Cut and Copy tags. Fixes #18

sitemesh · Nov 12, 2023 · 049c044 · 049c044
1 parent 4880bd2
commit 049c044
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Showing 4 changed files with 69 additions and 2 deletions.
diff --git a/examples/springboot/src/main/resources/static/decorators/default.html b/examples/springboot/src/main/resources/static/decorators/default.html
@@ -14,7 +14,7 @@ <h1 class="title"><a href="/" style="float:left;"><img height="40" src="/assets/
 
     <sitemesh:write property="body">Body goes here. Blah blah blah.</sitemesh:write>
 
-    <div class="disclaimer">Site disclaimer. This is an example.</div>
+    <div class="disclaimer">Site disclaimer. Hey <sitemesh:write property="sitemesh.name">you</sitemesh:write>, this is just an example.</div>
     <div class="navigation">
       <b>Examples:</b>
       [<a href="/">Static example</a>]
@@ -25,5 +25,6 @@ <h1 class="title"><a href="/" style="float:left;"><img height="40" src="/assets/
       [<a href="/greetingError">500 example</a>]
     </div>
 
+    <sitemesh:write property="sitemesh.jsSpecialGreeter"/>
   </body>
 </html>
diff --git a/examples/springboot/src/main/webapp/WEB-INF/jsp/greeting.jsp b/examples/springboot/src/main/webapp/WEB-INF/jsp/greeting.jsp
@@ -8,7 +8,7 @@
     </style>
 </head>
 <body>
-    <p>Hello, ${name}!</p>
+    <p>Hello, <sitemesh:copy id="name">${name}</sitemesh:copy>!</p>
 
     <p>This page demonstrates that dynamic content can be decorated in the same way as static content.</p>
     <p>This is a simple JSP that shows the date and time on the server is now:</p>
@@ -17,5 +17,18 @@
 
     <p>Of course, with SiteMesh you are not limited to JSP. Because it's a Servlet Filter, both content and decorators can be
         generated by any technology in your ServletEngine, including: <a href="/">static</a> files, <a href="/greeting">JSP</a>, Velocity, <a href="/greeting/ftl">FreeMarker</a>, <a href="/greeting/ttl">Thymeleaf</a>, JSF, MVC frameworks, JRuby.... you get the point.</p>
+
+    <form>
+        What is your name? <input type="text" name="name" />
+        <input type="submit" value="Go" />
+    </form>
+
+    <sitemesh:cut id="jsSpecialGreeter">
+        <script type="text/javascript">
+            if ('${name}'.toLowerCase() == "scott") {
+                alert("Now that's a cool name!!")
+            }
+        </script>
+    </sitemesh:cut>
 </body>
 </html>
diff --git a/sitemesh/src/main/java/org/sitemesh/content/tagrules/html/CoreHtmlTagRuleBundle.java b/sitemesh/src/main/java/org/sitemesh/content/tagrules/html/CoreHtmlTagRuleBundle.java
@@ -53,6 +53,8 @@ public void install(State defaultState, ContentProperty contentProperty, SiteMes
         defaultState.addRule("title", new ExportTagToContentRule(siteMeshContext, contentProperty.getChild("title"), false));
         defaultState.addRule("body", new ExportTagToContentAndMergeBodyAttributesRule(siteMeshContext, contentProperty.getChild("body"), false));
         defaultState.addRule("meta", new MetaTagRule(contentProperty.getChild("meta")));
+        defaultState.addRule("sitemesh:copy", new SiteMeshCutCopyRule(true, contentProperty));
+        defaultState.addRule("sitemesh:cut", new SiteMeshCutCopyRule(false, contentProperty));
 
         // Ensure that while in <xml> tag, none of the other rules kick in.
         // For example <xml><book><title>hello</title></book></xml> should not affect the title of the page.

diff --git a/sitemesh/src/main/java/org/sitemesh/content/tagrules/html/SiteMeshCutCopyRule.java b/sitemesh/src/main/java/org/sitemesh/content/tagrules/html/SiteMeshCutCopyRule.java
@@ -0,0 +1,51 @@
+/*
+ *    Copyright 2009-2023 SiteMesh authors.
+ *
+ *    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.sitemesh.content.tagrules.html;
+
+import org.sitemesh.content.ContentProperty;
+import org.sitemesh.tagprocessor.BasicBlockRule;
+import org.sitemesh.tagprocessor.Tag;
+
+import java.io.IOException;
+
+public class SiteMeshCutCopyRule extends BasicBlockRule<String> {
+
+    private final ContentProperty contentProperty;
+    private final boolean copy;
+
+    public SiteMeshCutCopyRule(boolean copy, ContentProperty contentProperty) {
+        this.copy = copy;
+        this.contentProperty = contentProperty.getChild("sitemesh");
+    }
+
+    @Override
+    protected String processStart(Tag tag) throws IOException {
+        tagProcessorContext.pushBuffer();
+        return tag.getAttributeValue("id", false);
+    }
+
+    @Override
+    protected void processEnd(Tag tag, String tagId) throws IOException {
+        CharSequence contents = tagProcessorContext.currentBufferContents();
+        contentProperty.getChild(tagId).setValue(contents);
+        tagProcessorContext.popBuffer();
+        if (copy) {
+            tagProcessorContext.currentBuffer().append(contents);
+        }
+    }
+
+}