// 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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* <p>
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*
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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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* @overrides window
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*/
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// JSLint declarations
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/*global console, document, navigator, setTimeout, window */
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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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/** the number of characters between tab columns */
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window['PR_TAB_WIDTH'] = 8;
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/** Walks the DOM returning a properly escaped version of innerHTML.
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* @param {Node} node
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* @param {Array.<string>} out output buffer that receives chunks of HTML.
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*/
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window['PR_normalizedHtml']
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/** Contains functions for creating and registering new language handlers.
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* @type {Object}
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*/
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= window['PR']
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/** Pretty print a chunk of code.
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*
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* @param {string} sourceCodeHtml code as html
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* @return {string} code as html, but prettier
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*/
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= window['prettyPrintOne']
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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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* @param {Function?} opt_whenDone if specified, called when the last entry
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* has been finished.
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*/
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= window['prettyPrint'] = void 0;
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/** browser detection. @extern @returns false if not IE, otherwise the major version. */
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window['_pr_isIE6'] = function () {
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var ieVersion = navigator && navigator.userAgent &&
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navigator.userAgent.match(/\bMSIE ([678])\./);
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ieVersion = ieVersion ? +ieVersion[1] : false;
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window['_pr_isIE6'] = function () { return ieVersion; };
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return ieVersion;
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};
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(function () {
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// Keyword lists for various languages.
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var FLOW_CONTROL_KEYWORDS =
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"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 int long register short signed sizeof " +
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"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 " +
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"dynamic_cast explicit export friend inline late_check " +
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"mutable namespace nullptr reinterpret_cast static_assert static_cast " +
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"template typeid typename using virtual wchar_t where ";
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var JAVA_KEYWORDS = COMMON_KEYWORDS +
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"abstract boolean byte extends final finally implements import " +
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"instanceof null native package strictfp super synchronized throws " +
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"transient ";
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var CSHARP_KEYWORDS = JAVA_KEYWORDS +
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"as base by checked decimal delegate descending event " +
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"fixed foreach from group implicit in interface internal into is lock " +
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"object out override orderby params partial readonly ref sbyte sealed " +
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"stackalloc string select uint ulong unchecked unsafe ushort var ";
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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 def" +
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" defined elsif end ensure false in module next nil not or redo rescue " +
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"retry self super then true undef unless until when yield BEGIN END ";
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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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// token style names. correspond to css classes
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/** token style for a string literal */
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var PR_STRING = 'str';
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/** token style for a keyword */
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var PR_KEYWORD = 'kwd';
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/** token style for a comment */
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var PR_COMMENT = 'com';
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/** token style for a type */
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var PR_TYPE = 'typ';
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/** token style for a literal value. e.g. 1, null, true. */
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var PR_LITERAL = 'lit';
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/** token style for a punctuation string. */
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var PR_PUNCTUATION = 'pun';
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/** token style for a punctuation string. */
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var PR_PLAIN = 'pln';
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/** token style for an sgml tag. */
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var PR_TAG = 'tag';
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/** token style for a markup declaration such as a DOCTYPE. */
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var PR_DECLARATION = 'dec';
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/** token style for embedded source. */
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var PR_SOURCE = 'src';
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/** token style for an sgml attribute name. */
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var PR_ATTRIB_NAME = 'atn';
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/** token style for an sgml attribute value. */
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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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*/
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var PR_NOCODE = 'nocode';
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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://www.mozilla.org/js/language/js20/rationale/syntax.html has the full
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* list, but I've removed ones that might be problematic when seen in
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* 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 a 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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*/
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var REGEXP_PRECEDER_PATTERN = function () {
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var preceders = [
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"!", "!=", "!==", "#", "%", "%=", "&", "&&", "&&=",
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"&=", "(", "*", "*=", /* "+", */ "+=", ",", /* "-", */ "-=",
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"->", /*".", "..", "...", handled below */ "/", "/=", ":", "::", ";",
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"<", "<<", "<<=", "<=", "=", "==", "===", ">",
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">=", ">>", ">>=", ">>>", ">>>=", "?", "@", "[",
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"^", "^=", "^^", "^^=", "{", "|", "|=", "||",
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"||=", "~" /* handles =~ and !~ */,
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"break", "case", "continue", "delete",
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"do", "else", "finally", "instanceof",
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"return", "throw", "try", "typeof"
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];
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var pattern = '(?:^^|[+-]';
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for (var i = 0; i < preceders.length; ++i) {
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pattern += '|' + preceders[i].replace(/([^=<>:&a-z])/g, '\\$1');
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}
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pattern += ')\\s*'; // matches at end, and matches empty string
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return pattern;
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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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// Define regexps here so that the interpreter doesn't have to create an
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// object each time the function containing them is called.
