/*******************************************************************************
* Copyright (c) 2013 EclipseSource 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:
* EclipseSource - initial API and implementation
******************************************************************************/
package com.eclipsesource.tabris.internal.ui;
import static com.eclipsesource.tabris.internal.Clauses.when;
import static com.eclipsesource.tabris.internal.Clauses.whenNull;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import com.eclipsesource.tabris.internal.ZIndexStackLayout;
import com.eclipsesource.tabris.internal.ui.rendering.ActionRenderer;
import com.eclipsesource.tabris.internal.ui.rendering.PageRenderer;
import com.eclipsesource.tabris.internal.ui.rendering.RendererFactory;
import com.eclipsesource.tabris.internal.ui.rendering.UIRenderer;
import com.eclipsesource.tabris.ui.Page;
import com.eclipsesource.tabris.ui.PageConfiguration;
import com.eclipsesource.tabris.ui.PageData;
import com.eclipsesource.tabris.ui.TransitionListener;
import com.eclipsesource.tabris.ui.UIConfiguration;
public class Controller implements UIUpdater, Serializable {
private final UIDescriptor uiDescriptor;
private final Composite pageParent;
private final Composite actionsParent;
private final UIRenderer uiRenderer;
private final List<ActionRenderer> globalActionRenderers;
private final Map<PageDescriptor, PageRenderer> topLevelPageRenderers;
private PageFlow currentFlow;
private UIImpl ui;
public Controller( UIRenderer uiRenderer, UIDescriptor uiDescriptor ) {
this.uiRenderer = uiRenderer;
this.pageParent = uiRenderer.getPageParent();
this.actionsParent = uiRenderer.getActionsParent();
this.uiDescriptor = uiDescriptor;
this.globalActionRenderers = new ArrayList<ActionRenderer>();
this.topLevelPageRenderers = new HashMap<PageDescriptor, PageRenderer>();
UpdateUtil.registerUpdater( this );
}
public void setUI( UIImpl ui ) {
this.ui = ui;
}
@Override
public void update( UIConfiguration uiConfiguration ) {
UIDescriptor descriptor = uiConfiguration.getAdapter( UIDescriptor.class );
updateGlobalActions( descriptor );
updateRootPages( descriptor );
actionsParent.getShell().layout( true, true );
}
private void updateGlobalActions( UIDescriptor descriptor ) {
List<ActionDescriptor> globalActions = descriptor.getGlobalActions();
for( ActionDescriptor actionDescriptor : globalActions ) {
if( !actionExist( actionDescriptor ) ) {
createGlobalAction( ui, actionDescriptor );
}
}
removeDeletedGlobalActions( descriptor );
}
private void removeDeletedGlobalActions( UIDescriptor descriptor ) {
for( ActionRenderer renderer : new ArrayList<ActionRenderer>( globalActionRenderers ) ) {
if( !actionStillExist( renderer, descriptor ) ) {
renderer.destroy();
globalActionRenderers.remove( renderer );
}
}
}
private boolean actionStillExist( ActionRenderer renderer, UIDescriptor descriptor ) {
List<ActionDescriptor> globalActions = descriptor.getGlobalActions();
for( ActionDescriptor actionDescriptor : globalActions ) {
if( actionDescriptor.getId().equals( renderer.getDescriptor().getId() ) ) {
return true;
}
}
return false;
}
private void updateRootPages( UIDescriptor descriptor ) {
List<PageDescriptor> rootPages = descriptor.getRootPages();
createTopLevelPageRenderer( ui, rootPages );
}
private boolean actionExist( ActionDescriptor actionDescriptor ) {
for( ActionRenderer renderer : globalActionRenderers ) {
if( renderer.getDescriptor().getId().equals( actionDescriptor.getId() ) ) {
return true;
}
}
return false;
}
@Override
public void update( PageConfiguration pageConfiguration ) {
PageDescriptor descriptor = pageConfiguration.getAdapter( PageDescriptor.class );
List<PageRenderer> allPages = getAllPages();
for( PageRenderer renderer : allPages ) {
if( renderer.getDescriptor().getId().equals( descriptor.getId() ) ) {
renderer.update( descriptor, uiDescriptor.getRendererFactory(), actionsParent );
}
}
actionsParent.getShell().layout( true, true );
}
@Override
public void remove( PageConfiguration pageConfiguration ) {
PageDescriptor descriptor = pageConfiguration.getAdapter( PageDescriptor.class );
verifyPageIsNoInCurrentFlow( descriptor );
destroyPage( descriptor );
}
private void verifyPageIsNoInCurrentFlow( PageDescriptor descriptor ) {
List<PageRenderer> allRenderers = currentFlow.getAllRenderers();
for( PageRenderer pageRenderer : allRenderers ) {
if( pageRenderer.getDescriptor().getId().equals( descriptor.getId() ) ) {
throw new IllegalStateException( "Can not remove page from current chain" );
}
}
}
