Mode Behaviours

lib/ace/editor.js

@@ -412,7 +412,7 @@ var Editor =function(renderer, session) {
         var mode = session.getMode();
 
         var cursor = this.getCursorPosition();
-        var transform = mode.transformInput(session.getState(cursor.row), this, session, text);
+        var transform = mode.transformInsert(session.getState(cursor.row), this, session, text);
         
         if (transform)
             text = transform.text;

lib/ace/mode/text.js

@@ -179,11 +179,70 @@ var Mode = function() {
         return defaultHandler ? defaultHandler.apply(this, args) : undefined;
     };
     
-    this.transformInput = function(state, editor, session, text) {
+    this.addBehaviour = function (name, insert, remove) {
+        if (this.$behaviours === undefined) {
+            this.$behaviours = {};
+        }
+        this.$behaviours[name] = {
+            insert: insert,
+            remove: remove
+        };
+    }
+    
+    this.removeBehaviour = function (name) {
+        if (this.$behaviours && this.$behaviours[name]) {
+            delete this.$behaviours[name];
+        }
+    }
+    
+    this.inheritBehaviours = function (mode) {
+        if (typeof mode === "function") {
+            var behaviours = new mode().getBehaviours();
+        } else {
+            var behaviours = mode.getBehaviours();
+        }
+        for (var key in behaviours) {
+            if (behaviours.hasOwnProperty(key)) {
+                this.addBehaviour(key, behaviours[key].insert, behaviours[key].remove);
+            }
+        }
+    }
+    
+    this.getBehaviours = function (filter) {
+        if (!filter) {
+            return this.$behaviours;
+        } else {
+            var ret = {}
+            for (var i = 0; i < filter.length; i++) {
+                if (this.$behaviours[filter[i]]) {
+                    ret[filter[i]] = this.$behaviours[filter[i]];
+                }
+            }
+            return ret;
+        }
+    }
+    
+    this.transformInsert = function(state, editor, session, text) {
+        for (var key in this.$behaviours) {
+            if (this.$behaviours.hasOwnProperty(key)) {
+                var ret = this.$behaviours[key].insert.apply(this, arguments);
+                if (ret !== false) {
+                    return ret;
+                }
+            }
+        }
         return false;
     };
     
     this.transformRemove = function(state, editor, session, range) {
+        for (var key in this.$behaviours) {
+            if (this.$behaviours.hasOwnProperty(key)) {
+                var ret = this.$behaviours[key].remove.apply(this, arguments);
+                if (ret !== false) {
+                    return ret;
+                }
+            }
+        }
         return range;
     };