Mercurial > zeropaste
diff lib/assets/javascripts/prettify.js @ 58:33b47c2160a3
Use mainline prettify instead of stealing from bootstrap.
| author | Edho Arief <edho@myconan.net> |
|---|---|
| date | Thu, 04 Oct 2012 06:53:04 +0700 |
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| children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/lib/assets/javascripts/prettify.js Thu Oct 04 06:53:04 2012 +0700 @@ -0,0 +1,1477 @@ +// 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="http://google-code-prettify.googlecode.com/svn/trunk/README.html#langs">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 */ + +/** + * Split {@code prettyPrint} into multiple timeouts so as not to interfere with + * UI events. + * If set to {@code false}, {@code prettyPrint()} is synchronous. + */ +window['PR_SHOULD_USE_CONTINUATION'] = true; + +(function () { + // 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,int,long,register,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,"alignof,align_union,asm,axiom,bool," + + "concept,concept_map,const_cast,constexpr,decltype," + + "dynamic_cast,explicit,export,friend,inline,late_check," + + "mutable,namespace,nullptr,reinterpret_cast,static_assert,static_cast," + + "template,typeid,typename,using,virtual,where"]; + var JAVA_KEYWORDS = [COMMON_KEYWORDS, + "abstract,boolean,byte,extends,final,finally,implements,import," + + "instanceof,null,native,package,strictfp,super,synchronized,throws," + + "transient"]; + var CSHARP_KEYWORDS = [JAVA_KEYWORDS, + "as,base,by,checked,decimal,delegate,descending,dynamic,event," + + "fixed,foreach,from,group,implicit,in,interface,internal,into,is,lock," + + "object,out,override,orderby,params,partial,readonly,ref,sbyte,sealed," + + "stackalloc,string,select,uint,ulong,unchecked,unsafe,ushort,var"]; + 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," + + "true,try,unless,until,when,while,yes"; + var JSCRIPT_KEYWORDS = [COMMON_KEYWORDS, + "debugger,eval,export,function,get,null,set,undefined,var,with," + + "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, JSCRIPT_KEYWORDS, PERL_KEYWORDS + + PYTHON_KEYWORDS, RUBY_KEYWORDS, SH_KEYWORDS]; + var C_TYPES = /^(DIR|FILE|vector|(de|priority_)?queue|list|stack|(const_)?iterator|(multi)?(set|map)|bitset|u?(int|float)\d*)/; + + // 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 a punctuation string. + * @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'; + + + +/** + * 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. + * + * <p>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. + * + * <p>The link a 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*'; + +// 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. + + + /** + * 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); + if (ch === '\\' || ch === '-' || ch === '[' || ch === ']') { + ch = '\\' + ch; + } + return 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 groups = []; + var ranges = []; + var inverse = charsetParts[0] === '^'; + 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. + groups.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 = [NaN, NaN]; + 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); + } + } + + var out = ['[']; + if (inverse) { out.push('^'); } + out.push.apply(out, groups); + 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/emd 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 && decimalValue <= groupIndex) { + capturedGroups[decimalValue] = -1; + } + } + } + + // 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] === undefined) { + parts[i] = '(?:'; + } + } else if ('\\' === p.charAt(0)) { + var decimalValue = +p.substring(1); + if (decimalValue && decimalValue <= groupIndex) { + parts[i] = '\\' + capturedGroups[groupIndex]; + } + } + } + + // Remove any prefix anchors so that the output will match anywhere. + // ^^ really does mean an anchored match though. + for (var i = 0, groupIndex = 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. + * @return {Object} source code and the text nodes in which they occur. + */ + function extractSourceSpans(node) { + var