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Add accessibility semantics support to embedder #7891
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chinmaygarde
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Feb 20, 2019
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Some minor nits, but lgtm.
| return false; | ||
| } | ||
| shell_->GetTaskRunners().GetUITaskRunner()->PostTask( | ||
| [engine = shell_->GetEngine(), id, action = std::move(action), |
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Nit: action is just an int32_t. The move is not necessary.
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Done. Nice catch; not sure how many times I had to refresh my mind this was an enum and not some messy struct :)
| } | ||
| shell_->GetTaskRunners().GetUITaskRunner()->PostTask( | ||
| [engine = shell_->GetEngine(), id, action = std::move(action), | ||
| args = std::move(args)] { |
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If you are attempting to prevent a copy of the args vector, then this code does not avoid the same. You can use fml::MakeCopyable with a mutable lambda to achieve it though.
goderbauer
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Feb 20, 2019
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The license script is unhappy :( |
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Updated docs and tweaked the type (and name) of |
Flutter's accessibility APIs consist of three main calls from the
embedder to the Dart application:
1. FlutterEngineUpdateSemanticsEnabled: enables/disables semantics support.
2. FlutterEngineUpdateAccessibilityFeatures: sets embedder-specific
accessibility features.
3. FlutterEngineDispatchSemanticsAction: dispatches an action (tap,
long-press, scroll, etc.) to a semantics node.
and two main callbacks triggered by Dart code:
1. FlutterUpdateSemanticsNodeCallback: notifies the embedder of
updates to the properties of a given semantics node.
2. FlutterUpdateSemanticsCustomActionCallback: notifies the embedder
of updates to custom semantics actions registered in Dart code.
In the Flutter framework, when accessibility is first enabled, the
embedder will receive a stream of update callbacks notifying the
embedder of the full semantics tree. On further changes in the Dart
application, only updates will be sent.
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Author
|
Fixes flutter/flutter#24789. |
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flutter/engine@293b3de98 Roll src/third_party/skia 20ebd0cb3882..348227b89430 (4 commits) (flutter/engine#7900) flutter/engine@6e6020d29 Eliminate .member = foo struct initialization (flutter/engine#7899) flutter/engine@6d8bd99af Revert "Reland PerformanceOverlayLayer golden test (flutter/engine#7863)" (flutter#7895) flutter/engine@39f7066b6 Test profile and release build and unit tests (flutter/engine#7880) flutter/engine@abe9826a9 Add accessibility semantics support to embedder (flutter/engine#7891) flutter/engine@ce7016e1f Roll src/third_party/skia e471c05f92e8..20ebd0cb3882 (4 commits) (flutter/engine#7894) flutter/engine@684c9394c Respect the custom GL proc table when creating the resource context on the IO thread. (flutter/engine#7893) flutter/engine@e11d0e96f Android embedding refactor pr5 add flutterengine impl (flutter/engine#7878) flutter/engine@2f4a38dbd Android embedding refactor pr3 add remaining systemchannels (flutter/engine#7892) flutter/engine@8427d73c8 Reland PerformanceOverlayLayer golden test (flutter/engine#7863) flutter/engine@61fc1786f Roll src/third_party/dart c92d5ca288..5ddd157809 (153 commits) flutter/engine@b0671145a Roll src/third_party/skia 7738736f9622..e471c05f92e8 (23 commits) (flutter/engine#7889) flutter/engine@6d7eb5218 Revert "Android embedding refactor pr3 add remaining systemchannels (flutter/engine#7874)" (flutter#7886)
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flutter/engine@f1f19bba8 Revert "Revert "Revert "Reland PerformanceOverlayLayer golden test (flutter/engine#7863)" (flutter/engine#7895)" (flutter/engine#7911)" (flutter/engine#7916) flutter/engine@5db4b3772 Revert dart rolls (flutter/engine#7913) flutter/engine@0053c1d50 Roll src/third_party/dart 75ee523f91..4cff5a4fd6 (6 commits) flutter/engine@8620579cf Roll src/third_party/skia 9a049e6ce39d..63c4d3596915 (8 commits) (flutter/engine#7909) flutter/engine@aa2b287cb Reland flutter/engine#7777 with proper LICENSE (flutter/engine#7888) flutter/engine@a5773d121 Do not add ghost runs for trailing whitespace if the text is ellipsized (flutter/engine#7906) flutter/engine@93eeb48ba Revert "Revert "Remove unnecessary entry-point closurization. (flutter/engine#7827)" (flutter/engine#7876)" (flutter/engine#7904) flutter/engine@bbaeba3f3 Roll src/third_party/skia 05ff93c43ea5..9a049e6ce39d (11 commits) (flutter/engine#7903) flutter/engine@1cf6b8b64 Roll src/third_party/dart 5ddd157809..75ee523f91 (19 commits) flutter/engine@be32040ef Roll src/third_party/skia 348227b89430..05ff93c43ea5 (2 commits) (flutter/engine#7901) flutter/engine@293b3de98 Roll