Allow nested IContexts and use it to give extra editor windows a context

The extra editor windows need to have editor manager context, otherwise
shortcuts (like ctrl+tab) do not work in them if e.g. projects mode is
active. Doing this via add/removeAdditionalContexts would be non-trivial
and error prone, so adding a context to the extra window is more
convenient. Since editors themselves already define a context, we need
to allow nesting of contexts.

Change-Id: I244eca53ebd665fd4d8fe7531e8ff701ed0b40b2
Reviewed-by: David Schulz <david.schulz@digia.com>
(cherry picked from commit deff0eb3c7)
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

src/plugins/bineditor/bineditorplugin.cpp

@@ -507,8 +507,8 @@ bool BinEditorPlugin::initialize(const QStringList &arguments, QString *errorMes
     Q_UNUSED(arguments)
     Q_UNUSED(errorMessage)
 
-    connect(Core::ICore::instance(), SIGNAL(contextAboutToChange(Core::IContext*)),
-        this, SLOT(updateCurrentEditor(Core::IContext*)));
+    connect(Core::EditorManager::instance(), SIGNAL(currentEditorChanged(Core::IEditor*)),
+        this, SLOT(updateCurrentEditor(Core::IEditor*)));
 
     addAutoReleasedObject(new BinEditorFactory(this));
     addAutoReleasedObject(new BinEditorWidgetFactory);
@@ -519,31 +519,14 @@ void BinEditorPlugin::extensionsInitialized()
 {
 }
 
-void BinEditorPlugin::updateCurrentEditor(Core::IContext *object)
+void BinEditorPlugin::updateCurrentEditor(Core::IEditor *editor)
 {
-    do {
-        if (!object) {
-            if (!m_currentEditor)
-                return;
-
-            m_currentEditor = 0;
-            break;
-        }
-        BinEditor *editor = qobject_cast<BinEditor *>(object->widget());
-        if (!editor) {
-            if (!m_currentEditor)
-                return;
-
-            m_currentEditor = 0;
-            break;
-        }
-
-        if (editor == m_currentEditor)
-            return;
-
-        m_currentEditor = editor;
-
-    } while (false);
+    BinEditor *binEditor = 0;
+    if (editor)
+        binEditor = qobject_cast<BinEditor *>(editor->widget());
+    if (m_currentEditor == binEditor)
+        return;
+    m_currentEditor = binEditor;
     updateActions();
 }
 

src/plugins/bineditor/bineditorplugin.h

@@ -76,7 +76,7 @@ private slots:
     void selectAllAction();
     void updateActions();
 
-    void updateCurrentEditor(Core::IContext *object);
+    void updateCurrentEditor(Core::IEditor *editor);
 
 private:
     Core::Context m_context;

src/plugins/bookmarks/bookmarkmanager.cpp

@@ -324,7 +324,7 @@ BookmarkManager::BookmarkManager() :
     m_bookmarkIcon(QLatin1String(":/bookmarks/images/bookmark.png")),
     m_selectionModel(new QItemSelectionModel(this, this))
 {
-    connect(Core::ICore::instance(), SIGNAL(contextChanged(Core::IContext*,Core::Context)),
+    connect(Core::ICore::instance(), SIGNAL(contextChanged(QList<Core::IContext*>,Core::Context)),
             this, SLOT(updateActionStatus()));
 
     connect(ProjectExplorerPlugin::instance()->session(), SIGNAL(sessionLoaded(QString)),

src/plugins/coreplugin/documentmanager.cpp

@@ -218,8 +218,8 @@ DocumentManager::DocumentManager(QMainWindow *mw)
     m_instance = this;
     connect(d->m_mainWindow, SIGNAL(windowActivated()),
         this, SLOT(mainWindowActivated()));
-    connect(ICore::instance(), SIGNAL(contextChanged(Core::IContext*,Core::Context)),
-        this, SLOT(syncWithEditor(Core::IContext*)));
+    connect(ICore::instance(), SIGNAL(contextChanged(QList<Core::IContext*>,Core::Context)),
+        this, SLOT(syncWithEditor(QList<Core::IContext*>)));
 
     readSettings();
 }
@@ -1061,15 +1061,20 @@ void DocumentManager::checkForReload()
 //    dump();
 }
 