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// The language spec requires a new object created even if you don't access
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// the $1 members.
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var pr_amp = /&/g;
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var pr_lt = /</g;
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var pr_gt = />/g;
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var pr_quot = /\"/g;
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/** like textToHtml but escapes double quotes to be attribute safe. */
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function attribToHtml(str) {
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return str.replace(pr_amp, '&')
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.replace(pr_lt, '<')
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.replace(pr_gt, '>')
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.replace(pr_quot, '"');
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}
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/** escapest html special characters to html. */
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function textToHtml(str) {
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return str.replace(pr_amp, '&')
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.replace(pr_lt, '<')
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.replace(pr_gt, '>');
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}
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var pr_ltEnt = /</g;
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var pr_gtEnt = />/g;
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var pr_aposEnt = /'/g;
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var pr_quotEnt = /"/g;
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var pr_ampEnt = /&/g;
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var pr_nbspEnt = / /g;
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/** unescapes html to plain text. */
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function htmlToText(html) {
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var pos = html.indexOf('&');
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if (pos < 0) { return html; }
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// Handle numeric entities specially. We can't use functional substitution
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// since that doesn't work in older versions of Safari.
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// These should be rare since most browsers convert them to normal chars.
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for (--pos; (pos = html.indexOf('&#', pos + 1)) >= 0;) {
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var end = html.indexOf(';', pos);
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if (end >= 0) {
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var num = html.substring(pos + 3, end);
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var radix = 10;
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if (num && num.charAt(0) === 'x') {
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num = num.substring(1);
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radix = 16;
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}
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var codePoint = parseInt(num, radix);
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if (!isNaN(codePoint)) {
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html = (html.substring(0, pos) + String.fromCharCode(codePoint) +
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html.substring(end + 1));
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}
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}
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}
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return html.replace(pr_ltEnt, '<')
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.replace(pr_gtEnt, '>')
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.replace(pr_aposEnt, "'")
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.replace(pr_quotEnt, '"')
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.replace(pr_nbspEnt, ' ')
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.replace(pr_ampEnt, '&');
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}
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/** is the given node's innerHTML normally unescaped? */
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function isRawContent(node) {
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return 'XMP' === node.tagName;
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}
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var newlineRe = /[\r\n]/g;
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/**
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* Are newlines and adjacent spaces significant in the given node's innerHTML?
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*/
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function isPreformatted(node, content) {
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// PRE means preformatted, and is a very common case, so don't create
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// unnecessary computed style objects.
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if ('PRE' === node.tagName) { return true; }
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if (!newlineRe.test(content)) { return true; } // Don't care
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var whitespace = '';
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// For disconnected nodes, IE has no currentStyle.
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if (node.currentStyle) {
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whitespace = node.currentStyle.whiteSpace;
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} else if (window.getComputedStyle) {
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// Firefox makes a best guess if node is disconnected whereas Safari
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// returns the empty string.
