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/*******************************************************************************
* Copyright (c) 2005 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.internal.search;
import java.util.Iterator;
import java.util.List;
import org.eclipse.core.resources.IFile;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.ITextSelection;
import org.eclipse.jface.text.ITypedRegion;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.swt.widgets.Event;
import org.eclipse.ui.IActionDelegate2;
import org.eclipse.ui.IEditorActionDelegate;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IFileEditorInput;
import org.eclipse.ui.IViewActionDelegate;
import org.eclipse.ui.IViewPart;
import org.eclipse.ui.texteditor.ITextEditor;
import org.eclipse.wst.sse.ui.internal.SSEUIMessages;
import org.eclipse.wst.sse.ui.internal.util.PlatformStatusLineUtil;
/**
* Performs the appropriate FindOccurrencesProcessor action call based on
* selection. Clients can add processors for different partitions via
* <code>getProcessors</code>
*
*/
abstract public class FindOccurrencesActionDelegate implements IEditorActionDelegate, IActionDelegate2, IViewActionDelegate {
private IEditorPart fEditor;
public void setActiveEditor(IAction action, IEditorPart targetEditor) {
fEditor = targetEditor;
}
public void dispose() {
// nulling out just in case
fEditor = null;
}
public void init(IAction action) {
if (action != null) {
action.setText(SSEUIMessages.FindOccurrences_label);
}
}
public void runWithEvent(IAction action, Event event) {
run(action);
}
public void run(IAction action) {
boolean okay = false;
if (fEditor instanceof ITextEditor) {
ITextEditor textEditor = (ITextEditor) fEditor;
IDocument document = textEditor.getDocumentProvider().getDocument(textEditor.getEditorInput());
if (document != null) {
ITextSelection textSelection = getTextSelection(textEditor);
FindOccurrencesProcessor findOccurrenceProcessor = getProcessorForCurrentSelection(document, textSelection);
if (findOccurrenceProcessor != null) {
if (textEditor.getEditorInput() instanceof IFileEditorInput) {
IFile file = ((IFileEditorInput) textEditor.getEditorInput()).getFile();
okay = findOccurrenceProcessor.findOccurrences(document, textSelection, file);
}
}
}
}
if (okay) {
// clear status message
PlatformStatusLineUtil.clearStatusLine();
}
else {
String errorMessage = SSEUIMessages.FindOccurrencesActionProvider_0; //$NON-NLS-1$
PlatformStatusLineUtil.displayErrorMessage(errorMessage);
PlatformStatusLineUtil.addOneTimeClearListener();
}
}
public void init(IViewPart view) {
// do nothing
}
public void selectionChanged(IAction action, ISelection selection) {
// clear status message
PlatformStatusLineUtil.clearStatusLine();
}
/**
* Get the appropriate find occurrences processor
*
* @param document -
* assumes not null
* @param textSelection
* @return
*/
private FindOccurrencesProcessor getProcessorForCurrentSelection(IDocument document, ITextSelection textSelection) {
// check if we have an action that's enabled on the current partition
ITypedRegion tr = getPartition(document, textSelection);
String partition = tr != null ? tr.getType() : ""; //$NON-NLS-1$
Iterator it = getProcessors().iterator();
FindOccurrencesProcessor action = null;
while (it.hasNext()) {
action = (FindOccurrencesProcessor) it.next();
// we just choose the first action that can handle the partition
if (action.enabledForParitition(partition))
return action;
}
return null;
}
private ITypedRegion getPartition(IDocument document, ITextSelection textSelection) {
ITypedRegion region = null;
if (textSelection != null) {
try {
region = document.getPartition(textSelection.getOffset());
}
catch (BadLocationException e) {
region = null;
}
}
return region;
}
private ITextSelection getTextSelection(ITextEditor textEditor) {
ITextSelection textSelection = null;
ISelection selection = textEditor.getSelectionProvider().getSelection();
if (selection instanceof ITextSelection && !selection.isEmpty()) {
textSelection = (ITextSelection) selection;
}
return textSelection;
}
abstract protected List getProcessors();
}
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