Editors: Set window title for external editor windows

Change-Id: I54ed77c0f1b2122ae8833109d8dcac7d8eec7ac4
Task-number: QTCREATORBUG-9612
Reviewed-by: Daniel Teske <daniel.teske@digia.com>

9 files changed, 168 insertions, 53 deletions

diff --git a/src/plugins/coreplugin/editormanager/editorarea.cpp b/src/plugins/coreplugin/editormanager/editorarea.cpp
index 54c9f8b21f..b5f8956a44 100644
--- a/src/plugins/coreplugin/editormanager/editorarea.cpp
+++ b/src/plugins/coreplugin/editormanager/editorarea.cpp
@@ -29,26 +29,99 @@
 
 #include "editorarea.h"
 
+#include "editormanager.h"
+#include "ieditor.h"
+
 #include <coreplugin/coreconstants.h>
 #include <coreplugin/icontext.h>
 #include <coreplugin/icore.h>
+#include <utils/qtcassert.h>
+
+#include <QApplication>
 
 namespace Core {
 namespace Internal {
 
 EditorArea::EditorArea()
+    : m_currentView(0),
+      m_currentDocument(0)
 {
     m_context = new IContext;
     m_context->setContext(Context(Constants::C_EDITORMANAGER));
     m_context->setWidget(this);
     ICore::addContextObject(m_context);
+
+    setCurrentView(view());
+
+    connect(qApp, &QApplication::focusChanged,
+            this, &EditorArea::focusChanged);
 }
 
 EditorArea::~EditorArea()
 {
+    // disconnect
+    setCurrentView(0);
+    disconnect(qApp, &QApplication::focusChanged,
+               this, &EditorArea::focusChanged);
+
     ICore::removeContextObject(m_context);
     delete m_context;
 }
 
+IDocument *EditorArea::currentDocument() const
+{
+    return m_currentDocument;
+}
+
+void EditorArea::focusChanged(QWidget *old, QWidget *now)
+{
+    Q_UNUSED(old)
+    // only interesting if the focus moved within the editor area
+    if (!focusWidget() || focusWidget() != now)
+        return;
+    // find the view with focus
+    EditorView *current = findFirstView();
+    while (current) {
+        if (current->focusWidget() && current->focusWidget() == now) {
+            setCurrentView(current);
+            break;
+        }
+        current = current->findNextView();
+    }
+}
+
+void EditorArea::setCurrentView(EditorView *view)
+{
+    if (view == m_currentView)
+        return;
+    if (m_currentView) {
+        disconnect(m_currentView.data(), &EditorView::currentEditorChanged,
+                   this, &EditorArea::updateCurrentEditor);
+    }
+    m_currentView = view;
+    if (m_currentView) {
+        connect(m_currentView.data(), &EditorView::currentEditorChanged,
+                this, &EditorArea::updateCurrentEditor);
+    }
+    updateCurrentEditor(m_currentView ? m_currentView->currentEditor() : 0);
+}
+
+void EditorArea::updateCurrentEditor(IEditor *editor)
+{
+    IDocument *document = editor ? editor->document() : 0;
+    if (document == m_currentDocument)
+        return;
+    if (m_currentDocument) {
+        disconnect(m_currentDocument.data(), &IDocument::changed,
+                   this, &EditorArea::windowTitleNeedsUpdate);
+    }
+    m_currentDocument = document;
+    if (m_currentDocument) {
+        connect(m_currentDocument.data(), &IDocument::changed,
+                this, &EditorArea::windowTitleNeedsUpdate);
+    }
+    emit windowTitleNeedsUpdate();
+}
+
 } // Internal
 } // Core
diff --git a/src/plugins/coreplugin/editormanager/editorarea.h b/src/plugins/coreplugin/editormanager/editorarea.h
index 0bdffbfb69..2c9d2e04f9 100644
--- a/src/plugins/coreplugin/editormanager/editorarea.h
+++ b/src/plugins/coreplugin/editormanager/editorarea.h
@@ -32,6 +32,8 @@
 
 #include "editorview.h"
 
+#include <QPointer>
+
 namespace Core {
 
 class IContext;
@@ -46,8 +48,19 @@ public:
     EditorArea();
     ~EditorArea();
 
+    IDocument *currentDocument() const;
+
+signals:
+    void windowTitleNeedsUpdate();
+
 private:
+    void focusChanged(QWidget *old, QWidget *now);
+    void setCurrentView(EditorView *view);
+    void updateCurrentEditor(IEditor *editor);
+
     IContext *m_context;
+    QPointer<EditorView> m_currentView;
+    QPointer<IDocument> m_currentDocument;
 };
 
