/*******************************************************************************
* Copyright (c) 2000, 2008 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.jsdt.internal.ui.search;
import org.eclipse.core.resources.IFile;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.search.ui.NewSearchUI;
import org.eclipse.search.ui.text.Match;
import org.eclipse.ui.IEditorDescriptor;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IEditorReference;
import org.eclipse.ui.IEditorRegistry;
import org.eclipse.ui.IReusableEditor;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.ide.IDE;
import org.eclipse.ui.part.FileEditorInput;
import org.eclipse.wst.jsdt.core.IClassFile;
import org.eclipse.wst.jsdt.core.IJavaScriptUnit;
import org.eclipse.wst.jsdt.core.IJavaScriptElement;
import org.eclipse.wst.jsdt.core.IMember;
import org.eclipse.wst.jsdt.core.JavaScriptModelException;
import org.eclipse.wst.jsdt.internal.ui.JavaScriptPlugin;
import org.eclipse.wst.jsdt.internal.ui.javaeditor.EditorUtility;
import org.eclipse.wst.jsdt.internal.ui.javaeditor.InternalClassFileEditorInput;
import org.eclipse.wst.jsdt.ui.JavaScriptUI;
public class JavaSearchEditorOpener {
private IEditorReference fReusedEditor;
public IEditorPart openElement(Object element) throws PartInitException, JavaScriptModelException {
IWorkbenchPage wbPage= JavaScriptPlugin.getActivePage();
if (NewSearchUI.reuseEditor())
return showWithReuse(element, wbPage);
else
return showWithoutReuse(element, wbPage);
}
public IEditorPart openMatch(Match match) throws PartInitException, JavaScriptModelException {
Object element= getElementToOpen(match);
return openElement(element);
}
protected Object getElementToOpen(Match match) {
return match.getElement();
}
private IEditorPart showWithoutReuse(Object element, IWorkbenchPage wbPage) throws PartInitException, JavaScriptModelException {
return EditorUtility.openInEditor(element, false);
}
private IEditorPart showWithReuse(Object element, IWorkbenchPage wbPage) throws JavaScriptModelException, PartInitException {
IFile file= getFile(element);
if (file != null) {
String editorID= getEditorID(file);
return showInEditor(wbPage, new FileEditorInput(file), editorID);
} else {
IClassFile cf= getClassFile(element);
if (cf != null)
return showInEditor(wbPage, new InternalClassFileEditorInput(cf), JavaScriptUI.ID_CF_EDITOR);
}
return null;
}
private IFile getFile(Object element) throws JavaScriptModelException {
if (element instanceof IFile)
return (IFile) element;
if (element instanceof IJavaScriptElement) {
IJavaScriptElement jElement= (IJavaScriptElement) element;
IJavaScriptUnit cu= (IJavaScriptUnit) jElement.getAncestor(IJavaScriptElement.JAVASCRIPT_UNIT);
if (cu != null) {
return (IFile) cu.getCorrespondingResource();
}
IClassFile cf= (IClassFile) jElement.getAncestor(IJavaScriptElement.CLASS_FILE);
if (cf != null)
return (IFile) cf.getCorrespondingResource();
}
return null;
}
private String getEditorID(IFile file) throws PartInitException {
IEditorDescriptor desc= IDE.getEditorDescriptor(file);
if (desc == null)
return JavaScriptPlugin.getDefault().getWorkbench().getEditorRegistry().findEditor(IEditorRegistry.SYSTEM_EXTERNAL_EDITOR_ID).getId();
else
return desc.getId();
}
private IEditorPart showInEditor(IWorkbenchPage page, IEditorInput input, String editorId) {
IEditorPart editor= page.findEditor(input);
if (editor != null) {
page.bringToTop(editor);
return editor;
}
IEditorReference reusedEditorRef= fReusedEditor;
if (reusedEditorRef != null) {
boolean isOpen= reusedEditorRef.getEditor(false) != null;
boolean canBeReused= isOpen && !reusedEditorRef.isDirty() && !reusedEditorRef.isPinned();
if (canBeReused) {
boolean showsSameInputType= reusedEditorRef.getId().equals(editorId);
if (!showsSameInputType) {
page.closeEditors(new IEditorReference[] { reusedEditorRef }, false);
fReusedEditor= null;
} else {
editor= reusedEditorRef.getEditor(true);
if (editor instanceof IReusableEditor) {
((IReusableEditor) editor).setInput(input);
page.bringToTop(editor);
return editor;
}
}
}
}
// could not reuse
try {
editor= page.openEditor(input, editorId, false);
if (editor instanceof IReusableEditor) {
IEditorReference reference= (IEditorReference) page.getReference(editor);
fReusedEditor= reference;
} else {
fReusedEditor= null;
}
return editor;
} catch (PartInitException ex) {
MessageDialog.openError(JavaScriptPlugin.getActiveWorkbenchShell(), SearchMessages.Search_Error_openEditor_title, SearchMessages.Search_Error_openEditor_message);
return null;
}
}
private IClassFile getClassFile(Object element) {
if (!(element instanceof IJavaScriptElement))
return null;
if (element instanceof IClassFile)
return (IClassFile) element;
IJavaScriptElement jElement= (IJavaScriptElement) element;
if (jElement instanceof IMember)
return ((IMember) jElement).getClassFile();
return null;
}
}