nocode = /(?:^|\s)nocode(?:\s|$)/; + + var chunks = []; + var length = 0; + var spans = []; + var k = 0; + + var whitespace; + if (node.currentStyle) { + whitespace = node.currentStyle.whiteSpace; + } else if (window.getComputedStyle) { + whitespace = document.defaultView.getComputedStyle(node, null) + .getPropertyValue('white-space'); + } + var isPreformatted = whitespace && 'pre' === whitespace.substring(0, 3); + + function walk(node) { + switch (node.nodeType) { + case 1: // Element + if (nocode.test(node.className)) { return; } + for (var child = node.firstChild; child; child = child.nextSibling) { + walk(child); + } + var nodeName = node.nodeName; + if ('BR' === nodeName || 'LI' === nodeName) { + chunks[k] = '\n'; + spans[k << 1] = length++; + spans[(k++ << 1) | 1] = node; + } + break; + case 3: case 4: // Text + var text = node.nodeValue; + if (text.length) { + if (!isPreformatted) { + text = text.replace(/[ \t\r\n]+/g, ' '); + } else { + text = text.replace(/\r\n?/g, '\n'); // Normalize newlines. + } + // TODO: handle tabs here? + chunks[k] = text; + spans[k << 1] = length; + length += text.length; + spans[(k++ << 1) | 1] = node; + } + break; + } + } + + walk(node); + + return { + sourceCode: chunks.join('').replace(/\n$/, ''), + spans: spans + }; + } + + + /** + * Apply the given language handler to sourceCode and add the resulting + * decorations to out. + * @param {number} basePos the index of sourceCode within the chunk of source + * whose decorations are already present on out. + */ + function appendDecorations(basePos, sourceCode, langHandler, out) { + if (!sourceCode) { return; } + var job = { + sourceCode: sourceCode, + basePos: basePos + }; + 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 (Object)} a + * function that takes source code and returns 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]; + var k = '' + regex; + if (!regexKeys.hasOwnProperty(k)) { + allRegexs.push(regex); + regexKeys[k] = null; + } + } + allRegexs.push(/[\0-\uffff]/); + tokenizer = combinePrefixPatterns(allRegexs); + })(); + + var nPatterns = fallthroughStylePatterns.length; + + /** + * Lexes job.sourceCode and produces an output array job.decorations of + * style classes preceded by the position at which they start in + * job.sourceCode in order. + * + * @param {Object} job an object like <pre>{ + * sourceCode: {string} sourceText plain text, + * basePos: {int} position of job.sourceCode in the larger chunk of + * sourceCode. + * }</pre> + */ + var decorate = function (job) { + var sourceCode = job.sourceCode, basePos = job.basePos; + /** Even entries are positions in source in ascending order. Odd enties + * are style markers (e.g., PR_COMMENT) that run from that position until + * the end. + * @type {Array.<number|string>} + */ + var decorations = [basePos, PR_PLAIN]; + var pos = 0; // index into sourceCode + var tokens = sourceCode.match(tokenizer) || []; + var styleCache = {}; + + for (var ti = 0, nTokens = tokens.length; ti < nTokens; ++ti) { + var token = tokens[ti]; + var style = styleCache[token]; + var match = void 0; + + var isEmbedded; + if (typeof style === 'string') { + isEmbedded = false; + } else { + var patternParts = shortcuts[token.charAt(0)]; + if (patternParts) { + match = token.match(patternParts[1]); + style = patternParts[0]; + } else { + for (var i = 0; i < nPatterns; ++i) { + patternParts = fallthroughStylePatterns[i]; + match = token.match(patternParts[1]); + if (match) { + style = patternParts[0]; + break; + } + } + + if (!match) { // make sure that we make progress + style = PR_PLAIN; + } + } + + isEmbedded = style.length >= 5 && 'lang-' === style.substring(0, 5); + if (isEmbedded && !