106 lines
1.9 KiB
JavaScript
106 lines
1.9 KiB
JavaScript
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/*
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Copyright (c) 2004-2006, The Dojo Foundation
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All Rights Reserved.
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Licensed under the Academic Free License version 2.1 or above OR the
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modified BSD license. For more information on Dojo licensing, see:
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http://dojotoolkit.org/community/licensing.shtml
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*/
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dojo.provide("dojo.string.Builder");
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dojo.require("dojo.string");
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// NOTE: testing shows that direct "+=" concatenation is *much* faster on
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// Spidermoneky and Rhino, while arr.push()/arr.join() style concatenation is
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// significantly quicker on IE (Jscript/wsh/etc.).
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dojo.string.Builder = function(str){
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this.arrConcat = (dojo.render.html.capable && dojo.render.html["ie"]);
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var a = [];
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var b = str || "";
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var length = this.length = b.length;
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if(this.arrConcat){
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if(b.length > 0){
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a.push(b);
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}
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b = "";
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}
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this.toString = this.valueOf = function(){
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return (this.arrConcat) ? a.join("") : b;
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};
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this.append = function(s){
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if(this.arrConcat){
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a.push(s);
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}else{
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b+=s;
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}
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length += s.length;
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this.length = length;
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return this;
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};
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this.clear = function(){
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a = [];
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b = "";
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length = this.length = 0;
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return this;
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};
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this.remove = function(f,l){
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var s = "";
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if(this.arrConcat){
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b = a.join("");
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}
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a=[];
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if(f>0){
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s = b.substring(0, (f-1));
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}
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b = s + b.substring(f + l);
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length = this.length = b.length;
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if(this.arrConcat){
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a.push(b);
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b="";
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}
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return this;
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};
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this.replace = function(o,n){
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if(this.arrConcat){
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b = a.join("");
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}
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a = [];
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b = b.replace(o,n);
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length = this.length = b.length;
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if(this.arrConcat){
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a.push(b);
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b="";
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}
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return this;
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};
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this.insert = function(idx,s){
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if(this.arrConcat){
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b = a.join("");
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}
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a=[];
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if(idx == 0){
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b = s + b;
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}else{
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var t = b.split("");
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t.splice(idx,0,s);
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b = t.join("")
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}
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length = this.length = b.length;
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if(this.arrConcat){
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a.push(b);
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b="";
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}
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return this;
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};
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};
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