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whitespace = window.getComputedStyle(node, null).whiteSpace;
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}
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return !whitespace || whitespace === 'pre';
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}
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function normalizedHtml(node, out) {
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switch (node.nodeType) {
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case 1: // an element
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var name = node.tagName.toLowerCase();
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out.push('<', name);
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for (var i = 0; i < node.attributes.length; ++i) {
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var attr = node.attributes[i];
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if (!attr.specified) { continue; }
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out.push(' ');
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normalizedHtml(attr, out);
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}
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out.push('>');
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for (var child = node.firstChild; child; child = child.nextSibling) {
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normalizedHtml(child, out);
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}
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if (node.firstChild || !/^(?:br|link|img)$/.test(name)) {
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out.push('<\/', name, '>');
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}
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break;
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case 2: // an attribute
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out.push(node.name.toLowerCase(), '="', attribToHtml(node.value), '"');
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break;
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case 3: case 4: // text
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out.push(textToHtml(node.nodeValue));
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break;
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}
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}
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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 o the sets o strings matched d 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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function decodeEscape(charsetPart) {
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if (charsetPart.charAt(0) !== '\\') { return charsetPart.charCodeAt(0); }
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switch (charsetPart.charAt(1)) {
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case 'b': return 8;
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case 't': return 9;
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case 'n': return 0xa;
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case 'v': return 0xb;
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case 'f': return 0xc;
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case 'r': return 0xd;
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case 'u': case 'x':
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return parseInt(charsetPart.substring(2), 16)
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|| charsetPart.charCodeAt(1);
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case '0': case '1': case '2': case '3': case '4':
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case '5': case '6': case '7':
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return parseInt(charsetPart.substring(1), 8);
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default: 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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if (ch === '\\' || ch === '-' || ch === '[' || ch === ']') {
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ch = '\\' + ch;
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}
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return 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 groups = [];
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var ranges = [];
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var inverse = charsetParts[0] === '^';
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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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switch (p) {
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case '\\B': case '\\b':
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case '\\D': case '\\d':
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case '\\S': case '\\s':
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case '\\W': case '\\w':
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groups.push(p);
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continue;
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}
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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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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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// [[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 = [NaN, NaN];
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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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var out = ['['];
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if (inverse) { out.push('^'); }
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out.push.apply(out, groups);
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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/emd 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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// 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 && decimalValue <= groupIndex) {
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capturedGroups[decimalValue] = -1;
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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] === undefined) {
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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[groupIndex];
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}
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}
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}
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// Remove any prefix anchors so that the output will match anywhere.
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// ^^ really does mean an anchored match though.
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for (var i = 0, groupIndex = 0; i < n; ++i) {
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if ('^' === parts[i] && '^' !== parts[i + 1]) { parts[i] = ''; }
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}
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// Expand letters to groupts to handle mixing of case-sensitive and
|
// case-insensitive patterns if necessary.
|
if (regex.ignoreCase && needToFoldCase) {
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for (var i = 0; i < n; ++i) {
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var p = parts[i];
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var ch0 = p.charAt(0);
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if (p.length >= 2 && ch0 === '[') {
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parts[i] = caseFoldCharset(p);
|
} else if (ch0 !== '\\') {
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// TODO: handle letters in numeric escapes.
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parts[i] = p.replace(
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/[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');
|
}
|
|
var PR_innerHtmlWorks = null;
|
function getInnerHtml(node) {
|
// inner html is hopelessly broken in Safari 2.0.4 when the content is
|
// an html description of well formed XML and the containing tag is a PRE
|
// tag, so we detect that case and emulate innerHTML.
|
if (null === PR_innerHtmlWorks) {
|
var testNode = document.createElement('PRE');
|
testNode.appendChild(
|
document.createTextNode('<!DOCTYPE foo PUBLIC "foo bar">\n<foo />'));
|
PR_innerHtmlWorks = !/</.test(testNode.innerHTML);
|
}
|
|
if (PR_innerHtmlWorks) {
|
var content = node.innerHTML;
|
// XMP tags contain unescaped entities so require special handling.
