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/*******************************************************************************
* Copyright (c) 2000, 2013 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.stringsubstitution;
import java.util.Iterator;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.Platform;
import org.eclipse.debug.internal.ui.DebugUIPlugin;
import org.eclipse.jface.text.ITextSelection;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionProvider;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IEditorSite;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.IWorkbenchPartSite;
import org.eclipse.ui.IWorkbenchSite;
import org.eclipse.ui.IWorkbenchWindow;
/**
* Maintains the context used to expand variables. The context is based on
* the selected resource.
*/
public class SelectedResourceManager {
// singleton
private static SelectedResourceManager fgDefault;
/**
* Returns the singleton resource selection manager
*
* @return VariableContextManager
*/
public static SelectedResourceManager getDefault() {
if (fgDefault == null) {
fgDefault = new SelectedResourceManager();
}
return fgDefault;
}
/**
* Returns the selection from the currently active part. If the active part is an
* editor a new selection of the editor part is made, otherwise the selection
* from the parts' selection provider is returned if it is a structured selection. Otherwise
* and empty selection is returned, never <code>null</code>.
* <br>
* <p>
* This method is intended to be called from the UI thread.
* </p>
*
* @return the <code>IStructuredSelection</code> from the current parts' selection provider, or
* a new <code>IStructuredSelection</code> of the current editor part, depending on what the current part
* is.
*
* @since 3.3
*/
public IStructuredSelection getCurrentSelection() {
if(DebugUIPlugin.getStandardDisplay().getThread().equals(Thread.currentThread())) {
return getCurrentSelection0();
}
else {
final IStructuredSelection[] selection = new IStructuredSelection[1];
DebugUIPlugin.getStandardDisplay().syncExec(new Runnable() {
@Override
public void run() {
selection[0] = getCurrentSelection0();
}
});
return selection[0];
}
}
/**
* Underlying implementation of <code>getCurrentSelection</code>
* @return the current selection
*
* @since 3.4
*/
private IStructuredSelection getCurrentSelection0() {
IWorkbenchWindow window = DebugUIPlugin.getActiveWorkbenchWindow();
if(window != null) {
IWorkbenchPage page = window.getActivePage();
if(page != null) {
IWorkbenchPart part = page.getActivePart();
if(part instanceof IEditorPart) {
return new StructuredSelection(part);
}
else if(part != null) {
IWorkbenchSite site = part.getSite();
if(site != null) {
ISelectionProvider provider = site.getSelectionProvider();
if(provider != null) {
ISelection selection = provider.getSelection();
if(selection instanceof IStructuredSelection) {
return (IStructuredSelection) provider.getSelection();
}
}
}
}
}
}
return StructuredSelection.EMPTY;
}
/**
* Returns the currently selected resource in the active workbench window,
* or <code>null</code> if none. If an editor is active, the resource adapter
* associated with the editor is returned.
*
* @return selected resource or <code>null</code>
*/
public IResource getSelectedResource() {
if(DebugUIPlugin.getStandardDisplay().getThread().equals(Thread.currentThread())) {
return getSelectedResource0();
}
else {
final IResource[] resource = new IResource[1];
DebugUIPlugin.getStandardDisplay().syncExec(new Runnable() {
@Override
public void run() {
resource[0] = getSelectedResource0();
}
});
return resource[0];
}
}
/**
* Returns the currently selected resource from the active part, or <code>null</code> if one cannot be
* resolved.
* @return the currently selected <code>IResource</code>, or <code>null</code> if none.
* @since 3.3
*/
protected IResource getSelectedResource0() {
IWorkbenchWindow window = DebugUIPlugin.getActiveWorkbenchWindow();
IResource resource = null;
if(window != null) {
IWorkbenchPage page = window.getActivePage();
if(page != null) {
IWorkbenchPart part = page.getActivePart();
if(part instanceof IEditorPart) {
IEditorPart epart = (IEditorPart) part;
resource = epart.getEditorInput().getAdapter(IResource.class);
}
else if(part != null) {
IWorkbenchPartSite site = part.getSite();
if(site != null) {
ISelectionProvider provider = site.getSelectionProvider();
if(provider != null) {
ISelection selection = provider.getSelection();
if(selection instanceof IStructuredSelection) {
IStructuredSelection ss = (IStructuredSelection) selection;
if(!ss.isEmpty()) {
Iterator<?> iterator = ss.iterator();
while (iterator.hasNext() && resource == null) {
Object next = iterator.next();
resource = Platform.getAdapterManager().getAdapter(next, IResource.class);
}
}
}
}
}
}
}
}
return resource;
}
/**
* Returns the current text selection as a <code>String</code>, or <code>null</code> if
* none.
*
* @return the current text selection as a <code>String</code> or <code>null</code>
*/
public String getSelectedText() {
if(DebugUIPlugin.getStandardDisplay().getThread().equals(Thread.currentThread())) {
return getSelectedText0();
}
else {
final String[] text = new String[1];
DebugUIPlugin.getStandardDisplay().syncExec(new Runnable() {
@Override
public void run() {
text[0] = getSelectedText0();
}
});
return text[0];
}
}
/**
* Returns the selected text from the most currently active editor. The editor does not have to
* have focus at the time this method is called.
* @return the currently selected text in the most recent active editor.
*
* @since 3.3
*/
protected String getSelectedText0() {
IWorkbenchWindow window = DebugUIPlugin.getActiveWorkbenchWindow();
if(window != null) {
IWorkbenchPage page = window.getActivePage();
if(page != null) {
IEditorPart epart = page.getActiveEditor();
if(epart != null) {
IEditorSite esite = epart.getEditorSite();
if(esite != null) {
ISelectionProvider sprovider = esite.getSelectionProvider();
if(sprovider != null) {
ISelection selection = sprovider.getSelection();
if(selection instanceof ITextSelection) {
return ((ITextSelection)selection).getText();
}
}
}
}
}
}
return null;
}
/**
* Returns the active workbench window, or <code>null</code> if none.
*
* @return the active workbench window, or <code>null</code> if none
* @since 3.2
*/
public IWorkbenchWindow getActiveWindow() {
if(DebugUIPlugin.getStandardDisplay().getThread().equals(Thread.currentThread())) {
return DebugUIPlugin.getActiveWorkbenchWindow();
}
else {
final IWorkbenchWindow[] window = new IWorkbenchWindow[1];
DebugUIPlugin.getStandardDisplay().syncExec(new Runnable() {
@Override
public void run() {
window[0] = DebugUIPlugin.getActiveWorkbenchWindow();
}
});
return window[0];
}
}
}
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