/******************************************************************************
* Copyright (c) 2016 Oracle and Other Contributors
* 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:
* Konstantin Komissarchik - initial implementation and ongoing maintenance
* Greg Amerson - [342771] Support "image+label" hint for when actions are presented in a toolbar
******************************************************************************/
package org.eclipse.sapphire.ui;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CopyOnWriteArrayList;
import org.eclipse.sapphire.DisposeEvent;
import org.eclipse.sapphire.Event;
import org.eclipse.sapphire.Listener;
import org.eclipse.sapphire.LoggingService;
import org.eclipse.sapphire.Sapphire;
import org.eclipse.sapphire.modeling.el.Function;
import org.eclipse.sapphire.modeling.el.FunctionContext;
import org.eclipse.sapphire.modeling.el.FunctionResult;
import org.eclipse.sapphire.modeling.el.Literal;
import org.eclipse.sapphire.modeling.el.ModelElementFunctionContext;
import org.eclipse.sapphire.modeling.localization.LocalizationService;
import org.eclipse.sapphire.ui.def.ActionDef;
import org.eclipse.sapphire.ui.def.ISapphireHint;
import org.eclipse.sapphire.ui.def.KeyBindingBehavior;
import org.eclipse.sapphire.ui.def.PartDef;
import org.eclipse.sapphire.ui.def.SapphireActionType;
import org.eclipse.sapphire.ui.def.SapphireKeySequence;
import org.eclipse.sapphire.ui.util.TopologicalSorter;
import org.eclipse.sapphire.util.ListFactory;
/**
* @author <a href="mailto:konstantin.komissarchik@oracle.com">Konstantin Komissarchik</a>
*/
public final class SapphireAction extends SapphireActionSystemPart
{
private SapphireActionGroup parent;
private SapphireActionType type;
private String group;
private SapphireKeySequence keyBinding;
private KeyBindingBehavior keyBindingBehavior;
private final List<SapphireActionHandler> handlers = new CopyOnWriteArrayList<SapphireActionHandler>();
private final Map<SapphireActionHandlerFactory,List<SapphireActionHandler>> handlerFactories = new LinkedHashMap<SapphireActionHandlerFactory,List<SapphireActionHandler>>();
private final List<SapphireActionHandlerFilter> filters = new CopyOnWriteArrayList<SapphireActionHandlerFilter>();
private Listener handlerListener;
private Map<String,Object> hints;
public void init( final SapphireActionGroup parent,
final ActionDef def )
{
this.parent = parent;
super.init( def );
this.handlerListener = new Listener()
{
@Override
public void handle( final Event event )
{
if( event instanceof VisibilityEvent )
{
refreshVisibilityState();
}
else if( event instanceof EnablementChangedEvent )
{
refreshEnablementState();
}
else if( event instanceof CheckedStateChangedEvent )
{
refreshCheckedState();
}
}
};
attach
(
new Listener()
{
@Override
public void handle( final Event event )
{
if( event instanceof HandlersChangedEvent || event instanceof FiltersChangedEvent )
{
refreshVisibilityState();
refreshEnablementState();
refreshCheckedState();
}
else if( event instanceof DisposeEvent )
{
for( SapphireActionHandler handler : SapphireAction.this.handlers )
{
try
{
handler.dispose();
}
catch( Exception e )
{
Sapphire.service( LoggingService.class ).log( e );
}
}
for( SapphireActionHandlerFactory factory : SapphireAction.this.handlerFactories.keySet() )
{
try
{
factory.dispose();
}
catch( Exception e )
{
Sapphire.service( LoggingService.class ).log( e );
}
}
}
}
}
);
this.hints = new HashMap<String,Object>();
if( def != null )
{
this.type = def.getType().content();
this.group = def.getGroup().content();
this.keyBinding = def.getKeyBinding().content();
this.keyBindingBehavior = def.getKeyBindingBehavior().content();
for( ISapphireHint hint : def.getHints() )
{
final String name = hint.getName().text();
Object parsedValue = null;
if( name.equals( PartDef.HINT_STYLE ) )
{
parsedValue = hint.getValue().text();
}
this.hints.put( name, parsedValue );
}
}
setEnabled( false );
}
@Override
protected FunctionContext initFunctionContext()
{
final ISapphirePart part = getPart();