|
if (isRawContent(node)) {
|
content = textToHtml(content);
|
} else if (!isPreformatted(node, content)) {
|
content = content.replace(/(<br\s*\/?>)[\r\n]+/g, '$1')
|
.replace(/(?:[\r\n]+[ \t]*)+/g, ' ');
|
}
|
return content;
|
}
|
|
var out = [];
|
for (var child = node.firstChild; child; child = child.nextSibling) {
|
normalizedHtml(child, out);
|
}
|
return out.join('');
|
}
|
|
/** returns a function that expand tabs to spaces. This function can be fed
|
* successive chunks of text, and will maintain its own internal state to
|
* keep track of how tabs are expanded.
|
* @return {function (string) : string} a function that takes
|
* plain text and return the text with tabs expanded.
|
* @private
|
*/
|
function makeTabExpander(tabWidth) {
|
var SPACES = ' ';
|
var charInLine = 0;
|
|
return function (plainText) {
|
// walk over each character looking for tabs and newlines.
|
// On tabs, expand them. On newlines, reset charInLine.
|
// Otherwise increment charInLine
|
var out = null;
|
var pos = 0;
|
for (var i = 0, n = plainText.length; i < n; ++i) {
|
var ch = plainText.charAt(i);
|
|
switch (ch) {
|
case '\t':
|
if (!out) { out = []; }
|
out.push(plainText.substring(pos, i));
|
// calculate how much space we need in front of this part
|
// nSpaces is the amount of padding -- the number of spaces needed
|
// to move us to the next column, where columns occur at factors of
|
// tabWidth.
|
var nSpaces = tabWidth - (charInLine % tabWidth);
|
charInLine += nSpaces;
|
for (; nSpaces >= 0; nSpaces -= SPACES.length) {
|
out.push(SPACES.substring(0, nSpaces));
|
}
|
pos = i + 1;
|
break;
|
case '\n':
|
charInLine = 0;
|
break;
|
default:
|
++charInLine;
|
}
|
}
|
if (!out) { return plainText; }
|
out.push(plainText.substring(pos));
|
return out.join('');
|
};
|
}
|
|
var pr_chunkPattern = new RegExp(
|
'[^<]+' // A run of characters other than '<'
|
+ '|<\!--[\\s\\S]*?--\>' // an HTML comment
|
+ '|<!\\[CDATA\\[[\\s\\S]*?\\]\\]>' // a CDATA section
|
// a probable tag that should not be highlighted
|
+ '|<\/?[a-zA-Z](?:[^>\"\']|\'[^\']*\'|\"[^\"]*\")*>'
|
+ '|<', // A '<' that does not begin a larger chunk
|
'g');
|
var pr_commentPrefix = /^<\!--/;
|
var pr_cdataPrefix = /^<!\[CDATA\[/;
|
var pr_brPrefix = /^<br\b/i;
|
var pr_tagNameRe = /^<(\/?)([a-zA-Z][a-zA-Z0-9]*)/;
|
|
/** split markup into chunks of html tags (style null) and
|
* plain text (style {@link #PR_PLAIN}), converting tags which are
|
* significant for tokenization (<br>) into their textual equivalent.
|
*
|
* @param {string} s html where whitespace is considered significant.
|
* @return {Object} source code and extracted tags.
|
* @private
|
*/
|
function extractTags(s) {
|
// since the pattern has the 'g' modifier and defines no capturing groups,
|
// this will return a list of all chunks which we then classify and wrap as
|
// PR_Tokens
|
var matches = s.match(pr_chunkPattern);
|
var sourceBuf = [];
|
var sourceBufLen = 0;
|
var extractedTags = [];
|
if (matches) {
|
for (var i = 0, n = matches.length; i < n; ++i) {
|
var match = matches[i];
|
if (match.length > 1 && match.charAt(0) === '<') {
|
if (pr_commentPrefix.test(match)) { continue; }
|
if (pr_cdataPrefix.test(match)) {
|
// strip CDATA prefix and suffix. Don't unescape since it's CDATA
|
sourceBuf.push(match.substring(9, match.length - 3));
|
sourceBufLen += match.length - 12;
|
} else if (pr_brPrefix.test(match)) {
|
// <br> tags are lexically significant so convert them to text.
