/**
 * Copyright (C) 2009 eXo Platform SAS.
 * 
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 * 
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

/*******************************************************************************
 * Portal Ajax Response Data Structure {PortalResponse} | |--->{PortletResponse} |
 * |--->{PortletResponse} | |-->{portletId} | | | |-->{PortletResponseData} | | |
 * |--->{BlockToUpdate} | | |-->{BlockToUpdateId} | | |-->{BlockToUpdateData} | | |
 * |--->{BlockToUpdate} | |--->{PortalResponseData} | | | |--->{BlockToUpdate} | |
 * |-->{BlockToUpdateId} | | |-->{BlockToUpdateData} | | | |--->{BlockToUpdate}
 * |--->{PortalResponseScript}
 * 
 ******************************************************************************/

/*
 * This object is wrapper on the value of each HTML block returned by an eXo
 * Portal AJAX call.
 * 
 * This includes: - the portle ID - the portlet title - the portlet mode - the
 * portlet state - the portlet content - the updated scripts to dynamically load
 * in the browser
 * 
 * Then each block to update within the portlet are place in a object which is
 * itself placed inside an array to provide an OO view of the AJAX response
 */

(function($, base, uiMaskLayer, msg) {
  function PortletResponse(responseDiv) {
    var div = $(responseDiv).children("div");
    this.portletId = div[0].innerHTML;
    this.portletData = div[1].innerHTML;

    this.blocksToUpdate = null;
    var blocks = $(div[1]).children(".BlockToUpdate");

    if (blocks.length > 0) {
      var updates = this.blocksToUpdate = new Array();

      blocks.each(function() {
        var div = $(this).children("div");
        updates[updates.length] = {
          blockId : div[0].innerHTML,
          data : div[1]
        };
        updates[updates.length - 1].scripts = $(div[1]).find("script");
      });
    } else {
      /*
       * If there is no block to update it means we are in a JSR 286 / 168
       * portlet In that case we need to find all the script tags and
       * dynamically execute them.
       * 
       * Indeed, when being in an AJAX call that return some <script> tag, local
       * functions are lost when calling the eval() methods. When the code is
       * written by eXo we use global scoped funstions like "instance.myFunction =
       * function(arguments)".
       * 
       * But when the code is provided by a third party portlet, it is not
       * possible to force that good practise. Hence we have to dynamically
       * reference the embedded script in the head tag
       */

      this.scripts = $(div[1]).find("script");
    }
  }
  ;

  /** ************************************************************************************** */
  /*
   * This object is an OO wrapper on top of the returning HTML included in the
   * PortalResponse tag.
   * 
   * It allows to split in two different arrays the portletResponse blocks and
   * the one and the PortalResponseData one
   * 
   * It also extract from the HTML the javascripts script to then be dynamically
   * evaluated
   */
  function PortalResponse(responseDiv) {
    // jquery always remove script tag from the source
    var temp = document.createElement("div");
    temp.innerHTML = responseDiv;
    var div = $(temp).children().first(), portalResp = this;

    portalResp.portletResponses = new Array();
    // Portlet Response
    div
        .children("div.PortletResponse")
        .each(
            function() {
              portalResp.portletResponses[portalResp.portletResponses.length] = new PortletResponse(
                  this);
            });
    // Portal Response
    div.children("div.PortalResponseData").each(function() {
      portalResp.data = this;
      portalResp.blocksToUpdate = new Array();
      $(this).children(".BlockToUpdate").each(function() {
        var dataBlocks = $(this).children("div");
        var i = portalResp.blocksToUpdate.length;
        portalResp.blocksToUpdate[i] = {
          blockId : dataBlocks[0].innerHTML,
          data : dataBlocks[1]
        };

