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1
16 package org.apache.myfaces.custom.layout;
17
18 import org.apache.myfaces.renderkit.RendererUtils;
19 import org.apache.myfaces.renderkit.html.HTML;
20 import org.apache.myfaces.renderkit.html.HtmlRenderer;
21 import org.apache.myfaces.renderkit.html.HtmlRendererUtils;
22
23 import org.apache.commons.logging.Log;
24 import org.apache.commons.logging.LogFactory;
25
26 import javax.faces.component.UIComponent;
27 import javax.faces.context.FacesContext;
28 import javax.faces.context.ResponseWriter;
29 import java.io.IOException  ;
30
31
35 public class HtmlLayoutRenderer
36 extends HtmlRenderer
37 {
38 private static final Log log = LogFactory.getLog(HtmlLayoutRenderer.class);
39
40 public static final String CLASSIC_LAYOUT = "classic";
41 public static final String NAV_RIGHT_LAYOUT = "navigationRight";
42 public static final String UPSIDE_DOWN_LAYOUT = "upsideDown";
43
44 public boolean getRendersChildren()
45 {
46 return true;
47 }
48
49 public void encodeBegin(FacesContext context, UIComponent component) throws IOException
50 {
51 }
52
53 public void encodeChildren(FacesContext context, UIComponent component) throws IOException
54 {
55 }
56
57 public void encodeEnd(FacesContext facesContext, UIComponent component) throws IOException
58 {
59 RendererUtils.checkParamValidity(facesContext, component, HtmlPanelLayout.class);
60
61 HtmlPanelLayout panelLayout = (HtmlPanelLayout)component;
62
63 String layout = panelLayout.getLayout();
64 if (layout == null || layout.equals(CLASSIC_LAYOUT))
65 {
66 renderClassic(facesContext, panelLayout);
67 }
68 else if (layout.equals(NAV_RIGHT_LAYOUT))
69 {
70 renderNavRight(facesContext, panelLayout);
71 }
72 else if (layout.equals(UPSIDE_DOWN_LAYOUT))
73 {
74 renderUpsideDown(facesContext, panelLayout);
75 }
76 else
77 {
78 log.error("Unknown panel layout '" + layout + "'!");
79 }
80
81 if (panelLayout.getChildCount() > 0)
82 {
83 log.error("PanelLayout must not have children, only facets allowed!");
84 }
85 }
86
87 protected void renderClassic(FacesContext facesContext, HtmlPanelLayout panelLayout)
88 throws IOException
89 {
90 ResponseWriter writer = facesContext.getResponseWriter();
91 UIComponent header = panelLayout.getHeader();
92 UIComponent navigation = panelLayout.getNavigation();
93 UIComponent body = panelLayout.getBody();
94 UIComponent footer = panelLayout.getFooter();
95
96 writer.startElement(HTML.TABLE_ELEM, null);
97 HtmlRendererUtils.renderHTMLAttributes(writer, panelLayout, HTML.TABLE_PASSTHROUGH_ATTRIBUTES);
98 if (header != null)
99 {
100 writer.startElement(HTML.TR_ELEM, null);
101 renderTableCell(facesContext, writer, header,
102 (navigation != null && body != null) ? 2 : 1,
103 panelLayout.getHeaderClass(),
104 panelLayout.getHeaderStyle());
105 writer.endElement(HTML.TR_ELEM);
106 }
107 if (navigation != null || body != null)
108 {
109 writer.startElement(HTML.TR_ELEM, null);
110 if (navigation != null)
111 {
112 renderTableCell(facesContext, writer, navigation, 0,
113 panelLayout.getNavigationClass(),
114 panelLayout.getNavigationStyle());
115 }
116 if (body != null)
117 {
118 renderTableCell(facesContext, writer, body, 0,
119 panelLayout.getBodyClass(),
120 panelLayout.getBodyStyle());
121 }
122 writer.endElement(HTML.TR_ELEM);
123 }
124 if (footer != null)
125 {
126 writer.startElement(HTML.TR_ELEM, null);
127 renderTableCell(facesContext, writer, footer,
128 (navigation != null && body != null) ? 2 : 1,
129 panelLayout.getFooterClass(),
130 panelLayout.getFooterStyle());
131 writer.endElement(HTML.TR_ELEM);
132 }
133 writer.endElement(HTML.TABLE_ELEM);
134 }
135
136
137 protected void renderNavRight(FacesContext facesContext, HtmlPanelLayout panelLayout)
138 throws IOException
139 {
140 ResponseWriter writer = facesContext.getResponseWriter();
