/*
* Copyright 2010 Gal Dolber.
*
* 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 com.guit.rebind.binder.contributor;
import com.google.gwt.core.ext.GeneratorContext;
import com.google.gwt.core.ext.TreeLogger;
import com.google.gwt.core.ext.TreeLogger.Type;
import com.google.gwt.core.ext.UnableToCompleteException;
import com.google.gwt.core.ext.typeinfo.JClassType;
import com.google.gwt.event.dom.client.MouseDownEvent;
import com.google.gwt.event.dom.client.MouseUpEvent;
import com.google.gwt.user.rebind.StringSourceWriter;
import com.guit.client.binder.contributor.MouseButton;
import com.guit.client.binder.contributor.MouseButton.MouseButtons;
import com.guit.rebind.binder.BinderContext;
import com.guit.rebind.binder.BinderContributor;
public class MouseButtonContributor implements BinderContributor {
@Override
public void contribute(BinderContext binderContext, TreeLogger logger, GeneratorContext context)
throws UnableToCompleteException {
JClassType eventType = binderContext.getEventType();
String eventName = eventType.getQualifiedSourceName();
if (!eventName.equals(MouseDownEvent.class.getCanonicalName())
&& !eventName.equals(MouseUpEvent.class.getCanonicalName())) {
logger.log(Type.ERROR, String.format(
"The binder annotation %s is only valid in %s or %s events. Found: %s.%s",
MouseButton.class.getCanonicalName(), MouseDownEvent.class.getCanonicalName(),
MouseUpEvent.class.getCanonicalName(), binderContext.getPresenterType()
.getQualifiedSourceName(), binderContext.getMethod().getName()));
throw new UnableToCompleteException();
}
MouseButtons[] keycodes = binderContext.getMethod().getAnnotation(MouseButton.class).value();
StringBuilder condition = new StringBuilder();
for (MouseButtons button : keycodes) {
if (condition.length() > 0) {
condition.append(" && ");
}
// LEFT by default
int buttonNumber = 1;
switch (button) {
case MIDDLE:
buttonNumber = 4;
break;
case RIGHT:
buttonNumber = 2;
break;
default:
break;
}
condition.append("_____mouseButton != " + buttonNumber);
}
StringSourceWriter writer = new StringSourceWriter();
writer.println("int _____mouseButton = event.getNativeEvent().getButton();");
writer.println("if (" + condition.toString() + ") {");
writer.indent();
writer.println("return;");
writer.outdent();
writer.println("}");
binderContext.addBeforeWrappers(writer);
}
@Override
public String name() {
return "KeyCode";
}
}