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run_prettify.js
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run_prettify.js
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/**
* @license
* Copyright (C) 2013 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @fileoverview
* <div style="white-space: pre">
* Looks at query parameters to decide which language handlers and style-sheets
* to load.
*
* Query Parameter Format Effect Default
* +------------------+---------------+------------------------------+--------+
* | autorun= | true | false | If true then prettyPrint() | "true" |
* | | | is called on page load. | |
* +------------------+---------------+------------------------------+--------+
* | lang= | language name | Loads the language handler | Can |
* | | | named "lang-<NAME>.js". | appear |
* | | | See available handlers at | many |
* | | | https://github.com/google/ | times. |
* | | | code-prettify/tree/master/ | |
* | | | src | |
* +------------------+---------------+------------------------------+--------+
* | skin= | skin name | Loads the skin stylesheet | none. |
* | | | named "<NAME>.css". | |
* | | | https://raw.githack.com/ | |
* | | | google/code-prettify/master/ | |
* | | | styles/index.html | |
* +------------------+---------------+------------------------------+--------+
* | callback= | JS identifier | When "prettyPrint" finishes | none |
* | | | window.exports[js_ident] is | |
* | | | called. | |
* | | | The callback must be under | |
* | | | exports to reduce the risk | |
* | | | of XSS via query parameter | |
* | | | injection. | |
* +------------------+---------------+------------------------------+--------+
*
* Examples
* .../run_prettify.js?lang=css&skin=sunburst
* 1. Loads the CSS language handler which can be used to prettify CSS
* stylesheets, HTML <style> element bodies and style="..." attributes
* values.
* 2. Loads the sunburst.css stylesheet instead of the default prettify.css
* stylesheet.
* A gallery of stylesheets is available at
* https://raw.githack.com/google/code-prettify/master/styles/index.html
* 3. Since autorun=false is not specified, calls prettyPrint() on page load.
* </div>
*/
/**
* @typedef {!Array.<number|string>}
* Alternating indices and the decorations that should be inserted there.
* The indices are monotonically increasing.
*/
var DecorationsT;
/**
* @typedef {!{
* sourceNode: !Element,
* pre: !(number|boolean),
* langExtension: ?string,
* numberLines: ?(number|boolean),
* sourceCode: ?string,
* spans: ?(Array.<number|Node>),
* basePos: ?number,
* decorations: ?DecorationsT
* }}
* <dl>
* <dt>sourceNode<dd>the element containing the source
* <dt>sourceCode<dd>source as plain text
* <dt>pre<dd>truthy if white-space in text nodes
* should be considered significant.
* <dt>spans<dd> alternating span start indices into source
* and the text node or element (e.g. {@code <BR>}) corresponding to that
* span.
* <dt>decorations<dd>an array of style classes preceded
* by the position at which they start in job.sourceCode in order
* <dt>basePos<dd>integer position of this.sourceCode in the larger chunk of
* source.
* </dl>
*/
var JobT;
/**
* @typedef {!{
* sourceCode: string,
* spans: !(Array.<number|Node>)
* }}
* <dl>
* <dt>sourceCode<dd>source as plain text
* <dt>spans<dd> alternating span start indices into source
* and the text node or element (e.g. {@code <BR>}) corresponding to that
* span.
* </dl>
*/
var SourceSpansT;
/** @define {boolean} */
var IN_GLOBAL_SCOPE = false;
(function () {
"use strict";
var win = window;
var doc = document;
var root = doc.documentElement;
var head = doc['head'] || doc.getElementsByTagName("head")[0] || root;
// From http://javascript.nwbox.com/ContentLoaded/contentloaded.js
// Author: Diego Perini (diego.perini at gmail.com)
// Summary: cross-browser wrapper for DOMContentLoaded
// Updated: 20101020
// License: MIT
// Version: 1.2
function contentLoaded(callback) {
var addEventListener = doc['addEventListener'];
var done = false, top = true,
add = addEventListener ? 'addEventListener' : 'attachEvent',
rem = addEventListener ? 'removeEventListener' : 'detachEvent',
pre = addEventListener ? '' : 'on',
init = function(e) {
if (e.type == 'readystatechange' && doc.readyState != 'complete') {
return;
}
(e.type == 'load' ? win : doc)[rem](pre + e.type, init, false);
if (!done && (done = true)) { callback.call(win, e.type || e); }
},
poll = function() {
try {
root.doScroll('left');
} catch(e) {
win.setTimeout(poll, 50);
return;
}
init('poll');
};
if (doc.readyState == 'complete') {
callback.call(win, 'lazy');
} else {
if (doc.createEventObject && root.doScroll) {
try { top = !win.frameElement; } catch(e) { }
if (top) { poll(); }
}
doc[add](pre + 'DOMContentLoaded', init, false);
doc[add](pre + 'readystatechange', init, false);
win[add](pre + 'load', init, false);
}
}
// Given a list of URLs to stylesheets, loads the first that loads without
// triggering an error event.
