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/*******************************************************************************
* Copyright (c) 2000, 2008 IBM Corporation and others.
* 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:
* IBM Corporation - initial API and implementation
* Anton Leherbauer (Wind River Systems)
*******************************************************************************/
package org.eclipse.cdt.internal.ui.actions;
import java.util.ResourceBundle;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.action.IMenuManager;
import org.eclipse.jface.text.ITextViewer;
import org.eclipse.jface.text.source.projection.IProjectionListener;
import org.eclipse.jface.text.source.projection.ProjectionViewer;
import org.eclipse.ui.actions.ActionGroup;
import org.eclipse.ui.editors.text.IFoldingCommandIds;
import org.eclipse.ui.texteditor.ITextEditor;
import org.eclipse.ui.texteditor.IUpdate;
import org.eclipse.ui.texteditor.ResourceAction;
import org.eclipse.ui.texteditor.TextOperationAction;
import org.eclipse.cdt.internal.ui.editor.CEditor;
/**
* Groups the CDT folding actions.
*
* @since 3.0
*/
public class FoldingActionGroup extends ActionGroup {
private static abstract class PreferenceAction extends ResourceAction implements IUpdate {
PreferenceAction(ResourceBundle bundle, String prefix, int style) {
super(bundle, prefix, style);
update();
}
}
private class FoldingAction extends PreferenceAction {
FoldingAction(ResourceBundle bundle, String prefix) {
super(bundle, prefix, IAction.AS_PUSH_BUTTON);
}
public void update() {
setEnabled(FoldingActionGroup.this.isEnabled() && fViewer.isProjectionMode());
}
}
private ProjectionViewer fViewer;
private IProjectionListener fProjectionListener;
private TextOperationAction fToggle;
private TextOperationAction fExpand;
private TextOperationAction fCollapse;
private TextOperationAction fExpandAll;
// since 4.0
private TextOperationAction fCollapseAll;
private PreferenceAction fRestoreDefaults;
/**
* Creates a new projection action group for <code>editor</code>. If the
* supplied viewer is not an instance of <code>ProjectionViewer</code>, the
* action group is disabled.
*
* @param editor the text editor to operate on
* @param viewer the viewer of the editor
*/
public FoldingActionGroup(final ITextEditor editor, ITextViewer viewer) {
if (!(viewer instanceof ProjectionViewer)) {
fToggle= null;
fExpand= null;
fCollapse= null;
fExpandAll= null;
fCollapseAll= null;
fRestoreDefaults= null;
fProjectionListener= null;
return;
}
fViewer= (ProjectionViewer) viewer;
fProjectionListener= new IProjectionListener() {
public void projectionEnabled() {
update();
}
public void projectionDisabled() {
update();
}
};
fViewer.addProjectionListener(fProjectionListener);
fToggle= new TextOperationAction(FoldingMessages.getResourceBundle(), "Projection.Toggle.", editor, ProjectionViewer.TOGGLE, true); //$NON-NLS-1$
fToggle.setActionDefinitionId(IFoldingCommandIds.FOLDING_TOGGLE);
editor.setAction("FoldingToggle", fToggle); //$NON-NLS-1$
fExpandAll= new TextOperationAction(FoldingMessages.getResourceBundle(), "Projection.ExpandAll.", editor, ProjectionViewer.EXPAND_ALL, true); //$NON-NLS-1$
fExpandAll.setActionDefinitionId(IFoldingCommandIds.FOLDING_EXPAND_ALL);
editor.setAction("FoldingExpandAll", fExpandAll); //$NON-NLS-1$
fCollapseAll= new TextOperationAction(FoldingMessages.getResourceBundle(), "Projection.CollapseAll.", editor, ProjectionViewer.COLLAPSE_ALL, true); //$NON-NLS-1$
fCollapseAll.setActionDefinitionId(IFoldingCommandIds.FOLDING_COLLAPSE_ALL);
editor.setAction("FoldingCollapseAll", fCollapseAll); //$NON-NLS-1$
fExpand= new TextOperationAction(FoldingMessages.getResourceBundle(), "Projection.Expand.", editor, ProjectionViewer.EXPAND, true); //$NON-NLS-1$
fExpand.setActionDefinitionId(IFoldingCommandIds.FOLDING_EXPAND);
editor.setAction("FoldingExpand", fExpand); //$NON-NLS-1$
fCollapse= new TextOperationAction(FoldingMessages.getResourceBundle(), "Projection.Collapse.", editor, ProjectionViewer.COLLAPSE, true); //$NON-NLS-1$
fCollapse.setActionDefinitionId(IFoldingCommandIds.FOLDING_COLLAPSE);
editor.setAction("FoldingCollapse", fCollapse); //$NON-NLS-1$
fRestoreDefaults= new FoldingAction(FoldingMessages.getResourceBundle(), "Projection.Restore.") { //$NON-NLS-1$
@Override
public void run() {
if (editor instanceof CEditor) {
CEditor cEditor= (CEditor) editor;
cEditor.resetProjection();
}
}
};
fRestoreDefaults.setActionDefinitionId(IFoldingCommandIds.FOLDING_RESTORE);
editor.setAction("FoldingRestore", fRestoreDefaults); //$NON-NLS-1$
}
/**
* Returns <code>true</code> if the group is enabled.
* <pre>
* Invariant: isEnabled() <=> fViewer and all actions are != null.
* </pre>
*
* @return <code>true</code> if the group is enabled
*/
protected boolean isEnabled() {
return fViewer != null;
}
/*
* @see org.eclipse.ui.actions.ActionGroup#dispose()
*/
@Override
public void dispose() {
if (isEnabled()) {
fViewer.removeProjectionListener(fProjectionListener);
fViewer= null;
}
super.dispose();
}
/**
* Updates the actions.
*/
protected void update() {
if (isEnabled()) {
fToggle.update();
fToggle.setChecked(fViewer.isProjectionMode());
fExpand.update();
fExpandAll.update();
fCollapse.update();
fCollapseAll.update();
fRestoreDefaults.update();
}
}
/**
* Fills the menu with all folding actions.
*
* @param manager the menu manager for the folding submenu
*/
public void fillMenu(IMenuManager manager) {
if (isEnabled()) {
update();
manager.add(fToggle);
manager.add(fExpandAll);
manager.add(fExpand);
manager.add(fCollapse);
manager.add(fCollapseAll);
manager.add(fRestoreDefaults);
}
}
/*
* @see org.eclipse.ui.actions.ActionGroup#updateActionBars()
*/
@Override
public void updateActionBars() {
update();
}
}
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