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1656 lines
62 KiB
1656 lines
62 KiB
// Copyright (C) 2006 Google Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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/**
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* @fileoverview
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* some functions for browser-side pretty printing of code contained in html.
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*
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* <p>
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* For a fairly comprehensive set of languages see the
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* <a href="http://google-code-prettify.googlecode.com/svn/trunk/README.html#langs">README</a>
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* file that came with this source. At a minimum, the lexer should work on a
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* number of languages including C and friends, Java, Python, Bash, SQL, HTML,
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* XML, CSS, Javascript, and Makefiles. It works passably on Ruby, PHP and Awk
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* and a subset of Perl, but, because of commenting conventions, doesn't work on
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* Smalltalk, Lisp-like, or CAML-like languages without an explicit lang class.
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* <p>
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* Usage: <ol>
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* <li> include this source file in an html page via
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* {@code <script type="text/javascript" src="/path/to/prettify.js"></script>}
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* <li> define style rules. See the example page for examples.
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* <li> mark the {@code <pre>} and {@code <code>} tags in your source with
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* {@code class=prettyprint.}
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* You can also use the (html deprecated) {@code <xmp>} tag, but the pretty
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* printer needs to do more substantial DOM manipulations to support that, so
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* some css styles may not be preserved.
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* </ol>
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* That's it. I wanted to keep the API as simple as possible, so there's no
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* need to specify which language the code is in, but if you wish, you can add
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* another class to the {@code <pre>} or {@code <code>} element to specify the
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* language, as in {@code <pre class="prettyprint lang-java">}. Any class that
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* starts with "lang-" followed by a file extension, specifies the file type.
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* See the "lang-*.js" files in this directory for code that implements
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* per-language file handlers.
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* <p>
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* Change log:<br>
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* cbeust, 2006/08/22
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* <blockquote>
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* Java annotations (start with "@") are now captured as literals ("lit")
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* </blockquote>
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* @requires console
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*/
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// JSLint declarations
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/*global console, document, navigator, setTimeout, window, define */
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/** @define {boolean} */
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var IN_GLOBAL_SCOPE = true;
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/**
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* Split {@code prettyPrint} into multiple timeouts so as not to interfere with
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* UI events.
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* If set to {@code false}, {@code prettyPrint()} is synchronous.
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*/
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window['PR_SHOULD_USE_CONTINUATION'] = true;
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/**
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* Pretty print a chunk of code.
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* @param {string} sourceCodeHtml The HTML to pretty print.
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* @param {string} opt_langExtension The language name to use.
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* Typically, a filename extension like 'cpp' or 'java'.
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* @param {number|boolean} opt_numberLines True to number lines,
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* or the 1-indexed number of the first line in sourceCodeHtml.
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* @return {string} code as html, but prettier
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*/
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var prettyPrintOne;
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/**
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* Find all the {@code <pre>} and {@code <code>} tags in the DOM with
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* {@code class=prettyprint} and prettify them.
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*
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* @param {Function} opt_whenDone called when prettifying is done.
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* @param {HTMLElement|HTMLDocument} opt_root an element or document
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* containing all the elements to pretty print.
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* Defaults to {@code document.body}.
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*/
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var prettyPrint;
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(function () {
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var win = window;
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// Keyword lists for various languages.
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// We use things that coerce to strings to make them compact when minified
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// and to defeat aggressive optimizers that fold large string constants.
