intial source from ttp://www.sf.net/projects/wdte

[phpeclipse.git] / archive / net.sourceforge.phpeclipse.css.ui / src / net / sourceforge / phpeclipse / css / ui / internal / editor / ShowSelectedElementOnlyAction.java

diff --git a/archive/net.sourceforge.phpeclipse.css.ui/src/net/sourceforge/phpeclipse/css/ui/internal/editor/ShowSelectedElementOnlyAction.java b/archive/net.sourceforge.phpeclipse.css.ui/src/net/sourceforge/phpeclipse/css/ui/internal/editor/ShowSelectedElementOnlyAction.java
new file mode 100644 (file)
index 0000000..ab1e80f
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+++ b/archive/net.sourceforge.phpeclipse.css.ui/src/net/sourceforge/phpeclipse/css/ui/internal/editor/ShowSelectedElementOnlyAction.java
@@ -0,0 +1,150 @@
+/*
+ * Copyright (c) 2003-2004 Christopher Lenz and others.
+ * All rights reserved. This program and the accompanying materials 
+ * are made available under the terms of the Common Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/cpl-v10.html
+ * 
+ * Contributors:
+ *     Christopher Lenz - initial API and implementation
+ * 
+ * $Id: ShowSelectedElementOnlyAction.java,v 1.1 2004-09-02 18:11:50 jsurfer Exp $
+ */
+
+package net.sourceforge.phpeclipse.css.ui.internal.editor;
+
+import net.sourceforge.phpeclipse.css.ui.CssUI;
+import net.sourceforge.phpeclipse.css.ui.internal.CssUIMessages;
+import net.sourceforge.phpeclipse.css.ui.internal.CssUIPreferences;
+
+import org.eclipse.jface.preference.IPreferenceStore;
+import org.eclipse.jface.text.IRegion;
+import org.eclipse.jface.util.IPropertyChangeListener;
+import org.eclipse.jface.util.PropertyChangeEvent;
+import org.eclipse.ui.texteditor.ITextEditor;
+import org.eclipse.ui.texteditor.TextEditorAction;
+
+/**
+ * A toolbar action which toggles the presentation model of the connected text 
+ * editor. The editor shows either the highlight range only or always the whole 
+ * document.
+ * 
+ * <p>
+ *  This class is an implementation for the retargetable action 
+ *  <code>TOGGLE_SHOW_SELECTED_ELEMENT_ONLY</code> provided by the platform.
+ * </p>
+ * 
+ * @see org.eclipse.ui.texteditor.ITextEditorActionDefinitionIds#TOGGLE_SHOW_SELECTED_ELEMENT_ONLY
+ */
+public class ShowSelectedElementOnlyAction extends TextEditorAction
+       implements IPropertyChangeListener {
+
+       // Instance Variables ------------------------------------------------------
+
+       private IPreferenceStore store;
+
+       // Constructors ------------------------------------------------------------
+
+       /**
+        * Constructor.
+        */
+       public ShowSelectedElementOnlyAction() {
+               super(CssUIMessages.getResourceBundle(),
+                       "CssEditor.showSelectedElementOnly.", null); //$NON-NLS-1$
+               store = CssUI.getDefault().getPreferenceStore();
+               update();
+       }
+
+       // TextEditor Implementation -----------------------------------------------
+
+       /*
+        * @see org.eclipse.jface.action.IAction#run()
+        */
+       public void run() {
+               ITextEditor editor = getTextEditor();
+               if (editor != null) {
+                       IRegion highlightRange = editor.getHighlightRange();
+                       editor.resetHighlightRange();
+                       boolean show = !editor.showsHighlightRangeOnly();
+                       setChecked(show);
+                       editor.showHighlightRangeOnly(show);
+                       if (highlightRange != null) {
+                               editor.setHighlightRange(highlightRange.getOffset(),
+                                       highlightRange.getLength(), true);
+                       }
+                       store.removePropertyChangeListener(this);
+                       store.setValue(
+                               CssUIPreferences.EDITOR_SHOW_SELECTED_ELEMENT_ONLY, show);
+                       store.addPropertyChangeListener(this);
+               }
+       }
+
+       /*
+        * @see TextEditorAction#setEditor(ITextEditor)
+        */
+       public void setEditor(ITextEditor editor) {
+               super.setEditor(editor);
+               if (editor != null) {
+                       if (store == null) {
+                               store = CssUI.getDefault().getPreferenceStore();
+                               store.addPropertyChangeListener(this);
+                       }
+                       synchronizeWithPreference(editor);
+               } else if (store != null) {
+                       store.removePropertyChangeListener(this);
+                       store = null;
+               }
+               update();
+       }
+       
+       /*
+        * @see org.eclipse.ui.texteditor.IUpdate#update()
+        */
+       public void update() {
+               ITextEditor editor = getTextEditor();
+               if (editor != null) {
+                       setChecked(getTextEditor().showsHighlightRangeOnly());
+                       setEnabled(true);
+               } else {
+                       setEnabled(false);
+               }
+       }
+
+       // IPropertyChangeListener Implementation ----------------------------------
+
+       /*
+        * @see IPropertyChangeListener#propertyChange(PropertyChangeEvent)
+        */
+       public void propertyChange(PropertyChangeEvent event) {
+               String p = event.getProperty();
+               if (CssUIPreferences.EDITOR_SHOW_SELECTED_ELEMENT_ONLY.equals(p)) {
+                       synchronizeWithPreference(getTextEditor());
+               }
+       }
+
+       // Private Methods ---------------------------------------------------------
+
+       /**
+        * Synchronizes the appearance of the editor with what the preference store
+        * contains.
+        * 
+        * @param editor the editor to synchronize
+        */
+       private void synchronizeWithPreference(ITextEditor editor) {
+               if (editor != null) {
+                       boolean show = this.store.getBoolean(
+                               CssUIPreferences.EDITOR_SHOW_SELECTED_ELEMENT_ONLY);
+                       setChecked(show);
+                       if (show != editor.showsHighlightRangeOnly()) {
+                               IRegion highlightRange = editor.getHighlightRange();
+                               editor.resetHighlightRange();
+                               editor.showHighlightRangeOnly(show);
+                               if (highlightRange != null) {
+                                       editor.setHighlightRange(highlightRange.getOffset(),
+                                               highlightRange.getLength(), true);
+                               }
+                       }
+               }
+       }
+
+}