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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.MenuSeparator}s.
*
* @author attila@google.com (Attila Bodis)
*/
goog.provide('goog.ui.MenuSeparatorRenderer');
goog.require('goog.dom');
goog.require('goog.dom.classes');
goog.require('goog.ui.ControlContent');
goog.require('goog.ui.ControlRenderer');
/**
* Renderer for menu separators.
* @constructor
* @extends {goog.ui.ControlRenderer}
*/
goog.ui.MenuSeparatorRenderer = function() {
goog.ui.ControlRenderer.call(this);
};
goog.inherits(goog.ui.MenuSeparatorRenderer, goog.ui.ControlRenderer);
goog.addSingletonGetter(goog.ui.MenuSeparatorRenderer);
/**
* Default CSS class to be applied to the root element of components rendered
* by this renderer.
* @type {string}
*/
goog.ui.MenuSeparatorRenderer.CSS_CLASS = goog.getCssName('goog-menuseparator');
/**
* Returns an empty, styled menu separator DIV. Overrides {@link
* goog.ui.ControlRenderer#createDom}.
* @param {goog.ui.Control} separator goog.ui.Separator to render.
* @return {Element} Root element for the separator.
* @override
*/
goog.ui.MenuSeparatorRenderer.prototype.createDom = function(separator) {
return separator.getDomHelper().createDom('div', this.getCssClass());
};
/**
* Takes an existing element, and decorates it with the separator. Overrides
* {@link goog.ui.ControlRenderer#decorate}.
* @param {goog.ui.Control} separator goog.ui.MenuSeparator to decorate the
* element.
* @param {Element} element Element to decorate.
* @return {Element} Decorated element.
* @override
*/
goog.ui.MenuSeparatorRenderer.prototype.decorate = function(separator,
element) {
// Normally handled in the superclass. But we don't call the superclass.
if (element.id) {
separator.setId(element.id);
}
if (element.tagName == 'HR') {
// Replace HR with separator.
var hr = element;
element = this.createDom(separator);
goog.dom.insertSiblingBefore(element, hr);
goog.dom.removeNode(hr);
} else {
goog.dom.classes.add(element, this.getCssClass());
}
return element;
};
/**
* Overrides {@link goog.ui.ControlRenderer#setContent} to do nothing, since
* separators are empty.
* @param {Element} separator The separator's root element.
* @param {goog.ui.ControlContent} content Text caption or DOM structure to be
* set as the separators's content (ignored).
* @override
*/
goog.ui.MenuSeparatorRenderer.prototype.setContent = function(separator,
content) {
// Do nothing. Separators are empty.
};
/**
* 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.MenuSeparatorRenderer.prototype.getCssClass = function() {
return goog.ui.MenuSeparatorRenderer.CSS_CLASS;
};
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