[macOS] Prepare TextInputPlugin for multi-view #164014

knopp · 2025-02-24T17:31:21Z

Notable changes:

FlutterTextInputPlugin is now owned by FlutterEngine.
FlutterTextInputPlugin is only associated with a FlutterViewController while having active IME connection.
Changed private state of TextInputPlugin from properties to ivars. There is no need for these to be properties, and the state was accessed both as ivars and properties which seemed inconsistent.
Updated test to reflect the changes

I've also tested everything including voice-over to make sure accessibility didn't regress.

Pre-launch Checklist

I read the Contributor Guide and followed the process outlined there for submitting PRs.
I read the Tree Hygiene wiki page, which explains my responsibilities.
I read and followed the Flutter Style Guide, including Features we expect every widget to implement.
I signed the CLA.
I listed at least one issue that this PR fixes in the description above.
I updated/added relevant documentation (doc comments with ///).
I added new tests to check the change I am making, or this PR is test-exempt.
I followed the breaking change policy and added Data Driven Fixes where supported.
All existing and new tests are passing.

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

chinmaygarde · 2025-03-10T18:06:59Z

Ping @dkwingsmt or @justinmc perhaps?

dkwingsmt

LGTM, thank you!

dkwingsmt · 2025-03-11T05:46:51Z

engine/src/flutter/shell/platform/darwin/macos/framework/Source/FlutterTextInputPlugin.mm

      self.automaticTextCompletionEnabled = EnableAutocomplete(config);
      if (@available(macOS 11.0, *)) {
        self.contentType = GetTextContentType(config);
      }

      _activeModel = std::make_unique<flutter::TextInputModel>();
+      NSNumber* viewId = config[kViewId];


Does it break existing apps that create such messages manually and doesn't add view ID? Should it default to implicit view ID?

Are any applications out there creating the messages manually instead of using the text input client, which always puts the viewId? I'd hope not.

dkwingsmt · 2025-03-11T06:07:05Z

engine/src/flutter/shell/platform/darwin/macos/framework/Source/FlutterViewController.mm

+// Returns the text input plugin associated with this view controller.
+// This method only returns non nil instance if the text input plugin has active
+// client with viewId matching this controller's view identifier.
+- (FlutterTextInputPlugin*)textInputPlugin {


I'm concerned that this name might cause trouble if a maintainer does not read the doc carefully. Shall we rename it to something like matchingTextInputPlugin?

That's a good point. I'll rename it to activeTextInputPlugin.

…tter#164014)

github-actions bot added engine flutter/engine repository. See also e: labels. a: desktop Running on desktop platform-macos labels Feb 24, 2025

knopp force-pushed the multiview_text_input_plugin branch 2 times, most recently from 4b578b3 to 429fc13 Compare March 1, 2025 12:21

knopp requested a review from cbracken March 1, 2025 12:26

knopp changed the title ~~WIP: [macOS] Prepare TextInputPlugin for multi-view~~ [macOS] Prepare TextInputPlugin for multi-view Mar 1, 2025

knopp requested a review from dkwingsmt March 1, 2025 12:27

dkwingsmt approved these changes Mar 11, 2025

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knopp added 3 commits March 11, 2025 10:33

[macOS] Prepare TextInputPlugin for multi-view

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Rename to activeTextInputPlugin

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knopp force-pushed the multiview_text_input_plugin branch from 429fc13 to c9b723b Compare March 11, 2025 10:04

knopp added this pull request to the merge queue Mar 11, 2025

Merged via the queue into flutter:master with commit 91d195f Mar 11, 2025
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knopp deleted the multiview_text_input_plugin branch March 11, 2025 11:39

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Roll Flutter from b16430b2fd57 to b60d60a16673 (20 revisions) flutter/packages#8846

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Roll Flutter from b16430b2fd57 to 39dc5717d599 (21 revisions) flutter/packages#8847

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Roll Flutter from b16430b2fd57 to 7bf883711647 (22 revisions) flutter/packages#8848

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Roll Flutter from b16430b2fd57 to 463e7516406b (24 revisions) flutter/packages#8850

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knopp mentioned this pull request May 26, 2025

TextInput.attach causes crash on macOS with Flutter 3.32.0 #169204

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