(match && typeof match[1] === 'string')) { + isEmbedded = false; + style = PR_SOURCE; + } + + if (!isEmbedded) { styleCache[token] = style; } + } + + var tokenStart = pos; + pos += token.length; + + if (!isEmbedded) { + decorations.push(basePos + tokenStart, style); + } else { // Treat group 1 as an embedded block of source code. + var embeddedSource = match[1]; + var embeddedSourceStart = token.indexOf(embeddedSource); + var embeddedSourceEnd = embeddedSourceStart + embeddedSource.length; + if (match[2]) { + // If embeddedSource can be blank, then it would match at the + // beginning which would cause us to infinitely recurse on the + // entire token, so we catch the right context in match[2]. + embeddedSourceEnd = token.length - match[2].length; + embeddedSourceStart = embeddedSourceEnd - embeddedSource.length; + } + var lang = style.substring(5); + // Decorate the left of the embedded source + appendDecorations( + basePos + tokenStart, + token.substring(0, embeddedSourceStart), + decorate, decorations); + // Decorate the embedded source + appendDecorations( + basePos + tokenStart + embeddedSourceStart, + embeddedSource, + langHandlerForExtension(lang, embeddedSource), + decorations); + // Decorate the right of the embedded section + appendDecorations( + basePos + tokenStart + embeddedSourceEnd, + token.substring(embeddedSourceEnd), + decorate, decorations); + } + } + job.decorations = decorations; + }; + return decorate; + } + + /** returns a function that produces a list of decorations from source text. + * + * This code treats ", ', and ` as string delimiters, and \ as a string + * escape. It does not recognize perl's qq() style strings. + * It has no special handling for double delimiter escapes as in basic, or + * the tripled delimiters used in python, but should work on those regardless + * although in those cases a single string literal may be broken up into + * multiple adjacent string literals. + * + * It recognizes C, C++, and shell style comments. + * + * @param {Object} options a set of optional parameters. + * @return {function (Object)} a function that examines the source code + * in the input job and builds the decoration list. + */ + function sourceDecorator(options) { + var shortcutStylePatterns = [], fallthroughStylePatterns = []; + if (options['tripleQuotedStrings']) { + // '''multi-line-string''', 'single-line-string', and double-quoted + shortcutStylePatterns.push( + [PR_STRING, /^(?:\'\'\'(?:[^\'\\]|\\[\s\S]|\'{1,2}(?=[^\']))*(?:\'\'\'|$)|\"\"\"(?:[^\"\\]|\\[\s\S]|\"{1,2}(?=[^\"]))*(?:\"\"\"|$)|\'(?:[^\\\']|\\[\s\S])*(?:\'|$)|\"(?:[^\\\"]|\\[\s\S])*(?:\"|$))/, + null, '\'"']); + } else if (options['multiLineStrings']) { + // 'multi-line-string', "multi-line-string" + shortcutStylePatterns.push( + [PR_STRING, /^(?:\'(?:[^\\\']|\\[\s\S])*(?:\'|$)|\"(?:[^\\\"]|\\[\s\S])*(?:\"|$)|\`(?:[^\\\`]|\\[\s\S])*(?:\`|$))/, + null, '\'"`']); + } else { + // 'single-line-string', "single-line-string" + shortcutStylePatterns.push( + [PR_STRING, + /^(?:\'(?:[^\\\'\r\n]|\\.)*(?:\'|$)|\"(?:[^\\\"\r\n]|\\.)*(?:\"|$))/, + null, '"\'']); + } + if (options['verbatimStrings']) { + // verbatim-string-literal production from the C# grammar. See issue 93. + fallthroughStylePatterns.push( + [PR_STRING, /^@\"(?:[^\"]|\"\")*(?:\"|$)/, null]); + } + var hc = options['hashComments']; + if (hc) { + if (options['cStyleComments']) { + if (hc > 1) { // multiline hash comments + shortcutStylePatterns.push( + [PR_COMMENT, /^#(?:##(?:[^#]|#(?!##))*(?:###|$)|.*)/, null, '#']); + } else { + // Stop C preprocessor declarations at an unclosed open comment + shortcutStylePatterns.push( + [PR_COMMENT, /^#(?:(?:define|elif|else|endif|error|ifdef|include|ifndef|line|pragma|undef|warning)\b|[^\r\n]*)/, + null, '#']); + } + fallthroughStylePatterns.push( + [PR_STRING, + /^<(?:(?:(?:\.\.\/)*|\/?)(?:[\w-]+(?:\/[\w-]+)+)?[\w-]+\.h|[a-z]\w*)>/, + null]); + } else { + shortcutStylePatterns.push([PR_COMMENT, /^#[^\r\n]*/, null, '#']); + } + } + if (options['cStyleComments']) { + fallthroughStylePatterns.push([PR_COMMENT, /^\/\/[^\r\n]*/, null]); + fallthroughStylePatterns.push( + [PR_COMMENT, /^\/\*[\s\S]*?(?:\*\/|$)/, null]); + } + if (options['regexLiterals']) { + /** + * @const + */ + var REGEX_LITERAL = ( + // A regular expression literal starts with a slash that is + // not followed by * or / so that it is not confused with + // comments. + '/(?