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1 // Copyright (C) 2006 Google Inc.
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2 //
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3 // Licensed under the Apache License, Version 2.0 (the "License");
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4 // you may not use this file except in compliance with the License.
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5 // You may obtain a copy of the License at
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6 //
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7 // http://www.apache.org/licenses/LICENSE-2.0
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8 //
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9 // Unless required by applicable law or agreed to in writing, software
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10 // distributed under the License is distributed on an "AS IS" BASIS,
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11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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12 // See the License for the specific language governing permissions and
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13 // limitations under the License.
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14
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15
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16 /**
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17 * @fileoverview
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18 * some functions for browser-side pretty printing of code contained in html.
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19 *
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20 * <p>
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21 * For a fairly comprehensive set of languages see the
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22 * <a href="http://google-code-prettify.googlecode.com/svn/trunk/README.html#langs">README</a>
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23 * file that came with this source. At a minimum, the lexer should work on a
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24 * number of languages including C and friends, Java, Python, Bash, SQL, HTML,
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25 * XML, CSS, Javascript, and Makefiles. It works passably on Ruby, PHP and Awk
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26 * and a subset of Perl, but, because of commenting conventions, doesn't work on
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27 * Smalltalk, Lisp-like, or CAML-like languages without an explicit lang class.
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28 * <p>
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29 * Usage: <ol>
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30 * <li> include this source file in an html page via
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31 * {@code <script type="text/javascript" src="/path/to/prettify.js"></script>}
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32 * <li> define style rules. See the example page for examples.
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33 * <li> mark the {@code <pre>} and {@code <code>} tags in your source with
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34 * {@code class=prettyprint.}
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35 * You can also use the (html deprecated) {@code <xmp>} tag, but the pretty
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36 * printer needs to do more substantial DOM manipulations to support that, so
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37 * some css styles may not be preserved.
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38 * </ol>
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39 * That's it. I wanted to keep the API as simple as possible, so there's no
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40 * need to specify which language the code is in, but if you wish, you can add
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41 * another class to the {@code <pre>} or {@code <code>} element to specify the
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42 * language, as in {@code <pre class="prettyprint lang-java">}. Any class that
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43 * starts with "lang-" followed by a file extension, specifies the file type.
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44 * See the "lang-*.js" files in this directory for code that implements
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45 * per-language file handlers.
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46 * <p>
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47 * Change log:<br>
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48 * cbeust, 2006/08/22
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49 * <blockquote>
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50 * Java annotations (start with "@") are now captured as literals ("lit")
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51 * </blockquote>
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52 * @requires console
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53 */
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54
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55 // JSLint declarations
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56 /*global console, document, navigator, setTimeout, window */
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57
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58 /**
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59 * Split {@code prettyPrint} into multiple timeouts so as not to interfere with
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60 * UI events.
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61 * If set to {@code false}, {@code prettyPrint()} is synchronous.
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62 */
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63 window['PR_SHOULD_USE_CONTINUATION'] = true;
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64
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65 /** the number of characters between tab columns */
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66 window['PR_TAB_WIDTH'] = 8;
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67
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68 /** Contains functions for creating and registering new language handlers.
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69 * @type {Object}
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70 */
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71 window['PR']
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72
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73 /** Pretty print a chunk of code.
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74 *
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75 * @param {string} sourceCodeHtml code as html
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76 * @return {string} code as html, but prettier
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77 */
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78 = window['prettyPrintOne']
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79 /** Find all the {@code <pre>} and {@code <code>} tags in the DOM with
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80 * {@code class=prettyprint} and prettify them.
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81 * @param {Function?} opt_whenDone if specified, called when the last entry
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82 * has been finished.
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83 */
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84 = window['prettyPrint'] = void 0;
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85
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86
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87 (function () {
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88 // Keyword lists for various languages.
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89 var FLOW_CONTROL_KEYWORDS =
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90 "break continue do else for if return while ";
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91 var C_KEYWORDS = FLOW_CONTROL_KEYWORDS + "auto case char const default " +
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92 "double enum extern float goto int long register short signed sizeof " +
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93 "static struct switch typedef union unsigned void volatile ";
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94 var COMMON_KEYWORDS = C_KEYWORDS + "catch class delete false import " +
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95 "new operator private protected public this throw true try typeof ";
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96 var CPP_KEYWORDS = COMMON_KEYWORDS + "alignof align_union asm axiom bool " +
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97 "concept concept_map const_cast constexpr decltype " +
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98 "dynamic_cast explicit export friend inline late_check " +
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99 "mutable namespace nullptr reinterpret_cast static_assert static_cast " +
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100 "template typeid typename using virtual wchar_t where ";
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101 var JAVA_KEYWORDS = COMMON_KEYWORDS +
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102 "abstract boolean byte extends final finally implements import " +
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103 "instanceof null native package strictfp super synchronized throws " +
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104 "transient ";
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105 var CSHARP_KEYWORDS = JAVA_KEYWORDS +
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106 "as base by checked decimal delegate descending dynamic event " +
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107 "fixed foreach from group implicit in interface internal into is lock " +
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108 "object out override orderby params partial readonly ref sbyte sealed " +
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109 "stackalloc string select uint ulong unchecked unsafe ushort var ";
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110 var COFFEE_KEYWORDS = "all and by catch class else extends false finally " +
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111 "for if in is isnt loop new no not null of off on or return super then " +
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112 "true try unless until when while yes ";
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113 var JSCRIPT_KEYWORDS = COMMON_KEYWORDS +
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114 "debugger eval export function get null set undefined var with " +
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115 "Infinity NaN ";
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116 var PERL_KEYWORDS = "caller delete die do dump elsif eval exit foreach for " +
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117 "goto if import last local my next no our print package redo require " +
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118 "sub undef unless until use wantarray while BEGIN END ";
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119 var PYTHON_KEYWORDS = FLOW_CONTROL_KEYWORDS + "and as assert class def del " +
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120 "elif except exec finally from global import in is lambda " +
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121 "nonlocal not or pass print raise try with yield " +
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122 "False True None ";
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123 var RUBY_KEYWORDS = FLOW_CONTROL_KEYWORDS + "alias and begin case class def" +
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124 " defined elsif end ensure false in module next nil not or redo rescue " +
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125 "retry self super then true undef unless until when yield BEGIN END ";
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126 var SH_KEYWORDS = FLOW_CONTROL_KEYWORDS + "case done elif esac eval fi " +
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127 "function in local set then until ";
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128 var ALL_KEYWORDS = (
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129 CPP_KEYWORDS + CSHARP_KEYWORDS + JSCRIPT_KEYWORDS + PERL_KEYWORDS +
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130 PYTHON_KEYWORDS + RUBY_KEYWORDS + SH_KEYWORDS);
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131
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132 // token style names. correspond to css classes
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133 /** token style for a string literal */
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134 var PR_STRING = 'str';
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135 /** token style for a keyword */
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136 var PR_KEYWORD = 'kwd';
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137 /** token style for a comment */
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138 var PR_COMMENT = 'com';
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139 /** token style for a type */
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140 var PR_TYPE = 'typ';
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141 /** token style for a literal value. e.g. 1, null, true. */
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142 var PR_LITERAL = 'lit';
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143 /** token style for a punctuation string. */
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144 var PR_PUNCTUATION = 'pun';
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145 /** token style for a punctuation string. */
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146 var PR_PLAIN = 'pln';
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147
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148 /** token style for an sgml tag. */
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149 var PR_TAG = 'tag';
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150 /** token style for a markup declaration such as a DOCTYPE. */
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151 var PR_DECLARATION = 'dec';
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152 /** token style for embedded source. */
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153 var PR_SOURCE = 'src';
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154 /** token style for an sgml attribute name. */
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155 var PR_ATTRIB_NAME = 'atn';
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156 /** token style for an sgml attribute value. */
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157 var PR_ATTRIB_VALUE = 'atv';
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158
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159 /**
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160 * A class that indicates a section of markup that is not code, e.g. to allow
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161 * embedding of line numbers within code listings.
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162 */
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163 var PR_NOCODE = 'nocode';
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164
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165 /** A set of tokens that can precede a regular expression literal in
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166 * javascript.
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167 * http://www.mozilla.org/js/language/js20/rationale/syntax.html has the full
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168 * list, but I've removed ones that might be problematic when seen in
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169 * languages that don't support regular expression literals.
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170 *
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171 * <p>Specifically, I've removed any keywords that can't precede a regexp
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172 * literal in a syntactically legal javascript program, and I've removed the
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173 * "in" keyword since it's not a keyword in many languages, and might be used
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174 * as a count of inches.
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175 *
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176 * <p>The link a above does not accurately describe EcmaScript rules since
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177 * it fails to distinguish between (a=++/b/i) and (a++/b/i) but it works
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178 * very well in practice.
