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-rw-r--r--layout/generic/nsTextFrame.cpp6
1 files changed, 5 insertions, 1 deletions
diff --git a/layout/generic/nsTextFrame.cpp b/layout/generic/nsTextFrame.cpp
index b9848bcf1..00c0016fd 100644
--- a/layout/generic/nsTextFrame.cpp
+++ b/layout/generic/nsTextFrame.cpp
@@ -9751,9 +9751,13 @@ nsTextFrame::GetRenderedText(uint32_t aStartOffset,
startOffset = aStartOffset;
endOffset = std::min<uint32_t>(INT32_MAX, aEndOffset);
}
+
+ // If startOffset and/or endOffset are inside of trimmedOffsets' range,
+ // then clamp the edges of trimmedOffsets accordingly.
+ int32_t origTrimmedOffsetsEnd = trimmedOffsets.GetEnd();
trimmedOffsets.mStart = std::max<uint32_t>(trimmedOffsets.mStart,
startOffset);
- trimmedOffsets.mLength = std::min<uint32_t>(trimmedOffsets.GetEnd(),
+ trimmedOffsets.mLength = std::min<uint32_t>(origTrimmedOffsetsEnd,
endOffset) - trimmedOffsets.mStart;
if (trimmedOffsets.mLength <= 0) {
offsetInRenderedString = nextOffsetInRenderedString;