=[^/*])' + // and then contains any number of raw characters, + + '(?:[^/\\x5B\\x5C]' + // escape sequences (\x5C), + + '|\\x5C[\\s\\S]' + // or non-nesting character sets (\x5B\x5D); + + '|\\x5B(?:[^\\x5C\\x5D]|\\x5C[\\s\\S])*(?:\\x5D|$))+' + // finally closed by a /. + + '/'); + fallthroughStylePatterns.push( + ['lang-regex', + new RegExp('^' + REGEXP_PRECEDER_PATTERN + '(' + REGEX_LITERAL + ')') + ]); + } + + var types = options['types']; + if (types) { + fallthroughStylePatterns.push([PR_TYPE, types]); + } + + var keywords = ("" + options['keywords']).replace(/^ | $/g, ''); + if (keywords.length) { + fallthroughStylePatterns.push( + [PR_KEYWORD, + new RegExp('^(?:' + keywords.replace(/[\s,]+/g, '|') + ')\\b'), + null]); + } + + shortcutStylePatterns.push([PR_PLAIN, /^\s+/, null, ' \r\n\t\xA0']); + fallthroughStylePatterns.push( + // TODO(mikesamuel): recognize non-latin letters and numerals in idents + [PR_LITERAL, /^@[a-z_$][a-z_$@0-9]*/i, null], + [PR_TYPE, /^(?:[@_]?[A-Z]+[a-z][A-Za-z_$@0-9]*|\w+_t\b)/, null], + [PR_PLAIN, /^[a-z_$][a-z_$@0-9]*/i, null], + [PR_LITERAL, + new RegExp( + '^(?:' + // A hex number + + '0x[a-f0-9]+' + // or an octal or decimal number, + + '|(?:\\d(?:_\\d+)*\\d*(?:\\.\\d*)?|\\.\\d\\+)' + // possibly in scientific notation + + '(?:e[+\\-]?\\d+)?' + + ')' + // with an optional modifier like UL for unsigned long + + '[a-z]*', 'i'), + null, '0123456789'], + // Don't treat escaped quotes in bash as starting strings. See issue 144. + [PR_PLAIN, /^\\[\s\S]?/, null], + [PR_PUNCTUATION, /^.[^\s\w\.$@\'\"\`\/\#\\]*/, null]); + + return createSimpleLexer(shortcutStylePatterns, fallthroughStylePatterns); + } + + var decorateSource = sourceDecorator({ + 'keywords': ALL_KEYWORDS, + 'hashComments': true, + 'cStyleComments': true, + 'multiLineStrings': true, + 'regexLiterals': true + }); + + /** + * Given a DOM subtree, wraps it in a list, and puts each line into its own + * list item. + * + * @param {Node} node modified in place. Its content is pulled into an + * HTMLOListElement, and each line is moved into a separate list item. + * This requires cloning elements, so the input might not have unique + * IDs after numbering. + */ + function numberLines(node, opt_startLineNum) { + var nocode = /(?:^|\s)nocode(?:\s|$)/; + var lineBreak = /\r\n?|\n/; + + var document = node.ownerDocument; + + var whitespace; + if (node.currentStyle) { + whitespace = node.currentStyle.whiteSpace; + } else if (window.getComputedStyle) { + whitespace = document.defaultView.getComputedStyle(node, null) + .getPropertyValue('white-space'); + } + // If it's preformatted, then we need to split lines on line breaks + // in addition to <BR>s. + var isPreformatted = whitespace && 'pre' === whitespace.substring(0, 3); + + var li = document.createElement('LI'); + while (node.firstChild) { + li.appendChild(node.firstChild); + } + // An array of lines. We split below, so this is initialized to one + // un-split line. + var listItems = [li]; + + function walk(node) { + switch (node.nodeType) { + case 1: // Element + if (nocode.test(node.className)) { break; } + if ('BR' === node.nodeName) { + breakAfter(node); + // Discard the <BR> since it is now flush against a </LI>. + if (node.parentNode) { + node.parentNode.removeChild(node); + } + } else { + for (var child = node.firstChild; child; child = child.nextSibling) { + walk(child); + } + } + break; + case 3: case 4: // Text + if (isPreformatted) { + var text = node.nodeValue; + var match = text.match(lineBreak); + if (match) { + var firstLine = text.substring(0, match.index); + node.nodeValue = firstLine; + var tail = text.substring(match.index + match[0].length); + if (tail) { + var parent = node.parentNode; + parent.insertBefore( + document.createTextNode(tail), node.nextSibling); + } + breakAfter(node); + if (!firstLine) { + // Don't leave blank text nodes in the DOM. + node.parentNode.removeChild(node); + } + } + } + break; + } + } + + // Split a line after the given node. + function breakAfter(lineEndNode) { + // If there's nothing to the right, then we can skip ending the line + // here, and move root-wards since splitting just before an end-tag + // would