function loadStylesheetsFallingBack(stylesheets) {
var n = stylesheets.length;
function load(i) {
if (i === n) { return; }
var link = doc.createElement('link');
link.rel = 'stylesheet';
link.type = 'text/css';
if (i + 1 < n) {
// http://pieisgood.org/test/script-link-events/ indicates that many
// versions of IE do not support onerror on <link>s, though
// http://msdn.microsoft.com/en-us/library/ie/ms535848(v=vs.85).aspx
// indicates that recent IEs do support error.
link.error = link.onerror = function () { load(i + 1); };
}
link.href = stylesheets[i];
head.appendChild(link);
}
load(0);
}
var scriptQuery = '';
// Look for the <script> node that loads this script to get its parameters.
// This starts looking at the end instead of just considering the last
// because deferred and async scripts run out of order.
// If the script is loaded twice, then this will run in reverse order.
var scripts = doc.getElementsByTagName('script');
for (var i = scripts.length; --i >= 0;) {
var script = scripts[i];
var match = script.src.match(
/^[^?#]*\/run_prettify\.js(\?[^#]*)?(?:#.*)?$/);
if (match) {
scriptQuery = match[1] || '';
// Remove the script from the DOM so that multiple runs at least run
// multiple times even if parameter sets are interpreted in reverse
// order.
script.parentNode.removeChild(script);
break;
}
}
// Pull parameters into local variables.
var autorun = true;
var langs = [];
var skins = [];
var callbacks = [];
scriptQuery.replace(
/[?&]([^&=]+)=([^&]+)/g,
function (_, name, value) {
value = decodeURIComponent(value);
name = decodeURIComponent(name);
if (name == 'autorun') { autorun = !/^[0fn]/i.test(value); } else
if (name == 'lang') { langs.push(value); } else
if (name == 'skin') { skins.push(value); } else
if (name == 'callback') { callbacks.push(value); }
});
// Use https to avoid mixed content warnings in client pages and to
// prevent a MITM from rewrite prettify mid-flight.
// This only works if this script is loaded via https : something
// over which we exercise no control.
var LOADER_BASE_URL =
'https://cdn.jsdelivr.net/gh/google/code-prettify@master/loader';
for (var i = 0, n = langs.length; i < n; ++i) (function (lang) {
var script = doc.createElement("script");
// Excerpted from jQuery.ajaxTransport("script") to fire events when
// a script is finished loading.
// Attach handlers for each script
script.onload = script.onerror = script.onreadystatechange = function () {
if (script && (
!script.readyState || /loaded|complete/.test(script.readyState))) {
// Handle memory leak in IE
script.onerror = script.onload = script.onreadystatechange = null;
--pendingLanguages;
checkPendingLanguages();
// Remove the script
if (script.parentNode) {
script.parentNode.removeChild(script);
}
script = null;
}
};
script.type = 'text/javascript';
script.src = LOADER_BASE_URL
+ '/lang-' + encodeURIComponent(langs[i]) + '.js';
// Circumvent IE6 bugs with base elements (#2709 and #4378) by prepending
head.insertBefore(script, head.firstChild);
})(langs[i]);
var pendingLanguages = langs.length;
function checkPendingLanguages() {
if (!pendingLanguages) {
win.setTimeout(onLangsLoaded, 0);
}
}
var skinUrls = [];
for (var i = 0, n = skins.length; i < n; ++i) {
skinUrls.push(LOADER_BASE_URL
+ '/skins/' + encodeURIComponent(skins[i]) + '.css');
}
skinUrls.push(LOADER_BASE_URL + '/prettify.css');
loadStylesheetsFallingBack(skinUrls);
var prettyPrint = (function () {
/**
* @license
* Copyright (C) 2006 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @fileoverview
* some functions for browser-side pretty printing of code contained in html.