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179 *
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180 * @private
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181 */
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182 var REGEXP_PRECEDER_PATTERN = function () {
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183 var preceders = [
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184 "!", "!=", "!==", "#", "%", "%=", "&", "&&", "&&=",
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185 "&=", "(", "*", "*=", /* "+", */ "+=", ",", /* "-", */ "-=",
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186 "->", /*".", "..", "...", handled below */ "/", "/=", ":", "::", ";",
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187 "<", "<<", "<<=", "<=", "=", "==", "===", ">",
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188 ">=", ">>", ">>=", ">>>", ">>>=", "?", "@", "[",
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189 "^", "^=", "^^", "^^=", "{", "|", "|=", "||",
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190 "||=", "~" /* handles =~ and !~ */,
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191 "break", "case", "continue", "delete",
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192 "do", "else", "finally", "instanceof",
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193 "return", "throw", "try", "typeof"
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194 ];
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195 var pattern = '(?:^^|[+-]';
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196 for (var i = 0; i < preceders.length; ++i) {
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197 pattern += '|' + preceders[i].replace(/([^=<>:&a-z])/g, '\\$1');
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198 }
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199 pattern += ')\\s*'; // matches at end, and matches empty string
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200 return pattern;
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201 // CAVEAT: this does not properly handle the case where a regular
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202 // expression immediately follows another since a regular expression may
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203 // have flags for case-sensitivity and the like. Having regexp tokens
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204 // adjacent is not valid in any language I'm aware of, so I'm punting.
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205 // TODO: maybe style special characters inside a regexp as punctuation.
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206 }();
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207
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208
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209 /**
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210 * Given a group of {@link RegExp}s, returns a {@code RegExp} that globally
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211 * matches the union of the sets of strings matched by the input RegExp.
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212 * Since it matches globally, if the input strings have a start-of-input
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213 * anchor (/^.../), it is ignored for the purposes of unioning.
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214 * @param {Array.<RegExp>} regexs non multiline, non-global regexs.
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215 * @return {RegExp} a global regex.
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216 */
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217 function combinePrefixPatterns(regexs) {
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218 var capturedGroupIndex = 0;
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219
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220 var needToFoldCase = false;
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221 var ignoreCase = false;
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222 for (var i = 0, n = regexs.length; i < n; ++i) {
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223 var regex = regexs[i];
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224 if (regex.ignoreCase) {
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225 ignoreCase = true;
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226 } else if (/[a-z]/i.test(regex.source.replace(
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227 /\\u[0-9a-f]{4}|\\x[0-9a-f]{2}|\\[^ux]/gi, ''))) {
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228 needToFoldCase = true;
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229 ignoreCase = false;
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230 break;
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231 }
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232 }
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233
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234 function decodeEscape(charsetPart) {
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235 if (charsetPart.charAt(0) !== '\\') { return charsetPart.charCodeAt(0); }
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236 switch (charsetPart.charAt(1)) {
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237 case 'b': return 8;
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238 case 't': return 9;
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239 case 'n': return 0xa;
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240 case 'v': return 0xb;
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241 case 'f': return 0xc;
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242 case 'r': return 0xd;
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243 case 'u': case 'x':
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244 return parseInt(charsetPart.substring(2), 16)
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245 || charsetPart.charCodeAt(1);
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246 case '0': case '1': case '2': case '3': case '4':
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247 case '5': case '6': case '7':
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248 return parseInt(charsetPart.substring(1), 8);
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249 default: return charsetPart.charCodeAt(1);
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250 }
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251 }
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252
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253 function encodeEscape(charCode) {
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254 if (charCode < 0x20) {
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255 return (charCode < 0x10 ? '\\x0' : '\\x') + charCode.toString(16);
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256 }
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257 var ch = String.fromCharCode(charCode);
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258 if (ch === '\\' || ch === '-' || ch === '[' || ch === ']') {
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259 ch = '\\' + ch;
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260 }
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261 return ch;
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262 }
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263
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264 function caseFoldCharset(charSet) {
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265 var charsetParts = charSet.substring(1, charSet.length - 1).match(
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266 new RegExp(
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267 '\\\\u[0-9A-Fa-f]{4}'
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268 + '|\\\\x[0-9A-Fa-f]{2}'
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269 + '|\\\\[0-3][0-7]{0,2}'
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270 + '|\\\\[0-7]{1,2}'
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271 + '|\\\\[\\s\\S]'
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272 + '|-'
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273 + '|[^-\\\\]',
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274 'g'));
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275 var groups = [];
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276 var ranges = [];
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277 var inverse = charsetParts[0] === '^';
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278 for (var i = inverse ? 1 : 0, n = charsetParts.length; i < n; ++i) {
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279 var p = charsetParts[i];
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280 switch (p) {
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281 case '\\B': case '\\b':
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282 case '\\D': case '\\d':
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283 case '\\S': case '\\s':
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284 case '\\W': case '\\w':
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285 groups.push(p);
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286 continue;
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287 }
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288 var start = decodeEscape(p);
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289 var end;
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290 if (i + 2 < n && '-' === charsetParts[i + 1]) {
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291 end = decodeEscape(charsetParts[i + 2]);
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292 i += 2;
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293 } else {
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294 end = start;
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295 }
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296 ranges.push([start, end]);
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297 // If the range might intersect letters, then expand it.
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298 if (!(end < 65 || start > 122)) {
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299 if (!(end < 65 || start > 90)) {
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300 ranges.push([Math.max(65, start) | 32, Math.min(end, 90) | 32]);
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301 }
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302 if (!(end < 97 || start > 122)) {
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303 ranges.push([Math.max(97, start) & ~32, Math.min(end, 122) & ~32]);
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304 }
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305 }
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306 }
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307
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308 // [[1, 10], [3, 4], [8, 12], [14, 14], [16, 16], [17, 17]]
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309 // -> [[1, 12], [14, 14], [16, 17]]
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310 ranges.sort(function (a, b) { return (a[0] - b[0]) || (b[1] - a[1]); });
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311 var consolidatedRanges = [];
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312 var lastRange = [NaN, NaN];
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313 for (var i = 0; i < ranges.length; ++i) {
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314 var range = ranges[i];
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315 if (range[0] <= lastRange[1] + 1) {
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316 lastRange[1] = Math.max(lastRange[1], range[1]);
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317 } else {
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318 consolidatedRanges.push(lastRange = range);
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319 }
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320 }
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321
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322 var out = ['['];
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323 if (inverse) { out.push('^'); }
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324 out.push.apply(out, groups);
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325 for (var i = 0; i < consolidatedRanges.length; ++i) {
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326 var range = consolidatedRanges[i];
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327 out.push(encodeEscape(range[0]));
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328 if (range[1] > range[0]) {
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329 if (range[1] + 1 > range[0]) { out.push('-'); }
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330 out.push(encodeEscape(range[1]));
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331 }
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332 }
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333 out.push(']');
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334 return out.join('');
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335 }
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336
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337 function allowAnywhereFoldCaseAndRenumberGroups(regex) {
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338 // Split into character sets, escape sequences, punctuation strings
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339 // like ('(', '(?:', ')', '^'), and runs of characters that do not
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340 // include any of the above.
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341 var parts = regex.source.match(
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342 new RegExp(
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343 '(?:'
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344 + '\\[(?:[^\\x5C\\x5D]|\\\\[\\s\\S])*\\]' // a character set
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345 + '|\\\\u[A-Fa-f0-9]{4}' // a unicode escape
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346 + '|\\\\x[A-Fa-f0-9]{2}' // a hex escape
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347 + '|\\\\[0-9]+' // a back-reference or octal escape
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348 + '|\\\\[^ux0-9]' // other escape sequence
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349 + '|\\(\\?[:!=]' // start of a non-capturing group
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350 + '|[\\(\\)\\^]' // start/emd of a group, or line start
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351 + '|[^\\x5B\\x5C\\(\\)\\^]+' // run of other characters
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352 + ')',
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353 'g'));
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354 var n = parts.length;
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355
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356 // Maps captured group numbers to the number they will occupy in
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357 // the output or to -1 if that has not been determined, or to
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358 // undefined if they need not be capturing in the output.
|
|
|
359 var capturedGroups = [];
|
|
|
360
|
|
|
361 // Walk over and identify back references to build the capturedGroups
|
|
|
362 // mapping.
|
|
|
363 for (var i = 0, groupIndex = 0; i < n; ++i) {
|
|
|
364 var p = parts[i];
|
|
|
365 if (p === '(') {
|
|
|
366 // groups are 1-indexed, so max group index is count of '('
|
|
|
367 ++groupIndex;
|
|
|
368 } else if ('\\' === p.charAt(0)) {
|
|
|
369 var decimalValue = +p.substring(1);
|
|
|
370 if (decimalValue && decimalValue <= groupIndex) {
|
|
|
371 capturedGroups[decimalValue] = -1;
|
|
|
372 }
|
|
|
373 }
|
|
|
374 }
|
|
|
375
|
|
|
376 // Renumber groups and reduce capturing groups to non-capturing groups
|
|
|
377 // where possible.
|
|
|
378 for (var i = 1; i < capturedGroups.length; ++i) {
|
|
|
379 if (-1 === capturedGroups[i]) {
|
|
|
380 capturedGroups[i] = ++capturedGroupIndex;
|
|
|
381 }
|
|
|
382 }
|
|
|
383 for (var i = 0, groupIndex = 0; i < n; ++i) {
|
|
|
384 var p = parts[i];
|
|
|
385 if (p === '(') {
|
|
|
386 ++groupIndex;
|
|
|
387 if (capturedGroups[groupIndex] === undefined) {
|
|
|
388 parts[i] = '(?:';
|
|
|
389 }
|
|
|
390 } else if ('\\' === p.charAt(0)) {
|
|
|
391 var decimalValue = +p.substring(1);
|
|
|
392 if (decimalValue && decimalValue <= groupIndex) {
|
|
|
393 parts[i] = '\\' + capturedGroups[groupIndex];
|
|
|
394 }
|
|
|
395 }
|
|
|
396 }
|
|
|
397
|
|
|
398 // Remove any prefix anchors so that the output will match anywhere.