        /*
         * handle embedded javascripts to dynamically add them to the page head
         * 
         * This is needed when we refresh an entire portal page that contains
         * some standard JSR 168 / 286 portlets with embeded <script> tag
         */
        portalResp.blocksToUpdate[i].scripts = $(dataBlocks[1]).find("script");
      });
    });
    // Extra Markup Header
    div.children("div.MarkupHeadElements").each(function() {
      portalResp.markupHeadElements = new MarkupHeadElements(this);
    });
    // Loading Scripts
    div.children("div.LoadingScripts").each(function() {
      portalResp.loadingScripts = new LoadingScripts(this);
    });
    // Portal Response Script
    div.children("div.PortalResponseScript").each(function() {
      portalResp.script = this.innerHTML;
      $(this).css("display", "none");
    });
  }
  ;

  function MarkupHeadElements(fragment) {
    var jObj = $(fragment);
    this.titles = jObj.find("title");
    this.bases = jObj.find("base");
    this.links = jObj.find("link");
    this.metas = jObj.find("meta");
    this.scripts = jObj.find("script");
    this.styles = jObj.find("style");
    // Recreate tag to make sure browser will execute it
    for (var i = 0; i < this.scripts.length; i++) {
      this.scripts[i] = createScriptNode(this.scripts[i]);
    }
  }

  function LoadingScripts(fragment) {
    this.immediateScripts = [];
    var jFragment = $(fragment);
    var headers = jFragment.children(".ImmediateScripts").first().html();
    headers = headers.replace(/^\s*/, '').split(",");
    for (var i = 0; i < headers.length; i++) {
      if (headers[i] !== "") {
        this.immediateScripts.push(headers[i]);
      }
    }
  }

  /*
   * This function is used to dynamically append a script to the head tag of the
   * page
   */
  function appendScriptToHead(scriptId, scriptElement) {
    var head = $("head");
    head.find("#" + scriptId).remove();
    var script = $(scriptElement);
    script.attr("id", scriptId);
    head[0].appendChild(script[0]);
  }
  ;

  function createScriptNode(elem) {
    var script = document.createElement('script');
    script.type = 'text/javascript';
    script.className = elem.className;
    if (elem.defer) {
      script.defer = elem.defer;
    }

    // check if contains source attribute
    if (elem.src) {
      script.src = elem.src;
    } else {
      script.text = elem.innerHTML;
    }

    return script;
  }
  ;

  /** ************************************************************************************** */
  /*
   * This is the main object that acts both as a field wrapper and a some status
   * method wrapper
   * 
   * It is also the object that has the reference to the XHR request thanks to a
   * reference to the eXo.core.Browser object
   */
  function AjaxRequest(method, url, queryString) {
    var instance = new Object();

    instance.request = null;

    instance.timeout = 80000;
    instance.aborted = false;

    if (method != null)
      instance.method = method;
    else
      instance.method = "GET";
    if (url != null)
      instance.url = url;
    else
      instance.url = window.location.href;
    if (queryString != null)
      instance.queryString = queryString;
    else
      instance.queryString = null;

    instance.responseReceived = false;

    instance.status = null;
    instance.statusText = null;

    instance.responseText = null;
    instance.responseXML = null;

    instance.onTimeout = null;
    instance.onLoading = null;
    instance.onComplete = null;
    instance.onSuccess = null;
    instance.callBack = null;

    instance.onError = null;

    instance.isAsynchronize = function() {
      var isASync = false;
      var name = "ajax_async";
      name = name.replace(/[\[]/, "\\\[").replace(/[\]]/, "\\\]");
      var regexS = "[\\?&]" + name + "=([^&#]*)";
      var regex = new RegExp(regexS);
      var results = regex.exec(instance.url);
      if (results != null) {
        isASync = (results[1] == "true") ? true : false;
      }
      return isASync;
    };

    instance.onLoadingInternalHandled = false;
    instance.onCompleteInternalHandled = false;

    /*
     * This method is executed only if the boolean "onLoadingInternalHandled" is
     * set to false The method delegate the call to the ajaxLoading() method of
     * the HttpResponseHandler
     */
    instance.onLoadingInternal = function() {
      if (instance.onLoadingInternalHandled)
        return;

      if (typeof (instance.onLoading) == "function")
        instance.onLoading(instance);
      instance.onLoadingInternalHandled = true;
    };

    /**
     * evaluate the response and return an object
     */
    instance.evalResponse = function() {
      try {
        return eval((instance.responseText || ''));
      } catch (e) {
        throw (new Error('Cannot eval the response'));
      }
    };