src/third_party/skia 20ebd0cb3882..348227b89430 (4 commits) (flutter/engine#7900) flutter/engine@6e6020d29 Eliminate .member = foo struct initialization (flutter/engine#7899) flutter/engine@6d8bd99af Revert "Reland PerformanceOverlayLayer golden test (flutter/engine#7863)" (flutter/engine#7895) flutter/engine@39f7066b6 Test profile and release build and unit tests (flutter/engine#7880) flutter/engine@abe9826a9 Add accessibility semantics support to embedder (flutter/engine#7891) flutter/engine@ce7016e1f Roll src/third_party/skia e471c05f92e8..20ebd0cb3882 (4 commits) (flutter/engine#7894) flutter/engine@684c9394c Respect the custom GL proc table when creating the resource context on the IO thread. (flutter/engine#7893) flutter/engine@e11d0e96f Android embedding refactor pr5 add flutterengine impl (flutter/engine#7878) flutter/engine@2f4a38dbd Android embedding refactor pr3 add remaining systemchannels (flutter/engine#7892) flutter/engine@8427d73c8 Reland PerformanceOverlayLayer golden test (flutter/engine#7863) flutter/engine@61fc1786f Roll src/third_party/dart c92d5ca288..5ddd157809 (153 commits) flutter/engine@b0671145a Roll src/third_party/skia 7738736f9622..e471c05f92e8 (23 commits) (flutter/engine#7889) flutter/engine@6d7eb5218 Revert "Android embedding refactor pr3 add remaining systemchannels (flutter/engine#7874)" (flutter/engine#7886) flutter/engine@dad6ec01c Correct onAccessibilityFeaturesChanged docs (flutter/engine#7883)
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flutter/engine@f1f19bba8 Revert "Revert "Revert "Reland PerformanceOverlayLayer golden test (flutter/engine#7863)" (flutter/engine#7895)" (flutter/engine#7911)" (flutter/engine#7916) flutter/engine@5db4b3772 Revert dart rolls (flutter/engine#7913) flutter/engine@0053c1d50 Roll src/third_party/dart 75ee523f91..4cff5a4fd6 (6 commits) flutter/engine@8620579cf Roll src/third_party/skia 9a049e6ce39d..63c4d3596915 (8 commits) (flutter/engine#7909) flutter/engine@aa2b287cb Reland flutter/engine#7777 with proper LICENSE (flutter/engine#7888) flutter/engine@a5773d121 Do not add ghost runs for trailing whitespace if the text is ellipsized (flutter/engine#7906) flutter/engine@93eeb48ba Revert "Revert "Remove unnecessary entry-point closurization. (flutter/engine#7827)" (flutter/engine#7876)" (flutter/engine#7904) flutter/engine@bbaeba3f3 Roll src/third_party/skia 05ff93c43ea5..9a049e6ce39d (11 commits) (flutter/engine#7903) flutter/engine@1cf6b8b64 Roll src/third_party/dart 5ddd157809..75ee523f91 (19 commits) flutter/engine@be32040ef Roll src/third_party/skia 348227b89430..05ff93c43ea5 (2 commits) (flutter/engine#7901) flutter/engine@293b3de98 Roll src/third_party/skia 20ebd0cb3882..348227b89430 (4 commits) (flutter/engine#7900) flutter/engine@6e6020d29 Eliminate .member = foo struct initialization (flutter/engine#7899) flutter/engine@6d8bd99af Revert "Reland PerformanceOverlayLayer golden test (flutter/engine#7863)" (flutter/engine#7895) flutter/engine@39f7066b6 Test profile and release build and unit tests (flutter/engine#7880) flutter/engine@abe9826a9 Add accessibility semantics support to embedder (flutter/engine#7891) flutter/engine@ce7016e1f Roll src/third_party/skia e471c05f92e8..20ebd0cb3882 (4 commits) (flutter/engine#7894) flutter/engine@684c9394c Respect the custom GL proc table when creating the resource context on the IO thread. (flutter/engine#7893) flutter/engine@e11d0e96f Android embedding refactor pr5 add flutterengine impl (flutter/engine#7878) flutter/engine@2f4a38dbd Android embedding refactor pr3 add remaining systemchannels (flutter/engine#7892) flutter/engine@8427d73c8 Reland PerformanceOverlayLayer golden test (flutter/engine#7863) flutter/engine@61fc1786f Roll src/third_party/dart c92d5ca288..5ddd157809 (153 commits) flutter/engine@b0671145a Roll src/third_party/skia 7738736f9622..e471c05f92e8 (23 commits) (flutter/engine#7889) flutter/engine@6d7eb5218 Revert "Android embedding refactor pr3 add remaining systemchannels (flutter/engine#7874)" (flutter/engine#7886) flutter/engine@dad6ec01c Correct onAccessibilityFeaturesChanged docs (flutter/engine#7883)
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Flutter's accessibility APIs consist of three main calls from the
embedder to the Dart application:
FlutterEngineUpdateSemanticsEnabled: enables/disables semantics support.
FlutterEngineUpdateAccessibilityFeatures: sets embedder-specific
accessibility features.
FlutterEngineDispatchSemanticsAction: dispatches an action (tap,
long-press, scroll, etc.) to a semantics node.
and two main callbacks triggered by Dart code:
FlutterUpdateSemanticsNodeCallback: notifies the embedder of
updates to the properties of a given semantics node.
FlutterUpdateSemanticsCustomActionCallback: notifies the embedder
of updates to custom semantics actions registered in Dart code.
In the Flutter framework, when accessibility is first enabled, the
embedder will receive a stream of update callbacks notifying the
embedder of the full semantics tree. On further changes in the Dart
application, only updates will be sent.