|
|
|
399 // ^^ really does mean an anchored match though.
|
|
|
400 for (var i = 0, groupIndex = 0; i < n; ++i) {
|
|
|
401 if ('^' === parts[i] && '^' !== parts[i + 1]) { parts[i] = ''; }
|
|
|
402 }
|
|
|
403
|
|
|
404 // Expand letters to groups to handle mixing of case-sensitive and
|
|
|
405 // case-insensitive patterns if necessary.
|
|
|
406 if (regex.ignoreCase && needToFoldCase) {
|
|
|
407 for (var i = 0; i < n; ++i) {
|
|
|
408 var p = parts[i];
|
|
|
409 var ch0 = p.charAt(0);
|
|
|
410 if (p.length >= 2 && ch0 === '[') {
|
|
|
411 parts[i] = caseFoldCharset(p);
|
|
|
412 } else if (ch0 !== '\\') {
|
|
|
413 // TODO: handle letters in numeric escapes.
|
|
|
414 parts[i] = p.replace(
|
|
|
415 /[a-zA-Z]/g,
|
|
|
416 function (ch) {
|
|
|
417 var cc = ch.charCodeAt(0);
|
|
|
418 return '[' + String.fromCharCode(cc & ~32, cc | 32) + ']';
|
|
|
419 });
|
|
|
420 }
|
|
|
421 }
|
|
|
422 }
|
|
|
423
|
|
|
424 return parts.join('');
|
|
|
425 }
|
|
|
426
|
|
|
427 var rewritten = [];
|
|
|
428 for (var i = 0, n = regexs.length; i < n; ++i) {
|
|
|
429 var regex = regexs[i];
|
|
|
430 if (regex.global || regex.multiline) { throw new Error('' + regex); }
|
|
|
431 rewritten.push(
|
|
|
432 '(?:' + allowAnywhereFoldCaseAndRenumberGroups(regex) + ')');
|
|
|
433 }
|
|
|
434
|
|
|
435 return new RegExp(rewritten.join('|'), ignoreCase ? 'gi' : 'g');
|
|
|
436 }
|
|
|
437
|
|
|
438
|
|
|
439 /**
|
|
|
440 * Split markup into a string of source code and an array mapping ranges in
|
|
|
441 * that string to the text nodes in which they appear.
|
|
|
442 *
|
|
|
443 * <p>
|
|
|
444 * The HTML DOM structure:</p>
|
|
|
445 * <pre>
|
|
|
446 * (Element "p"
|
|
|
447 * (Element "b"
|
|
|
448 * (Text "print ")) ; #1
|
|
|
449 * (Text "'Hello '") ; #2
|
|
|
450 * (Element "br") ; #3
|
|
|
451 * (Text " + 'World';")) ; #4
|
|
|
452 * </pre>
|
|
|
453 * <p>
|
|
|
454 * corresponds to the HTML
|
|
|
455 * {@code <p><b>print </b>'Hello '<br> + 'World';</p>}.</p>
|
|
|
456 *
|
|
|
457 * <p>
|
|
|
458 * It will produce the output:</p>
|
|
|
459 * <pre>
|
|
|
460 * {
|
|
|
461 * source: "print 'Hello '\n + 'World';",
|
|
|
462 * // 1 2
|
|
|
463 * // 012345678901234 5678901234567
|
|
|
464 * spans: [0, #1, 6, #2, 14, #3, 15, #4]
|
|
|
465 * }
|
|
|
466 * </pre>
|
|
|
467 * <p>
|
|
|
468 * where #1 is a reference to the {@code "print "} text node above, and so
|
|
|
469 * on for the other text nodes.
|
|
|
470 * </p>
|
|
|
471 *
|
|
|
472 * <p>
|
|
|
473 * The {@code} spans array is an array of pairs. Even elements are the start
|
|
|
474 * indices of substrings, and odd elements are the text nodes (or BR elements)
|
|
|
475 * that contain the text for those substrings.
|
|
|
476 * Substrings continue until the next index or the end of the source.
|
|
|
477 * </p>
|
|
|
478 *
|
|
|
479 * @param {Node} node an HTML DOM subtree containing source-code.
|
|
|
480 * @return {Object} source code and the text nodes in which they occur.
|
|
|
481 */
|
|
|
482 function extractSourceSpans(node) {
|
|
|
483 var nocode = /(?:^|\s)nocode(?:\s|$)/;
|
|
|
484
|
|
|
485 var chunks = [];
|
|
|
486 var length = 0;
|
|
|
487 var spans = [];
|
|
|
488 var k = 0;
|
|
|
489
|
|
|
490 var whitespace;
|
|
|
491 if (node.currentStyle) {
|
|
|
492 whitespace = node.currentStyle.whiteSpace;
|
|
|
493 } else if (window.getComputedStyle) {
|
|
|
494 whitespace = document.defaultView.getComputedStyle(node, null)
|
|
|
495 .getPropertyValue('white-space');
|
|
|
496 }
|
|
|
497 var isPreformatted = whitespace && 'pre' === whitespace.substring(0, 3);
|
|
|
498
|
|
|
499 function walk(node) {
|
|
|
500 switch (node.nodeType) {
|
|
|
501 case 1: // Element
|
|
|
502 if (nocode.test(node.className)) { return; }
|
|
|
503 for (var child = node.firstChild; child; child = child.nextSibling) {
|
|
|
504 walk(child);
|
|
|
505 }
|
|
|
506 var nodeName = node.nodeName;
|
|
|
507 if ('BR' === nodeName || 'LI' === nodeName) {
|
|
|
508 chunks[k] = '\n';
|
|
|
509 spans[k << 1] = length++;
|
|
|
510 spans[(k++ << 1) | 1] = node;
|
|
|
511 }
|
|
|
512 break;
|
|
|
513 case 3: case 4: // Text
|
|
|
514 var text = node.nodeValue;
|
|
|
515 if (text.length) {
|
|
|
516 if (!isPreformatted) {
|
|
|
517 text = text.replace(/[ \t\r\n]+/g, ' ');
|
|
|
518 } else {
|
|
|
519 text = text.replace(/\r\n?/g, '\n'); // Normalize newlines.
|
|
|
520 }
|
|
|
521 // TODO: handle tabs here?
|
|
|
522 chunks[k] = text;
|
|
|
523 spans[k << 1] = length;
|
|
|
524 length += text.length;
|
|
|
525 spans[(k++ << 1) | 1] = node;
|
|
|
526 }
|
|
|
527 break;
|
|
|
528 }
|
|
|
529 }
|
|
|
530
|
|
|
531 walk(node);
|
|
|
532
|
|
|
533 return {
|
|
|
534 source: chunks.join('').replace(/\n$/, ''),
|
|
|
535 spans: spans
|
|
|
536 };
|
|
|
537 }
|
|
|
538
|
|
|
539
|
|
|
540 /**
|
|
|
541 * Apply the given language handler to sourceCode and add the resulting
|
|
|
542 * decorations to out.
|
|
|
543 * @param {number} basePos the index of sourceCode within the chunk of source
|
|
|
544 * whose decorations are already present on out.
|
|
|
545 */
|
|
|
546 function appendDecorations(basePos, sourceCode, langHandler, out) {
|
|
|
547 if (!sourceCode) { return; }
|
|
|
548 var job = {
|
|
|
549 source: sourceCode,
|
|
|
550 basePos: basePos
|
|
|
551 };
|
|
|
552 langHandler(job);
|
|
|
553 out.push.apply(out, job.decorations);
|
|
|
554 }
|
|
|
555
|
|
|
556 /** Given triples of [style, pattern, context] returns a lexing function,
|
|
|
557 * The lexing function interprets the patterns to find token boundaries and
|
|
|
558 * returns a decoration list of the form
|
|
|
559 * [index_0, style_0, index_1, style_1, ..., index_n, style_n]
|
|
|
560 * where index_n is an index into the sourceCode, and style_n is a style
|
|
|
561 * constant like PR_PLAIN. index_n-1 <= index_n, and style_n-1 applies to
|
|
|
562 * all characters in sourceCode[index_n-1:index_n].
|
|
|
563 *
|
|
|
564 * The stylePatterns is a list whose elements have the form
|
|
|
565 * [style : string, pattern : RegExp, DEPRECATED, shortcut : string].
|
|
|
566 *
|
|
|
567 * Style is a style constant like PR_PLAIN, or can be a string of the
|
|
|
568 * form 'lang-FOO', where FOO is a language extension describing the
|
|
|
569 * language of the portion of the token in $1 after pattern executes.
|
|
|
570 * E.g., if style is 'lang-lisp', and group 1 contains the text
|
|
|
571 * '(hello (world))', then that portion of the token will be passed to the
|
|
|
572 * registered lisp handler for formatting.
