perf: improve initialized and recover process

1. init logging system
2. init ui
3. init main

6 files changed, 165 insertions, 95 deletions

diff --git a/src/core/GpgCoreInit.cpp b/src/core/GpgCoreInit.cpp
index 41cf99cb..f1664b2a 100644
--- a/src/core/GpgCoreInit.cpp
+++ b/src/core/GpgCoreInit.cpp
@@ -28,8 +28,6 @@
 
 #include "GpgCoreInit.h"
 
-#include <memory>
-
 #include "GpgFunctionObject.h"
 #include "core/GpgContext.h"
 #include "core/function/GlobalSettingStation.h"
@@ -43,28 +41,37 @@ namespace GpgFrontend {
  * @brief setup logging system and do proper initialization
  *
  */
-void init_logging() {
+void InitLoggingSystem() {
   using namespace boost::posix_time;
   using namespace boost::gregorian;
 
-  ptime now = second_clock::local_time();
-
   el::Loggers::addFlag(el::LoggingFlag::AutoSpacing);
+  el::Loggers::addFlag(el::LoggingFlag::ColoredTerminalOutput);
+  el::Loggers::addFlag(el::LoggingFlag::StrictLogFileSizeCheck);
   el::Configurations defaultConf;
   defaultConf.setToDefault();
-  el::Loggers::reconfigureLogger("default", defaultConf);
 
   // apply settings
   defaultConf.setGlobally(el::ConfigurationType::Format,
-                          "%datetime %level %func %msg");
+                          "%datetime %level [core] {%func} -> %msg");
+
+  // apply settings no written to file
+  defaultConf.setGlobally(el::ConfigurationType::ToFile, "false");
+
+  // set the logger
+  el::Loggers::reconfigureLogger("default", defaultConf);
 
   // get the log directory
-  auto logfile_path =
-      (GlobalSettingStation::GetInstance().GetLogDir() / to_iso_string(now));
+  auto logfile_path = (GlobalSettingStation::GetInstance().GetLogDir() /
+                       to_iso_string(second_clock::local_time()));
   logfile_path.replace_extension(".log");
   defaultConf.setGlobally(el::ConfigurationType::Filename,
                           logfile_path.u8string());
 
+  // apply settings written to file
+  defaultConf.setGlobally(el::ConfigurationType::ToFile, "true");
+
+  // set the logger
   el::Loggers::reconfigureLogger("default", defaultConf);
 
   LOG(INFO) << _("log file path") << logfile_path;
diff --git a/src/core/GpgCoreInit.h b/src/core/GpgCoreInit.h
index 752fe4c3..150e85e9 100644
--- a/src/core/GpgCoreInit.h
+++ b/src/core/GpgCoreInit.h
@@ -37,7 +37,7 @@ namespace GpgFrontend {
  * @brief
  *
  */
-void init_logging();
+void GPGFRONTEND_CORE_EXPORT InitLoggingSystem();
 
 /**
  * @brief
diff --git a/src/init.cpp b/src/init.cpp
index 2f4955f5..775ccbd5 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -26,25 +26,50 @@
  *
  */
 
+#include "GpgFrontend.h"
+#include "GpgFrontendBuildInfo.h"
 #include "core/function/GlobalSettingStation.h"
 
