164 lines
4.7 KiB
JavaScript
164 lines
4.7 KiB
JavaScript
//>>built
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define("dojo/string", ["./_base/kernel", "./_base/lang"], function(dojo, lang) {
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// module:
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// dojo/string
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// summary:
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// TODOC
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lang.getObject("string", true, dojo);
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/*=====
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dojo.string = {
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// summary: String utilities for Dojo
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};
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=====*/
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dojo.string.rep = function(/*String*/str, /*Integer*/num){
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// summary:
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// Efficiently replicate a string `n` times.
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// str:
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// the string to replicate
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// num:
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// number of times to replicate the string
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if(num <= 0 || !str){ return ""; }
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var buf = [];
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for(;;){
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if(num & 1){
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buf.push(str);
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}
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if(!(num >>= 1)){ break; }
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str += str;
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}
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return buf.join(""); // String
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};
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dojo.string.pad = function(/*String*/text, /*Integer*/size, /*String?*/ch, /*Boolean?*/end){
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// summary:
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// Pad a string to guarantee that it is at least `size` length by
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// filling with the character `ch` at either the start or end of the
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// string. Pads at the start, by default.
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// text:
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// the string to pad
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// size:
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// length to provide padding
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// ch:
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// character to pad, defaults to '0'
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// end:
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// adds padding at the end if true, otherwise pads at start
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// example:
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// | // Fill the string to length 10 with "+" characters on the right. Yields "Dojo++++++".
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// | dojo.string.pad("Dojo", 10, "+", true);
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if(!ch){
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ch = '0';
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}
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var out = String(text),
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pad = dojo.string.rep(ch, Math.ceil((size - out.length) / ch.length));
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return end ? out + pad : pad + out; // String
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};
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dojo.string.substitute = function( /*String*/ template,
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/*Object|Array*/map,
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/*Function?*/ transform,
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/*Object?*/ thisObject){
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// summary:
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// Performs parameterized substitutions on a string. Throws an
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// exception if any parameter is unmatched.
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// template:
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// a string with expressions in the form `${key}` to be replaced or
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// `${key:format}` which specifies a format function. keys are case-sensitive.
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// map:
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// hash to search for substitutions
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// transform:
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// a function to process all parameters before substitution takes
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// place, e.g. mylib.encodeXML
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// thisObject:
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// where to look for optional format function; default to the global
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// namespace
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// example:
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// Substitutes two expressions in a string from an Array or Object
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// | // returns "File 'foo.html' is not found in directory '/temp'."
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// | // by providing substitution data in an Array
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// | dojo.string.substitute(
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// | "File '${0}' is not found in directory '${1}'.",
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// | ["foo.html","/temp"]
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// | );
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// |
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// | // also returns "File 'foo.html' is not found in directory '/temp'."
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// | // but provides substitution data in an Object structure. Dotted
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// | // notation may be used to traverse the structure.
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// | dojo.string.substitute(
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// | "File '${name}' is not found in directory '${info.dir}'.",
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// | { name: "foo.html", info: { dir: "/temp" } }
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// | );
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// example:
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// Use a transform function to modify the values:
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// | // returns "file 'foo.html' is not found in directory '/temp'."
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// | dojo.string.substitute(
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// | "${0} is not found in ${1}.",
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// | ["foo.html","/temp"],
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// | function(str){
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// | // try to figure out the type
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// | var prefix = (str.charAt(0) == "/") ? "directory": "file";
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// | return prefix + " '" + str + "'";
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// | }
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// | );
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// example:
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// Use a formatter
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// | // returns "thinger -- howdy"
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// | dojo.string.substitute(
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// | "${0:postfix}", ["thinger"], null, {
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// | postfix: function(value, key){
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// | return value + " -- howdy";
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// | }
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// | }
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// | );
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thisObject = thisObject || dojo.global;
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transform = transform ?
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lang.hitch(thisObject, transform) : function(v){ return v; };
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return template.replace(/\$\{([^\s\:\}]+)(?:\:([^\s\:\}]+))?\}/g,
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function(match, key, format){
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var value = lang.getObject(key, false, map);
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if(format){
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value = lang.getObject(format, false, thisObject).call(thisObject, value, key);
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}
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return transform(value, key).toString();
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}); // String
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};
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/*=====
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dojo.string.trim = function(str){
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// summary:
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// Trims whitespace from both sides of the string
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// str: String
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// String to be trimmed
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// returns: String
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// Returns the trimmed string
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// description:
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// This version of trim() was taken from [Steven Levithan's blog](http://blog.stevenlevithan.com/archives/faster-trim-javascript).
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// The short yet performant version of this function is dojo.trim(),
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// which is part of Dojo base. Uses String.prototype.trim instead, if available.
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return ""; // String
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}
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=====*/
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dojo.string.trim = String.prototype.trim ?
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lang.trim : // aliasing to the native function
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function(str){
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str = str.replace(/^\s+/, '');
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for(var i = str.length - 1; i >= 0; i--){
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if(/\S/.test(str.charAt(i))){
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str = str.substring(0, i + 1);
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break;
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}
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}
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return str;
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};
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return dojo.string;
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});
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