From 0ded09ae67414db720ab576fdf4ac9a69145e8d5 Mon Sep 17 00:00:00 2001 From: Jonah Williams Date: Wed, 12 May 2021 10:07:17 -0700 Subject: [PATCH] Update windows template to remove runloop code (#498) --- windows/runner/CMakeLists.txt | 1 - windows/runner/flutter_window.cpp | 9 ++--- windows/runner/flutter_window.h | 10 +---- windows/runner/main.cpp | 11 +++--- windows/runner/run_loop.cpp | 66 ------------------------------- windows/runner/run_loop.h | 40 ------------------- 6 files changed, 11 insertions(+), 126 deletions(-) delete mode 100644 windows/runner/run_loop.cpp delete mode 100644 windows/runner/run_loop.h diff --git a/windows/runner/CMakeLists.txt b/windows/runner/CMakeLists.txt index 977e38b5d1..0b899a0bcf 100644 --- a/windows/runner/CMakeLists.txt +++ b/windows/runner/CMakeLists.txt @@ -4,7 +4,6 @@ project(runner LANGUAGES CXX) add_executable(${BINARY_NAME} WIN32 "flutter_window.cpp" "main.cpp" - "run_loop.cpp" "utils.cpp" "win32_window.cpp" "${FLUTTER_MANAGED_DIR}/generated_plugin_registrant.cc" diff --git a/windows/runner/flutter_window.cpp b/windows/runner/flutter_window.cpp index c422723045..b43b9095ea 100644 --- a/windows/runner/flutter_window.cpp +++ b/windows/runner/flutter_window.cpp @@ -4,9 +4,8 @@ #include "flutter/generated_plugin_registrant.h" -FlutterWindow::FlutterWindow(RunLoop* run_loop, - const flutter::DartProject& project) - : run_loop_(run_loop), project_(project) {} +FlutterWindow::FlutterWindow(const flutter::DartProject& project) + : project_(project) {} FlutterWindow::~FlutterWindow() {} @@ -26,14 +25,12 @@ bool FlutterWindow::OnCreate() { return false; } RegisterPlugins(flutter_controller_->engine()); - run_loop_->RegisterFlutterInstance(flutter_controller_->engine()); SetChildContent(flutter_controller_->view()->GetNativeWindow()); return true; } void FlutterWindow::OnDestroy() { if (flutter_controller_) { - run_loop_->UnregisterFlutterInstance(flutter_controller_->engine()); flutter_controller_ = nullptr; } @@ -44,7 +41,7 @@ LRESULT FlutterWindow::MessageHandler(HWND hwnd, UINT const message, WPARAM const wparam, LPARAM const lparam) noexcept { - // Give Flutter, including plugins, an opporutunity to handle window messages. + // Give Flutter, including plugins, an opportunity to handle window messages. if (flutter_controller_) { std::optional result = flutter_controller_->HandleTopLevelWindowProc(hwnd, message, wparam, diff --git a/windows/runner/flutter_window.h b/windows/runner/flutter_window.h index b663ddd501..6da0652f05 100644 --- a/windows/runner/flutter_window.h +++ b/windows/runner/flutter_window.h @@ -6,16 +6,13 @@ #include -#include "run_loop.h" #include "win32_window.h" // A window that does nothing but host a Flutter view. class FlutterWindow : public Win32Window { public: - // Creates a new FlutterWindow driven by the |run_loop|, hosting a - // Flutter view running |project|. - explicit FlutterWindow(RunLoop* run_loop, - const flutter::DartProject& project); + // Creates a new FlutterWindow hosting a Flutter view running |project|. + explicit FlutterWindow(const flutter::DartProject& project); virtual ~FlutterWindow(); protected: @@ -26,9 +23,6 @@ class FlutterWindow : public Win32Window { LPARAM const lparam) noexcept override; private: - // The run loop driving events for this window. - RunLoop* run_loop_; - // The project to run. flutter::DartProject project_; diff --git a/windows/runner/main.cpp b/windows/runner/main.cpp index 01cdb323a1..595cb40775 100644 --- a/windows/runner/main.cpp +++ b/windows/runner/main.cpp @@ -3,7 +3,6 @@ #include #include "flutter_window.h" -#include "run_loop.h" #include "utils.h" int APIENTRY wWinMain(_In_ HINSTANCE instance, _In_opt_ HINSTANCE prev, @@ -18,8 +17,6 @@ int APIENTRY wWinMain(_In_ HINSTANCE instance, _In_opt_ HINSTANCE prev, // plugins. ::CoInitializeEx(nullptr, COINIT_APARTMENTTHREADED); - RunLoop run_loop; - flutter::DartProject project(L"data"); std::vector command_line_arguments = @@ -27,7 +24,7 @@ int APIENTRY wWinMain(_In_ HINSTANCE instance, _In_opt_ HINSTANCE prev, project.set_dart_entrypoint_arguments(std::move(command_line_arguments)); - FlutterWindow window(&run_loop, project); + FlutterWindow window(project); Win32Window::Point origin(10, 10); Win32Window::Size size(1280, 720); if (!window.CreateAndShow(L"gallery", origin, size)) { @@ -35,7 +32,11 @@ int APIENTRY wWinMain(_In_ HINSTANCE instance, _In_opt_ HINSTANCE prev, } window.SetQuitOnClose(true); - run_loop.Run(); + ::MSG msg; + while (::GetMessage(&msg, nullptr, 0, 0)) { + ::TranslateMessage(&msg); + ::DispatchMessage(&msg); + } ::CoUninitialize(); return EXIT_SUCCESS; diff --git a/windows/runner/run_loop.cpp b/windows/runner/run_loop.cpp deleted file mode 100644 index 2d6636ab6b..0000000000 --- a/windows/runner/run_loop.cpp +++ /dev/null @@ -1,66 +0,0 @@ -#include "run_loop.h" - -#include - -#include - -RunLoop::RunLoop() {} - -RunLoop::~RunLoop() {} - -void RunLoop::Run() { - bool keep_running = true; - TimePoint next_flutter_event_time = TimePoint::clock::now(); - while (keep_running) { - std::chrono::nanoseconds wait_duration = - std::max(std::chrono::nanoseconds(0), - next_flutter_event_time - TimePoint::clock::now()); - ::MsgWaitForMultipleObjects( - 0, nullptr, FALSE, static_cast(wait_duration.count() / 1000), - QS_ALLINPUT); - bool processed_events = false; - MSG message; - // All pending Windows messages must be processed; MsgWaitForMultipleObjects - // won't return again for items left in the queue after PeekMessage. - while (::PeekMessage(&message, nullptr, 0, 0, PM_REMOVE)) { - processed_events = true; - if (message.message == WM_QUIT) { - keep_running = false; - break; - } - ::TranslateMessage(&message); - ::DispatchMessage(&message); - // Allow Flutter to process messages each time a Windows message is - // processed, to prevent starvation. - next_flutter_event_time = - std::min(next_flutter_event_time, ProcessFlutterMessages()); - } - // If the PeekMessage loop didn't run, process Flutter messages. - if (!processed_events) { - next_flutter_event_time = - std::min(next_flutter_event_time, ProcessFlutterMessages()); - } - } -} - -void RunLoop::RegisterFlutterInstance( - flutter::FlutterEngine* flutter_instance) { - flutter_instances_.insert(flutter_instance); -} - -void RunLoop::UnregisterFlutterInstance( - flutter::FlutterEngine* flutter_instance) { - flutter_instances_.erase(flutter_instance); -} - -RunLoop::TimePoint RunLoop::ProcessFlutterMessages() { - TimePoint next_event_time = TimePoint::max(); - for (auto instance : flutter_instances_) { - std::chrono::nanoseconds wait_duration = instance->ProcessMessages(); - if (wait_duration != std::chrono::nanoseconds::max()) { - next_event_time = - std::min(next_event_time, TimePoint::clock::now() + wait_duration); - } - } - return next_event_time; -} diff --git a/windows/runner/run_loop.h b/windows/runner/run_loop.h deleted file mode 100644 index 000d362463..0000000000 --- a/windows/runner/run_loop.h +++ /dev/null @@ -1,40 +0,0 @@ -#ifndef RUNNER_RUN_LOOP_H_ -#define RUNNER_RUN_LOOP_H_ - -#include - -#include -#include - -// A runloop that will service events for Flutter instances as well -// as native messages. -class RunLoop { - public: - RunLoop(); - ~RunLoop(); - - // Prevent copying - RunLoop(RunLoop const&) = delete; - RunLoop& operator=(RunLoop const&) = delete; - - // Runs the run loop until the application quits. - void Run(); - - // Registers the given Flutter instance for event servicing. - void RegisterFlutterInstance( - flutter::FlutterEngine* flutter_instance); - - // Unregisters the given Flutter instance from event servicing. - void UnregisterFlutterInstance( - flutter::FlutterEngine* flutter_instance); - - private: - using TimePoint = std::chrono::steady_clock::time_point; - - // Processes all currently pending messages for registered Flutter instances. - TimePoint ProcessFlutterMessages(); - - std::set flutter_instances_; -}; - -#endif // RUNNER_RUN_LOOP_H_