-/**
- * @brief Get the files of a given directory
- *
- * @param _path target directory
- * @return std::vector<std::filesystem::path>
- */
-std::vector<std::filesystem::path> get_files_of_directory(
-    const std::filesystem::path& _path) {
-  namespace fs = std::filesystem;
-  std::vector<fs::path> path_list;
-  if (!_path.empty()) {
-    fs::recursive_directory_iterator end;
-
-    for (fs::recursive_directory_iterator i(_path); i != end; ++i) {
-      const fs::path cp = (*i);
-      path_list.push_back(cp);
-    }
-  }
-  return path_list;
-}
\ No newline at end of file
+QApplication* init_qapplication(int argc, char* argv[]) {
+  auto* app = new QApplication(argc, argv);
+#ifndef MACOS
+  app->setWindowIcon(QIcon(":gpgfrontend.png"));
+#endif
+
+#ifdef MACOS
+  // support retina screen
+  app->setAttribute(Qt::AA_UseHighDpiPixmaps);
+#endif
+
+  // set the extra information of the build
+  app->setApplicationVersion(BUILD_VERSION);
+  app->setApplicationName(PROJECT_NAME);
+  app->setQuitOnLastWindowClosed(true);
+
+  // don't show icons in menus
+  app->setAttribute(Qt::AA_DontShowIconsInMenus);
+
+  // unicode in source
+  QTextCodec::setCodecForLocale(QTextCodec::codecForName("utf-8"));
+  return app;
+}
+
+void destory_qapplication(QApplication* app) {
+  app->quit();
+  delete app;
+}
+
+void init_logging_system() {
+  el::Loggers::addFlag(el::LoggingFlag::AutoSpacing);
+  el::Configurations defaultConf;
+  defaultConf.setToDefault();
+
+  // apply settings
+  defaultConf.setGlobally(el::ConfigurationType::Format,
+                          "%datetime %level [main] %func %msg");
+  // apply settings no written to file
+  defaultConf.setGlobally(el::ConfigurationType::ToFile, "false");
+
+  // set the logger
+  el::Loggers::reconfigureLogger("default", defaultConf);
+}
diff --git a/src/main.cpp b/src/main.cpp
index fd20a664..6ef5a7bc 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -32,16 +32,11 @@
 
 #include <csetjmp>
 #include <csignal>
-#include <cstdlib>
+#include <cstddef>
 
-#include "GpgFrontendBuildInfo.h"
-#include "core/GpgFunctionObject.h"
-#include "ui/GpgFrontendUIInit.h"
-#include "ui/main_window/MainWindow.h"
-
-#if !defined(RELEASE) && defined(WINDOWS)
+#include "core/GpgCoreInit.h"
 #include "core/function/GlobalSettingStation.h"
-#endif
+#include "ui/GpgFrontendUIInit.h"
 
 /**
  * \brief initialize the easylogging++ library.
@@ -54,19 +49,40 @@ INITIALIZE_EASYLOGGINGPP
 jmp_buf recover_env;
 
 /**
- * @brief
+ * @brief handle the signal SIGSEGV
  *
  * @param sig
  */
 extern void handle_signal(int sig);
 
 /**
- * @brief
+ * @brief processes before exit the program.
  *
  */
 extern void before_exit();
 
 /**
+ * @brief init a new instance of QApplication.
+ *
+ * @param argc
+ * @param argv
+ */
+extern QApplication* init_qapplication(int argc, char* argv[]);
+
+/**
+ * @brief destroy the instance of QApplication.
+ *
+ * @param app
+ */
+extern void destory_qapplication(QApplication* app);
+
+/**
+ * @brief initialize the logging system.
+ *
+ */
+extern void init_logging_system();
+
+/**
  *
  * @param argc
  * @param argv
@@ -81,42 +97,17 @@ int main(int argc, char* argv[]) {
   // clean something before exit
   atexit(before_exit);
 
+  // init the logging system
+  init_logging_system();
+
+  // init the logging system for core
+  GpgFrontend::InitLoggingSystem();
+
   // initialize qt resources
   Q_INIT_RESOURCE(gpgfrontend);
 
   // create qt application
-  QApplication app(argc, argv);
-
-#ifndef MACOS
-  QApplication::setWindowIcon(QIcon(":gpgfrontend.png"));
-#endif
-
-#ifdef MACOS
-  // support retina screen
-  QApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
-#endif
-
-  // set the extra information of the build
-  QApplication::setApplicationVersion(BUILD_VERSION);
-  QApplication::setApplicationName(PROJECT_NAME);
-
-  // don't show icons in menus
-  QApplication::setAttribute(Qt::AA_DontShowIconsInMenus);
-
-  // unicode in source
-  QTextCodec::setCodecForLocale(QTextCodec::codecForName("utf-8"));
-
-#if !defined(RELEASE) && defined(WINDOWS)
-  // css
-  std::filesystem::path css_path =
-      GpgFrontend::GlobalSettingStation::GetInstance().GetResourceDir() /
-      "css" / "default.qss";
-  QFile file(css_path.u8string().c_str());
-  file.open(QFile::ReadOnly);
-  QString styleSheet = QLatin1String(file.readAll());
-  qApp->setStyleSheet(styleSheet);
-  file.close();
-#endif
+  auto* app = init_qapplication(argc, argv);
 