require us to create a bunch of empty copies. + while (!lineEndNode.nextSibling) { + lineEndNode = lineEndNode.parentNode; + if (!lineEndNode) { return; } + } + + function breakLeftOf(limit, copy) { + // Clone shallowly if this node needs to be on both sides of the break. + var rightSide = copy ? limit.cloneNode(false) : limit; + var parent = limit.parentNode; + if (parent) { + // We clone the parent chain. + // This helps us resurrect important styling elements that cross lines. + // E.g. in <i>Foo<br>Bar</i> + // should be rewritten to <li><i>Foo</i></li><li><i>Bar</i></li>. + var parentClone = breakLeftOf(parent, 1); + // Move the clone and everything to the right of the original + // onto the cloned parent. + var next = limit.nextSibling; + parentClone.appendChild(rightSide); + for (var sibling = next; sibling; sibling = next) { + next = sibling.nextSibling; + parentClone.appendChild(sibling); + } + } + return rightSide; + } + + var copiedListItem = breakLeftOf(lineEndNode.nextSibling, 0); + + // Walk the parent chain until we reach an unattached LI. + for (var parent; + // Check nodeType since IE invents document fragments. + (parent = copiedListItem.parentNode) && parent.nodeType === 1;) { + copiedListItem = parent; + } + // Put it on the list of lines for later processing. + listItems.push(copiedListItem); + } + + // Split lines while there are lines left to split. + for (var i = 0; // Number of lines that have been split so far. + i < listItems.length; // length updated by breakAfter calls. + ++i) { + walk(listItems[i]); + } + + // Make sure numeric indices show correctly. + if (opt_startLineNum === (opt_startLineNum|0)) { + listItems[0].setAttribute('value', opt_startLineNum); + } + + var ol = document.createElement('OL'); + ol.className = 'linenums'; + var offset = Math.max(0, ((opt_startLineNum - 1 /* zero index */)) | 0) || 0; + for (var i = 0, n = listItems.length; i < n; ++i) { + li = listItems[i]; + // Stick a class on the LIs so that stylesheets can + // color odd/even rows, or any other row pattern that + // is co-prime with 10. + li.className = 'L' + ((i + offset) % 10); + if (!li.firstChild) { + li.appendChild(document.createTextNode('\xA0')); + } + ol.appendChild(li); + } + + node.appendChild(ol); + } + + /** + * Breaks {@code job.sourceCode} around style boundaries in + * {@code job.decorations} and modifies {@code job.sourceNode} in place. + * @param {Object} job like <pre>{ + * sourceCode: {string} source as plain text, + * spans: {Array.<number|Node>} alternating span start indices into source + * and the text node or element (e.g. {@code <BR>}) corresponding to that + * span. + * decorations: {Array.<number|string} an array of style classes preceded + * by the position at which they start in job.sourceCode in order + * }</pre> + * @private + */ + function recombineTagsAndDecorations(job) { + var isIE = /\bMSIE\b/.test(navigator.userAgent); + var newlineRe = /\n/g; + + var source = job.sourceCode; + var sourceLength = source.length; + // Index into source after the last code-unit recombined. + var sourceIndex = 0; + + var spans = job.spans; + var nSpans = spans.length; + // Index into spans after the last span which ends at or before sourceIndex. + var spanIndex = 0; + + var decorations = job.decorations; + var nDecorations = decorations.length; + // Index into decorations after the last decoration which ends at or before + // sourceIndex. + var decorationIndex = 0; + + // Remove all zero-length decorations. + decorations[nDecorations] = sourceLength; + var decPos, i; + for (i = decPos = 0; i < nDecorations;) { + if (decorations[i] !