Examples of javax.faces.application.ViewHandler

javax.faces.application.ViewHandler

ViewHandler is the pluggablity mechanism for allowing implementations of or applications using the JavaServer Faces specification to provide their own handling of the activities in the Render Response and Restore View phases of the request processing lifecycle. This allows for implementations to support different response generation technologies, as well as alternative strategies for saving and restoring the state of each view.

Please see {@link StateManager} for information on how theViewHandler interacts the {@link StateManager}.

        HtmlRendererUtils.renderHTMLAttributes(out, graphicImageAjax, HTML.IMG_PASSTHROUGH_ATTRIBUTES);


        out.endElement(HTML.IMG_ELEM);


        String viewId = context.getViewRoot().getViewId();
        ViewHandler viewHandler = context.getApplication().getViewHandler();
        String actionURL = viewHandler.getActionURL(context, viewId);


        out.startElement(HTML.SCRIPT_ELEM, null);
        out.writeAttribute(HTML.TYPE_ATTR, "text/javascript", null);
        out.writeText("document.getElementById('"+clientId+"').src='",null);
        out.writeText(context.getExternalContext().encodeActionURL(actionURL+"?affectedGraphicImageComponent="+clientId),null);

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  }


  private String generateUrl(FacesContext facesContext, UIComponent component) {
    String url;
    Application application = facesContext.getApplication();
    ViewHandler viewHandler = application.getViewHandler();


    String link = (String) component.getAttributes().get(ATTR_ACTION_LINK);
    if (link.startsWith("/")) { // internal URL
      url = viewHandler.getActionURL(facesContext, link);
    } else { // external URL
      url = link;
    }


    url = facesContext.getExternalContext().encodeActionURL(url);

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    boolean gotHeight = (heightParam != null);


    String viewIdRedirect = requestParameters.get(_VIEW_ID_REDIRECT_PARAM);
    if (viewIdRedirect != null)
    {
      ViewHandler vh =
        context.getApplication().getViewHandler();
      // Prepend an extra slash to avoid re-prepending the context path
      String redirectString = "/" + vh.getActionURL(context,
                                                    viewIdRedirect);
      // if redirectString contains ?, append queryString with &,
      // otherwise append queryString with &
      char sep = (redirectString.indexOf('?') != -1) ? '&' : '?';
      contentFrame.setSource(redirectString + sep + queryString);

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    else
    {
      rw.writeAttribute("style", "padding-right: 5px; float: left;", null);
    }
    Application application = context.getApplication();
    ViewHandler handler = application.getViewHandler();
    String resolvedIconUri = handler.getResourceURL(context, iconUri);
    renderEncodedResourceURI(context, "src", resolvedIconUri);
    rw.endElement("img");
  }

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    return __ENTRY_KEY_PARAM;
  }


  public static UIViewRoot getGenericEntryViewRoot(FacesContext context)
  {
    ViewHandler viewHandler = context.getApplication().getViewHandler();
    UIViewRoot uvr = viewHandler.createView(context, _GENERIC_ENTRY_VIEW_ID);
    return uvr;
  }

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      _inited = true;
      String alternateViewHandler =
        context.getExternalContext().getInitParameter(ALTERNATE_VIEW_HANDLER);
      if (alternateViewHandler != null)
      {
        ViewHandler viewHandlerInstance = null;
        try
        {
          ClassLoader loader = Thread.currentThread().getContextClassLoader();
          Class<?> c = loader.loadClass(alternateViewHandler);
          try

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        LOG.debug("*** '" + entry.getKey() + "' -> '" + entry.getValue() + "'");
      }
    }


    Application application = facesContext.getApplication();
    ViewHandler viewHandler = application.getViewHandler();
    String viewId = facesContext.getViewRoot().getViewId();
    String formAction = viewHandler.getActionURL(facesContext, viewId);
    formAction = facesContext.getExternalContext().encodeActionURL(formAction);
    String charset = (String) page.getAttributes().get(ATTR_CHARSET);
    ResponseUtils.ensureContentTypeHeader(facesContext, charset);


    String title = (String) page.getAttributes().get(ATTR_LABEL);


    String doctype = generateDoctype(page);


    if (doctype != null) {
      writer.write(doctype);
      writer.write("\n");
    }


    writer.startElement(HtmlConstants.HTML, null);
    writer.startElement(HtmlConstants.HEAD, null);


    writer.writeJavascript("var TbgHeadStart = new Date();");


    // meta
    // TODO duplicate; see PageTag.doStartTag()
//    writer.startElement(HtmlConstants.META, null);
//    writer.writeAttribute("http-equiv", "Content-Type", null);
//    writer.writeAttribute(
//        "content", generateContentType(facesContext, charset), null);
//    writer.endElement(HtmlConstants.META);
    // title
    writer.startElement(HtmlConstants.TITLE, null);
    writer.writeText(title != null ? title : "");
    writer.endElement(HtmlConstants.TITLE);