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var FLOW_CONTROL_KEYWORDS = ["break,continue,do,else,for,if,return,while"];
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var C_KEYWORDS = [FLOW_CONTROL_KEYWORDS,"auto,case,char,const,default," +
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"double,enum,extern,float,goto,inline,int,long,register,short,signed," +
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"sizeof,static,struct,switch,typedef,union,unsigned,void,volatile"];
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var COMMON_KEYWORDS = [C_KEYWORDS,"catch,class,delete,false,import," +
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"new,operator,private,protected,public,this,throw,true,try,typeof"];
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var CPP_KEYWORDS = [COMMON_KEYWORDS,"alignof,align_union,asm,axiom,bool," +
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"concept,concept_map,const_cast,constexpr,decltype,delegate," +
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"dynamic_cast,explicit,export,friend,generic,late_check," +
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"mutable,namespace,nullptr,property,reinterpret_cast,static_assert," +
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"static_cast,template,typeid,typename,using,virtual,where"];
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var JAVA_KEYWORDS = [COMMON_KEYWORDS,
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"abstract,assert,boolean,byte,extends,final,finally,implements,import," +
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"instanceof,interface,null,native,package,strictfp,super,synchronized," +
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"throws,transient"];
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var CSHARP_KEYWORDS = [JAVA_KEYWORDS,
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"as,base,by,checked,decimal,delegate,descending,dynamic,event," +
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"fixed,foreach,from,group,implicit,in,internal,into,is,let," +
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"lock,object,out,override,orderby,params,partial,readonly,ref,sbyte," +
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"sealed,stackalloc,string,select,uint,ulong,unchecked,unsafe,ushort," +
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"var,virtual,where"];
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var COFFEE_KEYWORDS = "all,and,by,catch,class,else,extends,false,finally," +
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"for,if,in,is,isnt,loop,new,no,not,null,of,off,on,or,return,super,then," +
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"throw,true,try,unless,until,when,while,yes";
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var JSCRIPT_KEYWORDS = [COMMON_KEYWORDS,
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"debugger,eval,export,function,get,null,set,undefined,var,with," +
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"Infinity,NaN"];
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var PERL_KEYWORDS = "caller,delete,die,do,dump,elsif,eval,exit,foreach,for," +
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"goto,if,import,last,local,my,next,no,our,print,package,redo,require," +
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"sub,undef,unless,until,use,wantarray,while,BEGIN,END";
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var PYTHON_KEYWORDS = [FLOW_CONTROL_KEYWORDS, "and,as,assert,class,def,del," +
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"elif,except,exec,finally,from,global,import,in,is,lambda," +
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"nonlocal,not,or,pass,print,raise,try,with,yield," +
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"False,True,None"];
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var RUBY_KEYWORDS = [FLOW_CONTROL_KEYWORDS, "alias,and,begin,case,class," +
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"def,defined,elsif,end,ensure,false,in,module,next,nil,not,or,redo," +
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"rescue,retry,self,super,then,true,undef,unless,until,when,yield," +
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"BEGIN,END"];
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var RUST_KEYWORDS = [FLOW_CONTROL_KEYWORDS, "as,assert,const,copy,drop," +
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"enum,extern,fail,false,fn,impl,let,log,loop,match,mod,move,mut,priv," +
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"pub,pure,ref,self,static,struct,true,trait,type,unsafe,use"];
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var SH_KEYWORDS = [FLOW_CONTROL_KEYWORDS, "case,done,elif,esac,eval,fi," +
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"function,in,local,set,then,until"];
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var ALL_KEYWORDS = [
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CPP_KEYWORDS, CSHARP_KEYWORDS, JSCRIPT_KEYWORDS, PERL_KEYWORDS,
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PYTHON_KEYWORDS, RUBY_KEYWORDS, SH_KEYWORDS];
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var C_TYPES = /^(DIR|FILE|vector|(de|priority_)?queue|list|stack|(const_)?iterator|(multi)?(set|map)|bitset|u?(int|float)\d*)\b/;
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// token style names. correspond to css classes
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/**
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* token style for a string literal
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* @const
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*/
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var PR_STRING = 'str';
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/**
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* token style for a keyword
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* @const
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*/
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var PR_KEYWORD = 'kwd';
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/**
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* token style for a comment
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* @const
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*/
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var PR_COMMENT = 'com';
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/**
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* token style for a type
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* @const
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*/
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var PR_TYPE = 'typ';
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/**
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* token style for a literal value. e.g. 1, null, true.
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* @const
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*/
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var PR_LITERAL = 'lit';
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/**
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* token style for a punctuation string.
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* @const
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*/
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var PR_PUNCTUATION = 'pun';
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/**
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* token style for plain text.
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* @const
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*/
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var PR_PLAIN = 'pln';
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/**
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* token style for an sgml tag.
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* @const
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*/
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var PR_TAG = 'tag';
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/**
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* token style for a markup declaration such as a DOCTYPE.
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* @const
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*/
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var PR_DECLARATION = 'dec';
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/**
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* token style for embedded source.
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* @const
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*/
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var PR_SOURCE = 'src';
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/**
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* token style for an sgml attribute name.
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* @const
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*/
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var PR_ATTRIB_NAME = 'atn';
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/**
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* token style for an sgml attribute value.
