From cd198620a44576afb0f325abd58d503eab65bf32 Mon Sep 17 00:00:00 2001
From: John MacFarlane <jgm@berkeley.edu>
Date: Sat, 4 Oct 2014 17:15:52 -0700
Subject: Further emph fallback optimizations.

---
 js/stmd.js | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

(limited to 'js')

diff --git a/js/stmd.js b/js/stmd.js
index 9a3a8c7..e227578 100755
--- a/js/stmd.js
+++ b/js/stmd.js
@@ -2486,6 +2486,8 @@
         var delims_to_match = numdelims;
 
         var current = [];
+        var firstend;
+        var firstpos;
         var state = 0;
         var can_close = false;
         var can_open = false;
@@ -2506,10 +2508,14 @@
                 } else if (numclosedelims >= 2 && delims_to_match >= 2) {
                     delims_to_match -= 2;
                     this.pos += 2;
+                    firstend = current.length;
+                    firstpos = this.pos;
                     current = [{t: 'Strong', c: current}];
                 } else if (numclosedelims >= 1 && delims_to_match >= 1) {
                     delims_to_match -= 1;
                     this.pos += 1;
+                    firstend = current.length;
+                    firstpos = this.pos;
                     current = [{t: 'Emph', c: current}];
                 } else {
                     if (!(this.parseInline(current,true))) {
@@ -2526,13 +2532,19 @@
         }
 
         // we didn't match emphasis: fallback
-        this.pos = startpos + 1;
+        inlines.push(Str(this.subject.slice(startpos,
+                                            startpos + delims_to_match)));
+        if (delims_to_match < numdelims) {
+            Array.prototype.push.apply(inlines, current.slice(0,firstend));
+            this.pos = firstpos;
+        } else { // delims_to_match === numdelims
+            this.pos = startpos + delims_to_match;
+        }
+
         if (last_emphasis_closer) {
             this.last_emphasis_closer[c] = last_emphasis_closer;
         }
-        inlines.push(Str(c));
         return true;
-
     };
 
     // Attempt to parse link title (sans quotes), returning the string
-- 
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