|
|
|
573 * The text before and after group 1 will be restyled using this decorator
|
|
|
574 * so decorators should take care that this doesn't result in infinite
|
|
|
575 * recursion. For example, the HTML lexer rule for SCRIPT elements looks
|
|
|
576 * something like ['lang-js', /<[s]cript>(.+?)<\/script>/]. This may match
|
|
|
577 * '<script>foo()<\/script>', which would cause the current decorator to
|
|
|
578 * be called with '<script>' which would not match the same rule since
|
|
|
579 * group 1 must not be empty, so it would be instead styled as PR_TAG by
|
|
|
580 * the generic tag rule. The handler registered for the 'js' extension would
|
|
|
581 * then be called with 'foo()', and finally, the current decorator would
|
|
|
582 * be called with '<\/script>' which would not match the original rule and
|
|
|
583 * so the generic tag rule would identify it as a tag.
|
|
|
584 *
|
|
|
585 * Pattern must only match prefixes, and if it matches a prefix, then that
|
|
|
586 * match is considered a token with the same style.
|
|
|
587 *
|
|
|
588 * Context is applied to the last non-whitespace, non-comment token
|
|
|
589 * recognized.
|
|
|
590 *
|
|
|
591 * Shortcut is an optional string of characters, any of which, if the first
|
|
|
592 * character, gurantee that this pattern and only this pattern matches.
|
|
|
593 *
|
|
|
594 * @param {Array} shortcutStylePatterns patterns that always start with
|
|
|
595 * a known character. Must have a shortcut string.
|
|
|
596 * @param {Array} fallthroughStylePatterns patterns that will be tried in
|
|
|
597 * order if the shortcut ones fail. May have shortcuts.
|
|
|
598 *
|
|
|
599 * @return {function (Object)} a
|
|
|
600 * function that takes source code and returns a list of decorations.
|
|
|
601 */
|
|
|
602 function createSimpleLexer(shortcutStylePatterns, fallthroughStylePatterns) {
|
|
|
603 var shortcuts = {};
|
|
|
604 var tokenizer;
|
|
|
605 (function () {
|
|
|
606 var allPatterns = shortcutStylePatterns.concat(fallthroughStylePatterns);
|
|
|
607 var allRegexs = [];
|
|
|
608 var regexKeys = {};
|
|
|
609 for (var i = 0, n = allPatterns.length; i < n; ++i) {
|
|
|
610 var patternParts = allPatterns[i];
|
|
|
611 var shortcutChars = patternParts[3];
|
|
|
612 if (shortcutChars) {
|
|
|
613 for (var c = shortcutChars.length; --c >= 0;) {
|
|
|
614 shortcuts[shortcutChars.charAt(c)] = patternParts;
|
|
|
615 }
|
|
|
616 }
|
|
|
617 var regex = patternParts[1];
|
|
|
618 var k = '' + regex;
|
|
|
619 if (!regexKeys.hasOwnProperty(k)) {
|
|
|
620 allRegexs.push(regex);
|
|
|
621 regexKeys[k] = null;
|
|
|
622 }
|
|
|
623 }
|
|
|
624 allRegexs.push(/[\0-\uffff]/);
|
|
|
625 tokenizer = combinePrefixPatterns(allRegexs);
|
|
|
626 })();
|
|
|
627
|
|
|
628 var nPatterns = fallthroughStylePatterns.length;
|
|
|
629 var notWs = /\S/;
|
|
|
630
|
|
|
631 /**
|
|
|
632 * Lexes job.source and produces an output array job.decorations of style
|
|
|
633 * classes preceded by the position at which they start in job.source in
|
|
|
634 * order.
|
|
|
635 *
|
|
|
636 * @param {Object} job an object like {@code
|
|
|
637 * source: {string} sourceText plain text,
|
|
|
638 * basePos: {int} position of job.source in the larger chunk of
|
|
|
639 * sourceCode.
|
|
|
640 * }
|
|
|
641 */
|
|
|
642 var decorate = function (job) {
|
|
|
643 var sourceCode = job.source, basePos = job.basePos;
|
|
|
644 /** Even entries are positions in source in ascending order. Odd enties
|
|
|
645 * are style markers (e.g., PR_COMMENT) that run from that position until
|
|
|
646 * the end.
|
|
|
647 * @type {Array.<number|string>}
|
|
|
648 */
|
|
|
649 var decorations = [basePos, PR_PLAIN];
|
|
|
650 var pos = 0; // index into sourceCode
|
|
|
651 var tokens = sourceCode.match(tokenizer) || [];
|
|
|
652 var styleCache = {};
|
|
|
653
|
|
|
654 for (var ti = 0, nTokens = tokens.length; ti < nTokens; ++ti) {
|
|
|
655 var token = tokens[ti];
|
|
|
656 var style = styleCache[token];
|
|
|
657 var match = void 0;
|
|
|
658
|
|
|
659 var isEmbedded;
|
|
|
660 if (typeof style === 'string') {
|
|
|
661 isEmbedded = false;
|
|
|
662 } else {
|
|
|
663 var patternParts = shortcuts[token.charAt(0)];
|
|
|
664 if (patternParts) {
|
|
|
665 match = token.match(patternParts[1]);
|
|
|
666 style = patternParts[0];
|
|
|
667 } else {
|
|
|
668 for (var i = 0; i < nPatterns; ++i) {
|
|
|
669 patternParts = fallthroughStylePatterns[i];
|
|
|
670 match = token.match(patternParts[1]);
|
|
|
671 if (match) {
|
|
|
672 style = patternParts[0];
|
|
|
673 break;
|
|
|
674 }
|
|
|
675 }
|
|
|
676
|
|
|
677 if (!match) { // make sure that we make progress
|
|
|
678 style = PR_PLAIN;
|
|
|
679 }
|
|
|
680 }
|
|
|
681
|
|
|
682 isEmbedded = style.length >= 5 && 'lang-' === style.substring(0, 5);
|
|
|
683 if (isEmbedded && !(match && typeof match[1] === 'string')) {
|
|
|
684 isEmbedded = false;
|
|
|
685 style = PR_SOURCE;
|
|
|
686 }
|
|
|
687
|
|
|
688 if (!isEmbedded) { styleCache[token] = style; }
|
|
|
689 }
|
|
|
690
|
|
|
691 var tokenStart = pos;
|
|
|
692 pos += token.length;
|
|
|
693
|
|
|
694 if (!isEmbedded) {
|
|
|
695 decorations.push(basePos + tokenStart, style);
|
|
|
696 } else { // Treat group 1 as an embedded block of source code.
|
|
|
697 var embeddedSource = match[1];
|
|
|
698 var embeddedSourceStart = token.indexOf(embeddedSource);
|
|
|
699 var embeddedSourceEnd = embeddedSourceStart + embeddedSource.length;
|
|
|
700 if (match[2]) {
|
|
|
701 // If embeddedSource can be blank, then it would match at the
|
|
|
702 // beginning which would cause us to infinitely recurse on the
|
|
|
703 // entire token, so we catch the right context in match[2].
|
|
|
704 embeddedSourceEnd = token.length - match[2].length;
|
|
|
705 embeddedSourceStart = embeddedSourceEnd - embeddedSource.length;
|
|
|
706 }
|
|
|
707 var lang = style.substring(5);
|
|
|
708 // Decorate the left of the embedded source
|
|
|
709 appendDecorations(
|
|
|
710 basePos + tokenStart,
|
|
|
711 token.substring(0, embeddedSourceStart),
|
|
|
712 decorate, decorations);
|
|
|
713 // Decorate the embedded source
|
|
|
714 appendDecorations(
|
|
|
715 basePos + tokenStart + embeddedSourceStart,
|
|
|
716 embeddedSource,
|
|
|
717 langHandlerForExtension(lang, embeddedSource),
|
|
|
718 decorations);
|
|
|
719 // Decorate the right of the embedded section
|
|
|
720 appendDecorations(
|
|
|
721 basePos + tokenStart + embeddedSourceEnd,
|
|
|
722 token.substring(embeddedSourceEnd),
|
|
|
723 decorate, decorations);
|
|
|
724 }
|
|
|
725 }
|
|
|
726 job.decorations = decorations;
|
|
|
727 };
|
|
|
728 return decorate;
|
|
|
729 }
|
|
|
730
|
|
|
731 /** returns a function that produces a list of decorations from source text.
|
|
|
732 *
|
|
|
733 * This code treats ", ', and ` as string delimiters, and \ as a string
|
|
|
734 * escape. It does not recognize perl's qq() style strings.
|
|
|
735 * It has no special handling for double delimiter escapes as in basic, or
|
|
|
736 * the tripled delimiters used in python, but should work on those regardless
|
|
|
737 * although in those cases a single string literal may be broken up into
|
|
|
738 * multiple adjacent string literals.
|
|
|
739 *
|
|
|
740 * It recognizes C, C++, and shell style comments.
|
|
|
741 *
|
|
|
742 * @param {Object} options a set of optional parameters.
|
|
|
743 * @return {function (Object)} a function that examines the source code
|
|
|
744 * in the input job and builds the decoration list.