*
* <p>
* For a fairly comprehensive set of languages see the
* <a href="https://github.com/google/code-prettify#for-which-languages-does-it-work">README</a>
* file that came with this source. At a minimum, the lexer should work on a
* number of languages including C and friends, Java, Python, Bash, SQL, HTML,
* XML, CSS, Javascript, and Makefiles. It works passably on Ruby, PHP and Awk
* and a subset of Perl, but, because of commenting conventions, doesn't work on
* Smalltalk, Lisp-like, or CAML-like languages without an explicit lang class.
* <p>
* Usage: <ol>
* <li> include this source file in an html page via
* {@code <script type="text/javascript" src="/path/to/prettify.js"></script>}
* <li> define style rules. See the example page for examples.
* <li> mark the {@code <pre>} and {@code <code>} tags in your source with
* {@code class=prettyprint.}
* You can also use the (html deprecated) {@code <xmp>} tag, but the pretty
* printer needs to do more substantial DOM manipulations to support that, so
* some css styles may not be preserved.
* </ol>
* That's it. I wanted to keep the API as simple as possible, so there's no
* need to specify which language the code is in, but if you wish, you can add
* another class to the {@code <pre>} or {@code <code>} element to specify the
* language, as in {@code <pre class="prettyprint lang-java">}. Any class that
* starts with "lang-" followed by a file extension, specifies the file type.
* See the "lang-*.js" files in this directory for code that implements
* per-language file handlers.
* <p>
* Change log:<br>
* cbeust, 2006/08/22
* <blockquote>
* Java annotations (start with "@") are now captured as literals ("lit")
* </blockquote>
* @requires console
*/
// JSLint declarations
/*global console, document, navigator, setTimeout, window, define */
/**
* {@type !{
* 'createSimpleLexer': function (Array, Array): (function (JobT)),
* 'registerLangHandler': function (function (JobT), Array.<string>),
* 'PR_ATTRIB_NAME': string,
* 'PR_ATTRIB_NAME': string,
* 'PR_ATTRIB_VALUE': string,
* 'PR_COMMENT': string,
* 'PR_DECLARATION': string,
* 'PR_KEYWORD': string,
* 'PR_LITERAL': string,
* 'PR_NOCODE': string,
* 'PR_PLAIN': string,
* 'PR_PUNCTUATION': string,
* 'PR_SOURCE': string,
* 'PR_STRING': string,
* 'PR_TAG': string,
* 'PR_TYPE': string,
* 'prettyPrintOne': function (string, string, number|boolean),
* 'prettyPrint': function (?function, ?(HTMLElement|HTMLDocument))
* }}
* @const
*/
var PR;
/**
* Split {@code prettyPrint} into multiple timeouts so as not to interfere with
* UI events.
* If set to {@code false}, {@code prettyPrint()} is synchronous.
*/
var PR_SHOULD_USE_CONTINUATION = true
if (typeof window !== 'undefined') {
window['PR_SHOULD_USE_CONTINUATION'] = PR_SHOULD_USE_CONTINUATION;
}
/**
* Pretty print a chunk of code.
* @param {string} sourceCodeHtml The HTML to pretty print.
* @param {string} opt_langExtension The language name to use.
* Typically, a filename extension like 'cpp' or 'java'.
* @param {number|boolean} opt_numberLines True to number lines,
* or the 1-indexed number of the first line in sourceCodeHtml.
* @return {string} code as html, but prettier
*/
var prettyPrintOne;
/**
* Find all the {@code <pre>} and {@code <code>} tags in the DOM with
* {@code class=prettyprint} and prettify them.
*
* @param {Function} opt_whenDone called when prettifying is done.
* @param {HTMLElement|HTMLDocument} opt_root an element or document
* containing all the elements to pretty print.
* Defaults to {@code document.body}.
*/
var prettyPrint;
(function () {
var win = (typeof window !== 'undefined') ? window : {};
// Keyword lists for various languages.