|
// This is undone later.
|
sourceBuf.push('\n');
|
++sourceBufLen;
|
} else {
|
if (match.indexOf(PR_NOCODE) >= 0 && isNoCodeTag(match)) {
|
// A <span class="nocode"> will start a section that should be
|
// ignored. Continue walking the list until we see a matching end
|
// tag.
|
var name = match.match(pr_tagNameRe)[2];
|
var depth = 1;
|
var j;
|
end_tag_loop:
|
for (j = i + 1; j < n; ++j) {
|
var name2 = matches[j].match(pr_tagNameRe);
|
if (name2 && name2[2] === name) {
|
if (name2[1] === '/') {
|
if (--depth === 0) { break end_tag_loop; }
|
} else {
|
++depth;
|
}
|
}
|
}
|
if (j < n) {
|
extractedTags.push(
|
sourceBufLen, matches.slice(i, j + 1).join(''));
|
i = j;
|
} else { // Ignore unclosed sections.
|
extractedTags.push(sourceBufLen, match);
|
}
|
} else {
|
extractedTags.push(sourceBufLen, match);
|
}
|
}
|
} else {
|
var literalText = htmlToText(match);
|
sourceBuf.push(literalText);
|
sourceBufLen += literalText.length;
|
}
|
}
|
}
|
return { source: sourceBuf.join(''), tags: extractedTags };
|
}
|
|
/** True if the given tag contains a class attribute with the nocode class. */
|
function isNoCodeTag(tag) {
|
return !!tag
|
// First canonicalize the representation of attributes
|
.replace(/\s(\w+)\s*=\s*(?:\"([^\"]*)\"|'([^\']*)'|(\S+))/g,
|
' $1="$2$3$4"')
|
// Then look for the attribute we want.
|
.match(/[cC][lL][aA][sS][sS]=\"[^\"]*\bnocode\b/);
|
}
|
|
/**
|
* 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 = {
|
source: sourceCode,
|
basePos: basePos
|
};
|
langHandler(job);
|
out.push.apply(out, job.decorations);
|
}
|
|
/** 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;
|
var notWs = /\S/;
|
|
/**
|
* Lexes job.source and produces an output array job.decorations of style
|
* classes preceded by the position at which they start in job.source in
|
* order.
|
*
|
* @param {Object} job an object like {@code
|
* source: {string} sourceText plain text,
|
* basePos: {int} position of job.source in the larger chunk of
|
* sourceCode.
|
* }
|
*/
|
var decorate = function (job) {
|
var sourceCode = job.source, 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, /^@\"(?:[^\"]|\"\")*(?:\"|$)/, null]);
|
}
|
if (options['hashComments']) {
|
if (options['cStyleComments']) {
|
// Stop C preprocessor declarations at an unclosed open comment
|
shortcutStylePatterns.push(
|
[PR_COMMENT, /^#(?:(?:define|elif|else|endif|error|ifdef|include|ifndef|line|pragma|undef|warning)\b|[^\r\n]*)/,
|
null, '#']);
|
fallthroughStylePatterns.push(
|
[PR_STRING,
|
/^<(?:(?:(?:\.\.\/)*|\/?)(?:[\w-]+(?:\/[\w-]+)+)?[\w-]+\.h|[a-z]\w*)>/,
|
null]);
|
} else {
|
shortcutStylePatterns.push([PR_COMMENT, /^#[^\r\n]*/, null, '#']);
|
}
|
}
|
if (options['cStyleComments']) {
|
fallthroughStylePatterns.push([PR_COMMENT, /^\/\/[^\r\n]*/, null]);
|
fallthroughStylePatterns.push(
|
[PR_COMMENT, /^\/\*[\s\S]*?(?:\*\/|$)/, null]);
|
}
|
if (options['regexLiterals']) {
|
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|$))+'
|
// finally closed by a /.
