New UI for Find command: find-as-you-type.

editor/tools/plugins/com.xored.glance.ui/src/com/xored/glance/ui/viewers/utils/ViewerUtils.java

Index: editor/tools/plugins/com.xored.glance.ui/src/com/xored/glance/ui/viewers/utils/ViewerUtils.java
===================================================================
--- editor/tools/plugins/com.xored.glance.ui/src/com/xored/glance/ui/viewers/utils/ViewerUtils.java	(revision 0)
+++ editor/tools/plugins/com.xored.glance.ui/src/com/xored/glance/ui/viewers/utils/ViewerUtils.java	(revision 0)
@@ -0,0 +1,51 @@
+/*******************************************************************************
+ * Copyright (c) 2012 xored software, Inc. All rights reserved. This program and the accompanying
+ * materials are made available under the terms of the Eclipse Public License v1.0 which accompanies
+ * this distribution, and is available at http://www.eclipse.org/legal/epl-v10.html Contributors:
+ * xored software, Inc. - initial API and implementation (Yuri Strot)
+ ******************************************************************************/
+package com.xored.glance.ui.viewers.utils;
+
+import java.lang.reflect.Field;
+
+import org.eclipse.jface.text.ITextViewer;
+import org.eclipse.jface.viewers.TreeViewer;
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.custom.StyledText;
+import org.eclipse.swt.widgets.Control;
+import org.eclipse.swt.widgets.Listener;
+import org.eclipse.swt.widgets.Tree;
+import org.eclipse.swt.widgets.TypedListener;
+
+public class ViewerUtils {
+
+  public static ITextViewer getTextViewer(StyledText text) {
+    return getViewer(ITextViewer.class, text, SWT.Selection);
+  }
+
+  public static TreeViewer getTreeViewer(Tree tree) {
+    return getViewer(TreeViewer.class, tree, SWT.Expand);
+  }
+
+  private static <T> T getViewer(Class<T> clazz, Control control, int event) {
+    Listener[] listeners = control.getListeners(event);
+    for (Listener listener : listeners) {
+      Object lookFor = listener;
+      if (listener instanceof TypedListener) {
+        lookFor = ((TypedListener) listener).getEventListener();
+      }
+      try {
+        Field this$0 = lookFor.getClass().getDeclaredField("this$0");
+        this$0.setAccessible(true);
+        Object viewer = this$0.get(lookFor);
+        if (clazz.isInstance(viewer)) {
+          return clazz.cast(viewer);
+        }
+      } catch (Exception e) {
+        // ignore exceptions
+      }
+    }
+    return null;
+  }
+
+}