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| 'use strict';
var utils = require('./lib/utils');
var juiceClient = function(html,options) {
var $ = utils.cheerio(html, { xmlMode: options && options.xmlMode});
var doc = juiceDocument($,options);
Iif (options && options.xmlMode) {
return doc.xml();
}
return utils.decodeEntities(doc.html());
};
module.exports = juiceClient;
juiceClient.ignoredPseudos = ['hover', 'active', 'focus', 'visited', 'link'];
juiceClient.widthElements = ['TABLE', 'TD', 'IMG'];
juiceClient.heightElements = ['TABLE', 'TD', 'IMG'];
juiceClient.tableElements = ['TABLE', 'TD', 'TH', 'TR', 'TD', 'CAPTION', 'COLGROUP', 'COL', 'THEAD', 'TBODY', 'TFOOT'];
juiceClient.nonVisualElements = [ 'HEAD', 'TITLE', 'BASE', 'LINK', 'STYLE', 'META', 'SCRIPT', 'NOSCRIPT' ];
juiceClient.styleToAttribute = {
'background-color': 'bgcolor',
'background-image': 'background',
'text-align': 'align',
'vertical-align': 'valign'
};
juiceClient.excludedProperties = [];
juiceClient.juiceDocument = juiceDocument;
juiceClient.inlineDocument = inlineDocument;
juiceClient.inlineContent = inlineContent;
function inlineDocument($, css, options) {
options = options || {};
var rules = utils.parseCSS(css);
var editedElements = [];
rules.forEach(handleRule);
editedElements.forEach(setStyleAttrs);
if (options.inlinePseudoElements) {
editedElements.forEach(inlinePseudoElements);
}
if (options.applyWidthAttributes) {
editedElements.forEach(function(el) {
setDimensionAttrs(el, 'width');
});
}
if (options.applyHeightAttributes) {
editedElements.forEach(function(el) {
setDimensionAttrs(el, 'height');
});
}
if (options.applyAttributesTableElements) {
editedElements.forEach(setAttributesOnTableElements);
}
if (options.insertPreservedExtraCss && options.extraCss) {
var preservedText = utils.getPreservedText(options.extraCss, {
mediaQueries: options.preserveMediaQueries,
fontFaces: options.preserveFontFaces
});
Eif (preservedText) {
var $appendTo = null;
if (options.insertPreservedExtraCss !== true) {
$appendTo = $(options.insertPreservedExtraCss);
} else {
$appendTo = $('head');
Iif (!$appendTo.length) { $appendTo = $('body'); }
Iif (!$appendTo.length) { $appendTo = $.root(); }
}
$appendTo.first().append('<style>' + preservedText + '</style>');
}
}
function handleRule(rule) {
var sel = rule[0];
var style = rule[1];
var selector = new utils.Selector(sel);
var parsedSelector = selector.parsed();
var pseudoElementType = getPseudoElementType(parsedSelector);
// skip rule if the selector has any pseudos which are ignored
for (var i = 0; i < parsedSelector.length; ++i) {
var subSel = parsedSelector[i];
if (subSel.pseudos) {
for (var j = 0; j < subSel.pseudos.length; ++j) {
var subSelPseudo = subSel.pseudos[j];
if (juiceClient.ignoredPseudos.indexOf(subSelPseudo.name) >= 0) {
return;
}
}
}
}
if (pseudoElementType) {
var last = parsedSelector[parsedSelector.length - 1];
var pseudos = last.pseudos;
last.pseudos = filterElementPseudos(last.pseudos);
sel = parsedSelector.toString();
last.pseudos = pseudos;
}
var els;
try {
els = $(sel);
} catch (err) {
// skip invalid selector
return;
}
els.each(function() {
var el = this;
if (el.name && juiceClient.nonVisualElements.indexOf(el.name.toUpperCase()) >= 0) {
return;
}
if (pseudoElementType) {
var pseudoElPropName = 'pseudo' + pseudoElementType;
var pseudoEl = el[pseudoElPropName];
if (!pseudoEl) {
pseudoEl = el[pseudoElPropName] = $('<span />').get(0);
pseudoEl.pseudoElementType = pseudoElementType;
pseudoEl.pseudoElementParent = el;
el[pseudoElPropName] = pseudoEl;
}
el = pseudoEl;
}
if (!el.styleProps) {
el.styleProps = {};
// if the element has inline styles, fake selector with topmost specificity
if ($(el).attr('style')) {
var cssText = '* { ' + $(el).attr('style') + ' } ';
addProps(utils.parseCSS(cssText)[0][1], utils.styleSelector);
}
// store reference to an element we need to compile style="" attr for
editedElements.push(el);
}
// go through the properties
function addProps(style, selector) {
for (var i = 0, l = style.length; i < l; i++) {
var name = style[i];
var value = style[name] + (options.preserveImportant && style._importants[name] ? ' !important' : '');
var prop = new utils.Property(name, value, selector, style._importants[name] ? 2 : 0);
var existing = el.styleProps[name];
// if property name is not in the excluded properties array
if (juiceClient.excludedProperties.indexOf(name) < 0) {
if (existing && existing.compare(prop) === prop || !existing) {
el.styleProps[name] = prop;
}
}
}
}
addProps(style, selector);
});
}
function setStyleAttrs(el) {
var props = Object.keys(el.styleProps).map(function(key) {
return el.styleProps[key];
});
// sort properties by their originating selector's specificity so that
// props like "padding" and "padding-bottom" are resolved as expected.
