1 files changed, 72 insertions, 0 deletions

diff --git a/imports/codemirror/lib/util/multiplex.js b/imports/codemirror/lib/util/multiplex.js
new file mode 100644
index 00000000..822ee62a
--- /dev/null
+++ b/imports/codemirror/lib/util/multiplex.js
@@ -0,0 +1,72 @@
+CodeMirror.multiplexingMode = function(outer /*, others */) {
+  // Others should be {open, close, mode [, delimStyle]} objects
+  var others = Array.prototype.slice.call(arguments, 1);
+  var n_others = others.length;
+
+  return {
+    startState: function() {
+      return {
+        outer: CodeMirror.startState(outer),
+        innerActive: null,
+        inner: null
+      };
+    },
+
+    copyState: function(state) {
+      return {
+        outer: CodeMirror.copyState(outer, state.outer),
+        innerActive: state.innerActive,
+        inner: state.innerActive && CodeMirror.copyState(state.innerActive.mode, state.inner)
+      };
+    },
+
+    token: function(stream, state) {
+      if (!state.innerActive) {
+        for (var i = 0; i < n_others; ++i) {
+          var other = others[i];
+          if (stream.match(other.open)) {
+            state.innerActive = other;
+            state.inner = CodeMirror.startState(other.mode);
+            return other.delimStyle;
+          }
+        }
+        var outerToken = outer.token(stream, state.outer);
+        var cur = stream.current();
+        for (var i = 0; i < n_others; ++i) {
+          var other = others[i], found = cur.indexOf(other.open);
+          if (found > -1) {
+            stream.backUp(cur.length - found);
+            cur = cur.slice(0, found);
+          }
+        }
+        return outerToken;
+      } else {
+        var curInner = state.innerActive;
+        if (stream.match(curInner.close)) {
+          state.innerActive = state.inner = null;
+          return curInner.delimStyle;
+        }
+        var innerToken = curInner.mode.token(stream, state.inner);
+        var cur = stream.current(), found = cur.indexOf(curInner.close);
+        if (found > -1) stream.backUp(cur.length - found);
+        return innerToken;
+      }
+    },
+    
+    indent: function(state, textAfter) {
+      var mode = state.innerActive || outer;
+      if (!mode.indent) return CodeMirror.Pass;
+      return mode.indent(state.innerActive ? state.inner : state.outer, textAfter);
+    },
+
+    compareStates: function(a, b) {
+      if (a.innerActive != b.innerActive) return false;
+      var mode = a.innerActive || outer;
+      if (!mode.compareStates) return CodeMirror.Pass;
+      return mode.compareStates(a.innerActive ? a.inner : a.outer,
+                                b.innerActive ? b.inner : b.outer);
+    },
+
+    electricChars: outer.electricChars
+  };
+};