    // style files
    for (String styleFile : page.getStyleFiles()) {
      List<String> styles = ResourceManagerUtil.getStyles(facesContext, styleFile);
      for (String styleString : styles) {
        if (styleString.length() > 0) {
          writer.startElement(HtmlConstants.LINK, null);
          writer.writeAttribute(HtmlAttributes.REL, "stylesheet", false);
          writer.writeAttribute(HtmlAttributes.HREF, styleString, false);
//          writer.writeAttribute(HtmlAttributes.MEDIA, "screen", false);
          writer.writeAttribute(HtmlAttributes.TYPE, "text/css", false);
          writer.endElement(HtmlConstants.LINK);
        }
      }
    }


    String icon = page.getApplicationIcon();
    if (icon != null) {
      // XXX unify with image renderer
      if (icon.startsWith("HTTP:") || icon.startsWith("FTP:")
          || icon.startsWith("/")) {
        // absolute Path to image : nothing to do
      } else {
        icon = ResourceManagerUtil.getImageWithPath(facesContext, icon);
      }


      writer.startElement(HtmlConstants.LINK, null);
      if (icon.endsWith(".ico")) {
        writer.writeAttribute(HtmlAttributes.REL, "shortcut icon", false);
        writer.writeAttribute(HtmlAttributes.HREF, icon, false);
      } else {
        // XXX IE only supports ICO files for favicons
        writer.writeAttribute(HtmlAttributes.REL, "icon", false);
        writer.writeAttribute(HtmlAttributes.TYPE, MimeTypeUtils.getMimeTypeForFile(icon), false);
        writer.writeAttribute(HtmlAttributes.HREF, icon, false);
      }
      writer.endElement(HtmlConstants.LINK);
    }


    // style sniplets
    Set<String> styleBlocks = page.getStyleBlocks();
    if (styleBlocks.size() > 0) {
      writer.startElement(HtmlConstants.STYLE, null);
      for (String cssBlock : styleBlocks) {
        writer.write(cssBlock);
      }
      writer.endElement(HtmlConstants.STYLE);
    }


    // script files
    List<String> scriptFiles = page.getScriptFiles();
    // prototype.js and tobago.js needs to be first!
    addScripts(writer, facesContext, "script/prototype.js");
    addScripts(writer, facesContext, "script/tobago.js");
    addScripts(writer, facesContext, "script/theme-config.js");
    // remove  prototype.js and tobago.js from list to prevent dublicated rendering of script tags
    scriptFiles.remove("script/prototype.js");
    scriptFiles.remove("script/tobago.js");
    scriptFiles.remove("script/theme-config.js");


    int clientLogSeverity = 2;
    boolean hideClientLogging = true;
    final boolean debugMode =
        ClientProperties.getInstance(facesContext.getViewRoot()).isDebugMode();
//        true; hideClientLogging = false;
    if (debugMode) {
      String severity = (String) facesContext.getExternalContext().getRequestMap().get(CLIENT_DEBUG_SEVERITY);
      LOG.info("get " + CLIENT_DEBUG_SEVERITY + " = " + severity);
      if (severity != null) {
        try {
          int index = severity.indexOf(';');
          if (index == -1) {
            index = severity.length();
          }
          clientLogSeverity = Integer.parseInt(severity.substring(0, index));
        } catch (NumberFormatException e) {/* ignore; use default*/ }
        hideClientLogging = !severity.contains("show");
      }
      scriptFiles.add("script/effects.js");
      scriptFiles.add("script/dragdrop.js");
      scriptFiles.add("script/logging.js");
    }


    // render remaining script tags
    for (String scriptFile : scriptFiles) {
      addScripts(writer, facesContext, scriptFile);
    }


    // focus id
    String focusId = page.getFocusId();
    if (focusId != null) {
      writer.writeJavascript("Tobago.focusId = '" + focusId + "';");
    }


    if (component.getFacets().containsKey(FACET_ACTION)) {
      UIComponent command = component.getFacet(FACET_ACTION);
      if (command != null && command.isRendered()) {
        int duration = ComponentUtil.getIntAttribute(command, ATTR_DELAY, 100);
        boolean transition = ComponentUtil.getBooleanAttribute(command, ATTR_TRANSITION);
        String target = ComponentUtil.getStringAttribute(command, ATTR_TARGET);
        String action;
        if (target != null) {
          action = "Tobago.submitAction('" + command.getClientId(facesContext) + "', " 
                  + transition + ", '" + target + "' )";
        } else {
          action = "Tobago.submitAction('"+ command.getClientId(facesContext) + "', " + transition + " )";
        }
        page.getOnloadScripts().add("setTimeout(\"" + action  + "\", " + duration + ");\n");
      }
    }
    StringBuilder script = new StringBuilder();


    // onload script
    writeEventFunction(script, page.getOnloadScripts(), "load", false);


    // onunload script
    writeEventFunction(script, page.getOnunloadScripts(), "unload", false);


