
/*

  SmartClient Ajax RIA system
  Version v9.0p_2021-05-01/LGPL Deployment (2021-05-01)

  Copyright 2000 and beyond Isomorphic Software, Inc. All rights reserved.
  "SmartClient" is a trademark of Isomorphic Software, Inc.

  LICENSE NOTICE
     INSTALLATION OR USE OF THIS SOFTWARE INDICATES YOUR ACCEPTANCE OF
     ISOMORPHIC SOFTWARE LICENSE TERMS. If you have received this file
     without an accompanying Isomorphic Software license file, please
     contact licensing@isomorphic.com for details. Unauthorized copying and
     use of this software is a violation of international copyright law.

  DEVELOPMENT ONLY - DO NOT DEPLOY
     This software is provided for evaluation, training, and development
     purposes only. It may include supplementary components that are not
     licensed for deployment. The separate DEPLOY package for this release
     contains SmartClient components that are licensed for deployment.

  PROPRIETARY & PROTECTED MATERIAL
     This software contains proprietary materials that are protected by
     contract and intellectual property law. You are expressly prohibited
     from attempting to reverse engineer this software or modify this
     software for human readability.

  CONTACT ISOMORPHIC
     For more information regarding license rights and restrictions, or to
     report possible license violations, please contact Isomorphic Software
     by email (licensing@isomorphic.com) or web (www.isomorphic.com).

*/
//>	@class	StringBuffer
//
//		Use instances of this class to concatenate strings rather than using the normal "this"+"that" methodology.
//		For large sets of strings, this can be up to an order of mangintude faster!
//
//		You can use this class in two ways:
//			1) if you have a static and fairly small set of things to concatenate, call statically
//					alert(StringBuffer.concat("this"," ","that ","and the other"))
//				yields:		"This that and the other"
//
//			2) if you have a loop or more complex logic, create s StringBuffer instance and append to that,
//				then do a buffer.toString() on the results (or do something like an alert() or document.write()
//				that does a toString() for you:
//				
//                  <pre>
//					var buffer = StringBuffer.newInstance();
//					for (var i = 0; i < 10; i++) {
//						buffer.append(i, " ");
//					}
//					alert(buffer)
//				yields:	"0 1 2 3 4 5 6 7 8 9 "
//              </pre>
//<
isc.ClassFactory.defineClass("StringBuffer");
// nickname
isc.SB = isc.StringBuffer;

isc.StringBuffer.addClassProperties({
    // For efficiency we re-use StringBuffers (created lazily when needed).
    _bufferPool:[],
    // upper limit on the number of outstanding buffers to be re-used
    _maxPoolSize:50
});


isc.StringBuffer.addProperties({
    
	maxStreamLength : (isc.Browser.isIE6 ? 1000 : 100000),

    // Don't add props passed in to the SB on create - not supported and this is slightly
    // more efficient
    addPropertiesOnCreate:false
    
});
isc.StringBuffer.addMethods({

    
//>	@method		stringBuffer.init()	(A)
// Initialize the string buffer
//		@group	concat
//
//		@param	[a,b,c]	(object)	properties for the buffer instance
//<
init: function () {
	// create the stream array
	this._stream = [];
},

//>	@method		stringBuffer.append()
// Append all arguments to the string buffer as strings
//		@group	concat
//
//		@param	[arguments]	(string)	strings to append to the buffer
//<
append : function (arg1,A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z) {
    
    
    // Set up local variable to use - this is a very small amount quicker than always referencing
    // this._stream directly
    var theStream = this._stream,  // by reference - manipulating this manipulates this._stream
        strings,
        undef;
   
    // If we are passed an array, it's quickest to manually add it slot by slot
   	if (arg1 != null && arg1.constructor.__nativeType == 2) {

