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/**
 * Copyright (c) 2013, ControlsFX
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 *     * Neither the name of ControlsFX, any associated website, nor the
 * names of its contributors may be used to endorse or promote products
 * derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL CONTROLSFX BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.controlsfx.tools;

import java.net.URL;

import javafx.beans.value.ChangeListener;
import javafx.concurrent.Worker.State;
import javafx.geometry.Rectangle2D;
import javafx.scene.Scene;
import javafx.scene.SnapshotParameters;
import javafx.scene.SnapshotResult;
import javafx.scene.image.ImageView;
import javafx.scene.image.WritableImage;
import javafx.scene.paint.Color;
import javafx.scene.web.WebEngine;
import javafx.scene.web.WebView;
import javafx.stage.Stage;
import javafx.util.Callback;

import com.sun.javafx.webkit.Accessor;
import com.sun.webkit.WebPage;

/**
 * Convenience class that will attempt to load a given URL as an .svg file.
 */
class SVGLoader {
    
    private SVGLoader() {
        // no-op
    }

    /**
     * This method will attempt to load the given svgImage URL into an ImageView
     * node that will be provided asynchronously via the provided 
     * {@link Callback}, and it will be sized to the given prefWidth / prefHeight.
     * 
     * 

Note that it is valid to pass in -1 to prefWidth and / or prefHeight as * an indicator to the SVG loader. If both values are -1, the default width * of the SVG will be used. If one of the values is -1, then the SVG will * be sized to ensure that it remains proportional. * * @param svgImage The image to load. * @param prefWidth The preferred width of the image when loaded, or -1 if * there is no preferred width. * @param prefHeight The preferred height of the image when loaded, or -1 if * there is no preferred height. * @param callback The {@link Callback} that will be called when the SVG * image is loaded, where the {@link ImageView} containing the rendered * image will be available. */ public static void loadSVGImage(final URL svgImage, final double prefWidth, final double prefHeight, final Callback callback) { loadSVGImage(svgImage, prefWidth, prefHeight, callback, null); } /** * This method will attempt to load the given svgImage URL into the provided * {@link WritableImage}, with the SVG scaled to fit the size of the * WritableImage. * * @param svgImage The image to load. * @param outputImage The location to write the loaded image once it has * been rendered (it will not happen synchronously). * @throws NullPointerException The outputImage argument must be non-null. */ public static void loadSVGImage(final URL svgImage, final WritableImage outputImage) { if (outputImage == null) { throw new NullPointerException("outputImage can not be null"); } final double w = outputImage.getWidth(); final double h = outputImage.getHeight(); loadSVGImage(svgImage, w, h, null, outputImage); } public static void loadSVGImage(final URL svgImage, final double prefWidth, final double prefHeight, final Callback callback, final WritableImage outputImage) { final WebView view = new WebView(); final WebEngine eng = view.getEngine(); // using non-public API to ensure background transparency final WebPage webPage = Accessor.getPageFor(eng); webPage.setBackgroundColor(webPage.getMainFrame(), 0xffffff00); webPage.setOpaque(webPage.getMainFrame(), false); // end of non-public API // temporary scene / stage final Scene scene = new Scene(view); final Stage stage = new Stage(); stage.setScene(scene); stage.setWidth(0); stage.setHeight(0); stage.setOpacity(0); stage.show(); // String svgString = readFile(svgImage); String content = "" + "" + // "

" + "" + // svgString + // "
" + "" + ""; System.out.println(content); eng.loadContent(content); eng.getLoadWorker().stateProperty().addListener(new ChangeListener() { @Override public void changed(javafx.beans.value.ObservableValue o, State oldValue, State newValue) { if (newValue == State.SUCCEEDED) { // HTMLImageElement svgImageElement = (HTMLImageElement) getSvgDom(eng); // System.out.println(svgImageElement.getAttributes()); final double svgWidth = prefWidth >= 0 ? prefWidth : getSvgWidth(eng); final double svgHeight = prefHeight >= 0 ? prefWidth : getSvgHeight(eng); SnapshotParameters params = new SnapshotParameters(); params.setFill(Color.TRANSPARENT); params.setViewport(new Rectangle2D(0, 0, svgWidth, svgHeight)); view.snapshot(new Callback() { @Override public Void call(SnapshotResult param) { WritableImage snapshot = param.getImage(); ImageView image = new ImageView(snapshot); if (callback != null) { callback.call(image); } stage.hide(); return null; } }, params, outputImage); } } }); } // private static String readFile(URL url) { // try { // FileInputStream stream = new FileInputStream(new File(url.toURI())); // try { // FileChannel fc = stream.getChannel(); // MappedByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size()); // return Charset.defaultCharset().decode(bb).toString(); // } // finally { // stream.close(); // } // } catch (Exception e) { // e.printStackTrace(); // } // return null; // } private static double getSvgWidth(WebEngine webEngine) { Object result = getSvgDomProperty(webEngine, "offsetWidth"); if (result instanceof Integer) { return (Integer) result; } return -1; } private static double getSvgHeight(WebEngine webEngine) { Object result = getSvgDomProperty(webEngine, "offsetHeight"); if (result instanceof Integer) { return (Integer) result; } return -1; } private static Object getSvgDomProperty(final WebEngine webEngine, final String property) { return webEngine.executeScript("document.getElementById('svgImage')." + property); } // private static HTMLImageElement getSvgDom(WebEngine webEngine) { // return (HTMLImageElement) webEngine.executeScript("document.getElementById('svgImage')"); // } // // private static void printDocument(Document doc, OutputStream out) throws IOException, TransformerException { // TransformerFactory tf = TransformerFactory.newInstance(); // Transformer transformer = tf.newTransformer(); // transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "no"); // transformer.setOutputProperty(OutputKeys.METHOD, "xml"); // transformer.setOutputProperty(OutputKeys.INDENT, "yes"); // transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8"); // transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4"); // // transformer.transform(new DOMSource(doc), // new StreamResult(new OutputStreamWriter(out, "UTF-8"))); // } }




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