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/*******************************************************************************
* Copyright (c) 2011, 2012 Tasktop Technologies.
* 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:
* Tasktop Technologies - initial API and implementation
*******************************************************************************/
package org.eclipse.mylyn.internal.tasks.index.ui;
import java.lang.reflect.Method;
import org.eclipse.jface.fieldassist.ContentProposalAdapter;
import org.eclipse.jface.fieldassist.IContentProposalProvider;
import org.eclipse.jface.fieldassist.TextContentAdapter;
import org.eclipse.jface.layout.GridLayoutFactory;
import org.eclipse.mylyn.internal.tasks.index.core.TaskListIndex;
import org.eclipse.mylyn.internal.tasks.ui.TasksUiPlugin;
import org.eclipse.mylyn.internal.tasks.ui.search.AbstractSearchHandler;
import org.eclipse.mylyn.tasks.core.data.AbstractTaskSchema.Field;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Text;
import org.eclipse.swt.widgets.TypedListener;
import org.eclipse.ui.dialogs.PatternFilter;
import org.eclipse.ui.fieldassist.ContentAssistCommandAdapter;
/**
* @author David Green
*/
public class IndexSearchHandler extends AbstractSearchHandler {
private IndexReference reference;
public IndexSearchHandler() {
reference = new IndexReference();
}
@Override
public Composite createSearchComposite(Composite parent) {
Composite container = new Composite(parent, SWT.NULL);
GridLayoutFactory.swtDefaults().applyTo(container);
final Button button = new Button(container, SWT.CHECK);
button.setText(Messages.IndexSearchHandler_summaryOnly);
button.setToolTipText(Messages.IndexSearchHandler_summaryOnly_tooltip);
button.setSelection(true);
button.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
Field newDefaultField = button.getSelection()
? TaskListIndex.FIELD_SUMMARY
: TaskListIndex.FIELD_CONTENT;
reference.index().setDefaultField(newDefaultField);
fireFilterChanged();
}
});
return container;
}
@Override
public PatternFilter createFilter() {
return new IndexedSubstringPatternFilter(reference.index());
}
@Override
public void adaptTextSearchControl(final Text textControl) {
// make room for content assist decoration
if (textControl.getParent().getLayout() instanceof GridLayout) {
((GridLayout) textControl.getParent().getLayout()).marginLeft = 6;
}
// delay execution of to avoid empty key-binding in tooltip: The problem is that the binding service hasn't been
// initialized when the decoration is created on startup.
textControl.getDisplay().asyncExec(new Runnable() {
public void run() {
if (!textControl.isDisposed()) {
adaptTextSearchControlInternal(textControl);
}
}
});
}
private void adaptTextSearchControlInternal(Text textControl) {
IContentProposalProvider proposalProvider = new ContentProposalProvider(TasksUiPlugin.getTaskList(), reference);
final ContentAssistCommandAdapter adapter = new ContentAssistCommandAdapter(textControl,
new TextContentAdapter(), proposalProvider, null, new char[0], true);
adapter.setProposalAcceptanceStyle(ContentProposalAdapter.PROPOSAL_REPLACE);
// FilteredTree registers a traverse listener that focuses the tree when ENTER is pressed. This
// causes focus to be lost when a content proposal is selected. To avoid transfer of focus the
// traverse listener registered by FilteredTree is skipped while content assist is being used.
Listener[] traverseListeners = textControl.getListeners(SWT.Traverse);
for (final Listener listener : traverseListeners) {
if (listener.getClass() == TypedListener.class) {
// replace listener with delegate that filters events
textControl.removeListener(SWT.Traverse, listener);
textControl.addListener(SWT.Traverse, new Listener() {
public void handleEvent(Event event) {
// TODO e3.6 replace with call to adapter.isProposalPopupOpen()
boolean popupOpen = false;
try {
Method method = ContentProposalAdapter.class.getDeclaredMethod("isProposalPopupOpen"); //$NON-NLS-1$
popupOpen = (Boolean) method.invoke(adapter);
} catch (Exception e) {
// ignore, Eclipse 3.5 does not support this API
}
if (!popupOpen) {
listener.handleEvent(event);
}
}
});
}
}
}
@Override
public void dispose() {
reference.dispose();
reference = null;
}
}
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