01: // Copyright 2006, 2007 The Apache Software Foundation
02: //
03: // Licensed under the Apache License, Version 2.0 (the "License");
04: // you may not use this file except in compliance with the License.
05: // You may obtain a copy of the License at
06: //
07: // http://www.apache.org/licenses/LICENSE-2.0
08: //
09: // Unless required by applicable law or agreed to in writing, software
10: // distributed under the License is distributed on an "AS IS" BASIS,
11: // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12: // See the License for the specific language governing permissions and
13: // limitations under the License.
14:
15: package org.apache.tapestry.internal.services;
16:
17: import org.apache.tapestry.Asset;
18: import org.apache.tapestry.dom.Document;
19: import org.apache.tapestry.dom.Element;
20: import org.apache.tapestry.services.Environment;
21: import org.apache.tapestry.services.PageRenderCommand;
22:
23: /**
24: * Checks to see if the output document has a <html>/<head> element and, if so, adds the
25: * default Tapestry stylesheet to the start.
26: */
27: public class InjectStandardStylesheetCommand implements
28: PageRenderCommand {
29: private final Asset _stylesheetAsset;
30:
31: public InjectStandardStylesheetCommand(Asset stylesheetAsset) {
32: _stylesheetAsset = stylesheetAsset;
33: }
34:
35: public void setup(Environment environment) {
36: }
37:
38: public void cleanup(Environment environment) {
39: Document document = environment.peek(Document.class);
40:
41: Element head = document.find("html/head");
42:
43: if (head == null)
44: return;
45:
46: head.elementAt(0, "link", "rel", "stylesheet", "type",
47: "text/css", "href", _stylesheetAsset.toClientURL());
48: }
49: }
|