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* @const
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*/
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var PR_ATTRIB_VALUE = 'atv';
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/**
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* A class that indicates a section of markup that is not code, e.g. to allow
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* embedding of line numbers within code listings.
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* @const
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*/
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var PR_NOCODE = 'nocode';
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/**
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* A set of tokens that can precede a regular expression literal in
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* javascript
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* http://web.archive.org/web/20070717142515/http://www.mozilla.org/js/language/js20/rationale/syntax.html
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* has the full list, but I've removed ones that might be problematic when
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* seen in languages that don't support regular expression literals.
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*
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* <p>Specifically, I've removed any keywords that can't precede a regexp
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* literal in a syntactically legal javascript program, and I've removed the
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* "in" keyword since it's not a keyword in many languages, and might be used
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* as a count of inches.
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*
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* <p>The link above does not accurately describe EcmaScript rules since
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* it fails to distinguish between (a=++/b/i) and (a++/b/i) but it works
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* very well in practice.
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*
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* @private
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* @const
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*/
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var REGEXP_PRECEDER_PATTERN = '(?:^^\\.?|[+-]|[!=]=?=?|\\#|%=?|&&?=?|\\(|\\*=?|[+\\-]=|->|\\/=?|::?|<<?=?|>>?>?=?|,|;|\\?|@|\\[|~|{|\\^\\^?=?|\\|\\|?=?|break|case|continue|delete|do|else|finally|instanceof|return|throw|try|typeof)\\s*';
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// CAVEAT: this does not properly handle the case where a regular
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// expression immediately follows another since a regular expression may
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// have flags for case-sensitivity and the like. Having regexp tokens
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// adjacent is not valid in any language I'm aware of, so I'm punting.
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// TODO: maybe style special characters inside a regexp as punctuation.
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/**
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* Given a group of {@link RegExp}s, returns a {@code RegExp} that globally
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* matches the union of the sets of strings matched by the input RegExp.
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* Since it matches globally, if the input strings have a start-of-input
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* anchor (/^.../), it is ignored for the purposes of unioning.
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* @param {Array.<RegExp>} regexs non multiline, non-global regexs.
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* @return {RegExp} a global regex.
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*/
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function combinePrefixPatterns(regexs) {
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var capturedGroupIndex = 0;
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var needToFoldCase = false;
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var ignoreCase = false;
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for (var i = 0, n = regexs.length; i < n; ++i) {
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var regex = regexs[i];
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if (regex.ignoreCase) {
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ignoreCase = true;
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} else if (/[a-z]/i.test(regex.source.replace(
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/\\u[0-9a-f]{4}|\\x[0-9a-f]{2}|\\[^ux]/gi, ''))) {
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needToFoldCase = true;
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ignoreCase = false;
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break;
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}
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}
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var escapeCharToCodeUnit = {
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'b': 8,
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't': 9,
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'n': 0xa,
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'v': 0xb,
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'f': 0xc,
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'r': 0xd
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};
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function decodeEscape(charsetPart) {
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var cc0 = charsetPart.charCodeAt(0);
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if (cc0 !== 92 /* \\ */) {
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return cc0;
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}
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var c1 = charsetPart.charAt(1);
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cc0 = escapeCharToCodeUnit[c1];
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if (cc0) {
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return cc0;
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} else if ('0' <= c1 && c1 <= '7') {
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return parseInt(charsetPart.substring(1), 8);
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} else if (c1 === 'u' || c1 === 'x') {
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return parseInt(charsetPart.substring(2), 16);
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} else {
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return charsetPart.charCodeAt(1);
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}
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}
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function encodeEscape(charCode) {
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if (charCode < 0x20) {
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return (charCode < 0x10 ? '\\x0' : '\\x') + charCode.toString(16);
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}
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var ch = String.fromCharCode(charCode);
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return (ch === '\\' || ch === '-' || ch === ']' || ch === '^')
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? "\\" + ch : ch;
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}
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function caseFoldCharset(charSet) {
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var charsetParts = charSet.substring(1, charSet.length - 1).match(
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new RegExp(
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'\\\\u[0-9A-Fa-f]{4}'
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+ '|\\\\x[0-9A-Fa-f]{2}'
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+ '|\\\\[0-3][0-7]{0,2}'
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+ '|\\\\[0-7]{1,2}'
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+ '|\\\\[\\s\\S]'
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+ '|-'
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+ '|[^-\\\\]',
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'g'));
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var ranges = [];
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var inverse = charsetParts[0] === '^';
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var out = ['['];
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if (inverse) { out.push('^'); }
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for (var i = inverse ? 1 : 0, n = charsetParts.length; i < n; ++i) {
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var p = charsetParts[i];
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if (/\\[bdsw]/i.test(p)) { // Don't muck with named groups.
