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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 Renderer for {@link goog.ui.MenuButton}s and subclasses.
*
* @author attila@google.com (Attila Bodis)
*/
goog.provide('goog.ui.MenuButtonRenderer');
goog.require('goog.dom');
goog.require('goog.style');
goog.require('goog.ui.CustomButtonRenderer');
goog.require('goog.ui.INLINE_BLOCK_CLASSNAME');
goog.require('goog.ui.Menu');
goog.require('goog.ui.MenuRenderer');
goog.require('goog.userAgent');
/**
* Renderer for {@link goog.ui.MenuButton}s. This implementation overrides
* {@link goog.ui.CustomButtonRenderer#createButton} to create a separate
* caption and dropdown element.
* @constructor
* @extends {goog.ui.CustomButtonRenderer}
*/
goog.ui.MenuButtonRenderer = function() {
goog.ui.CustomButtonRenderer.call(this);
};
goog.inherits(goog.ui.MenuButtonRenderer, goog.ui.CustomButtonRenderer);
goog.addSingletonGetter(goog.ui.MenuButtonRenderer);
/**
* Default CSS class to be applied to the root element of components rendered
* by this renderer.
* @type {string}
*/
goog.ui.MenuButtonRenderer.CSS_CLASS = goog.getCssName('goog-menu-button');
/**
* A property to denote content elements that have been wrapped in an extra
* div to work around FF2/RTL bugs.
* @type {string}
* @private
*/
goog.ui.MenuButtonRenderer.WRAPPER_PROP_ = '__goog_wrapper_div';
if (goog.userAgent.GECKO) {
/**
* Takes the menubutton's root element, and sets its content to the given
* text caption or DOM structure. Because the DOM structure of this button is
* conditional based on whether we need to work around FF2/RTL bugs, we
* override the default implementation to take this into account.
* @param {Element} element The control's root element.
* @param {goog.ui.ControlContent} content Text caption or DOM
* structure to be set as the control's content.
* @override
*/
goog.ui.MenuButtonRenderer.prototype.setContent = function(element,
content) {
var caption =
goog.ui.MenuButtonRenderer.superClass_.getContentElement.call(this,
/** @type {Element} */ (element && element.firstChild));
if (caption) {
goog.dom.replaceNode(
this.createCaption(content, goog.dom.getDomHelper(element)),
caption);
}
};
} // end goog.userAgent.GECKO
/**
* Takes the button's root element and returns the parent element of the
* button's contents. Overrides the superclass implementation by taking
* the nested DIV structure of menu buttons into account.
* @param {Element} element Root element of the button whose content element
* is to be returned.
* @return {Element} The button's content element.
* @override
*/
goog.ui.MenuButtonRenderer.prototype.getContentElement = function(element) {
var content =
goog.ui.MenuButtonRenderer.superClass_.getContentElement.call(this,
/** @type {Element} */ (element && element.firstChild));
if (goog.userAgent.GECKO && content &&
content[goog.ui.MenuButtonRenderer.WRAPPER_PROP_]) {
content = /** @type {Element} */ (content.firstChild);
}
return content;
};
/**
* Takes an element, decorates it with the menu button control, and returns
* the element. Overrides {@link goog.ui.CustomButtonRenderer#decorate} by
* looking for a child element that can be decorated by a menu, and if it
* finds one, decorates it and attaches it to the menu button.
* @param {goog.ui.Control} control goog.ui.MenuButton to decorate the element.
* @param {Element} element Element to decorate.
* @return {Element} Decorated element.
