commit | 13bade5077c754d3d42183606772a060f54cbe29 | [log] [tgz] |
---|---|---|
author | Javier Fernández García-Boente <jfernandez@igalia.com> | Wed Dec 02 14:22:12 2020 |
committer | Blink WPT Bot <blink-w3c-test-autoroller@chromium.org> | Wed Dec 02 14:40:36 2020 |
tree | dafbf04753650434e347880a90ca0ede93cde553 | |
parent | 1562100299e04d7550e1eb03073caa5ddb2b9ec2 [diff] |
Adjust the part_start when the ShapeResultView is RTL When creating a new ShapeResultView under RTL mode, the segments process in the ShapeResultView::AddSegments are passed in reverse order. This implies that the in case of multiple parts, the first RunInfoPart may have an offset_ bigger than the start_index_. When creating a new ShapeResultView instance from the one described above as source, like we do in the NGLineBreaker::TruncateLineEndResult, we will use the source's run that were placed in reverse order. We are determining the part_start of this first RunInfoPart for the new result based on the the start_index_ of the source's first run. We'll then calculate the run_start based on this part_start value, subtracting the above mentioned run's offset_. However, as we stated before, in case of a source result under RTL and multiple results, this offset_ value will be greater than the start_index_, leading to a possible arithmetic overflow when computing the run_start value. Bug: 1152387 Change-Id: Ic69740497543b1d2d4dd8bf20d3f1b6c5de46bcc Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2567215 Commit-Queue: Javier Fernandez <jfernandez@igalia.com> Reviewed-by: Koji Ishii <kojii@chromium.org> Cr-Commit-Position: refs/heads/master@{#832795}
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