    // onexit script
    writeEventFunction(script, page.getOnexitScripts(), "exit", false);


    writeEventFunction(script, page.getOnsubmitScripts(), "submit", true);


   int debugCounter = 0;
    for (String scriptBlock : page.getScriptBlocks()) {


      if (LOG.isDebugEnabled()) {
        LOG.debug("write scriptblock " + ++debugCounter + " :\n" + scriptBlock);
      }
      script.append(scriptBlock);
      script.append('\n');
    }
    writer.writeJavascript(script.toString());


    String clientId = page.getClientId(facesContext);


    String defaultActionId = page.getDefaultActionId() != null ? page.getDefaultActionId() : "";
    writer.endElement(HtmlConstants.HEAD);
    writer.startElement(HtmlConstants.BODY, page);
    writer.writeAttribute(HtmlAttributes.ONLOAD, "Tobago.init('" + clientId + "');", false);
//    writer.writeAttribute("onunload", "Tobago.onexit();", null);
    //this ist for ie to prevent scrollbars where none are needed
    writer.writeAttribute(HtmlAttributes.SCROLL, "auto", false);
    writer.writeClassAttribute();
    writer.writeIdAttribute(clientId);


    StringBuilder images = new StringBuilder();
    images.append("Tobago.pngFixBlankImage = '");
    images.append(ResourceManagerUtil.getImageWithPath(facesContext, "image/blank.gif"));
    images.append("';\n");
    images.append("Tobago.OVERLAY_BACKGROUND = '");
    images.append(ResourceManagerUtil.getImageWithPath(facesContext, "image/tobago-overlay-background.png"));
    images.append("';\n");
    images.append("Tobago.OVERLAY_WAIT = '");
    images.append(ResourceManagerUtil.getImageWithPath(facesContext, "image/tobago-overlay-wait.gif"));
    images.append("';\n");
    writer.writeJavascript(images.toString());


    if (debugMode) {
      final String[] jsFiles = new String[]{
          "script/effects.js",
          "script/dragdrop.js",
          "script/logging.js"
      };
      final String[] jsCommand = new String[]{"new LOG.LogArea({hide: " + hideClientLogging + "});"};
      HtmlRendererUtil.writeScriptLoader(facesContext, jsFiles, jsCommand);
    }
    writer.writeJavascript("TbgTimer.startBody = new Date();");


    writer.startElement(HtmlConstants.FORM, page);
    writer.writeNameAttribute(
        clientId + SUBCOMPONENT_SEP + "form");
    writer.writeAttribute(HtmlAttributes.ACTION, formAction, true);
    writer.writeIdAttribute(page.getFormId(facesContext));
    writer.writeAttribute(HtmlAttributes.METHOD, getMethod(page), false);
    writer.writeAttributeFromComponent(HtmlAttributes.ENCTYPE, ATTR_ENCTYPE);
    // TODO: enable configuration of  'accept-charset'
    writer.writeAttribute(HtmlAttributes.ACCEPT_CHARSET, FORM_ACCEPT_CHARSET, false);


    writer.startElement(HtmlConstants.INPUT, null);
    writer.writeAttribute(HtmlAttributes.TYPE, "hidden", false);
    writer.writeNameAttribute(
        clientId + SUBCOMPONENT_SEP + "form-action");
    writer.writeIdAttribute(
        clientId + SUBCOMPONENT_SEP + "form-action");
    writer.writeAttribute(HtmlAttributes.VALUE, defaultActionId, true);
    writer.endElement(HtmlConstants.INPUT);


    if (debugMode) {
      writer.startElement(HtmlConstants.INPUT, null);
      writer.writeAttribute(HtmlAttributes.VALUE, clientLogSeverity);
      writer.writeAttribute(HtmlAttributes.ID, clientId + SUBCOMPONENT_SEP + "clientSeverity", false);
      writer.writeAttribute(HtmlAttributes.NAME, clientId + SUBCOMPONENT_SEP + "clientSeverity", false);
      writer.writeAttribute(HtmlAttributes.TYPE, "hidden", false);
      writer.endElement(HtmlConstants.INPUT);
    }


    if (component.getFacet("backButtonDetector") != null) {
      UIComponent hidden = component.getFacet("backButtonDetector");
      RenderUtil.encode(facesContext, hidden);
    }


    //checkForCommandFacet(component, facesContext, writer);


// TODO: this is needed for the "BACK-BUTTON-PROBLEM"
// but may no longer needed
/*
    if (ViewHandlerImpl.USE_VIEW_MAP) {
      writer.startElement(HtmlConstants.INPUT, null);
      writer.writeAttribute(HtmlAttributes.TYPE, "hidden", null);
      writer.writeNameAttribute(ViewHandlerImpl.PAGE_ID);
      writer.writeIdAttribute(ViewHandlerImpl.PAGE_ID);
      Object value = facesContext.getViewRoot().getAttributes().get(
          ViewHandlerImpl.PAGE_ID);
      writer.writeAttribute(HtmlAttributes.VALUE, (value != null ? value : ""), null);
      writer.endElement(HtmlConstants.INPUT);
    }
*/


