package org.eclipse.iee.web.renderer;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
import java.io.Writer;
import java.util.HashMap;
import javax.imageio.ImageIO;
import org.eclipse.iee.pad.formula.InputPart;
import org.eclipse.iee.pad.formula.image.FormulaImageRenderer;
import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.Reference;
import org.osgi.service.component.annotations.ReferencePolicy;
@Component
public class InputHTMLRenderer implements IHTMLRenderer<InputPart> {
private FormulaImageRenderer formulaImageRenderer;
@Override
public void renderPad(InputPart pad,
IHTMLRendererContext context) throws IOException {
Writer writer = context.getWriter();
writer.append("<img src='").append(context.createResourceURL(pad.getId(), "formula", new HashMap<String, String>())).append("' />");
if (!context.isEditMode()) {
HashMap<String, String> params = new HashMap<String, String>();
writer.append("<img src='").append(context.createResourceURL(pad.getId(), "result", params)).append("' />");
} else {
writer.append("<input name='").append(pad.getId()).append("' type='text' value='").append(getValue(pad, context)).append("'/>");
}
}
@Override
public void renderResource(InputPart pad, String resourceId, IResourceRenderContext context)
throws IOException {
String text;
if (!"result".equals(resourceId)) {
text = pad.getVariable() + "=";
} else {
String result = getValue(pad, context);
text = result;
}
BufferedImage image = formulaImageRenderer.getFormulaImage(text, java.awt.Color.black, null);
context.setContentType("image/png");
OutputStream outputStream = context.getOutputStream();
ImageIO.write(image, "png", outputStream);
}
private String getValue(InputPart pad, IHTMLRendererContext context) {
String result = context.getParameterProvider().getParameterValue(pad.getId());
if (result == null) {
result = pad.getDefaultValue();
}
return result;
}
@Reference(unbind = "unbindFormulaImageRenderer", policy = ReferencePolicy.DYNAMIC)
public void bindFormulaImageRenderer(FormulaImageRenderer renderer) {
formulaImageRenderer = renderer;
}
public void unbindFormulaImageRenderer(FormulaImageRenderer renderer) {
formulaImageRenderer = renderer;
}
}