-void DocumentManager::syncWithEditor(Core::IContext *context)
+void DocumentManager::syncWithEditor(const QList<Core::IContext *> &context)
 {
-    if (!context)
+    if (context.isEmpty())
         return;
 
     Core::IEditor *editor = Core::EditorManager::currentEditor();
-    if (editor && editor->widget() == context->widget()
-            && !editor->isTemporary())
-        setCurrentFile(editor->document()->fileName());
+    if (!editor || editor->isTemporary())
+        return;
+    foreach (IContext *c, context) {
+        if (editor->widget() == c->widget()) {
+            setCurrentFile(editor->document()->fileName());
+            break;
+        }
+    }
 }
 
 /*!

src/plugins/coreplugin/documentmanager.h

@@ -149,7 +149,7 @@ private slots:
     void checkForReload();
     void changedFile(const QString &file);
     void mainWindowActivated();
-    void syncWithEditor(Core::IContext *context);
+    void syncWithEditor(const QList<Core::IContext *> &context);
 };
 
 /*! The FileChangeBlocker blocks all change notifications to all IDocument * that

src/plugins/coreplugin/editormanager/editormanager.cpp

@@ -177,6 +177,7 @@ struct EditorManagerPrivate
     ~EditorManagerPrivate();
     QList<EditLocation> m_globalHistory;
     QList<Internal::SplitterOrView *> m_root;
+    QList<IContext *> m_rootContext;
     QPointer<IEditor> m_currentEditor;
     QPointer<IEditor> m_scheduledCurrentEditor;
     QPointer<EditorView> m_currentView;
@@ -272,8 +273,8 @@ EditorManager::EditorManager(QWidget *parent) :
 {
     m_instance = this;
 
-    connect(ICore::instance(), SIGNAL(contextAboutToChange(Core::IContext*)),
-            this, SLOT(handleContextChange(Core::IContext*)));
+    connect(ICore::instance(), SIGNAL(contextAboutToChange(QList<Core::IContext*>)),
+            this, SLOT(handleContextChange(QList<Core::IContext*>)));
 
     const Context editManagerContext(Constants::C_EDITORMANAGER);
     // combined context for edit & design modes
@@ -426,6 +427,7 @@ EditorManager::EditorManager(QWidget *parent) :
     // other setup
     SplitterOrView *firstRoot = new SplitterOrView();
     d->m_root.append(firstRoot);
+    d->m_rootContext.append(0);
     d->m_currentView = firstRoot->view();
 
     QHBoxLayout *layout = new QHBoxLayout(this);
@@ -458,9 +460,13 @@ EditorManager::~EditorManager()
     for (int i = 1; i < d->m_root.size(); ++i) {
         SplitterOrView *root = d->m_root.at(i);
         disconnect(root, SIGNAL(destroyed(QObject*)), this, SLOT(rootDestroyed(QObject*)));
+        IContext *rootContext = d->m_rootContext.at(i);
+        ICore::removeContextObject(rootContext);
         delete root;
+        delete rootContext;
     }
     d->m_root.clear();
+    d->m_rootContext.clear();
 
     delete d;
 }
@@ -504,12 +510,15 @@ void EditorManager::removeEditor(IEditor *editor)
     ICore::removeContextObject(editor);
 }
 