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out.push(p);
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} else {
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var start = decodeEscape(p);
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var end;
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if (i + 2 < n && '-' === charsetParts[i + 1]) {
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end = decodeEscape(charsetParts[i + 2]);
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i += 2;
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} else {
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end = start;
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}
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ranges.push([start, end]);
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// If the range might intersect letters, then expand it.
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// This case handling is too simplistic.
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// It does not deal with non-latin case folding.
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// It works for latin source code identifiers though.
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if (!(end < 65 || start > 122)) {
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if (!(end < 65 || start > 90)) {
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ranges.push([Math.max(65, start) | 32, Math.min(end, 90) | 32]);
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}
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if (!(end < 97 || start > 122)) {
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ranges.push([Math.max(97, start) & ~32, Math.min(end, 122) & ~32]);
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}
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}
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}
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}
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// [[1, 10], [3, 4], [8, 12], [14, 14], [16, 16], [17, 17]]
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// -> [[1, 12], [14, 14], [16, 17]]
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ranges.sort(function (a, b) { return (a[0] - b[0]) || (b[1] - a[1]); });
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var consolidatedRanges = [];
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var lastRange = [];
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for (var i = 0; i < ranges.length; ++i) {
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var range = ranges[i];
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if (range[0] <= lastRange[1] + 1) {
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lastRange[1] = Math.max(lastRange[1], range[1]);
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} else {
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consolidatedRanges.push(lastRange = range);
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}
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}
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for (var i = 0; i < consolidatedRanges.length; ++i) {
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var range = consolidatedRanges[i];
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out.push(encodeEscape(range[0]));
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if (range[1] > range[0]) {
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if (range[1] + 1 > range[0]) { out.push('-'); }
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out.push(encodeEscape(range[1]));
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}
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}
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out.push(']');
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return out.join('');
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}
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function allowAnywhereFoldCaseAndRenumberGroups(regex) {
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// Split into character sets, escape sequences, punctuation strings
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// like ('(', '(?:', ')', '^'), and runs of characters that do not
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// include any of the above.
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var parts = regex.source.match(
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new RegExp(
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'(?:'
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+ '\\[(?:[^\\x5C\\x5D]|\\\\[\\s\\S])*\\]' // a character set
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+ '|\\\\u[A-Fa-f0-9]{4}' // a unicode escape
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+ '|\\\\x[A-Fa-f0-9]{2}' // a hex escape
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+ '|\\\\[0-9]+' // a back-reference or octal escape
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+ '|\\\\[^ux0-9]' // other escape sequence
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+ '|\\(\\?[:!=]' // start of a non-capturing group
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+ '|[\\(\\)\\^]' // start/end of a group, or line start
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+ '|[^\\x5B\\x5C\\(\\)\\^]+' // run of other characters
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+ ')',
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'g'));
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var n = parts.length;
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|
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// Maps captured group numbers to the number they will occupy in
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// the output or to -1 if that has not been determined, or to
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// undefined if they need not be capturing in the output.
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var capturedGroups = [];
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// Walk over and identify back references to build the capturedGroups
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// mapping.
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for (var i = 0, groupIndex = 0; i < n; ++i) {
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var p = parts[i];
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if (p === '(') {
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// groups are 1-indexed, so max group index is count of '('
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++groupIndex;
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} else if ('\\' === p.charAt(0)) {
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var decimalValue = +p.substring(1);
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if (decimalValue) {
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if (decimalValue <= groupIndex) {
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capturedGroups[decimalValue] = -1;
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} else {
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|
// Replace with an unambiguous escape sequence so that
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// an octal escape sequence does not turn into a backreference
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// to a capturing group from an earlier regex.
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parts[i] = encodeEscape(decimalValue);
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}
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}
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}
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}
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// Renumber groups and reduce capturing groups to non-capturing groups
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// where possible.
