From 9e0f8a10647ecd4512b10fabc3469c9adc683fca Mon Sep 17 00:00:00 2001
From: "Tate, Hongliang Tian" <tatetian@gmail.com>
Date: Wed, 11 Mar 2015 13:13:45 +0800
Subject: [PATCH] Add support for Tex-style comment
---
src/Lexer.js | 28 ++++++++++++++++++++++------
static/test-suite.html | 3 ++-
2 files changed, 24 insertions(+), 7 deletions(-)
diff --git a/src/Lexer.js b/src/Lexer.js
index 31a9d46..15525b0 100644
--- a/src/Lexer.js
+++ b/src/Lexer.js
@@ -63,16 +63,32 @@ var atomRegex = {
open: /^\{/,
close: /^\}/,
ordinary: /^[^\\{}$&#%_\s]+/,
- math: mathPattern ///^\$.*\$/
+ math: mathPattern ///^\$.*\$/,
};
-var whitespaceRegex = /^\s*/;
+var commentRegex = /^%.*/
+var whitespaceRegex = /^\s+/;
+
+Lexer.prototype._skip = function(len) {
+ this._pos += len;
+ this._remain = this._remain.slice(len);
+}
/* Get the next atom */
Lexer.prototype._next = function() {
- // Skip whitespace (zero or more)
- var whitespaceLen = whitespaceRegex.exec(this._remain)[0].length;
- this._pos += whitespaceLen;
- this._remain = this._remain.slice(whitespaceLen);
+ while (1) {
+ // Skip whitespace (one or more)
+ var whitespaceMatch = whitespaceRegex.exec(this._remain);
+ if (whitespaceMatch) {
+ var whitespaceLen = whitespaceMatch[0].length;
+ this._skip(whitespaceLen);
+ }
+
+ // Skip comment
+ var commentMatch = commentRegex.exec(this._remain);
+ if (!commentMatch) break;
+ var commentLen = commentMatch[0].length;
+ this._skip(commentLen);
+ }
// Remember the current atom
this._currentAtom = this._nextAtom;
diff --git a/static/test-suite.html b/static/test-suite.html
index 109342b..57bc8be 100644
--- a/static/test-suite.html
+++ b/static/test-suite.html
@@ -104,8 +104,9 @@
\end{algorithmic}
\end{algorithm}
</pre>
- <!-- Chapter 7, Introduction to Algorithms (3rd edition)-->
<pre id="test-examples" style="display:none">
+ % This quicksort algorithm is extracted from Chapter 7, Introduction
+ % to Algorithms (3rd edition)
\begin{algorithm}
\caption{Quicksort}
\begin{algorithmic}
--
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