|
|
|
745 */
|
|
|
746 function sourceDecorator(options) {
|
|
|
747 var shortcutStylePatterns = [], fallthroughStylePatterns = [];
|
|
|
748 if (options['tripleQuotedStrings']) {
|
|
|
749 // '''multi-line-string''', 'single-line-string', and double-quoted
|
|
|
750 shortcutStylePatterns.push(
|
|
|
751 [PR_STRING, /^(?:\'\'\'(?:[^\'\\]|\\[\s\S]|\'{1,2}(?=[^\']))*(?:\'\'\'|$)|\"\"\"(?:[^\"\\]|\\[\s\S]|\"{1,2}(?=[^\"]))*(?:\"\"\"|$)|\'(?:[^\\\']|\\[\s\S])*(?:\'|$)|\"(?:[^\\\"]|\\[\s\S])*(?:\"|$))/,
|
|
|
752 null, '\'"']);
|
|
|
753 } else if (options['multiLineStrings']) {
|
|
|
754 // 'multi-line-string', "multi-line-string"
|
|
|
755 shortcutStylePatterns.push(
|
|
|
756 [PR_STRING, /^(?:\'(?:[^\\\']|\\[\s\S])*(?:\'|$)|\"(?:[^\\\"]|\\[\s\S])*(?:\"|$)|\`(?:[^\\\`]|\\[\s\S])*(?:\`|$))/,
|
|
|
757 null, '\'"`']);
|
|
|
758 } else {
|
|
|
759 // 'single-line-string', "single-line-string"
|
|
|
760 shortcutStylePatterns.push(
|
|
|
761 [PR_STRING,
|
|
|
762 /^(?:\'(?:[^\\\'\r\n]|\\.)*(?:\'|$)|\"(?:[^\\\"\r\n]|\\.)*(?:\"|$))/,
|
|
|
763 null, '"\'']);
|
|
|
764 }
|
|
|
765 if (options['verbatimStrings']) {
|
|
|
766 // verbatim-string-literal production from the C# grammar. See issue 93.
|
|
|
767 fallthroughStylePatterns.push(
|
|
|
768 [PR_STRING, /^@\"(?:[^\"]|\"\")*(?:\"|$)/, null]);
|
|
|
769 }
|
|
|
770 var hc = options['hashComments'];
|
|
|
771 if (hc) {
|
|
|
772 if (options['cStyleComments']) {
|
|
|
773 if (hc > 1) { // multiline hash comments
|
|
|
774 shortcutStylePatterns.push(
|
|
|
775 [PR_COMMENT, /^#(?:##(?:[^#]|#(?!##))*(?:###|$)|.*)/, null, '#']);
|
|
|
776 } else {
|
|
|
777 // Stop C preprocessor declarations at an unclosed open comment
|
|
|
778 shortcutStylePatterns.push(
|
|
|
779 [PR_COMMENT, /^#(?:(?:define|elif|else|endif|error|ifdef|include|ifndef|line|pragma|undef|warning)\b|[^\r\n]*)/,
|
|
|
780 null, '#']);
|
|
|
781 }
|
|
|
782 fallthroughStylePatterns.push(
|
|
|
783 [PR_STRING,
|
|
|
784 /^<(?:(?:(?:\.\.\/)*|\/?)(?:[\w-]+(?:\/[\w-]+)+)?[\w-]+\.h|[a-z]\w*)>/,
|
|
|
785 null]);
|
|
|
786 } else {
|
|
|
787 shortcutStylePatterns.push([PR_COMMENT, /^#[^\r\n]*/, null, '#']);
|
|
|
788 }
|
|
|
789 }
|
|
|
790 if (options['cStyleComments']) {
|
|
|
791 fallthroughStylePatterns.push([PR_COMMENT, /^\/\/[^\r\n]*/, null]);
|
|
|
792 fallthroughStylePatterns.push(
|
|
|
793 [PR_COMMENT, /^\/\*[\s\S]*?(?:\*\/|$)/, null]);
|
|
|
794 }
|
|
|
795 if (options['regexLiterals']) {
|
|
|
796 var REGEX_LITERAL = (
|
|
|
797 // A regular expression literal starts with a slash that is
|
|
|
798 // not followed by * or / so that it is not confused with
|
|
|
799 // comments.
|
|
|
800 '/(?=[^/*])'
|
|
|
801 // and then contains any number of raw characters,
|
|
|
802 + '(?:[^/\\x5B\\x5C]'
|
|
|
803 // escape sequences (\x5C),
|
|
|
804 + '|\\x5C[\\s\\S]'
|
|
|
805 // or non-nesting character sets (\x5B\x5D);
|
|
|
806 + '|\\x5B(?:[^\\x5C\\x5D]|\\x5C[\\s\\S])*(?:\\x5D|$))+'
|
|
|
807 // finally closed by a /.
|
|
|
808 + '/');
|
|
|
809 fallthroughStylePatterns.push(
|
|
|
810 ['lang-regex',
|
|
|
811 new RegExp('^' + REGEXP_PRECEDER_PATTERN + '(' + REGEX_LITERAL + ')')
|
|
|
812 ]);
|
|
|
813 }
|
|
|
814
|
|
|
815 var keywords = options['keywords'].replace(/^\s+|\s+$/g, '');
|
|
|
816 if (keywords.length) {
|
|
|
817 fallthroughStylePatterns.push(
|
|
|
818 [PR_KEYWORD,
|
|
|
819 new RegExp('^(?:' + keywords.replace(/\s+/g, '|') + ')\\b'), null]);
|
|
|
820 }
|
|
|
821
|
|
|
822 shortcutStylePatterns.push([PR_PLAIN, /^\s+/, null, ' \r\n\t\xA0']);
|
|
|
823 fallthroughStylePatterns.push(
|
|
|
824 // TODO(mikesamuel): recognize non-latin letters and numerals in idents
|
|
|
825 [PR_LITERAL, /^@[a-z_$][a-z_$@0-9]*/i, null],
|
|
|
826 [PR_TYPE, /^@?[A-Z]+[a-z][A-Za-z_$@0-9]*/, null],
|
|
|
827 [PR_PLAIN, /^[a-z_$][a-z_$@0-9]*/i, null],
|
|
|
828 [PR_LITERAL,
|
|
|
829 new RegExp(
|
|
|
830 '^(?:'
|
|
|
831 // A hex number
|
|
|
832 + '0x[a-f0-9]+'
|
|
|
833 // or an octal or decimal number,
|
|
|
834 + '|(?:\\d(?:_\\d+)*\\d*(?:\\.\\d*)?|\\.\\d\\+)'
|
|
|
835 // possibly in scientific notation
|
|
|
836 + '(?:e[+\\-]?\\d+)?'
|
|
|
837 + ')'
|
|
|
838 // with an optional modifier like UL for unsigned long
|
|
|
839 + '[a-z]*', 'i'),
|
|
|
840 null, '0123456789'],
|
|
|
841 // Don't treat escaped quotes in bash as starting strings. See issue 144.
|
|
|
842 [PR_PLAIN, /^\\[\s\S]?/, null],
|
|
|
843 [PR_PUNCTUATION, /^.[^\s\w\.$@\'\"\`\/\#\\]*/, null]);
|
|
|
844
|
|
|
845 return createSimpleLexer(shortcutStylePatterns, fallthroughStylePatterns);
|
|
|
846 }
|
|
|
847
|
|
|
848 var decorateSource = sourceDecorator({
|
|
|
849 'keywords': ALL_KEYWORDS,
|
|
|
850 'hashComments': true,
|
|
|
851 'cStyleComments': true,
|
|
|
852 'multiLineStrings': true,
|
|
|
853 'regexLiterals': true
|
|
|
854 });
|
|
|
855
|
|
|
856 /**
|
|
|
857 * Given a DOM subtree, wraps it in a list, and puts each line into its own
|
|
|
858 * list item.
|
|
|
859 *
|
|
|
860 * @param {Node} node modified in place. Its content is pulled into an
|
|
|
861 * HTMLOListElement, and each line is moved into a separate list item.
|
|
|
862 * This requires cloning elements, so the input might not have unique
|
|
|
863 * IDs after numbering.
|
|
|
864 */
|
|
|
865 function numberLines(node, opt_startLineNum) {
|
|
|
866 var nocode = /(?:^|\s)nocode(?:\s|$)/;
|
|
|
867 var lineBreak = /\r\n?|\n/;
|
|
|
868
|
|
|
869 var document = node.ownerDocument;
|
|
|
870
|
|
|
871 var whitespace;
|
|
|
872 if (node.currentStyle) {
|
|
|
873 whitespace = node.currentStyle.whiteSpace;
|
|
|
874 } else if (window.getComputedStyle) {
|
|
|
875 whitespace = document.defaultView.getComputedStyle(node, null)
|
|
|
876 .getPropertyValue('white-space');
|
|
|
877 }
|
|
|
878 // If it's preformatted, then we need to split lines on line breaks
|
|
|
879 // in addition to <BR>s.
|
|
|
880 var isPreformatted = whitespace && 'pre' === whitespace.substring(0, 3);
|
|
|
881
|
|
|
882 var li = document.createElement('LI');
|
|
|
883 while (node.firstChild) {
|
|
|
884 li.appendChild(node.firstChild);
|
|
|
885 }
|
|
|
886 // An array of lines. We split below, so this is initialized to one
|
|
|
887 // un-split line.
|
|
|
888 var listItems = [li];
|
|
|
889
|
|
|
890 function walk(node) {
|
|
|
891 switch (node.nodeType) {
|
|
|
892 case 1: // Element
|
|
|
893 if (nocode.test(node.className)) { break; }
|
|
|
894 if ('BR' === node.nodeName) {
|
|
|
895 breakAfter(node);
|
|
|
896 // Discard the <BR> since it is now flush against a </LI>.
