ClangTools: Remove pointless "Disable" setting for clang-tidy

...as unchecking the root item in the tree has the same effect.

Change-Id: I960ea2c09a71dad3b0ba3dfb38a19055653354cd
Reviewed-by: Cristian Adam <cristian.adam@qt.io>

src/plugins/clangtools/clangtoolruncontrol.cpp

@@ -258,7 +258,7 @@ QList<RunnerCreator> ClangToolRunWorker::runnerCreators()
 {
     QList<RunnerCreator> creators;
 
-    if (m_diagnosticConfig.clangTidyMode() != CppTools::ClangDiagnosticConfig::TidyMode::Disabled)
+    if (m_diagnosticConfig.clangTidyChecks() != "-*")
         creators << [this]() { return createRunner<ClangTidyRunner>(); };
 
     if (!m_diagnosticConfig.clazyChecks().isEmpty()) {

src/plugins/clangtools/clangtoolssettings.cpp

@@ -118,8 +118,7 @@ ClangDiagnosticConfigs importDiagnosticConfigsFromCodeModel()
     ClangDiagnosticConfigs clangOnlyConfigs;
     std::tie(tidyClazyConfigs, clangOnlyConfigs)
         = Utils::partition(configs, [](const ClangDiagnosticConfig &config) {
-              return !config.clazyChecks().isEmpty()
-                     || config.clangTidyMode() != ClangDiagnosticConfig::TidyMode::Disabled;
+              return !config.clazyChecks().isEmpty() || config.clangTidyChecks() != "-*";
           });
 
     if (!tidyClazyConfigs.isEmpty()) {

src/plugins/clangtools/diagnosticconfigswidget.cpp

@@ -812,21 +812,16 @@ void DiagnosticConfigsWidget::syncClangTidyWidgets(const ClangDiagnosticConfig &
 
     disconnectClangTidyItemChanged();
 
-    ClangDiagnosticConfig::TidyMode tidyMode = config.clangTidyMode();
-
-    const int newIndex = tidyMode == ClangDiagnosticConfig::TidyMode::Default
-                             ? int(ClangDiagnosticConfig::TidyMode::ChecksPrefixList)
-                             : int(tidyMode);
-
-    m_tidyChecks->tidyMode->setCurrentIndex(newIndex);
+    const ClangDiagnosticConfig::TidyMode tidyMode = config.clangTidyMode();
     switch (tidyMode) {
-    case ClangDiagnosticConfig::TidyMode::Disabled:
     case ClangDiagnosticConfig::TidyMode::File:
+        m_tidyChecks->tidyMode->setCurrentIndex(1);
         m_tidyChecks->plainTextEditButton->setVisible(false);
         m_tidyChecks->stackedWidget->setCurrentIndex(TidyPages::EmptyPage);
         break;
     case ClangDiagnosticConfig::TidyMode::ChecksPrefixList:
     case ClangDiagnosticConfig::TidyMode::Default:
+        m_tidyChecks->tidyMode->setCurrentIndex(0);
         if (m_tidyInfo.supportedChecks.isEmpty()) {
             m_tidyChecks->plainTextEditButton->setVisible(false);
             m_tidyChecks->stackedWidget->setCurrentIndex(TidyPages::InvalidExecutablePage);
@@ -926,8 +921,12 @@ void DiagnosticConfigsWidget::disconnectClazyItemChanged()
 
 void DiagnosticConfigsWidget::onClangTidyModeChanged(int index)
 {
+    const ClangDiagnosticConfig::TidyMode tidyMode
+        = index == 0 ? ClangDiagnosticConfig::TidyMode::ChecksPrefixList
+                     : ClangDiagnosticConfig::TidyMode::File;
+
     ClangDiagnosticConfig config = currentConfig();
-    config.setClangTidyMode(static_cast<ClangDiagnosticConfig::TidyMode>(index));
+    config.setClangTidyMode(tidyMode);
     updateConfig(config);
     syncClangTidyWidgets(config);
 }

src/plugins/clangtools/tidychecks.ui

@@ -30,11 +30,6 @@
     <layout class="QHBoxLayout" name="horizontalLayout">
      <item>
       <widget class="QComboBox" name="tidyMode">
-       <item>
-        <property name="text">
-         <string>Disable</string>
-        </property>
-       </item>
        <item>
         <property name="text">
          <string>Select Checks</string>

src/plugins/cpptools/clangdiagnosticconfig.cpp

@@ -190,10 +190,14 @@ ClangDiagnosticConfigs diagnosticConfigsFromSettings(QSettings *s)
         config.setId(Core::Id::fromSetting(s->value(diagnosticConfigIdKey)));
         config.setDisplayName(s->value(diagnosticConfigDisplayNameKey).toString());
         config.setClangOptions(s->value(diagnosticConfigWarningsKey).toStringList());
-        config.setClangTidyMode(static_cast<ClangDiagnosticConfig::TidyMode>(
-            s->value(diagnosticConfigsTidyModeKey).toInt()));
-        config.setClangTidyChecks(
-            s->value(diagnosticConfigsTidyChecksKey).toString());
+        const int tidyModeValue = s->value(diagnosticConfigsTidyModeKey).toInt();
+        if (tidyModeValue == 0) { // Convert from settings of <= Qt Creator 4.10
+            config.setClangTidyMode(ClangDiagnosticConfig::TidyMode::ChecksPrefixList);
+            config.setClangTidyChecks("-*");
+        } else {
+            config.setClangTidyMode(static_cast<ClangDiagnosticConfig::TidyMode>(tidyModeValue));
+            config.setClangTidyChecks(s->value(diagnosticConfigsTidyChecksKey).toString());
+        }
 
         config.setClazyMode(static_cast<ClangDiagnosticConfig::ClazyMode>(
             s->value(diagnosticConfigsClazyModeKey).toInt()));

src/plugins/cpptools/clangdiagnosticconfig.h

@@ -60,8 +60,8 @@ public:
     // Clang-Tidy
     enum class TidyMode
     {
-        Disabled,
-        ChecksPrefixList,
+        // Disabled, // Used by Qt Creator 4.10 and below.
+        ChecksPrefixList = 1,
         File,
         Default,
     };
@@ -90,7 +90,7 @@ private:
     Core::Id m_id;
     QString m_displayName;
     QStringList m_clangOptions;
-    TidyMode m_clangTidyMode = TidyMode::Disabled;
+    TidyMode m_clangTidyMode = TidyMode::Default;
     QString m_clangTidyChecks;
     QString m_clazyChecks;
     ClazyMode m_clazyMode = ClazyMode::Default;