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   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2003 IBM Corporation and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v10.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  *******************************************************************************/
  11 package net.sourceforge.phpeclipse.phpeditor;
  12
  13 import net.sourceforge.phpdt.internal.ui.PHPUiImages;
  14 import net.sourceforge.phpdt.ui.PreferenceConstants;
  15 import net.sourceforge.phpdt.ui.actions.PHPEditorActionDefinitionIds;
  16 import net.sourceforge.phpeclipse.PHPeclipsePlugin;
  17 import net.sourceforge.phpeclipse.ui.WebUI;
  18
  19 import org.eclipse.jface.preference.IPreferenceStore;
  20 import org.eclipse.jface.text.IRegion;
  21 import org.eclipse.jface.util.IPropertyChangeListener;
  22 import org.eclipse.jface.util.PropertyChangeEvent;
  23 import org.eclipse.ui.texteditor.ITextEditor;
  24 import org.eclipse.ui.texteditor.TextEditorAction;
  25
  26 /**
  27  * A toolbar action which toggles the presentation model of the connected text
  28  * editor. The editor shows either the highlight range only or always the whole
  29  * document.
  30  */
  31 public class TogglePresentationAction extends TextEditorAction implements
  32                 IPropertyChangeListener {
  33
  34         private IPreferenceStore fStore;
  35
  36         /**
  37          * Constructs and updates the action.
  38          */
  39         public TogglePresentationAction() {
  40                 super(PHPEditorMessages.getResourceBundle(),
  41                                 "TogglePresentation.", null); //$NON-NLS-1$
  42                 PHPUiImages.setToolImageDescriptors(this, "segment_edit.gif"); //$NON-NLS-1$
  43                 setToolTipText(PHPEditorMessages
  44                                 .getString("TogglePresentation.tooltip")); //$NON-NLS-1$
  45                 setActionDefinitionId(PHPEditorActionDefinitionIds.TOGGLE_PRESENTATION);
  46                 // WorkbenchHelp.setHelp(this,
  47                 // IJavaHelpContextIds.TOGGLE_PRESENTATION_ACTION);
  48                 update();
  49         }
  50
  51         /*
  52          * @see IAction#actionPerformed
  53          */
  54         public void run() {
  55
  56                 ITextEditor editor = getTextEditor();
  57                 if (editor == null)
  58                         return;
  59
  60                 IRegion remembered = editor.getHighlightRange();
  61                 editor.resetHighlightRange();
  62
  63                 boolean showAll = !editor.showsHighlightRangeOnly();
  64                 setChecked(showAll);
  65
  66                 editor.showHighlightRangeOnly(showAll);
  67                 if (remembered != null)
  68                         editor.setHighlightRange(remembered.getOffset(), remembered
  69                                         .getLength(), true);
  70
  71                 fStore.removePropertyChangeListener(this);
  72                 fStore.setValue(PreferenceConstants.EDITOR_SHOW_SEGMENTS, showAll);
  73                 fStore.addPropertyChangeListener(this);
  74         }
  75
  76         /*
  77          * @see TextEditorAction#update
  78          */
  79         public void update() {
  80                 ITextEditor editor = getTextEditor();
  81                 boolean checked = (editor != null && editor.showsHighlightRangeOnly());
  82                 setChecked(checked);
  83                 setEnabled(editor != null);
  84         }
  85
  86         /*
  87          * @see TextEditorAction#setEditor(ITextEditor)
  88          */
  89         public void setEditor(ITextEditor editor) {
  90
  91                 super.setEditor(editor);
  92
  93                 if (editor != null) {
  94
  95                         if (fStore == null) {
  96                                 fStore = WebUI.getDefault().getPreferenceStore();
  97                                 fStore.addPropertyChangeListener(this);
  98                         }
  99                         synchronizeWithPreference(editor);
 100
 101                 } else if (fStore != null) {
 102                         fStore.removePropertyChangeListener(this);
 103                         fStore = null;
 104                 }
 105
 106                 update();
 107         }
 108
 109         /**
 110          * Synchronizes the appearance of the editor with what the preference store
 111          * tells him.
 112          */
 113         private void synchronizeWithPreference(ITextEditor editor) {
 114
 115                 if (editor == null)
 116                         return;
 117
 118                 boolean showSegments = fStore
 119                                 .getBoolean(PreferenceConstants.EDITOR_SHOW_SEGMENTS);
 120                 setChecked(showSegments);
 121
 122                 if (editor.showsHighlightRangeOnly() != showSegments) {
 123                         IRegion remembered = editor.getHighlightRange();
 124                         editor.resetHighlightRange();
 125                         editor.showHighlightRangeOnly(showSegments);
 126                         if (remembered != null)
 127                                 editor.setHighlightRange(remembered.getOffset(), remembered
 128                                                 .getLength(), true);
 129                 }
 130         }
 131
 132         /*
 133          * @see IPropertyChangeListener#propertyChange(PropertyChangeEvent)
 134          */
 135         public void propertyChange(PropertyChangeEvent event) {
 136                 if (event.getProperty()
 137                                 .equals(PreferenceConstants.EDITOR_SHOW_SEGMENTS))
 138                         synchronizeWithPreference(getTextEditor());
 139         }
 140 }