    // write the proviously rendered page content
    writer.write(content.toString());


    // write the previously rendered popups
    writer.write(popups.toString());


    writer.startElement(HtmlConstants.SPAN, null);
    writer.writeIdAttribute(clientId + SUBCOMPONENT_SEP + "jsf-state-container");
    writer.flush();
    viewHandler.writeState(facesContext);
    writer.endElement(HtmlConstants.SPAN);


//    facesContext.getApplication().getViewHandler().writeState(facesContext);


    writer.endElement(HtmlConstants.FORM);

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        LOG.debug("*** '" + entry.getKey() + "' -> '" + entry.getValue() + "'");
      }
    }


    Application application = facesContext.getApplication();
    ViewHandler viewHandler = application.getViewHandler();
    String viewId = facesContext.getViewRoot().getViewId();
    String formAction = viewHandler.getActionURL(facesContext, viewId);
    formAction = facesContext.getExternalContext().encodeActionURL(formAction);
    String contentType = writer.getContentTypeWithCharSet();
    ResponseUtils.ensureContentTypeHeader(facesContext, contentType);


    String title = (String) page.getAttributes().get(ATTR_LABEL);


    String doctype = generateDoctype(page);


    if (doctype != null) {
      writer.write(doctype);
      writer.write("\n");
    }


    writer.startElement(HtmlConstants.HTML, null);
    writer.startElement(HtmlConstants.HEAD, null);
    final boolean debugMode =
            ClientProperties.getInstance(facesContext.getViewRoot()).isDebugMode();


    //if (debugMode) {
    writer.writeJavascript("var TbgHeadStart = new Date();");
    //}


    // meta
    // this is needed, because websphere 6.0? ignores the setting of the content type on the response
    writer.startElement(HtmlConstants.META, null);
    writer.writeAttribute("http-equiv", "Content-Type", false);
    writer.writeAttribute("content", contentType, false);
    writer.endElement(HtmlConstants.META);


    // title
    writer.startElement(HtmlConstants.TITLE, null);
    writer.writeText(title != null ? title : "");
    writer.endElement(HtmlConstants.TITLE);


    // style files
    for (String styleFile : page.getStyleFiles()) {
      List<String> styles = ResourceManagerUtil.getStyles(facesContext, styleFile);
      for (String styleString : styles) {
        if (styleString.length() > 0) {
          writer.startElement(HtmlConstants.LINK, null);
          writer.writeAttribute(HtmlAttributes.REL, "stylesheet", false);
          writer.writeAttribute(HtmlAttributes.HREF, styleString, false);
//          writer.writeAttribute(HtmlAttributes.MEDIA, "screen", false);
          writer.writeAttribute(HtmlAttributes.TYPE, "text/css", false);
          writer.endElement(HtmlConstants.LINK);
        }
      }
    }


    String icon = page.getApplicationIcon();
    if (icon != null) {
      // XXX unify with image renderer
      if (icon.startsWith("HTTP:") || icon.startsWith("FTP:")
          || icon.startsWith("/")) {
        // absolute Path to image : nothing to do
      } else {
        icon = ResourceManagerUtil.getImageWithPath(facesContext, icon);
      }


      writer.startElement(HtmlConstants.LINK, null);
      if (icon.endsWith(".ico")) {
        writer.writeAttribute(HtmlAttributes.REL, "shortcut icon", false);
        writer.writeAttribute(HtmlAttributes.HREF, icon, false);
      } else {
        // XXX IE only supports ICO files for favicons
        writer.writeAttribute(HtmlAttributes.REL, "icon", false);
        writer.writeAttribute(HtmlAttributes.TYPE, MimeTypeUtils.getMimeTypeForFile(icon), false);
        writer.writeAttribute(HtmlAttributes.HREF, icon, false);
      }
      writer.endElement(HtmlConstants.LINK);
    }


    // style sniplets
    Set<String> styleBlocks = page.getStyleBlocks();
    if (styleBlocks.size() > 0) {
      writer.startElement(HtmlConstants.STYLE, null);
      for (String cssBlock : styleBlocks) {
        writer.write(cssBlock);
      }
      writer.endElement(HtmlConstants.STYLE);
    }


