.join(':') })
.join(';');
} else {
item.removeAttr('style');
}
}
}
};
function g() {
return '(?:' + Array.prototype.join.call(arguments, '|') + ')';
}
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