/edgeSNS/edgeSNSProto/war/js/thirdparty/AjaxPages.js

/**

 * Ajax Pages v0.5

 *

 * This software is licensed under the MIT License. 

 *

 * The MIT License

 * 

 * Copyright (c) 2005 Gustavo Ribeiro Amigo

 * 

 * Permission is hereby granted, free of charge, to any person obtaining a copy of 

 * this software and associated documentation files (the "Software"), to deal in 

 * the Software without restriction, including without limitation the rights to use, 

 * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of 

 * the Software, and to permit persons to whom the Software is furnished to do so, 

 * subject to the following conditions:

 * 

 * The above copyright notice and this permission notice shall be included in all 

 * copies or substantial portions of the Software.

 * 

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, 

 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A 

 * PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT 

 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF 

 * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE 

 * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

 */



/**  

 * Class responsable for processing Ajax Pages.

 * @constructor

 * @author Gustavo Amigo

 */

var AjaxPages = function() {};



/**

 * Loads an Ajax Pages template from a file

 * @param url The file to be loaded

 * @returns The template loaded

 */

AjaxPages.prototype.load = function ( url ) {

        var req;

        // branch for native XMLHttpRequest object

        if (window.XMLHttpRequest) {

            req = new XMLHttpRequest();

            req.open("GET", url, false);

            req.send(null);

        // branch for IE/Windows ActiveX version

        } else if (window.ActiveXObject) {

            req = new ActiveXObject("Microsoft.XMLHTTP");

            if (req) {

                req.open("GET", url, false);

                req.send();

            }

        }

        

        this.template = req.responseText;

        return req.responseText;

}



/** 

 * Parses the template

 * @param value (Optional) The template code

 * @returns The javascript code generated from the parsing

 */

AjaxPages.prototype.parse = function( value ) {

    if ( value == undefined ) {

        value = this.template;

    } 

    var out = "";

    var lineNumber = 1;

    try {

    

        var betweenPerc = false;

        

        out = "function(context) { \n";

        

        out += "var __ajp = new AjaxPages();\n";

        out += "var __include;\n";

        

        out += "try {\n"

        

        out += "   if ( context == undefined ) { \n";

        out += "       context = '';\n";

        out += "   }\n";

        

        out += "var out= unescape('";

        

        var line = "";

        

        for (i = 0; i < value.length; i++ )

        {

            var nextTwo = "";

            if ( i <= value.length - 2 ) {

                nextTwo = value.charAt(i) + value.charAt( i + 1 );

            }

            

            var nextThree = "";

            if ( i <= value.length - 3 ) {

                nextThree = value.charAt(i) + value.charAt( i + 1 ) + value.charAt( i + 2 );

            }

            

            if ( nextTwo == "<%" && nextThree != "<%=" && nextThree != "<%@") {

                

                out += "');\n";

                betweenPerc = true;

                i += 1;

                

            } else if ( nextTwo == "<%" && nextThree == "<%=" && nextThree != "<%@") {

                

                out += escape(line) + "');\n";

                line = "";

                out += "    out+= ";

                

                betweenPerc = true;

                i += 2;

            } else if ( nextTwo == "<%" && nextThree != "<%=" && nextThree == "<%@" ) {

                

                i += 3;

                var directive = "";

                

                while ( nextTwo != "%>" ) {

                    directive += value.charAt(i); 

                    i++;

                        if ( i <= value.length - 2 ) {

                            nextTwo = value.charAt(i) + value.charAt( i + 1 );

                        }

                        

                }



                out += escape(line) + "');\n";

                line = "";

                



                out += this._processDirective( directive );

                out += "    out+= unescape('";

                i++;

            } else if ( nextTwo == "%>" ) {

                out += ";\n" + "    out+= unescape('";

                // TODO Throw error if it is off, wrong sintax

                betweenPerc = false;

                i += 1;

            } else if ( value.charAt(i) == String.fromCharCode(10) )  { 

                if ( !betweenPerc ) {

                    out += escape(line) + "\\n');\n" + "    out+= unescape('";

                    line = "";

                    lineNumber ++;

                }               

                

            } else if ( value.charAt(i) == String.fromCharCode(13) )  {                 

            } else {  

                if ( betweenPerc ) {

                    out += value.charAt(i) ;

                } else {

                    line += value.charAt(i); 

                }   

            }

        }

        

        out += escape(line) + "');\n";

        

        out += "} catch (e) {"

        out += "return '"+"An exception occurred while excuting template. Error type: ' + e.name" 

               + "+ '. Error message: ' + e.message;";

        out += "}"

        out += "    return out;\n";

        out += "}\n";

   } catch (e) {

        

        out = "function(context) { \n";

        out += "return '"+"An exception occurred while parsing on line "+ lineNumber +". Error type: " + e.name 

               + ". Error message: " + e.message+"';";

        out += "}"     

   }

   

    return out;

}    











/** 

 * Private method. Should not be used externally.