    // script files
    List<String> scriptFiles = page.getScriptFiles();
    // prototype.js and tobago.js needs to be first!
    addScripts(writer, facesContext, "script/prototype.js");
    addScripts(writer, facesContext, "script/tobago.js");
    addScripts(writer, facesContext, "script/theme-config.js");
    // remove  prototype.js and tobago.js from list to prevent dublicated rendering of script tags
    scriptFiles.remove("script/prototype.js");
    scriptFiles.remove("script/tobago.js");
    scriptFiles.remove("script/theme-config.js");


    int clientLogSeverity = 2;
    boolean hideClientLogging = true;
    //        true; hideClientLogging = false;
    if (debugMode) {
      String severity = (String) facesContext.getExternalContext().getRequestMap().get(CLIENT_DEBUG_SEVERITY);
      LOG.info("get " + CLIENT_DEBUG_SEVERITY + " = " + severity);
      if (severity != null) {
        try {
          int index = severity.indexOf(';');
          if (index == -1) {
            index = severity.length();
          }
          clientLogSeverity = Integer.parseInt(severity.substring(0, index));
        } catch (NumberFormatException e) {/* ignore; use default*/ }
        hideClientLogging = !severity.contains("show");
      }
      scriptFiles.add("script/effects.js");
      scriptFiles.add("script/dragdrop.js");
      scriptFiles.add("script/logging.js");
    }


    // render remaining script tags
    for (String scriptFile : scriptFiles) {
      addScripts(writer, facesContext, scriptFile);
    }


    // focus id
    String focusId = page.getFocusId();
    if (focusId != null) {
      writer.writeJavascript("Tobago.focusId = '" + focusId + "';");
    }


    if (component.getFacets().containsKey(FACET_ACTION)) {
      UIComponent command = component.getFacet(FACET_ACTION);
      if (command != null && command.isRendered()) {
        int duration = ComponentUtil.getIntAttribute(command, ATTR_DELAY, 100);
        boolean transition = ComponentUtil.getBooleanAttribute(command, ATTR_TRANSITION);
        String target = ComponentUtil.getStringAttribute(command, ATTR_TARGET);
        String action;
        if (target != null) {
          action = "Tobago.submitAction2(this, '" + command.getClientId(facesContext) + "', "
              + transition + ", '" + target + "')";
        } else {
          action = "Tobago.submitAction2(this, '"+ command.getClientId(facesContext) + "', "
              + transition + ", null)";
        }
        page.getOnloadScripts().add("setTimeout(\"" + action  + "\", " + duration + ");\n");
      }
    }


    if (component.getFacets().containsKey(FACET_RESIZE_ACTION)) {
      UIComponent facet = component.getFacet(FACET_RESIZE_ACTION);
      UIComponent command = null;
      if (facet instanceof UICommand) {
        command = facet;
      } else if (facet instanceof UIForm && facet.getChildCount() == 1) {
        command = (UIComponent) facet.getChildren().get(0);
      }
      if (command != null && command.isRendered()) {
        writer.writeJavascript("Tobago.resizeActionId = '" + command.getClientId(facesContext) + "';");
      }
    }


    StringBuilder script = new StringBuilder(128);


    // onload script
    writeEventFunction(script, page.getOnloadScripts(), "load", false);


    // onunload script
    writeEventFunction(script, page.getOnunloadScripts(), "unload", false);


    // onexit script
    writeEventFunction(script, page.getOnexitScripts(), "exit", false);


    writeEventFunction(script, page.getOnsubmitScripts(), "submit", true);


   int debugCounter = 0;
    for (String scriptBlock : page.getScriptBlocks()) {


      if (LOG.isDebugEnabled()) {
        LOG.debug("write scriptblock " + ++debugCounter + " :\n" + scriptBlock);
      }
      script.append(scriptBlock);
      script.append('\n');
    }
    writer.writeJavascript(script.toString());


    String clientId = page.getClientId(facesContext);


    String defaultActionId = page.getDefaultActionId() != null ? page.getDefaultActionId() : "";
    writer.endElement(HtmlConstants.HEAD);
    writer.startElement(HtmlConstants.BODY, page);
    writer.writeAttribute(HtmlAttributes.ONLOAD, "Tobago.init('" + clientId + "');", false);
//    writer.writeAttribute("onunload", "Tobago.onexit();", null);
    //this ist for ie to prevent scrollbars where none are needed
    writer.writeAttribute(HtmlAttributes.SCROLL, "auto", false);
    writer.writeClassAttribute();
    writer.writeIdAttribute(clientId);


    StringBuilder images = new StringBuilder(256);
    images.append("Tobago.pngFixBlankImage = '");
    images.append(ResourceManagerUtil.getImageWithPath(facesContext, "image/blank.gif"));
    images.append("';\n");
    images.append("Tobago.OVERLAY_BACKGROUND = '");
    images.append(ResourceManagerUtil.getImageWithPath(facesContext, "image/tobago-overlay-background.png"));
    images.append("';\n");
    images.append("Tobago.OVERLAY_WAIT = '");
    images.append(ResourceManagerUtil.getImageWithPath(facesContext, "image/tobago-overlay-wait.gif"));
    images.append("';\n");
    writer.writeJavascript(images.toString());