// We use things that coerce to strings to make them compact when minified
// and to defeat aggressive optimizers that fold large string constants.
var FLOW_CONTROL_KEYWORDS = ["break,continue,do,else,for,if,return,while"];
var C_KEYWORDS = [FLOW_CONTROL_KEYWORDS,"auto,case,char,const,default," +
"double,enum,extern,float,goto,inline,int,long,register,restrict,short,signed," +
"sizeof,static,struct,switch,typedef,union,unsigned,void,volatile"];
var COMMON_KEYWORDS = [C_KEYWORDS,"catch,class,delete,false,import," +
"new,operator,private,protected,public,this,throw,true,try,typeof"];
var CPP_KEYWORDS = [COMMON_KEYWORDS,"alignas,alignof,align_union,asm,axiom,bool," +
"concept,concept_map,const_cast,constexpr,decltype,delegate," +
"dynamic_cast,explicit,export,friend,generic,late_check," +
"mutable,namespace,noexcept,noreturn,nullptr,property,reinterpret_cast,static_assert," +
"static_cast,template,typeid,typename,using,virtual,where"];
var JAVA_KEYWORDS = [COMMON_KEYWORDS,
"abstract,assert,boolean,byte,extends,finally,final,implements,import," +
"instanceof,interface,null,native,package,strictfp,super,synchronized," +
"throws,transient"];
var CSHARP_KEYWORDS = [COMMON_KEYWORDS,
"abstract,add,alias,as,ascending,async,await,base,bool,by,byte,checked,decimal,delegate,descending," +
"dynamic,event,finally,fixed,foreach,from,get,global,group,implicit,in,interface," +
"internal,into,is,join,let,lock,null,object,out,override,orderby,params," +
"partial,readonly,ref,remove,sbyte,sealed,select,set,stackalloc,string,select,uint,ulong," +
"unchecked,unsafe,ushort,value,var,virtual,where,yield"];
var COFFEE_KEYWORDS = "all,and,by,catch,class,else,extends,false,finally," +
"for,if,in,is,isnt,loop,new,no,not,null,of,off,on,or,return,super,then," +
"throw,true,try,unless,until,when,while,yes";
var JSCRIPT_KEYWORDS = [COMMON_KEYWORDS,
"abstract,async,await,constructor,debugger,enum,eval,export,from,function," +
"get,import,implements,instanceof,interface,let,null,of,set,undefined," +
"var,with,yield,Infinity,NaN"];
var PERL_KEYWORDS = "caller,delete,die,do,dump,elsif,eval,exit,foreach,for," +
"goto,if,import,last,local,my,next,no,our,print,package,redo,require," +
"sub,undef,unless,until,use,wantarray,while,BEGIN,END";
var PYTHON_KEYWORDS = [FLOW_CONTROL_KEYWORDS, "and,as,assert,class,def,del," +
"elif,except,exec,finally,from,global,import,in,is,lambda," +
"nonlocal,not,or,pass,print,raise,try,with,yield," +
"False,True,None"];
var RUBY_KEYWORDS = [FLOW_CONTROL_KEYWORDS, "alias,and,begin,case,class," +
"def,defined,elsif,end,ensure,false,in,module,next,nil,not,or,redo," +
"rescue,retry,self,super,then,true,undef,unless,until,when,yield," +
"BEGIN,END"];
var SH_KEYWORDS = [FLOW_CONTROL_KEYWORDS, "case,done,elif,esac,eval,fi," +
"function,in,local,set,then,until"];
var ALL_KEYWORDS = [
CPP_KEYWORDS, CSHARP_KEYWORDS, JAVA_KEYWORDS, JSCRIPT_KEYWORDS,
PERL_KEYWORDS, PYTHON_KEYWORDS, RUBY_KEYWORDS, SH_KEYWORDS];
var C_TYPES = /^(DIR|FILE|array|vector|(de|priority_)?queue|(forward_)?list|stack|(const_)?(reverse_)?iterator|(unordered_)?(multi)?(set|map)|bitset|u?(int|float)\d*)\b/;
// token style names. correspond to css classes
/**
* token style for a string literal
* @const
*/
var PR_STRING = 'str';
/**
* token style for a keyword
* @const
*/
var PR_KEYWORD = 'kwd';
/**
* token style for a comment
* @const
*/
var PR_COMMENT = 'com';
/**
* token style for a type
* @const
*/
var PR_TYPE = 'typ';
/**
* token style for a literal value. e.g. 1, null, true.
* @const
*/
var PR_LITERAL = 'lit';
/**
* token style for a punctuation string.
* @const
*/
var PR_PUNCTUATION = 'pun';
/**
* token style for plain text.
* @const
*/
var PR_PLAIN = 'pln';
/**
* token style for an sgml tag.