private void destroyPage( PageDescriptor descriptor ) {
for( Entry<PageDescriptor, PageRenderer> entry : topLevelPageRenderers.entrySet() ) {
if( entry.getKey().getId().equals( descriptor.getId() ) ) {
entry.getValue().destroy();
}
}
}
public void createRootPages( UIImpl ui ) {
List<PageDescriptor> pageDescriptors = uiDescriptor.getRootPages();
when( pageDescriptors.isEmpty() ).throwIllegalState( "No TopLevel Pages found." );
createTopLevelPageRenderer( ui, pageDescriptors );
showRoot( ui, pageDescriptors.get( 0 ), new PageData() );
}
private void createTopLevelPageRenderer( UIImpl ui, List<PageDescriptor> pages ) {
for( PageDescriptor descriptor : pages ) {
if( !exist( descriptor ) ) {
RendererFactory rendererFactory = uiDescriptor.getRendererFactory();
PageRenderer renderer = rendererFactory.createPageRenderer( ui, uiRenderer, descriptor, new PageData() );
topLevelPageRenderers.put( descriptor, renderer );
renderer.createControl( pageParent );
}
}
}
private boolean exist( PageDescriptor descriptor ) {
for( Entry<PageDescriptor, PageRenderer> entry : topLevelPageRenderers.entrySet() ) {
if( entry.getKey().getId().equals( descriptor.getId() ) ) {
return true;
}
}
return false;
}
public void createGlobalActions( UIImpl ui ) {
List<ActionDescriptor> actionDescriptors = uiDescriptor.getGlobalActions();
for( ActionDescriptor actionDescriptor : actionDescriptors ) {
createGlobalAction( ui, actionDescriptor );
}
}
private void createGlobalAction( UIImpl ui, ActionDescriptor actionDescriptor ) {
RendererFactory rendererFactory = uiDescriptor.getRendererFactory();
ActionRenderer renderer = rendererFactory.createActionRenderer( ui, uiRenderer, actionDescriptor );
renderer.createUi( actionsParent );
globalActionRenderers.add( renderer );
}
void show( UIImpl ui, PageDescriptor newPageDescriptor, PageData data ) {
if( newPageDescriptor.isTopLevel() ) {
showRoot( ui, newPageDescriptor, data );
} else {
showPage( ui, newPageDescriptor, data );
}
}
void showRoot( UIImpl ui, PageDescriptor newPageDescriptor, PageData data ) {
PageRenderer oldRoot = null;
PageRenderer newRoot = topLevelPageRenderers.get( newPageDescriptor );
newRoot.getData().addData( data );
if( currentFlow != null ) {
oldRoot = cleanupOldRoot( ui, newRoot );
}
initializeNewRoot( ui, oldRoot, newRoot );
}
private PageRenderer cleanupOldRoot( UIImpl ui, PageRenderer root ) {
PageRenderer oldRoot = currentFlow.getCurrentRenderer();
fireTransitionBeforeEvent( ui, oldRoot, root );
oldRoot.destroyActions();
oldRoot.getPage().deactivate();
currentFlow.destroy();
return oldRoot;
}
private void initializeNewRoot( UIImpl ui, PageRenderer oldRoot, PageRenderer newRoot ) {
currentFlow = new PageFlow( newRoot );
newRoot.createActions( uiDescriptor.getRendererFactory(), actionsParent );
uiRenderer.activate( newRoot );
newRoot.getPage().activate();
makeControlVisible( currentFlow.getCurrentRenderer().getControl() );
fireTransitionAfterEvent( ui, oldRoot, newRoot );
}
PageRenderer showPage( UIImpl ui, PageDescriptor newPage, PageData data ) {
PageRenderer oldPageRenderer = cleanupOldPageRenderer( ui );
return initializeNewPage( ui, newPage, oldPageRenderer, data );
}
private PageRenderer cleanupOldPageRenderer( UIImpl ui ) {
PageRenderer oldPageRenderer = currentFlow.getCurrentRenderer();
oldPageRenderer.destroyActions();
oldPageRenderer.getPage().deactivate();
return oldPageRenderer;
}
private PageRenderer initializeNewPage( UIImpl ui,
PageDescriptor newPage,
PageRenderer oldPageRenderer,
PageData data )
{
RendererFactory rendererFactory = uiDescriptor.getRendererFactory();
PageRenderer newPageRenderer = rendererFactory.createPageRenderer( ui, uiRenderer, newPage, data );
fireTransitionBeforeEvent( ui, oldPageRenderer, newPageRenderer );
currentFlow.add( newPageRenderer );
newPageRenderer.createActions( uiDescriptor.getRendererFactory(), actionsParent );
newPageRenderer.createControl( pageParent );
uiRenderer.activate( newPageRenderer );
newPageRenderer.getPage().activate();
makeControlVisible( newPageRenderer.getControl() );
fireTransitionAfterEvent( ui, oldPageRenderer, newPageRenderer );
return newPageRenderer;
}
boolean closeCurrentPage( UIImpl ui ) {
if( currentFlow != null && currentFlow.getPreviousRenderer() != null ) {
restorePreviousPage( ui, currentFlow.getPreviousRenderer() );
return true;
}
return false;
}
private void restorePreviousPage( UIImpl ui, PageRenderer previousPageRenderer ) {
fireTransitionBeforeEvent( ui, currentFlow.getCurrentRenderer(), previousPageRenderer );
PageRenderer removedPage = cleanUpCurrentPage( ui );