|
+ '/');
|
fallthroughStylePatterns.push(
|
['lang-regex',
|
new RegExp('^' + REGEXP_PRECEDER_PATTERN + '(' + REGEX_LITERAL + ')')
|
]);
|
}
|
|
var keywords = options['keywords'].replace(/^\s+|\s+$/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_$@0-9]*/, null],
|
[PR_PLAIN, /^[a-z_$][a-z_$@0-9]*/i, null],
|
[PR_LITERAL,
|
new RegExp(
|
'^(?:'
|
// A hex number
|
+ '0x[a-f0-9]+'
|
// or an octal or decimal number,
|
+ '|(?:\\d(?:_\\d+)*\\d*(?:\\.\\d*)?|\\.\\d\\+)'
|
// possibly in scientific notation
|
+ '(?:e[+\\-]?\\d+)?'
|
+ ')'
|
// with an optional modifier like UL for unsigned long
|
+ '[a-z]*', 'i'),
|
null, '0123456789'],
|
[PR_PUNCTUATION, /^.[^\s\w\.$@\'\"\`\/\#]*/, null]);
|
|
return createSimpleLexer(shortcutStylePatterns, fallthroughStylePatterns);
|
}
|
|
var decorateSource = sourceDecorator({
|
'keywords': ALL_KEYWORDS,
|
'hashComments': true,
|
'cStyleComments': true,
|
'multiLineStrings': true,
|
'regexLiterals': true
|
});
|
|
/** Breaks {@code job.source} around style boundaries in
|
* {@code job.decorations} while re-interleaving {@code job.extractedTags},
|
* and leaves the result in {@code job.prettyPrintedHtml}.
|
* @param {Object} job like {
|
* source: {string} source as plain text,
|
* extractedTags: {Array.<number|string>} extractedTags chunks of raw
|
* html preceded by their position in {@code job.source}
|
* in order
|
* decorations: {Array.<number|string} an array of style classes preceded
|
* by the position at which they start in job.source in order
|
* }
|
* @private
|
*/
|
function recombineTagsAndDecorations(job) {
|
var sourceText = job.source;
|
var extractedTags = job.extractedTags;
|
var decorations = job.decorations;
|
|
var html = [];
|
// index past the last char in sourceText written to html
|
var outputIdx = 0;
|
|
var openDecoration = null;
|
var currentDecoration = null;
|
var tagPos = 0; // index into extractedTags
|
var decPos = 0; // index into decorations
|
var tabExpander = makeTabExpander(window['PR_TAB_WIDTH']);
|
|
var adjacentSpaceRe = /([\r\n ]) /g;
|
var startOrSpaceRe = /(^| ) /gm;
|
var newlineRe = /\r\n?|\n/g;
|
var trailingSpaceRe = /[ \r\n]$/;
|
var lastWasSpace = true; // the last text chunk emitted ended with a space.
|
|
// A helper function that is responsible for opening sections of decoration
|
// and outputing properly escaped chunks of source
|
function emitTextUpTo(sourceIdx) {
|
if (sourceIdx > outputIdx) {
|
if (openDecoration && openDecoration !== currentDecoration) {
|
// Close the current decoration
|
html.push('</span>');
|
openDecoration = null;
|
}
|
if (!openDecoration && currentDecoration) {
|
openDecoration = currentDecoration;
|
html.push('<span class="', openDecoration, '">');
|
}
|
// This interacts badly with some wikis which introduces paragraph tags
|
// into pre blocks for some strange reason.
|
// It's necessary for IE though which seems to lose the preformattedness
|
// of <pre> tags when their innerHTML is assigned.
|
// http://stud3.tuwien.ac.at/~e0226430/innerHtmlQuirk.html
|
// and it serves to undo the conversion of <br>s to newlines done in
|
// chunkify.
