Flutter Windows Embedder
flutter::AccessibilityPlugin Class Reference

#include <accessibility_plugin.h>

Public Member Functions

 AccessibilityPlugin (FlutterWindowsEngine *engine)
 
virtual void Announce (const std::string_view message)
 

Static Public Member Functions

static void SetUp (BinaryMessenger *binary_messenger, AccessibilityPlugin *plugin)
 

Detailed Description

Definition at line 21 of file accessibility_plugin.h.

Constructor & Destructor Documentation

◆ AccessibilityPlugin()

flutter::AccessibilityPlugin::AccessibilityPlugin ( FlutterWindowsEngine engine)
explicit

Definition at line 73 of file accessibility_plugin.cc.

74  : engine_(engine) {}

Member Function Documentation

◆ Announce()

void flutter::AccessibilityPlugin::Announce ( const std::string_view  message)
virtual

Definition at line 92 of file accessibility_plugin.cc.

92  {
93  if (!engine_->semantics_enabled()) {
94  return;
95  }
96 
97  // TODO(loicsharma): Remove implicit view assumption.
98  // https://github.com/flutter/flutter/issues/142845
99  auto view = engine_->view(kImplicitViewId);
100  if (!view) {
101  return;
102  }
103 
104  std::wstring wide_text = fml::Utf8ToWideString(message);
105  view->AnnounceAlert(wide_text);
106 }

References flutter::kImplicitViewId, message, flutter::FlutterWindowsEngine::semantics_enabled(), and flutter::FlutterWindowsEngine::view().

◆ SetUp()

void flutter::AccessibilityPlugin::SetUp ( BinaryMessenger binary_messenger,
AccessibilityPlugin plugin 
)
static

Definition at line 76 of file accessibility_plugin.cc.

77  {
78  BasicMessageChannel<> channel{binary_messenger, kAccessibilityChannelName,
80 
81  channel.SetMessageHandler(
82  [plugin](const EncodableValue& message,
83  const MessageReply<EncodableValue>& reply) {
84  HandleMessage(plugin, message);
85 
86  // The accessibility channel does not support error handling.
87  // Always return an empty response even on failure.
88  reply(EncodableValue{std::monostate{}});
89  });
90 }

References flutter::StandardMessageCodec::GetInstance(), kAccessibilityChannelName, and message.


The documentation for this class was generated from the following files:
flutter::kImplicitViewId
constexpr FlutterViewId kImplicitViewId
Definition: flutter_windows_engine.h:55
flutter::FlutterWindowsEngine::view
FlutterWindowsView * view(FlutterViewId view_id) const
Definition: flutter_windows_engine.cc:656
kAccessibilityChannelName
static constexpr char kAccessibilityChannelName[]
Definition: flutter_windows_engine.cc:32
flutter::FlutterWindowsEngine::semantics_enabled
bool semantics_enabled() const
Definition: flutter_windows_engine.h:239
flutter::StandardMessageCodec::GetInstance
static const StandardMessageCodec & GetInstance(const StandardCodecSerializer *serializer=nullptr)
Definition: standard_codec.cc:293
message
Win32Message message
Definition: keyboard_unittests.cc:137