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mobile/android/chrome/content/Linkify.js@b8a032363ba2 (annotated)

mobile/android/chrome/content/Linkify.js

Thu, 22 Jan 2015 13:21:57 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Thu, 22 Jan 2015 13:21:57 +0100

branch

TOR_BUG_9701

changeset 15

b8a032363ba2

permissions

-rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

michael@0	1	/* This Source Code Form is subject to the terms of the Mozilla Public
michael@0	2	* License, v. 2.0. If a copy of the MPL was not distributed with this file,
michael@0	3	* You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0	4
michael@0	5	const LINKIFY_TIMEOUT = 0;
michael@0	6
michael@0	7	function Linkifier() {
michael@0	8	this._linkifyTimer = null;
michael@0	9	this._phoneRegex = /(?:\s|^)[\+]?(\(?\d{1,8}\)?)?([- ]+\(?\d{1,8}\)?)+( ?(x|ext) ?\d{1,3})?(?:\s|$)/g;
michael@0	10	}
michael@0	11
michael@0	12	Linkifier.prototype = {
michael@0	13	_buildAnchor : function(aDoc, aNumberText) {
michael@0	14	let anchorNode = aDoc.createElement("a");
michael@0	15	let cleanedText = "";
michael@0	16	for (let i = 0; i < aNumberText.length; i++) {
michael@0	17	let c = aNumberText.charAt(i);
michael@0	18	if ((c >= '0' && c <= '9') || c == '+') //assuming there is only the leading '+'.
michael@0	19	cleanedText += c;
michael@0	20	}
michael@0	21	anchorNode.setAttribute("href", "tel:" + cleanedText);
michael@0	22	let nodeText = aDoc.createTextNode(aNumberText);
michael@0	23	anchorNode.appendChild(nodeText);
michael@0	24	return anchorNode;
michael@0	25	},
michael@0	26
michael@0	27	_linkifyNodeNumbers : function(aNodeToProcess, aDoc) {
michael@0	28	let parent = aNodeToProcess.parentNode;
michael@0	29	let nodeText = aNodeToProcess.nodeValue;
michael@0	30
michael@0	31	// Replacing the original text node with a sequence of
michael@0	32	// |text before number|anchor with number|text after number nodes.
michael@0	33	// Each step a couple of (optional) text node and anchor node are appended.
michael@0	34	let anchorNode = null;
michael@0	35	let m = null;
michael@0	36	let startIndex = 0;
michael@0	37	let prevNode = null;
michael@0	38	while (m = this._phoneRegex.exec(nodeText)) {
michael@0	39	anchorNode = this._buildAnchor(aDoc, nodeText.substr(m.index, m[0].length));
michael@0	40
michael@0	41	let textExistsBeforeNumber = (m.index > startIndex);
michael@0	42	let nodeToAdd = null;
michael@0	43	if (textExistsBeforeNumber)
michael@0	44	nodeToAdd = aDoc.createTextNode(nodeText.substr(startIndex, m.index - startIndex));
michael@0	45	else
michael@0	46	nodeToAdd = anchorNode;
michael@0	47
michael@0	48	if (!prevNode) // first time, need to replace the whole node with the first new one.
michael@0	49	parent.replaceChild(nodeToAdd, aNodeToProcess);
michael@0	50	else
michael@0	51	parent.insertBefore(nodeToAdd, prevNode.nextSibling); //inserts after.
michael@0	52
michael@0	53	if (textExistsBeforeNumber) // if we added the text node before the anchor, we still need to add the anchor node.
michael@0	54	parent.insertBefore(anchorNode, nodeToAdd.nextSibling);
michael@0	55
michael@0	56	// next nodes need to be appended to this node.
michael@0	57	prevNode = anchorNode;
michael@0	58	startIndex = m.index + m[0].length;
michael@0	59	}
michael@0	60
michael@0	61	// if some text is remaining after the last anchor.
michael@0	62	if (startIndex > 0 && startIndex < nodeText.length) {
michael@0	63	let lastNode = aDoc.createTextNode(nodeText.substr(startIndex));
michael@0	64	parent.insertBefore(lastNode, prevNode.nextSibling);
michael@0	65	return lastNode;
michael@0	66	}
michael@0	67	return anchorNode;
michael@0	68	},
michael@0	69
michael@0	70	linkifyNumbers: function(aDoc) {
michael@0	71	// Removing any installed timer in case the page has changed and a previous timer is still running.
michael@0	72	if (this._linkifyTimer) {
michael@0	73	clearTimeout(this._linkifyTimer);
michael@0	74	this._linkifyTimer = null;
michael@0	75	}
michael@0	76
michael@0	77	let filterNode = function (node) {
michael@0	78	if (node.parentNode.tagName != 'A' &&
michael@0	79	node.parentNode.tagName != 'SCRIPT' &&
michael@0	80	node.parentNode.tagName != 'NOSCRIPT' &&
michael@0	81	node.parentNode.tagName != 'STYLE' &&
michael@0	82	node.parentNode.tagName != 'APPLET' &&
michael@0	83	node.parentNode.tagName != 'TEXTAREA')
michael@0	84	return NodeFilter.FILTER_ACCEPT;
michael@0	85	else
michael@0	86	return NodeFilter.FILTER_REJECT;
michael@0	87	}
michael@0	88
michael@0	89	let nodeWalker = aDoc.createTreeWalker(aDoc.body, NodeFilter.SHOW_TEXT, filterNode, false);
michael@0	90	let parseNode = function() {
michael@0	91	let node = nodeWalker.nextNode();
michael@0	92	if (!node) {
michael@0	93	this._linkifyTimer = null;
michael@0	94	return;
michael@0	95	}
michael@0	96	let lastAddedNode = this._linkifyNodeNumbers(node, aDoc);
michael@0	97	// we assign a different timeout whether the node was processed or not.
michael@0	98	if (lastAddedNode) {
michael@0	99	nodeWalker.currentNode = lastAddedNode;
michael@0	100	this._linkifyTimer = setTimeout(parseNode, LINKIFY_TIMEOUT);
michael@0	101	} else {
michael@0	102	this._linkifyTimer = setTimeout(parseNode, LINKIFY_TIMEOUT);
michael@0	103	}
michael@0	104	}.bind(this);
michael@0	105
michael@0	106	this._linkifyTimer = setTimeout(parseNode, LINKIFY_TIMEOUT);
michael@0	107	}
michael@0	108	};