// 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.
package org.apache.tapestry5.internal.services.javascript;
import org.apache.tapestry5.MarkupWriter;
import org.apache.tapestry5.dom.Element;
import org.apache.tapestry5.services.MarkupRenderer;
import org.apache.tapestry5.services.MarkupRendererFilter;
/**
* Responsible for adding additional style tags that contain directives for non-standards compatible browsers
*
* @since 5.4
*/
public class AddBrowserCompatibilityStyles implements MarkupRendererFilter
{
private final String ie9, ie8;
public AddBrowserCompatibilityStyles()
{
this(.25);
}
public AddBrowserCompatibilityStyles(double opacity)
{
// IE9 does not support CSS animations, so we make the loading mask translucent
ie9 = String.format("<!--[if IE 9]><style type=\"text/css\">.pageloading-mask{opacity:%.2f;}</style><![endif]-->", opacity);
// Older IE versions do not even support opacity, we'll have to resort to a filter
ie8 = String.format("<!--[if lt IE 9]><style type=\"text/css\">.pageloading-mask{filter:alpha(opacity=%d);}</style><![endif]-->",
(int) (100. * opacity));
}
public void renderMarkup(MarkupWriter writer, MarkupRenderer renderer)
{
renderer.renderMarkup(writer);
Element head = writer.getDocument().find("html/head");
// Only add the respective style documents if we've rendered an HTML document
if (head != null)
{
head.raw(ie9);
head.raw(ie8);
}
}
}