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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.myfaces.shared_tomahawk.renderkit.html;
import org.apache.myfaces.shared_tomahawk.config.MyfacesConfig;
import org.apache.myfaces.shared_tomahawk.renderkit.RendererUtils;
import org.apache.myfaces.shared_tomahawk.renderkit.JSFAttr;
import org.apache.myfaces.shared_tomahawk.renderkit.html.util.FormInfo;
import javax.faces.FacesException;
import javax.faces.application.ViewHandler;
import javax.faces.component.UIComponent;
import javax.faces.component.UIForm;
import javax.faces.component.html.HtmlForm;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import java.io.IOException;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
/**
* @author Manfred Geiler (latest modification by $Author: skitching $)
* @author Thomas Spiegl
* @author Anton Koinov
* @version $Revision: 673826 $ $Date: 2008-07-03 16:43:52 -0500 (Thu, 03 Jul 2008) $
*/
public class HtmlFormRendererBase
extends HtmlRenderer {
//private static final Log log = LogFactory.getLog(HtmlFormRenderer.class);
private static final String HIDDEN_SUBMIT_INPUT_SUFFIX = "_SUBMIT";
private static final String HIDDEN_SUBMIT_INPUT_VALUE = "1";
private static final String HIDDEN_COMMAND_INPUTS_SET_ATTR
= UIForm.class.getName() + ".org.apache.myfaces.HIDDEN_COMMAND_INPUTS_SET";
private static final String VALIDATE_CONTEXT_PARAM = "org.apache.myfaces.VALIDATE";
private static final String SCROLL_HIDDEN_INPUT = "org.apache.myfaces.SCROLL_HIDDEN_INPUT";
/**
* Okay, we're going far for compatibility here, but well, we ought to.
* this is the parameter that is set with the form id in the RI
* if you don't set this parameter, buttons in the RI 1.1. won't work with your form
* failing with a javascript error.
*
* nice, eh?
*
* fixed in the RI in 1.2
*
* if you want to know more, search for this comment in the 1.1. RI sources:
*
* // look up the clientId of the form in request scope to arrive the name of
* // the javascript function to invoke from the onclick event handler.
* // PENDING (visvan) we need to fix this dependency between the renderers.
* // This solution is only temporary.
*/
private static final String FORM_CLIENT_ID_ATTR = "com.sun.faces.FORM_CLIENT_ID_ATTR";
public void encodeBegin(FacesContext facesContext, UIComponent component)
throws IOException {
org.apache.myfaces.shared_tomahawk.renderkit.RendererUtils.checkParamValidity(facesContext, component, UIForm.class);
// see comment for FORM_CLIENT_ID_ATTR above - this is entirely for compatibility with RI in version 1.1
//todo: move out for 1.2!
facesContext.getExternalContext().getRequestMap().put(FORM_CLIENT_ID_ATTR,
component.getClientId(facesContext));
if ("true".equals(facesContext.getExternalContext().getInitParameter(VALIDATE_CONTEXT_PARAM))) { //todo: should go to MyfacesConfig class!
FormInfo info = RendererUtils.findNestingForm(component, facesContext);
if (info != null && info.getForm() != null) {
throw new FacesException("You should never nest HTML-forms. " +
"This leads to unpredictable behaviour in all major browsers. " +
"You can use multiple forms on a page, but they may not be nested!" +
"If you need to disable this check (on your own risk!) set the param " +
"org.apache.myfaces.VALIDATE in your web.xml context parameters to false");
}
}
UIForm htmlForm = (UIForm) component;
ResponseWriter writer = facesContext.getResponseWriter();
String clientId = htmlForm.getClientId(facesContext);
String actionURL = getActionUrl(facesContext, htmlForm);
String method = getMethod(facesContext, htmlForm);
String acceptCharset = getAcceptCharset(facesContext, htmlForm);
writer.startElement(HTML.FORM_ELEM, htmlForm);
writer.writeAttribute(HTML.ID_ATTR, clientId, null);
writer.writeAttribute(HTML.NAME_ATTR, clientId, null);
writer.writeAttribute(HTML.METHOD_ATTR, method, null);
if((acceptCharset != null) && (acceptCharset.compareTo("")!=0)) writer.writeAttribute(HTML.ACCEPT_CHARSET_ATTR, acceptCharset, null);
writer.writeURIAttribute(HTML.ACTION_ATTR,
facesContext.getExternalContext().encodeActionURL(actionURL),
null);
HtmlRendererUtils.renderHTMLAttributes(writer, htmlForm, HTML.FORM_PASSTHROUGH_ATTRIBUTES);
writer.write(""); // force start element tag to be closed
// not needed in this version as nothing is written to the form tag, but
// included for backward compatibility to the 1.1.1 patch (JIRA MYFACES-1276)
// However, might be needed in the future
beforeFormElementsStart(facesContext, component);
afterFormElementsStart(facesContext, component);
}
protected String getActionUrl(FacesContext facesContext, UIForm form) {
return getActionUrl(facesContext);
}
protected String getMethod(FacesContext facesContext, UIForm form) {
return "post";
}
protected String getAcceptCharset(FacesContext facesContext, UIForm form ) {
return (String)form.getAttributes().get( JSFAttr.ACCEPTCHARSET_ATTR );
}
public void encodeEnd(FacesContext facesContext, UIComponent component)
throws IOException {
ResponseWriter writer = facesContext.getResponseWriter();
beforeFormElementsEnd(facesContext, component);
//write hidden input to determine "submitted" value on decode
writer.startElement(HTML.INPUT_ELEM, component);
writer.writeAttribute(HTML.TYPE_ATTR, HTML.INPUT_TYPE_HIDDEN, null);
writer.writeAttribute(HTML.NAME_ATTR, component.getClientId(facesContext) +
HIDDEN_SUBMIT_INPUT_SUFFIX, null);
writer.writeAttribute(HTML.VALUE_ATTR, HIDDEN_SUBMIT_INPUT_VALUE, null);
writer.endElement(HTML.INPUT_ELEM);
renderScrollHiddenInputIfNecessary(component, facesContext, writer);
/*
see JspViewHandlerImpl.writeState(...)
