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// Copyright 2008 The Closure Library Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS-IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/**
* @fileoverview Abstract Editor plugin class to handle tab keys. Has one
* abstract method which should be overriden to handle a tab key press.
*
* @author robbyw@google.com (Robby Walker)
*/
goog.provide('goog.editor.plugins.AbstractTabHandler');
goog.require('goog.editor.Plugin');
goog.require('goog.events.KeyCodes');
goog.require('goog.userAgent');
/**
* Plugin to handle tab keys. Specific tab behavior defined by subclasses.
*
* @constructor
* @extends {goog.editor.Plugin}
*/
goog.editor.plugins.AbstractTabHandler = function() {
goog.editor.Plugin.call(this);
};
goog.inherits(goog.editor.plugins.AbstractTabHandler, goog.editor.Plugin);
/** @override */
goog.editor.plugins.AbstractTabHandler.prototype.getTrogClassId =
goog.abstractMethod;
/** @override */
goog.editor.plugins.AbstractTabHandler.prototype.handleKeyboardShortcut =
function(e, key, isModifierPressed) {
// If a dialog doesn't have selectable field, Moz grabs the event and
// performs actions in editor window. This solves that problem and allows
// the event to be passed on to proper handlers.
if (goog.userAgent.GECKO && this.getFieldObject().inModalMode()) {
return false;
}
// Don't handle Ctrl+Tab since the user is most likely trying to switch
// browser tabs. See bug 1305086.
// FF3 on Mac sends Ctrl-Tab to trogedit and we end up inserting a tab, but
// then it also switches the tabs. See bug 1511681. Note that we don't use
// isModifierPressed here since isModifierPressed is true only if metaKey
// is true on Mac.
if (e.keyCode == goog.events.KeyCodes.TAB && !e.metaKey && !e.ctrlKey) {
return this.handleTabKey(e);
}
return false;
};
/**
* Handle a tab key press.
* @param {goog.events.Event} e The key event.
* @return {boolean} Whether this event was handled by this plugin.
* @protected
*/
goog.editor.plugins.AbstractTabHandler.prototype.handleTabKey =
goog.abstractMethod;
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