/*
* Copyright (c) 2012, the Dart project authors.
*
* Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the License at
*
* http://www.eclipse.org/legal/epl-v10.html
*
* Unless required by applicable law or agreed to in writing, software distributed under the License
* is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
* or implied. See the License for the specific language governing permissions and limitations under
* the License.
*/
package com.google.dart.tools.search2.internal.ui;
import com.google.dart.tools.search.internal.ui.SearchPlugin;
import com.google.dart.tools.search.internal.ui.util.SWTUtil;
import com.google.dart.tools.search.ui.ISearchQuery;
import com.google.dart.tools.search.ui.ISearchResult;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.IDialogSettings;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.viewers.ArrayContentProvider;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.MouseAdapter;
import org.eclipse.swt.events.MouseEvent;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
import org.eclipse.ui.dialogs.SelectionDialog;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
/**
* Dialog that shows a list of items with icon and label.
*/
public class SearchHistorySelectionDialog extends SelectionDialog {
private static final class SearchesLabelProvider extends LabelProvider {
private ArrayList<Image> fImages = new ArrayList<Image>();
@Override
public void dispose() {
Iterator<Image> iter = fImages.iterator();
while (iter.hasNext()) {
iter.next().dispose();
}
fImages = null;
}
@Override
public Image getImage(Object element) {
ImageDescriptor imageDescriptor = ((ISearchResult) element).getImageDescriptor();
if (imageDescriptor == null) {
return null;
}
Image image = imageDescriptor.createImage();
fImages.add(image);
return image;
}
@Override
public String getText(Object element) {
return ((ISearchResult) element).getLabel();
}
}
private static final int REMOVE_ID = IDialogConstants.CLIENT_ID + 1;
private static final int WIDTH_IN_CHARACTERS = 55;
private List<ISearchResult> fInput;
private final List<Object> fRemovedEntries;
private TableViewer fViewer;
private Button fRemoveButton;
public SearchHistorySelectionDialog(Shell parent, List<ISearchResult> input) {
super(parent);
setTitle(SearchMessages.SearchesDialog_title);
setMessage(SearchMessages.SearchesDialog_message);
fInput = input;
fRemovedEntries = new ArrayList<Object>();
setHelpAvailable(false);
}
@Override
public void create() {
super.create();
List<?> initialSelection = getInitialElementSelections();
if (initialSelection != null) {
fViewer.setSelection(new StructuredSelection(initialSelection));
}
validateDialogState();
}
@Override
protected void buttonPressed(int buttonId) {
if (buttonId == REMOVE_ID) {
IStructuredSelection selection = (IStructuredSelection) fViewer.getSelection();
Iterator<?> searchResults = selection.iterator();
while (searchResults.hasNext()) {
Object curr = searchResults.next();
fRemovedEntries.add(curr);
fInput.remove(curr);
fViewer.remove(curr);
}
if (fViewer.getSelection().isEmpty() && !fInput.isEmpty()) {
fViewer.setSelection(new StructuredSelection(fInput.get(0)));
}
return;
}
super.buttonPressed(buttonId);
}
@Override
protected void createButtonsForButtonBar(Composite parent) {
createButton(parent, IDialogConstants.OK_ID, IDialogConstants.OPEN_LABEL, true);
createButton(parent, IDialogConstants.CANCEL_ID, IDialogConstants.CANCEL_LABEL, false);
}
@Override
protected Control createDialogArea(Composite container) {
Composite ancestor = (Composite) super.createDialogArea(container);
createMessageArea(ancestor);
Composite parent = new Composite(ancestor, SWT.NONE);
GridLayout layout = new GridLayout();
layout.numColumns = 2;
layout.marginHeight = 0;
layout.marginWidth = 0;
parent.setLayout(layout);
parent.setLayoutData(new GridData(GridData.FILL_BOTH));
fViewer = new TableViewer(parent, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER
| SWT.FULL_SELECTION);
fViewer.setContentProvider(new ArrayContentProvider());
final Table table = fViewer.getTable();
table.addMouseListener(new MouseAdapter() {
@Override
public void mouseDoubleClick(MouseEvent e) {
okPressed();
}
});
fViewer.setLabelProvider(new SearchesLabelProvider());
GridData gd = new GridData(GridData.FILL_BOTH);
gd.heightHint = convertHeightInCharsToPixels(15);
gd.widthHint = convertWidthInCharsToPixels(WIDTH_IN_CHARACTERS);
table.setLayoutData(gd);
fRemoveButton = new Button(parent, SWT.PUSH);
fRemoveButton.setText(SearchMessages.SearchesDialog_remove_label);
fRemoveButton.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent event) {
buttonPressed(REMOVE_ID);
}
});
fRemoveButton.setLayoutData(new GridData(GridData.BEGINNING, GridData.BEGINNING, false, false));
SWTUtil.setButtonDimensionHint(fRemoveButton);
fViewer.addSelectionChangedListener(new ISelectionChangedListener() {
@Override
public void selectionChanged(SelectionChangedEvent event) {
validateDialogState();
}
});
applyDialogFont(ancestor);
// set input & selections last, so all the widgets are created.
fViewer.setInput(fInput);
fViewer.getTable().setFocus();
return ancestor;
}
@Override
protected Label createMessageArea(Composite composite) {
Composite parent = new Composite(composite, SWT.NONE);
GridLayout layout = new GridLayout();
layout.numColumns = 2;
layout.marginHeight = 0;
layout.marginWidth = 0;
parent.setLayout(layout);
parent.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
Label label = new Label(parent, SWT.WRAP);
label.setText(getMessage());
GridData gd = new GridData(GridData.FILL_HORIZONTAL);
//gd.widthHint= convertWidthInCharsToPixels(WIDTH_IN_CHARACTERS);
label.setLayoutData(gd);
applyDialogFont(label);
return label;
}
@Override
protected IDialogSettings getDialogBoundsSettings() {
return SearchPlugin.getDefault().getDialogSettingsSection(
"DialogBounds_SearchHistorySelectionDialog"); //$NON-NLS-1$
}
@Override
protected int getDialogBoundsStrategy() {
return DIALOG_PERSISTSIZE;
}
@Override
protected void okPressed() {
// Build a list of selected children.
ISelection selection = fViewer.getSelection();
if (selection instanceof IStructuredSelection) {
setResult(((IStructuredSelection) fViewer.getSelection()).toList());
}
// remove queries
for (Iterator<Object> iter = fRemovedEntries.iterator(); iter.hasNext();) {
ISearchResult result = (ISearchResult) iter.next();
ISearchQuery query = result.getQuery();
if (query != null) { // must not be null: invalid implementation of a search query
InternalSearchUI.getInstance().removeQuery(query);
}
}
super.okPressed();
}
protected final void validateDialogState() {
IStructuredSelection sel = (IStructuredSelection) fViewer.getSelection();
int elementsSelected = sel.toList().size();
fRemoveButton.setEnabled(elementsSelected > 0);
Button okButton = getOkButton();
if (okButton != null) {
okButton.setEnabled(elementsSelected == 1);
}
Button openInNewButton = getButton(IDialogConstants.OPEN_ID);
if (openInNewButton != null) {
openInNewButton.setEnabled(elementsSelected == 1);
}
}
}