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30ae66ac14
--HG-- branch : mobile extra : convert_revision : svn%3A4eb1ac78-321c-0410-a911-ec516a8615a5/projects/fennec/mobile%4012383
198 lines
6.8 KiB
JavaScript
198 lines
6.8 KiB
JavaScript
/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Mobile Browser.
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*
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* The Initial Developer of the Original Code is
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* Mozilla Corporation.
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* Portions created by the Initial Developer are Copyright (C) 2008
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Mark Finkle <mfinkle@mozilla.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/**
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* Command Updater
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*/
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var CommandUpdater = {
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/**
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* Gets a controller that can handle a particular command.
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* @param command
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* A command to locate a controller for, preferring controllers that
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* show the command as enabled.
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* @returns In this order of precedence:
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* - the first controller supporting the specified command
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* associated with the focused element that advertises the
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* command as ENABLED
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* - the first controller supporting the specified command
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* associated with the global window that advertises the
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* command as ENABLED
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* - the first controller supporting the specified command
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* associated with the focused element
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* - the first controller supporting the specified command
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* associated with the global window
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*/
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_getControllerForCommand: function(command) {
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try {
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var controller = top.document.commandDispatcher.getControllerForCommand(command);
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if (controller && controller.isCommandEnabled(command))
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return controller;
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}
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catch(e) {
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}
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var controllerCount = window.controllers.getControllerCount();
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for (var i = 0; i < controllerCount; ++i) {
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var current = window.controllers.getControllerAt(i);
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try {
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if (current.supportsCommand(command) && current.isCommandEnabled(command))
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return current;
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}
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catch (e) {
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}
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}
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return controller || window.controllers.getControllerForCommand(command);
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},
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/**
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* Updates the state of a XUL <command> element for the specified command
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* depending on its state.
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* @param command
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* The name of the command to update the XUL <command> element for
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*/
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updateCommand: function(command) {
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var enabled = false;
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try {
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var controller = this._getControllerForCommand(command);
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if (controller) {
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enabled = controller.isCommandEnabled(command);
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}
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}
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catch(ex) { }
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this.enableCommand(command, enabled);
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},
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/**
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* Updates the state of a XUL <command> element for the specified command
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* depending on its state.
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* @param command
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* The name of the command to update the XUL <command> element for
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*/
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updateCommands: function(_commands) {
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var commands = _commands.split(",");
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for (var command in commands) {
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this.updateCommand(commands[command]);
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}
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},
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/**
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* Enables or disables a XUL <command> element.
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* @param command
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* The name of the command to enable or disable
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* @param enabled
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* true if the command should be enabled, false otherwise.
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*/
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enableCommand: function(command, enabled) {
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var element = document.getElementById(command);
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if (!element)
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return;
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if (enabled)
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element.removeAttribute("disabled");
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else
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element.setAttribute("disabled", "true");
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},
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/**
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* Performs the action associated with a specified command using the most
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* relevant controller.
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* @param command
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* The command to perform.
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*/
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doCommand: function(command) {
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var controller = this._getControllerForCommand(command);
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if (!controller)
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return;
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controller.doCommand(command);
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},
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/**
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* Changes the label attribute for the specified command.
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* @param command
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* The command to update.
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* @param labelAttribute
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* The label value to use.
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*/
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setMenuValue: function(command, labelAttribute) {
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var commandNode = top.document.getElementById(command);
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if (commandNode)
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{
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var label = commandNode.getAttribute(labelAttribute);
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if ( label )
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commandNode.setAttribute('label', label);
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}
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},
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/**
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* Changes the accesskey attribute for the specified command.
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* @param command
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* The command to update.
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* @param valueAttribute
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* The value attribute to use.
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*/
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setAccessKey: function(command, valueAttribute) {
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var commandNode = top.document.getElementById(command);
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if (commandNode)
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{
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var value = commandNode.getAttribute(valueAttribute);
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if ( value )
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commandNode.setAttribute('accesskey', value);
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}
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},
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/**
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* Inform all the controllers attached to a node that an event has occurred
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* (e.g. the tree controllers need to be informed of blur events so that they can change some of the
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* menu items back to their default values)
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* @param node
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* The node receiving the event
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* @param event
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* The event.
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*/
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onEvent: function(node, event) {
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var numControllers = node.controllers.getControllerCount();
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var controller;
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for ( var controllerIndex = 0; controllerIndex < numControllers; controllerIndex++ )
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{
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controller = node.controllers.getControllerAt(controllerIndex);
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if ( controller )
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controller.onEvent(event);
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}
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}
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};
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