    /*
     * This method is executed only if the boolean "onCompleteInternalHandled"
     * is set to false The method delegate the call to the ajaxResponse() method
     * of the HttpResponseHandler after calling the onSuccess() method of the
     * current object
     * 
     * During the processof this method, all the instance fields are filled with
     * the content coming back from the AJAX call. Once the ajaxResponse() is
     * called then the callback object is called if not null
     */
    instance.onCompleteInternal = function(xhr, statusText) {
      if (instance.onCompleteInternalHandled || instance.aborted)
        return;

      if (statusText == "timeout") {
        instance.onTimeoutInternal();
      } else {
        try {
          instance.responseReceived = true;
          instance.status = xhr.status;
          instance.statusText = statusText;
          instance.responseText = xhr.responseText;
          instance.responseXML = xhr.responseXML;
        } catch (err) {
          instance.status = 0;
        }

        if (typeof (instance.onComplete) == "function")
          instance.onComplete(instance);

        if (statusText == "success"
            && typeof (instance.onSuccess) == "function") {
          instance.onSuccess(instance);
          instance.onCompleteInternalHandled = true;
          if (typeof (instance.callBack) == "function") {
            instance.callBack(instance);
          } else if (instance.callBack) { // Modified by Uoc Nguyen: allow user
                                          // use custom javascript code for
                                          // callback
            try {
              eval(instance.callBack);
            } catch (e) {
              throw (new Error('Can not execute callback...'));
            }
          }
        } else if (typeof (instance.onError) == "function") {
          instance.onError(instance);
          instance.onCompleteInternalHandled = false;
        }
      }
    };

    /*
     * This method is executed only if the boolean "onLoadingInternalHandled" is
     * set to false The method delegate the call to the ajaxTimeout() method of
     * the HttpResponseHandler
     */
    instance.onTimeoutInternal = function() {
      if (instance == null || instance.request == null
          || instance.onCompleteInternalHandled)
        return;
      instance.aborted = true;

      if (typeof (instance.onTimeout) == "function")
        instance.onTimeout(instance);
    };

    /*
     * This method is directly called from the doRequest() method. It opens a
     * connection to the server, set up the handlers and sends the query to it.
     * Status methods are then called on the request object during the entire
     * lifecycle of the call
     * 
     * It also sets up the time out and its call back to the method of the
     * current instance onTimeoutInternal()
     */
    instance.process = function() {
      var contentType;
      if (instance.method == "POST") {
        contentType = "application/x-www-form-urlencoded; charset=UTF-8";
      } else {
        contentType = "text/plain;charset=UTF-8";
      }

      instance.request = $.ajax(instance.url, {
        type : instance.method,
        beforeSend : instance.onLoadingInternal,
        complete : instance.onCompleteInternal,
        contentType : contentType,
        data : instance.queryString,
        timeout : instance.timeout,
        cache : false
      });
    };

    return instance;
  }
  ;

  /** ************************************************************************************** */
  /*
   * This object is also a wrapper object on top of several methods: -
   * executeScript - updateBlocks - ajaxTimeout - ajaxResponse - ajaxLoading
   * 
   * Those methods are executed during the process of the AJAX call
   */
  function HttpResponseHandler() {
    var instance = new Object();
    /*
     * instance.to stores a timeout object used to postpone the display of the
     * loading popup the timeout is defined later in the instance.ajaxLoading
     * function
     */
    instance.to = null;
    /*
     * This internal method is used to dynamically load JS scripts in the
     * browser by using the eval() method;
     */
    instance.executeScript = function(script) {
      if (script == null || script == "")
        return;
      try {
        eval($("<div />").html(script).text());
        return;
      } catch (err) {
        console.error(err.message);
      }
      var elements = script.split(';');
      if (elements != null && elements.length > 0) {
        for (var i = 0; i < elements.length; i++) {
          try {
            eval(elements[i]);
          } catch (err) {
            alert(err + " : " + elements[i] + "  -- " + i);
          }
        }
      }
    };

    instance.updateHtmlHead = function(response, callback) {
      if (!response)
        return;
      cleanHtmlHead(response);
      var head = $("head");
      var markupHeadElements = response.markupHeadElements;
      if (!markupHeadElements)
        return;

