Reduced number of redraws when selecting text: unhighlight

1 files changed, 10 insertions, 1 deletions

diff --git a/dw/textblock_iterator.cc b/dw/textblock_iterator.cc
index cfd27941..245df374 100644
--- a/dw/textblock_iterator.cc
+++ b/dw/textblock_iterator.cc
@@ -145,6 +145,11 @@ void Textblock::TextblockIterator::unhighlight (int direction,
    if (textblock->hlStart[layer].index > textblock->hlEnd[layer].index)
       return;
 
+   int oldStartIndex = textblock->hlStart[layer].index;
+   int oldStartChar = textblock->hlStart[layer].nChar;
+   int oldEndIndex = textblock->hlEnd[layer].index;
+   int oldEndChar = textblock->hlEnd[layer].nChar;
+
    if (direction == 0) {
       index1 = textblock->hlStart[layer].index;
       index2 = textblock->hlEnd[layer].index;
@@ -160,7 +165,11 @@ void Textblock::TextblockIterator::unhighlight (int direction,
       textblock->hlEnd[layer].nChar = INT_MAX;
    }
 
-   textblock->queueDrawRange (index1, index2);
+   if (oldStartIndex != textblock->hlStart[layer].index ||
+       oldStartChar != textblock->hlStart[layer].nChar ||
+       oldEndIndex != textblock->hlEnd[layer].index ||
+       oldEndChar != textblock->hlEnd[layer].nChar)
+      textblock->queueDrawRange (index1, index2);
 }
 
 void Textblock::TextblockIterator::getAllocation (int start, int end,