-void EditorManager::handleContextChange(Core::IContext *context)
+void EditorManager::handleContextChange(const QList<Core::IContext *> &context)
 {
     if (debugEditorManager)
         qDebug() << Q_FUNC_INFO;
     d->m_scheduledCurrentEditor = 0;
-    IEditor *editor = context ? qobject_cast<IEditor*>(context) : 0;
+    IEditor *editor = 0;
+    foreach (IContext *c, context)
+        if ((editor = qobject_cast<IEditor*>(c)))
+            break;
     if (editor && editor != d->m_currentEditor) {
         // Delay actually setting the current editor to after the current event queue has been handled
         // Without doing this, e.g. clicking into projects tree or locator would always open editors
@@ -681,6 +690,10 @@ void EditorManager::splitNewWindow(Internal::EditorView *view)
     splitter->setAttribute(Qt::WA_DeleteOnClose);
     splitter->setAttribute(Qt::WA_QuitOnClose, false); // don't prevent Qt Creator from closing
     splitter->resize(QSize(800, 600));
+    IContext *context = new IContext;
+    context->setContext(Context(Constants::C_EDITORMANAGER));
+    context->setWidget(splitter);
+    ICore::addContextObject(context);
     splitter->show();
     ICore::raiseWindow(splitter);
     if (newEditor)
@@ -688,6 +701,7 @@ void EditorManager::splitNewWindow(Internal::EditorView *view)
     else
         splitter->view()->setFocus();
     m_instance->d->m_root.append(splitter);
+    m_instance->d->m_rootContext.append(context);
     connect(splitter, SIGNAL(destroyed(QObject*)), m_instance, SLOT(rootDestroyed(QObject*)));
     m_instance->updateActions();
 }
@@ -883,10 +897,15 @@ void EditorManager::rootDestroyed(QObject *root)
     SplitterOrView *newActiveRoot = 0;
     for (int i = 0; i < d->m_root.size(); ++i) {
         SplitterOrView *r = d->m_root.at(i);
-        if (r == root)
+        if (r == root) {
             d->m_root.removeAll(r);
-        else if (r->window() == activeWin)
+            IContext *context = d->m_rootContext.at(i);
+            ICore::removeContextObject(context);
+            delete context;
+
+        } else if (r->window() == activeWin) {
             newActiveRoot = r;
+        }
     }
     // check if the destroyed root had the current view or current editor
     if (d->m_currentEditor || (d->m_currentView && d->m_currentView->parentSplitterOrView() != root))

src/plugins/coreplugin/editormanager/editormanager.h

@@ -212,7 +212,7 @@ public slots:
 private slots:
     void gotoNextDocHistory();
     void gotoPreviousDocHistory();
-    void handleContextChange(Core::IContext *context);
+    void handleContextChange(const QList<Core::IContext *> &context);
     void updateActions();
     void makeCurrentEditorWritable();
     void vcsOpenCurrentEditor();

src/plugins/coreplugin/icore.cpp

@@ -332,9 +332,9 @@
 */
 
 /*!
-    \fn void ICore::contextAboutToChange(Core::IContext *context)
+    \fn void ICore::contextAboutToChange(const QList<Core::IContext *> &context)
     \brief Sent just before a new \a context becomes the current context
-    (meaning that its widget got focus).
+    (meaning that itself or one of its child widgets got focus).
 */
 
 /*!

src/plugins/coreplugin/icore.h

@@ -146,8 +146,8 @@ signals:
     void saveSettingsRequested();
     void optionsDialogRequested();
     void coreAboutToClose();
-    void contextAboutToChange(Core::IContext *context);
-    void contextChanged(Core::IContext *context, const Core::Context &additionalContexts);
+    void contextAboutToChange(const QList<Core::IContext *> &context);
+    void contextChanged(const QList<Core::IContext *> &context, const Core::Context &additionalContexts);
 };
 
 } // namespace Core

src/plugins/coreplugin/mainwindow.cpp

@@ -143,7 +143,6 @@ MainWindow::MainWindow() :
     m_navigationWidget(0),
     m_rightPaneWidget(0),
     m_versionDialog(0),
-    m_activeContext(0),
     m_generalSettings(new GeneralSettings),
     m_shortcutSettings(new ShortcutSettings),
     m_toolSettings(new ToolSettings),
@@ -457,7 +456,7 @@ void MainWindow::openDelayedFiles()
 
