mirror of
https://github.com/bulletphysics/bullet3
synced 2024-12-13 21:30:09 +00:00
103 lines
3.8 KiB
JavaScript
103 lines
3.8 KiB
JavaScript
/** Converts <>&" to their HTML escape sequences */
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function escapeHTMLEntities(str) {
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return String(str).replace(/&/g, '&').replace(/</g, '<').replace(/>/g, '>').replace(/"/g, '"');
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}
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/** Restores the original source string's '<' and '>' as entered in
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the document, before the browser processed it as HTML. There is no
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way in an HTML document to distinguish an entity that was entered
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as an entity.*/
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function unescapeHTMLEntities(str) {
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// Process & last so that we don't recursively unescape
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// escaped escape sequences.
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return str.
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replace(/</g, '<').
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replace(/>/g, '>').
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replace(/"/g, '"').
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replace(/'/g, "'").
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replace(/–/g, '--').
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replace(/—/g, '---').
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replace(/&/g, '&');
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}
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/**
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\param node A node from an HTML DOM
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\return A String that is a very good reconstruction of what the
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original source looked like before the browser tried to correct
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it to legal HTML.
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*/
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function nodeToMarkdeepSource(node, leaveEscapes) {
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var source = node.innerHTML;
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// Markdown uses <john@bar.com> e-mail syntax, which HTML parsing
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// will try to close by inserting the matching close tags at the end of the
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// document. Remove anything that looks like that and comes *after*
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// the first fallback style.
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source = source.replace(/(?:<style class="fallback">[\s\S]*?<\/style>[\s\S]*)<\/\S+@\S+\.\S+?>/gim, '');
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// Remove artificially inserted close tags
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source = source.replace(/<\/h?ttps?:.*>/gi, '');
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// Now try to fix the URLs themselves, which will be
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// transformed like this: <http: casual-effects.com="" markdeep="">
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source = source.replace(/<(https?): (.*?)>/gi, function (match, protocol, list) {
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// Remove any quotes--they wouldn't have been legal in the URL anyway
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var s = '<' + protocol + '://' + list.replace(/=""\s/g, '/');
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if (s.substring(s.length - 3) === '=""') {
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s = s.substring(0, s.length - 3);
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}
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// Remove any lingering quotes (since they
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// wouldn't have been legal in the URL)
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s = s.replace(/"/g, '');
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return s + '>';
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});
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// Remove the "fallback" style tags
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source = source.replace(/<style class=["']fallback["']>.*?<\/style>/gmi, '');
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source = unescapeHTMLEntities(source);
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return source;
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}
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// $ (FULL_DOCUMENT_HEAD) is replaced by the contents of the <head> found in
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// PreviewBlogPage.htm. This document head will overwrite whatever Markdeep does to
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// the head at the very end.
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FullDocumentHead='\
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$(FULL_DOCUMENT_HEAD)\
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';
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// This code is placed at the beginning of the body before the Markdeep code.
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// $ (DOCUMENT_BODY_PREFIX) is everything in the body of PreviewBlogPage.htm up to
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// $ (ARTICLE_HTML_CODE).
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DocumentBodyPrefix='\
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$(DOCUMENT_BODY_PREFIX)\
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<!-- MARKDEEP_BEGIN -->\
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<pre class="markdeep">\
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';
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// This code is placed at the end of the body after the Markdeep code.
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// $ (DOCUMENT_BODY_SUFFIX) is everything in the body of PreviewBlogPage.htm after
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// $ (ARTICLE_HTML_CODE).
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DocumentBodySuffix='\
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</pre>\
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<!-- MARKDEEP_END -->\
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<div>Document <body> code:<br/>\
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<textarea cols="40" rows="10" id="BodyDisplayBox"></textarea></div>\
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$(DOCUMENT_BODY_SUFFIX)\
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';
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// Get the full Markdeep code from the .md.html file without the script invocation
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MarkdeepCode=nodeToMarkdeepSource(document.body);
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MarkdeepCode=MarkdeepCode.slice(0,MarkdeepCode.lastIndexOf("<script"));
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// Bring it into a form where it can be pasted into an HTML document
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SanitizedMarkdeepCode=escapeHTMLEntities(MarkdeepCode);
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// Surround it by the prefix and suffix code and set that as body code
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document.body.innerHTML=DocumentBodyPrefix+SanitizedMarkdeepCode+DocumentBodySuffix;
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