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/*******************************************************************************
* Copyright (c) 2014 BestSolution.at and others.
* 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:
* Tom Schindl<tom.schindl@bestsolution.at> - initial API and implementation
*******************************************************************************/
package org.eclipse.fx.ui.workbench.base.internal;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.Set;
import java.util.stream.Collectors;
import javax.annotation.PostConstruct;
import javax.inject.Inject;
import org.eclipse.core.commands.ParameterizedCommand;
import org.eclipse.e4.core.commands.ECommandService;
import org.eclipse.e4.core.commands.EHandlerService;
import org.eclipse.e4.core.contexts.ContextInjectionFactory;
import org.eclipse.e4.core.contexts.IEclipseContext;
import org.eclipse.e4.core.contexts.RunAndTrack;
import org.eclipse.e4.core.services.events.IEventBroker;
import org.eclipse.e4.ui.services.IServiceConstants;
import org.eclipse.e4.ui.workbench.UIEvents;
import org.eclipse.fx.core.ObjectSerializer;
import org.eclipse.fx.core.adapter.AdapterService;
import org.eclipse.fx.core.command.Command;
import org.eclipse.fx.core.command.CommandService;
import org.eclipse.fx.core.di.ScopedObjectFactory;
import org.eclipse.jdt.annotation.NonNull;
import org.eclipse.jdt.annotation.Nullable;
import javafx.beans.Observable;
import javafx.beans.property.ReadOnlyBooleanProperty;
import javafx.beans.property.ReadOnlyBooleanWrapper;
import javafx.collections.FXCollections;
import javafx.collections.ObservableMap;
/**
* A command service implementation
*
* @since 1.2
*/
@SuppressWarnings("restriction")
public class CommandServiceImpl implements CommandService {
@NonNull
private final ECommandService commandService;
@NonNull
private final EHandlerService handlerService;
@NonNull
private final IEclipseContext context;
@NonNull
private final ObjectSerializer serializer;
@NonNull
private final AdapterService adapterService;
/**
* Create a new instance
*
* @param commandService
* command service
* @param handlerService
* handler service
* @param context
* the context
*/
@Inject
public CommandServiceImpl(@NonNull ECommandService commandService, @NonNull EHandlerService handlerService, @NonNull IEclipseContext context,@NonNull ObjectSerializer serializer, @NonNull AdapterService adapterService) {
this.commandService = commandService;
this.handlerService = handlerService;
this.context = context;
this.serializer = serializer;
this.adapterService = adapterService;
}
@Override
public boolean exists(@NonNull String commandId) {
return this.commandService.getCommand(commandId) != null;
}
@Override
public boolean canExecute(@NonNull String commandId, @NonNull Map<@NonNull String, @Nullable Object> parameters) {
ParameterizedCommand cmd = this.commandService.createCommand(commandId, mapToString(this.adapterService,this.serializer,parameters));
return this.handlerService.canExecute(cmd);
}
@SuppressWarnings({ "unchecked" })
@Override
public <O> Optional<O> execute(@NonNull String commandId, @NonNull Map<@NonNull String, @Nullable Object> parameters) {
ParameterizedCommand cmd = this.commandService.createCommand(commandId, mapToString(this.adapterService,this.serializer,parameters));
return Optional.ofNullable((O) this.handlerService.executeHandler(cmd));
}
@SuppressWarnings("null")
private static Map<@NonNull String, @Nullable Object> mapToString(@NonNull AdapterService adapterService, @NonNull ObjectSerializer serializer, Map<@NonNull String, @Nullable Object> map) {
Map<@NonNull String, @Nullable Object> rv = new HashMap<>(map);
rv.putAll(rv.entrySet()
.stream()
.filter( e -> e.getValue() != null)
.filter( e -> !(e.getValue() instanceof String))
.filter( e -> adapterService.canAdapt(e.getValue(), String.class))
.collect(Collectors.toMap( e -> e.getKey(), e -> adapterService.adapt(e.getValue(), String.class))));
rv.putAll(rv.entrySet().stream()
.filter( e -> e.getValue() != null)
.filter( e -> !(e.getValue() instanceof String))
.collect(Collectors.toMap( e -> e.getKey(), e -> {
if( e.getValue() instanceof List<?> || e.getValue() instanceof Set<?> ) {
Collection<Object> c = (Collection<Object>) e.getValue();
if( c == null ) {
return null;
}
if( c.isEmpty() ) {
return serializer.serializeCollection(c, Object.class);
} else {
Class<Object> t = (Class<Object>) c.iterator().next().getClass();
return serializer.serializeCollection(c, t);
}
} else {
return serializer.serialize(e.getValue());
}
})));
return rv;
}
@Override
public <O> Optional<Command<O>> createCommand(@NonNull String commandId) {
org.eclipse.core.commands.Command command = this.commandService.getCommand(commandId);
if (command == null || !command.isDefined()) {
return Optional.empty();
}
CommandImpl<O> c = new CommandImpl<O>(commandId, this.context);
ContextInjectionFactory.inject(c, this.context);
return Optional.of(c);
}
static class CommandImpl<O> implements Command<O> {
private final String commandId;
private CommandService commandService;
private final IEclipseContext context;
private ReadOnlyBooleanWrapper enabledProperty = new ReadOnlyBooleanWrapper(this, "enabled"); //$NON-NLS-1$
private final ObservableMap<String, String> parameters = FXCollections.observableMap(new HashMap<>());
public CommandImpl(String commandId, IEclipseContext context) {
this.commandId = commandId;
this.context = context;
this.parameters.addListener((Observable o) -> {
recalculateState();
});
}
@PostConstruct
void init(IEventBroker eventBroker) {
eventBroker.subscribe(ScopedObjectFactory.KEYMODIFED_TOPIC, e -> recalculateState());
eventBroker.subscribe(UIEvents.REQUEST_ENABLEMENT_UPDATE_TOPIC, e -> {
recalculateState();
});
eventBroker.subscribe(UIEvents.Dirtyable.TOPIC_DIRTY, e -> recalculateState());
this.context.runAndTrack(new RunAndTrack() {
@Override
public boolean changed(IEclipseContext context) {
context.get(IServiceConstants.ACTIVE_CONTEXTS);
context.get(IServiceConstants.ACTIVE_SELECTION);
context.get(IServiceConstants.ACTIVE_PART);
recalculateState();
return true;
}
});
}
@Override
public void evaluate() {
recalculateState();
}
@Inject
public void setCommandService(CommandService commandService) {
this.commandService = commandService;
recalculateState();
}
@SuppressWarnings({ "unchecked", "null" })
void recalculateState() {
this.enabledProperty.set(this.commandService.canExecute(this.commandId, (Map<String, Object>) (Map<?, ?>) this.parameters));
}
@Override
public ReadOnlyBooleanProperty enabledProperty() {
return this.enabledProperty.getReadOnlyProperty();
}
@Override
public boolean isEnabled() {
return this.enabledProperty.get();
}
@SuppressWarnings({ "null", "unchecked" })
@Override
public Optional<O> execute() {
return this.commandService.execute(this.commandId, (Map<String, Object>) (Map<?, ?>) this.parameters);
}
@Override
public ObservableMap<String, String> parameters() {
return this.parameters;
}
}
}
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