if(!facesContext.getApplication().getStateManager().isSavingStateInClient(facesContext))
{
writer.startElement(HTML.INPUT_ELEM, component);
writer.writeAttribute(HTML.TYPE_ATTR, HTML.INPUT_TYPE_HIDDEN, null);
writer.writeAttribute(HTML.NAME_ATTR, org.apache.myfaces.shared_tomahawk.renderkit.RendererUtils.SEQUENCE_PARAM, null);
writer.writeAttribute(org.apache.myfaces.shared_tomahawk.renderkit.html.HTML.VALUE_ATTR, org.apache.myfaces.shared_tomahawk.renderkit.RendererUtils.getViewSequence(facesContext), null);
writer.endElement(HTML.INPUT_ELEM);
}
*/
//render hidden command inputs
Set set = (Set) facesContext.getExternalContext().getRequestMap().get(
getHiddenCommandInputsSetName(facesContext, component));
if (set != null && !set.isEmpty()) {
HtmlRendererUtils.renderHiddenCommandFormParams(writer, set);
String target;
if (component instanceof HtmlForm) {
target = ((HtmlForm) component).getTarget();
}
else {
target = (String) component.getAttributes().get(HTML.TARGET_ATTR);
}
HtmlRendererUtils.renderClearHiddenCommandFormParamsFunction(writer,
component.getClientId(facesContext),
set,
target);
}
//write state marker at the end of the form
//Todo: this breaks client-side enabled AJAX components again which are searching for the state
//we'll need to fix this
ViewHandler viewHandler = facesContext.getApplication().getViewHandler();
viewHandler.writeState(facesContext);
afterFormElementsEnd(facesContext, component);
writer.endElement(HTML.FORM_ELEM);
}
private static String getHiddenCommandInputsSetName(FacesContext facesContext, UIComponent form) {
StringBuffer buf = new StringBuffer();
buf.append(HIDDEN_COMMAND_INPUTS_SET_ATTR);
buf.append("_");
buf.append(form.getClientId(facesContext));
return buf.toString();
}
private static String getScrollHiddenInputName(FacesContext facesContext, UIComponent form) {
StringBuffer buf = new StringBuffer();
buf.append(SCROLL_HIDDEN_INPUT);
buf.append("_");
buf.append(form.getClientId(facesContext));
return buf.toString();
}
public void decode(FacesContext facesContext, UIComponent component) {
org.apache.myfaces.shared_tomahawk.renderkit.RendererUtils.checkParamValidity(facesContext, component, UIForm.class);
/*
if (HTMLUtil.isDisabled(component))
{
return;
}
*/
UIForm htmlForm = (UIForm) component;
Map paramMap = facesContext.getExternalContext().getRequestParameterMap();
String submittedValue = (String) paramMap.get(component.getClientId(facesContext) +
HIDDEN_SUBMIT_INPUT_SUFFIX);
if (submittedValue != null && submittedValue.equals(HIDDEN_SUBMIT_INPUT_VALUE)) {
htmlForm.setSubmitted(true);
}
else {
htmlForm.setSubmitted(false);
}
}
public static void addHiddenCommandParameter(FacesContext facesContext, UIComponent form, String paramName) {
Set set = (Set) facesContext.getExternalContext().getRequestMap().get(getHiddenCommandInputsSetName(facesContext, form));
if (set == null) {
set = new HashSet();
facesContext.getExternalContext().getRequestMap().put(getHiddenCommandInputsSetName(facesContext, form), set);
}
set.add(paramName);
}
public static void renderScrollHiddenInputIfNecessary(UIComponent form, FacesContext facesContext, ResponseWriter writer)
throws IOException {
if (form == null) {
return;
}
if (facesContext.getExternalContext().getRequestMap().get(getScrollHiddenInputName(facesContext, form)) == null)
{
if (MyfacesConfig.getCurrentInstance(facesContext.getExternalContext()).isAutoScroll()) {
HtmlRendererUtils.renderAutoScrollHiddenInput(facesContext, writer);
}
facesContext.getExternalContext().getRequestMap().put(getScrollHiddenInputName(facesContext, form), Boolean.TRUE);
}
}
/**
* Called before the state and any elements are added to the form tag in the
* encodeBegin method
*/
protected void beforeFormElementsStart(FacesContext facesContext, UIComponent component)
throws IOException {
}
/**
* Called after the state and any elements are added to the form tag in the
* encodeBegin method
*/
protected void afterFormElementsStart(FacesContext facesContext, UIComponent component)
throws IOException {
}
/**
* Called before the state and any elements are added to the form tag in the
* encodeEnd method
*/
protected void beforeFormElementsEnd(FacesContext facesContext, UIComponent component)
throws IOException {
}
/**
* Called after the state and any elements are added to the form tag in the
* encodeEnd method
*/
protected void afterFormElementsEnd(FacesContext facesContext, UIComponent component)
throws IOException {
}
}
