From 922d7f6c96f81a33538900f8a8992a5b6f640874 Mon Sep 17 00:00:00 2001
From: crupest <crupest@outlook.com>
Date: Thu, 23 Apr 2020 02:00:05 +0800
Subject: ...

---
 src/win/graph/direct/text_layout.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'src/win/graph')

diff --git a/src/win/graph/direct/text_layout.cpp b/src/win/graph/direct/text_layout.cpp
index f582dd0a..4a742694 100644
--- a/src/win/graph/direct/text_layout.cpp
+++ b/src/win/graph/direct/text_layout.cpp
@@ -66,7 +66,13 @@ Rect DWriteTextLayout::GetTextBounds() {
   return Rect{metrics.left, metrics.top, metrics.width, metrics.height};
 }
 
-std::vector<Rect> DWriteTextLayout::TextRangeRect(const TextRange& text_range) {
+std::vector<Rect> DWriteTextLayout::TextRangeRect(
+    const TextRange& text_range_arg) {
+  if (text_range_arg.count == 0) {
+    return {};
+  }
+  const auto text_range = text_range_arg.Normalize();
+
   // TODO: This can be faster with one iteration.
   const int start_index =
       IndexUtf8ToUtf16(text_, static_cast<int>(text_range.position), w_text_);
-- 
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