481 lines
15 KiB
JavaScript
481 lines
15 KiB
JavaScript
// Underscore.string
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// (c) 2010 Esa-Matti Suuronen <esa-matti aet suuronen dot org>
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// Underscore.strings is freely distributable under the terms of the MIT license.
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// Documentation: https://github.com/epeli/underscore.string
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// Some code is borrowed from MooTools and Alexandru Marasteanu.
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// Version 2.0.0
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(function(root){
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'use strict';
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// Defining helper functions.
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var nativeTrim = String.prototype.trim;
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var parseNumber = function(source) { return source * 1 || 0; };
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var strRepeat = function(i, m) {
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for (var o = []; m > 0; o[--m] = i) {}
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return o.join('');
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};
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var slice = function(a){
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return Array.prototype.slice.call(a);
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};
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var defaultToWhiteSpace = function(characters){
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if (characters) {
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return _s.escapeRegExp(characters);
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}
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return '\\s';
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};
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var sArgs = function(method){
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return function(){
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var args = slice(arguments);
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for(var i=0; i<args.length; i++)
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args[i] = args[i] == null ? '' : '' + args[i];
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return method.apply(null, args);
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};
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};
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// sprintf() for JavaScript 0.7-beta1
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// http://www.diveintojavascript.com/projects/javascript-sprintf
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//
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// Copyright (c) Alexandru Marasteanu <alexaholic [at) gmail (dot] com>
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// All rights reserved.
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var sprintf = (function() {
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function get_type(variable) {
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return Object.prototype.toString.call(variable).slice(8, -1).toLowerCase();
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}
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var str_repeat = strRepeat;
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var str_format = function() {
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if (!str_format.cache.hasOwnProperty(arguments[0])) {
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str_format.cache[arguments[0]] = str_format.parse(arguments[0]);
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}
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return str_format.format.call(null, str_format.cache[arguments[0]], arguments);
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};
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str_format.format = function(parse_tree, argv) {
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var cursor = 1, tree_length = parse_tree.length, node_type = '', arg, output = [], i, k, match, pad, pad_character, pad_length;
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for (i = 0; i < tree_length; i++) {
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node_type = get_type(parse_tree[i]);
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if (node_type === 'string') {
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output.push(parse_tree[i]);
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}
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else if (node_type === 'array') {
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match = parse_tree[i]; // convenience purposes only
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if (match[2]) { // keyword argument
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arg = argv[cursor];
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for (k = 0; k < match[2].length; k++) {
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if (!arg.hasOwnProperty(match[2][k])) {
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throw(sprintf('[_.sprintf] property "%s" does not exist', match[2][k]));
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}
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arg = arg[match[2][k]];
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}
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} else if (match[1]) { // positional argument (explicit)
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arg = argv[match[1]];
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}
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else { // positional argument (implicit)
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arg = argv[cursor++];
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}
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if (/[^s]/.test(match[8]) && (get_type(arg) != 'number')) {
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throw(sprintf('[_.sprintf] expecting number but found %s', get_type(arg)));
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}
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switch (match[8]) {
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case 'b': arg = arg.toString(2); break;
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case 'c': arg = String.fromCharCode(arg); break;
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case 'd': arg = parseInt(arg, 10); break;
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case 'e': arg = match[7] ? arg.toExponential(match[7]) : arg.toExponential(); break;
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case 'f': arg = match[7] ? parseFloat(arg).toFixed(match[7]) : parseFloat(arg); break;
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case 'o': arg = arg.toString(8); break;
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case 's': arg = ((arg = String(arg)) && match[7] ? arg.substring(0, match[7]) : arg); break;
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case 'u': arg = Math.abs(arg); break;
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case 'x': arg = arg.toString(16); break;
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case 'X': arg = arg.toString(16).toUpperCase(); break;
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}
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arg = (/[def]/.test(match[8]) && match[3] && arg >= 0 ? '+'+ arg : arg);
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pad_character = match[4] ? match[4] == '0' ? '0' : match[4].charAt(1) : ' ';
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pad_length = match[6] - String(arg).length;
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pad = match[6] ? str_repeat(pad_character, pad_length) : '';