|
var htmlChunk = textToHtml(
|
tabExpander(sourceText.substring(outputIdx, sourceIdx)))
|
.replace(lastWasSpace
|
? startOrSpaceRe
|
: adjacentSpaceRe, '$1 ');
|
// Keep track of whether we need to escape space at the beginning of the
|
// next chunk.
|
lastWasSpace = trailingSpaceRe.test(htmlChunk);
|
// IE collapses multiple adjacient <br>s into 1 line break.
|
// Prefix every <br> with ' ' can prevent such IE's behavior.
|
var lineBreakHtml = window['_pr_isIE6']() ? ' <br />' : '<br />';
|
html.push(htmlChunk.replace(newlineRe, lineBreakHtml));
|
outputIdx = sourceIdx;
|
}
|
}
|
|
while (true) {
|
// Determine if we're going to consume a tag this time around. Otherwise
|
// we consume a decoration or exit.
|
var outputTag;
|
if (tagPos < extractedTags.length) {
|
if (decPos < decorations.length) {
|
// Pick one giving preference to extractedTags since we shouldn't open
|
// a new style that we're going to have to immediately close in order
|
// to output a tag.
|
outputTag = extractedTags[tagPos] <= decorations[decPos];
|
} else {
|
outputTag = true;
|
}
|
} else {
|
outputTag = false;
|
}
|
// Consume either a decoration or a tag or exit.
|
if (outputTag) {
|
emitTextUpTo(extractedTags[tagPos]);
|
if (openDecoration) {
|
// Close the current decoration
|
html.push('</span>');
|
openDecoration = null;
|
}
|
html.push(extractedTags[tagPos + 1]);
|
tagPos += 2;
|
} else if (decPos < decorations.length) {
|
emitTextUpTo(decorations[decPos]);
|
currentDecoration = decorations[decPos + 1];
|
decPos += 2;
|
} else {
|
break;
|
}
|
}
|
emitTextUpTo(sourceText.length);
|
if (openDecoration) {
|
html.push('</span>');
|
}
|
job.prettyPrintedHtml = html.join('');
|
}
|
|
/** 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 {
|
* source: {string} as plain text.
|
* decorations: {Array.<number|string>} an array of style classes
|
* preceded by the position at which they start in
|
* job.source 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 ('console' in window) {
|
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
|
}), ['c', 'cc', 'cpp', 'cxx', 'cyc', 'm']);
|
registerLangHandler(sourceDecorator({
|
'keywords': 'null true false'
|
}), ['json']);
|
registerLangHandler(sourceDecorator({
|
'keywords': CSHARP_KEYWORDS,
|
'hashComments': true,
|
'cStyleComments': true,
|
'verbatimStrings': true
|
}), ['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(
|
createSimpleLexer([], [[PR_STRING, /^[\s\S]+/]]), ['regex']);
|
|
function applyDecorator(job) {
|
var sourceCodeHtml = job.sourceCodeHtml;
|
var opt_langExtension = job.langExtension;
|
|
// Prepopulate output in case processing fails with an exception.
|
job.prettyPrintedHtml = sourceCodeHtml;
|
|
try {
|
// Extract tags, and convert the source code to plain text.
|
var sourceAndExtractedTags = extractTags(sourceCodeHtml);
|
/** Plain text. @type {string} */
|
var source = sourceAndExtractedTags.source;
|
job.source = source;
|
job.basePos = 0;
|
|
/** Even entries are positions in source in ascending order. Odd entries
|
* are tags that were extracted at that position.
|
* @type {Array.<number|string>}
|
*/
|
job.extractedTags = sourceAndExtractedTags.tags;
|
|
// Apply the appropriate language handler
|
langHandlerForExtension(opt_langExtension, source)(job);
|
// Integrate the decorations and tags back into the source code to produce
|
// a decorated html string which is left in job.prettyPrintedHtml.