 IContext *MainWindow::currentContextObject() const
 {
-    return m_activeContext;
+    return m_activeContext.isEmpty() ? 0 : m_activeContext.first();
 }
 
 QStatusBar *MainWindow::statusBar() const
@@ -1094,8 +1093,8 @@ void MainWindow::removeContextObject(IContext *context)
         return;
 
     m_contextWidgets.remove(widget);
-    if (m_activeContext == context)
-        updateContextObject(0);
+    if (m_activeContext.removeAll(context) > 0)
+        updateContextObject(m_activeContext);
 }
 
 void MainWindow::changeEvent(QEvent *e)
@@ -1129,46 +1128,39 @@ void MainWindow::updateFocusWidget(QWidget *old, QWidget *now)
     if (qobject_cast<QMenuBar*>(now) || qobject_cast<QMenu*>(now))
         return;
 
-    IContext *newContext = 0;
+    QList<IContext *> newContext;
     if (QWidget *p = qApp->focusWidget()) {
         IContext *context = 0;
         while (p) {
             context = m_contextWidgets.value(p);
-            if (context) {
-                newContext = context;
-                break;
-            }
+            if (context)
+                newContext.append(context);
             p = p->parentWidget();
         }
     }
 
     // ignore toplevels that define no context, like popups without parent
-    if (newContext || qApp->focusWidget() == focusWidget())
+    if (!newContext.isEmpty() || qApp->focusWidget() == focusWidget())
         updateContextObject(newContext);
 }
 
-void MainWindow::updateContextObject(IContext *context)
+void MainWindow::updateContextObject(const QList<IContext *> &context)
 {
-    if (context == m_activeContext)
-        return;
     emit m_coreImpl->contextAboutToChange(context);
     m_activeContext = context;
     updateContext();
-    if (debugMainWindow)
-        qDebug() << "new context object =" << context << (context ? context->widget() : 0)
-                 << (context ? context->widget()->metaObject()->className() : 0);
-}
-
-void MainWindow::resetContext()
-{
-    updateContextObject(0);
+    if (debugMainWindow) {
+        qDebug() << "new context objects =" << context;
+        foreach (IContext *c, context)
+            qDebug() << (c ? c->widget() : 0) << (c ? c->widget()->metaObject()->className() : 0);
+    }
 }
 
 void MainWindow::aboutToShutdown()
 {
     disconnect(QApplication::instance(), SIGNAL(focusChanged(QWidget*,QWidget*)),
                this, SLOT(updateFocusWidget(QWidget*,QWidget*)));
-    m_activeContext = 0;
+    m_activeContext.clear();
     hide();
 }
 
@@ -1252,8 +1244,8 @@ void MainWindow::updateContext()
 {
     Context contexts;
 
-    if (m_activeContext)
-        contexts.add(m_activeContext->context());
+    foreach (IContext *context, m_activeContext)
+        contexts.add(context->context());
 
     contexts.add(m_additionalContexts);
 

src/plugins/coreplugin/mainwindow.h

@@ -94,7 +94,6 @@ public:
     IContext *contextObject(QWidget *widget);
     void addContextObject(IContext *contex);
     void removeContextObject(IContext *contex);
-    void resetContext();
 
     Core::IDocument *openFiles(const QStringList &fileNames, ICore::OpenFilesFlags flags);
 
@@ -164,7 +163,7 @@ private slots:
     void openDelayedFiles();
 
 private:
-    void updateContextObject(IContext *context);
+    void updateContextObject(const QList<IContext *> &context);
     void updateContext();
 
     void registerDefaultContainers();
@@ -197,7 +196,7 @@ private:
     Core::StatusBarWidget *m_outputView;
     VersionDialog *m_versionDialog;
 
-    IContext *m_activeContext;
+    QList<IContext *> m_activeContext;
 
     QMap<QWidget *, IContext *> m_contextWidgets;