Added coding style modes to SimpleMDE (#3286)

* Added coding style modes to SimpleMDE

* Moved the CodeMirror addon from simplemd to codemirror directory

public/plugins/codemirror-5.17.0/mode/jinja2/jinja2.js

@@ -0,0 +1,142 @@
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: http://codemirror.net/LICENSE
+
+(function(mod) {
+  if (typeof exports == "object" && typeof module == "object") // CommonJS
+    mod(require("../../lib/codemirror"));
+  else if (typeof define == "function" && define.amd) // AMD
+    define(["../../lib/codemirror"], mod);
+  else // Plain browser env
+    mod(CodeMirror);
+})(function(CodeMirror) {
+  "use strict";
+
+  CodeMirror.defineMode("jinja2", function() {
+    var keywords = ["and", "as", "block", "endblock", "by", "cycle", "debug", "else", "elif",
+      "extends", "filter", "endfilter", "firstof", "for",
+      "endfor", "if", "endif", "ifchanged", "endifchanged",
+      "ifequal", "endifequal", "ifnotequal",
+      "endifnotequal", "in", "include", "load", "not", "now", "or",
+      "parsed", "regroup", "reversed", "spaceless",
+      "endspaceless", "ssi", "templatetag", "openblock",
+      "closeblock", "openvariable", "closevariable",
+      "openbrace", "closebrace", "opencomment",
+      "closecomment", "widthratio", "url", "with", "endwith",
+      "get_current_language", "trans", "endtrans", "noop", "blocktrans",
+      "endblocktrans", "get_available_languages",
+      "get_current_language_bidi", "plural"],
+    operator = /^[+\-*&%=<>!?|~^]/,
+    sign = /^[:\[\(\{]/,
+    atom = ["true", "false"],
+    number = /^(\d[+\-\*\/])?\d+(\.\d+)?/;
+
+    keywords = new RegExp("((" + keywords.join(")|(") + "))\\b");
+    atom = new RegExp("((" + atom.join(")|(") + "))\\b");
+
+    function tokenBase (stream, state) {
+      var ch = stream.peek();
+
+      //Comment
+      if (state.incomment) {
+        if(!stream.skipTo("#}")) {
+          stream.skipToEnd();
+        } else {
+          stream.eatWhile(/\#|}/);
+          state.incomment = false;
+        }
+        return "comment";
+      //Tag
+      } else if (state.intag) {
+        //After operator
+        if(state.operator) {
+          state.operator = false;
+          if(stream.match(atom)) {
+            return "atom";
+          }
+          if(stream.match(number)) {
+            return "number";
+          }
+        }
+        //After sign
+        if(state.sign) {
+          state.sign = false;
+          if(stream.match(atom)) {
+            return "atom";
+          }
+          if(stream.match(number)) {
+            return "number";
+          }
+        }
+
+        if(state.instring) {
+          if(ch == state.instring) {
+            state.instring = false;
+          }
+          stream.next();
+          return "string";
+        } else if(ch == "'" || ch == '"') {
+          state.instring = ch;
+          stream.next();
+          return "string";
+        } else if(stream.match(state.intag + "}") || stream.eat("-") && stream.match(state.intag + "}")) {
+          state.intag = false;
+          return "tag";
+        } else if(stream.match(operator)) {
+          state.operator = true;
+          return "operator";
+        } else if(stream.match(sign)) {
+          state.sign = true;
+        } else {
+          if(stream.eat(" ") || stream.sol()) {
+            if(stream.match(keywords)) {
+              return "keyword";
+            }
+            if(stream.match(atom)) {
+              return "atom";
+            }
+            if(stream.match(number)) {
+              return "number";
+            }
+            if(stream.sol()) {
+              stream.next();
+            }
+          } else {
+            stream.next();
+          }
+
+        }
+        return "variable";
+      } else if (stream.eat("{")) {
+        if (ch = stream.eat("#")) {
+          state.incomment = true;
+          if(!stream.skipTo("#}")) {
+            stream.skipToEnd();
+          } else {
+            stream.eatWhile(/\#|}/);
+            state.incomment = false;
+          }
+          return "comment";
+        //Open tag
+        } else if (ch = stream.eat(/\{|%/)) {
+          //Cache close tag
+          state.intag = ch;
+          if(ch == "{") {
+            state.intag = "}";
+          }
+          stream.eat("-");
+          return "tag";
+        }
+      }
+      stream.next();
+    };
+
+    return {
+      startState: function () {
+        return {tokenize: tokenBase};
+      },
+      token: function (stream, state) {
+        return state.tokenize(stream, state);
+      }
+    };
+  });
+});