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| 'use strict';
/**
* Module dependencies.
*/
var cssom = require('cssom');
var cheerio = require('cheerio');
var own = {}.hasOwnProperty;
var os = require('os');
var deprecate = require('util-deprecate');
var Selector = require('./selector');
var Property = require('./property');
exports.Selector = Selector;
exports.Property = Property;
exports.styleSelector = new Selector('<style attribute>');
/**
* Returns an array of the selectors.
*
* @license Sizzle CSS Selector Engine - MIT
* @param {String} selectorText from cssom
* @api public
*/
exports.extract = function extract(selectorText) {
var attr = 0;
var sels = [];
var sel = '';
for (var i = 0, l = selectorText.length; i < l; i++) {
var c = selectorText.charAt(i);
if (attr) {
if (']' === c || ')' === c) { attr--; }
sel += c;
} else {
if (',' === c) {
sels.push(sel);
sel = '';
} else {
if ('[' === c || '(' === c) { attr++; }
if (sel.length || (c !== ',' && c !== '\n' && c !== ' ')) { sel += c; }
}
}
}
if (sel.length) {
sels.push(sel);
}
return sels;
};
/**
* Returns a parse tree for a CSS source.
* If it encounters multiple selectors separated by a comma, it splits the
* tree.
*
* @param {String} css source
* @api public
*/
exports.parseCSS = function(css) {
var rules = cssom.parse(css).cssRules || [];
var ret = [];
for (var i = 0, l = rules.length; i < l; i++) {
if (rules[i].selectorText) { // media queries don't have selectorText
var rule = rules[i];
var selectors = exports.extract(rule.selectorText);
for (var ii = 0, ll = selectors.length; ii < ll; ii++) {
ret.push([selectors[ii], rule.style]);
}
}
}
return ret;
};
var getStringifiedStyles = function(rule) {
var styles = [];
for (var style = 0; style < rule.style.length; style++) {
var property = rule.style[style];
var value = rule.style[property];
var important = rule.style._importants[property] ? ' !important' : '';
styles.push(' ' + property + ': ' + value + important + ';');
}
return styles;
};
/**
* Returns preserved text for a CSS source.
*
* @param {String} css source
* @param {Object} options
* @api public
*/
exports.getPreservedText = function(css, options) {
var rules = cssom.parse(css).cssRules || [];
var preserved = [];
for (var i = 0, l = rules.length; i < l; i++) {
/* CSS types
STYLE: 1,
IMPORT: 3,
MEDIA: 4,
FONT_FACE: 5,
*/
if (options.fontFaces && rules[i].type === cssom.CSSFontFaceRule.prototype.type) {
var fontFace = [ '' ];
fontFace.push('@font-face {');
fontFace = fontFace.concat(getStringifiedStyles(rules[i]));
fontFace.push('}');
Eif (fontFace.length) {
preserved.push(fontFace.length ? fontFace.join(os.EOL) + os.EOL : '');
}
}
if (options.mediaQueries && rules[i].type === cssom.CSSMediaRule.prototype.type) {
var query = rules[i];
var queryString = [];
queryString.push(os.EOL + '@media ' + query.media[0] + ' {');
for (var ii = 0, ll = query.cssRules.length; ii < ll; ii++) {
var rule = query.cssRules[ii];
Eif (rule.type === cssom.CSSStyleRule.prototype.type
|| rule.type === cssom.CSSFontFaceRule.prototype.type) {
queryString.push(' '
+ (rule.type === cssom.CSSStyleRule.prototype.type ? rule.selectorText : '@font-face') + ' {');
queryString = queryString.concat(getStringifiedStyles(rule));
queryString.push(' }');
}
}
queryString.push('}');
preserved.push(queryString.length ? queryString.join(os.EOL) + os.EOL : '');
}
}
return preserved.join(os.EOL);
};
/**
* Returns a Cheerio object
*
* api public
*/
exports.cheerio = function(html, options) {
options = exports.extend({decodeEntities: false}, options || {});
html = exports.encodeEntities(html);
return cheerio.load(html,options);
};
exports.normalizeLineEndings = function(text) {
return text.replace(/\r\n/g, '\n').replace(/\n/g, '\r\n');
};
exports.encodeEJS = function(html) {
return html.replace(/<%((.|\s)*?)%>/g, function(match, subMatch) {
return '<!--EJS <%' + subMatch + '%> -->';
});
};
exports.decodeEJS = function(html) {
return html.replace(/<!--EJS <%((.|\s)*?)%> -->/g, function(match, subMatch) {
return '<%' + subMatch + '%>';
});
};
exports.encodeEntities = function(html) {
return exports.encodeEJS(html);
};
exports.decodeEntities = function(html) {
return exports.decodeEJS(html);
};
/**
* Converts to array
*
* @api public
*/
exports.toArray = deprecate(function(arr) {
var ret = [];
for (var i = 0, l = arr.length; i < l; i++) {
ret.push(arr[i]);
}
return ret;
}, 'utils.toArray: Will be removed in a future version');
/**
* Compares two specificity vectors, returning the winning one.
*
* @param {Array} vector a
* @param {Array} vector b
* @return {Array}
* @api public
*/
exports.compare = function(a, b) {
for (var i = 0; i < 4; i++) {
if (a[i] === b[i]) { continue; }
if (a[i] > b[i]) { return a; }
return b;
}
return b;
};
exports.extend = function(obj, src) {
for (var key in src) {
Eif (own.call(src, key)) {
obj[key] = src[key];
}
}
return obj;
};
exports.getDefaultOptions = function(options) {
var result = exports.extend({
extraCss: '',
applyStyleTags: true,
removeStyleTags: true,
preserveMediaQueries: false,
preserveFontFaces: false,
applyWidthAttributes: false,
applyHeightAttributes: false,
applyAttributesTableElements: false,
url: ''
}, options);
result.webResources = result.webResources || {};
return result;
}
|