// (c) Copyright Microsoft Corporation.
// This source is subject to the Microsoft Permissive License.
// See http://www.microsoft.com/resources/sharedsource/licensingbasics/sharedsourcelicenses.mspx.
// All other rights reserved.


Type.registerNamespace('ITkey.Web');

// This is the base behavior for all extender behaviors
ITkey.Web.BehaviorBase = function(element) {
    /// <summary>
    /// Base behavior for all extender behaviors
    /// </summary>
    /// <param name="element" type="Sys.UI.DomElement" domElement="true">
    /// Element the behavior is associated with
    /// </param>
    ITkey.Web.BehaviorBase.initializeBase(this,[element]);
    
    this._clientStateFieldID = null;
    this._pageRequestManager = null;
    this._partialUpdateBeginRequestHandler = null;
    this._partialUpdateEndRequestHandler = null;
}
ITkey.Web.BehaviorBase.prototype = {
    initialize : function() {
        /// <summary>
        /// Initialize the behavior
        /// </summary>

        // TODO: Evaluate necessity
        ITkey.Web.BehaviorBase.callBaseMethod(this, 'initialize');
    },

    dispose : function() {
        /// <summary>
        /// Dispose the behavior
        /// </summary>
        
        //get a reference to the element before it is disposed
        var elt = this.get_element();
        
        ITkey.Web.BehaviorBase.callBaseMethod(this, 'dispose');
        
        //Memory leak - the _behaviors array must be removed from the element if it is empty,
        //otherwise the element will leak memory.
        if (elt && elt._behaviors && elt._behaviors.length == 0)
        {
            elt._behaviors = null;
        }
        elt = null;

        if (this._pageRequestManager) {
            if (this._partialUpdateBeginRequestHandler) {
                this._pageRequestManager.remove_beginRequest(this._partialUpdateBeginRequestHandler);
                this._partialUpdateBeginRequestHandler = null;
            }
            if (this._partialUpdateEndRequestHandler) {
                this._pageRequestManager.remove_endRequest(this._partialUpdateEndRequestHandler);
                this._partialUpdateEndRequestHandler = null;
            }
            this._pageRequestManager = null;
        }
    },

    get_ClientStateFieldID : function() {
        /// <value type="String">
        /// ID of the hidden field used to store client state
        /// </value>
        return this._clientStateFieldID;
    },
    set_ClientStateFieldID : function(value) {
        if (this._clientStateFieldID != value) {
            this._clientStateFieldID = value;
            this.raisePropertyChanged('ClientStateFieldID');
        }
    },

    get_ClientState : function() {
        /// <value type="String">
        /// Client state
        /// </value>
        if (this._clientStateFieldID) {
            var input = document.getElementById(this._clientStateFieldID);
            if (input) {
                return input.value;
            }
        }
        return null;
    },
    set_ClientState : function(value) {
        if (this._clientStateFieldID) {
            var input = document.getElementById(this._clientStateFieldID);
            if (input) {
                input.value = value;
            }
        }
    },

    registerPartialUpdateEvents : function() {
        /// <summary>
        /// Register for beginRequest and endRequest events on the PageRequestManager,
        /// (which cause _partialUpdateBeginRequest and _partialUpdateEndRequest to be
        /// called when an UpdatePanel refreshes)
        /// </summary>

        if (Sys && Sys.WebForms && Sys.WebForms.PageRequestManager){
            this._pageRequestManager = Sys.WebForms.PageRequestManager.getInstance();
            if (this._pageRequestManager) {
                this._partialUpdateBeginRequestHandler = Function.createDelegate(this, this._partialUpdateBeginRequest);
                this._pageRequestManager.add_beginRequest(this._partialUpdateBeginRequestHandler);
                this._partialUpdateEndRequestHandler = Function.createDelegate(this, this._partialUpdateEndRequest);
                this._pageRequestManager.add_endRequest(this._partialUpdateEndRequestHandler);
            }
        }
    },

    _partialUpdateBeginRequest : function(sender, beginRequestEventArgs) {
        /// <summary>
        /// Method that will be called when a partial update (via an UpdatePanel) begins,
        /// if registerPartialUpdateEvents() has been called.
        /// </summary>
        /// <param name="sender" type="Object">
        /// Sender
        /// </param>
        /// <param name="beginRequestEventArgs" type="Sys.WebForms.BeginRequestEventArgs">
        /// Event arguments
        /// </param>

        // Nothing done here; override this method in a child class
    },
    
    _partialUpdateEndRequest : function(sender, endRequestEventArgs) {
        /// <summary>
        /// Method that will be called when a partial update (via an UpdatePanel) finishes,
        /// if registerPartialUpdateEvents() has been called.
        /// </summary>
        /// <param name="sender" type="Object">
        /// Sender
        /// </param>
        /// <param name="endRequestEventArgs" type="Sys.WebForms.EndRequestEventArgs">
        /// Event arguments
        /// </param>

        // Nothing done here; override this method in a child class
    }
}
ITkey.Web.BehaviorBase.registerClass('ITkey.Web.BehaviorBase', Sys.UI.Behavior);

if(typeof(Sys)!=='undefined')Sys.Application.notifyScriptLoaded();