debugger: The DebuggerEngine refactoring.

This replaces the (de facto) singleton engines and data handlers by classes
that are instantiated per run. The DebuggerRunControl will now create an
object of (a class derived from) DebuggerEngine that contains all the relevant
"dynamic" data.

DebuggerManager is no more. The "singleton" bits are merged into DebuggerPlugin,
whereas the data bits went to DebuggerEngine.

There is no formal notion of a "current" DebuggerEngine. However, as there's
only one DebuggerEngine at a time that has its data models connected to the
view, there's still some "de facto" notion of a "current" engine. Calling
SomeModel::setData(int role, QVariant data) with custom role is used as the
primary dispatch mechanism from the views to the "current" data models
(and the engine, as all data models know their engine).

src/plugins/debugger/debuggeruiswitcher.cpp

@@ -153,8 +153,8 @@ DebuggerUISwitcher::~DebuggerUISwitcher()
     delete d;
 }
 
-void DebuggerUISwitcher::addMenuAction(Core::Command *command, const QString &langName,
-                                       const QString &group)
+void DebuggerUISwitcher::addMenuAction(Core::Command *command,
+    const QString &langName, const QString &group)
 {
     d->m_debugMenu->addAction(command, group);
     d->m_menuCommands.insert(d->m_languages.indexOf(langName), command);
@@ -162,6 +162,9 @@ void DebuggerUISwitcher::addMenuAction(Core::Command *command, const QString &la
 
 void DebuggerUISwitcher::setActiveLanguage(const QString &langName)
 {
+    //qDebug() << "SET ACTIVE LANGUAGE: " << langName
+    //    << theDebuggerAction(SwitchLanguageAutomatically)->isChecked()
+    //    << d->m_languages;
     if (theDebuggerAction(SwitchLanguageAutomatically)->isChecked()
         && d->m_languages.contains(langName))
     {
@@ -173,6 +176,7 @@ int DebuggerUISwitcher::activeLanguageId() const
 {
     return d->m_activeLanguage;
 }
+
 void DebuggerUISwitcher::modeChanged(Core::IMode *mode)
 {
     d->m_isActiveMode = (mode->id() == Debugger::Constants::MODE_DEBUG);
@@ -235,6 +239,7 @@ DebuggerUISwitcher *DebuggerUISwitcher::instance()
 
 void DebuggerUISwitcher::addLanguage(const QString &langName, const QList<int> &context)
 {
+    //qDebug() << "ADD UI LANGUAGE: " << langName;
     d->m_toolBars.insert(langName, 0);
     d->m_contextsForLanguage.insert(d->m_languages.count(), context);
     d->m_languages.append(langName);
@@ -250,7 +255,8 @@ void DebuggerUISwitcher::addLanguage(const QString &langName, const QList<int> &
     connect(langChange, SIGNAL(triggered()), SLOT(langChangeTriggered()));
     Core::Command *cmd = am->registerAction(langChange,
                          "Debugger.Language." + langName, d->m_globalContext);
-    cmd->setDefaultKeySequence(QKeySequence(QString("%1,%2").arg(prefix, QString::number(d->m_languages.count()))));
+    cmd->setDefaultKeySequence(QKeySequence(
+        QString("%1,%2").arg(prefix).arg(d->m_languages.count())));
 
     d->m_languageMenu->addAction(cmd);
 }
@@ -264,6 +270,7 @@ void DebuggerUISwitcher::langChangeTriggered()
 
 void DebuggerUISwitcher::changeDebuggerUI(const QString &langName)
 {
+    //qDebug() << "CHANGE DEBUGGER UI: " << langName << d->m_changingUI;
     if (d->m_changingUI)
         return;
     d->m_changingUI = true;
@@ -271,9 +278,13 @@ void DebuggerUISwitcher::changeDebuggerUI(const QString &langName)
     int langId = d->m_languages.indexOf(langName);
     if (langId != d->m_activeLanguage) {
         d->m_languageActionGroup->actions()[langId]->setChecked(true);
-        d->m_toolbarStack->setCurrentWidget(d->m_toolBars.value(langName));
+        if ((d->m_toolBars.value(langName)))
+            d->m_toolbarStack->setCurrentWidget(d->m_toolBars.value(langName));
 
         foreach (DebugToolWindow *window, d->m_dockWidgets) {
+            //qDebug() << "  WINDOW " << window->m_dockWidget->objectName()
+            //    << window->m_visible;
+
             if (window->m_languageId != langId) {
                 // visibleTo must be used because during init, debugger is not visible,
                 // although visibility is explicitly set through both default layout and
@@ -373,9 +384,11 @@ QWidget *DebuggerUISwitcher::createMainWindow(Core::BaseMode *mode)
 /*!
     Keep track of dock widgets so they can be shown/hidden for different languages
 */
-QDockWidget *DebuggerUISwitcher::createDockWidget(const QString &langName, QWidget *widget,
-                                               Qt::DockWidgetArea area, bool visibleByDefault)
+QDockWidget *DebuggerUISwitcher::createDockWidget(const QString &langName,
+    QWidget *widget, Qt::DockWidgetArea area, bool visibleByDefault)
 {
+    //qDebug() << "CREATE DOCK" << widget->objectName() << langName
+    //    << d->m_activeLanguage << "VISIBLE BY DEFAULT: " << visibleByDefault;
     QDockWidget *dockWidget = d->m_mainWindow->addDockForWidget(widget);
     d->m_mainWindow->addDockWidget(area, dockWidget);
     DebugToolWindow *window = new DebugToolWindow;
@@ -446,20 +459,23 @@ void DebuggerUISwitcher::writeSettings() const
 
 void DebuggerUISwitcher::readSettings()
 {
+    //qDebug() << "\n SWITCHER READ SETTINGS \n";
     QSettings *s = Core::ICore::instance()->settings();
     s->beginGroup(QLatin1String("DebugMode"));
     d->m_mainWindow->restoreSettings(s);
     s->endGroup();
-
+/*
     foreach(Internal::DebugToolWindow *toolWindow, d->m_dockWidgets) {
         toolWindow->m_visible = toolWindow->m_dockWidget->isVisibleTo(d->m_mainWindow);
     }
+*/
 }
 
 void DebuggerUISwitcher::initialize()
 {
     createViewsMenuItems();
 
+    //qDebug() << "UI SWITCHER INITIALIZE";
     emit dockArranged(QString());
     readSettings();
 
@@ -472,6 +488,7 @@ void DebuggerUISwitcher::initialize()
 
 void DebuggerUISwitcher::resetDebuggerLayout()
 {
+    //qDebug() << "RESET DEBUGGER LAYOUT" << d->m_languages.at(d->m_activeLanguage);
     emit dockArranged(d->m_languages.at(d->m_activeLanguage));
 }