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package org.eclipse.debug.internal.ui;
/*
* (c) Copyright IBM Corp. 2000, 2001.
* All Rights Reserved.
*/
import java.util.Iterator;
import org.eclipse.core.runtime.MultiStatus;
import org.eclipse.debug.core.DebugException;
import org.eclipse.debug.core.IDebugStatusConstants;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.swt.custom.BusyIndicator;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.IWorkbenchWindowActionDelegate;
public abstract class ControlActionDelegate implements IWorkbenchWindowActionDelegate {
protected static final String ERROR= "error.";
protected static final String STATUS= "status";
protected IStructuredSelection fStructuredSelection;
/**
* It's crucial that delegate actions have a zero-arg constructor so that
* they can be reflected into existence when referenced in an action set
* in the plugin's plugin.xml file.
*/
public ControlActionDelegate() {
}
/**
* Not all ControlActionDelegates have an owner, only those that aren't
* specified as part of an action set in plugin.xml. For those delegates,
* that do have a ControlAction owner, this is the place to do any
* action specific initialization.
*/
public void initializeForOwner(ControlAction controlAction) {
}
/**
* Do the specific action using the current selection.
*/
public void run() {
final Iterator enum= fStructuredSelection.iterator();
String pluginId= DebugUIPlugin.getDefault().getDescriptor().getUniqueIdentifier();
final MultiStatus ms=
new MultiStatus(pluginId, IDebugStatusConstants.REQUEST_FAILED, DebugUIUtils.getResourceString(getPrefix() + STATUS), null);
BusyIndicator.showWhile(Display.getCurrent(), new Runnable() {
public void run() {
while (enum.hasNext()) {
Object element= enum.next();
if (isEnabledFor(element)) {
try {
doAction(element);
} catch (DebugException e) {
ms.merge(e.getStatus());
}
}
}
}
});
if (!ms.isOK()) {
DebugUIUtils.errorDialog(DebugUIPlugin.getActiveWorkbenchWindow().getShell(), getPrefix() + ERROR, ms);
}
}
/**
* @see IWorkbenchWindowActionDelegate
*/
public void dispose(){
}
/**
* @see IWorkbenchWindowActionDelegate
*/
public void init(IWorkbenchWindow window){
}
/**
* @see IActionDelegate
*/
public void run(IAction action){
run();
}
/**
* @see IActionDelegate
*/
public void selectionChanged(IAction action, ISelection selection){
if (selection instanceof IStructuredSelection) {
fStructuredSelection= (IStructuredSelection)selection;
action.setEnabled(getEnableStateForSelection(fStructuredSelection));
}
}
/**
* Return whether the action should be enabled or not based on the given selection.
*/
public boolean getEnableStateForSelection(IStructuredSelection selection) {
if (selection.size() == 0) {
return false;
}
Iterator enum= selection.iterator();
int count= 0;
while (enum.hasNext()) {
count++;
if (count > 1 && enableForMultiSelection()) {
return false;
}
Object element= enum.next();
if (!isEnabledFor(element)) {
return false;
}
}
return true;
}
/**
* Returns whether this action should be enabled if there is
* multi selection.
*/
protected boolean enableForMultiSelection() {
return true;
}
/**
* Does the specific action of this action to the process.
*/
protected abstract void doAction(Object element) throws DebugException;
/**
* Returns the resource bundle prefix for this action
*/
protected abstract String getPrefix();
/**
* Returns whether this action will work for the given element
*/
public abstract boolean isEnabledFor(Object element);
/**
* Returns this action's help context id
*/
protected abstract String getHelpContextId();
}
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