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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
cr.define('cr.ui', function() {
const Command = cr.ui.Command;
/**
* Creates a new menu item element.
* @param {Object=} opt_propertyBag Optional properties.
* @constructor
* @extends {HTMLDivElement}
*/
var MenuItem = cr.ui.define('div');
/**
* Creates a new menu separator element.
* @return {cr.ui.MenuItem}
*/
MenuItem.createSeparator = function() {
var el = cr.doc.createElement('hr');
MenuItem.decorate(el);
return el;
};
MenuItem.prototype = {
__proto__: HTMLButtonElement.prototype,
/**
* Initializes the menu item.
*/
decorate: function() {
var commandId;
if ((commandId = this.getAttribute('command')))
this.command = commandId;
this.addEventListener('mouseup', this.handleMouseUp_);
// Adding the 'custom-appearance' class prevents widgets.css from changing
// the appearance of this element.
this.classList.add('custom-appearance');
},
/**
* The command associated with this menu item. If this is set to a string
* of the form "#element-id" then the element is looked up in the document
* of the command.
* @type {cr.ui.Command}
*/
command_: null,
get command() {
return this.command_;
},
set command(command) {
if (this.command_) {
this.command_.removeEventListener('labelChange', this);
this.command_.removeEventListener('disabledChange', this);
this.command_.removeEventListener('hiddenChange', this);
this.command_.removeEventListener('checkedChange', this);
}
if (typeof command == 'string' && command[0] == '#') {
command = this.ownerDocument.getElementById(command.slice(1));
cr.ui.decorate(command, Command);
}
this.command_ = command;
if (command) {
if (command.id)
this.setAttribute('command', '#' + command.id);
this.label = command.label;
this.disabled = command.disabled;
this.hidden = command.hidden;
this.command_.addEventListener('labelChange', this);
this.command_.addEventListener('disabledChange', this);
this.command_.addEventListener('hiddenChange', this);
this.command_.addEventListener('checkedChange', this);
}
},
/**
* The text label.
* @type {string}
*/
get label() {
return this.textContent;
},
set label(label) {
this.textContent = label;
},
/**
* @return {boolean} Whether the menu item is a separator.
*/
isSeparator: function() {
return this.tagName == 'HR';
},
/**
* Handles mouseup events. This dispatches an active event and if there
* is an assiciated command then that is executed.
* @param {Event} The mouseup event object.
* @private
*/
handleMouseUp_: function(e) {
if (!this.disabled && !this.isSeparator() && this.selected) {
// Dispatch command event followed by executing the command object.
if (cr.dispatchSimpleEvent(this, 'activate', true, true)) {
var command = this.command;
if (command)
command.execute();
}
}
},
/**
* Handles changes to the associated command.
* @param {Event} e The event object.
*/
handleEvent: function(e) {
switch (e.type) {
case 'disabledChange':
this.disabled = this.command.disabled;
break;
case 'hiddenChange':
this.hidden = this.command.hidden;
break;
case 'labelChange':
this.label = this.command.label;
break;
case 'checkedChange':
this.checked = this.command.checked;
break;
}
}
};
/**
* Whether the menu item is disabled or not.
* @type {boolean}
*/
cr.defineProperty(MenuItem, 'disabled', cr.PropertyKind.BOOL_ATTR);
/**
* Whether the menu item is hidden or not.
* @type {boolean}
*/
cr.defineProperty(MenuItem, 'hidden', cr.PropertyKind.BOOL_ATTR);
/**
* Whether the menu item is selected or not.
* @type {boolean}
*/
cr.defineProperty(MenuItem, 'selected', cr.PropertyKind.BOOL_ATTR);
/**
* Whether the menu item is checked or not.
* @type {boolean}
*/
cr.defineProperty(MenuItem, 'checked', cr.PropertyKind.BOOL_ATTR);
// Export
return {
MenuItem: MenuItem
};
});
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