   /**
    * internationalisation. loop to restart main window
@@ -134,13 +125,14 @@ int main(int argc, char* argv[]) {
 #ifdef RELEASE
       try {
 #endif
-        QApplication::setQuitOnLastWindowClosed(true);
+        // renew application
+        if (app == nullptr) app = init_qapplication(argc, argv);
 
         // init ui library
-        GpgFrontend::UI::InitGpgFrontendUI();
+        GpgFrontend::UI::InitGpgFrontendUI(app);
 
         // create main window
-        return_from_event_loop_code = GpgFrontend::UI::RunGpgFrontendUI();
+        return_from_event_loop_code = GpgFrontend::UI::RunGpgFrontendUI(app);
 #ifdef RELEASE
       } catch (...) {
         // catch all unhandled exceptions and notify the user
@@ -152,10 +144,8 @@ int main(int argc, char* argv[]) {
               "serious problem, it may be the negligence of the programmer, "
               "please report this problem if you can."));
         return_from_event_loop_code = RESTART_CODE;
-        continue;
       }
 #endif
-
     } else {
       // when signal is caught, restart the main window
       QMessageBox::information(
@@ -163,11 +153,16 @@ int main(int argc, char* argv[]) {
           _("Oh no! GpgFrontend caught a serious error in the software, so it "
             "needs to be restarted. If the problem recurs, please manually "
             "terminate the program and report the problem to the developer."));
-      QCoreApplication::quit();
       return_from_event_loop_code = RESTART_CODE;
       LOG(INFO) << "return_from_event_loop_code" << return_from_event_loop_code;
-      continue;
     }
+
+    // destory the application
+    if (app) {
+      destory_qapplication(app);
+      app = nullptr;
+    }
+
     LOG(INFO) << "loop refresh";
   } while (return_from_event_loop_code == RESTART_CODE);
 
diff --git a/src/ui/GpgFrontendUIInit.cpp b/src/ui/GpgFrontendUIInit.cpp
index e7751ee6..8fa102af 100644
--- a/src/ui/GpgFrontendUIInit.cpp
+++ b/src/ui/GpgFrontendUIInit.cpp
@@ -28,6 +28,7 @@
 
 #include "GpgFrontendUIInit.h"
 
+#include "GpgFrontendBuildInfo.h"
 #include "core/function/GlobalSettingStation.h"
 #include "core/thread/CtxCheckTask.h"
 #include "core/thread/TaskRunnerGetter.h"
@@ -35,6 +36,10 @@
 #include "ui/UserInterfaceUtils.h"
 #include "ui/main_window/MainWindow.h"
 
+#if !defined(RELEASE) && defined(WINDOWS)
+#include "core/function/GlobalSettingStation.h"
+#endif
+
 // init easyloggingpp library
 INITIALIZE_EASYLOGGINGPP
 
@@ -43,10 +48,50 @@ namespace GpgFrontend::UI {
 extern void init_logging();
 extern void init_locale();
 
