mirror of
https://github.com/classilla/tenfourfox.git
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109 lines
3.9 KiB
JavaScript
109 lines
3.9 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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const LINKIFY_TIMEOUT = 0;
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function Linkifier() {
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this._linkifyTimer = null;
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this._phoneRegex = /(?:\s|^)[\+]?(\(?\d{1,8}\)?)?([- ]+\(?\d{1,8}\)?)+( ?(x|ext) ?\d{1,3})?(?:\s|$)/g;
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}
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Linkifier.prototype = {
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_buildAnchor : function(aDoc, aNumberText) {
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let anchorNode = aDoc.createElement("a");
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let cleanedText = "";
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for (let i = 0; i < aNumberText.length; i++) {
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let c = aNumberText.charAt(i);
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if ((c >= '0' && c <= '9') || c == '+') //assuming there is only the leading '+'.
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cleanedText += c;
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}
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anchorNode.setAttribute("href", "tel:" + cleanedText);
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let nodeText = aDoc.createTextNode(aNumberText);
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anchorNode.appendChild(nodeText);
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return anchorNode;
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},
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_linkifyNodeNumbers : function(aNodeToProcess, aDoc) {
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let parent = aNodeToProcess.parentNode;
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let nodeText = aNodeToProcess.nodeValue;
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// Replacing the original text node with a sequence of
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// |text before number|anchor with number|text after number nodes.
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// Each step a couple of (optional) text node and anchor node are appended.
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let anchorNode = null;
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let m = null;
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let startIndex = 0;
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let prevNode = null;
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while (m = this._phoneRegex.exec(nodeText)) {
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anchorNode = this._buildAnchor(aDoc, nodeText.substr(m.index, m[0].length));
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let textExistsBeforeNumber = (m.index > startIndex);
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let nodeToAdd = null;
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if (textExistsBeforeNumber)
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nodeToAdd = aDoc.createTextNode(nodeText.substr(startIndex, m.index - startIndex));
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else
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nodeToAdd = anchorNode;
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if (!prevNode) // first time, need to replace the whole node with the first new one.
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parent.replaceChild(nodeToAdd, aNodeToProcess);
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else
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parent.insertBefore(nodeToAdd, prevNode.nextSibling); //inserts after.
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if (textExistsBeforeNumber) // if we added the text node before the anchor, we still need to add the anchor node.
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parent.insertBefore(anchorNode, nodeToAdd.nextSibling);
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// next nodes need to be appended to this node.
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prevNode = anchorNode;
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startIndex = m.index + m[0].length;
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}
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// if some text is remaining after the last anchor.
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if (startIndex > 0 && startIndex < nodeText.length) {
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let lastNode = aDoc.createTextNode(nodeText.substr(startIndex));
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parent.insertBefore(lastNode, prevNode.nextSibling);
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return lastNode;
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}
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return anchorNode;
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},
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linkifyNumbers: function(aDoc) {
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// Removing any installed timer in case the page has changed and a previous timer is still running.
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if (this._linkifyTimer) {
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clearTimeout(this._linkifyTimer);
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this._linkifyTimer = null;
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}
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let filterNode = function (node) {
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if (node.parentNode.tagName != 'A' &&
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node.parentNode.tagName != 'SCRIPT' &&
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node.parentNode.tagName != 'NOSCRIPT' &&
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node.parentNode.tagName != 'STYLE' &&
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node.parentNode.tagName != 'APPLET' &&
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node.parentNode.tagName != 'TEXTAREA')
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return NodeFilter.FILTER_ACCEPT;
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else
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return NodeFilter.FILTER_REJECT;
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}
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let nodeWalker = aDoc.createTreeWalker(aDoc.body, NodeFilter.SHOW_TEXT, filterNode, false);
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let parseNode = function() {
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let node = nodeWalker.nextNode();
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if (!node) {
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this._linkifyTimer = null;
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return;
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}
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let lastAddedNode = this._linkifyNodeNumbers(node, aDoc);
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// we assign a different timeout whether the node was processed or not.
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if (lastAddedNode) {
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nodeWalker.currentNode = lastAddedNode;
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this._linkifyTimer = setTimeout(parseNode, LINKIFY_TIMEOUT);
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} else {
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this._linkifyTimer = setTimeout(parseNode, LINKIFY_TIMEOUT);
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}
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}.bind(this);
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this._linkifyTimer = setTimeout(parseNode, LINKIFY_TIMEOUT);
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}
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};
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