/*
* Copyright 2009 Prime Technology.
*
* 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.primefaces.component.imagecropper;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import javax.faces.convert.ConverterException;
import javax.imageio.ImageIO;
import javax.servlet.ServletContext;
import org.primefaces.model.CroppedImage;
import org.primefaces.renderkit.CoreRenderer;
import com.lowagie.text.Image;
public class ImageCropperRenderer extends CoreRenderer {
public void decode(FacesContext facesContext, UIComponent component) {
String clientId = component.getClientId(facesContext);
String submittedValue = facesContext.getExternalContext().getRequestParameterMap().get(getCoordsHolder(clientId));
((ImageCropper) component).setSubmittedValue(submittedValue);
}
public void encodeEnd(FacesContext facesContext, UIComponent component) throws IOException {
ImageCropper cropper = (ImageCropper) component;
encodeImageCropperScript(facesContext, cropper);
encodeImageCropperMarkup(facesContext, cropper);
}
private void encodeImageCropperScript(FacesContext facesContext, ImageCropper cropper) throws IOException{
ResponseWriter writer = facesContext.getResponseWriter();
String cropperVar = createUniqueWidgetVar(facesContext, cropper);
String clientId = cropper.getClientId(facesContext);
writer.startElement("script", null);
writer.writeAttribute("type", "text/javascript", null);
writer.write("YAHOO.util.Event.addListener(window, 'load', function() {\n");
writer.write(cropperVar + " = new YAHOO.widget.ImageCropper('" + getImageId(clientId) + "'");
if(cropper.getValue() != null) {
writer.write(",{");
CroppedImage croppedImage = (CroppedImage) cropper.getValue();
writer.write("initialXY:[" + croppedImage.getLeft() + "," + croppedImage.getTop() + "]");
writer.write(",initWidth:" + croppedImage.getWidth());
writer.write(",initHeight:" + croppedImage.getHeight());
writer.write("}");
}
writer.write(");\n");
writer.write(cropperVar + ".on('moveEvent', PrimeFaces.widget.ImageCropperUtils.attachedCroppedArea, {hiddenFieldId:\"" + getCoordsHolder(clientId) + "\"});\n");
writer.write("});\n");
writer.endElement("script");
}
private void encodeImageCropperMarkup(FacesContext facesContext, ImageCropper cropper) throws IOException{
ResponseWriter writer = facesContext.getResponseWriter();
String clientId = cropper.getClientId(facesContext);
String coordsHolder = getCoordsHolder(clientId);
writer.startElement("div", cropper);
writer.writeAttribute("id", clientId, null);
renderImage(facesContext, cropper, clientId);
writer.startElement("input", null);
writer.writeAttribute("type", "hidden", null);
writer.writeAttribute("id", coordsHolder, null);
writer.writeAttribute("name", coordsHolder, null);
writer.writeAttribute("value", "", null);
writer.endElement("input");
writer.endElement("div");
}
public Object getConvertedValue(FacesContext facesContext, UIComponent component, Object submittedValue) throws ConverterException {
if(submittedValue.equals(""))
return null;
ImageCropper cropper = (ImageCropper) component;
String[] cropCoords = ((String)submittedValue).split("_");
String format = getFormat(cropper.getImage());
int y = Integer.parseInt(cropCoords[0]);
int x = Integer.parseInt(cropCoords[1]);
int w = Integer.parseInt(cropCoords[2]);
int h = Integer.parseInt(cropCoords[3]);
try {
BufferedImage outputImage = getSourceImage(facesContext, cropper);
BufferedImage cropped = outputImage.getSubimage(x, y, w, h);
ByteArrayOutputStream croppedOutImage = new ByteArrayOutputStream();
ImageIO.write(cropped, format, croppedOutImage);
return new CroppedImage(cropper.getImage(), croppedOutImage.toByteArray(), x, y, w, h);
} catch (IOException e) {
throw new ConverterException(e);
}
}
private void renderImage(FacesContext facesContext, ImageCropper cropper, String clientId) throws IOException{
ResponseWriter writer = facesContext.getResponseWriter();
writer.startElement("img", null);
writer.writeAttribute("id", getImageId(clientId), null);
writer.writeAttribute("src", getResourceURL(facesContext, cropper.getImage()), null);
writer.endElement("img");
}
private String getFormat(String path) {
String[] pathTokens = path.split("\\.");
return pathTokens[pathTokens.length -1];
}
private String getCoordsHolder(String clientId) {
return clientId + "_coords";
}
private String getImageId(String clientId) {
return clientId + "_image";
}
private boolean isExternalImage(ImageCropper cropper) {
return cropper.getImage().startsWith("http");
}
private BufferedImage getSourceImage(FacesContext facesContext, ImageCropper cropper) throws IOException {
BufferedImage outputImage = null;
boolean isExternal = isExternalImage(cropper);
if(isExternal) {
URL url = new URL(cropper.getImage());
outputImage = ImageIO.read(url);
}
else {
ServletContext servletContext = (ServletContext) facesContext.getExternalContext().getContext();
String imagePath = servletContext.getRealPath("") + cropper.getImage();
outputImage = ImageIO.read(new File(imagePath));
}
return outputImage;
}
}