    if (debugMode) {
      final String[] jsFiles = new String[]{
          "script/effects.js",
          "script/dragdrop.js",
          "script/logging.js"
      };
      final String[] jsCommand = new String[]{"new LOG.LogArea({hide: " + hideClientLogging + "});"};
      HtmlRendererUtil.writeScriptLoader(facesContext, jsFiles, jsCommand);
    }
    //if (debugMode)  {
    writer.writeJavascript("TbgTimer.startBody = new Date();");
    //}


    writer.startElement(HtmlConstants.FORM, page);
    writer.writeNameAttribute(
        clientId + SUBCOMPONENT_SEP + "form");
    writer.writeAttribute(HtmlAttributes.ACTION, formAction, true);
    writer.writeIdAttribute(page.getFormId(facesContext));
    writer.writeAttribute(HtmlAttributes.METHOD, getMethod(page), false);
    String enctype = (String) facesContext.getExternalContext().getRequestMap().get(UIPage.ENCTYPE_KEY);
    if (enctype != null) {
      writer.writeAttribute(HtmlAttributes.ENCTYPE, enctype, false); 
    } else {
      writer.writeAttributeFromComponent(HtmlAttributes.ENCTYPE, ATTR_ENCTYPE);
    }
    // TODO: enable configuration of  'accept-charset'
    writer.writeAttribute(HtmlAttributes.ACCEPT_CHARSET, FORM_ACCEPT_CHARSET, false);


    writer.startElement(HtmlConstants.INPUT, null);
    writer.writeAttribute(HtmlAttributes.TYPE, "hidden", false);
    writer.writeNameAttribute(clientId + SUBCOMPONENT_SEP + "form-action");
    writer.writeIdAttribute(clientId + SUBCOMPONENT_SEP + "form-action");
    writer.writeAttribute(HtmlAttributes.VALUE, defaultActionId, true);
    writer.endElement(HtmlConstants.INPUT);


    writer.startElement(HtmlConstants.INPUT, null);
    writer.writeAttribute(HtmlAttributes.TYPE, "hidden", false);
    writer.writeNameAttribute(clientId + SUBCOMPONENT_SEP + "context-path");
    writer.writeIdAttribute(clientId + SUBCOMPONENT_SEP + "context-path");
    writer.writeAttribute(HtmlAttributes.VALUE, facesContext.getExternalContext().getRequestContextPath(), true);
    writer.endElement(HtmlConstants.INPUT);


    writer.startElement(HtmlConstants.INPUT, null);
    writer.writeAttribute(HtmlAttributes.TYPE, "hidden", false);
    writer.writeNameAttribute(clientId + SUBCOMPONENT_SEP + "action-position");
    writer.writeIdAttribute(clientId + SUBCOMPONENT_SEP + "action-position");
    writer.endElement(HtmlConstants.INPUT);


    if (debugMode) {
      writer.startElement(HtmlConstants.INPUT, null);
      writer.writeAttribute(HtmlAttributes.VALUE, clientLogSeverity);
      writer.writeAttribute(HtmlAttributes.ID, clientId + SUBCOMPONENT_SEP + "clientSeverity", false);
      writer.writeAttribute(HtmlAttributes.NAME, clientId + SUBCOMPONENT_SEP + "clientSeverity", false);
      writer.writeAttribute(HtmlAttributes.TYPE, "hidden", false);
      writer.endElement(HtmlConstants.INPUT);
    }


    if (component.getFacet("backButtonDetector") != null) {
      UIComponent hidden = component.getFacet("backButtonDetector");
      RenderUtil.encode(facesContext, hidden);
    }
    String lastFocusId = (String) component.getAttributes().get(LAST_FOCUS_ID);
    if (lastFocusId != null) {
      writer.writeJavascript("Tobago.lastFocusId = '" + lastFocusId + "';");
      component.getAttributes().remove(LAST_FOCUS_ID);
    }
    //checkForCommandFacet(component, facesContext, writer);


// TODO: this is needed for the "BACK-BUTTON-PROBLEM"
// but may no longer needed
/*
    if (ViewHandlerImpl.USE_VIEW_MAP) {
      writer.startElement(HtmlConstants.INPUT, null);
      writer.writeAttribute(HtmlAttributes.TYPE, "hidden", null);
      writer.writeNameAttribute(ViewHandlerImpl.PAGE_ID);
      writer.writeIdAttribute(ViewHandlerImpl.PAGE_ID);
      Object value = facesContext.getViewRoot().getAttributes().get(
          ViewHandlerImpl.PAGE_ID);
      writer.writeAttribute(HtmlAttributes.VALUE, (value != null ? value : ""), null);
      writer.endElement(HtmlConstants.INPUT);
    }
*/


    // write the proviously rendered page content
    writer.write(content.toString());


    // write the previously rendered popups
    writer.write(popups.toString());


    writer.startElement(HtmlConstants.SPAN, null);
    writer.writeIdAttribute(clientId + SUBCOMPONENT_SEP + "jsf-state-container");
    writer.flush();