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output.push(match[5] ? arg + pad : pad + arg);
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}
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}
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return output.join('');
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};
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str_format.cache = {};
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str_format.parse = function(fmt) {
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var _fmt = fmt, match = [], parse_tree = [], arg_names = 0;
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while (_fmt) {
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if ((match = /^[^\x25]+/.exec(_fmt)) !== null) {
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parse_tree.push(match[0]);
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}
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else if ((match = /^\x25{2}/.exec(_fmt)) !== null) {
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parse_tree.push('%');
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}
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else if ((match = /^\x25(?:([1-9]\d*)\$|\(([^\)]+)\))?(\+)?(0|'[^$])?(-)?(\d+)?(?:\.(\d+))?([b-fosuxX])/.exec(_fmt)) !== null) {
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if (match[2]) {
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arg_names |= 1;
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var field_list = [], replacement_field = match[2], field_match = [];
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if ((field_match = /^([a-z_][a-z_\d]*)/i.exec(replacement_field)) !== null) {
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field_list.push(field_match[1]);
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while ((replacement_field = replacement_field.substring(field_match[0].length)) !== '') {
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if ((field_match = /^\.([a-z_][a-z_\d]*)/i.exec(replacement_field)) !== null) {
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field_list.push(field_match[1]);
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}
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else if ((field_match = /^\[(\d+)\]/.exec(replacement_field)) !== null) {
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field_list.push(field_match[1]);
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}
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else {
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throw('[_.sprintf] huh?');
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}
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}
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}
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else {
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throw('[_.sprintf] huh?');
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}
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match[2] = field_list;
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}
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else {
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arg_names |= 2;
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}
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if (arg_names === 3) {
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throw('[_.sprintf] mixing positional and named placeholders is not (yet) supported');
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}
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parse_tree.push(match);
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}
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else {
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throw('[_.sprintf] huh?');
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}
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_fmt = _fmt.substring(match[0].length);
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}
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return parse_tree;
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};
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return str_format;
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})();
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// Defining underscore.string
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var _s = {
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VERSION: '2.0.0',
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isBlank: sArgs(function(str){
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return (/^\s*$/).test(str);
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}),
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stripTags: sArgs(function(str){
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return str.replace(/<\/?[^>]+>/ig, '');
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}),
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capitalize : sArgs(function(str) {
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return str.charAt(0).toUpperCase() + str.substring(1).toLowerCase();
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}),
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chop: sArgs(function(str, step){
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step = parseNumber(step) || str.length;
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var arr = [];
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for (var i = 0; i < str.length;) {
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arr.push(str.slice(i,i + step));
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i = i + step;
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}
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return arr;
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}),
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clean: sArgs(function(str){
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return _s.strip(str.replace(/\s+/g, ' '));
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}),
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count: sArgs(function(str, substr){
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var count = 0, index;
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for (var i=0; i < str.length;) {
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index = str.indexOf(substr, i);
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index >= 0 && count++;
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i = i + (index >= 0 ? index : 0) + substr.length;
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}
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return count;
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}),
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chars: sArgs(function(str) {
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return str.split('');
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}),
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escapeHTML: sArgs(function(str) {
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return str.replace(/&/g,'&').replace(/</g,'<').replace(/>/g,'>')
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.replace(/"/g, '"').replace(/'/g, "'");
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}),
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unescapeHTML: sArgs(function(str) {
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return str.replace(/</g, '<').replace(/>/g, '>')
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.replace(/"/g, '"').replace(/'/g, "'").replace(/&/g, '&');
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}),
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escapeRegExp: sArgs(function(str){
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// From MooTools core 1.2.4
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return str.replace(/([-.*+?^${}()|[\]\/\\])/g, '\\$1');
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}),
