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// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
part of dart.ui;
// ignore_for_file: avoid_classes_with_only_static_members
/// Helper functions for Dart Plugin Registrants.
abstract final class DartPluginRegistrant {
static bool _wasInitialized = false;
/// Makes sure the that the Dart Plugin Registrant has been called for this
/// isolate. This can safely be executed multiple times on the same isolate,
/// but should not be called on the Root isolate.
static void ensureInitialized() {
if (!_wasInitialized) {
_wasInitialized = true;
_ensureInitialized();
}
}
@Native<Void Function()>(symbol: 'DartPluginRegistrant_EnsureInitialized')
external static void _ensureInitialized();
}
// Corelib 'print' implementation.
void _print(String arg) {
_Logger._printString(arg);
}
void _printDebug(String arg) {
_Logger._printDebugString(arg);
}
class _Logger {
@Native<Void Function(Handle)>(symbol: 'DartRuntimeHooks::Logger_PrintString')
external static void _printString(String? s);
@Native<Void Function(Handle)>(symbol: 'DartRuntimeHooks::Logger_PrintDebugString')
external static void _printDebugString(String? s);
}
// If we actually run on big endian machines, we'll need to do something smarter
// here. We don't use [Endian.Host] because it's not a compile-time
// constant and can't propagate into the set/get calls.
const Endian _kFakeHostEndian = Endian.little;
// A service protocol extension to schedule a frame to be rendered into the
// window.
Future<developer.ServiceExtensionResponse> _scheduleFrame(
String method,
Map<String, String> parameters,
) async {
// Schedule the frame.
PlatformDispatcher.instance.scheduleFrame();
// Always succeed.
return developer.ServiceExtensionResponse.result(json.encode(<String, String>{
'type': 'Success',
}));
}
Future<developer.ServiceExtensionResponse> _reinitializeShader(
String method,
Map<String, String> parameters,
) async {
final String? assetKey = parameters['assetKey'];
if (assetKey != null) {
FragmentProgram._reinitializeShader(assetKey);
}
// Always succeed.
return developer.ServiceExtensionResponse.result(json.encode(<String, String>{
'type': 'Success',
}));
}
Future<developer.ServiceExtensionResponse> _getImpellerEnabled(
String method,
Map<String, String> parameters,
) async {
return developer.ServiceExtensionResponse.result(json.encode(<String, Object>{
'type': 'Success',
'enabled': _impellerEnabled,
}));
}
const bool _kReleaseMode = bool.fromEnvironment('dart.vm.product');
@Native<Void Function(Handle)>(symbol: 'DartRuntimeHooks::ScheduleMicrotask')
external void _scheduleMicrotask(void Function() callback);
@Native<Handle Function(Handle)>(symbol: 'DartRuntimeHooks::GetCallbackHandle')
external int? _getCallbackHandle(Function closure);
@Native<Handle Function(Int64)>(symbol: 'DartRuntimeHooks::GetCallbackFromHandle')
external Function? _getCallbackFromHandle(int handle);
typedef _PrintClosure = void Function(String line);
// Used by the embedder to initialize how printing is performed.
// See also https://github.com/dart-lang/sdk/blob/main/sdk/lib/_internal/vm/lib/print_patch.dart
@pragma('vm:entry-point')
_PrintClosure _getPrintClosure() => _print;
typedef _ScheduleImmediateClosure = void Function(void Function());
// Used by the embedder to initialize how microtasks are scheduled.
// See also https://github.com/dart-lang/sdk/blob/main/sdk/lib/_internal/vm/lib/schedule_microtask_patch.dart
@pragma('vm:entry-point')
_ScheduleImmediateClosure _getScheduleMicrotaskClosure() => _scheduleMicrotask;
// Used internally to indicate whether the Engine is using Impeller for
// rendering.
@pragma('vm:entry-point')
bool _impellerEnabled = false;
// Used internally to indicate whether the embedder enables the implicit view,
// and the implicit view's ID if so.
//
// The exact value of this variable is an implementation detail that may change
// at any time. Apps should always use PlatformDispatcher.implicitView to
// determine the current implicit view, if any.
@pragma('vm:entry-point')
int? _implicitViewId;