props.sort(function(a, b) {
return a.selector.specificity().join('').localeCompare(
b.selector.specificity().join(''));
});
var string = props
.filter(function(prop) {
// Content becomes the innerHTML of pseudo elements, not used as a
// style property
return prop.prop !== 'content';
})
.map(function(prop) {
return prop.prop + ': ' + prop.value.replace(/["]/g, '\'') + ';';
})
.join(' ');
if (string) {
$(el).attr('style', string);
}
}
function inlinePseudoElements(el) {
if (el.pseudoElementType && el.styleProps.content) {
$(el).html(parseContent(el.styleProps.content.value));
var parent = el.pseudoElementParent;
if (el.pseudoElementType === 'before') {
$(parent).prepend(el);
} else {
$(parent).append(el);
}
}
}
function setDimensionAttrs(el, dimension) {
Iif (!el.name) { return; }
var elName = el.name.toUpperCase();
if (juiceClient[dimension + 'Elements'].indexOf(elName) > -1) {
for (var i in el.styleProps) {
Eif (el.styleProps[i].prop === dimension) {
if (el.styleProps[i].value.match(/px/)) {
var pxSize = el.styleProps[i].value.replace('px', '');
$(el).attr(dimension, pxSize);
return;
}
if (juiceClient.tableElements.indexOf(elName) > -1 && el.styleProps[i].value.match(/\%/)) {
$(el).attr(dimension, el.styleProps[i].value);
return;
}
}
}
}
}
function setAttributesOnTableElements(el) {
Iif (!el.name) { return; }
var elName = el.name.toUpperCase();
var styleProps = Object.keys(juiceClient.styleToAttribute);
if (juiceClient.tableElements.indexOf(elName) > -1) {
for (var i in el.styleProps) {
Eif (styleProps.indexOf(el.styleProps[i].prop) > -1) {
$(el).attr(juiceClient.styleToAttribute[el.styleProps[i].prop], el.styleProps[i].value);
}
}
}
}
}
function parseContent(content) {
Iif (content === 'none' || content === 'normal') {
return '';
}
// Naive parsing, assume well-formed value
content = content.slice(1, content.length - 1);
// Naive unescape, assume no unicode char codes
content = content.replace(/\\/g, '');
return content;
}
// Return "before" or "after" if the given selector is a pseudo element (e.g.,
// a::after).
function getPseudoElementType(selector) {
Iif (selector.length === 0) {
return;
}
var pseudos = selector[selector.length - 1].pseudos;
if (!pseudos) {
return;
}
for (var i = 0; i < pseudos.length; i++) {
if (isPseudoElementName(pseudos[i])) {
return pseudos[i].name;
}
}
}
function isPseudoElementName(pseudo) {
return pseudo.name === 'before' || pseudo.name === 'after';
}
function filterElementPseudos(pseudos) {
return pseudos.filter(function(pseudo) {
return !isPseudoElementName(pseudo);
});
}
function juiceDocument($, options) {
options = utils.getDefaultOptions(options);
var css = extractCssFromDocument($, options);
css += '\n' + options.extraCss;
inlineDocument($, css, options);
return $;
}
function inlineContent(html, css, options) {
var $ = utils.cheerio(html, { xmlMode: options && options.xmlMode});
inlineDocument($, css, options);
Iif (options && options.xmlMode) {
return $.xml();
}
return utils.decodeEntities($.html());
}
function getStylesData($, options) {
var results = [];
var stylesList = $('style');
var styleDataList, styleData, styleElement;
stylesList.each(function() {
styleElement = this;
styleDataList = styleElement.childNodes;
Iif (styleDataList.length !== 1) {
return;
}
styleData = styleDataList[0].data;
if (options.applyStyleTags && styleElement.attribs['data-embed'] === undefined) {
results.push(styleData);
}
if (options.removeStyleTags && styleElement.attribs['data-embed'] === undefined) {
var preservedText = utils.getPreservedText(styleElement.childNodes[0].nodeValue, {
mediaQueries: options.preserveMediaQueries,
fontFaces: options.preserveFontFaces
});
if (preservedText) {
styleElement.childNodes[0].nodeValue = preservedText;
} else {
$(styleElement).remove();
}
}
delete styleElement.attribs['data-embed'];
});
return results;
}
function extractCssFromDocument($, options) {
var results = getStylesData($, options);
var css = results.join('\n');
return css;
}
|