      if (markupHeadElements.titles && markupHeadElements.titles.length != 0) {
        var oldTitle = head.children("title");
        var newTitle = markupHeadElements.titles[markupHeadElements.titles.length - 1];
        if (oldTitle.length) {
          oldTitle.replaceWith(newTitle);
        } else {
          head[0].appendChild(newTitle);
        }
      }

      appendElementsToHead(head, markupHeadElements.metas);
      appendElementsToHead(head, markupHeadElements.bases);
      appendElementsToHead(head, markupHeadElements.links);
      appendElementsToHead(head, markupHeadElements.styles);

      var that = this;
      var appendScript = function() {
        if (!markupHeadElements.scripts.length) {
          callback.apply(that);
        } else {
          var tmp = markupHeadElements.scripts.splice(0, 1);
          appendElementsToHead(head, $(tmp));
          if (!tmp[0].src) {
            appendScript.apply(that);
          }
        }
      };

      for (var i = 0; i < markupHeadElements.scripts.length; i++) {
        var script = markupHeadElements.scripts[i];

        if (script.src) {
          if (script.onreadystatechange !== undefined) {
            script.onreadystatechange = (function(sci) {
              return function() {
                if (!sci.readyState || /loaded|complete/.test(sci.readyState)) {
                  sci.onreadystatechange = null;
                  appendScript.apply(that);
                }
              };
            })(script);
          } else {
            script.onload = (function(sci) {
              return function() {
                sci.onload = null;
                appendScript.apply(that);
              };
            })(script);
          }
          script.onerror = (function(sci) {
            return function() {
              sci.onerror = null;
              appendScript.apply(that);
            };
          })(script);
        }
      }
      appendScript.apply(that);
    };

    function cleanHtmlHead(response) {
      var head = $("head");
      if (response) {
        var portletResponses = response.portletResponses;
        if (portletResponses) {
          for (var i = 0; i < portletResponses.length; i++) {
            head.find(
                ".ExHead-" + portletResponses[i].portletId + ":not(title)")
                .remove();
          }
        }

        if (response.data) {
          $(response.data).find(".PORTLET-FRAGMENT").each(
              function() {
                head.find(
                    ".ExHead-" + this.parentNode.id.replace("EditMode-", "")
                        + ":not(title)").remove();
              });
        }
      } else {
        // This code will be run after we've finished update html
        var portlets = $("body .PORTLET-FRAGMENT");
        var exHeads = head.find("[class^='ExHead-']:not(title)");
        exHeads.each(function() {
          var portletId = this.className.substring(7);
          var del = true;
          portlets.each(function() {
            if (this.parentNode.id.replace("EditMode-", "") === portletId) {
              del = false;
            }
          });
          if (del) {
            $(this).remove();
          }
        });
      }
    }

    function appendElementsToHead(head, elements) {
      if (!elements)
        return;
      elements.each(function() {
        head[0].appendChild(this);
      });
    }

    /*
     * This methods will replace some block content by new one. This is the
     * important concept in any AJAX call where JS is used to dynamically
     * refresh a part of the page.
     * 
     * The first argument is an array of blocks to update while the second
     * argument is the id of the html component that is the parent of the block
     * to update
     * 
     * Each block in the array contains the exact id to update, hence a loop is
     * executed for each block and the HTML is then dynamically replaced by the
     * new one
     */
    instance.updateBlocks = function(blocksToUpdate, parentId) {
      if (!blocksToUpdate)
        return;
      var parentBlock = null;
      if (parentId && parentId != "") {
        parentBlock = $("#" + parentId);

        // Workaround: In the case of the Portlet is being rendered/displayed in
        // Edit Layout mode
        if (parentBlock.length == 0) {
          parentBlock = $("#UIPortlet-" + parentId);
        }
      }
      parentBlock = !parentBlock ? $(document) : parentBlock;