        

        var length = arg1.length;
        if (length <= 30) {       
            var length = theStream.length;
            for (var i = 0; i < arg1.length; i++) {
                theStream[length++] = arg1[i];
            }
        } else {        
            theStream[theStream.length] = arg1.join(isc.emptyString)
        }


    // If we are not passed an array it's quickest to iterate through the arguments and add them
    // to this._stream.
    // We don't have arguments.join(), and adding it is too expensive
    } else {
        if (Z === undef && Y === undef && X === undef) {

            
            if (arg1 != null) theStream[theStream.length] = arg1;
            if (A != null) theStream[theStream.length] = A
            if (B != null) theStream[theStream.length] = B
            if (C != null) theStream[theStream.length] = C
            if (D != null) theStream[theStream.length] = D
            if (E != null) theStream[theStream.length] = E
            if (F != null) theStream[theStream.length] = F
            if (G != null) theStream[theStream.length] = G
            if (H != null) theStream[theStream.length] = H
            if (I != null) theStream[theStream.length] = I
            if (J != null) theStream[theStream.length] = J
            if (K != null) theStream[theStream.length] = K
            if (L != null) theStream[theStream.length] = L
            if (M != null) theStream[theStream.length] = M
            if (N != null) theStream[theStream.length] = N
            if (O != null) theStream[theStream.length] = O
            if (P != null) theStream[theStream.length] = P
            if (Q != null) theStream[theStream.length] = Q
            if (R != null) theStream[theStream.length] = R
            if (S != null) theStream[theStream.length] = S
            if (T != null) theStream[theStream.length] = T
            if (U != null) theStream[theStream.length] = U
            if (V != null) theStream[theStream.length] = V
            if (W != null) theStream[theStream.length] = W 

        // If we were passed more than 27 args, look at the arguments object
        
        } else {
            strings = arguments;
            for (var i = 0, l = strings.length; i < l; i++) {
                theStream[theStream.length] = strings[i]
            }
        }
    }
    
	// if we're holding on to too many string instances, collapse them into one instance
    // This is because IE slows down in general when a lot of large objects are sitting in
    // memory
    if (theStream.length > this.maxStreamLength) {
        theStream[0] = theStream.join(isc.emptyString); 
        //isc.Log.logWarn("collapsing stream: " + theStream[0].substring(0, 80));
        theStream.length = 1;
    }
    return this;
},


appendNumber : function (number, length) {
    var stream = this._stream;
    if (length == null) {
        length = 5;
        var numberCopy = number;
        if (numberCopy < 0) {
            numberCopy = 0 - numberCopy;
            // add one for the "-" char
            length += 1;
        }
        // If it will take up more than 5 slots, determine how many it needs
        if (numberCopy >= 100000) {
            numberCopy = numberCopy / 100000;
            while (numberCopy >= 1) {
                length += 1;
                numberCopy = numberCopy / 10;
            }
        }
    }
    isc._fillNumber(stream, number, stream.length, length);
},

clear : function () {
    this._stream.length = 0;
},


// Can be called when a stringBuffer is no longer required - gets added to the pool to be reused
// Also returns the buffer's contents
release : function (noReturnValue) {
    
    var SB = isc.SB, pool = SB._bufferPool,
        string = noReturnValue ? null : this.toString();
    if (pool.length < SB._maxPoolSize) {

        // Clear it out and put it into the pool 
        this.clear();
        pool[pool.length] = this;
    }
    if (!noReturnValue) return string;
},


getArray : function () {
    return this._stream;
}

});

//>	@method		stringBuffer.toString()
//		@group	concat
// 			Return all of the appended strings as a single string.
// 			Added manually here since doing it with addMethods doesn't work because toString is not
// 			enumerable.
//
//		@return	(string)	a single concatenated string
//<
isc.StringBuffer.getPrototype().toString = function () {
    //if (isc.Browser.isMoz) isc.SB._checkArray(this._stream);
	return this._stream.join(isc.emptyString);
}

isc.StringBuffer._joinFunc = Array.prototype.join;
isc.StringBuffer.addClassMethods({

