pjs/suite/browser/linkToolbarHandler.js

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8.8 KiB
JavaScript

/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Eric Hodel's <drbrain@segment7.net> code.
*
* The Initial Developer of the Original Code is
* Eric Hodel.
* Portions created by the Initial Developer are Copyright (C) 2001
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Christopher Hoess <choess@force.stwing.upenn.edu>
* Tim Taylor <tim@tool-man.org>
* Stuart Ballard <sballard@netreach.net>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/**
* LinkToolbarHandler is a Singleton that displays LINK elements
* and nodeLists of LINK elements in the Link Toolbar. It
* associates the LINK with a corresponding LinkToolbarItem based
* on it's REL attribute and the toolbar item's ID attribute.
* LinkToolbarHandler is also a Factory and will create
* LinkToolbarItems as necessary.
*/
function LinkToolbarHandler()
{
this.items = new Array();
this.hasItems = false;
}
LinkToolbarHandler.prototype.handleLinks =
function(nodeList)
{
if (!nodeList) return;
var len = nodeList.length;
for (var i = 0; i < len; i++) {
// optimization: weed out useless links here to avoid
// the function call. More in depth checks are done
// in this.handle
var node = nodeList.item(i);
if (node && (node.rel || node.rev) && node.href)
this.handle(node);
}
}
LinkToolbarHandler.prototype.handle =
function(element)
{
// XXX: if you're going to re-enable handling of anchor elements,
// you'll want to change this to AnchorElementDecorator
var linkElement = new LinkElementDecorator(element);
if (linkElement.isIgnored()) return;
this.hasItems = true;
var relAttributes = linkElement.rel.split(" ");
for (var i = 0; i < relAttributes.length; i++) {
var linkType = LinkToolbarHandler.getLinkType(relAttributes[i]);
this.getItemForLinkType(linkType).displayLink(linkElement);
}
}
LinkToolbarHandler.getLinkType =
function(relAttribute)
{
switch (relAttribute.toLowerCase()) {
case "home":
case "start":
case "top":
case "origin":
return "top";
case "up":
case "parent":
return "up";
case "begin":
case "first":
return "first";
case "next":
case "child":
return "next";
case "prev":
case "previous":
return "prev";
case "end":
case "last":
return "last";
case "author":
case "made":
return "author";
case "contents":
case "toc":
return "toc";
default:
return relAttribute.toLowerCase();
}
}
LinkToolbarHandler.prototype.getItemForLinkType =
function(linkType) {
if (!this.items[linkType])
this.items[linkType] = LinkToolbarHandler.createItemForLinkType(linkType);
return this.items[linkType];
}
LinkToolbarHandler.createItemForLinkType =
function(linkType)
{
if (!document.getElementById("link-" + linkType))
return new LinkToolbarTransientMenu(linkType);
// XXX: replace switch with polymorphism
switch(document.getElementById("link-" + linkType).localName) {
case "toolbarbutton":
return new LinkToolbarButton(linkType);
case "menuitem":
return new LinkToolbarItem(linkType);
case "menu":
return new LinkToolbarMenu(linkType);
default:
return new LinkToolbarTransientMenu(linkType);
}
}
LinkToolbarHandler.prototype.clearAllItems =
function()
{
for (var linkType in this.items)
this.items[linkType].clear();
this.hasItems = false;
}
const linkToolbarHandler = new LinkToolbarHandler();
function LinkElementDecorator(element) {
/*
* XXX: this is an incomplete decorator, because it doesn't implement
* the full Element interface. If you need to use a method
* or member in the Element interface, just add it here and
* have it delegate to this.element
*
* XXX: would rather add some methods to Element.prototype instead of
* using a decorator, but Element.prototype is no longer exposed
* since the XPCDOM landing, see bug 83433
*/
if (!element) return; // skip the rest on foo.prototype = new ThisClass calls
this.element = element;
this.rel = LinkElementDecorator.convertRevMade(element.rel, element.rev);
this.rev = element.rev;
this.title = element.title;
this.href = element.href;
this.hreflang = element.hreflang;
this.media = element.media;
this.longTitle = null;
}
LinkElementDecorator.prototype.isIgnored =
function()
{
if (!this.rel) return true;
if (this.isStylesheet()) return true;
if (this.isIcon()) return true;
return false;
}
LinkElementDecorator.prototype.isStylesheet =
function() {
if (LinkElementDecorator.findWord("stylesheet", this.rel.toLowerCase()))
return true;
else
return false;
}
LinkElementDecorator.prototype.isIcon =
function() {
if (LinkElementDecorator.findWord("icon", this.rel.toLowerCase()))
return true;
else
return false;
return false;
}
LinkElementDecorator.convertRevMade =
function(rel, rev)
{
if (!rel && rev && LinkElementDecorator.findWord("made", rev.toLowerCase()))
return rev;
else
return rel;
}
LinkElementDecorator.prototype.getTooltip =
function()
{
return this.getLongTitle() != "" ? this.getLongTitle() : this.href;
}
LinkElementDecorator.prototype.getLabel =
function()
{
return this.getLongTitle() != "" ? this.getLongTitle() : this.rel;
}
LinkElementDecorator.prototype.getLongTitle =
function()
{
if (this.longTitle == null)
this.longTitle = this.makeLongTitle();
return this.longTitle;
}
LinkElementDecorator.prototype.makeLongTitle =
function()
{
var prefix = "";
// XXX: lookup more meaningful and localized version of media,
// i.e. media="print" becomes "Printable" or some such
// XXX: use localized version of ":" separator
if (this.media
&& !LinkElementDecorator.findWord("all", this.media.toLowerCase())
&& !LinkElementDecorator.findWord("screen", this.media.toLowerCase()))
prefix += this.media + ": ";
if (this.hreflang)
prefix += languageDictionary.lookupLanguageName(this.hreflang)
+ ": ";
return this.title ? prefix + this.title : prefix;
}
LinkElementDecorator.findWord =
function(word, string)
{
var barePattern = eval("/^" + word + "$/");
var middlePattern = eval("/[-\\W]" + word + "[-\\W]/");
var startPattern = eval("/^" + word + "[-\\W]/");
var endPattern = eval("/[-\\W]" + word + "$/");
if (string.search(barePattern) != -1)
return true;
if (string.search(middlePattern) != -1)
return true;
if (string.search(startPattern) != -1)
return true;
if (string.search(endPattern) != -1)
return true;
return false;
}
function AnchorElementDecorator(element) {
this.constructor(element);
}
AnchorElementDecorator.prototype = new LinkElementDecorator;
AnchorElementDecorator.prototype.getLongTitle =
function()
{
return this.title ? this.__proto__.getLongTitle.apply(this)
: getText(this.element);
}
AnchorElementDecorator.prototype.getText =
function(element)
{
return condenseWhitespace(getTextRecursive(element));
}
AnchorElementDecorator.prototype.getTextRecursive =
function(node)
{
var text = "";
node.normalize();
if (node.hasChildNodes()) {
for (var i = 0; i < node.childNodes.length; i++) {
if (node.childNodes.item(i).nodeType == Node.TEXT_NODE)
text += node.childNodes.item(i).nodeValue;
else if (node.childNodes.item(i).nodeType == Node.ELEMENT_NODE)
text += getTextRecursive(node.childNodes.item(i));
}
}
return text;
}
AnchorElementDecorator.prototype.condenseWhitespace =
function(text)
{
return text.replace(/\W*$/, "").replace(/^\W*/, "").replace(/\W+/g, " ");
}