      $.each(blocksToUpdate, function() {
        var blockToUpdate = this;
        var target = parentBlock.find("#" + blockToUpdate.blockId);
        if (target.length == 0)
          alert(msg.getMessage("TargetBlockNotFound", new Array(
              blockToUpdate.blockId)));
        var newData = $(blockToUpdate.data).find("#" + blockToUpdate.blockId);
        if (newData.length == 0)
          alert(msg.getMessage("BlockUpdateNotFound", new Array(
              blockToUpdate.blockId)));
        // target.parentNode.replaceChild(newData, target);
        target.html(newData.html());
        // update embedded scripts
        if (blockToUpdate.scripts) {
          for (var k = 0; k < blockToUpdate.scripts.length; k++) {
            var encodedName = 'script_' + k + '_' + blockToUpdate.blockId;
            appendScriptToHead(encodedName, blockToUpdate.scripts[k]);
          }
        }
      });
    };

    /*
     * This method is called when the AJAX call was too long to be executed
     */
    instance.ajaxTimeout = function(request) {
      uiMaskLayer.removeMasks(eXo.portal.AjaxRequest.maskLayer);
      eXo.portal.AjaxRequest.maskLayer = null;
      eXo.portal.CurrentRequest = null;
      window.location.reload();
    };

    /*
     * This method is called when the AJAX call is completed and that the
     * request.responseText has been filled with the returning HTML. Hence the
     * goal of this method is to update the diffent blocks dynamically.
     * 
     * 1) Create a temporary div element and set the response HTML text to its
     * innerHTML variable of the temp object 2) Use the
     * DOMUtil.findFirstDescendantByClass() method to get the div with the Id
     * "PortalResponse" out of the returned HTML 3) Create the PortalResponse
     * object by passing the previous DOM element as an argumen, it will provide
     * an OO view of the PortletResponse and other portal response blocks to
     * update 4) Each portlet response block is the updated using the naming
     * convention "UIPortlet-" + portletId; and then the script are loaded 5)
     * Then it is each portal block which is updated and the assocaited scripts
     * are evaluated
     */
    instance.ajaxResponse = function(request, response) {
      var that = this;
      if (!response) {
        var response = new PortalResponse(that.responseText);
      }

      var loadingScripts = response.loadingScripts;
      var immediateScripts = loadingScripts ? loadingScripts.immediateScripts
          : [];
      if (immediateScripts.length) {
        window.require(immediateScripts, function() {
          immediateScripts.length = 0;
          instance.ajaxResponse.apply(that, [ request, response ]);
        });
        return;
      }

      if (response.markupHeadElements) {
        instance.updateHtmlHead(response, function() {
          response.markupHeadElements = null;
          instance.ajaxResponse.apply(that, [ request, response ]);
        });
        return;
      }

      // Handle the portlet responses
      var portletResponses = response.portletResponses;
      if (portletResponses) {
        $.each(portletResponses,
            function() {
              var portletResponse = this;
              if (!portletResponse.blocksToUpdate) {
                /*
                 * This means that the entire portlet fragment is included in
                 * the portletResponse.portletData and that it does not contain
                 * any finer block to update. Hence replace the innerHTML inside
                 * the id="PORTLET-FRAGMENT" block
                 */
                var parentBlock = $("#" + portletResponse.portletId);
                var target = $(
                    "#" + portletResponse.portletId + " .PORTLET-FRAGMENT")
                    .first();
                target.html(portletResponse.portletData);

                // update embedded scripts
                if (portletResponse.scripts) {
                  portletResponse.scripts.each(function(index) {
                    var encodedName = 'script_' + index + '_'
                        + portletResponse.portletId;
                    appendScriptToHead(encodedName, this);
                  });
                }
              } else {
                /*
                 * Else updates each block with the portlet
                 */
                instance.updateBlocks(portletResponse.blocksToUpdate,
                    portletResponse.portletId);
              }
            });
      }
      if (!response.blocksToUpdate && request.responseText !== "") {
        if (confirm(msg.getMessage("SessionTimeout")))
          instance.ajaxTimeout(request);
      }
      try {
        // Handle the portal responses
        instance.updateBlocks(response.blocksToUpdate);
        // After handle html response. We need to remove extra markup header of
        // removed portlets
        cleanHtmlHead();
        instance.executeScript(response.script);
        /**
         * Clears the instance.to timeout if the request takes less time than
         * expected to get response Removes the transparent mask so the UI is
         * available again, with cursor "auto"
         */
        clearTimeout(instance.to);
        uiMaskLayer.removeMasks(eXo.portal.AjaxRequest.maskLayer);

        eXo.portal.AjaxRequest.maskLayer = null;
        eXo.portal.CurrentRequest = null;
      } catch (error) {
        alert(error.message);
      }
      
