/*******************************************************************************
* Copyright (c) 2013, 2015 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 org.eclipse.swt.internal.browser.browserkit;
import static org.eclipse.rap.rwt.internal.lifecycle.WidgetUtil.getId;
import static org.eclipse.swt.internal.browser.browserkit.BrowserLCA.EXECUTED_FUNCTION_ERROR;
import static org.eclipse.swt.internal.browser.browserkit.BrowserLCA.EXECUTED_FUNCTION_NAME;
import static org.eclipse.swt.internal.browser.browserkit.BrowserLCA.EXECUTED_FUNCTION_RESULT;
import static org.eclipse.swt.internal.events.EventTypes.PROGRESS_CHANGED;
import static org.eclipse.swt.internal.events.EventTypes.PROGRESS_COMPLETED;
import org.eclipse.rap.json.JsonArray;
import org.eclipse.rap.json.JsonObject;
import org.eclipse.rap.json.JsonValue;
import org.eclipse.rap.rwt.internal.lifecycle.ProcessActionRunner;
import org.eclipse.rap.rwt.internal.protocol.ControlOperationHandler;
import org.eclipse.rap.rwt.internal.service.ContextProvider;
import org.eclipse.rap.rwt.internal.service.ServiceStore;
import org.eclipse.swt.SWT;
import org.eclipse.swt.browser.Browser;
import org.eclipse.swt.browser.BrowserFunction;
import org.eclipse.swt.internal.widgets.IBrowserAdapter;
import org.eclipse.swt.widgets.Event;
public class BrowserOperationHandler extends ControlOperationHandler<Browser> {
private static final String METHOD_EXECUTE_FUNCTION = "executeFunction";
private static final String PARAM_NAME = "name";
private static final String PARAM_ARGUMENTS = "arguments";
private static final String METHOD_EVALUATION_SUCCEEDED = "evaluationSucceeded";
private static final String METHOD_EVALUATION_FAILED = "evaluationFailed";
private static final String PARAM_RESULT = "result";
private static final String EVENT_PROGRESS = "Progress";
public BrowserOperationHandler( Browser browser ) {
super( browser );
}
@Override
public void handleCall( Browser browser, String method, JsonObject properties ) {
if( METHOD_EXECUTE_FUNCTION.equals( method ) ) {
handleCallExecuteFunction( browser, properties );
} else if( METHOD_EVALUATION_SUCCEEDED.equals( method ) ) {
handleCallEvaluationSucceeded( browser, properties );
} else if( METHOD_EVALUATION_FAILED.equals( method ) ) {
handleCallEvaluationFailed( browser );
}
}
@Override
public void handleNotify( Browser browser, String eventName, JsonObject properties ) {
if( EVENT_PROGRESS.equals( eventName ) ) {
handleNotifyProgress( browser );
} else {
super.handleNotify( browser, eventName, properties );
}
}
/*
* PROTOCOL CALL executeFunction
*
* @param name (string) the name of the function
* @param arguments ([object]) array with function arguments
*/
public void handleCallExecuteFunction( final Browser browser, JsonObject properties ) {
String name = properties.get( PARAM_NAME ).asString();
final BrowserFunction function = findBrowserFunction( browser, name );
if( function != null ) {
final Object[] arguments = jsonToJava( properties.get( PARAM_ARGUMENTS ).asArray() );
ProcessActionRunner.add( new Runnable() {
@Override
public void run() {
executeFunction( browser, function, arguments );
}
} );
}
}
/*
* PROTOCOL CALL evaluationSucceeded
*
* @param result ([object]) array with one element that contains evaluation result
*/
public void handleCallEvaluationSucceeded( Browser browser, JsonObject properties ) {
JsonValue value = properties.get( PARAM_RESULT );
Object result = null;
if( value != null && !value.isNull() ) {
result = jsonToJava( value.asArray() )[ 0 ];
}
getAdapter( browser ).setExecuteResult( true, result );
}
/*
* PROTOCOL CALL evaluationFailed
*
*/
public void handleCallEvaluationFailed( Browser browser ) {
getAdapter( browser ).setExecuteResult( false, null );
}
/*
* PROTOCOL NOTIFY Progress
*
*/
public void handleNotifyProgress( Browser browser ) {
browser.notifyListeners( PROGRESS_CHANGED, new Event() );
browser.notifyListeners( PROGRESS_COMPLETED, new Event() );
}
private static BrowserFunction findBrowserFunction( Browser browser, String name ) {
BrowserFunction[] functions = getAdapter( browser ).getBrowserFunctions();
for( BrowserFunction function : functions ) {
if( function.getName().equals( name ) ) {
return function;
}
}
return null;
}
private static void executeFunction( Browser browser, BrowserFunction function, Object[] arguments )
{
try {
JsonValue result = javaToJson( function.function( arguments ) );
setExecutedFunctionResult( browser, result );
} catch( Exception exception ) {
setExecutedFunctionError( browser, exception.getMessage() );
}
setExecutedFunctionName( browser, function.getName() );
}
private static void setExecutedFunctionResult( Browser browser, Object result ) {
ServiceStore serviceStore = ContextProvider.getServiceStore();
serviceStore.setAttribute( EXECUTED_FUNCTION_RESULT + getId( browser ), result );
}
private static void setExecutedFunctionError( Browser browser, String error ) {
ServiceStore serviceStore = ContextProvider.getServiceStore();
serviceStore.setAttribute( EXECUTED_FUNCTION_ERROR + getId( browser ), error );
}
private static void setExecutedFunctionName( Browser browser, String name ) {
ServiceStore serviceStore = ContextProvider.getServiceStore();
serviceStore.setAttribute( EXECUTED_FUNCTION_NAME + getId( browser ), name );
}
static Object jsonToJava( JsonValue value ) {
Object result;
if( value.isNull() ) {
result = null;
} else if( value.isBoolean() ) {
result = Boolean.valueOf( value.asBoolean() );
} else if( value.isNumber() ) {
result = Double.valueOf( value.asDouble() );
} else if( value.isString() ) {
result = value.asString();
} else if( value.isArray() ) {
result = jsonToJava( value.asArray() );
} else {
throw new RuntimeException( "Unable to convert JsonValue to Java: " + value );
}
return result;
}
private static Object[] jsonToJava( JsonArray value ) {
Object[] result = new Object[ value.size() ];
for( int i = 0; i < result.length; i++ ) {
result[ i ] = jsonToJava( value.get( i ) );
}
return result;
}
static JsonValue javaToJson( Object value ) {
if( value == null ) {
return JsonValue.NULL;
}
if( value instanceof String ) {
return JsonValue.valueOf( ( String )value );
}
if( value instanceof Number ) {
return JsonValue.valueOf( ( ( Number )value ).doubleValue() );
}
if( value instanceof Boolean ) {
return JsonValue.valueOf( ( ( Boolean )value ).booleanValue() );
}
if( value instanceof Object[] ) {
return javaToJson( ( Object[] )value );
}
SWT.error( SWT.ERROR_INVALID_RETURN_VALUE );
return null;
}
private static JsonValue javaToJson( Object[] array ) {
JsonArray jsonArray = new JsonArray();
for( int i = 0; i < array.length; i++ ) {
jsonArray.add( javaToJson( array[ i ] ) );
}
return jsonArray;
}
private static IBrowserAdapter getAdapter( Browser browser ) {
return browser.getAdapter( IBrowserAdapter.class );
}
}