cef/libcef/common/chrome/chrome_main_runner_delegate.cc

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// Copyright 2020 The Chromium Embedded Framework Authors.
// Portions copyright 2012 The Chromium 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 "libcef/common/chrome/chrome_main_runner_delegate.h"
#include "libcef/common/app_manager.h"
#include "libcef/common/chrome/chrome_main_delegate_cef.h"
#include "base/command_line.h"
#include "base/run_loop.h"
#include "chrome/browser/browser_process_impl.h"
#include "chrome/browser/chrome_content_browser_client.h"
#include "chrome/browser/chrome_process_singleton.h"
#include "chrome/common/profiler/main_thread_stack_sampling_profiler.h"
#include "components/keep_alive_registry/keep_alive_types.h"
#include "components/keep_alive_registry/scoped_keep_alive.h"
#include "components/metrics/persistent_system_profile.h"
ChromeMainRunnerDelegate::ChromeMainRunnerDelegate(
CefMainRunnerHandler* runner,
CefSettings* settings,
CefRefPtr<CefApp> application)
: runner_(runner), settings_(settings), application_(application) {}
ChromeMainRunnerDelegate::~ChromeMainRunnerDelegate() = default;
content::ContentMainDelegate*
ChromeMainRunnerDelegate::GetContentMainDelegate() {
if (!main_delegate_) {
main_delegate_ = std::make_unique<ChromeMainDelegateCef>(runner_, settings_,
application_);
}
return main_delegate_.get();
}
void ChromeMainRunnerDelegate::BeforeMainThreadInitialize(
const CefMainArgs& args) {
#if BUILDFLAG(IS_WIN)
base::CommandLine::Init(0, nullptr);
#else
base::CommandLine::Init(args.argc, args.argv);
#endif
}
void ChromeMainRunnerDelegate::BeforeMainThreadRun(
bool multi_threaded_message_loop) {
if (multi_threaded_message_loop) {
multi_threaded_message_loop_ = true;
// Detach from the main thread so that these objects can be attached and
// modified from the UI thread going forward.
metrics::GlobalPersistentSystemProfile::GetInstance()
->DetachFromCurrentThread();
}
}
void ChromeMainRunnerDelegate::BeforeMainMessageLoopRun(
base::RunLoop* run_loop) {
// May be nullptr if content::ContentMainRun exits early.
if (!g_browser_process) {
return;
}
// The ScopedKeepAlive instance triggers shutdown logic when released on the
// UI thread before terminating the message loop (e.g. from CefQuitMessageLoop
// or FinishShutdownOnUIThread when running with multi-threaded message loop).
keep_alive_ = std::make_unique<ScopedKeepAlive>(
KeepAliveOrigin::APP_CONTROLLER, KeepAliveRestartOption::DISABLED);
// The QuitClosure will be executed from BrowserProcessImpl::Unpin() via
// KeepAliveRegistry when the last ScopedKeepAlive is released.
// ScopedKeepAlives are also held by Browser objects.
static_cast<BrowserProcessImpl*>(g_browser_process)
->SetQuitClosure(run_loop->QuitClosure());
}
bool ChromeMainRunnerDelegate::HandleMainMessageLoopQuit() {
// May be nullptr if content::ContentMainRun exits early.
if (!g_browser_process) {
// Proceed with direct execution of the QuitClosure().
return false;
}
// May be called multiple times. See comments in RunMainMessageLoopBefore.
keep_alive_.reset();
// Cancel direct execution of the QuitClosure() in
// CefMainRunner::QuitMessageLoop. We instead wait for all Chrome browser
// windows to exit.
return true;
}
void ChromeMainRunnerDelegate::BeforeUIThreadInitialize() {
sampling_profiler_ = std::make_unique<MainThreadStackSamplingProfiler>();
}
void ChromeMainRunnerDelegate::BeforeUIThreadShutdown() {
static_cast<ChromeContentBrowserClient*>(
CefAppManager::Get()->GetContentClient()->browser())
->CleanupOnUIThread();
main_delegate_->CleanupOnUIThread();
sampling_profiler_.reset();
}
void ChromeMainRunnerDelegate::AfterUIThreadShutdown() {
if (multi_threaded_message_loop_) {
// Don't wait for this to be called in ChromeMainDelegate::ProcessExiting.
// It is safe to call multiple times.
ChromeProcessSingleton::DeleteInstance();
}
}
void ChromeMainRunnerDelegate::BeforeExecuteProcess(const CefMainArgs& args) {
BeforeMainThreadInitialize(args);
}
void ChromeMainRunnerDelegate::AfterExecuteProcess() {
AfterMainThreadShutdown();
}