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

editor/tools/plugins/com.xored.glance.ui/src/com/xored/glance/internal/ui/viewers/TextViewerBlock.java

Index: editor/tools/plugins/com.xored.glance.ui/src/com/xored/glance/internal/ui/viewers/TextViewerBlock.java
===================================================================
--- editor/tools/plugins/com.xored.glance.ui/src/com/xored/glance/internal/ui/viewers/TextViewerBlock.java	(revision 0)
+++ editor/tools/plugins/com.xored.glance.ui/src/com/xored/glance/internal/ui/viewers/TextViewerBlock.java	(revision 0)
@@ -0,0 +1,104 @@
+/*******************************************************************************
+ * 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.internal.ui.viewers;
+
+import java.lang.reflect.Field;
+import java.util.List;
+
+import org.eclipse.core.runtime.ListenerList;
+import org.eclipse.jface.text.ITextListener;
+import org.eclipse.jface.text.TextEvent;
+import org.eclipse.jface.text.TextViewer;
+
+import com.xored.glance.ui.sources.ITextBlock;
+import com.xored.glance.ui.sources.ITextBlockListener;
+import com.xored.glance.ui.sources.TextChangedEvent;
+
+/**
+ * @author Yuri Strot
+ */
+public class TextViewerBlock implements ITextBlock, ITextListener {
+
+  public TextViewerBlock(TextViewer viewer) {
+    this.viewer = viewer;
+    listeners = new ListenerList();
+    addListeners();
+  }
+
+  public void dispose() {
+    removeListeners();
+  }
+
+  protected void addListeners() {
+    if (!addFirstListener()) {
+      viewer.addTextListener(this);
+    }
+  }
+
+  /**
+   * Add our text listener to the beginning of the listener list thro reflection. This method return
+   * true if this operation succeed and fail otherwise.
+   */
+  private boolean addFirstListener() {
+    try {
+      Field filed = TextViewer.class.getDeclaredField("fTextListeners");
+      filed.setAccessible(true);
+      @SuppressWarnings("unchecked")
+      List<Object> list = (List<Object>) filed.get(viewer);
+      if (list == null) {
+        // no listeners, can add it usual way
+        return false;
+      }
+      if (!list.contains(this)) {
+        list.add(0, this);
+      }
+      return true;
+    } catch (Exception e) {
+      return false;
+    }
+  }
+
+  protected void removeListeners() {
+    viewer.removeTextListener(this);
+  }
+
+  public void textChanged(TextEvent event) {
+    if (event.getDocumentEvent() != null) {
+      TextChangedEvent changedEvent = new TextChangedEvent(event.getOffset(), event.getLength(),
+          event.getReplacedText());
+      fireTextChanged(changedEvent);
+    }
+  }
+
+  protected void fireTextChanged(TextChangedEvent changedEvent) {
+    Object[] objects = listeners.getListeners();
+    for (Object object : objects) {
+      ITextBlockListener listener = (ITextBlockListener) object;
+      listener.textChanged(changedEvent);
+    }
+  }
+
+  public void addTextBlockListener(ITextBlockListener listener) {
+    listeners.add(listener);
+  }
+
+  public String getText() {
+    return viewer.getDocument().get();
+  }
+
+  public void removeTextBlockListener(ITextBlockListener listener) {
+    listeners.remove(listener);
+  }
+
+  public int compareTo(ITextBlock o) {
+    return 0;
+  }
+
+  private ListenerList listeners;
+  protected TextViewer viewer;
+
+}