refactor: replace qFatal with qCritical

src/lib/gui/ScreenSetupModel.cpp

@@ -8,12 +8,13 @@
 
 #include "ScreenSetupModel.h"
 
+#include "common/Constants.h"
+#include "gui/config/Screen.h"
+
 #include <QIODevice>
 #include <QIcon>
 #include <QMimeData>
 
-#include "gui/config/Screen.h"
-
 const QString ScreenSetupModel::m_MimeType = "application/x-deskflow-screen";
 
 ScreenSetupModel::ScreenSetupModel(ScreenList &screens, int numColumns, int numRows)
@@ -22,17 +23,19 @@ ScreenSetupModel::ScreenSetupModel(ScreenList &screens, int numColumns, int numR
       m_NumColumns(numColumns),
       m_NumRows(numRows)
 {
-
-  // bound rows and columns to prevent multiply overflow.
-  // this is unlikely to happen, as the grid size is only 3x9.
-  if (m_NumColumns > 100 || m_NumRows > 100) {
-    qFatal("grid size out of bounds: %d columns x %d rows", m_NumColumns, m_NumRows);
-    return;
+  // bound the grid so that multiplying columns by rows cannot overflow.
+  if (m_NumColumns < 1 || m_NumColumns > kMaxGridSize || m_NumRows < 1 || m_NumRows > kMaxGridSize) {
+    qCritical("grid size out of bounds: %d columns x %d rows", m_NumColumns, m_NumRows);
+    m_NumColumns = kServerGridWidth;
+    m_NumRows = kServerGridHeight;
   }
 
-  const long span = static_cast<long>(m_NumColumns) * m_NumRows;
-  if (span > screens.size()) {
-    qFatal("scrren list (%lld) too small for %d columns x %d rows", screens.size(), m_NumColumns, m_NumRows);
+  const int span = m_NumColumns * m_NumRows;
+  if (span > m_Screens.size()) {
+    qCritical(
+        "screen list too small for grid, screens: %lld, cells: %d", static_cast<long long>(m_Screens.size()), span
+    );
+    m_Screens.resize(span);
   }
 }
 

src/lib/gui/ScreenSetupModel.h

@@ -79,9 +79,11 @@ protected:
   void addScreen(const Screen &newScreen);
 
 private:
+  static constexpr int kMaxGridSize = 100;
+
   ScreenList &m_Screens;
-  const int m_NumColumns;
-  const int m_NumRows;
+  int m_NumColumns;
+  int m_NumRows;
 
   static const QString m_MimeType;
 };

src/lib/gui/core/CoreProcess.cpp

@@ -105,8 +105,7 @@ CoreProcess::CoreProcess(const ServerConfig &serverConfig)
 {
   m_appPath = QStringLiteral("%1/%2").arg(QCoreApplication::applicationDirPath(), kCoreBinName);
   if (!QFile::exists(m_appPath)) {
-    qFatal("core server binary does not exist");
-    return;
+    qCritical("core server binary does not exist");
   }
 
   connect(m_daemonIpcClient, &ipc::DaemonIpcClient::connected, this, &CoreProcess::daemonIpcClientConnected);
@@ -216,7 +215,8 @@ void CoreProcess::startForegroundProcess(const QStringList &args)
   using enum ProcessState;
 
   if (m_processState != Starting) {
-    qFatal("core process must be in starting state");
+    qCritical("not starting core desktop process, unexpected process state");
+    return;
   }
 
   // only make quoted args for printing the command for convenience; so that the
@@ -245,7 +245,8 @@ void CoreProcess::startForegroundProcess(const QStringList &args)
 void CoreProcess::startProcessFromDaemon()
 {
   if (m_processState != ProcessState::Starting) {
-    qFatal("core process must be in starting state");
+    qCritical("not starting core process from daemon, unexpected process state");
+    return;
   }
 
   const auto configFile = Settings::settingsFile();
@@ -271,11 +272,13 @@ void CoreProcess::startProcessFromDaemon()
 void CoreProcess::stopForegroundProcess() const
 {
   if (m_processState != ProcessState::Stopping) {
-    qFatal("core process must be in stopping state");
+    qCritical("not stopping core desktop process, unexpected process state");
+    return;
   }
 
   if (!m_process) {
-    qFatal("process not set, cannot stop");
+    qCritical("not stopping core desktop process, no process to stop");
+    return;
   }
 
   qInfo("stopping core desktop process");
@@ -291,7 +294,8 @@ void CoreProcess::stopForegroundProcess() const
 void CoreProcess::stopProcessFromDaemon()
 {
   if (m_processState != ProcessState::Stopping) {
-    qFatal("core process must be in stopping state");
+    qCritical("not stopping core process from daemon, unexpected process state");
+    return;
   }
 
   auto sendStop = [this] {
@@ -348,12 +352,12 @@ void CoreProcess::handleLogLines(const QString &text)
 void CoreProcess::start(std::optional<ProcessMode> processModeOption)
 {
   if (m_processState == ProcessState::Started) {
-    qCritical("core process already started");
+    qCritical("not starting core process, already started");
     return;
   }
 
   if (m_mode == Settings::CoreMode::None) {
-    qFatal("set core mode before starting");
+    qCritical("not starting core process, no core mode set");
     return;
   }
 
@@ -391,7 +395,10 @@ void CoreProcess::start(std::optional<ProcessMode> processModeOption)
   if (m_mode == Settings::CoreMode::Server) {
     const auto [hasNeededPermissions, configFilename] = persistServerConfig();
     if (configFilename.isEmpty()) {
-      qFatal("config file name empty for server args");
+      qCritical("not starting core process, no server config file");
+      setProcessState(ProcessState::Stopped);
+      setConnectionState(ConnectionState::Disconnected);
+      Q_EMIT error(Error::StartFailed);
       return;
     }
     if (!hasNeededPermissions) {
@@ -654,7 +661,8 @@ void CoreProcess::clearSettings()
   }
 
   if (processMode != ProcessMode::Service) {
-    qFatal("invalid process mode");
+    qCritical("not clearing core settings, unexpected process mode");
+    return;
   }
 
   qInfo("clearing core settings through daemon");

src/lib/gui/dialogs/SettingsDialog.cpp

@@ -351,7 +351,8 @@ bool SettingsDialog::isClientMode() const
 void SettingsDialog::updateKeyLengthOnFile(const QString &path)
 {
   if (!QFile(path).exists()) {
-    qFatal("tls certificate file not found: %s", qUtf8Printable(path));
+    qCritical("tls certificate file not found: %s", qUtf8Printable(path));
+    return;
   }
 
   auto length = TlsUtility::getCertKeyLength(path);

src/lib/gui/validators/LineEditValidator.cpp

@@ -21,7 +21,7 @@ LineEditValidator::LineEditValidator(QLineEdit *lineEdit, ValidationError *error
 {
 
   if (!m_pLineEdit) {
-    qFatal("validator line edit not set");
+    qCritical("validator line edit not set");
   }
 }
 
@@ -32,7 +32,10 @@ void LineEditValidator::addValidator(std::unique_ptr<IStringValidator> validator
 
 QValidator::State LineEditValidator::validate(QString &input, int &) const
 {
-  assert(m_pLineEdit);
+  if (!m_pLineEdit) {
+    qCritical("cannot validate input, no line edit set");
+    return Intermediate;
+  }
 
   QString errorMessage;
   for (const auto &validator : m_Validators) {