 * @private

 */

AjaxPages.prototype._processDirective = function(directive) {

    var i = 0;

    

    var tolkenIndex = 0;

    var tolken = new Array();

    

    //Skip first spaces;    

    while ( directive.charAt(i) == ' ' ) {

        i++;

    }

    

    tolken[tolkenIndex] = "";

    while ( directive.charAt(i) != ' ' && i <= directive.length ) {

        tolken[tolkenIndex] += directive.charAt(i);

        i++;

    }

    

    tolkenIndex++;



    //Skip first spaces;    

    while ( directive.charAt(i) == ' ' ) {

        i++;

    }

    

    tolken[tolkenIndex] = "";

    while ( directive.charAt(i) != ' ' && directive.charAt(i) != '=' && i <= directive.length ) {

        tolken[tolkenIndex] += directive.charAt(i);

        i++;

    }

    

    tolkenIndex++;

    

    //Skip first spaces;    

    while ( directive.charAt(i) == ' ' ) {

        i++;

    }

    

    if( directive.charAt(i) != '=' ) 

        throw new AjaxPagesException("Sintax error", "Tolken = expected attribute");

    i++

    

    //Skip first spaces;    

    while ( directive.charAt(i) == ' ' ) {

        i++;

    }

    

    tolken[tolkenIndex] = "";

    while ( directive.charAt(i) != ' ' && i <= directive.length ) {

        tolken[tolkenIndex] += directive.charAt(i);

        i++;

    }   

    tolkenIndex++;

    

    //Skip first spaces;    

    while ( directive.charAt(i) == ' ' &&  i <= directive.length ) {

        i++;

    }

    

    tolken[tolkenIndex] = "";

    while ( directive.charAt(i) != ' ' && directive.charAt(i) != '=' && i <= directive.length && i <= directive.length ) {

        tolken[tolkenIndex] += directive.charAt(i);

        i++;

    }   

    

    tolkenIndex++;

    

    if( directive.charAt(i) != '='  && i <= directive.length  ) 

        throw  new AjaxPagesException("Sintax error", "Tolken = expected after attribute" );

    i++ 

    

    tolken[tolkenIndex] = "";

    while ( directive.charAt(i) != ' ' && i <= directive.length  && i <= directive.length ) {

        tolken[tolkenIndex] += directive.charAt(i);

        i++;

    }   



    var file = "";

    var context = "";



    if ( tolken[0] != "include" )  

        throw new AjaxPagesException("Sintax error","Directive " + tolken[0] + " unknown.") ;

        

    if ( tolken[1] != "file" )      

        throw new AjaxPagesException("Sintax error", "Attribute file expected after include." ); 

    else file = tolken[2];



        

    if ( tolken[3] != "context" && tolken[3] != "" )    

        throw new AjaxPagesException( "Sintax error", "Attribute context expected after file."); 

    else if ( tolken[3] == "context" ) 

        context = tolken[4]

    else 

        context = "context";

        

    var out  = "    __ajp.load("+ file +");\n";

        out += "    __include = __ajp.getProcessor();\n";

        out += "    out+= __include(" + context + ");\n";

        

    return out;    

        

}



/** 

 * Processes the template

 * @param value (Optional) The template code.

 * @returns The output from processing the template

 */    

AjaxPages.prototype.process = function( value ) {

    eval ( "var processor =" + this.parse( value ) );

    return processor();

}  



/** 

 * Get the function that processes the template

 * @param value (Optional) The template code      

 * @returns The function that process the template

 */

AjaxPages.prototype.getProcessor = function( value ) {

    eval ( "var processor =" + this.parse( value ) );

    return processor;

}        



/** 

 * Exception throwed by AjaxPages

 */

AjaxPagesException = function( name, message ) {

    this.name = name;

    this.message = message;

}