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/*******************************************************************************
* Copyright (c) 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.debug.internal.ui.contextlaunching;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.eclipse.core.expressions.EvaluationContext;
import org.eclipse.core.expressions.IEvaluationContext;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.debug.core.ILaunchConfiguration;
import org.eclipse.debug.internal.ui.DebugUIPlugin;
import org.eclipse.debug.internal.ui.IInternalDebugUIConstants;
import org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationManager;
import org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationSelectionDialog;
import org.eclipse.debug.internal.ui.launchConfigurations.LaunchShortcutExtension;
import org.eclipse.debug.internal.ui.launchConfigurations.LaunchShortcutSelectionDialog;
import org.eclipse.debug.internal.ui.stringsubstitution.SelectedResourceManager;
import org.eclipse.debug.ui.DebugUITools;
import org.eclipse.debug.ui.ILaunchGroup;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.window.Window;
import org.eclipse.ui.activities.WorkbenchActivityHelper;
import com.ibm.icu.text.MessageFormat;
/**
* Static runner for context launching to provide the base capability of context
* launching to more than one form of action (drop down, toolbar, view, etc)
*
* @see org.eclipse.debug.ui.actions.AbstractLaunchHistoryAction
* @see org.eclipse.debug.ui.actions.LaunchShortcutsAction
* @see org.eclipse.debug.ui.actions.ContextualLaunchAction
* @see org.eclipse.debug.internal.ui.preferences.ContextLaunchingPreferencePage
*
* @since 3.3
* CONTEXTLAUNCHING
*/
public final class ContextRunner {
/**
* The singleton instance of the context runner
*/
private static ContextRunner fgInstance = null;
/**
* Returns the singleton instance of <code>ContextRunner</code>
* @return the singleton instance of <code>ContextRunner</code>
*/
public static ContextRunner getDefault() {
if(fgInstance == null) {
fgInstance = new ContextRunner();
}
return fgInstance;
}
/**
* Performs the context launching given the object context and the mode to launch in.
* @param group
*/
public void launch(ILaunchGroup group) {
IResource resource = SelectedResourceManager.getDefault().getSelectedResource();
//1. resolve resource
if(resource != null) {
selectAndLaunch(resource, group);
return;
}
//2. launch last if no resource
if(!launchLast(group)) {
//3. might be empty workspace try to get shortcuts
List shortcuts = getLaunchShortcutsForEmptySelection();
if(!shortcuts.isEmpty()) {
showShortcutSelectionDialog(resource, shortcuts, group.getMode());
}
else {
MessageDialog.openInformation(DebugUIPlugin.getShell(), ContextMessages.ContextRunner_0, ContextMessages.ContextRunner_7);
}
}
}
/**
* This method launches the last configuration that was launched, if any.
* @param group the launch group to launch with
* @return true if there was a last launch and it was launched, false otherwise
*/
protected boolean launchLast(ILaunchGroup group) {
ILaunchConfiguration config = null;
if(group != null) {
config = DebugUIPlugin.getDefault().getLaunchConfigurationManager().getFilteredLastLaunch(group.getIdentifier());
}
if(config != null) {
DebugUITools.launch(config, group.getMode());
return true;
}
return false;
}
/**
* Creates a listing of the launch shortcut extensions that are applicable to the underlying resource
* @param resource the underlying resource
* @return a listing of applicable launch shortcuts or an empty list, never <code>null</code>
*/
public List getLaunchShortcutsForEmptySelection() {
List list = new ArrayList();
List sc = getLaunchConfigurationManager().getLaunchShortcuts();
List ctxt = new ArrayList();
IEvaluationContext context = new EvaluationContext(null, ctxt);
context.addVariable("selection", ctxt); //$NON-NLS-1$
LaunchShortcutExtension ext = null;
for(Iterator iter = sc.iterator(); iter.hasNext();) {
ext = (LaunchShortcutExtension) iter.next();
try {
