/*
* Copyright 2011 cruxframework.org.
*
* 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.cruxframework.crux.core.rebind.crossdevice;
import java.util.Arrays;
import java.util.List;
import java.util.SortedSet;
import org.cruxframework.crux.core.rebind.CruxGeneratorException;
import com.google.gwt.core.ext.TreeLogger;
import com.google.gwt.core.ext.UnableToCompleteException;
import com.google.gwt.core.ext.linker.ConfigurationProperty;
import com.google.gwt.core.ext.linker.PropertyProviderGenerator;
import com.google.gwt.user.rebind.SourceWriter;
import com.google.gwt.user.rebind.StringSourceWriter;
/**
* @author Thiago da Rosa de Bustamante
*
*/
public class DeviceFeaturesPropertyGenerator implements PropertyProviderGenerator
{
private static final List<String> VALID_VALUES = Arrays.asList(new String[]{
"largeDisplayMouse", "largeDisplayTouch", "largeDisplayArrows", "smallDisplayArrows", "smallDisplayTouch"});
static void writeDeviceFeaturesPropertyJavaScript(SourceWriter body)
{
body.println("var ua = navigator.userAgent.toLowerCase();");
body.println("var supportsTouch = ('ontouchstart' in window);");
body.println("if ((ua.indexOf('googletv') != -1) || (ua.indexOf('ipad;') != -1)){");
body.indent();
body.println("return 'largeDisplay'+(supportsTouch?'Touch':'Arrows');");
body.outdent();
body.println("} else if ((ua.indexOf('opera mini') != -1) || (ua.indexOf('opera mobi') != -1) || (ua.indexOf('mobile') != -1) || "+
"(ua.indexOf('iphone') != -1) || (ua.indexOf('ipod;') != -1)){");
body.indent();
body.println("return 'smallDisplay'+(supportsTouch?'Touch':'Arrows');");
body.outdent();
body.println("} else if (ua.indexOf('android') != -1){");
body.indent();
body.println("return 'largeDisplay'+(supportsTouch?'Touch':'Arrows');");
body.outdent();
body.println("} else {");
body.indent();
body.println("return 'largeDisplay'+(supportsTouch?'Touch':'Mouse');");
body.outdent();
body.println("}");
}
public String generate(TreeLogger logger, SortedSet<String> possibleValues, String fallback, SortedSet<ConfigurationProperty> configProperties) throws UnableToCompleteException
{
for (String value : possibleValues)
{
if (!VALID_VALUES.contains(value))
{
throw new CruxGeneratorException("Property device.features can not be assigned to value ["+value+"].");
}
}
StringSourceWriter body = new StringSourceWriter();
body.println("{");
body.indent();
writeDeviceFeaturesPropertyJavaScript(body);
body.outdent();
body.println("}");
return body.toString();
}
}