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/*******************************************************************************
* Copyright (c) 2000, 2008 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.search.internal.ui.text;
import java.util.HashMap;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IMarker;
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.ui.texteditor.ITextEditor;
import org.eclipse.search.internal.ui.SearchMessages;
import org.eclipse.search.internal.ui.SearchPlugin;
import org.eclipse.search.ui.NewSearchUI;
public class EditorOpener {
private IEditorReference fReusedEditor;
public IEditorPart open(IWorkbenchPage wbPage, IFile file, boolean activate) throws PartInitException {
if (NewSearchUI.reuseEditor())
return showWithReuse(file, wbPage, getEditorID(file), activate);
return showWithoutReuse(file, wbPage, getEditorID(file), activate);
}
public IEditorPart openAndSelect(IWorkbenchPage wbPage, IFile file, int offset, int length, boolean activate) throws PartInitException {
String editorId= null;
IEditorDescriptor desc = IDE.getEditorDescriptor(file, true, true);
if (desc == null || !desc.isInternal()) {
editorId= "org.eclipse.ui.DefaultTextEditor"; //$NON-NLS-1$
} else {
editorId= desc.getId();
}
IEditorPart editor;
if (NewSearchUI.reuseEditor()) {
editor= showWithReuse(file, wbPage, editorId, activate);
} else {
editor= showWithoutReuse(file, wbPage, editorId, activate);
}
if (editor instanceof ITextEditor) {
ITextEditor textEditor= (ITextEditor) editor;
textEditor.selectAndReveal(offset, length);
} else if (editor != null) {
showWithMarker(editor, file, offset, length);
}
return editor;
}
private IEditorPart showWithoutReuse(IFile file, IWorkbenchPage wbPage, String editorID, boolean activate) throws PartInitException {
return IDE.openEditor(wbPage, file, editorID, activate);
}
private String getEditorID(IFile file) throws PartInitException {
IEditorDescriptor desc = IDE.getEditorDescriptor(file, true, true);
if (desc == null)
return SearchPlugin.getDefault().getWorkbench().getEditorRegistry().findEditor(IEditorRegistry.SYSTEM_EXTERNAL_EDITOR_ID).getId();
return desc.getId();
}
private IEditorPart showWithReuse(IFile file, IWorkbenchPage page, String editorId, boolean activate) throws PartInitException {
IEditorInput input= new FileEditorInput(file);
IEditorPart editor= page.findEditor(input);
if (editor != null) {
page.bringToTop(editor);
if (activate) {
page.activate(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);
if (activate) {
page.activate(editor);
}
return editor;
}
}
}
}
editor= page.openEditor(input, editorId, activate);
if (editor instanceof IReusableEditor) {
IEditorReference reference= (IEditorReference) page.getReference(editor);
fReusedEditor= reference;
} else {
fReusedEditor= null;
}
return editor;
}
private void showWithMarker(IEditorPart editor, IFile file, int offset, int length) throws PartInitException {
IMarker marker= null;
try {
marker= file.createMarker(NewSearchUI.SEARCH_MARKER);
HashMap<String, Integer> attributes= new HashMap<>(4);
attributes.put(IMarker.CHAR_START, Integer.valueOf(offset));
attributes.put(IMarker.CHAR_END, Integer.valueOf(offset + length));
marker.setAttributes(attributes);
IDE.gotoMarker(editor, marker);
} catch (CoreException e) {
throw new PartInitException(SearchMessages.FileSearchPage_error_marker, e);
} finally {
if (marker != null)
try {
marker.delete();
} catch (CoreException e) {
// ignore
}
}
}
}
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