if(ext.evalEnablementExpression(context, ext.getContextualLaunchEnablementExpression()) && !WorkbenchActivityHelper.filterItem(ext)) {
if(!list.contains(ext)) {
list.add(ext);
}
}
}
catch(CoreException ce) {/*do nothing*/}
}
return list;
}
/**
* Prompts the user to select a way of launching the current resource, where a 'way'
* is defined as a launch shortcut, and returns if a launch took place
* @param resource
* @param group
* @return if the context was launched in the given mode or not
*/
protected boolean selectAndLaunch(IResource resource, ILaunchGroup group) {
if(group == null) {
return false;
}
ILaunchConfiguration config = getLaunchConfigurationManager().isSharedConfig(resource);
if(config != null) {
DebugUITools.launch(config, group.getMode());
return true;
}
List configs = getLaunchConfigurationManager().getApplicableLaunchConfigurations(resource);
int csize = configs.size();
if(csize == 1) {
DebugUITools.launch((ILaunchConfiguration) configs.get(0), group.getMode());
return true;
}
if(csize < 1) {
List exts = getLaunchConfigurationManager().getLaunchShortcuts(resource);
int esize = exts.size();
if(esize == 1) {
LaunchShortcutExtension ext = (LaunchShortcutExtension) exts.get(0);
ext.launch(new StructuredSelection(resource), group.getMode());
return true;
}
if(esize > 1) {
return showShortcutSelectionDialog(resource, null, group.getMode());
}
if(esize < 1) {
if(DebugUIPlugin.getDefault().getPreferenceStore().getBoolean(IInternalDebugUIConstants.PREF_LAUNCH_LAST_IF_NOT_LAUNCHABLE)) {
if(launchLast(group)) {
return true;
}
else {
MessageDialog.openInformation(DebugUIPlugin.getShell(), ContextMessages.ContextRunner_0, ContextMessages.ContextRunner_7);
return false;
}
}
IProject project = resource.getProject();
if(project != null && !project.equals(resource)) {
selectAndLaunch(project, group);
}
else {
String msg = ContextMessages.ContextRunner_7;
if(!resource.isAccessible()) {
msg = MessageFormat.format(ContextMessages.ContextRunner_13, new String[] {resource.getName()});
}
MessageDialog.openInformation(DebugUIPlugin.getShell(), ContextMessages.ContextRunner_0, msg);
}
}
}
else if(csize > 1){
config = getLaunchConfigurationManager().getMRUConfiguration(configs, group, resource);
if(config != null) {
DebugUITools.launch(config, group.getMode());
return true;
}
else {
return showConfigurationSelectionDialog(configs, group.getMode());
}
}
return false;
}
/**
* Presents the user with a dialog to pick the launch configuration to launch
* @param configurations the listing of applicable configurations to present
* @param mode the mode
* @return true if something was launched, false otherwise
*/
protected boolean showConfigurationSelectionDialog(List configurations, String mode) {
LaunchConfigurationSelectionDialog lsd = new LaunchConfigurationSelectionDialog(DebugUIPlugin.getShell());
if(configurations != null) {
lsd.setInput(configurations);
}
if(lsd.open() == IDialogConstants.OK_ID) {
ILaunchConfiguration config = (ILaunchConfiguration) lsd.getResult()[0];
DebugUITools.launch(config, mode);
return true;
}
return false;
}
/**
* Presents a selection dialog to the user to pick a launch shortcut
* @param resource the resource context
* @param mode the mode
* @return true if something was launched, false otherwise
*/
protected boolean showShortcutSelectionDialog(IResource resource, List shortcuts, String mode) {
LaunchShortcutSelectionDialog dialog = new LaunchShortcutSelectionDialog(resource, mode);
if(shortcuts != null) {
dialog.setInput(shortcuts);
}
if (dialog.open() == Window.OK) {
Object[] result = dialog.getResult();
if(result.length > 0) {
LaunchShortcutExtension method = (LaunchShortcutExtension) result[0];
if(method != null) {
method.launch((resource == null ? new StructuredSelection() : new StructuredSelection(resource)), mode);
return true;
}
}
}
return false;
}
/**
* Returns the launch configuration manager
* @return the launch configuration manager
*/
protected LaunchConfigurationManager getLaunchConfigurationManager() {
return DebugUIPlugin.getDefault().getLaunchConfigurationManager();
}
}
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