 } // Internal
diff --git a/src/plugins/coreplugin/editormanager/editormanager.cpp b/src/plugins/coreplugin/editormanager/editormanager.cpp
index afffbd9f55..9e5d7715ef 100644
--- a/src/plugins/coreplugin/editormanager/editormanager.cpp
+++ b/src/plugins/coreplugin/editormanager/editormanager.cpp
@@ -451,6 +451,8 @@ void EditorManagerPrivate::init()
     // other setup
     auto mainEditorArea = new EditorArea();
     mainEditorArea->hide();
+    connect(mainEditorArea, &EditorArea::windowTitleNeedsUpdate,
+            this, &EditorManagerPrivate::updateWindowTitle);
     connect(mainEditorArea, SIGNAL(destroyed(QObject*)), this, SLOT(editorAreaDestroyed(QObject*)));
     d->m_editorAreas.append(mainEditorArea);
     d->m_currentView = mainEditorArea->view();
@@ -491,7 +493,7 @@ void EditorManagerPrivate::init()
         });
 }
 
-QWidget *EditorManagerPrivate::mainEditorArea()
+EditorArea *EditorManagerPrivate::mainEditorArea()
 {
     return d->m_editorAreas.at(0);
 }
@@ -1065,7 +1067,6 @@ void EditorManagerPrivate::setCurrentEditor(IEditor *editor, bool ignoreNavigati
         EditorView::updateEditorHistory(editor, d->m_globalHistory);
     }
     updateActions();
-    updateWindowTitle();
     emit m_instance->currentEditorChanged(editor);
 }
 
@@ -1297,13 +1298,8 @@ void EditorManagerPrivate::updateActions()
     IDocument *curDocument = EditorManager::currentDocument();
     const int openedCount = DocumentModel::entryCount();
 
-    if (curDocument) {
-        if (HostOsInfo::isMacHost())
-            mainEditorArea()->window()->setWindowModified(curDocument->isModified());
+    if (curDocument)
         updateMakeWritableWarning();
-    } else /* curEditor */ if (HostOsInfo::isMacHost()) {
-        mainEditorArea()->window()->setWindowModified(false);
-    }
 
     foreach (EditorArea *area, d->m_editorAreas)
         setCloseSplitEnabled(area, area->isSplitter());
@@ -1335,32 +1331,53 @@ void EditorManagerPrivate::updateActions()
     d->m_gotoNextSplitAction->setEnabled(hasSplitter || d->m_editorAreas.size() > 1);
 }
 
-void EditorManagerPrivate::updateWindowTitle()
+void EditorManagerPrivate::updateWindowTitleForDocument(IDocument *document, QWidget *window)
 {
-    QString windowTitle = tr("Qt Creator");
+    QTC_ASSERT(window, return);
+    QString windowTitle;
     const QString dashSep = QLatin1String(" - ");
-    QString vcsTopic;
-    IDocument *document = EditorManager::currentDocument();
 
-    if (!d->m_titleVcsTopic.isEmpty())
-        vcsTopic = QLatin1String(" [") + d->m_titleVcsTopic + QLatin1Char(']');
-    if (!d->m_titleAddition.isEmpty()) {
-        windowTitle.prepend(dashSep);
-        if (!document)
-            windowTitle.prepend(vcsTopic);
-        windowTitle.prepend(d->m_titleAddition);
-    }
-    if (document) {
-        const QString documentName = document->displayName();
-        if (!documentName.isEmpty())
-            windowTitle.prepend(documentName + vcsTopic + dashSep);
-        QString filePath = QFileInfo(document->filePath()).absoluteFilePath();
-        if (!filePath.isEmpty())
-            ICore::mainWindow()->setWindowFilePath(filePath);
-    } else {
-        ICore::mainWindow()->setWindowFilePath(QString());
+    QString filePath = document ? QFileInfo(document->filePath()).absoluteFilePath()
+                              : QString();
+
+    const QString windowTitleAddition = d->m_titleAdditionHandler
+            ? d->m_titleAdditionHandler(filePath)
+            : QString();
+
+    QString windowTitleVcsTopic;
+    if (d->m_titleVcsTopicHandler)
+        windowTitleVcsTopic = d->m_titleVcsTopicHandler(filePath);
+    if (!windowTitleVcsTopic.isEmpty())
+        windowTitleVcsTopic = QStringLiteral(" [") + windowTitleVcsTopic + QStringLiteral("]");
+
+    const QString documentName = document ? document->displayName() : QString();
+
+    if (!documentName.isEmpty())
+        windowTitle.append(documentName + windowTitleVcsTopic + dashSep);
+    if (!windowTitleAddition.isEmpty()) {
+        windowTitle.append(windowTitleAddition);
+        if (documentName.isEmpty()) // vcs topic not already added
+            windowTitle.append(windowTitleVcsTopic);
+        windowTitle.append(dashSep);
+    }
+
+    windowTitle.append(tr("Qt Creator"));
+    window->window()->setWindowTitle(windowTitle);
+    window->window()->setWindowFilePath(filePath);
+
+    if (HostOsInfo::isMacHost()) {
+        if (document)
+            window->window()->setWindowModified(document->isModified());
+        else
+            window->window()->setWindowModified(false);
     }
-    ICore::mainWindow()->setWindowTitle(windowTitle);
+}
+
+void EditorManagerPrivate::updateWindowTitle()
+{
+    EditorArea *mainArea = mainEditorArea();
+    IDocument *document = mainArea->currentDocument();
+    updateWindowTitleForDocument(document, mainArea->window());
 }
 
