Clang: Activate the code model with a check box

If the plugin is not activated, show a hint.

The underlying settings are still mime type based. This will be
addressed in a follow-up change.

Change-Id: I24b232365d505a0022a78e96eb496d219a8b7c5b
Reviewed-by: Christian Stenger <christian.stenger@theqtcompany.com>
Reviewed-by: Eike Ziller <eike.ziller@theqtcompany.com>

src/plugins/cpptools/cppcodemodelsettingspage.cpp

@@ -58,41 +58,16 @@ void CppCodeModelSettingsWidget::setSettings(const QSharedPointer<CppCodeModelSe
 {
     m_settings = s;
 
-    applyToWidget(m_ui->cChooser, QLatin1String(Constants::C_SOURCE_MIMETYPE));
+    setupClangCodeModelWidgets();
-    applyToWidget(m_ui->cppChooser, QLatin1String(Constants::CPP_SOURCE_MIMETYPE));
-    applyToWidget(m_ui->objcChooser, QLatin1String(Constants::OBJECTIVE_C_SOURCE_MIMETYPE));
-    applyToWidget(m_ui->objcppChooser, QLatin1String(Constants::OBJECTIVE_CPP_SOURCE_MIMETYPE));
-    applyToWidget(m_ui->hChooser, QLatin1String(Constants::C_HEADER_MIMETYPE));
-
     m_ui->ignorePCHCheckBox->setChecked(s->pchUsage() == CppCodeModelSettings::PchUse_None);
 }
 
-void CppCodeModelSettingsWidget::applyToWidget(QComboBox *chooser, const QString &mimeType) const
-{
-    chooser->clear();
-
-    QStringList names = m_settings->availableModelManagerSupportProvidersByName().keys();
-    Utils::sort(names);
-    foreach (const QString &name, names) {
-        const QString &id = m_settings->availableModelManagerSupportProvidersByName()[name];
-        chooser->addItem(name, id);
-        if (id == m_settings->modelManagerSupportIdForMimeType(mimeType))
-            chooser->setCurrentIndex(chooser->count() - 1);
-    }
-    chooser->setEnabled(names.size() > 1);
-}
-
 void CppCodeModelSettingsWidget::applyToSettings() const
 {
     bool changed = false;
-    changed |= applyToSettings(m_ui->cChooser, QLatin1String(Constants::C_SOURCE_MIMETYPE));
+
-    changed |= applyToSettings(m_ui->cppChooser, QLatin1String(Constants::CPP_SOURCE_MIMETYPE));
+    if (applyClangCodeModelWidgetsToSettings())
-    changed |= applyToSettings(m_ui->objcChooser,
+        changed = true;
-                               QLatin1String(Constants::OBJECTIVE_C_SOURCE_MIMETYPE));
-    changed |= applyToSettings(m_ui->objcppChooser,
-                               QLatin1String(Constants::OBJECTIVE_CPP_SOURCE_MIMETYPE));
-    changed |= applyToSettings(m_ui->hChooser,
-                               QLatin1String(Constants::C_HEADER_MIMETYPE));
 
     if (m_ui->ignorePCHCheckBox->isChecked() !=
             (m_settings->pchUsage() == CppCodeModelSettings::PchUse_None)) {
@@ -106,14 +81,38 @@ void CppCodeModelSettingsWidget::applyToSettings() const
         m_settings->toSettings(Core::ICore::settings());
 }
 