* @const
*/
var PR_TAG = 'tag';
/**
* token style for a markup declaration such as a DOCTYPE.
* @const
*/
var PR_DECLARATION = 'dec';
/**
* token style for embedded source.
* @const
*/
var PR_SOURCE = 'src';
/**
* token style for an sgml attribute name.
* @const
*/
var PR_ATTRIB_NAME = 'atn';
/**
* token style for an sgml attribute value.
* @const
*/
var PR_ATTRIB_VALUE = 'atv';
/**
* A class that indicates a section of markup that is not code, e.g. to allow
* embedding of line numbers within code listings.
* @const
*/
var PR_NOCODE = 'nocode';
// Regex pattern below is automatically generated by regexpPrecederPatterns.pl
// Do not modify, your changes will be erased.
// CAVEAT: this does not properly handle the case where a regular
// expression immediately follows another since a regular expression may
// have flags for case-sensitivity and the like. Having regexp tokens
// adjacent is not valid in any language I'm aware of, so I'm punting.
// TODO: maybe style special characters inside a regexp as punctuation.
/**
* A set of tokens that can precede a regular expression literal in
* javascript
* http://web.archive.org/web/20070717142515/http://www.mozilla.org/js/language/js20/rationale/syntax.html
* has the full list, but I've removed ones that might be problematic when
* seen in languages that don't support regular expression literals.
*
* Specifically, I've removed any keywords that can't precede a regexp
* literal in a syntactically legal javascript program, and I've removed the
* "in" keyword since it's not a keyword in many languages, and might be used
* as a count of inches.
*
* The link above does not accurately describe EcmaScript rules since
* it fails to distinguish between (a=++/b/i) and (a++/b/i) but it works
* very well in practice.
*
* @private
* @const
*/
var REGEXP_PRECEDER_PATTERN = '(?:^^\\.?|[+-]|[!=]=?=?|\\#|%=?|&&?=?|\\(|\\*=?|[+\\-]=|->|\\/=?|::?|<<?=?|>>?>?=?|,|;|\\?|@|\\[|~|{|\\^\\^?=?|\\|\\|?=?|break|case|continue|delete|do|else|finally|instanceof|return|throw|try|typeof)\\s*';
/**
* Given a group of {@link RegExp}s, returns a {@code RegExp} that globally
* matches the union of the sets of strings matched by the input RegExp.
* Since it matches globally, if the input strings have a start-of-input
* anchor (/^.../), it is ignored for the purposes of unioning.
* @param {Array.<RegExp>} regexs non multiline, non-global regexs.
* @return {RegExp} a global regex.
*/
function combinePrefixPatterns(regexs) {
var capturedGroupIndex = 0;
var needToFoldCase = false;
var ignoreCase = false;
for (var i = 0, n = regexs.length; i < n; ++i) {
var regex = regexs[i];
if (regex.ignoreCase) {
ignoreCase = true;
} else if (/[a-z]/i.test(regex.source.replace(
/\\u[0-9a-f]{4}|\\x[0-9a-f]{2}|\\[^ux]/gi, ''))) {
needToFoldCase = true;
ignoreCase = false;
break;
}
}
var escapeCharToCodeUnit = {
'b': 8,
't': 9,
'n': 0xa,
'v': 0xb,
'f': 0xc,
'r': 0xd
};
function decodeEscape(charsetPart) {
var cc0 = charsetPart.charCodeAt(0);
if (cc0 !== 92 /* \\ */) {
return cc0;
}
var c1 = charsetPart.charAt(1);
cc0 = escapeCharToCodeUnit[c1];
if (cc0) {
return cc0;
} else if ('0' <= c1 && c1 <= '7') {
return parseInt(charsetPart.substring(1), 8);
} else if (c1 === 'u' || c1 === 'x') {
return parseInt(charsetPart.substring(2), 16);
} else {
return charsetPart.charCodeAt(1);
}
}
function encodeEscape(charCode) {
if (charCode < 0x20) {
return (charCode < 0x10 ? '\\x0' : '\\x') + charCode.toString(16);
}
var ch = String.fromCharCode(charCode);
return (ch === '\\' || ch === '-' || ch === ']' || ch === '^')
? "\\" + ch : ch;
}
function caseFoldCharset(charSet) {
var charsetParts = charSet.substring(1, charSet.length - 1).match(
new RegExp(
'\\\\u[0-9A-Fa-f]{4}'
+ '|\\\\x[0-9A-Fa-f]{2}'
+ '|\\\\[0-3][0-7]{0,2}'
+ '|\\\\[0-7]{1,2}'
+ '|\\\\[\\s\\S]'
+ '|-'
+ '|[^-\\\\]',
'g'));
var ranges = [];
var inverse = charsetParts[0] === '^';
var out = ['['];
if (inverse) { out.push('^'); }
for (var i = inverse ? 1 : 0, n = charsetParts.length; i < n; ++i) {
var p = charsetParts[i];
if (/\\[bdsw]/i.test(p)) { // Don't muck with named groups.
