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// ButtonRenderer.java
package renderkits.renderkit.xul;
import javax.faces.component.UICommand;
import javax.faces.component.UIComponent;
import javax.faces.component.UIForm;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import javax.faces.event.ActionEvent;
import java.io.IOException;
import java.util.Map;
import java.util.logging.Level;
import renderkits.util.Util;
/**
* <B>ButtonRenderer</B> is a class that renders the current value of
* <code>UICommand<code> as a Button.
*/
public class ButtonRenderer extends BaseRenderer {
//
// Protected Constants
//
//
// Class Variables
//
private static final String FORM_HAS_COMMAND_LINK_ATTR =
"com.sun.faces.FORM_HAS_COMMAND_LINK_ATTR";
private static final String NO_COMMAND_LINK_FOUND_VALUE =
"com.sun.faces.NO_COMMAND_LINK_FOUND";
//
// Instance Variables
//
// Attribute Instance Variables
// Relationship Instance Variables
//
// Constructors and Initializers
//
//
// Class methods
//
//
// General Methods
//
//
// Methods From Renderer
//
public void decode(FacesContext context, UIComponent component) {
if (context == null || component == null) {
// PENDING - i18n
throw new NullPointerException("'context' and/or 'component is null");
}
if (logger.isLoggable(Level.FINER)) {
logger.log(Level.FINER,
"Begin decoding component " + component.getId());
}
// If the component is disabled, do not change the value of the
// component, since its state cannot be changed.
if (Util.componentIsDisabledOnReadonly(component)) {
if (logger.isLoggable(Level.FINE)) {
logger.fine("No decoding necessary since the component " +
component.getId() + " is disabled");
}
return;
}
// Was our command the one that caused this submission?
String clientId = component.getClientId(context);
Map<String, String> requestParameterMap = context.getExternalContext()
.getRequestParameterMap();
String value = requestParameterMap.get(clientId);
if (value == null) {
if (requestParameterMap.get(clientId + ".x") == null &&
requestParameterMap.get(clientId + ".y") == null) {
return;
}
}
ActionEvent actionEvent = new ActionEvent(component);
component.queueEvent(actionEvent);
if (logger.isLoggable(Level.FINE)) {
logger.fine("This command resulted in form submission " +
" ActionEvent queued " + actionEvent);
}
if (logger.isLoggable(Level.FINER)) {
logger.log(Level.FINER,
"End decoding component " + component.getId());
}
return;
}
public void encodeBegin(FacesContext context, UIComponent component)
throws IOException {
if (context == null || component == null) {
// PENDING - i18n
throw new NullPointerException(
"'context' and/or 'component' is null");
}
if (logger.isLoggable(Level.FINER)) {
logger.log(Level.FINER,
"Begin encoding component " + component.getId());
}
// suppress rendering if "rendered" property on the component is
// false.
if (!component.isRendered()) {
if (logger.isLoggable(Level.FINER)) {
logger.log(Level.FINER,
"End encoding component " + component.getId() +
" since rendered attribute is set to false ");
}
return;
}
ResponseWriter writer = context.getResponseWriter();
// for text with rect positioning..
int dxi = 0, dyi = 0, xi = 0, yi = 0, heighti = 0;
String label = "";
Object value = ((UICommand) component).getValue();
if (value != null) {
label = value.toString();
}
writer.startElement("button", component);
writeIdAttributeIfNecessary(context, writer, component);
writer.writeAttribute("label", label, "label");
String type = (String) component.getAttributes().get("type");
if (type != null && type.equals("submit")) {
UIComponent root = context.getViewRoot();
UIComponent myForm = component;
while (!(myForm instanceof UIForm) && root != myForm) {
myForm = myForm.getParent();
}
String formMethodName =
myForm.getClientId(context) + "_post(event)";
writer.writeAttribute("onclick", formMethodName, "onclick");
} else {
String onclick = (String) component.getAttributes().get("onclick");
if (onclick != null) {
writer.writeAttribute("onclick", onclick, "onclick");
}
}
writer.writeText("\n", null);
if (logger.isLoggable(Level.FINER)) {
logger.log(Level.FINER,
"End encoding component " + component.getId());
}
}
public void encodeEnd(FacesContext context, UIComponent component)
throws IOException {
if (context == null || component == null) {
// PENDING - i18n
throw new NullPointerException(
"'context' and/or 'component' is null");
}
ResponseWriter writer = context.getResponseWriter();
writer.endElement("button");
writer.writeText("\n", null);
}
//
// General Methods
//
} // end of class ButtonRenderer