== decorations[i + 2]) { + decorations[decPos++] = decorations[i++]; + decorations[decPos++] = decorations[i++]; + } else { + i += 2; + } + } + nDecorations = decPos; + + // Simplify decorations. + for (i = decPos = 0; i < nDecorations;) { + var startPos = decorations[i]; + // Conflate all adjacent decorations that use the same style. + var startDec = decorations[i + 1]; + var end = i + 2; + while (end + 2 <= nDecorations && decorations[end + 1] === startDec) { + end += 2; + } + decorations[decPos++] = startPos; + decorations[decPos++] = startDec; + i = end; + } + + nDecorations = decorations.length = decPos; + + var decoration = null; + while (spanIndex < nSpans) { + var spanStart = spans[spanIndex]; + var spanEnd = spans[spanIndex + 2] || sourceLength; + + var decStart = decorations[decorationIndex]; + var decEnd = decorations[decorationIndex + 2] || sourceLength; + + var end = Math.min(spanEnd, decEnd); + + var textNode = spans[spanIndex + 1]; + var styledText; + if (textNode.nodeType !== 1 // Don't muck with <BR>s or <LI>s + // Don't introduce spans around empty text nodes. + && (styledText = source.substring(sourceIndex, end))) { + // This may seem bizarre, and it is. Emitting LF on IE causes the + // code to display with spaces instead of line breaks. + // Emitting Windows standard issue linebreaks (CRLF) causes a blank + // space to appear at the beginning of every line but the first. + // Emitting an old Mac OS 9 line separator makes everything spiffy. + if (isIE) { styledText = styledText.replace(newlineRe, '\r'); } + textNode.nodeValue = styledText; + var document = textNode.ownerDocument; + var span = document.createElement('SPAN'); + span.className = decorations[decorationIndex + 1]; + var parentNode = textNode.parentNode; + parentNode.replaceChild(span, textNode); + span.appendChild(textNode); + if (sourceIndex < spanEnd) { // Split off a text node. + spans[spanIndex + 1] = textNode + // TODO: Possibly optimize by using '' if there's no flicker. + = document.createTextNode(source.substring(end, spanEnd)); + parentNode.insertBefore(textNode, span.nextSibling); + } + } + + sourceIndex = end; + + if (sourceIndex >= spanEnd) { + spanIndex += 2; + } + if (sourceIndex >= decEnd) { + decorationIndex += 2; + } + } + } + + + /** Maps language-specific file extensions to handlers. */ + var langHandlerRegistry = {}; + /** Register a language handler for the given file extensions. + * @param {function (Object)} handler a function from source code to a list + * of decorations. Takes a single argument job which describes the + * state of the computation. The single parameter has the form + * {@code { + * sourceCode: {string} as plain text. + * decorations: {Array.<number|string>} an array of style classes + * preceded by the position at which they start in + * job.sourceCode in order. + * The language handler should assigned this field. + * basePos: {int} the position of source in the larger source chunk. + * All positions in the output decorations array are relative + * to the larger source chunk. + * } } + * @param {Array.<string>} fileExtensions + */ + function registerLangHandler(handler, fileExtensions) { + for (var i = fileExtensions.length; --i >= 0;) { + var ext = fileExtensions[i]; + if (!langHandlerRegistry.hasOwnProperty(ext)) { + langHandlerRegistry[ext] = handler; + } else if (window['console']) { + console['warn']('cannot override language handler %s', ext); + } + } + } + function langHandlerForExtension(extension, source) { + if (!(extension && langHandlerRegistry.hasOwnProperty(extension))) { + // Treat it as markup if the first non whitespace character is a < and + // the last non-whitespace character is a >. + extension = /^\s*</.test(source) + ? 'default-markup' + : 'default-code'; + } + return langHandlerRegistry[extension]; + } + registerLangHandler(decorateSource, ['default-code']); + registerLangHandler( + createSimpleLexer( + [], + [ + [PR_PLAIN, /^[^<?]+/], + [PR_DECLARATION, /^<!\w[^>]*(?:>|$)/], + [PR_COMMENT, /^<\!--[\s\S]*?(?:-\->|$)/], + // Unescaped content in an unknown language + ['lang-', /^<\?([\s\S]+?)(?:\?>|$)/], + ['lang-', /^<%([\s\S]+?)(?:%>|$)/], + [PR_PUNCTUATION, /^(?:<[%?]|[%?]>)/], + ['lang-', /^<xmp\b[^>]*>([\s\S]+?)<\/xmp\b[^>]*>/i], + // Unescaped content in javascript. (Or possibly vbscript). + ['lang-js', /^<script\b[^>]*>([\s\S]*?)(<\/script\b[^>]*>)/i], + // Contains unescaped stylesheet content + ['lang-css', /^<style\b[^>]*>([\s\S]*?)(<\/style\b[^>]*>)/i], + ['lang-in.tag', /^(<\/?