added completionModifier

allows a highlight rule modify keyword completions

lib/ace/mode/text.js

@@ -368,14 +368,18 @@ var Mode = function() {
     };
 
     this.getCompletions = function(state, session, pos, prefix) {
+        var self = this;
         var keywords = this.$keywordList || this.$createKeywordList();
         return keywords.map(function(word) {
-            return {
+            var r = {
                 name: word,
                 value: word,
                 score: 0,
                 meta: "keyword"
             };
+            return self.$highlightRules.completionModifier ? self.$highlightRules.completionModifier.call(self, r) : r;
+        }).filter(function(value) {
+            return value !== undefined;
         });
     };
 

lib/ace/mode/text_highlight_rules.js

@@ -227,6 +227,14 @@ var TextHighlightRules = function() {
     this.getKeywords = function() {
         return this.$keywords;
     };
+    
+    /**
+     * Function that can be set by HighlightRules to modify a keyword completion.
+     * The function receives {name<string>, value<string>, score<number>, meta<string>}
+     * and should return the same type or undefined to skip adding the result to
+     * the completion list.
+     */
+    this.completionModifier = null;
 
 }).call(TextHighlightRules.prototype);