From bbe4afecf6a56f4bdaaafe083a3bf67191fd9cde Mon Sep 17 00:00:00 2001
From: Alex Yatskov <alex@foosoft.net>
Date: Thu, 6 Apr 2017 21:07:55 -0700
Subject: [PATCH] wip

---
 ext/fg/js/util.js       |  8 ++------
 ext/mixed/js/display.js |  4 ++--
 ext/mixed/js/util.js    | 14 ++++++++++++++
 3 files changed, 18 insertions(+), 8 deletions(-)

diff --git a/ext/fg/js/util.js b/ext/fg/js/util.js
index a1bce660..59060221 100644
--- a/ext/fg/js/util.js
+++ b/ext/fg/js/util.js
@@ -205,14 +205,10 @@ function docClozeExtract(source, extent) {
     }
 
     const sentence = content.substring(startPos, endPos);
-    const clozePrefix = sentence.substring(0, position - startPos);
-    const clozeBody = source.text();
-    const clozeSuffix = sentence.substring(position - startPos + clozeBody.length);
+    const padding = sentence.length - sentence.replace(/^\s+/, '');
 
     return {
         sentence: sentence.trim(),
-        prefix: clozePrefix.trim(),
-        body: clozeBody.trim(),
-        suffix: clozeSuffix.trim()
+        offset: position - startPos - padding
     };
 }
diff --git a/ext/mixed/js/display.js b/ext/mixed/js/display.js
index f5ad4849..e77ca7da 100644
--- a/ext/mixed/js/display.js
+++ b/ext/mixed/js/display.js
@@ -74,7 +74,7 @@ class Display {
 
         if (context) {
             for (const definition of definitions) {
-                definition.cloze = context.cloze;
+                definition.cloze = clozeBuild(context.cloze);
                 definition.url = context.url;
             }
         }
@@ -108,7 +108,7 @@ class Display {
 
         if (context) {
             for (const definition of definitions) {
-                definition.cloze = context.cloze;
+                definition.cloze = clozeBuild(context.cloze);
                 definition.url = context.url;
             }
         }
diff --git a/ext/mixed/js/util.js b/ext/mixed/js/util.js
index c05fb679..aeeb830e 100644
--- a/ext/mixed/js/util.js
+++ b/ext/mixed/js/util.js
@@ -17,6 +17,20 @@
  */
 
 
+/*
+ * Cloze
+ */
+
+function clozeBuild(sentence, offset, source) {
+    return {
+        sentence: sentence.trim(),
+        prefix: sentence.substring(0, offset).trim(),
+        body: source.trim(),
+        suffix: sentence.substring(offset + source.length).trim()
+    };
+}
+
+
 /*
  * Audio
  */