|
recombineTagsAndDecorations(job);
|
} catch (e) {
|
if ('console' in window) {
|
console.log(e);
|
console.trace();
|
}
|
}
|
}
|
|
function prettyPrintOne(sourceCodeHtml, opt_langExtension) {
|
var job = {
|
sourceCodeHtml: sourceCodeHtml,
|
langExtension: opt_langExtension
|
};
|
applyDecorator(job);
|
return job.prettyPrintedHtml;
|
}
|
|
function prettyPrint(opt_whenDone) {
|
var isIE678 = window['_pr_isIE6']();
|
var ieNewline = isIE678 === 6 ? '\r\n' : '\r';
|
// See bug 71 and http://stackoverflow.com/questions/136443/why-doesnt-ie7-
|
|
// fetch a list of nodes to rewrite
|
var codeSegments = [
|
document.getElementsByTagName('pre'),
|
document.getElementsByTagName('code'),
|
document.getElementsByTagName('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).getTime(); } };
|
}
|
|
// 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;
|
|
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];
|
if (cs.className && cs.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.
|
var langExtension = cs.className.match(/\blang-(\w+)\b/);
|
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) {
|
// fetch the content as a snippet of properly escaped HTML.
|
// Firefox adds newlines at the end.
|
var content = getInnerHtml(cs);
|
content = content.replace(/(?:\r\n?|\n)$/, '');
|
|
// do the pretty printing
|
prettyPrintingJob = {
|
sourceCodeHtml: content,
|
langExtension: langExtension,
|
sourceNode: cs
|
};
|
applyDecorator(prettyPrintingJob);
|
replaceWithPrettyPrintedHtml();
|
}
|
}
|
}
|
if (k < elements.length) {
|
// finish up in a continuation
|
setTimeout(doWork, 250);
|
} else if (opt_whenDone) {
|
opt_whenDone();
|
}
|
}
|
|
function replaceWithPrettyPrintedHtml() {
|
var newContent = prettyPrintingJob.prettyPrintedHtml;
|
if (!newContent) { return; }
|
var cs = prettyPrintingJob.sourceNode;
|
|
// push the prettified html back into the tag.
|
if (!isRawContent(cs)) {
|
// just replace the old html with the new
|
cs.innerHTML = newContent;
|
} else {
|
// we need to change the tag to a <pre> since <xmp>s do not allow
|
// embedded tags such as the span tags used to attach styles to
|
// sections of source code.
|
var pre = document.createElement('PRE');
|
for (var i = 0; i < cs.attributes.length; ++i) {
|
var a = cs.attributes[i];
|
if (a.specified) {
|
var aname = a.name.toLowerCase();
|
if (aname === 'class') {
|
pre.className = a.value; // For IE 6
|
} else {
|
pre.setAttribute(a.name, a.value);
|
}
|
}
|
}
|
pre.innerHTML = newContent;
|
|
// remove the old
|
cs.parentNode.replaceChild(pre, cs);
|
cs = pre;
|
}
|
|
// Replace <br>s with line-feeds so that copying and pasting works
|
// on IE 6.
|
// Doing this on other browsers breaks lots of stuff since \r\n is
|
// treated as two newlines on Firefox, and doing this also slows
|
// down rendering.
|
if (isIE678 && cs.tagName === 'PRE') {
|
var lineBreaks = cs.getElementsByTagName('br');
|
for (var j = lineBreaks.length; --j >= 0;) {
|
var lineBreak = lineBreaks[j];
|
lineBreak.parentNode.replaceChild(
|
document.createTextNode(ieNewline), lineBreak);
|
}
|
}
|
}
|
|
doWork();
|
}
|
|
window['PR_normalizedHtml'] = normalizedHtml;
|
window['prettyPrintOne'] = prettyPrintOne;
|
window['prettyPrint'] = prettyPrint;
|
window['PR'] = {
|
'combinePrefixPatterns': combinePrefixPatterns,
|
'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
|
};
|
})();
|