-void InitGpgFrontendUI() {
+void InitGpgFrontendUI(QApplication* app) {
+  app->setQuitOnLastWindowClosed(true);
+
+#ifndef MACOS
+  app->setWindowIcon(QIcon(":gpgfrontend.png"));
+#endif
+
+#ifdef MACOS
+  // support retina screen
+  app->setAttribute(Qt::AA_UseHighDpiPixmaps);
+#endif
+
+  // set the extra information of the build
+  app->setApplicationVersion(BUILD_VERSION);
+  app->setApplicationName(PROJECT_NAME);
+
+  // don't show icons in menus
+  app->setAttribute(Qt::AA_DontShowIconsInMenus);
+
+  // unicode in source
+  QTextCodec::setCodecForLocale(QTextCodec::codecForName("utf-8"));
+
+#if !defined(RELEASE) && defined(WINDOWS)
+  // css
+  std::filesystem::path css_path =
+      GpgFrontend::GlobalSettingStation::GetInstance().GetResourceDir() /
+      "css" / "default.qss";
+  QFile file(css_path.u8string().c_str());
+  file.open(QFile::ReadOnly);
+  QString styleSheet = QLatin1String(file.readAll());
+  qApp->setStyleSheet(styleSheet);
+  file.close();
+#endif
+
+  // init locale
   init_locale();
+
+  // init logging system
   init_logging();
+
+  // init signal station
   SignalStation::GetInstance();
+
+  // init common utils
   CommonUtils::GetInstance();
 
   // create the thread to load the gpg context
@@ -65,15 +110,14 @@ void InitGpgFrontendUI() {
   waiting_dialog_label->setWordWrap(true);
   waiting_dialog->setLabel(waiting_dialog_label);
   waiting_dialog->resize(420, 120);
-  QApplication::connect(init_ctx_task,
-                        &Thread::CtxCheckTask::SignalTaskFinished,
-                        waiting_dialog, [=]() {
-                          LOG(INFO) << "Gpg context loaded";
-                          waiting_dialog->finished(0);
-                          waiting_dialog->deleteLater();
-                        });
-
-  QApplication::connect(waiting_dialog, &QProgressDialog::canceled, [=]() {
+  app->connect(init_ctx_task, &Thread::CtxCheckTask::SignalTaskFinished,
+               waiting_dialog, [=]() {
+                 LOG(INFO) << "Gpg context loaded";
+                 waiting_dialog->finished(0);
+                 waiting_dialog->deleteLater();
+               });
+
+  app->connect(waiting_dialog, &QProgressDialog::canceled, [=]() {
     LOG(INFO) << "cancel clicked";
     QCoreApplication::quit();
     exit(0);
@@ -86,9 +130,8 @@ void InitGpgFrontendUI() {
 
   // new local event looper
   QEventLoop looper;
-  QApplication::connect(init_ctx_task,
-                        &Thread::CtxCheckTask::SignalTaskFinished, &looper,
-                        &QEventLoop::quit);
+  app->connect(init_ctx_task, &Thread::CtxCheckTask::SignalTaskFinished,
+               &looper, &QEventLoop::quit);
 
   // start the thread to load the gpg context
   Thread::TaskRunnerGetter::GetInstance().GetTaskRunner()->PostTask(
@@ -98,7 +141,7 @@ void InitGpgFrontendUI() {
   looper.exec();
 }
 
-int RunGpgFrontendUI() {
+int RunGpgFrontendUI(QApplication* app) {
   // create main window and show it
   auto main_window = std::make_unique<GpgFrontend::UI::MainWindow>();
   main_window->Init();
diff --git a/src/ui/GpgFrontendUIInit.h b/src/ui/GpgFrontendUIInit.h
index d7b6390d..9b490c0f 100644
--- a/src/ui/GpgFrontendUIInit.h
+++ b/src/ui/GpgFrontendUIInit.h
@@ -37,12 +37,12 @@ namespace GpgFrontend::UI {
  * @brief init the UI library
  *
  */
-void GPGFRONTEND_UI_EXPORT InitGpgFrontendUI();
+void GPGFRONTEND_UI_EXPORT InitGpgFrontendUI(QApplication *);
 
 /**
  * @brief run main window
  */
-int GPGFRONTEND_UI_EXPORT RunGpgFrontendUI();
+int GPGFRONTEND_UI_EXPORT RunGpgFrontendUI(QApplication *);
 
 };  // namespace GpgFrontend::UI