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add basic support for MathML

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alexadam 2016-09-02 12:08:57 +03:00
parent 99e5f82ca2
commit a9624b8df9
1 changed files with 26 additions and 14 deletions
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40
web-extension/extractHtml.js
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@ -1,13 +1,16 @@
var allImages = [];
var extractedImages = [];
var maxNrOfElements = 10000;
var maxNrOfElements = 20000;
var allowedTags = [
'address', 'article', 'aside', 'footer', 'header', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6',
'hgroup', 'nav', 'section', 'dd', 'div', 'dl', 'dt', 'figcaption', 'figure', 'hr', 'li',
'main', 'ol', 'p', 'pre', 'ul', 'a', 'abbr', 'b', 'bdi', 'bdo', 'br', 'cite', 'code', 'data',
'dfn', 'em', 'i', 'img', 'kbd', 'mark', 'q', 'rp', 'rt', 'rtc', 'ruby', 's', 'samp', 'small', 'span',
'strong', 'sub', 'sup', 'time', 'u', 'var', 'wbr', 'del', 'ins', 'caption', 'col', 'colgroup',
'table', 'tbody', 'td', 'tfoot', 'th', 'thead', 'tr'
'table', 'tbody', 'td', 'tfoot', 'th', 'thead', 'tr',
'math', 'maction', 'menclose', 'merror', 'mfenced', 'mfrac', 'mglyph', 'mi', 'mlabeledtr', 'mmultiscripts', 'mn', 'mo', 'mover', 'mpadded', 'mphantom', 'mroot',
'mrow', 'ms', 'mspace', 'msqrt', 'mstyle', 'msub', 'msup', 'msubsup', 'mtable', 'mtd', 'mtext', 'mtr', 'munder', 'munderover', 'msgroup', 'mlongdiv', 'mscarries',
'mscarry', 'mstack'
];
//////
@ -54,16 +57,27 @@ function formatPreCodeElements($jQueryElement) {
});
}
function force(contentString) {
function preProcess($htmlObject) {
$htmlObject.find('script[type="math/mml"]').each(function (i, el) {
$(el).replaceWith('<span>' + el.innerHTML + '</span>');
});
$htmlObject.find('script, style, svg, canvas, noscript, iframe').remove();
$htmlObject.find('*:empty').not('img').remove();
$htmlObject.find('*[class^="mjx-chtml"]').remove(); // MathJax formatting
formatPreCodeElements($htmlObject);
}
function force($content, withError) {
try {
var tagOpen = '@@@' + generateRandomTag();
var tagClose = '###' + generateRandomTag();
var startEl = '<object>';
var endEl = '</object>';
var $content = $(contentString);
formatPreCodeElements($content);
if (withError) {
$content = $(content);
preProcess($content);
}
$content.find('img').each(function (index, elem) {
$(elem).replaceWith(startEl + tagOpen + 'img src="' + getImageSrc($(elem).attr('src').trim()) + '"' + tagClose + tagOpen + '/img' + tagClose + endEl);
@ -84,7 +98,7 @@ function force(contentString) {
});
}
contentString = $content.text();
var contentString = $content.text();
var tagOpenRegex = new RegExp(tagOpen, 'gi');
var tagCloseRegex = new RegExp(tagClose, 'gi');
@ -98,7 +112,6 @@ function force(contentString) {
}
}
// https://github.com/blowsie/Pure-JavaScript-HTML5-Parser
function sanitize(rawContentString) {
allImages = [];
extractedImages = [];
@ -107,16 +120,15 @@ function sanitize(rawContentString) {
try {
var wdirty = $.parseHTML(rawContentString);
$wdirty = $(wdirty);
$wdirty.find('script, style, svg, canvas, noscript, iframe').remove();
$wdirty.find('*:empty').not('img').remove();
formatPreCodeElements($wdirty);
dirty = '<div>' + $wdirty.html() + '</div>';
preProcess($wdirty);
if ($('*').length > maxNrOfElements) {
return force(dirty);
return force($wdirty, false);
}
dirty = '<div>' + $wdirty.html() + '</div>';
var results = '';
var lastFragment = '';
var lastTag = '';
@ -174,7 +186,7 @@ function sanitize(rawContentString) {
} catch (e) {
console.log('Error:', e);
return force(dirty);
return force(dirty, true);
}
}