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Savvy
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olf -
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Edit File: numberLines.js
/** * Given a DOM subtree, wraps it in a list, and puts each line into its own * list item. * * @param {Node} node modified in place. Its content is pulled into an * HTMLOListElement, and each line is moved into a separate list item. * This requires cloning elements, so the input might not have unique * IDs after numbering. * @param {number|null|boolean} startLineNum * If truthy, coerced to an integer which is the 1-indexed line number * of the first line of code. The number of the first line will be * attached to the list. * @param {boolean} isPreformatted true iff white-space in text nodes should * be treated as significant. */ function numberLines(node, startLineNum, isPreformatted) { var nocode = /(?:^|\s)nocode(?:\s|$)/; var lineBreak = /\r\n?|\n/; var document = node.ownerDocument; var li = document.createElement('li'); while (node.firstChild) { li.appendChild(node.firstChild); } // An array of lines. We split below, so this is initialized to one // un-split line. var listItems = [li]; function walk(node) { var type = node.nodeType; if (type == 1 && !nocode.test(node.className)) { // Element if ('br' === node.nodeName.toLowerCase()) { breakAfter(node); // Discard the <BR> since it is now flush against a </LI>. if (node.parentNode) { node.parentNode.removeChild(node); } } else { for (var child = node.firstChild; child; child = child.nextSibling) { walk(child); } } } else if ((type == 3 || type == 4) && isPreformatted) { // Text var text = node.nodeValue; var match = text.match(lineBreak); if (match) { var firstLine = text.substring(0, match.index); node.nodeValue = firstLine; var tail = text.substring(match.index + match[0].length); if (tail) { var parent = node.parentNode; parent.insertBefore( document.createTextNode(tail), node.nextSibling); } breakAfter(node); if (!firstLine) { // Don't leave blank text nodes in the DOM. node.parentNode.removeChild(node); } } } } // Split a line after the given node. function breakAfter(lineEndNode) { // If there's nothing to the right, then we can skip ending the line // here, and move root-wards since splitting just before an end-tag // would require us to create a bunch of empty copies. while (!lineEndNode.nextSibling) { lineEndNode = lineEndNode.parentNode; if (!lineEndNode) { return; } } function breakLeftOf(limit, copy) { // Clone shallowly if this node needs to be on both sides of the break. var rightSide = copy ? limit.cloneNode(false) : limit; var parent = limit.parentNode; if (parent) { // We clone the parent chain. // This helps us resurrect important styling elements that cross lines. // E.g. in <i>Foo<br>Bar</i> // should be rewritten to <li><i>Foo</i></li><li><i>Bar</i></li>. var parentClone = breakLeftOf(parent, 1); // Move the clone and everything to the right of the original // onto the cloned parent. var next = limit.nextSibling; parentClone.appendChild(rightSide); for (var sibling = next; sibling; sibling = next) { next = sibling.nextSibling; parentClone.appendChild(sibling); } } return rightSide; } var copiedListItem = breakLeftOf(lineEndNode.nextSibling, 0); // Walk the parent chain until we reach an unattached LI. for (var parent; // Check nodeType since IE invents document fragments. (parent = copiedListItem.parentNode) && parent.nodeType === 1;) { copiedListItem = parent; } // Put it on the list of lines for later processing. listItems.push(copiedListItem); } // Split lines while there are lines left to split. for (var i = 0; // Number of lines that have been split so far. i < listItems.length; // length updated by breakAfter calls. ++i) { walk(listItems[i]); } // Make sure numeric indices show correctly. if (startLineNum === (startLineNum|0)) { listItems[0].setAttribute('value', startLineNum); } var ol = document.createElement('ol'); ol.className = 'linenums'; var offset = Math.max(0, ((startLineNum - 1 /* zero index */)) | 0) || 0; for (var i = 0, n = listItems.length; i < n; ++i) { li = listItems[i]; // Stick a class on the LIs so that stylesheets can // color odd/even rows, or any other row pattern that // is co-prime with 10. li.className = 'L' + ((i + offset) % 10); if (!li.firstChild) { li.appendChild(document.createTextNode('\xA0')); } ol.appendChild(li); } node.appendChild(ol); }
SavvyWolf - MANAGER