* @override
*/
goog.ui.MenuButtonRenderer.prototype.decorate = function(control, element) {
var button = /** @type {goog.ui.MenuButton} */ (control);
// TODO(attila): Add more robust support for subclasses of goog.ui.Menu.
var menuElem = goog.dom.getElementsByTagNameAndClass(
'*', goog.ui.MenuRenderer.CSS_CLASS, element)[0];
if (menuElem) {
// Move the menu element directly under the body (but hide it first to
// prevent flicker; see bug 1089244).
goog.style.showElement(menuElem, false);
goog.dom.appendChild(goog.dom.getOwnerDocument(menuElem).body, menuElem);
// Decorate the menu and attach it to the button.
var menu = new goog.ui.Menu();
menu.decorate(menuElem);
button.setMenu(menu);
}
// Let the superclass do the rest.
return goog.ui.MenuButtonRenderer.superClass_.decorate.call(this, button,
element);
};
/**
* Takes a text caption or existing DOM structure, and returns the content and
* a dropdown arrow element wrapped in a pseudo-rounded-corner box. Creates
* the following DOM structure:
* <div class="goog-inline-block goog-menu-button-outer-box">
* <div class="goog-inline-block goog-menu-button-inner-box">
* <div class="goog-inline-block goog-menu-button-caption">
* Contents...
* </div>
* <div class="goog-inline-block goog-menu-button-dropdown">
*
* </div>
* </div>
* </div>
* @param {goog.ui.ControlContent} content Text caption or DOM structure
* to wrap in a box.
* @param {goog.dom.DomHelper} dom DOM helper, used for document interaction.
* @return {Element} Pseudo-rounded-corner box containing the content.
* @override
*/
goog.ui.MenuButtonRenderer.prototype.createButton = function(content, dom) {
return goog.ui.MenuButtonRenderer.superClass_.createButton.call(this,
[this.createCaption(content, dom), this.createDropdown(dom)], dom);
};
/**
* Takes a text caption or existing DOM structure, and returns it wrapped in
* an appropriately-styled DIV. Creates the following DOM structure:
* <div class="goog-inline-block goog-menu-button-caption">
* Contents...
* </div>
* @param {goog.ui.ControlContent} content Text caption or DOM structure
* to wrap in a box.
* @param {goog.dom.DomHelper} dom DOM helper, used for document interaction.
* @return {Element} Caption element.
*/
goog.ui.MenuButtonRenderer.prototype.createCaption = function(content, dom) {
return goog.ui.MenuButtonRenderer.wrapCaption(
content, this.getCssClass(), dom);
};
/**
* Takes a text caption or existing DOM structure, and returns it wrapped in
* an appropriately-styled DIV. Creates the following DOM structure:
* <div class="goog-inline-block goog-menu-button-caption">
* Contents...
* </div>
* @param {goog.ui.ControlContent} content Text caption or DOM structure
* to wrap in a box.
* @param {string} cssClass The CSS class for the renderer.
* @param {goog.dom.DomHelper} dom DOM helper, used for document interaction.
* @return {Element} Caption element.
*/
goog.ui.MenuButtonRenderer.wrapCaption = function(content, cssClass, dom) {
return dom.createDom(
'div',
goog.ui.INLINE_BLOCK_CLASSNAME + ' ' +
goog.getCssName(cssClass, 'caption'),
content);
};
/**
* Returns an appropriately-styled DIV containing a dropdown arrow element.
* Creates the following DOM structure:
* <div class="goog-inline-block goog-menu-button-dropdown">
*
* </div>
* @param {goog.dom.DomHelper} dom DOM helper, used for document interaction.
* @return {Element} Dropdown element.
*/
goog.ui.MenuButtonRenderer.prototype.createDropdown = function(dom) {
// 00A0 is
return dom.createDom('div',
goog.ui.INLINE_BLOCK_CLASSNAME + ' ' +
goog.getCssName(this.getCssClass(), 'dropdown'), '\u00A0');
};
/**
* Returns the CSS class to be applied to the root element of components
* rendered using this renderer.
* @return {string} Renderer-specific CSS class.
* @override
*/
goog.ui.MenuButtonRenderer.prototype.getCssClass = function() {
return goog.ui.MenuButtonRenderer.CSS_CLASS;
};
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