/*
* Copyright 2009-2014 PrimeTek.
*
* 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.URL;
import java.util.Map;
import javax.faces.component.UIComponent;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import javax.faces.convert.ConverterException;
import javax.imageio.ImageIO;
import org.primefaces.model.CroppedImage;
import org.primefaces.renderkit.CoreRenderer;
import org.primefaces.util.WidgetBuilder;
public class ImageCropperRenderer extends CoreRenderer {
@Override
public void decode(FacesContext context, UIComponent component) {
ImageCropper cropper = (ImageCropper) component;
Map<String,String> params = context.getExternalContext().getRequestParameterMap();
String coordsParam = cropper.getClientId(context) + "_coords";
if(params.containsKey(coordsParam)) {
cropper.setSubmittedValue(params.get(coordsParam));
}
}
@Override
public void encodeEnd(FacesContext context, UIComponent component) throws IOException {
ImageCropper cropper = (ImageCropper) component;
encodeMarkup(context, cropper);
encodeScript(context, cropper);
}
protected void encodeScript(FacesContext context, ImageCropper cropper) throws IOException{
String widgetVar = cropper.resolveWidgetVar();
String clientId = cropper.getClientId(context);
String image = clientId + "_image";
String select = null;
WidgetBuilder wb = getWidgetBuilder(context);
wb.initWithComponentLoad("ImageCropper", widgetVar, clientId, clientId + "_image", "imagecropper")
.attr("image", image);
if(cropper.getMinSize() != null)
wb.append(",minSize:[").append(cropper.getMinSize()).append("]");
if(cropper.getMaxSize() != null)
wb.append(",maxSize:[").append(cropper.getMaxSize()).append("]");
wb.attr("bgColor", cropper.getBackgroundColor(), null)
.attr("bgOpacity", cropper.getBackgroundOpacity(), 0.6)
.attr("aspectRatio", cropper.getAspectRatio(), Double.MIN_VALUE);
if(cropper.getValue() != null) {
CroppedImage croppedImage = (CroppedImage) cropper.getValue();
int x = croppedImage.getLeft();
int y = croppedImage.getTop();
int x2 = x + croppedImage.getWidth();
int y2 = y + croppedImage.getHeight();
select = "[" + x + "," + y + "," + x2 + "," + y2 + "]";
}
else if(cropper.getInitialCoords() != null) {
select = "[" + cropper.getInitialCoords() + "]";
}
wb.append(",setSelect:").append(select);
wb.finish();
}
protected void encodeMarkup(FacesContext context, ImageCropper cropper) throws IOException{
ResponseWriter writer = context.getResponseWriter();
String clientId = cropper.getClientId(context);
String coordsHolderId = clientId + "_coords";
writer.startElement("div", cropper);
writer.writeAttribute("id", clientId, null);
renderImage(context, cropper, clientId);
writer.startElement("input", null);
writer.writeAttribute("type", "hidden", null);
writer.writeAttribute("id", coordsHolderId, null);
writer.writeAttribute("name", coordsHolderId, null);
writer.endElement("input");
writer.endElement("div");
}
@Override
public Object getConvertedValue(FacesContext context, UIComponent component, Object submittedValue) throws ConverterException {
String coords = (String) submittedValue;
if(isValueBlank(coords)) {
return null;
}
ImageCropper cropper = (ImageCropper) component;
//remove query string
String imagePath = cropper.getImage();
int queryStringIndex = imagePath.indexOf("?");
if(queryStringIndex != -1 ) {
imagePath = imagePath.substring(0, queryStringIndex);
}
String[] cropCoords = coords.split("_");
String format = getFormat(imagePath);
int x = Integer.parseInt(cropCoords[0]);
int y = Integer.parseInt(cropCoords[1]);
int w = Integer.parseInt(cropCoords[2]);
int h = Integer.parseInt(cropCoords[3]);
try {
BufferedImage outputImage = getSourceImage(context, imagePath);
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 context, ImageCropper cropper, String clientId) throws IOException{
ResponseWriter writer = context.getResponseWriter();
String alt = cropper.getAlt() == null ? "" : cropper.getAlt();
writer.startElement("img", null);
writer.writeAttribute("id", clientId + "_image", null);
writer.writeAttribute("alt", alt, null);
writer.writeAttribute("src", getResourceURL(context, cropper.getImage()), null);
writer.endElement("img");
}
protected String getFormat(String path) {
String[] pathTokens = path.split("\\.");
return pathTokens[pathTokens.length - 1];
}
protected boolean isExternalImage(ImageCropper cropper) {
return cropper.getImage().startsWith("http");
}
private BufferedImage getSourceImage(FacesContext context, String imagePath) throws IOException {
BufferedImage outputImage = null;
boolean isExternal = imagePath.startsWith("http");
if(isExternal) {
URL url = new URL(imagePath);
outputImage = ImageIO.read(url);
}
else {
ExternalContext externalContext = context.getExternalContext();
outputImage = ImageIO.read(new File(externalContext.getRealPath("") + imagePath));
}
return outputImage;
}
}