-bool CppCodeModelSettingsWidget::applyToSettings(QComboBox *chooser, const QString &mimeType) const
+static bool isClangCodeModelActive(const CppCodeModelSettings &settings)
 {
-    QString newId = chooser->itemData(chooser->currentIndex()).toString();
+    const QString currentCodeModelId
-    QString currentId = m_settings->modelManagerSupportIdForMimeType(mimeType);
+        = settings.modelManagerSupportIdForMimeType(QLatin1String(Constants::CPP_SOURCE_MIMETYPE));
-    if (newId == currentId)
+    return currentCodeModelId != settings.defaultId();
-        return false;
+}
+
+void CppCodeModelSettingsWidget::setupClangCodeModelWidgets() const
+{
+    bool isClangActive = false;
+    const bool isClangAvailable = m_settings->availableModelManagerSupportProvidersByName().size() > 1;
+    if (isClangAvailable)
+        isClangActive = isClangCodeModelActive(*m_settings.data());
+
+    m_ui->activateClangCodeModelPluginHint->setVisible(!isClangAvailable);
+    m_ui->useClangCheckBox->setEnabled(isClangAvailable);
+    m_ui->useClangCheckBox->setChecked(isClangActive);
+}
+
+bool CppCodeModelSettingsWidget::applyClangCodeModelWidgetsToSettings() const
+{
+    // Once the underlying settings are not mime type based anymore, simplify here.
+    // Until then, ensure that the settings are set uniformly for all the mime types
+    // to avoid surprises.
+
+    const QString activeCodeModelId = m_ui->useClangCheckBox->isChecked()
+            ? QLatin1String("ClangCodeMode.ClangCodeMode")
+            : QLatin1String("CppTools.BuiltinCodeModel");
+
+    foreach (const QString &mimeType, m_settings->supportedMimeTypes())
+        m_settings->setModelManagerSupportIdForMimeType(mimeType, activeCodeModelId);
 
-    m_settings->setModelManagerSupportIdForMimeType(mimeType, newId);
     return true;
 }
 

src/plugins/cpptools/cppcodemodelsettingspage.h

@@ -58,8 +58,8 @@ public:
     void applyToSettings() const;
 
 private:
-    bool applyToSettings(QComboBox *chooser, const QString &mimeType) const;
+    void setupClangCodeModelWidgets() const;
-    void applyToWidget(QComboBox *chooser, const QString &mimeType) const;
+    bool applyClangCodeModelWidgetsToSettings() const;
 
 private:
     Ui::CppCodeModelSettingsPage *m_ui;

src/plugins/cpptools/cppcodemodelsettingspage.ui

@@ -20,70 +20,23 @@
       <string>Code Completion and Semantic Highlighting</string>
      </property>
      <layout class="QFormLayout" name="formLayout">
-      <item row="0" column="0">
+      <property name="fieldGrowthPolicy">
-       <widget class="QLabel" name="cLabel">
+       <enum>QFormLayout::AllNonFixedFieldsGrow</enum>
-        <property name="text">
-         <string>C</string>
       </property>
-       </widget>
-      </item>
-      <item row="0" column="1">
-       <widget class="QComboBox" name="cChooser">
-        <property name="sizePolicy">
-         <sizepolicy hsizetype="Expanding" vsizetype="Fixed">
-          <horstretch>0</horstretch>
-          <verstretch>0</verstretch>
-         </sizepolicy>
-        </property>
-       </widget>
-      </item>
       <item row="1" column="0">
-       <widget class="QLabel" name="cppLabel">
+       <widget class="QCheckBox" name="useClangCheckBox">
         <property name="text">
-         <string>C++</string>
+         <string>Use Clang Code Model</string>
         </property>
        </widget>
       </item>
-      <item row="1" column="1">
+      <item row="0" column="0">
-       <widget class="QComboBox" name="cppChooser">
+       <widget class="QLabel" name="activateClangCodeModelPluginHint">
-        <property name="sizePolicy">
-         <sizepolicy hsizetype="MinimumExpanding" vsizetype="Fixed">
-          <horstretch>0</horstretch>
-          <verstretch>0</verstretch>
-         </sizepolicy>
-        </property>
-       </widget>
-      </item>
-      <item row="2" column="0">
-       <widget class="QLabel" name="objcLabel">
         <property name="text">
-         <string>Objective C</string>
+         <string>&lt;i&gt;Activate the Clang Code Model plugin to enable the options here.&lt;/i&gt;</string>
         </property>
        </widget>
       </item>
-      <item row="2" column="1">
-       <widget class="QComboBox" name="objcChooser"/>
-      </item>
-      <item row="3" column="0">
-       <widget class="QLabel" name="objcppLabel">
-        <property name="text">
-         <string>Objective C++</string>
-        </property>
-       </widget>
-      </item>
-      <item row="3" column="1">
-       <widget class="QComboBox" name="objcppChooser"/>
-      </item>
-      <item row="4" column="0">
-       <widget class="QLabel" name="hLabel">
-        <property name="text">
-         <string>Headers</string>
-        </property>
-       </widget>
-      </item>
-      <item row="4" column="1">
-       <widget class="QComboBox" name="hChooser"/>
-      </item>
      </layout>
     </widget>
    </item>