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@mattkae mattkae commented Jul 24, 2025

What's new?

This pull request removes the implicit view assumption from the clipboard on the win32 platform.

  • Implemented Clipboard.getDataFromView and Clipboard.hasStringsOnView
  • Modified Clipboard.setData, but it is backwards compatible
  • Deprecated Clipboard.getData and Clipboard.hasStrings
  • Wrote tests for the win32 platform
  • Updated the dart files that rely on this functionality

Pre-launch Checklist

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

@github-actions github-actions bot added a: text input Entering text in a text field or keyboard related problems framework flutter/packages/flutter repository. See also f: labels. engine flutter/engine related. See also e: labels. f: material design flutter/packages/flutter/material repository. f: scrolling Viewports, list views, slivers, etc. f: cupertino flutter/packages/flutter/cupertino repository platform-windows Building on or for Windows specifically a: desktop Running on desktop labels Jul 24, 2025
@mattkae mattkae requested a review from loic-sharma July 28, 2025 19:02
@mattkae mattkae marked this pull request as ready for review July 28, 2025 19:02
@mattkae mattkae requested a review from robert-ancell July 28, 2025 19:04
@mattkae mattkae changed the title Migrating the clip board over to multi view Migrating the clip board over to multi view for win32 Jul 28, 2025
@mattkae mattkae requested a review from knopp July 29, 2025 13:36
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The Clipboard.getData and Clipboard.setData methods are very commonly used (example). Deprecating these methods would be a significant shift.

From some quick research, it's not clear to me that this deprecation is strictly necessary to support Windows clipboard with multiple windows. I suspect that the HWND that owns the clipboard might not need to be the window that initiated the clipboard action. I suspect that instead Flutter Windows could use a shared HWND as the clipboard owner.

For Flutter Window's task runner, we create a shared message-only HWND here. Could we use a similar approach for the clipboard?

@dkwingsmt dkwingsmt removed f: material design flutter/packages/flutter/material repository. f: cupertino flutter/packages/flutter/cupertino repository labels Jul 30, 2025
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mattkae commented Jul 31, 2025

Closed in favor of #173076

@mattkae mattkae closed this Jul 31, 2025
@mattkae mattkae deleted the multi-view-clipboard branch July 31, 2025 19:54
github-merge-queue bot pushed a commit that referenced this pull request Aug 4, 2025
… of the implicit view (#173076)

alternative to #172719

## What's new?
This pull request removes the implicit view assumption from the
clipboard on the win32 platform.

To fix it, we create a read-only "null" window handle that we can use to
do clipboard things with.

I updated the tests to reflect the fact that a view is no longer needed

## 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], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
- [x] I listed at least one issue that this PR fixes in the description
above.
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] I followed the [breaking change policy] and added [Data Driven
Fixes] where supported.
- [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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danilozhang pushed a commit to danilozhang/flutter that referenced this pull request Aug 6, 2025
… of the implicit view (flutter#173076)

alternative to flutter#172719

## What's new?
This pull request removes the implicit view assumption from the
clipboard on the win32 platform.

To fix it, we create a read-only "null" window handle that we can use to
do clipboard things with.

I updated the tests to reflect the fact that a view is no longer needed

## 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], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
- [x] I listed at least one issue that this PR fixes in the description
above.
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] I followed the [breaking change policy] and added [Data Driven
Fixes] where supported.
- [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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ksokolovskyi pushed a commit to ksokolovskyi/flutter that referenced this pull request Aug 19, 2025
… of the implicit view (flutter#173076)

alternative to flutter#172719

## What's new?
This pull request removes the implicit view assumption from the
clipboard on the win32 platform.

To fix it, we create a read-only "null" window handle that we can use to
do clipboard things with.

I updated the tests to reflect the fact that a view is no longer needed

## 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], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
- [x] I listed at least one issue that this PR fixes in the description
above.
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] I followed the [breaking change policy] and added [Data Driven
Fixes] where supported.
- [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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mboetger pushed a commit to mboetger/flutter that referenced this pull request Sep 18, 2025
… of the implicit view (flutter#173076)

alternative to flutter#172719

## What's new?
This pull request removes the implicit view assumption from the
clipboard on the win32 platform.

To fix it, we create a read-only "null" window handle that we can use to
do clipboard things with.

I updated the tests to reflect the fact that a view is no longer needed

## 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], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
- [x] I listed at least one issue that this PR fixes in the description
above.
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] I followed the [breaking change policy] and added [Data Driven
Fixes] where supported.
- [x] All existing and new tests are passing.

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

<!-- Links -->
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korca0220 pushed a commit to korca0220/flutter that referenced this pull request Sep 22, 2025
… of the implicit view (flutter#173076)

alternative to flutter#172719

## What's new?
This pull request removes the implicit view assumption from the
clipboard on the win32 platform.

To fix it, we create a read-only "null" window handle that we can use to
do clipboard things with.

I updated the tests to reflect the fact that a view is no longer needed

## 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], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
- [x] I listed at least one issue that this PR fixes in the description
above.
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] I followed the [breaking change policy] and added [Data Driven
Fixes] where supported.
- [x] All existing and new tests are passing.

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

<!-- Links -->
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bufffun pushed a commit to bufffun/flutter that referenced this pull request Oct 3, 2025
… of the implicit view (flutter#173076)

alternative to flutter#172719

## What's new?
This pull request removes the implicit view assumption from the
clipboard on the win32 platform.

To fix it, we create a read-only "null" window handle that we can use to
do clipboard things with.

I updated the tests to reflect the fact that a view is no longer needed

## 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], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
- [x] I listed at least one issue that this PR fixes in the description
above.
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] I followed the [breaking change policy] and added [Data Driven
Fixes] where supported.
- [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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lucaantonelli pushed a commit to lucaantonelli/flutter that referenced this pull request Nov 21, 2025
… of the implicit view (flutter#173076)

alternative to flutter#172719

## What's new?
This pull request removes the implicit view assumption from the
clipboard on the win32 platform.

To fix it, we create a read-only "null" window handle that we can use to
do clipboard things with.

I updated the tests to reflect the fact that a view is no longer needed

## 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], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
- [x] I listed at least one issue that this PR fixes in the description
above.
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] I followed the [breaking change policy] and added [Data Driven
Fixes] where supported.
- [x] All existing and new tests are passing.

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

<!-- Links -->
[Contributor Guide]:
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