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/*******************************************************************************
* Copyright (c) 2000, 2009 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.cdt.debug.internal.ui.actions;
import org.eclipse.debug.core.IBreakpointManager;
import org.eclipse.debug.core.ILaunchManager;
import org.eclipse.debug.core.model.IBreakpoint;
import org.eclipse.debug.core.model.IDebugTarget;
import org.eclipse.debug.ui.IDebugView;
import org.eclipse.cdt.debug.core.model.ICBreakpoint;
import org.eclipse.cdt.debug.core.model.ICDebugElement;
import org.eclipse.cdt.debug.ui.CDebugUIPlugin;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.StructuredViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerFilter;
import org.eclipse.swt.widgets.Event;
import org.eclipse.ui.IActionDelegate2;
import org.eclipse.ui.IViewActionDelegate;
import org.eclipse.ui.IViewPart;
/**
* A base class for the CDT filtering actions added to views. We disable the action if
* the view has no CDT content.
*/
public abstract class ViewFilterAction extends ViewerFilter implements IViewActionDelegate, IActionDelegate2 {
private IViewPart fView;
private IAction fAction;
public ViewFilterAction() {
super();
}
/* (non-Javadoc)
* @see org.eclipse.ui.IViewActionDelegate#init(org.eclipse.ui.IViewPart)
*/
public void init(IViewPart view) {
fView = view;
fAction.setChecked(getPreferenceValue(view));
run(fAction);
}
/* (non-Javadoc)
* @see org.eclipse.ui.IActionDelegate2#init(org.eclipse.jface.action.IAction)
*/
public void init(IAction action) {
fAction = action;
}
/* (non-Javadoc)
* @see org.eclipse.ui.IActionDelegate2#dispose()
*/
public void dispose() {
}
/* (non-Javadoc)
* @see org.eclipse.ui.IActionDelegate2#runWithEvent(org.eclipse.jface.action.IAction, org.eclipse.swt.widgets.Event)
*/
public void runWithEvent(IAction action, Event event) {
run(action);
}
/* (non-Javadoc)
* @see org.eclipse.ui.IActionDelegate#run(org.eclipse.jface.action.IAction)
*/
public void run(IAction action) {
StructuredViewer viewer = getStructuredViewer();
ViewerFilter[] filters = viewer.getFilters();
ViewerFilter filter = null;
for (int i = 0; i < filters.length; i++) {
if (filters[i] == this) {
filter = filters[i];
break;
}
}
if (filter == null) {
viewer.addFilter(this);
}
viewer.refresh();
IPreferenceStore store = getPreferenceStore();
String key = getView().getSite().getId() + "." + getPreferenceKey(); //$NON-NLS-1$
store.setValue(key, action.isChecked());
CDebugUIPlugin.getDefault().savePluginPreferences();
}
/**
* Disable the action if there is no CDT content in the view. There is no
* practical generic way to test that so we have to use view specific tests.
* Currently, we support the Debug and Breakpoints view. Support for other
* views should be added as needed.
*
* Note that because we do this test on a view selection change, there can
* be some edge cases where we'll be enabled even though there is no CDT
* content. Closing those gaps would not be easy, and thus not worth the
* effort as no harm is done by an unintentional enablement.
*
* @see org.eclipse.ui.IActionDelegate#selectionChanged(org.eclipse.jface.action.IAction,
* org.eclipse.jface.viewers.ISelection)
*/
public void selectionChanged(IAction action, ISelection selection) {
boolean enable = false;
Object input = getStructuredViewer().getInput();
// Debug view
if (input instanceof ILaunchManager) {
ILaunchManager launchmgr = (ILaunchManager)input;
IDebugTarget[] debugTargets = launchmgr.getDebugTargets();
for (IDebugTarget debugTarget : debugTargets) {
if (debugTarget instanceof ICDebugElement) {
enable = true;
break;
}
}
}
// Breakpoints view
else if (input instanceof IBreakpointManager) {
IBreakpointManager bkptmgr = (IBreakpointManager)input;
IBreakpoint[] bkpts = bkptmgr.getBreakpoints();
for (IBreakpoint bkpt : bkpts) {
if (bkpt instanceof ICBreakpoint) {
enable = true;
break;
}
}
}
// unsupported view; action will always be enabled.
else {
enable = true;
}
fAction.setEnabled(enable);
}
protected IPreferenceStore getPreferenceStore() {
return CDebugUIPlugin.getDefault().getPreferenceStore();
}
/**
* Returns the value of this filters preference (on/off) for the given
* view.
*
* @param part
* @return boolean
*/
protected boolean getPreferenceValue(IViewPart part) {
String baseKey = getPreferenceKey();
String viewKey = part.getSite().getId();
String compositeKey = viewKey + "." + baseKey; //$NON-NLS-1$
IPreferenceStore store = getPreferenceStore();
boolean value = false;
if (store.contains(compositeKey)) {
value = store.getBoolean(compositeKey);
} else {
value = store.getBoolean(baseKey);
}
return value;
}
/**
* Returns the key for this action's preference
*
* @return String
*/
protected abstract String getPreferenceKey();
protected IViewPart getView() {
return fView;
}
protected StructuredViewer getStructuredViewer() {
IDebugView view = (IDebugView)getView().getAdapter(IDebugView.class);
if (view != null) {
Viewer viewer = view.getViewer();
if (viewer instanceof StructuredViewer) {
return (StructuredViewer)viewer;
}
}
return null;
}
/**
* Returns whether this action is seleted/checked.
*
* @return whether this action is seleted/checked
*/
protected boolean getValue() {
return fAction.isChecked();
}
}
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