|
|
|
897 if (node.parentNode) {
|
|
|
898 node.parentNode.removeChild(node);
|
|
|
899 }
|
|
|
900 } else {
|
|
|
901 for (var child = node.firstChild; child; child = child.nextSibling) {
|
|
|
902 walk(child);
|
|
|
903 }
|
|
|
904 }
|
|
|
905 break;
|
|
|
906 case 3: case 4: // Text
|
|
|
907 if (isPreformatted) {
|
|
|
908 var text = node.nodeValue;
|
|
|
909 var match = text.match(lineBreak);
|
|
|
910 if (match) {
|
|
|
911 var firstLine = text.substring(0, match.index);
|
|
|
912 node.nodeValue = firstLine;
|
|
|
913 var tail = text.substring(match.index + match[0].length);
|
|
|
914 if (tail) {
|
|
|
915 var parent = node.parentNode;
|
|
|
916 parent.insertBefore(
|
|
|
917 document.createTextNode(tail), node.nextSibling);
|
|
|
918 }
|
|
|
919 breakAfter(node);
|
|
|
920 if (!firstLine) {
|
|
|
921 // Don't leave blank text nodes in the DOM.
|
|
|
922 node.parentNode.removeChild(node);
|
|
|
923 }
|
|
|
924 }
|
|
|
925 }
|
|
|
926 break;
|
|
|
927 }
|
|
|
928 }
|
|
|
929
|
|
|
930 // Split a line after the given node.
|
|
|
931 function breakAfter(lineEndNode) {
|
|
|
932 // If there's nothing to the right, then we can skip ending the line
|
|
|
933 // here, and move root-wards since splitting just before an end-tag
|
|
|
934 // would require us to create a bunch of empty copies.
|
|
|
935 while (!lineEndNode.nextSibling) {
|
|
|
936 lineEndNode = lineEndNode.parentNode;
|
|
|
937 if (!lineEndNode) { return; }
|
|
|
938 }
|
|
|
939
|
|
|
940 function breakLeftOf(limit, copy) {
|
|
|
941 // Clone shallowly if this node needs to be on both sides of the break.
|
|
|
942 var rightSide = copy ? limit.cloneNode(false) : limit;
|
|
|
943 var parent = limit.parentNode;
|
|
|
944 if (parent) {
|
|
|
945 // We clone the parent chain.
|
|
|
946 // This helps us resurrect important styling elements that cross lines.
|
|
|
947 // E.g. in <i>Foo<br>Bar</i>
|
|
|
948 // should be rewritten to <li><i>Foo</i></li><li><i>Bar</i></li>.
|
|
|
949 var parentClone = breakLeftOf(parent, 1);
|
|
|
950 // Move the clone and everything to the right of the original
|
|
|
951 // onto the cloned parent.
|
|
|
952 var next = limit.nextSibling;
|
|
|
953 parentClone.appendChild(rightSide);
|
|
|
954 for (var sibling = next; sibling; sibling = next) {
|
|
|
955 next = sibling.nextSibling;
|
|
|
956 parentClone.appendChild(sibling);
|
|
|
957 }
|
|
|
958 }
|
|
|
959 return rightSide;
|
|
|
960 }
|
|
|
961
|
|
|
962 var copiedListItem = breakLeftOf(lineEndNode.nextSibling, 0);
|
|
|
963
|
|
|
964 // Walk the parent chain until we reach an unattached LI.
|
|
|
965 for (var parent;
|
|
|
966 // Check nodeType since IE invents document fragments.
|
|
|
967 (parent = copiedListItem.parentNode) && parent.nodeType === 1;) {
|
|
|
968 copiedListItem = parent;
|
|
|
969 }
|
|
|
970 // Put it on the list of lines for later processing.
|
|
|
971 listItems.push(copiedListItem);
|
|
|
972 }
|
|
|
973
|
|
|
974 // Split lines while there are lines left to split.
|
|
|
975 for (var i = 0; // Number of lines that have been split so far.
|
|
|
976 i < listItems.length; // length updated by breakAfter calls.
|
|
|
977 ++i) {
|
|
|
978 walk(listItems[i]);
|
|
|
979 }
|
|
|
980
|
|
|
981 // Make sure numeric indices show correctly.
|
|
|
982 if (opt_startLineNum === (opt_startLineNum|0)) {
|
|
|
983 listItems[0].setAttribute('value', opt_startLineNum);
|
|
|
984 }
|
|
|
985
|
|
|
986 var ol = document.createElement('OL');
|
|
|
987 ol.className = 'linenums';
|
|
|
988 var offset = Math.max(0, ((opt_startLineNum - 1 /* zero index */)) | 0) || 0;
|
|
|
989 for (var i = 0, n = listItems.length; i < n; ++i) {
|
|
|
990 li = listItems[i];
|
|
|
991 // Stick a class on the LIs so that stylesheets can
|
|
|
992 // color odd/even rows, or any other row pattern that
|
|
|
993 // is co-prime with 10.
|
|
|
994 li.className = 'L' + ((i + offset) % 10);
|
|
|
995 if (!li.firstChild) {
|
|
|
996 li.appendChild(document.createTextNode('\xA0'));
|
|
|
997 }
|
|
|
998 ol.appendChild(li);
|
|
|
999 }
|
|
|
1000
|
|
|
1001 node.appendChild(ol);
|
|
|
1002 }
|
|
|
1003
|
|
|
1004 /**
|
|
|
1005 * Breaks {@code job.source} around style boundaries in {@code job.decorations}
|
|
|
1006 * and modifies {@code job.sourceNode} in place.
|
|
|
1007 * @param {Object} job like <pre>{
|
|
|
1008 * source: {string} source as plain text,
|
|
|
1009 * spans: {Array.<number|Node>} alternating span start indices into source
|
|
|
1010 * and the text node or element (e.g. {@code <BR>}) corresponding to that
|
|
|
1011 * span.
|
|
|
1012 * decorations: {Array.<number|string} an array of style classes preceded
|
|
|
1013 * by the position at which they start in job.source in order
|
|
|
1014 * }</pre>
|
|
|
1015 * @private
|
|
|
1016 */
|
|
|
1017 function recombineTagsAndDecorations(job) {
|
|
|
1018 var isIE = /\bMSIE\b/.test(navigator.userAgent);
|
|
|
1019 var newlineRe = /\n/g;
|
|
|
1020
|
|
|
1021 var source = job.source;
|
|
|
1022 var sourceLength = source.length;
|
|
|
1023 // Index into source after the last code-unit recombined.
|
|
|
1024 var sourceIndex = 0;
|
|
|
1025
|
|
|
1026 var spans = job.spans;
|
|
|
1027 var nSpans = spans.length;
|
|
|
1028 // Index into spans after the last span which ends at or before sourceIndex.
|
|
|
1029 var spanIndex = 0;
|
|
|
1030
|
|
|
1031 var decorations = job.decorations;
|
|
|
1032 var nDecorations = decorations.length;
|
|
|
1033 // Index into decorations after the last decoration which ends at or before sourceIndex.
|
|
|
1034 var decorationIndex = 0;
|
|
|
1035
|
|
|
1036 // Simplify decorations.
|
|
|
1037 var decPos = 0;
|
|
|
1038 for (var i = 0; i < nDecorations;) {
|
|
|
1039 // Skip over any zero-length decorations.
|
|
|
1040 var startPos = decorations[i];
|
|
|
1041 var start = i;
|
|
|
1042 while (start + 2 < nDecorations && decorations[start + 2] === startPos) {
|
|
|
1043 start += 2;
|
|
|
1044 }
|
|
|
1045 // Conflate all adjacent decorations that use the same style.
|
|
|
1046 var startDec = decorations[start + 1];
|
|
|
1047 var end = start + 2;
|
|
|
1048 while (end + 2 <= nDecorations
|
|
|
1049 && (decorations[end + 1] === startDec
|
|
|
1050 || decorations[end] === decorations[end + 2])) {
|
|
|
1051 end += 2;
|
|
|
1052 }
|
|
|
1053 decorations[decPos++] = startPos;
|
|
|
1054 decorations[decPos++] = startDec;
|
|
|
1055 i = end;
|
|
|
1056 }
|
|
|
1057
|
|
|
1058 // Strip any zero-length decoration at the end.
|
|
|
1059 if (decPos && decorations[decPos - 2] === sourceLength) { decPos -= 2; }
|
|
|
1060 nDecorations = decorations.length = decPos;
|
|
|
1061
|
|
|
1062 var decoration = null;
|
|
|
1063 while (spanIndex < nSpans) {
|
|
|
1064 var spanStart = spans[spanIndex];
|
|
|
1065 var spanEnd = spans[spanIndex + 2] || sourceLength;
|
|
|
1066
|
|
|
1067 var decStart = decorations[decorationIndex];
|
|
|
1068 var decEnd = decorations[decorationIndex + 2] || sourceLength;
|
|
|
1069
|
|
|
1070 var end = Math.min(spanEnd, decEnd);
|
|
|
1071
|
|
|
1072 var textNode = spans[spanIndex + 1];
|
|
|
1073 if (textNode.nodeType !== 1) { // Don't muck with <BR>s or <LI>s
|
|
|
1074 var styledText = source.substring(sourceIndex, end);
|
|
|
1075 // This may seem bizarre, and it is. Emitting LF on IE causes the
|
|
|
1076 // code to display with spaces instead of line breaks.
|
|
|
1077 // Emitting Windows standard issue linebreaks (CRLF) causes a blank
|
|
|
1078 // space to appear at the beginning of every line but the first.
|
|
|
1079 // Emitting an old Mac OS 9 line separator makes everything spiffy.