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for (var i = 1; i < capturedGroups.length; ++i) {
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if (-1 === capturedGroups[i]) {
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capturedGroups[i] = ++capturedGroupIndex;
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}
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}
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for (var i = 0, groupIndex = 0; i < n; ++i) {
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var p = parts[i];
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if (p === '(') {
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++groupIndex;
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if (!capturedGroups[groupIndex]) {
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parts[i] = '(?:';
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}
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} else if ('\\' === p.charAt(0)) {
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|
var decimalValue = +p.substring(1);
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|
if (decimalValue && decimalValue <= groupIndex) {
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parts[i] = '\\' + capturedGroups[decimalValue];
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}
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}
|
|
}
|
|
|
|
// 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} isPreformatted true if white-space in text nodes should
|
|
* be considered significant.
|
|
* @return {Object} source code and the text 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 {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|e(?:l|nd)if|else|error|ifn?def|include|line|pragma|undef|warning)\b|[^\r\n]*)/,
|
|
null, '#']);
|
|
}
|
|
// #include <stdio.h>
|
|
fallthroughStylePatterns.push(
|
|
[PR_STRING,
|
|
/^<(?:(?:(?:\.\.\/)*|\/?)(?:[\w-]+(?:\/[\w-]+)+)?[\w-]+\.h(?:h|pp|\+\+)?|[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]*?(?:\*\/|$)/, null]);
|
|
}
|
|
var regexLiterals = options['regexLiterals'];
|
|
if (regexLiterals) {
|
|
/**
|
|
* @const
|
|
*/
|
|
var regexExcls = regexLiterals > 1
|
|
? '' // Multiline regex literals
|
|
: '\n\r';
|
|
/**
|
|
* @const
|
|
*/
|
|
var regexAny = regexExcls ? '.' : '[\\S\\s]';
|
|
/**
|
|
* @const
|
|
*/
|
|
var REGEX_LITERAL = (
|
|
// A regular expression literal starts with a slash that is
|
|
// not followed by * or / so that it is not confused with
|
|
// comments.
|
|
'/(?=[^/*' + regexExcls + '])'
|
|
// and then contains any number of raw characters,
|
|
+ '(?:[^/\\x5B\\x5C' + regexExcls + ']'
|
|
// escape sequences (\x5C),
|
|
+ '|\\x5C' + regexAny
|
|
// or non-nesting character sets (\x5B\x5D);
|
|
+ '|\\x5B(?:[^\\x5C\\x5D' + regexExcls + ']'
|
|
+ '|\\x5C' + regexAny + ')*(?:\\x5D|$))+'
|
|
// finally closed by a /.
|
|
+ '/');
|
|
fallthroughStylePatterns.push(
|
|
['lang-regex',
|
|
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']);
|
|
|
|
var punctuation =
|
|
// The Bash man page says
|
|
|
|
// A word is a sequence of characters considered as a single
|
|
// unit by GRUB. Words are separated by metacharacters,
|
|
// which are the following plus space, tab, and newline: { }
|
|
// | & $ ; < >
|
|
// ...
|
|
|
|
// A word beginning with # causes that word and all remaining
|
|
// characters on that line to be ignored.
|
|
|
|
// which means that only a '#' after /(?:^|[{}|&$;<>\s])/ starts a
|
|
// comment but empirically
|
|
// $ echo {#}
|
|
// {#}
|
|
// $ echo \$#
|
|
// $#
|
|
// $ echo }#
|
|
// }#
|
|
|
|
// so /(?:^|[|&;<>\s])/ is more appropriate.
|
|
|
|
// http://gcc.gnu.org/onlinedocs/gcc-2.95.3/cpp_1.html#SEC3
|
|
// suggests that this definition is compatible with a
|
|
// default mode that tries to use a single token definition
|
|
// to recognize both bash/python style comments and C
|
|
// preprocessor directives.
|
|
|
|
// This definition of punctuation does not include # in the list of
|
|
// follow-on exclusions, so # will not be broken before if preceeded
|
|
// by a punctuation character. We could try to exclude # after
|
|
// [|&;<>] but that doesn't seem to cause many major problems.
|
|
// If that does turn out to be a problem, we should change the below
|
|
// when hc is truthy to include # in the run of punctuation characters
|
|
// only when not followint [|&;<>].