    // catch the next written stuff into a string and look if it is empty (TOBAGO-909)
    FastStringWriter buffer = new FastStringWriter(40); // usually only the marker...
    TobagoResponseWriter originalWriter = (TobagoResponseWriter) facesContext.getResponseWriter();
    writer = (TobagoResponseWriter) writer.cloneWithWriter(buffer);
    facesContext.setResponseWriter(writer);
    viewHandler.writeState(facesContext);
    final String stateContent = buffer.toString();
    writer = originalWriter;
    facesContext.setResponseWriter(writer);


    if (StringUtils.isBlank(stateContent)) {

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                //But since the introduction of portlet bridge and the 
                //removal of portlet code in myfaces core 2.0, this condition
                //no longer applies
                
                ExternalContext externalContext = facesContext.getExternalContext();
                ViewHandler viewHandler = facesContext.getApplication().getViewHandler();
                String toViewId = navigationCase.getToViewId(facesContext);
                


                String redirectPath = viewHandler.getRedirectURL(
                        facesContext, toViewId, 
                        NavigationUtils.getEvaluatedNavigationParameters(navigationCase.getParameters()) ,
                        navigationCase.isIncludeViewParams());
                
                //Clear ViewMap if we are redirecting to other resource
                UIViewRoot viewRoot = facesContext.getViewRoot(); 
                if (viewRoot != null && !viewRoot.getViewId().equals(toViewId))
                {
                    //call getViewMap(false) to prevent unnecessary map creation
                    Map<String, Object> viewMap = viewRoot.getViewMap(false);
                    if (viewMap != null)
                    {
                        viewMap.clear();
                    }
                }
                
                // JSF 2.0 the javadoc of handleNavigation() says something like this 
                // "...If the view has changed after an application action, call
                // PartialViewContext.setRenderAll(true)...". The effect is that ajax requests
                // are included on navigation.
                PartialViewContext partialViewContext = facesContext.getPartialViewContext();
                String viewId = facesContext.getViewRoot() != null ? facesContext.getViewRoot().getViewId() : null;
                if ( partialViewContext.isPartialRequest() && 
                     !partialViewContext.isRenderAll() && 
                     !toViewId.equals(viewId))
                {
                    partialViewContext.setRenderAll(true);
                }
                
                // JSF 2.0 Spec call Flash.setRedirect(true) to notify Flash scope and take proper actions
                externalContext.getFlash().setRedirect(true);
                try
                {
                    externalContext.redirect(redirectPath);
                    facesContext.responseComplete();
                }
                catch (IOException e)
                {
                    throw new FacesException(e.getMessage(), e);
                }
            }
            else
            {
                ViewHandler viewHandler = facesContext.getApplication().getViewHandler();
                //create new view
                String newViewId = navigationCase.getToViewId(facesContext);
                // JSF 2.0 the javadoc of handleNavigation() says something like this 
                // "...If the view has changed after an application action, call
                // PartialViewContext.setRenderAll(true)...". The effect is that ajax requests
                // are included on navigation.
                PartialViewContext partialViewContext = facesContext.getPartialViewContext();
                String viewId = facesContext.getViewRoot() != null ? facesContext.getViewRoot().getViewId() : null;
                if ( partialViewContext.isPartialRequest() && 
                     !partialViewContext.isRenderAll() && 
                     !newViewId.equals(viewId))
                {
                    partialViewContext.setRenderAll(true);
                }


                if (facesContext.getViewRoot() != null)
                {
                    if (facesContext.getViewRoot().getAttributes().containsKey("oam.CALL_PRE_DISPOSE_VIEW"))
                    {
                        facesContext.getAttributes().put(SKIP_ITERATION_HINT, Boolean.TRUE);
                        facesContext.getViewRoot().visitTree(VisitContext.createVisitContext(facesContext),
                                                             new PreDisposeViewCallback());
                        facesContext.getAttributes().remove(SKIP_ITERATION_HINT);
                    }
                }


                // create UIViewRoot for new view
                UIViewRoot viewRoot = null;
                
                String derivedViewId = viewHandler.deriveViewId(facesContext, newViewId);


                if (derivedViewId != null)
                {
                    ViewDeclarationLanguage vdl = viewHandler.getViewDeclarationLanguage(facesContext, derivedViewId);
                    
                    if (vdl != null)
                    {
                        ViewMetadata metadata = vdl.getViewMetadata(facesContext, newViewId);
                        
                        if (metadata != null)
                        {
                            viewRoot = metadata.createMetadataView(facesContext);
                        }
                    }
                }
                
                // viewRoot can be null here, if ...
                //   - we don't have a ViewDeclarationLanguage (e.g. when using facelets-1.x)
                //   - there is no view metadata or metadata.createMetadataView() returned null
                //   - viewHandler.deriveViewId() returned null
                if (viewRoot == null)
                {
                    viewRoot = viewHandler.createView(facesContext, newViewId);
                }
                
                facesContext.setViewRoot(viewRoot);
                facesContext.renderResponse();
            }

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            throw new FacesException("FacesContext is null");
        }


