--- /dev/null
+/*******************************************************************************
+ * Copyright (c) 2000, 2003 IBM Corporation 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:
+ * IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package net.sourceforge.phpeclipse.phpeditor;
+
+
+import net.sourceforge.phpdt.internal.ui.PHPUiImages;
+import net.sourceforge.phpdt.ui.PreferenceConstants;
+import net.sourceforge.phpdt.ui.actions.PHPEditorActionDefinitionIds;
+import net.sourceforge.phpeclipse.PHPeclipsePlugin;
+
+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.
+ */
+public class TogglePresentationAction extends TextEditorAction implements IPropertyChangeListener {
+
+ private IPreferenceStore fStore;
+
+ /**
+ * Constructs and updates the action.
+ */
+ public TogglePresentationAction() {
+ super(PHPEditorMessages.getResourceBundle(), "TogglePresentation.", null); //$NON-NLS-1$
+ PHPUiImages.setToolImageDescriptors(this, "segment_edit.gif"); //$NON-NLS-1$
+ setToolTipText(PHPEditorMessages.getString("TogglePresentation.tooltip")); //$NON-NLS-1$
+ setActionDefinitionId(PHPEditorActionDefinitionIds.TOGGLE_PRESENTATION);
+// WorkbenchHelp.setHelp(this, IJavaHelpContextIds.TOGGLE_PRESENTATION_ACTION);
+ update();
+ }
+
+ /*
+ * @see IAction#actionPerformed
+ */
+ public void run() {
+
+ ITextEditor editor= getTextEditor();
+ if (editor == null)
+ return;
+
+ IRegion remembered= editor.getHighlightRange();
+ editor.resetHighlightRange();
+
+ boolean showAll= !editor.showsHighlightRangeOnly();
+ setChecked(showAll);
+
+ editor.showHighlightRangeOnly(showAll);
+ if (remembered != null)
+ editor.setHighlightRange(remembered.getOffset(), remembered.getLength(), true);
+
+ fStore.removePropertyChangeListener(this);
+ fStore.setValue(PreferenceConstants.EDITOR_SHOW_SEGMENTS, showAll);
+ fStore.addPropertyChangeListener(this);
+ }
+
+ /*
+ * @see TextEditorAction#update
+ */
+ public void update() {
+ ITextEditor editor= getTextEditor();
+ boolean checked= (editor != null && editor.showsHighlightRangeOnly());
+ setChecked(checked);
+ setEnabled(editor != null);
+ }
+
+ /*
+ * @see TextEditorAction#setEditor(ITextEditor)
+ */
+ public void setEditor(ITextEditor editor) {
+
+ super.setEditor(editor);
+
+ if (editor != null) {
+
+ if (fStore == null) {
+ fStore= PHPeclipsePlugin.getDefault().getPreferenceStore();
+ fStore.addPropertyChangeListener(this);
+ }
+ synchronizeWithPreference(editor);
+
+ } else if (fStore != null) {
+ fStore.removePropertyChangeListener(this);
+ fStore= null;
+ }
+
+ update();
+ }
+
+ /**
+ * Synchronizes the appearance of the editor with what the preference store tells him.
+ */
+ private void synchronizeWithPreference(ITextEditor editor) {
+
+ if (editor == null)
+ return;
+
+ boolean showSegments= fStore.getBoolean(PreferenceConstants.EDITOR_SHOW_SEGMENTS);
+ setChecked(showSegments);
+
+ if (editor.showsHighlightRangeOnly() != showSegments) {
+ IRegion remembered= editor.getHighlightRange();
+ editor.resetHighlightRange();
+ editor.showHighlightRangeOnly(showSegments);
+ if (remembered != null)
+ editor.setHighlightRange(remembered.getOffset(), remembered.getLength(), true);
+ }
+ }
+
+ /*
+ * @see IPropertyChangeListener#propertyChange(PropertyChangeEvent)
+ */
+ public void propertyChange(PropertyChangeEvent event) {
+ if (event.getProperty().equals(PreferenceConstants.EDITOR_SHOW_SEGMENTS))
+ synchronizeWithPreference(getTextEditor());
+ }
+}