 void EditorManagerPrivate::gotoNextDocHistory()
@@ -1444,7 +1461,6 @@ void EditorManagerPrivate::handleDocumentStateChange()
     if (!document->isModified())
         document->removeAutoSaveFile();
     if (EditorManager::currentDocument() == document) {
-        updateWindowTitle();
         emit m_instance->currentDocumentStateChanged();
     }
 }
@@ -2045,7 +2061,6 @@ bool EditorManager::closeEditors(const QList<IEditor*> &editorsToClose, bool ask
     if (!currentEditor()) {
         emit m_instance->currentEditorChanged(0);
         EditorManagerPrivate::updateActions();
-        EditorManagerPrivate::updateWindowTitle();
     }
 
     return !closingFailed;
@@ -2524,24 +2539,18 @@ qint64 EditorManager::maxTextFileSize()
     return qint64(3) << 24;
 }
 
-void EditorManager::setWindowTitleAddition(const QString &addition)
+void EditorManager::setWindowTitleAdditionHandler(WindowTitleHandler handler)
 {
-    d->m_titleAddition = addition;
-    EditorManagerPrivate::updateWindowTitle();
+    d->m_titleAdditionHandler = handler;
 }
 
-QString EditorManager::windowTitleAddition()
+void EditorManager::updateWindowTitles()
 {
-    return d->m_titleAddition;
-}
-
-void EditorManager::setWindowTitleVcsTopic(const QString &topic)
-{
-    d->m_titleVcsTopic = topic;
-    EditorManagerPrivate::updateWindowTitle();
+    foreach (EditorArea *area, d->m_editorAreas)
+        emit area->windowTitleNeedsUpdate();
 }
 
-QString EditorManager::windowTitleVcsTopic()
+void EditorManager::setWindowTitleVcsTopicHandler(WindowTitleHandler handler)
 {
-    return d->m_titleVcsTopic;
+    d->m_titleVcsTopicHandler = handler;
 }
diff --git a/src/plugins/coreplugin/editormanager/editormanager.h b/src/plugins/coreplugin/editormanager/editormanager.h
index 9dcd84117d..ece8c6ef35 100644
--- a/src/plugins/coreplugin/editormanager/editormanager.h
+++ b/src/plugins/coreplugin/editormanager/editormanager.h
@@ -41,6 +41,8 @@
 #include <QWidget>
 #include <QMenu>
 
+#include <functional>
+
 QT_BEGIN_NAMESPACE
 QT_END_NAMESPACE
 
@@ -93,6 +95,7 @@ class CORE_EXPORT EditorManager : public QObject
 public:
     typedef QList<IEditorFactory *> EditorFactoryList;
     typedef QList<IExternalEditor *> ExternalEditorList;
+    typedef std::function<QString (const QString &)> WindowTitleHandler;
 
     static EditorManager *instance();
 
@@ -160,11 +163,8 @@ public:
 
     static qint64 maxTextFileSize();
 
-    static void setWindowTitleAddition(const QString &addition);
-    static QString windowTitleAddition();
-
-    static void setWindowTitleVcsTopic(const QString &topic);
-    static QString windowTitleVcsTopic();
+    static void setWindowTitleAdditionHandler(WindowTitleHandler handler);
+    static void setWindowTitleVcsTopicHandler(WindowTitleHandler handler);
 
     static void addSaveAndCloseEditorActions(QMenu *contextMenu, DocumentModel::Entry *entry);
     static void addNativeDirAndOpenWithActions(QMenu *contextMenu, DocumentModel::Entry *entry);
@@ -189,6 +189,7 @@ public slots:
     static void gotoOtherSplit();
     static void goBackInNavigationHistory();
     static void goForwardInNavigationHistory();
+    static void updateWindowTitles();
 
 private:
     explicit EditorManager(QObject *parent);
diff --git a/src/plugins/coreplugin/editormanager/editormanager_p.h b/src/plugins/coreplugin/editormanager/editormanager_p.h
index 01cb23d337..4b840d311a 100644
--- a/src/plugins/coreplugin/editormanager/editormanager_p.h
+++ b/src/plugins/coreplugin/editormanager/editormanager_p.h
@@ -67,7 +67,7 @@ class EditorManagerPrivate : public QObject
     friend class Core::EditorManager;
 
 public:
-    static QWidget *mainEditorArea();
+    static EditorArea *mainEditorArea();
     static EditorView *currentEditorView();
     static void setCurrentEditor(IEditor *editor, bool ignoreNavigationHistory = false);
     static IEditor *openEditor(EditorView *view,
@@ -105,6 +105,8 @@ public:
 
     static void updateActions();
 