|
|
'^.[^\\s\\w.$@\'"`/\\\\]*';
|
|
if (options['regexLiterals']) {
|
|
punctuation += '(?!\s*\/)';
|
|
}
|
|
|
|
fallthroughStylePatterns.push(
|
|
// TODO(mikesamuel): recognize non-latin letters and numerals in idents
|
|
[PR_LITERAL, /^@[a-z_$][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, new RegExp(punctuation), 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.
|
|
* @param {boolean} isPreformatted true iff white-space in text nodes should
|
|
* be treated as significant.
|
|
*/
|
|
function numberLines(node, opt_startLineNum, isPreformatted) {
|
|
var nocode = /(?:^|\s)nocode(?:\s|$)/;
|
|
var lineBreak = /\r\n?|\n/;
|
|
|
|
var document = node.ownerDocument;
|
|
|
|
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) {
|
|
var type = node.nodeType;
|
|
if (type == 1 && !nocode.test(node.className)) { // Element
|
|
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);
|
|
}
|
|
}
|
|
} else if ((type == 3 || type == 4) && isPreformatted) { // Text
|
|
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);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// 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,
|
|
* sourceNode: {HTMLElement} the element containing the source,
|
|
* 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 isIE8OrEarlier = /\bMSIE\s(\d+)/.exec(navigator.userAgent);
|
|
isIE8OrEarlier = isIE8OrEarlier && +isIE8OrEarlier[1] <= 8;
|
|
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 sourceNode = job.sourceNode;
|
|
var oldDisplay;
|
|
if (sourceNode) {
|
|
oldDisplay = sourceNode.style.display;
|
|
sourceNode.style.display = 'none';
|
|
}
|
|
try {
|
|
var decoration = null;
|
|
while (spanIndex < nSpans) {
|
|
var spanStart = spans[spanIndex];
|
|
var spanEnd = spans[spanIndex + 2] || sourceLength;
|
|
|
|
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 (isIE8OrEarlier) {
|
|
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;
|
|
}
|
|
}
|
|
} finally {
|
|
if (sourceNode) {
|
|
sourceNode.style.display = oldDisplay;
|
|
}
|
|
}
|
|
}
|
|
|
|
/** 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 (win['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
|
|
}), ['bash', 'bsh', 'csh', 'sh']);
|
|
registerLangHandler(sourceDecorator({
|
|
'keywords': PYTHON_KEYWORDS,
|
|
'hashComments': true,
|
|
'multiLineStrings': true,
|
|
'tripleQuotedStrings': true
|
|
}), ['cv', 'py', 'python']);
|
|
registerLangHandler(sourceDecorator({
|
|
'keywords': PERL_KEYWORDS,
|
|
'hashComments': true,
|
|
'multiLineStrings': true,
|
|
'regexLiterals': 2 // multiline regex literals
|
|
}), ['perl', 'pl', 'pm']);
|
|
registerLangHandler(sourceDecorator({
|
|
'keywords': RUBY_KEYWORDS,
|
|
'hashComments': true,
|
|
'multiLineStrings': true,
|
|
'regexLiterals': true
|
|
}), ['rb', 'ruby']);
|
|
registerLangHandler(sourceDecorator({
|
|
'keywords': JSCRIPT_KEYWORDS,
|
|
'cStyleComments': true,
|
|
'regexLiterals': true
|
|
}), ['javascript', 'js']);
|
|
registerLangHandler(sourceDecorator({
|
|
'keywords': COFFEE_KEYWORDS,
|
|
'hashComments': 3, // ### style block comments
|
|
'cStyleComments': true,
|
|
'multilineStrings': true,
|
|
'tripleQuotedStrings': true,
|
|
'regexLiterals': true
|
|
}), ['coffee']);
|
|
registerLangHandler(sourceDecorator({
|
|
'keywords': RUST_KEYWORDS,
|
|
'cStyleComments': true,
|
|
'multilineStrings': true
|
|
}), ['rc', 'rs', 'rust']);
|
|
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, job.pre);
|
|
/** 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 (win['console']) {
|
|
console['log'](e && e['stack'] || e);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Pretty print a chunk of code.
|
|
* @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('div');
|
|
// 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.
|
|
// The pre-tag is required for IE8 which strips newlines from innerHTML
|
|
// when it is injected into a <pre> tag.