        // get some required Objects
        Application application = facesContext.getApplication();
        ViewHandler viewHandler = application.getViewHandler();
        UIViewRoot viewRoot = facesContext.getViewRoot();
        RestoreViewSupport restoreViewSupport = getRestoreViewSupport();


        // Examine the FacesContext instance for the current request. If it already contains a UIViewRoot
        if (viewRoot != null)
        {
            if (log.isLoggable(Level.FINEST))
            {
                log.finest("View already exists in the FacesContext");
            }
            
            // Set the locale on this UIViewRoot to the value returned by the getRequestLocale() method on the
            // ExternalContext for this request
            viewRoot.setLocale(facesContext.getExternalContext().getRequestLocale());
            
            restoreViewSupport.processComponentBinding(facesContext, viewRoot);
            
            // invoke the afterPhase MethodExpression of UIViewRoot
            _invokeViewRootAfterPhaseListener(facesContext);
            
            return false;
        }
        
        String viewId = restoreViewSupport.calculateViewId(facesContext);


        // Determine if the current request is an attempt by the 
        // servlet container to display an error page.
        // If the request is an error page request, the servlet container
        // is required to set the request parameter "javax.servlet.error.message".
        final boolean errorPageRequest = facesContext.getExternalContext().getRequestMap()
                                                 .get("javax.servlet.error.message") != null;
        
        // Determine if this request is a postback or an initial request.
        // But if it is an error page request, do not treat it as a postback (since 2.0)
        if (!errorPageRequest && restoreViewSupport.isPostback(facesContext))
        { // If the request is a postback
            if (log.isLoggable(Level.FINEST))
            {
                log.finest("Request is a postback");
            }


            try
            {
                facesContext.setProcessingEvents(false);
                // call ViewHandler.restoreView(), passing the FacesContext instance for the current request and the 
                // view identifier, and returning a UIViewRoot for the restored view.
                viewRoot = viewHandler.restoreView(facesContext, viewId);
                if (viewRoot == null)
                {
                    // If the return from ViewHandler.restoreView() is null, throw a ViewExpiredException with an 
                    // appropriate error message.
                    throw new ViewExpiredException("No saved view state could be found for the view identifier: "
                                                   + viewId, viewId);
                }
                
                // Store the restored UIViewRoot in the FacesContext.
                facesContext.setViewRoot(viewRoot);
            }
            finally
            {
                facesContext.setProcessingEvents(true);
            }
            
            // Restore binding
            // See https://javaserverfaces-spec-public.dev.java.net/issues/show_bug.cgi?id=806
            restoreViewSupport.processComponentBinding(facesContext, viewRoot);
        }
        else
        { // If the request is a non-postback
            if (log.isLoggable(Level.FINEST))
            {
                log.finest("Request is not a postback. New UIViewRoot will be created");
            }
            
            //viewHandler.deriveViewId(facesContext, viewId)
            //restoreViewSupport.deriveViewId(facesContext, viewId)
            ViewDeclarationLanguage vdl = viewHandler.getViewDeclarationLanguage(facesContext, 
                    viewHandler.deriveLogicalViewId(facesContext, viewId));
            
            // viewHandler.deriveLogicalViewId() could trigger an InvalidViewIdException, which
            // it is handled internally sending a 404 error code set the response as complete.
            if (facesContext.getResponseComplete())
            {
                return true;
            }
            
            if (vdl != null)
            {
                ViewMetadata metadata = vdl.getViewMetadata(facesContext, viewId);
                
                Collection<UIViewParameter> viewParameters = null;
                
                if (metadata != null)
                {
                    viewRoot = metadata.createMetadataView(facesContext);
                    
                    if (viewRoot != null)
                    {
                        viewParameters = ViewMetadata.getViewParameters(viewRoot);
                    }
                    else if(facesContext.getResponseComplete())
                    {
                        // this can happen if the current request is a debug request,
                        // in this case no further processing is necessary
                        return true;
                    }
                }
    
                // If viewParameters is not an empty collection DO NOT call renderResponse
                if ( !(viewParameters != null && !viewParameters.isEmpty()) )
                {
                    // Call renderResponse() on the FacesContext.
                    facesContext.renderResponse();
                }
            }
            else
            {
                // Call renderResponse
                facesContext.renderResponse();
            }
            
            // viewRoot can be null here, if ...
            //   - we don't have a ViewDeclarationLanguage (e.g. when using facelets-1.x)
            //   - there is no view metadata or metadata.createMetadataView() returned null
            if (viewRoot == null)
            {
                // call ViewHandler.createView(), passing the FacesContext instance for the current request and 
                // the view identifier
                viewRoot = viewHandler.createView(facesContext, viewId);
            }
            
            // Subscribe the newly created UIViewRoot instance to the AfterAddToParent event, passing the 
            // UIViewRoot instance itself as the listener.
            // -= Leonardo Uribe =- This line it is not necessary because it was

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