return new ModelElementFunctionContext( part.getLocalModelElement(), part.definition().adapt( LocalizationService.class ) )
{
@Override
public FunctionResult property( final Object element,
final String name )
{
if( element == this && name.equalsIgnoreCase( "handlers" ) )
{
final Function f = new Function()
{
@Override
public String name()
{
return "ReadProperty";
}
@Override
public FunctionResult evaluate( final FunctionContext context )
{
return new FunctionResult( this, context )
{
private Listener listener;
@Override
protected void init()
{
super.init();
this.listener = new Listener()
{
@Override
public void handle( final Event event )
{
if( event instanceof HandlersChangedEvent )
{
refresh();
}
}
};
SapphireAction.this.attach( this.listener );
}
@Override
protected Object evaluate()
{
return getActiveHandlers();
}
@Override
public void dispose()
{
super.dispose();
SapphireAction.this.detach( this.listener );
}
};
}
};
f.init();
return f.evaluate( this );
}
else if( element instanceof SapphireActionHandler && name.equalsIgnoreCase( "label" ) )
{
return Literal.create( ( (SapphireActionHandler) element ).getLabel() ).evaluate( this );
}
return super.property( element, name );
}
};
}
public SapphireActionGroup getActionSet()
{
return this.parent;
}
public final ISapphirePart getPart()
{
return this.parent.getPart();
}
public String getContext()
{
return this.parent.getContext();
}
@SuppressWarnings( "unchecked" )
public <T> T getRenderingHint( final String name,
final T defaultValue )
{
final Object hintValue = this.hints == null ? null : this.hints.get( name );
return hintValue == null ? defaultValue : (T) hintValue;
}
public SapphireActionType getType()
{
synchronized( this )
{
return this.type;
}
}
public void setType( final SapphireActionType type )
{
synchronized( this )
{
this.type = type;
}
broadcast( new TypeChangedEvent() );
}
public String getGroup()
{
synchronized( this )
{
return this.group;
}
}
public void setGroup( final String group )
{
synchronized( this )
{
this.group = group;
}
broadcast( new GroupChangedEvent() );
}
public SapphireKeySequence getKeyBinding()
{
synchronized( this )
{
return this.keyBinding;
}
}
public void setKeyBinding( final SapphireKeySequence keyBinding )
{
synchronized( this )
{
this.keyBinding = keyBinding;
}
broadcast( new KeyBindingChangedEvent() );
}
public KeyBindingBehavior getKeyBindingBehavior()
{
synchronized( this )
{
return this.keyBindingBehavior;
}
}
public void setKeyBindingBehavior( final KeyBindingBehavior keyBindingBehavior )
{
synchronized( this )
{
this.keyBindingBehavior = keyBindingBehavior;
}
broadcast( new KeyBindingBehaviorChangedEvent() );
}
public void addHandler( final SapphireActionHandler handler )
{
handler.attach( this.handlerListener );
this.handlers.add( handler );
broadcast( new HandlersChangedEvent() );
}
public void removeHandler( final SapphireActionHandler handler )
{
handler.detach( this.handlerListener );
this.handlers.remove( handler );
broadcast( new HandlersChangedEvent() );
}
public void removeHandlers( final Collection<SapphireActionHandler> handlers )
{
for( SapphireActionHandler handler : handlers )
{
handler.detach( this.handlerListener );
this.handlers.remove( handler );
}
broadcast( new HandlersChangedEvent() );
}
public void addHandlerFactory( final SapphireActionHandlerFactory factory )
{
synchronized( this )
{
if( this.handlerFactories.containsKey( factory ) )
{
throw new IllegalArgumentException();
}
final List<SapphireActionHandler> handlers = new ArrayList<SapphireActionHandler>();
for( SapphireActionHandler handler : factory.create() )
{
handler.init( this, null );
handler.attach( this.handlerListener );
handlers.add( handler );
}
factory.attach
(
new Listener()
{
@Override
public void handle( final Event event )
{
refreshHandlerFactory( factory );
}
}
);
this.handlerFactories.put( factory, handlers );
}
broadcast( new HandlersChangedEvent() );
}
public void removeHandlerFactory( final SapphireActionHandlerFactory factory )
{
boolean changed = false;
synchronized( this )
{
