From 1d9e3f431c503711cae266f79b967195f456133d Mon Sep 17 00:00:00 2001
From: Daniel Felder <daniel@felder.ws>
Date: Tue, 19 Aug 2014 22:33:09 +0200
Subject: [PATCH] Latex mode for ace has new syntax highlighting

This is an update to the latest version.
---
 services/web/public/js/ace/mode-latex.js | 56 +++++++++++++++++++-----
 1 file changed, 44 insertions(+), 12 deletions(-)

diff --git a/services/web/public/js/ace/mode-latex.js b/services/web/public/js/ace/mode-latex.js
index 57d60db389..dd8194c1cd 100644
--- a/services/web/public/js/ace/mode-latex.js
+++ b/services/web/public/js/ace/mode-latex.js
@@ -4,11 +4,24 @@ ace.define("ace/mode/latex_highlight_rules",["require","exports","module","ace/l
 var oop = require("../lib/oop");
 var TextHighlightRules = require("./text_highlight_rules").TextHighlightRules;
 
-var LatexHighlightRules = function() {   
+var LatexHighlightRules = function() {  
+
     this.$rules = {
         "start" : [{
-            token : "keyword",
-            regex : "\\\\(?:[^a-zA-Z]|[a-zA-Z]+)"
+            token : "comment",
+            regex : "%.*$"
+        }, {
+            token : ["keyword", "lparen", "variable.parameter", "rparen", "lparen", "storage.type", "rparen"],
+            regex : "(\\\\(?:documentclass|usepackage|input))(?:(\\[)([^\\]]*)(\\]))?({)([^}]*)(})"
+        }, {
+            token : ["keyword","lparen", "variable.parameter", "rparen"],
+            regex : "(\\\\label)(?:({)([^}]*)(}))?"
+        }, {
+            token : ["storage.type", "lparen", "variable.parameter", "rparen"],
+            regex : "(\\\\(?:begin|end))({)(\\w*)(})"
+        }, {
+            token : "storage.type",
+            regex : "\\\\[a-zA-Z]+"
         }, {
             token : "lparen",
             regex : "[[({]"
@@ -16,15 +29,33 @@ var LatexHighlightRules = function() {
             token : "rparen",
             regex : "[\\])}]"
         }, {
-            token : "string",
-            regex : "\\$(?:(?:\\\\.)|(?:[^\\$\\\\]))*?\\$"
+            token : "constant.character.escape",
+            regex : "\\\\[^a-zA-Z]?"
         }, {
+            token : "string",
+            regex : "\\${1,2}",
+            next  : "equation"
+        }],
+        "equation" : [{
             token : "comment",
             regex : "%.*$"
+        }, {
+            token : "string",
+            regex : "\\${1,2}",
+            next  : "start"
+        }, {
+            token : "constant.character.escape",
+            regex : "\\\\(?:[^a-zA-Z]|[a-zA-Z]+)"
+        }, {
+            token : "error", 
+            regex : "^\\s*$", 
+            next : "start" 
+        }, {
+            defaultToken : "string"
         }]
+
     };
 };
-
 oop.inherits(LatexHighlightRules, TextHighlightRules);
 
 exports.LatexHighlightRules = LatexHighlightRules;
@@ -45,7 +76,7 @@ oop.inherits(FoldMode, BaseFoldMode);
 
 (function() {
 
-    this.foldingStartMarker = /^\s*\\(begin)|(section|subsection)\b|{\s*$/;
+    this.foldingStartMarker = /^\s*\\(begin)|(section|subsection|paragraph)\b|{\s*$/;
     this.foldingStopMarker = /^\s*\\(end)\b|^\s*}/;
 
     this.getFoldWidgetRange = function(session, foldStyle, row) {
@@ -77,7 +108,7 @@ oop.inherits(FoldMode, BaseFoldMode);
 
         var stream = new TokenIterator(session, row, column);
         var token = stream.getCurrentToken();
-        if (!token || token.type !== "keyword")
+        if (!token || !(token.type == "storage.type" || token.type == "constant.character.escape"))
             return;
 
         var val = token.value;
@@ -99,7 +130,7 @@ oop.inherits(FoldMode, BaseFoldMode);
 
         stream.step = dir === -1 ? stream.stepBackward : stream.stepForward;
         while(token = stream.step()) {
-            if (token.type !== "keyword")
+            if (!token || !(token.type == "storage.type" || token.type == "constant.character.escape"))
                 continue;
             var level = keywords[token.value];
             if (!level)
@@ -122,11 +153,11 @@ oop.inherits(FoldMode, BaseFoldMode);
     };
 
     this.latexSection = function(session, row, column) {
-        var keywords = ["\\subsection", "\\section", "\\begin", "\\end"];
+        var keywords = ["\\subsection", "\\section", "\\begin", "\\end", "\\paragraph"];
 
         var stream = new TokenIterator(session, row, column);
         var token = stream.getCurrentToken();
-        if (!token || token.type != "keyword")
+        if (!token || token.type != "storage.type")
             return;
 
         var startLevel = keywords.indexOf(token.value);
@@ -134,7 +165,7 @@ oop.inherits(FoldMode, BaseFoldMode);
         var endRow = row;
 
         while(token = stream.stepForward()) {
-            if (token.type !== "keyword")
+            if (token.type !== "storage.type")
                 continue;
             var level = keywords.indexOf(token.value);
 
@@ -181,6 +212,7 @@ oop.inherits(Mode, TextMode);
 
 (function() {
     this.type = "text";
+    
     this.lineCommentStart = "%";
 
     this.$id = "ace/mode/latex";