|
|
|
1080 if (isIE) { styledText = styledText.replace(newlineRe, '\r'); }
|
|
|
1081 textNode.nodeValue = styledText;
|
|
|
1082 var document = textNode.ownerDocument;
|
|
|
1083 var span = document.createElement('SPAN');
|
|
|
1084 span.className = decorations[decorationIndex + 1];
|
|
|
1085 var parentNode = textNode.parentNode;
|
|
|
1086 parentNode.replaceChild(span, textNode);
|
|
|
1087 span.appendChild(textNode);
|
|
|
1088 if (sourceIndex < spanEnd) { // Split off a text node.
|
|
|
1089 spans[spanIndex + 1] = textNode
|
|
|
1090 // TODO: Possibly optimize by using '' if there's no flicker.
|
|
|
1091 = document.createTextNode(source.substring(end, spanEnd));
|
|
|
1092 parentNode.insertBefore(textNode, span.nextSibling);
|
|
|
1093 }
|
|
|
1094 }
|
|
|
1095
|
|
|
1096 sourceIndex = end;
|
|
|
1097
|
|
|
1098 if (sourceIndex >= spanEnd) {
|
|
|
1099 spanIndex += 2;
|
|
|
1100 }
|
|
|
1101 if (sourceIndex >= decEnd) {
|
|
|
1102 decorationIndex += 2;
|
|
|
1103 }
|
|
|
1104 }
|
|
|
1105 }
|
|
|
1106
|
|
|
1107
|
|
|
1108 /** Maps language-specific file extensions to handlers. */
|
|
|
1109 var langHandlerRegistry = {};
|
|
|
1110 /** Register a language handler for the given file extensions.
|
|
|
1111 * @param {function (Object)} handler a function from source code to a list
|
|
|
1112 * of decorations. Takes a single argument job which describes the
|
|
|
1113 * state of the computation. The single parameter has the form
|
|
|
1114 * {@code {
|
|
|
1115 * source: {string} as plain text.
|
|
|
1116 * decorations: {Array.<number|string>} an array of style classes
|
|
|
1117 * preceded by the position at which they start in
|
|
|
1118 * job.source in order.
|
|
|
1119 * The language handler should assigned this field.
|
|
|
1120 * basePos: {int} the position of source in the larger source chunk.
|
|
|
1121 * All positions in the output decorations array are relative
|
|
|
1122 * to the larger source chunk.
|
|
|
1123 * } }
|
|
|
1124 * @param {Array.<string>} fileExtensions
|
|
|
1125 */
|
|
|
1126 function registerLangHandler(handler, fileExtensions) {
|
|
|
1127 for (var i = fileExtensions.length; --i >= 0;) {
|
|
|
1128 var ext = fileExtensions[i];
|
|
|
1129 if (!langHandlerRegistry.hasOwnProperty(ext)) {
|
|
|
1130 langHandlerRegistry[ext] = handler;
|
|
|
1131 } else if ('console' in window) {
|
|
|
1132 console['warn']('cannot override language handler %s', ext);
|
|
|
1133 }
|
|
|
1134 }
|
|
|
1135 }
|
|
|
1136 function langHandlerForExtension(extension, source) {
|
|
|
1137 if (!(extension && langHandlerRegistry.hasOwnProperty(extension))) {
|
|
|
1138 // Treat it as markup if the first non whitespace character is a < and
|
|
|
1139 // the last non-whitespace character is a >.
|
|
|
1140 extension = /^\s*</.test(source)
|
|
|
1141 ? 'default-markup'
|
|
|
1142 : 'default-code';
|
|
|
1143 }
|
|
|
1144 return langHandlerRegistry[extension];
|
|
|
1145 }
|
|
|
1146 registerLangHandler(decorateSource, ['default-code']);
|
|
|
1147 registerLangHandler(
|
|
|
1148 createSimpleLexer(
|
|
|
1149 [],
|
|
|
1150 [
|
|
|
1151 [PR_PLAIN, /^[^<?]+/],
|
|
|
1152 [PR_DECLARATION, /^<!\w[^>]*(?:>|$)/],
|
|
|
1153 [PR_COMMENT, /^<\!--[\s\S]*?(?:-\->|$)/],
|
|
|
1154 // Unescaped content in an unknown language
|
|
|
1155 ['lang-', /^<\?([\s\S]+?)(?:\?>|$)/],
|
|
|
1156 ['lang-', /^<%([\s\S]+?)(?:%>|$)/],
|
|
|
1157 [PR_PUNCTUATION, /^(?:<[%?]|[%?]>)/],
|
|
|
1158 ['lang-', /^<xmp\b[^>]*>([\s\S]+?)<\/xmp\b[^>]*>/i],
|
|
|
1159 // Unescaped content in javascript. (Or possibly vbscript).
|
|
|
1160 ['lang-js', /^<script\b[^>]*>([\s\S]*?)(<\/script\b[^>]*>)/i],
|
|
|
1161 // Contains unescaped stylesheet content
|
|
|
1162 ['lang-css', /^<style\b[^>]*>([\s\S]*?)(<\/style\b[^>]*>)/i],
|
|
|
1163 ['lang-in.tag', /^(<\/?[a-z][^<>]*>)/i]
|
|
|
1164 ]),
|
|
|
1165 ['default-markup', 'htm', 'html', 'mxml', 'xhtml', 'xml', 'xsl']);
|
|
|
1166 registerLangHandler(
|
|
|
1167 createSimpleLexer(
|
|
|
1168 [
|
|
|
1169 [PR_PLAIN, /^[\s]+/, null, ' \t\r\n'],
|
|
|
1170 [PR_ATTRIB_VALUE, /^(?:\"[^\"]*\"?|\'[^\']*\'?)/, null, '\"\'']
|
|
|
1171 ],
|
|
|
1172 [
|
|
|
1173 [PR_TAG, /^^<\/?[a-z](?:[\w.:-]*\w)?|\/?>$/i],
|
|
|
1174 [PR_ATTRIB_NAME, /^(?!style[\s=]|on)[a-z](?:[\w:-]*\w)?/i],
|
|
|
1175 ['lang-uq.val', /^=\s*([^>\'\"\s]*(?:[^>\'\"\s\/]|\/(?=\s)))/],
|
|
|
1176 [PR_PUNCTUATION, /^[=<>\/]+/],
|
|
|
1177 ['lang-js', /^on\w+\s*=\s*\"([^\"]+)\"/i],
|
|
|
1178 ['lang-js', /^on\w+\s*=\s*\'([^\']+)\'/i],
|
|
|
1179 ['lang-js', /^on\w+\s*=\s*([^\"\'>\s]+)/i],
|
|
|
1180 ['lang-css', /^style\s*=\s*\"([^\"]+)\"/i],
|
|
|
1181 ['lang-css', /^style\s*=\s*\'([^\']+)\'/i],
|
|
|
1182 ['lang-css', /^style\s*=\s*([^\"\'>\s]+)/i]
|
|
|
1183 ]),
|
|
|
1184 ['in.tag']);
|
|
|
1185 registerLangHandler(
|
|
|
1186 createSimpleLexer([], [[PR_ATTRIB_VALUE, /^[\s\S]+/]]), ['uq.val']);
|
|
|
1187 registerLangHandler(sourceDecorator({
|
|
|
1188 'keywords': CPP_KEYWORDS,
|
|
|
1189 'hashComments': true,
|
|
|
1190 'cStyleComments': true
|
|
|
1191 }), ['c', 'cc', 'cpp', 'cxx', 'cyc', 'm']);
|
|
|
1192 registerLangHandler(sourceDecorator({
|
|
|
1193 'keywords': 'null true false'
|
|
|
1194 }), ['json']);
|
|
|
1195 registerLangHandler(sourceDecorator({
|
|
|
1196 'keywords': CSHARP_KEYWORDS,
|
|
|
1197 'hashComments': true,
|
|
|
1198 'cStyleComments': true,
|
|
|
1199 'verbatimStrings': true
|
|
|
1200 }), ['cs']);
|
|
|
1201 registerLangHandler(sourceDecorator({
|
|
|
1202 'keywords': JAVA_KEYWORDS,
|
|
|
1203 'cStyleComments': true
|
|
|
1204 }), ['java']);
|
|
|
1205 registerLangHandler(sourceDecorator({
|
|
|
1206 'keywords': SH_KEYWORDS,
|
|
|
1207 'hashComments': true,
|
|
|
1208 'multiLineStrings': true
|
|
|
1209 }), ['bsh', 'csh', 'sh']);
|
|
|
1210 registerLangHandler(sourceDecorator({
|
|
|
1211 'keywords': PYTHON_KEYWORDS,
|
|
|
1212 'hashComments': true,
|
|
|
1213 'multiLineStrings': true,
|
|
|
1214 'tripleQuotedStrings': true
|
|
|
1215 }), ['cv', 'py']);
|
|
|
1216 registerLangHandler(sourceDecorator({
|
|
|
1217 'keywords': PERL_KEYWORDS,
|
|
|
1218 'hashComments': true,
|
|
|
1219 'multiLineStrings': true,
|
|
|
1220 'regexLiterals': true
|
|
|
1221 }), ['perl', 'pl', 'pm']);
|
|
|
1222 registerLangHandler(sourceDecorator({
|
|
|
1223 'keywords': RUBY_KEYWORDS,
|
|
|
1224 'hashComments': true,
|
|
|
1225 'multiLineStrings': true,
|
|
|
1226 'regexLiterals': true
|
|
|
1227 }), ['rb']);
|
|
|
1228 registerLangHandler(sourceDecorator({
|
|
|
1229 'keywords': JSCRIPT_KEYWORDS,
|
|
|
1230 'cStyleComments': true,
|
|
|
1231 'regexLiterals': true
|
|
|
1232 }), ['js']);
|
|
|
1233 registerLangHandler(sourceDecorator({
|
|
|
1234 'keywords': COFFEE_KEYWORDS,
|
|
|
1235 'hashComments': 3, // ### style block comments
|
|
|
1236 'cStyleComments': true,
|
|
|
1237 'multilineStrings': true,
|
|
|
1238 'tripleQuotedStrings': true,
|
|
|
1239 'regexLiterals': true
|
|
|
1240 }), ['coffee']);
|
|
|
1241 registerLangHandler(createSimpleLexer([], [[PR_STRING, /^[\s\S]+/]]), ['regex']);
|
|
|
1242
|
|
|
1243 function applyDecorator(job) {
|
|
|
1244 var opt_langExtension = job.langExtension;
|
|
|
1245
|
|
|
1246 try {
|
|
|
1247 // Extract tags, and convert the source code to plain text.
