1 files changed, 10 insertions, 2 deletions
diff --git a/src/client/textanalysis.js b/src/client/textanalysis.js
index 67778b81..12e6e0de 100644
--- a/src/client/textanalysis.js
+++ b/src/client/textanalysis.js
@@ -179,8 +179,11 @@ function tokenize(text, node_token, quote)
  *  marks).
  *
  */
-var textAnalyser = function (newtext, finalize) {
-    var sentence,
+var textAnalyser = function (spec) {
+    var newtext = spec.sentence,
+        finalize = spec.finalize,
+        cursor = spec.cursor,
+        sentence,
         token_set_new_node_names = [], // token set representing new node names
         token_set_new_link_names = [], // token set representing new link names
         linkindex = 0,
@@ -204,6 +207,11 @@ var textAnalyser = function (newtext, finalize) {
         links = [],
         ret = model_diff.new_topo_diff();
 
+    util.assert(spec.sentence !== undefined &&
+                spec.finalize !== undefined &&
+                spec.cursor !== undefined,
+                "bad input");
+
     function __addNode(name, type) {
         if (type === undefined) {
             console.log('bug: textanalyser.addNode of type undefined');