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CHE-6813: Add search filter to Git branch dialogs (#7433)
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ide/commons-gwt/src/main/java/org/eclipse/che/ide/ui/list/FilterableSimpleList.java
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| /** | ||
| * Copyright (c) 2012-2017 Red Hat, Inc. 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 | ||
| * | ||
| * <p>Contributors: Red Hat, Inc. - initial API and implementation | ||
| */ | ||
| package org.eclipse.che.ide.ui.list; | ||
|
|
||
| import static com.google.gwt.event.dom.client.KeyCodes.KEY_BACKSPACE; | ||
| import static com.google.gwt.event.dom.client.KeyCodes.KEY_ESCAPE; | ||
|
|
||
| import com.google.gwt.user.client.ui.FocusPanel; | ||
| import java.util.Map; | ||
| import java.util.stream.Collectors; | ||
|
|
||
| /** | ||
| * A focus panel witch contain {@link SimpleList} widget. Supports filtering items according to | ||
| * typed from keyboard symbols. | ||
| */ | ||
| public class FilterableSimpleList<M> extends FocusPanel { | ||
| private Map<String, M> filterableItems; | ||
| private SimpleList<M> simpleList; | ||
| private StringBuilder filter; | ||
|
|
||
| public interface FilterChangedHandler { | ||
| /** Is called when search filter is changed */ | ||
| void onFilterChanged(String filter); | ||
| } | ||
|
|
||
| private FilterableSimpleList( | ||
| SimpleList.View view, | ||
| SimpleList.Css css, | ||
| SimpleList.ListItemRenderer<M> itemRenderer, | ||
| SimpleList.ListEventDelegate<M> eventDelegate, | ||
| FilterChangedHandler filterChangedHandler) { | ||
| super(); | ||
| simpleList = SimpleList.create(view, css, itemRenderer, eventDelegate); | ||
| this.getElement().setAttribute("style", "outline: 0"); | ||
|
|
||
| addKeyDownHandler( | ||
| keyDownEvent -> { | ||
| int keyCode = keyDownEvent.getNativeEvent().getKeyCode(); | ||
| if (keyCode == KEY_BACKSPACE) { | ||
| filter.deleteCharAt(filter.length() - 1); | ||
| filterChangedHandler.onFilterChanged(filter.toString()); | ||
| } else if (keyCode == KEY_ESCAPE && !filter.toString().isEmpty()) { | ||
| clearFilter(); | ||
| keyDownEvent.stopPropagation(); | ||
| filterChangedHandler.onFilterChanged(""); | ||
| } else { | ||
| return; | ||
| } | ||
| doFilter(); | ||
| }); | ||
|
|
||
| addKeyPressHandler( | ||
| keyPressEvent -> { | ||
| filter.append(String.valueOf(keyPressEvent.getCharCode())); | ||
| filterChangedHandler.onFilterChanged(filter.toString()); | ||
| doFilter(); | ||
| }); | ||
|
|
||
| add(simpleList); | ||
| filter = new StringBuilder(); | ||
| } | ||
|
|
||
| public static <M> FilterableSimpleList<M> create( | ||
| SimpleList.View view, | ||
| SimpleList.Css simpleListCss, | ||
| SimpleList.ListItemRenderer<M> itemRenderer, | ||
| SimpleList.ListEventDelegate<M> eventDelegate, | ||
| FilterChangedHandler filterChangedHandler) { | ||
| return new FilterableSimpleList<>( | ||
| view, simpleListCss, itemRenderer, eventDelegate, filterChangedHandler); | ||
| } | ||
|
|
||
| /** | ||
| * Render the list with given items. | ||
| * | ||
| * @param filterableItems map with filterable value as a key and the item as a value | ||
| */ | ||
| public void render(Map<String, M> filterableItems) { | ||
| this.filterableItems = filterableItems; | ||
| doFilter(); | ||
| } | ||
|
|
||
| /** Reset the filter. */ | ||
| public void clearFilter() { | ||
| filter.delete(0, filter.length() + 1); | ||
| } | ||
|
|
||
| /** Returns the selection model from parent {@link SimpleList} widget. */ | ||
| public HasSelection<M> getSelectionModel() { | ||
| return simpleList.getSelectionModel(); | ||
| } | ||
|
|
||
| private void doFilter() { | ||
| simpleList.render( | ||
| filterableItems | ||
| .keySet() | ||
| .stream() | ||
| .filter(name -> name.startsWith(filter.toString())) | ||
| .map(name -> filterableItems.get(name)) | ||
| .collect(Collectors.toList())); | ||
| } | ||
| } |
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