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

editor/tools/plugins/com.xored.glance.ui/src/com/xored/glance/internal/ui/sources/TextSourceListener.java

Index: editor/tools/plugins/com.xored.glance.ui/src/com/xored/glance/internal/ui/sources/TextSourceListener.java
===================================================================
--- editor/tools/plugins/com.xored.glance.ui/src/com/xored/glance/internal/ui/sources/TextSourceListener.java	(revision 0)
+++ editor/tools/plugins/com.xored.glance.ui/src/com/xored/glance/internal/ui/sources/TextSourceListener.java	(revision 0)
@@ -0,0 +1,79 @@
+/**
+ * 
+ */
+package com.xored.glance.internal.ui.sources;
+
+import org.eclipse.core.runtime.ListenerList;
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.widgets.Control;
+import org.eclipse.swt.widgets.Display;
+import org.eclipse.swt.widgets.Event;
+import org.eclipse.swt.widgets.Listener;
+import org.eclipse.ui.PlatformUI;
+
+import com.xored.glance.ui.sources.ITextSourceDescriptor;
+
+/**
+ * @author Yuri Strot
+ */
+public class TextSourceListener implements Listener {
+
+  public TextSourceListener(ITextSourceDescriptor[] descriptors) {
+    this.descriptors = descriptors;
+  }
+
+  public void addSourceProviderListener(ISourceProviderListener listener) {
+    if (listeners.size() == 0) {
+      getDisplay().addFilter(SWT.FocusIn, this);
+    }
+    listeners.add(listener);
+  }
+
+  public void removeSourceProviderListener(ISourceProviderListener listener) {
+    listeners.remove(listener);
+    if (listeners.size() == 0) {
+      getDisplay().removeFilter(SWT.FocusIn, this);
+      selection = null;
+    }
+  }
+
+  public void handleEvent(Event event) {
+    TextSourceMaker creator = getCreator(getDisplay().getFocusControl());
+    if (!creator.equals(selection)) {
+      selection = creator;
+      Object[] objects = listeners.getListeners();
+      for (Object object : objects) {
+        ISourceProviderListener listener = (ISourceProviderListener) object;
+        listener.sourceChanged(selection);
+      }
+    }
+  }
+
+  public TextSourceMaker getSelection() {
+    return getCreator(getDisplay().getFocusControl());
+  }
+
+  private TextSourceMaker getCreator(Control control) {
+    return new TextSourceMaker(getDescriptor(control), control);
+  }
+
+  private ITextSourceDescriptor getDescriptor(Control control) {
+    if (control != null) {
+      for (ITextSourceDescriptor descriptor : descriptors) {
+        if (descriptor.isValid(control)) {
+          return descriptor;
+        }
+      }
+    }
+    return null;
+  }
+
+  private Display getDisplay() {
+    return PlatformUI.getWorkbench().getDisplay();
+  }
+
+  private TextSourceMaker selection;
+  private ListenerList listeners = new ListenerList();
+  private ITextSourceDescriptor[] descriptors;
+
+}