/*******************************************************************************
* Copyright (c) 2006, 2007 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
*******************************************************************************/
package org.eclipse.wst.sse.ui;
import java.util.ResourceBundle;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.action.IMenuManager;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.text.ITextOperationTarget;
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.wst.sse.ui.internal.SSEUIMessages;
import org.eclipse.wst.sse.ui.internal.SSEUIPlugin;
import org.eclipse.wst.sse.ui.internal.projection.AbstractStructuredFoldingStrategy;
class FoldingActionGroup extends ActionGroup {
private static abstract class PreferenceAction extends ResourceAction implements IUpdate {
PreferenceAction(ResourceBundle bundle, String prefix, int style) {
super(bundle, prefix, style);
}
}
private ProjectionViewer fViewer;
private final PreferenceAction fToggle;
private final TextOperationAction fExpandAll;
private final IProjectionListener fProjectionListener;
private final TextOperationAction fCollapseAll;
/**
* 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;
fExpandAll = null;
fCollapseAll = null;
fProjectionListener = null;
return;
}
fViewer = (ProjectionViewer) viewer;
fProjectionListener = new IProjectionListener() {
public void projectionEnabled() {
update();
}
public void projectionDisabled() {
update();
}
};
fViewer.addProjectionListener(fProjectionListener);
fToggle = new PreferenceAction(SSEUIMessages.getResourceBundle(), "Projection_Toggle_", IAction.AS_CHECK_BOX) { //$NON-NLS-1$
public void run() {
IPreferenceStore store = SSEUIPlugin.getDefault().getPreferenceStore();
boolean current = store.getBoolean(AbstractStructuredFoldingStrategy.FOLDING_ENABLED);
store.setValue(AbstractStructuredFoldingStrategy.FOLDING_ENABLED, !current);
}
public void update() {
ITextOperationTarget target = (ITextOperationTarget) editor.getAdapter(ITextOperationTarget.class);
boolean isEnabled = (target != null && target.canDoOperation(ProjectionViewer.TOGGLE));
setEnabled(isEnabled);
}
};
IPreferenceStore store = SSEUIPlugin.getDefault().getPreferenceStore();
boolean checked = store.getBoolean(AbstractStructuredFoldingStrategy.FOLDING_ENABLED);
fToggle.setChecked(checked);
fToggle.setActionDefinitionId(IFoldingCommandIds.FOLDING_TOGGLE);
editor.setAction("FoldingToggle", fToggle); //$NON-NLS-1$
fExpandAll = new TextOperationAction(SSEUIMessages.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(SSEUIMessages.getResourceBundle(), "Projection_CollapseAll_", editor, ProjectionViewer.COLLAPSE_ALL, true); //$NON-NLS-1$
fCollapseAll.setActionDefinitionId(IFoldingCommandIds.FOLDING_COLLAPSE_ALL);
editor.setAction("FoldingCollapseAll", fCollapseAll); //$NON-NLS-1$
}
/**
* 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()
*/
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());
fExpandAll.update();
fCollapseAll.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(fCollapseAll);
}
}
/*
* @see org.eclipse.ui.actions.ActionGroup#updateActionBars()
*/
public void updateActionBars() {
update();
}
}