com.googlecode.gwtphonegap.client.inappbrowser.InAppBrowserReferenceBaseImpl.java Source code

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Here is the source code for com.googlecode.gwtphonegap.client.inappbrowser.InAppBrowserReferenceBaseImpl.java

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/*
 * Copyright 2013 Daniel Kurka
 * 
 * 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.googlecode.gwtphonegap.client.inappbrowser;

import com.google.gwt.event.shared.HandlerManager;
import com.google.web.bindery.event.shared.HandlerRegistration;

public abstract class InAppBrowserReferenceBaseImpl implements InAppBrowserReference {

    private HandlerManager handlerManager;

    @Override
    public abstract void close();

    @Override
    public HandlerRegistration addExitHandler(ExitHandler handler) {
        ensureHandlers();
        return handlerManager.addHandler(ExitEvent.getType(), handler);
    }

    @Override
    public HandlerRegistration addLoadStartHandler(LoadStartHandler handler) {
        ensureHandlers();
        return handlerManager.addHandler(LoadStartEvent.getType(), handler);
    }

    @Override
    public HandlerRegistration addLoadStopHandler(LoadStopHandler handler) {
        ensureHandlers();
        return handlerManager.addHandler(LoadStopEvent.getType(), handler);
    }

    @Override
    public HandlerRegistration addLoadErrorHandler(LoadErrorHandler handler) {
        ensureHandlers();
        return handlerManager.addHandler(LoadErrorEvent.getType(), handler);
    }

    protected HandlerManager createHandlerManager() {
        return new HandlerManager(this);
    }

    protected void ensureHandlers() {
        if (handlerManager == null) {
            handlerManager = createHandlerManager();
            addJavaScriptHandlers();
        }
    }

    protected abstract void addJavaScriptHandlers();

    protected void fireLoadStartEvent(String url) {
        if (handlerManager != null) {
            handlerManager.fireEvent(new LoadStartEvent(url));
        }
    }

    protected void fireLoadStopEvent(String url) {
        if (handlerManager != null) {
            handlerManager.fireEvent(new LoadStopEvent(url));
        }
    }

    protected void fireExitEvent() {
        if (handlerManager != null) {
            handlerManager.fireEvent(new ExitEvent());
        }
    }

    protected void fireLoadErrorEvent(String url) {
        if (handlerManager != null) {
            handlerManager.fireEvent(new LoadErrorEvent(url));
        }
    }
}