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insert: sArgs(function(str, i, substr){
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var arr = str.split('');
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arr.splice(parseNumber(i), 0, substr);
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return arr.join('');
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}),
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include: sArgs(function(str, needle){
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return str.indexOf(needle) !== -1;
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}),
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join: sArgs(function(sep) {
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var args = slice(arguments);
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return args.join(args.shift());
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}),
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lines: sArgs(function(str) {
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return str.split("\n");
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}),
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reverse: sArgs(function(str){
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return Array.prototype.reverse.apply(String(str).split('')).join('');
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}),
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splice: sArgs(function(str, i, howmany, substr){
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var arr = str.split('');
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arr.splice(parseNumber(i), parseNumber(howmany), substr);
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return arr.join('');
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}),
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startsWith: sArgs(function(str, starts){
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return str.length >= starts.length && str.substring(0, starts.length) === starts;
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}),
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endsWith: sArgs(function(str, ends){
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return str.length >= ends.length && str.substring(str.length - ends.length) === ends;
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}),
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succ: sArgs(function(str){
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var arr = str.split('');
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arr.splice(str.length-1, 1, String.fromCharCode(str.charCodeAt(str.length-1) + 1));
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return arr.join('');
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}),
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titleize: sArgs(function(str){
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var arr = str.split(' '),
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word;
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for (var i=0; i < arr.length; i++) {
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word = arr[i].split('');
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if(typeof word[0] !== 'undefined') word[0] = word[0].toUpperCase();
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i+1 === arr.length ? arr[i] = word.join('') : arr[i] = word.join('') + ' ';
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}
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return arr.join('');
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}),
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camelize: sArgs(function(str){
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return _s.trim(str).replace(/(\-|_|\s)+(.)?/g, function(match, separator, chr) {
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return chr ? chr.toUpperCase() : '';
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});
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}),
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underscored: function(str){
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return _s.trim(str).replace(/([a-z\d])([A-Z]+)/g, '$1_$2').replace(/\-|\s+/g, '_').toLowerCase();
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},
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dasherize: function(str){
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return _s.trim(str).replace(/([a-z\d])([A-Z]+)/g, '$1-$2').replace(/^([A-Z]+)/, '-$1').replace(/\_|\s+/g, '-').toLowerCase();
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},
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humanize: function(str){
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return _s.capitalize(this.underscored(str).replace(/_id$/,'').replace(/_/g, ' '));
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},
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trim: sArgs(function(str, characters){
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if (!characters && nativeTrim) {
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return nativeTrim.call(str);
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}
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characters = defaultToWhiteSpace(characters);
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return str.replace(new RegExp('\^[' + characters + ']+|[' + characters + ']+$', 'g'), '');
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}),
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ltrim: sArgs(function(str, characters){
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characters = defaultToWhiteSpace(characters);
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return str.replace(new RegExp('\^[' + characters + ']+', 'g'), '');
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}),
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rtrim: sArgs(function(str, characters){
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characters = defaultToWhiteSpace(characters);
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return str.replace(new RegExp('[' + characters + ']+$', 'g'), '');
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}),
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truncate: sArgs(function(str, length, truncateStr){
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truncateStr = truncateStr || '...';
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length = parseNumber(length);
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return str.length > length ? str.slice(0,length) + truncateStr : str;
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}),
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/**
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* _s.prune: a more elegant version of truncate
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* prune extra chars, never leaving a half-chopped word.
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* @author github.com/sergiokas
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*/
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prune: sArgs(function(str, length, pruneStr){
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// Function to check word/digit chars including non-ASCII encodings.
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var isWordChar = function(c) { return ((c.toUpperCase() != c.toLowerCase()) || /[-_\d]/.test(c)); }
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var template = '';
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var pruned = '';
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var i = 0;
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// Set default values
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pruneStr = pruneStr || '...';
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length = parseNumber(length);
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// Convert to an ASCII string to avoid problems with unicode chars.
