From f8e52c2a9c6f35698eb6feb292290ea7c316f5e5 Mon Sep 17 00:00:00 2001
From: Erik Brakkee <erik@brakkee.org>
Date: Sat, 28 Aug 2010 19:00:52 +0000
Subject: [PATCH]

---
 .../wicket/behavior/NamespaceBehavior.java    | 39 ++++++++++
 .../wicket/behavior/PreselectionBehavior.java | 75 +++++++++++++++++++
 2 files changed, 114 insertions(+)
 create mode 100644 wicket/components/src/main/java/org/wamblee/wicket/behavior/NamespaceBehavior.java
 create mode 100644 wicket/components/src/main/java/org/wamblee/wicket/behavior/PreselectionBehavior.java

diff --git a/wicket/components/src/main/java/org/wamblee/wicket/behavior/NamespaceBehavior.java b/wicket/components/src/main/java/org/wamblee/wicket/behavior/NamespaceBehavior.java
new file mode 100644
index 00000000..b7c252e8
--- /dev/null
+++ b/wicket/components/src/main/java/org/wamblee/wicket/behavior/NamespaceBehavior.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2005-2010 the original author or 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.wamblee.wicket.behavior;
+
+import org.apache.wicket.behavior.HeaderContributor;
+import org.apache.wicket.markup.html.JavascriptPackageResource;
+
+/**
+ * Behavior that adds the org.wamblee namespace to the javascript environment. 
+ * 
+ * @author Erik Brakkee
+ */
+class NamespaceBehavior extends HeaderContributor {
+    
+    static final String NAMESPACE_SCRIPT = "wamblee-namespace.js";
+
+    private static HeaderContributor CACHE = JavascriptPackageResource.getHeaderContribution(
+        NamespaceBehavior.class, NAMESPACE_SCRIPT);
+
+    /**
+     * Constructs the namespace.
+     */
+    public NamespaceBehavior() {
+        super(CACHE);
+    }
+}
diff --git a/wicket/components/src/main/java/org/wamblee/wicket/behavior/PreselectionBehavior.java b/wicket/components/src/main/java/org/wamblee/wicket/behavior/PreselectionBehavior.java
new file mode 100644
index 00000000..0ea11828
--- /dev/null
+++ b/wicket/components/src/main/java/org/wamblee/wicket/behavior/PreselectionBehavior.java
@@ -0,0 +1,75 @@
+/*
+ * Copyright 2005-2010 the original author or 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.wamblee.wicket.behavior;
+
+import org.apache.wicket.Component;
+import org.apache.wicket.Page;
+import org.apache.wicket.behavior.HeaderContributor;
+import org.apache.wicket.markup.html.IHeaderResponse;
+import org.apache.wicket.markup.html.JavascriptPackageResource;
+import org.wamblee.wicket.jquery.JQueryBehavior;
+import org.wamblee.wicket.jquery.JQueryUtils;
+
+/**
+ * Preselection behavior that preselects unaltered text in forms. When applied
+ * to a certain component, the behavior is valid for all children of the
+ * component. Therefore, it is possible to attach this behavior to any component,
+ * well as to a form or even individual fields in a form. It is not possible however to apply this
+ * behavior to a page. The behavior applies
+ * to text input fields and textareas. Upon focus, the text in the field is
+ * selected if it it still identical to the default value.
+ * 
+ * @author Erik Brakkee
+ * 
+ */
+public class PreselectionBehavior extends CompositeBehavior {
+
+    static final String PRESELECT_SCRIPT = "wamblee-preselect.js";
+
+    private static HeaderContributor CACHE = JavascriptPackageResource
+        .getHeaderContribution(PreselectionBehavior.class, PRESELECT_SCRIPT);
+
+    private Component component;
+
+    public PreselectionBehavior() {
+        super(new JQueryBehavior(), new NamespaceBehavior(), CACHE);
+    }
+
+    @Override
+    public void bind(Component aComponent) {
+        if (component != null) {
+            throw new IllegalStateException(
+                "this kind of handler cannot be attached to " +
+                    "multiple components; it is already attached to component " +
+                    component + ", but component " + aComponent +
+                    " wants to be attached too");
+        }
+        if ( aComponent instanceof Page) { 
+            throw new IllegalStateException("This behavior cannot be applied to a page: " + aComponent);
+        }
+        component = aComponent;
+        super.bind(aComponent);
+        aComponent.setOutputMarkupId(true);
+    }
+
+    @Override
+    public void renderHead(IHeaderResponse aResponse) {
+        super.renderHead(aResponse);
+        String jsString = JQueryUtils.createReadyFunction("preselectSetup", component);
+        aResponse.renderJavascript(jsString, null);
+    }
+
+}
-- 
2.31.1