// Override create() - if we've already created a stringBuffer that's no longer being
// used, reuse it.
create : function () {
    var pool = this._bufferPool,
        poolLength = pool.length;
    if (poolLength > 0) {
        var buffer = pool[poolLength -1];
        pool.length = poolLength -1;
        return buffer;
    } else {
        // standard creation.
        return isc.Class.create.apply(this);
    }
},    



//>	@method		StringBuffer.concat()
//		@group	concat
// 			Static method that will return a string composed of the arguments passed in
//
//		@return	(string)	a single concatenated string
//<
_joinBuffer : [],
concat : function (A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z,
                   a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z) 
{
    
    
    var undef,
        returnString;
    if (isc.Browser.isIE && x === undef && y === undef && z === undef) {
        var buffer = this._joinBuffer;
        buffer.length = 0;

        
        if (A != null) buffer[buffer.length] = A;
        if (B != null) buffer[buffer.length] = B;
        if (C != null) buffer[buffer.length] = C;
        if (D != null) buffer[buffer.length] = D;
        if (E != null) buffer[buffer.length] = E;        
        if (F != null) buffer[buffer.length] = F;
        if (G != null) buffer[buffer.length] = G;
        if (H != null) buffer[buffer.length] = H;
        if (I != null) buffer[buffer.length] = I;
        if (J != null) buffer[buffer.length] = J;
        if (K != null) buffer[buffer.length] = K;  
        if (L != null) buffer[buffer.length] = L;
        if (M != null) buffer[buffer.length] = M;        
        if (N != null) buffer[buffer.length] = N;
        if (O != null) buffer[buffer.length] = O;
        if (P != null) buffer[buffer.length] = P;
        if (Q != null) buffer[buffer.length] = Q;
        if (R != null) buffer[buffer.length] = R;
        if (S != null) buffer[buffer.length] = S;
        if (T != null) buffer[buffer.length] = T;
        if (U != null) buffer[buffer.length] = U;
        if (V != null) buffer[buffer.length] = V;
        if (W != null) buffer[buffer.length] = W;
        if (X != null) buffer[buffer.length] = X;
        if (Y != null) buffer[buffer.length] = Y;
        if (Z != null) buffer[buffer.length] = Z;
        if (a != null) buffer[buffer.length] = a;
        if (b != null) buffer[buffer.length] = b;
        if (c != null) buffer[buffer.length] = c;
        if (d != null) buffer[buffer.length] = d;
        if (e != null) buffer[buffer.length] = e;
        if (f != null) buffer[buffer.length] = f;
        if (g != null) buffer[buffer.length] = g;
        if (h != null) buffer[buffer.length] = h;
        if (i != null) buffer[buffer.length] = i;
        if (j != null) buffer[buffer.length] = j;
        if (k != null) buffer[buffer.length] = k;
        if (l != null) buffer[buffer.length] = l;
        if (m != null) buffer[buffer.length] = m;
        if (n != null) buffer[buffer.length] = n;
        if (o != null) buffer[buffer.length] = o;
        if (p != null) buffer[buffer.length] = p;
        if (q != null) buffer[buffer.length] = q;
        if (r != null) buffer[buffer.length] = r;
        if (s != null) buffer[buffer.length] = s;
        if (t != null) buffer[buffer.length] = t;
        if (u != null) buffer[buffer.length] = u;
        if (v != null) buffer[buffer.length] = v;
        if (w != null) buffer[buffer.length] = w;
        if (x != null) buffer[buffer.length] = x;
        if (y != null) buffer[buffer.length] = y;
        if (z != null) buffer[buffer.length] = z;
        
        returnString = buffer.join(isc.emptyString);
    } else {   
	    arguments.join = this._joinFunc;
        returnString = arguments.join(isc.emptyString);
    }
    
    return returnString;
}

});