final List<SapphireActionHandler> handlers = this.handlerFactories.remove( factory );
if( handlers != null )
{
for( SapphireActionHandler handler : handlers )
{
try
{
handler.dispose();
}
catch( Exception e )
{
Sapphire.service( LoggingService.class ).log( e );
}
}
changed = true;
}
}
if( changed )
{
broadcast( new HandlersChangedEvent() );
}
}
private void refreshHandlerFactory( final SapphireActionHandlerFactory factory )
{
synchronized( this )
{
final List<SapphireActionHandler> handlers = this.handlerFactories.get( factory );
if( handlers == null )
{
throw new IllegalStateException();
}
for( SapphireActionHandler handler : handlers )
{
try
{
handler.dispose();
}
catch( Exception e )
{
Sapphire.service( LoggingService.class ).log( e );
}
}
handlers.clear();
for( SapphireActionHandler handler : factory.create() )
{
handler.init( this, null );
handler.attach( this.handlerListener );
handlers.add( handler );
}
}
broadcast( new HandlersChangedEvent() );
}
public List<SapphireActionHandler> getActiveHandlers()
{
synchronized( this )
{
final List<SapphireActionHandler> handlers = new ArrayList<SapphireActionHandler>();
handlers.addAll( this.handlers );
for( List<SapphireActionHandler> factoryHandlers : this.handlerFactories.values() )
{
handlers.addAll( factoryHandlers );
}
final TopologicalSorter<SapphireActionHandler> sorter = new TopologicalSorter<SapphireActionHandler>();
for( SapphireActionHandler handler : handlers )
{
boolean ok = true;
List<SapphireActionHandlerFilter> failedFilters = null;
for( SapphireActionHandlerFilter filter : this.filters )
{
try
{
ok = filter.check( handler );
}
catch( Exception e )
{
Sapphire.service( LoggingService.class ).log( e );
// Filters are booted on first failure to keep malfunctioning filters from
// flooding the log, etc.
if( failedFilters == null )
{
failedFilters = new ArrayList<SapphireActionHandlerFilter>();
}
failedFilters.add( filter );
}
if( ! ok )
{
break;
}
}
if( failedFilters != null )
{
this.filters.removeAll( failedFilters );
}
if( ok )
{
final TopologicalSorter.Entity handlerEntity = sorter.entity( handler.getId(), handler );
for( SapphireActionLocationHint locationHint : handler.getLocationHints() )
{
handlerEntity.constraint( locationHint.toString() );
}
}
}
return Collections.unmodifiableList( sorter.sort() );
}
}
public SapphireActionHandler getFirstActiveHandler()
{
final List<SapphireActionHandler> handlers = getActiveHandlers();
return ( handlers.isEmpty() ? null : handlers.get( 0 ) );
}
public boolean hasActiveHandlers()
{
return ( getFirstActiveHandler() != null );
}
public List<SapphireActionHandler> getEnabledHandlers()
{
final ListFactory<SapphireActionHandler> enabledHandlersListFactory = ListFactory.start();
for( final SapphireActionHandler handler : getActiveHandlers() )
{
if( handler.isEnabled() )
{
enabledHandlersListFactory.add( handler );
}
}
return enabledHandlersListFactory.result();
}
public void addFilter( final SapphireActionHandlerFilter filter )
{
this.filters.add( filter );
broadcast( new FiltersChangedEvent() );
}
public void removeFilter( final SapphireActionHandlerFilter filter )
{
this.filters.remove( filter );
broadcast( new FiltersChangedEvent() );
}
private void refreshVisibilityState()
{
boolean visible = false;
for( SapphireActionHandler handler : getActiveHandlers() )
{
if( handler.isVisible() )
{
visible = true;
break;
}
}
setVisible( visible );
}
private void refreshEnablementState()
{
setEnabled( ! getEnabledHandlers().isEmpty() );
}
private void refreshCheckedState()
{
boolean checked = false;
final SapphireActionHandler handler = getFirstActiveHandler();
if( handler != null )
{
checked = handler.isChecked();
}
setChecked( checked );
}
public static final class TypeChangedEvent extends Event {}
public static final class GroupChangedEvent extends Event {}
public static final class KeyBindingChangedEvent extends Event {}
public static final class KeyBindingBehaviorChangedEvent extends Event {}
public static final class HandlersChangedEvent extends Event {}
public static final class FiltersChangedEvent extends Event {}
}