      //Remove modal-open class that was added by UIPopupWindow.js
      //This is a workaround for responsive feature branch
      //When a popup window is opened, it add modal-open class to html body
      if (!$('.uiPopupWrapper').length) {
        $('body').removeClass('modal-open');
      }
    };

    /*
     * This method is called when doing an AJAX call, it will put the "Loading"
     * image in the middle of the page for the entire call of the request
     */
    instance.ajaxLoading = function(request) {
      if (request.isAsynchronize())
        return;
      /**
       * Waits 2 seconds (2000 ms) to display the loading popup if the response
       * comes before this timeout, the loading popup won't appear at all
       * Displays a transparent mask with the "wait" cursor to tell the user
       * something is processing
       * 
       * Modified by Truong LE to avoid double click problem
       */

      if (eXo.portal.AjaxRequest.maskLayer == null) {
        eXo.portal.AjaxRequest.maskLayer = uiMaskLayer.createTransparentMask();
      }
      instance.to = setTimeout(function() {
        if (eXo.portal.AjaxRequest.maskLayer != null) {
          uiMaskLayer.showAjaxLoading(eXo.portal.AjaxRequest.maskLayer);
        }
      }, 2000);
    };

    return instance;
  }

  /*
   * The doRequest() method takes incoming request from GET and POST calls The
   * second argument is the URL to target on the server The third argument is
   * the query string object which is created out of a form element, this value
   * is not null only when there is a POST request.
   * 
   * 1) An AjaxRequest object is instanciated, it holds the reference to the XHR
   * method 2) An HttpResponseHandler object is instantiated and its methods
   * like ajaxResponse, ajaxLoading, ajaxTimeout are associated with the one
   * from the AjaxRequest and will be called by the XHR during the process
   * method
   */
  window.doRequest = function(method, url, queryString, callback) {
    request = new AjaxRequest(method, url, queryString);
    handler = new HttpResponseHandler();
    request.onSuccess = handler.ajaxResponse;
    request.onLoading = handler.ajaxLoading;
    request.onTimeout = handler.ajaxTimeout;
    request.callBack = callback;
    eXo.portal.CurrentRequest = request;
    request.process();
    eXo.session.startItv();
  }

  /**
   * Abort an ajax request
   * 
   * @return
   */
  window.ajaxAbort = function() {
    uiMaskLayer.removeMasks(eXo.portal.AjaxRequest.maskLayer);
    eXo.portal.AjaxRequest.maskLayer = null;

    eXo.portal.CurrentRequest.request.abort();
    eXo.portal.CurrentRequest.aborted = true;
    eXo.portal.CurrentRequest = null;
  }

  /**
   * Create an ajax GET request
   * 
   * @param {String}
   *          url - Url
   * @param {boolean}
   *          async - asynchronous or none
   * @return {String} response text if request is not async
   */
  window.ajaxAsyncGetRequest = function(url, async) {
    return ajaxRequest("GET", url, async);
  }

  /**
   * Create an ajax request
   * 
   * @param {String}
   *          method - GET, POST, etc
   * @param {String}
   *          url - Url
   * @param {boolean}
   *          async - asynchronous or none
   * @return {String} response text if request is not async
   */
  window.ajaxRequest = function(method, url, async, queryString) {
    if (async == undefined)
      async = true;
    var resp;
    $.ajax(url, {
      type : method,
      async : async,
      data : queryString,
      headers : {
        "Cache-Control" : "max-age=86400"
      },
      complete : function(jqXHR) {
        resp = jqXHR.responseText;
      }
    });
    eXo.session.startItv();
    if (!async)
      return resp;
  }

  /**
   * Redirect browser to url
   * 
   * @param url
   * @return
   */
  window.ajaxRedirect = function(url) {
    url = url.replace(/&amp;/g, "&");
    window.location.href = url;
  }

  eXo.portal.AjaxRequest = AjaxRequest.prototype.constructor;
})($, base, uiMaskLayer, msg);
