cef/tests/shared/browser/main_message_loop_external_...

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// Copyright (c) 2016 The Chromium Embedded Framework Authors. All rights
// reserved. Use of this source code is governed by a BSD-style license that
// can be found in the LICENSE file.
#include "tests/shared/browser/main_message_loop_external_pump.h"
#include <CommCtrl.h>
#include <memory>
#include "include/cef_app.h"
#include "tests/shared/browser/util_win.h"
namespace client {
namespace {
// Message sent to get an additional time slice for pumping (processing) another
// task (a series of such messages creates a continuous task pump).
static const int kMsgHaveWork = WM_USER + 1;
class MainMessageLoopExternalPumpWin : public MainMessageLoopExternalPump {
public:
MainMessageLoopExternalPumpWin();
~MainMessageLoopExternalPumpWin() override;
// MainMessageLoopStd methods:
void Quit() override;
int Run() override;
// MainMessageLoopExternalPump methods:
void OnScheduleMessagePumpWork(int64_t delay_ms) override;
protected:
// MainMessageLoopExternalPump methods:
void SetTimer(int64_t delay_ms) override;
void KillTimer() override;
bool IsTimerPending() override { return timer_pending_; }
private:
static LRESULT CALLBACK WndProc(HWND hwnd,
UINT msg,
WPARAM wparam,
LPARAM lparam);
// True if a timer event is currently pending.
bool timer_pending_ = false;
// HWND owned by the thread that CefDoMessageLoopWork should be invoked on.
HWND main_thread_target_ = nullptr;
};
MainMessageLoopExternalPumpWin::MainMessageLoopExternalPumpWin() {
HINSTANCE hInstance = GetModuleHandle(nullptr);
const wchar_t* const kClassName = L"CEFMainTargetHWND";
WNDCLASSEX wcex = {};
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.lpfnWndProc = WndProc;
wcex.hInstance = hInstance;
wcex.lpszClassName = kClassName;
RegisterClassEx(&wcex);
// Create the message handling window.
main_thread_target_ =
CreateWindowW(kClassName, nullptr, WS_OVERLAPPEDWINDOW, 0, 0, 0, 0,
HWND_MESSAGE, nullptr, hInstance, nullptr);
DCHECK(main_thread_target_);
SetUserDataPtr(main_thread_target_, this);
}
MainMessageLoopExternalPumpWin::~MainMessageLoopExternalPumpWin() {
KillTimer();
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if (main_thread_target_) {
DestroyWindow(main_thread_target_);
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}
}
void MainMessageLoopExternalPumpWin::Quit() {
PostMessage(nullptr, WM_QUIT, 0, 0);
}
int MainMessageLoopExternalPumpWin::Run() {
// Run the message loop.
MSG msg;
while (GetMessage(&msg, nullptr, 0, 0)) {
TranslateMessage(&msg);
DispatchMessage(&msg);
}
KillTimer();
// We need to run the message pump until it is idle. However we don't have
// that information here so we run the message loop "for a while".
for (int i = 0; i < 10; ++i) {
// Do some work.
CefDoMessageLoopWork();
// Sleep to allow the CEF proc to do work.
Sleep(50);
}
return 0;
}
void MainMessageLoopExternalPumpWin::OnScheduleMessagePumpWork(
int64_t delay_ms) {
// This method may be called on any thread.
PostMessage(main_thread_target_, kMsgHaveWork, 0,
static_cast<LPARAM>(delay_ms));
}
void MainMessageLoopExternalPumpWin::SetTimer(int64_t delay_ms) {
DCHECK(!timer_pending_);
DCHECK_GT(delay_ms, 0);
timer_pending_ = true;
::SetTimer(main_thread_target_, 1, static_cast<UINT>(delay_ms), nullptr);
}
void MainMessageLoopExternalPumpWin::KillTimer() {
if (timer_pending_) {
::KillTimer(main_thread_target_, 1);
timer_pending_ = false;
}
}
// static
LRESULT CALLBACK MainMessageLoopExternalPumpWin::WndProc(HWND hwnd,
UINT msg,
WPARAM wparam,
LPARAM lparam) {
if (msg == WM_TIMER || msg == kMsgHaveWork) {
MainMessageLoopExternalPumpWin* message_loop =
GetUserDataPtr<MainMessageLoopExternalPumpWin*>(hwnd);
if (msg == kMsgHaveWork) {
// OnScheduleMessagePumpWork() request.
const int64_t delay_ms = static_cast<int64_t>(lparam);
message_loop->OnScheduleWork(delay_ms);
} else {
// Timer timed out.
message_loop->OnTimerTimeout();
}
}
return DefWindowProc(hwnd, msg, wparam, lparam);
}
} // namespace
// static
std::unique_ptr<MainMessageLoopExternalPump>
MainMessageLoopExternalPump::Create() {
return std::make_unique<MainMessageLoopExternalPumpWin>();
}
} // namespace client