first commit

codemirror/mode/stex/stex.js

@@ -0,0 +1,175 @@
+/*
+ * Author: Constantin Jucovschi (c.jucovschi@jacobs-university.de)
+ * Licence: MIT
+ */
+
+CodeMirror.defineMode("stex", function() 
+{    
+    function pushCommand(state, command) {
+	state.cmdState.push(command);
+    }
+
+    function peekCommand(state) { 
+	if (state.cmdState.length>0)
+	    return state.cmdState[state.cmdState.length-1];
+	else
+	    return null;
+    }
+
+    function popCommand(state) {
+	if (state.cmdState.length>0) {
+	    var plug = state.cmdState.pop();
+	    plug.closeBracket();
+	}	    
+    }
+
+    function applyMostPowerful(state) {
+      var context = state.cmdState;
+      for (var i = context.length - 1; i >= 0; i--) {
+	  var plug = context[i];
+	  if (plug.name=="DEFAULT")
+	      continue;
+	  return plug.styleIdentifier();
+      }
+      return null;
+    }
+
+    function addPluginPattern(pluginName, cmdStyle, brackets, styles) {
+	return function () {
+	    this.name=pluginName;
+	    this.bracketNo = 0;
+	    this.style=cmdStyle;
+	    this.styles = styles;
+	    this.brackets = brackets;
+
+	    this.styleIdentifier = function() {
+		if (this.bracketNo<=this.styles.length)
+		    return this.styles[this.bracketNo-1];
+		else
+		    return null;
+	    };
+	    this.openBracket = function() {
+		this.bracketNo++;
+		return "bracket";
+	    };
+	    this.closeBracket = function() {};
+	};
+    }
+
+    var plugins = new Array();
+   
+    plugins["importmodule"] = addPluginPattern("importmodule", "tag", "{[", ["string", "builtin"]);
+    plugins["documentclass"] = addPluginPattern("documentclass", "tag", "{[", ["", "atom"]);
+    plugins["usepackage"] = addPluginPattern("documentclass", "tag", "[", ["atom"]);
+    plugins["begin"] = addPluginPattern("documentclass", "tag", "[", ["atom"]);
+    plugins["end"] = addPluginPattern("documentclass", "tag", "[", ["atom"]);
+
+    plugins["DEFAULT"] = function () {
+	this.name="DEFAULT";
+	this.style="tag";
+
+	this.styleIdentifier = this.openBracket = this.closeBracket = function() {};
+    };
+
+    function setState(state, f) {
+	state.f = f;
+    }
+
+    function normal(source, state) {
+	if (source.match(/^\\[a-zA-Z@]+/)) {
+	    var cmdName = source.current();
+	    cmdName = cmdName.substr(1, cmdName.length-1);
+            var plug;
+            if (plugins.hasOwnProperty(cmdName)) {
+	      plug = plugins[cmdName];
+            } else {
+              plug = plugins["DEFAULT"];
+            }
+	    plug = new plug();
+	    pushCommand(state, plug);
+	    setState(state, beginParams);
+	    return plug.style;
+	}
+
+        // escape characters 
+        if (source.match(/^\\[$&%#{}_]/)) {
+          return "tag";
+        }
+
+        // white space control characters
+        if (source.match(/^\\[,;!\/]/)) {
+          return "tag";
+        }
+
+	var ch = source.next();
+	if (ch == "%") {
+            // special case: % at end of its own line; stay in same state
+            if (!source.eol()) {
+              setState(state, inCComment);
+            }
+	    return "comment";
+	} 
+	else if (ch=='}' || ch==']') {
+	    plug = peekCommand(state);
+	    if (plug) {
+		plug.closeBracket(ch);
+		setState(state, beginParams);
+	    } else
+		return "error";
+	    return "bracket";
+	} else if (ch=='{' || ch=='[') {
+	    plug = plugins["DEFAULT"];	    
+	    plug = new plug();
+	    pushCommand(state, plug);
+	    return "bracket";	    
+	}
+	else if (/\d/.test(ch)) {
+	    source.eatWhile(/[\w.%]/);
+	    return "atom";
+	}
+	else {
+	    source.eatWhile(/[\w-_]/);
+	    return applyMostPowerful(state);
+	}
+    }
+
+    function inCComment(source, state) {
+	source.skipToEnd();
+	setState(state, normal);
+	return "comment";
+    }
+
+    function beginParams(source, state) {
+	var ch = source.peek();
+	if (ch == '{' || ch == '[') {
+	   var lastPlug = peekCommand(state);
+	   lastPlug.openBracket(ch);
+	   source.eat(ch);
+	   setState(state, normal);
+	   return "bracket";
+	}
+	if (/[ \t\r]/.test(ch)) {
+	    source.eat(ch);
+	    return null;
+	}
+	setState(state, normal);
+	lastPlug = peekCommand(state);
+	if (lastPlug) {
+	    popCommand(state);
+	}
+        return normal(source, state);
+    }
+
+    return {
+     startState: function() { return { f:normal, cmdState:[] }; },
+	 copyState: function(s) { return { f: s.f, cmdState: s.cmdState.slice(0, s.cmdState.length) }; },
+	 
+	 token: function(stream, state) {
+	 var t = state.f(stream, state);
+	 return t;
+     }
+ };
+});
+
+CodeMirror.defineMIME("text/x-stex", "stex");
+CodeMirror.defineMIME("text/x-latex", "stex");