[a-z][^<>]*>)/i] + ]), + ['default-markup', 'htm', 'html', 'mxml', 'xhtml', 'xml', 'xsl']); + registerLangHandler( + createSimpleLexer( + [ + [PR_PLAIN, /^[\s]+/, null, ' \t\r\n'], + [PR_ATTRIB_VALUE, /^(?:\"[^\"]*\"?|\'[^\']*\'?)/, null, '\"\''] + ], + [ + [PR_TAG, /^^<\/?[a-z](?:[\w.:-]*\w)?|\/?>$/i], + [PR_ATTRIB_NAME, /^(?!style[\s=]|on)[a-z](?:[\w:-]*\w)?/i], + ['lang-uq.val', /^=\s*([^>\'\"\s]*(?:[^>\'\"\s\/]|\/(?=\s)))/], + [PR_PUNCTUATION, /^[=<>\/]+/], + ['lang-js', /^on\w+\s*=\s*\"([^\"]+)\"/i], + ['lang-js', /^on\w+\s*=\s*\'([^\']+)\'/i], + ['lang-js', /^on\w+\s*=\s*([^\"\'>\s]+)/i], + ['lang-css', /^style\s*=\s*\"([^\"]+)\"/i], + ['lang-css', /^style\s*=\s*\'([^\']+)\'/i], + ['lang-css', /^style\s*=\s*([^\"\'>\s]+)/i] + ]), + ['in.tag']); + registerLangHandler( + createSimpleLexer([], [[PR_ATTRIB_VALUE, /^[\s\S]+/]]), ['uq.val']); + registerLangHandler(sourceDecorator({ + 'keywords': CPP_KEYWORDS, + 'hashComments': true, + 'cStyleComments': true, + 'types': C_TYPES + }), ['c', 'cc', 'cpp', 'cxx', 'cyc', 'm']); + registerLangHandler(sourceDecorator({ + 'keywords': 'null,true,false' + }), ['json']); + registerLangHandler(sourceDecorator({ + 'keywords': CSHARP_KEYWORDS, + 'hashComments': true, + 'cStyleComments': true, + 'verbatimStrings': true, + 'types': C_TYPES + }), ['cs']); + registerLangHandler(sourceDecorator({ + 'keywords': JAVA_KEYWORDS, + 'cStyleComments': true + }), ['java']); + registerLangHandler(sourceDecorator({ + 'keywords': SH_KEYWORDS, + 'hashComments': true, + 'multiLineStrings': true + }), ['bsh', 'csh', 'sh']); + registerLangHandler(sourceDecorator({ + 'keywords': PYTHON_KEYWORDS, + 'hashComments': true, + 'multiLineStrings': true, + 'tripleQuotedStrings': true + }), ['cv', 'py']); + registerLangHandler(sourceDecorator({ + 'keywords': PERL_KEYWORDS, + 'hashComments': true, + 'multiLineStrings': true, + 'regexLiterals': true + }), ['perl', 'pl', 'pm']); + registerLangHandler(sourceDecorator({ + 'keywords': RUBY_KEYWORDS, + 'hashComments': true, + 'multiLineStrings': true, + 'regexLiterals': true + }), ['rb']); + registerLangHandler(sourceDecorator({ + 'keywords': JSCRIPT_KEYWORDS, + 'cStyleComments': true, + 'regexLiterals': true + }), ['js']); + registerLangHandler(sourceDecorator({ + 'keywords': COFFEE_KEYWORDS, + 'hashComments': 3, // ### style block comments + 'cStyleComments': true, + 'multilineStrings': true, + 'tripleQuotedStrings': true, + 'regexLiterals': true + }), ['coffee']); + registerLangHandler(createSimpleLexer([], [[PR_STRING, /^[\s\S]+/]]), ['regex']); + + function applyDecorator(job) { + var opt_langExtension = job.langExtension; + + try { + // Extract tags, and convert the source code to plain text. + var sourceAndSpans = extractSourceSpans(job.sourceNode); + /** Plain text. @type {string} */ + var source = sourceAndSpans.sourceCode; + job.sourceCode = source; + job.spans = sourceAndSpans.spans; + job.basePos = 0; + + // Apply the appropriate language handler + langHandlerForExtension(opt_langExtension, source)(job); + + // Integrate the decorations and tags back into the source code, + // modifying the sourceNode in place. + recombineTagsAndDecorations(job); + } catch (e) { + if ('console' in window) { + console['log'](e && e['stack'] ? e['stack'] : e); + } + } + } + + /** + * @param sourceCodeHtml {string} The HTML to pretty print. + * @param opt_langExtension {string} The language name to use. + * Typically, a filename extension like 'cpp' or 'java'. + * @param opt_numberLines {number|boolean} True to number lines, + * or the 1-indexed number of the first line in sourceCodeHtml. + */ + function prettyPrintOne(sourceCodeHtml, opt_langExtension, opt_numberLines) { + var container = document.createElement('PRE'); + // This could cause images to load and onload listeners to fire. + // E.g. <img onerror="alert(1337)" src="nosuchimage.png">. + // We assume that the inner HTML is from a trusted source. + container.innerHTML = sourceCodeHtml; + if (opt_numberLines) { + numberLines(container, opt_numberLines); + } + + var job = { + langExtension: opt_langExtension, + numberLines: opt_numberLines, + sourceNode: container + }; + applyDecorator(job); + return container.innerHTML; + } + + function prettyPrint(opt_whenDone) { + function byTagName(tn) { return document.getElementsByTagName(tn); } + // fetch a list of nodes to rewrite + var codeSegments = [byTagName('pre'), byTagName('code'), byTagName('xmp')]; + var elements = []; + for (var i = 0; i < codeSegments.length; ++i) { + for (var j = 0, n = codeSegments[i].length; j < n; ++j) { + elements.push(codeSegments[i][j]); + } + } + codeSegments = null; + + var clock = Date; + if (!clock['now']) { + clock = { 'now': function () { return +(new Date); } }; + } + + // The loop is broken into a series of continuations to make sure that we + // don't make the browser unresponsive when rewriting a large page. + var k = 0; + var prettyPrintingJob; + + var langExtensionRe = /\blang(?:uage)?-([\w.]+)(?!\S)/; + var prettyPrintRe = /\bprettyprint\b/; + + function doWork() { + var endTime = (window['PR_SHOULD_USE_CONTINUATION'] ? + clock['now']() + 250 /* ms */ : + Infinity); + for (; k < elements.length && clock['now']() < endTime; k++) { + var cs = elements[k]; + var className = cs.className; + if (className.indexOf('prettyprint') >= 0) { + // If the classes includes a language extensions, use it. + // Language extensions can be specified like + // <pre class="prettyprint lang-cpp"> + // the language extension "cpp" is used to find a language handler as + // passed to PR.registerLangHandler. + // HTML5 recommends that a language be specified using "language-" + // as the prefix instead. Google Code Prettify supports both. + // http://dev.w3.org/html5/spec-author-view/the-code-element.html + var langExtension = className.match(langExtensionRe); + // Support <pre class="prettyprint"><code class="language-c"> + var wrapper; + if (!langExtension && (wrapper = childContentWrapper(cs)) + && "CODE" === wrapper.tagName) { + langExtension = wrapper.className.match(langExtensionRe); + } + + if (langExtension) { + langExtension = langExtension[1]; + } + + // make sure this is not nested in an already prettified element + var nested = false; + for (var p = cs.parentNode; p; p = p.parentNode) { + if ((p.tagName === 'pre' || p.tagName === 'code' || + p.tagName === 'xmp') && + p.className && p.className.indexOf('prettyprint') >= 0) { + nested = true; + break; + } + } + if (!nested) { + // Look for a class like linenums or linenums:<n> where <n> is the + // 1-indexed number of the first line. + var lineNums = cs.className.match(/\blinenums\b(?::(\d+))?/); + lineNums = lineNums + ? lineNums[1] && lineNums[1].length ? +lineNums[1] : true + : false; + if (lineNums) { numberLines(cs, lineNums); } + + // do the pretty printing + prettyPrintingJob = { + langExtension: langExtension, + sourceNode: cs, + numberLines: lineNums + }; + applyDecorator(prettyPrintingJob); + } + } + } + if (k < elements.length) { + // finish up in a continuation + setTimeout(doWork, 250); + } else if (opt_whenDone) { + opt_whenDone(); + } + } + + doWork(); + } + + /** + * Find all the {@code <pre>} and {@code <code>} tags in the DOM with + * {@code class=prettyprint} and prettify them. + * + * @param {Function?} opt_whenDone if specified, called when the last entry + * has been finished. + */ + window['prettyPrintOne'] = prettyPrintOne; + /** + * Pretty print a chunk of code. + * + * @param {string} sourceCodeHtml code as html + * @return {string} code as html, but prettier + */ + window['prettyPrint'] = prettyPrint; + /** + * Contains functions for creating and registering new language handlers. + * @type {Object} + */ + window['PR'] = { + 'createSimpleLexer': createSimpleLexer, + 'registerLangHandler': registerLangHandler, + 'sourceDecorator': sourceDecorator, + 'PR_ATTRIB_NAME': PR_ATTRIB_NAME, + 'PR_ATTRIB_VALUE': PR_ATTRIB_VALUE, + 'PR_COMMENT': PR_COMMENT, + 'PR_DECLARATION': PR_DECLARATION, + 'PR_KEYWORD': PR_KEYWORD, + 'PR_LITERAL': PR_LITERAL, + 'PR_NOCODE': PR_NOCODE, + 'PR_PLAIN': PR_PLAIN, + 'PR_PUNCTUATION': PR_PUNCTUATION, + 'PR_SOURCE': PR_SOURCE, + 'PR_STRING': PR_STRING, + 'PR_TAG': PR_TAG, + 'PR_TYPE': PR_TYPE + }; +})();