|
|
// http://stackoverflow.com/questions/451486/pre-tag-loses-line-breaks-when-setting-innerhtml-in-ie
|
|
// http://stackoverflow.com/questions/195363/inserting-a-newline-into-a-pre-tag-ie-javascript
|
|
container.innerHTML = '<pre>' + sourceCodeHtml + '</pre>';
|
|
container = container.firstChild;
|
|
if (opt_numberLines) {
|
|
numberLines(container, opt_numberLines, true);
|
|
}
|
|
|
|
var job = {
|
|
langExtension: opt_langExtension,
|
|
numberLines: opt_numberLines,
|
|
sourceNode: container,
|
|
pre: 1
|
|
};
|
|
applyDecorator(job);
|
|
return container.innerHTML;
|
|
}
|
|
|
|
/**
|
|
* 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}.
|
|
*/
|
|
function $prettyPrint(opt_whenDone, opt_root) {
|
|
var root = opt_root || document.body;
|
|
var doc = root.ownerDocument || document;
|
|
function byTagName(tn) { return root.getElementsByTagName(tn); }
|
|
// fetch a list of nodes to rewrite
|
|
var codeSegments = [byTagName('pre'), byTagName('code'), byTagName('xmp')];
|
|
var elements = [];
|
|
for (var i = 0; i < codeSegments.length; ++i) {
|
|
for (var j = 0, n = codeSegments[i].length; j < n; ++j) {
|
|
elements.push(codeSegments[i][j]);
|
|
}
|
|
}
|
|
codeSegments = null;
|
|
|
|
var clock = Date;
|
|
if (!clock['now']) {
|
|
clock = { 'now': function () { return +(new Date); } };
|
|
}
|
|
|
|
// The loop is broken into a series of continuations to make sure that we
|
|
// don't make the browser unresponsive when rewriting a large page.
|
|
var k = 0;
|
|
var prettyPrintingJob;
|
|
|
|
var langExtensionRe = /\blang(?:uage)?-([\w.]+)(?!\S)/;
|
|
var prettyPrintRe = /\bprettyprint\b/;
|
|
var prettyPrintedRe = /\bprettyprinted\b/;
|
|
var preformattedTagNameRe = /pre|xmp/i;
|
|
var codeRe = /^code$/i;
|
|
var preCodeXmpRe = /^(?:pre|code|xmp)$/i;
|
|
var EMPTY = {};
|
|
|
|
function doWork() {
|
|
var endTime = (win['PR_SHOULD_USE_CONTINUATION'] ?
|
|
clock['now']() + 250 /* ms */ :
|
|
Infinity);
|
|
for (; k < elements.length && clock['now']() < endTime; k++) {
|
|
var cs = elements[k];
|
|
|
|
// Look for a preceding comment like
|
|
// <?prettify lang="..." linenums="..."?>
|
|
var attrs = EMPTY;
|
|
{
|
|
for (var preceder = cs; (preceder = preceder.previousSibling);) {
|
|
var nt = preceder.nodeType;
|
|
// <?foo?> is parsed by HTML 5 to a comment node (8)
|
|
// like <!--?foo?-->, but in XML is a processing instruction
|
|
var value = (nt === 7 || nt === 8) && preceder.nodeValue;
|
|
if (value
|
|
? !/^\??prettify\b/.test(value)
|
|
: (nt !== 3 || /\S/.test(preceder.nodeValue))) {
|
|
// Skip over white-space text nodes but not others.
|
|
break;
|
|
}
|
|
if (value) {
|
|
attrs = {};
|
|
value.replace(
|
|
/\b(\w+)=([\w:.%+-]+)/g,
|
|
function (_, name, value) { attrs[name] = value; });
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
var className = cs.className;
|
|
if ((attrs !== EMPTY || prettyPrintRe.test(className))
|
|
// Don't redo this if we've already done it.
|
|
// This allows recalling pretty print to just prettyprint elements
|
|
// that have been added to the page since last call.
|
|
&& !prettyPrintedRe.test(className)) {
|
|
|
|
// make sure this is not nested in an already prettified element
|
|
var nested = false;
|
|
for (var p = cs.parentNode; p; p = p.parentNode) {
|
|
var tn = p.tagName;
|
|
if (preCodeXmpRe.test(tn)
|
|
&& p.className && prettyPrintRe.test(p.className)) {
|
|
nested = true;
|
|
break;
|
|
}
|
|
}
|
|
if (!nested) {
|
|
// Mark done. If we fail to prettyprint for whatever reason,
|
|
// we shouldn't try again.
