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Savvy
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olf -
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Edit File: extractSourceSpans.js
/** * Split markup into a string of source code and an array mapping ranges in * that string to the text nodes in which they appear. * * <p> * The HTML DOM structure:</p> * <pre> * (Element "p" * (Element "b" * (Text "print ")) ; #1 * (Text "'Hello '") ; #2 * (Element "br") ; #3 * (Text " + 'World';")) ; #4 * </pre> * <p> * corresponds to the HTML * {@code <p><b>print </b>'Hello '<br> + 'World';</p>}.</p> * * <p> * It will produce the output:</p> * <pre> * { * sourceCode: "print 'Hello '\n + 'World';", * // 1 2 * // 012345678901234 5678901234567 * spans: [0, #1, 6, #2, 14, #3, 15, #4] * } * </pre> * <p> * where #1 is a reference to the {@code "print "} text node above, and so * on for the other text nodes. * </p> * * <p> * The {@code} spans array is an array of pairs. Even elements are the start * indices of substrings, and odd elements are the text nodes (or BR elements) * that contain the text for those substrings. * Substrings continue until the next index or the end of the source. * </p> * * @param {Node} node an HTML DOM subtree containing source-code. * @param {boolean|number} isPreformatted truthy if white-space in * text nodes should be considered significant. * @return {SourceSpansT} source code and the nodes in which they occur. */ function extractSourceSpans(node, isPreformatted) { var nocode = /(?:^|\s)nocode(?:\s|$)/; var chunks = []; var length = 0; var spans = []; var k = 0; function walk(node) { var type = node.nodeType; if (type == 1) { // Element if (nocode.test(node.className)) { return; } for (var child = node.firstChild; child; child = child.nextSibling) { walk(child); } var nodeName = node.nodeName.toLowerCase(); if ('br' === nodeName || 'li' === nodeName) { chunks[k] = '\n'; spans[k << 1] = length++; spans[(k++ << 1) | 1] = node; } } else if (type == 3 || type == 4) { // Text var text = node.nodeValue; if (text.length) { if (!isPreformatted) { text = text.replace(/[ \t\r\n]+/g, ' '); } else { text = text.replace(/\r\n?/g, '\n'); // Normalize newlines. } // TODO: handle tabs here? chunks[k] = text; spans[k << 1] = length; length += text.length; spans[(k++ << 1) | 1] = node; } } } walk(node); return { sourceCode: chunks.join('').replace(/\n$/, ''), spans: spans }; }
SavvyWolf - MANAGER