|
|
|
1248 var sourceAndSpans = extractSourceSpans(job.sourceNode);
|
|
|
1249 /** Plain text. @type {string} */
|
|
|
1250 var source = sourceAndSpans.source;
|
|
|
1251 job.source = source;
|
|
|
1252 job.spans = sourceAndSpans.spans;
|
|
|
1253 job.basePos = 0;
|
|
|
1254
|
|
|
1255 // Apply the appropriate language handler
|
|
|
1256 langHandlerForExtension(opt_langExtension, source)(job);
|
|
|
1257
|
|
|
1258 // Integrate the decorations and tags back into the source code,
|
|
|
1259 // modifying the sourceNode in place.
|
|
|
1260 recombineTagsAndDecorations(job);
|
|
|
1261 } catch (e) {
|
|
|
1262 if ('console' in window) {
|
|
|
1263 console['log'](e && e['stack'] ? e['stack'] : e);
|
|
|
1264 }
|
|
|
1265 }
|
|
|
1266 }
|
|
|
1267
|
|
|
1268 /**
|
|
|
1269 * @param sourceCodeHtml {string} The HTML to pretty print.
|
|
|
1270 * @param opt_langExtension {string} The language name to use.
|
|
|
1271 * Typically, a filename extension like 'cpp' or 'java'.
|
|
|
1272 * @param opt_numberLines {number|boolean} True to number lines,
|
|
|
1273 * or the 1-indexed number of the first line in sourceCodeHtml.
|
|
|
1274 */
|
|
|
1275 function prettyPrintOne(sourceCodeHtml, opt_langExtension, opt_numberLines) {
|
|
|
1276 var container = document.createElement('PRE');
|
|
|
1277 // This could cause images to load and onload listeners to fire.
|
|
|
1278 // E.g. <img onerror="alert(1337)" src="nosuchimage.png">.
|
|
|
1279 // We assume that the inner HTML is from a trusted source.
|
|
|
1280 container.innerHTML = sourceCodeHtml;
|
|
|
1281 if (opt_numberLines) {
|
|
|
1282 numberLines(container, opt_numberLines);
|
|
|
1283 }
|
|
|
1284
|
|
|
1285 var job = {
|
|
|
1286 langExtension: opt_langExtension,
|
|
|
1287 numberLines: opt_numberLines,
|
|
|
1288 sourceNode: container
|
|
|
1289 };
|
|
|
1290 applyDecorator(job);
|
|
|
1291 return container.innerHTML;
|
|
|
1292 }
|
|
|
1293
|
|
|
1294 function prettyPrint(opt_whenDone) {
|
|
|
1295 function byTagName(tn) { return document.getElementsByTagName(tn); }
|
|
|
1296 // fetch a list of nodes to rewrite
|
|
|
1297 var codeSegments = [byTagName('pre'), byTagName('code'), byTagName('xmp')];
|
|
|
1298 var elements = [];
|
|
|
1299 for (var i = 0; i < codeSegments.length; ++i) {
|
|
|
1300 for (var j = 0, n = codeSegments[i].length; j < n; ++j) {
|
|
|
1301 elements.push(codeSegments[i][j]);
|
|
|
1302 }
|
|
|
1303 }
|
|
|
1304 codeSegments = null;
|
|
|
1305
|
|
|
1306 var clock = Date;
|
|
|
1307 if (!clock['now']) {
|
|
|
1308 clock = { 'now': function () { return (new Date).getTime(); } };
|
|
|
1309 }
|
|
|
1310
|
|
|
1311 // The loop is broken into a series of continuations to make sure that we
|
|
|
1312 // don't make the browser unresponsive when rewriting a large page.
|
|
|
1313 var k = 0;
|
|
|
1314 var prettyPrintingJob;
|
|
|
1315
|
|
|
1316 function doWork() {
|
|
|
1317 var endTime = (window['PR_SHOULD_USE_CONTINUATION'] ?
|
|
|
1318 clock.now() + 250 /* ms */ :
|
|
|
1319 Infinity);
|
|
|
1320 for (; k < elements.length && clock.now() < endTime; k++) {
|
|
|
1321 var cs = elements[k];
|
|
|
1322 if (cs.className && cs.className.indexOf('prettyprint') >= 0) {
|
|
|
1323 // If the classes includes a language extensions, use it.
|
|
|
1324 // Language extensions can be specified like
|
|
|
1325 // <pre class="prettyprint lang-cpp">
|
|
|
1326 // the language extension "cpp" is used to find a language handler as
|
|
|
1327 // passed to PR.registerLangHandler.
|
|
|
1328 var langExtension = cs.className.match(/\blang-(\w+)\b/);
|
|
|
1329 if (langExtension) { langExtension = langExtension[1]; }
|
|
|
1330
|
|
|
1331 // make sure this is not nested in an already prettified element
|
|
|
1332 var nested = false;
|
|
|
1333 for (var p = cs.parentNode; p; p = p.parentNode) {
|
|
|
1334 if ((p.tagName === 'pre' || p.tagName === 'code' ||
|
|
|
1335 p.tagName === 'xmp') &&
|
|
|
1336 p.className && p.className.indexOf('prettyprint') >= 0) {
|
|
|
1337 nested = true;
|
|
|
1338 break;
|
|
|
1339 }
|
|
|
1340 }
|
|
|
1341 if (!nested) {
|
|
|
1342 // Look for a class like linenums or linenums:<n> where <n> is the
|
|
|
1343 // 1-indexed number of the first line.
|
|
|
1344 var lineNums = cs.className.match(/\blinenums\b(?::(\d+))?/);
|
|
|
1345 lineNums = lineNums
|
|
|
1346 ? lineNums[1] && lineNums[1].length ? +lineNums[1] : true
|
|
|
1347 : false;
|
|
|
1348 if (lineNums) { numberLines(cs, lineNums); }
|
|
|
1349
|
|
|
1350 // do the pretty printing
|
|
|
1351 prettyPrintingJob = {
|
|
|
1352 langExtension: langExtension,
|
|
|
1353 sourceNode: cs,
|
|
|
1354 numberLines: lineNums
|
|
|
1355 };
|
|
|
1356 applyDecorator(prettyPrintingJob);
|
|
|
1357 }
|
|
|
1358 }
|
|
|
1359 }
|
|
|
1360 if (k < elements.length) {
|
|
|
1361 // finish up in a continuation
|
|
|
1362 setTimeout(doWork, 250);
|
|
|
1363 } else if (opt_whenDone) {
|
|
|
1364 opt_whenDone();
|
|
|
1365 }
|
|
|
1366 }
|
|
|
1367
|
|
|
1368 doWork();
|
|
|
1369 }
|
|
|
1370
|
|
|
1371 window['prettyPrintOne'] = prettyPrintOne;
|
|
|
1372 window['prettyPrint'] = prettyPrint;
|
|
|
1373 window['PR'] = {
|
|
|
1374 'createSimpleLexer': createSimpleLexer,
|
|
|
1375 'registerLangHandler': registerLangHandler,
|
|
|
1376 'sourceDecorator': sourceDecorator,
|
|
|
1377 'PR_ATTRIB_NAME': PR_ATTRIB_NAME,
|
|
|
1378 'PR_ATTRIB_VALUE': PR_ATTRIB_VALUE,
|
|
|
1379 'PR_COMMENT': PR_COMMENT,
|
|
|
1380 'PR_DECLARATION': PR_DECLARATION,
|
|
|
1381 'PR_KEYWORD': PR_KEYWORD,
|
|
|
1382 'PR_LITERAL': PR_LITERAL,
|
|
|
1383 'PR_NOCODE': PR_NOCODE,
|
|
|
1384 'PR_PLAIN': PR_PLAIN,
|
|
|
1385 'PR_PUNCTUATION': PR_PUNCTUATION,
|
|
|
1386 'PR_SOURCE': PR_SOURCE,
|
|
|
1387 'PR_STRING': PR_STRING,
|
|
|
1388 'PR_TAG': PR_TAG,
|
|
|
1389 'PR_TYPE': PR_TYPE
|
|
|
1390 };
|
|
|
1391 })();
|