out.push(p);
} else {
var start = decodeEscape(p);
var end;
if (i + 2 < n && '-' === charsetParts[i + 1]) {
end = decodeEscape(charsetParts[i + 2]);
i += 2;
} else {
end = start;
}
ranges.push([start, end]);
// If the range might intersect letters, then expand it.
// This case handling is too simplistic.
// It does not deal with non-latin case folding.
// It works for latin source code identifiers though.
if (!(end < 65 || start > 122)) {
if (!(end < 65 || start > 90)) {
ranges.push([Math.max(65, start) | 32, Math.min(end, 90) | 32]);
}
if (!(end < 97 || start > 122)) {
ranges.push([Math.max(97, start) & ~32, Math.min(end, 122) & ~32]);
}
}
}
}
// [[1, 10], [3, 4], [8, 12], [14, 14], [16, 16], [17, 17]]
// -> [[1, 12], [14, 14], [16, 17]]
ranges.sort(function (a, b) { return (a[0] - b[0]) || (b[1] - a[1]); });
var consolidatedRanges = [];
var lastRange = [];
for (var i = 0; i < ranges.length; ++i) {
var range = ranges[i];
if (range[0] <= lastRange[1] + 1) {
lastRange[1] = Math.max(lastRange[1], range[1]);
} else {
consolidatedRanges.push(lastRange = range);
}
}
for (var i = 0; i < consolidatedRanges.length; ++i) {
var range = consolidatedRanges[i];
out.push(encodeEscape(range[0]));
if (range[1] > range[0]) {
if (range[1] + 1 > range[0]) { out.push('-'); }
out.push(encodeEscape(range[1]));
}
}
out.push(']');
return out.join('');
}
function allowAnywhereFoldCaseAndRenumberGroups(regex) {
// Split into character sets, escape sequences, punctuation strings
// like ('(', '(?:', ')', '^'), and runs of characters that do not
// include any of the above.
var parts = regex.source.match(
new RegExp(
'(?:'
+ '\\[(?:[^\\x5C\\x5D]|\\\\[\\s\\S])*\\]' // a character set
+ '|\\\\u[A-Fa-f0-9]{4}' // a unicode escape
+ '|\\\\x[A-Fa-f0-9]{2}' // a hex escape
+ '|\\\\[0-9]+' // a back-reference or octal escape
+ '|\\\\[^ux0-9]' // other escape sequence
+ '|\\(\\?[:!=]' // start of a non-capturing group
+ '|[\\(\\)\\^]' // start/end of a group, or line start
+ '|[^\\x5B\\x5C\\(\\)\\^]+' // run of other characters
+ ')',
'g'));
var n = parts.length;
// Maps captured group numbers to the number they will occupy in
// the output or to -1 if that has not been determined, or to
// undefined if they need not be capturing in the output.
var capturedGroups = [];
// Walk over and identify back references to build the capturedGroups
// mapping.
for (var i = 0, groupIndex = 0; i < n; ++i) {
var p = parts[i];
if (p === '(') {
// groups are 1-indexed, so max group index is count of '('
++groupIndex;
} else if ('\\' === p.charAt(0)) {
var decimalValue = +p.substring(1);
if (decimalValue) {
if (decimalValue <= groupIndex) {
capturedGroups[decimalValue] = -1;
} else {
// Replace with an unambiguous escape sequence so that
// an octal escape sequence does not turn into a backreference
// to a capturing group from an earlier regex.
parts[i] = encodeEscape(decimalValue);
}
}
}
}
// Renumber groups and reduce capturing groups to non-capturing groups
// where possible.
for (var i = 1; i < capturedGroups.length; ++i) {
if (-1 === capturedGroups[i]) {
capturedGroups[i] = ++capturedGroupIndex;
}
}
for (var i = 0, groupIndex = 0; i < n; ++i) {
var p = parts[i];
if (p === '(') {
++groupIndex;
if (!capturedGroups[groupIndex]) {
parts[i] = '(?:';
}
} else if ('\\' === p.charAt(0)) {
var decimalValue = +p.substring(1);
if (decimalValue && decimalValue <= groupIndex) {
parts[i] = '\\' + capturedGroups[decimalValue];
}
}
}
// Remove any prefix anchors so that the output will match anywhere.
