2 * (C) Copyright 2004-2007 Shawn Betts
3 * (C) Copyright 2007-2009 John J. Foerch
4 * (C) Copyright 2007-2008 Jeremy Maitin-Shepard
6 * Use, modification, and distribution are subject to the terms specified in the
11 * trim_whitespace removes whitespace from the beginning and end of the
14 function trim_whitespace (str) {
15 return (new String(str)).replace(/^\s+|\s+$/g, "");
19 function shell_quote (str) {
20 var s = str.replace("\"", "\\\"", "g");
21 s = s.replace("$", "\$", "g");
25 /* Like perl's quotemeta. Backslash all non-alphanumerics. */
26 function quotemeta (str) {
27 return str.replace(/([^a-zA-Z0-9])/g, "\\$1");
30 /* Given a list of choices (strings), return a regexp which matches any
32 function choice_regexp (choices) {
33 return ("(?:" + choices.map(quotemeta).join("|") + ")");
38 * get_shortdoc_string, given a docstring, returns the portion of the
39 * docstring up to the first newline, or the whole docstring.
41 function get_shortdoc_string (doc) {
44 var idx = doc.indexOf("\n");
46 shortdoc = doc.substring(0,idx);
55 * string_format takes a format-string containing %X style format codes,
56 * and an object mapping the code-letters to replacement text. It
57 * returns a string with the formatting codes replaced by the replacement
60 function string_format (spec, substitutions) {
61 return spec.replace(/%(.)/g, function (a, b) substitutions[b]);
66 * html_escape replaces characters which are special in html with character
67 * entities, safe for inserting as text into an html document.
69 function html_escape (str) {
70 return str.replace(/&/g, '&')
71 .replace(/</g, '<')
72 .replace(/>/g, '>')
73 .replace(/"/g, '"');
78 * get_spaces returns a string of n spaces.
80 function get_spaces (n) {
82 while (x.length < n) x += " ";
88 * word_wrap wraps str to line_length.
90 function word_wrap (str, line_length, line_prefix_first, line_prefix) {
91 if (line_prefix === undefined)
92 line_prefix = line_prefix_first;
93 else if (line_prefix.length < line_prefix_first.length) {
94 line_prefix += get_spaces(line_prefix_first.length - line_prefix.length);
97 line_length -= line_prefix_first.length;
102 let cur_prefix = line_prefix_first;
105 while (line_length < str.length) {
106 let i = str.lastIndexOf(" ", line_length);
108 i = str.indexOf(" ", line_length);
110 out += cur_prefix + str + "\n";
114 out += cur_prefix + str.substr(0, i) + "\n";
115 while (i < str.length && str.charAt(i) == " ")
119 cur_prefix = line_prefix;
122 out += cur_prefix + str + "\n";
128 * or_string joins an array of strings on commas, except for the last
129 * pair, which it joins with the word "or".
131 function or_string (options) {
132 return options.slice(0,options.length-1)
133 .join(", ") + " or " + options[options.length - 1];