/**
* Copyright 2016 Red Hat, Inc. and/or its affiliates.
*
* Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
*
* 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 org.dashbuilder.common.client.editor.list;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.function.Supplier;
import java.util.stream.Collectors;
import javax.annotation.PostConstruct;
import javax.enterprise.context.Dependent;
import javax.enterprise.event.Event;
import javax.inject.Inject;
import com.google.gwt.editor.client.EditorError;
import com.google.gwt.safehtml.shared.SafeHtml;
import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
import com.google.gwt.user.client.ui.IsWidget;
import com.google.gwt.user.client.ui.Widget;
import org.dashbuilder.common.client.editor.LeafAttributeEditor;
import org.dashbuilder.common.client.event.ValueChangeEvent;
import org.dashbuilder.dataset.def.SQLDataSourceDef;
import org.gwtbootstrap3.client.ui.constants.Placement;
import org.uberfire.client.mvp.UberView;
import org.uberfire.ext.widgets.common.client.dropdown.LiveSearchCallback;
import org.uberfire.ext.widgets.common.client.dropdown.LiveSearchDropDown;
import org.uberfire.ext.widgets.common.client.dropdown.LiveSearchService;
@Dependent
public class DropDownEditor implements IsWidget, LeafAttributeEditor<String> {
public interface View extends UberView<DropDownEditor> {
View addHelpContent(final String title, final String content, final Placement placement);
View setDropDown(LiveSearchDropDown dropDown);
View showError(final SafeHtml message);
View clearError();
}
public class Entry {
private String value;
private String hint;
public Entry(String value, String hint) {
this.value = value;
this.hint = hint;
}
public String getValue() {
return value;
}
public String getHint() {
return hint;
}
}
public View view;
LiveSearchDropDown dropDown;
Event<org.dashbuilder.common.client.event.ValueChangeEvent<String>> valueChangeEvent;
Collection<Entry> entries = new ArrayList<>();
String selectorHint;
String value;
@Inject
public DropDownEditor(final View view,
final LiveSearchDropDown dropDown,
final Event<org.dashbuilder.common.client.event.ValueChangeEvent<String>> valueChangeEvent) {
this.view = view;
this.dropDown = dropDown;
this.valueChangeEvent = valueChangeEvent;
}
@PostConstruct
public void init() {
view.init(this);
view.setDropDown(dropDown);
dropDown.setSearchEnabled(false);
dropDown.setSearchService(this::getDropDownEntries);
dropDown.setOnChange(this::onEntrySelected);
}
@Override
public Widget asWidget() {
return view.asWidget();
}
public void getDropDownEntries(String pattern, int maxResults, LiveSearchCallback callback) {
callback.afterSearch(entries.stream()
.map(Entry::getHint)
.filter(v -> v.contains(pattern))
.collect(Collectors.toList()));
}
public void onEntrySelected() {
String oldValue = value;
value = getSelectedValue();
valueChangeEvent.fire(new ValueChangeEvent<>(this, oldValue, value));
}
public String getSelectedValue() {
String hint = dropDown.getSelectedItem();
Entry entry = getEntryByHint(hint);
return entry.getValue();
}
private Entry getEntryByHint(String hint) {
for (Entry entry : entries) {
if (entry.getHint().equals(hint)) {
return entry;
}
}
return null;
}
private Entry getEntryByValue(String value) {
for (Entry entry : entries) {
if (entry.getValue().equals(value)) {
return entry;
}
}
return null;
}
public void setSelectHint(String hint) {
selectorHint = hint;
dropDown.setSelectorHint(hint);
}
public Entry newEntry(final String value, String hint) {
return new Entry(value, hint);
}
public void setEntries(final Collection<Entry> entries) {
this.entries.clear();
if (entries != null) {
for (Entry entry : entries) {
this.entries.add(entry);
if (entry.getValue().equals(value)) {
this.dropDown.setSelectedItem(entry.getHint());
}
}
}
}
public void addHelpContent(final String title, final String content, final Placement placement) {
view.addHelpContent(title, content, placement);
}
public void clear() {
this.entries.clear();
this.value = null;
this.dropDown.clear();
}
/*************************************************************
** GWT EDITOR CONTRACT METHODS **
*************************************************************/
@Override
public void showErrors(final List<EditorError> errors) {
StringBuilder sb = new StringBuilder();
for (EditorError error : errors) {
if (error.getEditor().equals(this)) {
sb.append("\n").append(error.getMessage());
}
}
boolean hasErrors = sb.length() > 0;
if (!hasErrors) {
view.clearError();
return;
}
// Show the errors.
view.showError(new SafeHtmlBuilder().appendEscaped(sb.substring(1)).toSafeHtml());
}
@Override
public String getValue() {
return value;
}
@Override
public void setValue(final String value) {
this.value = value;
Entry entry = getEntryByValue(value);
if (entry != null) {
this.dropDown.setSelectedItem(entry.getHint());
} else {
this.dropDown.setSelectedItem(selectorHint);
}
}
}