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When composing with the IME in a text edit, we should add the start of the composition range to the in-composition cursor_pos rather than its extent. When using extent, the cursor position would always be outside of the composition range, resulting in the linked bug. Add a test to check cursor position.

flutter/flutter#123749

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@Renzo-Olivares Renzo-Olivares left a comment

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LGTM

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@Renzo-Olivares Renzo-Olivares left a comment

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LGTM

auto encoded_arguments = EncodedEditingState("\n", TextRange(1));
auto update_state_message = codec.EncodeMethodCall(
{"TextInputClient.updateEditingState", std::move(encoded_arguments)});
{kUpdateEditingStateMethod, std::move(encoded_arguments)});
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@cbracken cbracken Sep 12, 2023

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Thanks for cleaning this up while you're in here!

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LGTM stamp from a Japanese personal seal

@yaakovschectman yaakovschectman merged commit 1017f8e into flutter:main Sep 13, 2023
@yaakovschectman yaakovschectman deleted the pinyin branch September 13, 2023 20:18
engine-flutter-autoroll added a commit to engine-flutter-autoroll/flutter that referenced this pull request Sep 13, 2023
engine-flutter-autoroll added a commit to engine-flutter-autoroll/flutter that referenced this pull request Sep 13, 2023
auto-submit bot pushed a commit to flutter/flutter that referenced this pull request Sep 13, 2023
Mairramer pushed a commit to Mairramer/flutter that referenced this pull request Oct 10, 2023
harryterkelsen pushed a commit that referenced this pull request Oct 23, 2023
When composing with the IME in a text edit, we should add the `start` of
the composition range to the in-composition `cursor_pos` rather than its
`extent`. When using `extent`, the cursor position would always be
outside of the composition range, resulting in the linked bug. Add a
test to check cursor position.

flutter/flutter#123749

## Pre-launch Checklist

- [x] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [x] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [x] I read and followed the [Flutter Style Guide] and the [C++,
Objective-C, Java style guides].
- [x] I listed at least one issue that this PR fixes in the description
above.
- [x] I added new tests to check the change I am making or feature I am
adding, or the PR is [test-exempt]. See [testing the engine] for
instructions on writing and running engine tests.
- [x] I updated/added relevant documentation (doc comments with `///`).
- [ ] I signed the [CLA].
- [x] All existing and new tests are passing.

If you need help, consider asking for advice on the #hackers-new channel
on [Discord].

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