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1
9
10 package org.jboss.portal.core.theme.tag;
11
12 import org.apache.log4j.Logger;
13 import org.jboss.portal.common.MediaType;
14 import org.jboss.portal.core.theme.render.RendererFactory;
15 import org.jboss.portal.server.LayoutServer;
16 import org.jboss.portal.server.theme.LayoutConstants;
17 import org.jboss.portal.server.theme.PageHolder;
18 import org.jboss.portal.server.theme.PortalLayout;
19 import org.jboss.portal.server.theme.PortalRenderSet;
20 import org.jboss.portal.server.theme.Region;
21 import org.jboss.portal.server.theme.RegionOrientation;
22 import org.jboss.portal.server.theme.RegionSet;
23 import org.jboss.portal.server.theme.render.RenderContext;
24 import org.jboss.portal.server.theme.render.RenderException;
25
26 import javax.activation.MimeTypeParseException  ;
27 import javax.servlet.http.HttpServletRequest ;
28 import javax.servlet.http.HttpServletResponse ;
29 import javax.servlet.jsp.JspException ;
30 import javax.servlet.jsp.JspWriter ;
31 import javax.servlet.jsp.PageContext ;
32 import javax.servlet.jsp.tagext.SimpleTagSupport ;
33 import java.io.IOException ;
34 import java.util.Iterator ;
35
36
47 public class RegionTagHandler
48 extends SimpleTagSupport
49 {
50 private static Logger log = Logger.getLogger(RegionTagHandler.class);
51 private RegionOrientation orientation = RegionOrientation.VERTICAL;
53 private String regionName = null;
54
55
61 public void doTag() throws JspException , IOException
62 {
63 log.debug("rendering " + regionName + " [" + orientation + "]");
64
65 PageContext app = (PageContext )getJspContext();
67 HttpServletRequest request = (HttpServletRequest )app.getRequest();
68 HttpServletResponse response = (HttpServletResponse )app.getResponse();
69
70 PageHolder requestedPage = (PageHolder)request.getAttribute(LayoutConstants.ATTR_PAGE);
71 JspWriter out = this.getJspContext().getOut();
72 if (requestedPage == null)
73 {
74 out.write("<p bgcolor='red'>No page to render!</p>");
75 out.write("<p bgcolor='red'>The page to render (PageHolder) must be set in the request attribute '" +
76 LayoutConstants.ATTR_PAGE + "'</p>");
77 out.flush();
78 return;
79 }
80
81 RegionSet regions = requestedPage.getRegions();
82
83 Region region = null;
84
85 if (regionName != null)
86 {
87 if (regions.getRegion(regionName) == null)
88 {
89 log.warn("requested page has no region [" + regionName + "]");
90 return;
91 }
92 }
93
94 try
96 {
97 LayoutServer layoutServer = (LayoutServer)request.getAttribute(LayoutConstants.ATTR_LAYOUTSERVER);
98 if (layoutServer == null)
99 {
100 log.error("no layout server provided in this request");
101 throw new JspException ("no layout server provided in this request");
102 }
103
104 MediaType mediaType = getMediaTypeFromResponse(response);
106
107 PortalLayout layout = (PortalLayout)request.getAttribute(LayoutConstants.PARAM_LAYOUT);
109 PortalRenderSet renderSet = layoutServer.getRenderSet(layout, mediaType);
110 String renderSetName = (String )request.getAttribute(LayoutConstants.ATTR_RENDERSET);
111
112 if (renderSet == null && renderSetName != null)
113 {
114 renderSet = layoutServer.getRenderSet(renderSetName, mediaType);
115 }
116
117 if (renderSet == null)
118 {
119 log.error("render set cannot be determined : " + renderSetName);
120 throw new JspException ("render set cannot be determined : " + renderSetName);
121 }
122
123 if (regionName != null)
125 {
126 if (regions.getRegion(regionName) != null)
127 {
128 region = regions.getRegion(regionName);
129 renderRegion(renderSet, mediaType, request, region, out);
130 }
131 }
132 else
133 {
134 for (Iterator i = regions.getRegionNames().iterator(); i.hasNext();)
140 {
141 region = regions.getRegion((String )i.next());
142 renderRegion(renderSet, mediaType, request, region, out);
143 }
144 }
145
146 }
147 catch (RenderException e)
148 {
149 log.error(e);
150 out.write("<p>" + e.getMessage() + "</p>");
151 out.flush();
152 }
153
154 log.debug("done rendering page region [" + regionName + "]");
155 }
156
157 private void renderRegion(PortalRenderSet renderSet, MediaType mediaType, HttpServletRequest request, Region region, JspWriter out)
158 throws RenderException, IOException
159 {
160 RenderContext renderContext =
161 RendererFactory.getRenderContext(renderSet, mediaType, orientation, request);
162
163 renderSet.getRegionRenderer().render(renderContext, region);
164 out.write(renderContext.getMarkupFragment().toString());
165 out.flush();
166 }
167
168 private static MediaType getMediaTypeFromResponse(HttpServletResponse response)
169 {
170 MediaType contentType = MediaType.HTML;
171 if (response.getContentType() != null)
172 {
173 try
174 {
175 contentType = MediaType.parseMimeType(response.getContentType());
176 }
177 catch (MimeTypeParseException e)
178 {
179 log.error(e);
180 }
181 }
182 return contentType;
183 }
184
185
186
188
193 public void setOrientation(String orientation)
194 {
195 if (orientation == null)
196 {
197 log.error("no null value allowed");
198 }
199
200 try
201 {
202 this.orientation = RegionOrientation.parseOrientation(orientation);
203 }
204 catch (IllegalArgumentException e)
205 {
206 log.error(e);
207 }
208 }
209
210
215 public void setRegionName(String regionName)
216 {
217 this.regionName = regionName;
218 }
219 }
220 |
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