141 UIComponent header = panelLayout.getHeader();
142 UIComponent navigation = panelLayout.getNavigation();
143 UIComponent body = panelLayout.getBody();
144 UIComponent footer = panelLayout.getFooter();
145
146 writer.startElement(HTML.TABLE_ELEM, null);
147 HtmlRendererUtils.renderHTMLAttributes(writer, panelLayout, HTML.TABLE_PASSTHROUGH_ATTRIBUTES);
148 if (header != null)
149 {
150 writer.startElement(HTML.TR_ELEM, null);
151 renderTableCell(facesContext, writer, header,
152 (navigation != null && body != null) ? 2 : 1,
153 panelLayout.getHeaderClass(),
154 panelLayout.getHeaderStyle());
155 writer.endElement(HTML.TR_ELEM);
156 }
157 if (navigation != null || body != null)
158 {
159 writer.startElement(HTML.TR_ELEM, null);
160 if (body != null)
161 {
162 renderTableCell(facesContext, writer, body, 0,
163 panelLayout.getBodyClass(),
164 panelLayout.getBodyStyle());
165 }
166 if (navigation != null)
167 {
168 renderTableCell(facesContext, writer, navigation, 0,
169 panelLayout.getNavigationClass(),
170 panelLayout.getNavigationStyle());
171 }
172 writer.endElement(HTML.TR_ELEM);
173 }
174 if (footer != null)
175 {
176 writer.startElement(HTML.TR_ELEM, null);
177 renderTableCell(facesContext, writer, footer,
178 (navigation != null && body != null) ? 2 : 1,
179 panelLayout.getFooterClass(),
180 panelLayout.getFooterStyle());
181 writer.endElement(HTML.TR_ELEM);
182 }
183 writer.endElement(HTML.TABLE_ELEM);
184 }
185
186
187 protected void renderUpsideDown(FacesContext facesContext, HtmlPanelLayout panelLayout)
188 throws IOException
189 {
190 ResponseWriter writer = facesContext.getResponseWriter();
191 UIComponent header = panelLayout.getHeader();
192 UIComponent navigation = panelLayout.getNavigation();
193 UIComponent body = panelLayout.getBody();
194 UIComponent footer = panelLayout.getFooter();
195
196 writer.startElement(HTML.TABLE_ELEM, null);
197 HtmlRendererUtils.renderHTMLAttributes(writer, panelLayout, HTML.TABLE_PASSTHROUGH_ATTRIBUTES);
198 if (footer != null)
199 {
200 writer.startElement(HTML.TR_ELEM, null);
201 renderTableCell(facesContext, writer, footer,
202 (navigation != null && body != null) ? 2 : 1,
203 panelLayout.getFooterClass(),
204 panelLayout.getFooterStyle());
205 writer.endElement(HTML.TR_ELEM);
206 }
207 if (navigation != null || body != null)
208 {
209 writer.startElement(HTML.TR_ELEM, null);
210 if (navigation != null)
211 {
212 renderTableCell(facesContext, writer, navigation, 0,
213 panelLayout.getNavigationClass(),
214 panelLayout.getNavigationStyle());
215 }
216 if (body != null)
217 {
218 renderTableCell(facesContext, writer, body, 0,
219 panelLayout.getBodyClass(),
220 panelLayout.getBodyStyle());
221 }
222 writer.endElement(HTML.TR_ELEM);
223 }
224 if (header != null)
225 {
226 writer.startElement(HTML.TR_ELEM, null);
227 renderTableCell(facesContext, writer, header,
228 (navigation != null && body != null) ? 2 : 1,
229 panelLayout.getHeaderClass(),
230 panelLayout.getHeaderStyle());
231 writer.endElement(HTML.TR_ELEM);
232 }
233 writer.endElement(HTML.TABLE_ELEM);
234 }
235
236
237 protected void renderTableCell(FacesContext facesContext,
238 ResponseWriter writer,
239 UIComponent component,
240 int colspan,
241 String styleClass,
242 String style)
243 throws IOException
244 {
245 writer.startElement(HTML.TD_ELEM, null);
246 if (colspan > 0)
247 {
248 writer.writeAttribute(HTML.COLSPAN_ATTR, Integer.toString(colspan), null);
249 }
250 if (styleClass != null)
251 {
252 writer.writeAttribute(HTML.CLASS_ATTR, styleClass, null);
253 }
254 if (style != null)
255 {
256 writer.writeAttribute(HTML.STYLE_ATTR, style, null);
257 }
258
259 RendererUtils.renderChild(facesContext, component);
260
261 writer.endElement(HTML.TD_ELEM);
262 }
263
264 }
265 |
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