// ^^ really does mean an anchored match though.
for (var i = 0; i < n; ++i) {
if ('^' === parts[i] && '^' !== parts[i + 1]) { parts[i] = ''; }
}
// Expand letters to groups to handle mixing of case-sensitive and
// case-insensitive patterns if necessary.
if (regex.ignoreCase && needToFoldCase) {
for (var i = 0; i < n; ++i) {
var p = parts[i];
var ch0 = p.charAt(0);
if (p.length >= 2 && ch0 === '[') {
parts[i] = caseFoldCharset(p);
} else if (ch0 !== '\\') {
// TODO: handle letters in numeric escapes.
parts[i] = p.replace(
/[a-zA-Z]/g,
function (ch) {
var cc = ch.charCodeAt(0);
return '[' + String.fromCharCode(cc & ~32, cc | 32) + ']';
});
}
}
}
return parts.join('');
}
var rewritten = [];
for (var i = 0, n = regexs.length; i < n; ++i) {
var regex = regexs[i];
if (regex.global || regex.multiline) { throw new Error('' + regex); }
rewritten.push(
'(?:' + allowAnywhereFoldCaseAndRenumberGroups(regex) + ')');
}
return new RegExp(rewritten.join('|'), ignoreCase ? 'gi' : 'g');
}
/**
* Split markup into a string of source code and an array mapping ranges in
* that string to the text nodes in which they appear.
*
* <p>
* The HTML DOM structure:</p>
* <pre>
* (Element "p"
* (Element "b"
* (Text "print ")) ; #1
* (Text "'Hello '") ; #2
* (Element "br") ; #3
* (Text " + 'World';")) ; #4
* </pre>
* <p>
* corresponds to the HTML
* {@code <p><b>print </b>'Hello '<br> + 'World';</p>}.</p>
*
* <p>
* It will produce the output:</p>
* <pre>
* {
* sourceCode: "print 'Hello '\n + 'World';",
* // 1 2
* // 012345678901234 5678901234567
* spans: [0, #1, 6, #2, 14, #3, 15, #4]
* }
* </pre>
* <p>
* where #1 is a reference to the {@code "print "} text node above, and so
* on for the other text nodes.
* </p>
*
* <p>
* The {@code} spans array is an array of pairs. Even elements are the start
* indices of substrings, and odd elements are the text nodes (or BR elements)
* that contain the text for those substrings.
* Substrings continue until the next index or the end of the source.
* </p>
*
* @param {Node} node an HTML DOM subtree containing source-code.
* @param {boolean|number} isPreformatted truthy if white-space in
* text nodes should be considered significant.
* @return {SourceSpansT} source code and the nodes in which they occur.
*/
function extractSourceSpans(node, isPreformatted) {
var nocode = /(?:^|\s)nocode(?:\s|$)/;
var chunks = [];
var length = 0;
var spans = [];
var k = 0;
function walk(node) {
var type = node.nodeType;
if (type == 1) { // Element
if (nocode.test(node.className)) { return; }
for (var child = node.firstChild; child; child = child.nextSibling) {
walk(child);
}
var nodeName = node.nodeName.toLowerCase();
if ('br' === nodeName || 'li' === nodeName) {
chunks[k] = '\n';
spans[k << 1] = length++;
spans[(k++ << 1) | 1] = node;
}
} else if (type == 3 || type == 4) { // Text
var text = node.nodeValue;
if (text.length) {
if (!isPreformatted) {
text = text.replace(/[ \t\r\n]+/g, ' ');
} else {
text = text.replace(/\r\n?/g, '\n'); // Normalize newlines.
}
// TODO: handle tabs here?
chunks[k] = text;
spans[k << 1] = length;
length += text.length;
spans[(k++ << 1) | 1] = node;
}
}
}
walk(node);
return {
sourceCode: chunks.join('').replace(/\n$/, ''),
spans: spans
};
}
/**
* Apply the given language handler to sourceCode and add the resulting
* decorations to out.