|
|
cs.className += ' prettyprinted';
|
|
|
|
// 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 = attrs['lang'];
|
|
if (!langExtension) {
|
|
langExtension = className.match(langExtensionRe);
|
|
// Support <pre class="prettyprint"><code class="language-c">
|
|
var wrapper;
|
|
if (!langExtension && (wrapper = childContentWrapper(cs))
|
|
&& codeRe.test(wrapper.tagName)) {
|
|
langExtension = wrapper.className.match(langExtensionRe);
|
|
}
|
|
|
|
if (langExtension) { langExtension = langExtension[1]; }
|
|
}
|
|
|
|
var preformatted;
|
|
if (preformattedTagNameRe.test(cs.tagName)) {
|
|
preformatted = 1;
|
|
} else {
|
|
var currentStyle = cs['currentStyle'];
|
|
var defaultView = doc.defaultView;
|
|
var whitespace = (
|
|
currentStyle
|
|
? currentStyle['whiteSpace']
|
|
: (defaultView
|
|
&& defaultView.getComputedStyle)
|
|
? defaultView.getComputedStyle(cs, null)
|
|
.getPropertyValue('white-space')
|
|
: 0);
|
|
preformatted = whitespace
|
|
&& 'pre' === whitespace.substring(0, 3);
|
|
}
|
|
|
|
// Look for a class like linenums or linenums:<n> where <n> is the
|
|
// 1-indexed number of the first line.
|
|
var lineNums = attrs['linenums'];
|
|
if (!(lineNums = lineNums === 'true' || +lineNums)) {
|
|
lineNums = className.match(/\blinenums\b(?::(\d+))?/);
|
|
lineNums =
|
|
lineNums
|
|
? lineNums[1] && lineNums[1].length
|
|
? +lineNums[1] : true
|
|
: false;
|
|
}
|
|
if (lineNums) { numberLines(cs, lineNums, preformatted); }
|
|
|
|
// do the pretty printing
|
|
prettyPrintingJob = {
|
|
langExtension: langExtension,
|
|
sourceNode: cs,
|
|
numberLines: lineNums,
|
|
pre: preformatted
|
|
};
|
|
applyDecorator(prettyPrintingJob);
|
|
}
|
|
}
|
|
}
|
|
if (k < elements.length) {
|
|
// finish up in a continuation
|
|
setTimeout(doWork, 250);
|
|
} else if ('function' === typeof opt_whenDone) {
|
|
opt_whenDone();
|
|
}
|
|
}
|
|
|
|
doWork();
|
|
}
|
|
|
|
/**
|
|
* Contains functions for creating and registering new language handlers.
|
|
* @type {Object}
|
|
*/
|
|
var PR = win['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,
|
|
'prettyPrintOne':
|
|
IN_GLOBAL_SCOPE
|
|
? (win['prettyPrintOne'] = $prettyPrintOne)
|
|
: (prettyPrintOne = $prettyPrintOne),
|
|
'prettyPrint': prettyPrint =
|
|
IN_GLOBAL_SCOPE
|
|
? (win['prettyPrint'] = $prettyPrint)
|
|
: (prettyPrint = $prettyPrint)
|
|
};
|
|
|
|
// Make PR available via the Asynchronous Module Definition (AMD) API.
|
|
// Per https://github.com/amdjs/amdjs-api/wiki/AMD:
|
|
// The Asynchronous Module Definition (AMD) API specifies a
|
|
// mechanism for defining modules such that the module and its
|
|
// dependencies can be asynchronously loaded.
|
|
// ...
|
|
// To allow a clear indicator that a global define function (as
|
|
// needed for script src browser loading) conforms to the AMD API,
|
|
// any global define function SHOULD have a property called "amd"
|
|
// whose value is an object. This helps avoid conflict with any
|
|
// other existing JavaScript code that could have defined a define()
|
|
// function that does not conform to the AMD API.
|
|
if (typeof define === "function" && define['amd']) {
|
|
define("google-code-prettify", [], function () {
|
|
return PR;
|
|
});
|
|
}
|
|
})();
|