annis.gui.components.StatefulBrowserComponent.java Source code

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Here is the source code for annis.gui.components.StatefulBrowserComponent.java

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/*
 * Copyright 2014 Corpuslinguistic working group Humboldt University Berlin.
 *
 * 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 annis.gui.components;

import java.net.URI;

import com.vaadin.annotations.JavaScript;
import com.vaadin.ui.AbstractJavaScriptComponent;
import com.vaadin.ui.JavaScriptFunction;
import com.vaadin.ui.VerticalLayout;

import org.json.JSONException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import elemental.json.JsonArray;
import elemental.json.JsonType;
import elemental.json.JsonValue;

/**
 * Embedds a single HTML page and adds navigation to it's headers (if they have
 * an id).
 *
 * This is e.g. useful for documentation.
 *
 * @author Thomas Krause <krauseto@hu-berlin.de>
 */
public class StatefulBrowserComponent extends VerticalLayout {

    private final static Logger log = LoggerFactory.getLogger(StatefulBrowserComponent.class);

    private final IFrameComponent iframe = new IFrameComponent();

    public StatefulBrowserComponent(URI externalURI) {
        iframe.setSizeFull();

        addComponent(iframe);

        setExpandRatio(iframe, 1.0f);

        setSource(externalURI);
    }

    private void setSource(URI externalURI) {
        iframe.getState().setSource(externalURI.toASCIIString());
    }

    @JavaScript({ "vaadin://jquery.js", "statefulbrowsercomponent.js" })
    private class IFrameComponent extends AbstractJavaScriptComponent {

        public IFrameComponent() {
            addFunction("urlChanged", new JavaScriptFunction() {

                @Override
                public void call(JsonArray arguments) throws JSONException {
                    getState().setSource(arguments.get(0).asString());
                    getState().setLastScrollPos(0);
                }
            });
            addFunction("scrolled", new JavaScriptFunction() {

                @Override
                public void call(JsonArray arguments) throws JSONException {
                    getState().setLastScrollPos((int) arguments.getNumber(0));
                }
            });
        }

        @Override
        public final IframeState getState() {
            return (IframeState) super.getState();
        }
    }
}