Fixes crash when double tapping the space bar while the textView was empty. For real this time.

Ignacio Romero Zurbuchen · Ignacio Romero Zurbuchen · commit 61671ffa0d5c · 2016-01-13T15:56:26.000-08:00
diff --git a/Source/SLKTextViewController.m b/Source/SLKTextViewController.m
@@ -1901,12 +1901,18 @@ - (BOOL)textView:(SLKTextView *)textView shouldChangeTextInRange:(NSRange)range
     }
     
     // Detects double spacebar tapping, to replace the default "." insert with a formatting symbol, if needed.
-    if (textView.isFormattingEnabled && range.location > 0 && text.length > 0 && textView.text.length > 1 &&
+    if (textView.isFormattingEnabled && range.location > 0 && text.length > 0 &&
         [[NSCharacterSet whitespaceCharacterSet] characterIsMember:[text characterAtIndex:0]] &&
         [[NSCharacterSet whitespaceCharacterSet] characterIsMember:[textView.text characterAtIndex:range.location - 1]]) {
         
         BOOL shouldChange = YES;
         
+        // Since we are moving 2 characters to the left, we need for to make sure that the string's lenght,
+        // before the caret position, is higher than 2.
+        if ([textView.text substringToIndex:textView.selectedRange.location].length < 2) {
+            return YES;
+        }
+        
         NSRange wordRange = range;
         wordRange.location -= 2; // minus the white space added with the double space bar tapping
         
