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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 Rounded corner tab renderer for {@link goog.ui.Tab}s.
*
* @author attila@google.com (Attila Bodis)
*/
goog.provide('goog.ui.RoundedTabRenderer');
goog.require('goog.dom');
goog.require('goog.dom.TagName');
goog.require('goog.ui.Tab');
goog.require('goog.ui.TabBar');
goog.require('goog.ui.TabRenderer');
goog.require('goog.ui.registry');
/**
* Rounded corner tab renderer for {@link goog.ui.Tab}s.
* @constructor
* @extends {goog.ui.TabRenderer}
* @final
*/
goog.ui.RoundedTabRenderer = function() {
goog.ui.TabRenderer.call(this);
};
goog.inherits(goog.ui.RoundedTabRenderer, goog.ui.TabRenderer);
goog.addSingletonGetter(goog.ui.RoundedTabRenderer);
/**
* Default CSS class to be applied to the root element of components rendered
* by this renderer.
* @type {string}
*/
goog.ui.RoundedTabRenderer.CSS_CLASS = goog.getCssName('goog-rounded-tab');
/**
* Returns the CSS class name to be applied to the root element of all tabs
* rendered or decorated using this renderer.
* @return {string} Renderer-specific CSS class name.
* @override
*/
goog.ui.RoundedTabRenderer.prototype.getCssClass = function() {
return goog.ui.RoundedTabRenderer.CSS_CLASS;
};
/**
* Creates the tab's DOM structure, based on the containing tab bar's location
* relative to tab contents. For example, the DOM for a tab in a tab bar
* located above tab contents would look like this:
*
* <div class="goog-rounded-tab" title="...">
* <table class="goog-rounded-tab-table">
* <tbody>
* <tr>
* <td nowrap>
* <div class="goog-rounded-tab-outer-edge"></div>
* <div class="goog-rounded-tab-inner-edge"></div>
* </td>
* </tr>
* <tr>
* <td nowrap>
* <div class="goog-rounded-tab-caption">Hello, world</div>
* </td>
* </tr>
* </tbody>
* </table>
* </div>
*
* @param {goog.ui.Control} tab Tab to render.
* @return {Element} Root element for the tab.
* @override
*/
goog.ui.RoundedTabRenderer.prototype.createDom = function(tab) {
return this.decorate(
tab, goog.ui.RoundedTabRenderer.superClass_.createDom.call(this, tab));
};
/**
* Decorates the element with the tab. Overrides the superclass implementation
* by wrapping the tab's content in a table that implements rounded corners.
* @param {goog.ui.Control} tab Tab to decorate the element.
* @param {Element} element Element to decorate.
* @return {Element} Decorated element.
* @override
*/
goog.ui.RoundedTabRenderer.prototype.decorate = function(tab, element) {
var tabBar = tab.getParent();
if (!this.getContentElement(element)) {
// The element to be decorated doesn't appear to have the full tab DOM,
// so we have to create it.
element.appendChild(
this.createTab(
tab.getDomHelper(), element.childNodes, tabBar.getLocation()));
}
return goog.ui.RoundedTabRenderer.superClass_.decorate.call(
this, tab, element);
};
/**
* Creates a table implementing a rounded corner tab.
* @param {goog.dom.DomHelper} dom DOM helper to use for element construction.
* @param {goog.ui.ControlContent} caption Text caption or DOM structure
* to display as the tab's caption.
* @param {goog.ui.TabBar.Location} location Tab bar location relative to the
* tab contents.
* @return {!Element} Table implementing a rounded corner tab.
* @protected
*/
goog.ui.RoundedTabRenderer.prototype.createTab = function(
dom, caption, location) {
var rows = [];
if (location != goog.ui.TabBar.Location.BOTTOM) {
// This is a left, right, or top tab, so it needs a rounded top edge.
rows.push(this.createEdge(dom, /* isTopEdge */ true));
}
rows.push(this.createCaption(dom, caption));
if (location != goog.ui.TabBar.Location.TOP) {
// This is a left, right, or bottom tab, so it needs a rounded bottom edge.
rows.push(this.createEdge(dom, /* isTopEdge */ false));
}
return dom.createDom(
goog.dom.TagName.TABLE, {
'cellPadding': 0,
'cellSpacing': 0,
'className': goog.getCssName(this.getStructuralCssClass(), 'table')
},
dom.createDom(goog.dom.TagName.TBODY, null, rows));
};
/**
* Creates a table row implementing the tab caption.
* @param {goog.dom.DomHelper} dom DOM helper to use for element construction.
* @param {goog.ui.ControlContent} caption Text caption or DOM structure
* to display as the tab's caption.
* @return {!Element} Tab caption table row.
* @protected
*/
goog.ui.RoundedTabRenderer.prototype.createCaption = function(dom, caption) {
var baseClass = this.getStructuralCssClass();
return dom.createDom(
goog.dom.TagName.TR, null,
dom.createDom(
goog.dom.TagName.TD, {'noWrap': true},
dom.createDom(
goog.dom.TagName.DIV, goog.getCssName(baseClass, 'caption'),
caption)));
};
/**
* Creates a table row implementing a rounded tab edge.
* @param {goog.dom.DomHelper} dom DOM helper to use for element construction.
* @param {boolean} isTopEdge Whether to create a top or bottom edge.
* @return {!Element} Rounded tab edge table row.
* @protected
*/
goog.ui.RoundedTabRenderer.prototype.createEdge = function(dom, isTopEdge) {
var baseClass = this.getStructuralCssClass();
var inner = dom.createDom(
goog.dom.TagName.DIV, goog.getCssName(baseClass, 'inner-edge'));
var outer = dom.createDom(
goog.dom.TagName.DIV, goog.getCssName(baseClass, 'outer-edge'));
return dom.createDom(
goog.dom.TagName.TR, null,
dom.createDom(
goog.dom.TagName.TD, {'noWrap': true},
isTopEdge ? [outer, inner] : [inner, outer]));
};
/** @override */
goog.ui.RoundedTabRenderer.prototype.getContentElement = function(element) {
var baseClass = this.getStructuralCssClass();
return element &&
goog.dom.getElementsByTagNameAndClass(
goog.dom.TagName.DIV, goog.getCssName(baseClass, 'caption'),
element)[0];
};
// Register a decorator factory function for goog.ui.Tabs using the rounded
// tab renderer.
goog.ui.registry.setDecoratorByClassName(
goog.ui.RoundedTabRenderer.CSS_CLASS, function() {
return new goog.ui.Tab(null, goog.ui.RoundedTabRenderer.getInstance());
});
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