+    static void updateWindowTitleForDocument(IDocument *document, QWidget *window);
+
 public slots:
     static bool saveDocument(Core::IDocument *document);
     static bool saveDocumentAs(Core::IDocument *document);
@@ -217,8 +219,8 @@ private:
 
     IDocument::ReloadSetting m_reloadSetting;
 
-    QString m_titleAddition;
-    QString m_titleVcsTopic;
+    EditorManager::WindowTitleHandler m_titleAdditionHandler;
+    EditorManager::WindowTitleHandler m_titleVcsTopicHandler;
 
     bool m_autoSaveEnabled;
     int m_autoSaveInterval;
diff --git a/src/plugins/coreplugin/editormanager/editorview.cpp b/src/plugins/coreplugin/editormanager/editorview.cpp
index 420911dcf7..3fbb09b623 100644
--- a/src/plugins/coreplugin/editormanager/editorview.cpp
+++ b/src/plugins/coreplugin/editormanager/editorview.cpp
@@ -359,6 +359,7 @@ void EditorView::setCurrentEditor(IEditor *editor)
         m_toolBar->setCurrentEditor(0);
         m_infoBarDisplay->setInfoBar(0);
         m_container->setCurrentIndex(0);
+        emit currentEditorChanged(0);
         return;
     }
 
@@ -373,6 +374,7 @@ void EditorView::setCurrentEditor(IEditor *editor)
     updateEditorHistory(editor);
 
     m_infoBarDisplay->setInfoBar(editor->document()->infoBar());
+    emit currentEditorChanged(editor);
 }
 
 int EditorView::editorCount() const
diff --git a/src/plugins/coreplugin/editormanager/editorview.h b/src/plugins/coreplugin/editormanager/editorview.h
index 592f3e1426..08f567e1b6 100644
--- a/src/plugins/coreplugin/editormanager/editorview.h
+++ b/src/plugins/coreplugin/editormanager/editorview.h
@@ -103,6 +103,9 @@ public:
 
     static void updateEditorHistory(IEditor *editor, QList<EditLocation> &history);
 
+signals:
+    void currentEditorChanged(Core::IEditor *editor);
+
 protected:
     void paintEvent(QPaintEvent *);
     void mousePressEvent(QMouseEvent *e);
diff --git a/src/plugins/coreplugin/editormanager/editorwindow.cpp b/src/plugins/coreplugin/editormanager/editorwindow.cpp
index a25e828101..c6036de2b0 100644
--- a/src/plugins/coreplugin/editormanager/editorwindow.cpp
+++ b/src/plugins/coreplugin/editormanager/editorwindow.cpp
@@ -30,6 +30,7 @@
 #include "editorwindow.h"
 
 #include "editorarea.h"
+#include "editormanager_p.h"
 
 #include <coreplugin/icontext.h>
 #include <coreplugin/icore.h>
@@ -55,6 +56,10 @@ EditorWindow::EditorWindow(QWidget *parent) :
 
     static int windowId = 0;
     ICore::registerWindow(this, Context(Id("EditorManager.ExternalWindow.").withSuffix(++windowId)));
+
+    connect(m_area, &EditorArea::windowTitleNeedsUpdate,
+            this, &EditorWindow::updateWindowTitle);
+    updateWindowTitle();
 }
 
 EditorArea *EditorWindow::editorArea() const
@@ -62,5 +67,10 @@ EditorArea *EditorWindow::editorArea() const
     return m_area;
 }
 
+void EditorWindow::updateWindowTitle()
+{
+    EditorManagerPrivate::updateWindowTitleForDocument(m_area->currentDocument(), this);
+}
+
 } // Internal
 } // Core
diff --git a/src/plugins/coreplugin/editormanager/editorwindow.h b/src/plugins/coreplugin/editormanager/editorwindow.h
index 0ab287ed8d..eecb7586a6 100644
--- a/src/plugins/coreplugin/editormanager/editorwindow.h
+++ b/src/plugins/coreplugin/editormanager/editorwindow.h
@@ -46,6 +46,8 @@ public:
     EditorArea *editorArea() const;
 
 private:
+    void updateWindowTitle();
+
     EditorArea *m_area;
 };