commit 62bb11dfc61d7b9af789ffa6d3c4feca8dcfca81
author Joanmarie Diggs <jdiggs@igalia.com> Mon May 29 07:44:25 2023
committer Chromium LUCI CQ <chromium-scoped@luci-project-accounts.iam.gserviceaccount.com> Mon May 29 07:44:25 2023
tree 7c2bbc83ce1d37ab0e768248b2e97e864d9d7a1b
parent ce717231b976859599b034a82de53d6659a142b0

Handle nodeless break opportunities in AXPosition::FromPosition

The accessible text exposed to assistive technologies comes from the
InlineTextBox content; characters representing break opportunities are
excluded.

If the break opportunity has an associated node, such as <wbr>,
AXPosition is able to connect that character's content offsets
with the "ignored" accessibility object, and ensure the text offsets
exposed to ATs correspond to the accessible text. It needs to do the
same for break opportunities which lack an associated node, such as
those inserted at the end of preserved leading spaces.

Create AXPosition::AdjustContentOffsetForNonContiguousMappings which
identifies nodeless break opportunities and adjusts the accessible
content offset accordingly.

AX-Relnotes: Screen readers should no longer present the wrong character
during caret navigation if "white-space: pre-wrap" is applied to an
element with leading spaces.

Bug: 1442835
Change-Id: I914d051b942dcd50de55674816e32cfbf578e5a6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4543184
Reviewed-by: Koji Ishii <kojii@chromium.org>
Commit-Queue: Joanmarie Diggs <jdiggs@igalia.com>
Reviewed-by: Benjamin Beaudry <benjamin.beaudry@microsoft.com>
Cr-Commit-Position: refs/heads/main@{#1150216}