initializePreviousPage( ui, previousPageRenderer );
fireTransitionAfterEvent( ui, removedPage, previousPageRenderer );
}
private PageRenderer cleanUpCurrentPage( UIImpl ui ) {
PageRenderer removedPage = currentFlow.getCurrentRenderer();
removedPage.getPage().deactivate();
removedPage.destroy();
removedPage.destroyActions();
currentFlow.pop();
return removedPage;
}
private void initializePreviousPage( UIImpl ui, PageRenderer previousPage ) {
previousPage.createActions( uiDescriptor.getRendererFactory(), actionsParent );
uiRenderer.activate( previousPage );
previousPage.getPage().activate();
makeControlVisible( previousPage.getControl() );
}
private void makeControlVisible( Control control ) {
ZIndexStackLayout stack = ( ZIndexStackLayout )pageParent.getLayout();
stack.setOnTopControl( control );
pageParent.layout( true );
}
public void setTitle( Page page, String title ) {
if( currentFlow != null ) {
PageRenderer rendererToModify = null;
List<PageRenderer> allPageRenderes = currentFlow.getAllRenderers();
for( PageRenderer renderer : allPageRenderes ) {
if( renderer.getPage().equals( page ) ) {
rendererToModify = renderer;
break;
}
}
setPageTitle( rendererToModify, title );
}
}
private void setPageTitle( PageRenderer remotePage, String title ) {
if( remotePage != null ) {
remotePage.setTitle( title );
} else {
throw new IllegalStateException( "Page does not exist." );
}
}
public Page getCurrentPage() {
if( currentFlow != null ) {
return currentFlow.getCurrentRenderer().getPage();
}
return null;
}
public String getCurrentPageId() {
if( currentFlow != null ) {
return currentFlow.getCurrentRenderer().getDescriptor().getId();
}
return null;
}
public PageData getCurrentData() {
if( currentFlow != null ) {
return currentFlow.getCurrentRenderer().getData();
}
return null;
}
List<PageRenderer> getAllPages() {
List<PageRenderer> pages = new ArrayList<PageRenderer>( topLevelPageRenderers.values() );
if( currentFlow != null ) {
pages.addAll( currentFlow.getAllRenderers() );
}
return pages;
}
public void setActionEnabled( String id, boolean enabled ) {
ActionRenderer action = findRemoteAction( id );
action.setEnabled( enabled );
}
public void setActionVisible( String id, boolean visible ) {
ActionRenderer action = findRemoteAction( id );
action.setVisible( visible );
}
ActionRenderer findRemoteAction( String id ) {
ActionRenderer result = findActionInGlobalActions( id );
if( result == null ) {
result = findActionInPageActions( id );
}
whenNull( result ).throwIllegalState( "Action with id " + id + " does not exist." );
return result;
}
boolean hasAction( String id ) {
ActionRenderer result = findActionInGlobalActions( id );
if( result == null ) {
result = findActionInPageActions( id );
}
return result != null;
}
private ActionRenderer findActionInGlobalActions( String id ) {
for( ActionRenderer action : globalActionRenderers ) {
if( action.getDescriptor().getId().equals( id ) ) {
return action;
}
}
return null;
}
private ActionRenderer findActionInPageActions( String id ) {
if( currentFlow != null ) {
return findActionInCurrentFlow( id );
}
return null;
}
private ActionRenderer findActionInCurrentFlow( String id ) {
List<PageRenderer> allPageRenderers = currentFlow.getAllRenderers();
for( PageRenderer pageRenderer : allPageRenderers ) {
List<ActionRenderer> actionRenderers = pageRenderer.getActionRenderers();
for( ActionRenderer actionRenderer : actionRenderers ) {
if( actionRenderer.getDescriptor().getId().equals( id ) ) {
return actionRenderer;
}
}
}
return null;
}
void fireTransitionBeforeEvent( UIImpl ui, PageRenderer from, PageRenderer to ) {
UIDescriptor uiDescriptor = ui.getConfiguration().getAdapter( UIDescriptor.class );
List<TransitionListener> listeners = new ArrayList<TransitionListener>( uiDescriptor.getTransitionListeners() );
for( TransitionListener listener : listeners ) {
Page oldPage = from != null ? from.getPage() : null;
Page newPage = to != null ? to.getPage() : null;
listener.before( ui, oldPage, newPage );
}
}
void fireTransitionAfterEvent( UIImpl ui, PageRenderer from, PageRenderer to ) {
UIDescriptor uiDescriptor = ui.getConfiguration().getAdapter( UIDescriptor.class );
List<TransitionListener> listeners = new ArrayList<TransitionListener>( uiDescriptor.getTransitionListeners() );
for( TransitionListener listener : listeners ) {
Page oldPage = from != null ? from.getPage() : null;
Page newPage = to != null ? to.getPage() : null;
listener.after( ui, oldPage, newPage );
}
}
Map<PageDescriptor, PageRenderer> getRootPages() {
return topLevelPageRenderers;
}
}