* @param {!Element} sourceNode
* @param {number} basePos the index of sourceCode within the chunk of source
* whose decorations are already present on out.
* @param {string} sourceCode
* @param {function(JobT)} langHandler
* @param {DecorationsT} out
*/
function appendDecorations(
sourceNode, basePos, sourceCode, langHandler, out) {
if (!sourceCode) { return; }
/** @type {JobT} */
var job = {
sourceNode: sourceNode,
pre: 1,
langExtension: null,
numberLines: null,
sourceCode: sourceCode,
spans: null,
basePos: basePos,
decorations: null
};
langHandler(job);
out.push.apply(out, job.decorations);
}
var notWs = /\S/;
/**
* Given an element, if it contains only one child element and any text nodes
* it contains contain only space characters, return the sole child element.
* Otherwise returns undefined.
* <p>
* This is meant to return the CODE element in {@code <pre><code ...>} when
* there is a single child element that contains all the non-space textual
* content, but not to return anything where there are multiple child elements
* as in {@code <pre><code>...</code><code>...</code></pre>} or when there
* is textual content.
*/
function childContentWrapper(element) {
var wrapper = undefined;
for (var c = element.firstChild; c; c = c.nextSibling) {
var type = c.nodeType;
wrapper = (type === 1) // Element Node
? (wrapper ? element : c)
: (type === 3) // Text Node
? (notWs.test(c.nodeValue) ? element : wrapper)
: wrapper;
}
return wrapper === element ? undefined : wrapper;
}
/** Given triples of [style, pattern, context] returns a lexing function,
* The lexing function interprets the patterns to find token boundaries and
* returns a decoration list of the form
* [index_0, style_0, index_1, style_1, ..., index_n, style_n]
* where index_n is an index into the sourceCode, and style_n is a style
* constant like PR_PLAIN. index_n-1 <= index_n, and style_n-1 applies to
* all characters in sourceCode[index_n-1:index_n].
*
* The stylePatterns is a list whose elements have the form
* [style : string, pattern : RegExp, DEPRECATED, shortcut : string].
*
* Style is a style constant like PR_PLAIN, or can be a string of the
* form 'lang-FOO', where FOO is a language extension describing the
* language of the portion of the token in $1 after pattern executes.
* E.g., if style is 'lang-lisp', and group 1 contains the text
* '(hello (world))', then that portion of the token will be passed to the
* registered lisp handler for formatting.
* The text before and after group 1 will be restyled using this decorator
* so decorators should take care that this doesn't result in infinite
* recursion. For example, the HTML lexer rule for SCRIPT elements looks
* something like ['lang-js', /<[s]cript>(.+?)<\/script>/]. This may match
* '<script>foo()<\/script>', which would cause the current decorator to
* be called with '<script>' which would not match the same rule since
* group 1 must not be empty, so it would be instead styled as PR_TAG by
* the generic tag rule. The handler registered for the 'js' extension would
* then be called with 'foo()', and finally, the current decorator would
* be called with '<\/script>' which would not match the original rule and
* so the generic tag rule would identify it as a tag.
*
* Pattern must only match prefixes, and if it matches a prefix, then that
* match is considered a token with the same style.
*
* Context is applied to the last non-whitespace, non-comment token
* recognized.
*
* Shortcut is an optional string of characters, any of which, if the first
* character, gurantee that this pattern and only this pattern matches.
*
* @param {Array} shortcutStylePatterns patterns that always start with
* a known character. Must have a shortcut string.
* @param {Array} fallthroughStylePatterns patterns that will be tried in
* order if the shortcut ones fail. May have shortcuts.
*
* @return {function (JobT)} a function that takes an undecorated job and
* attaches a list of decorations.
*/
function createSimpleLexer(shortcutStylePatterns, fallthroughStylePatterns) {
var shortcuts = {};
var tokenizer;
(function () {
var allPatterns = shortcutStylePatterns.concat(fallthroughStylePatterns);
var allRegexs = [];
var regexKeys = {};
for (var i = 0, n = allPatterns.length; i < n; ++i) {
var patternParts = allPatterns[i];
var shortcutChars = patternParts[3];
if (shortcutChars) {
for (var c = shortcutChars.length; --c >= 0;) {
shortcuts[shortcutChars.charAt(c)] = patternParts;
}
}
var regex = patternParts[1];