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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 An example of how to write a dialog plugin.
*
*/
goog.provide('goog.demos.editor.HelloWorldDialogPlugin');
goog.provide('goog.demos.editor.HelloWorldDialogPlugin.Command');
goog.require('goog.demos.editor.HelloWorldDialog');
goog.require('goog.dom.TagName');
goog.require('goog.editor.plugins.AbstractDialogPlugin');
goog.require('goog.editor.range');
goog.require('goog.functions');
goog.require('goog.ui.editor.AbstractDialog.EventType');
// *** Public interface ***************************************************** //
/**
* A plugin that opens the hello world dialog.
* @constructor
* @extends {goog.editor.plugins.AbstractDialogPlugin}
*/
goog.demos.editor.HelloWorldDialogPlugin = function() {
goog.editor.plugins.AbstractDialogPlugin.call(this,
goog.demos.editor.HelloWorldDialogPlugin.Command.HELLO_WORLD_DIALOG);
};
goog.inherits(goog.demos.editor.HelloWorldDialogPlugin,
goog.editor.plugins.AbstractDialogPlugin);
/**
* Commands implemented by this plugin.
* @enum {string}
*/
goog.demos.editor.HelloWorldDialogPlugin.Command = {
HELLO_WORLD_DIALOG: 'helloWorldDialog'
};
/** @override */
goog.demos.editor.HelloWorldDialogPlugin.prototype.getTrogClassId =
goog.functions.constant('HelloWorldDialog');
// *** Protected interface ************************************************** //
/**
* Creates a new instance of the dialog and registers for the relevant events.
* @param {goog.dom.DomHelper} dialogDomHelper The dom helper to be used to
* create the dialog.
* @return {goog.demos.editor.HelloWorldDialog} The dialog.
* @override
* @protected
*/
goog.demos.editor.HelloWorldDialogPlugin.prototype.createDialog = function(
dialogDomHelper) {
var dialog = new goog.demos.editor.HelloWorldDialog(dialogDomHelper);
dialog.addEventListener(goog.ui.editor.AbstractDialog.EventType.OK,
this.handleOk_,
false,
this);
return dialog;
};
// *** Private implementation *********************************************** //
/**
* Handles the OK event from the dialog by inserting the hello world message
* into the field.
* @param {goog.demos.editor.HelloWorldDialog.OkEvent} e OK event object.
* @private
*/
goog.demos.editor.HelloWorldDialogPlugin.prototype.handleOk_ = function(e) {
// First restore the selection so we can manipulate the field's content
// according to what was selected.
this.restoreOriginalSelection();
// Notify listeners that the field's contents are about to change.
this.getFieldObject().dispatchBeforeChange();
// Now we can clear out what was previously selected (if anything).
var range = this.getFieldObject().getRange();
range.removeContents();
// And replace it with a span containing our hello world message.
var createdNode = this.getFieldDomHelper().createDom(goog.dom.TagName.SPAN,
null,
e.message);
createdNode = range.insertNode(createdNode, false);
// Place the cursor at the end of the new text node (false == to the right).
goog.editor.range.placeCursorNextTo(createdNode, false);
// Notify listeners that the field's selection has changed.
this.getFieldObject().dispatchSelectionChangeEvent();
// Notify listeners that the field's contents have changed.
this.getFieldObject().dispatchChange();
};
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