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for (i in str) {
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template += (isWordChar(str[i]))?'A':' ';
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}
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// Check if we're in the middle of a word
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if( template.substring(length-1, length+1).search(/^\w\w$/) === 0 )
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pruned = _s.rtrim(template.slice(0,length).replace(/([\W][\w]*)$/,''));
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else
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pruned = _s.rtrim(template.slice(0,length));
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pruned = pruned.replace(/\W+$/,'');
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return (pruned.length+pruneStr.length>str.length) ? str : str.substring(0, pruned.length)+pruneStr;
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}),
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words: function(str, delimiter) {
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return String(str).split(delimiter || " ");
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},
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pad: sArgs(function(str, length, padStr, type) {
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var padding = '',
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padlen = 0;
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length = parseNumber(length);
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if (!padStr) { padStr = ' '; }
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else if (padStr.length > 1) { padStr = padStr.charAt(0); }
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switch(type) {
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case 'right':
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padlen = (length - str.length);
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padding = strRepeat(padStr, padlen);
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str = str+padding;
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break;
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case 'both':
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padlen = (length - str.length);
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padding = {
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'left' : strRepeat(padStr, Math.ceil(padlen/2)),
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'right': strRepeat(padStr, Math.floor(padlen/2))
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};
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str = padding.left+str+padding.right;
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break;
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default: // 'left'
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padlen = (length - str.length);
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padding = strRepeat(padStr, padlen);;
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str = padding+str;
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}
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return str;
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}),
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lpad: function(str, length, padStr) {
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return _s.pad(str, length, padStr);
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},
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rpad: function(str, length, padStr) {
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return _s.pad(str, length, padStr, 'right');
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},
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lrpad: function(str, length, padStr) {
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return _s.pad(str, length, padStr, 'both');
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},
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sprintf: sprintf,
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vsprintf: function(fmt, argv){
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argv.unshift(fmt);
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return sprintf.apply(null, argv);
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},
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toNumber: function(str, decimals) {
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var num = parseNumber(parseNumber(str).toFixed(parseNumber(decimals)));
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return (!(num === 0 && (str !== "0" && str !== 0))) ? num : Number.NaN;
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},
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strRight: sArgs(function(sourceStr, sep){
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var pos = (!sep) ? -1 : sourceStr.indexOf(sep);
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return (pos != -1) ? sourceStr.slice(pos+sep.length, sourceStr.length) : sourceStr;
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}),
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strRightBack: sArgs(function(sourceStr, sep){
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var pos = (!sep) ? -1 : sourceStr.lastIndexOf(sep);
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return (pos != -1) ? sourceStr.slice(pos+sep.length, sourceStr.length) : sourceStr;
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}),
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strLeft: sArgs(function(sourceStr, sep){
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var pos = (!sep) ? -1 : sourceStr.indexOf(sep);
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return (pos != -1) ? sourceStr.slice(0, pos) : sourceStr;
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}),
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strLeftBack: sArgs(function(sourceStr, sep){
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var pos = sourceStr.lastIndexOf(sep);
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return (pos != -1) ? sourceStr.slice(0, pos) : sourceStr;
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}),
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exports: function() {
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var result = {};
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for (var prop in this) {
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if (!this.hasOwnProperty(prop) || prop == 'include' || prop == 'contains' || prop == 'reverse') continue;
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result[prop] = this[prop];
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}
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return result;
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}
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};
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// Aliases
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_s.strip = _s.trim;
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_s.lstrip = _s.ltrim;
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_s.rstrip = _s.rtrim;
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_s.center = _s.lrpad;
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_s.ljust = _s.lpad;
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_s.rjust = _s.rpad;
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_s.contains = _s.include;
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// CommonJS module is defined
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if (typeof exports !== 'undefined') {
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if (typeof module !== 'undefined' && module.exports) {
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// Export module
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module.exports = _s;
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}
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exports._s = _s;
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// Integrate with Underscore.js
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} else if (typeof root._ !== 'undefined') {
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// root._.mixin(_s);
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root._.string = _s;
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root._.str = root._.string;
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// Or define it
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} else {
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root._ = {
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string: _s,
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str: _s
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};
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}
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}(this || window));
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