Terminal: Allow the underlying application to set title

Change-Id: I3530d645f16047df2546902d900e5e2fee8d071c
Reviewed-by: Marcus Tillmanns <marcus.tillmanns@qt.io>

src/plugins/terminal/terminalpane.cpp

@@ -219,23 +219,15 @@ void TerminalPane::setupTerminalWidget(TerminalWidget *terminal)
     if (!terminal)
         return;
 
-    const auto setTabText = [this, terminal]() {
+    const auto setTabText = [this, terminal] {
         const int index = m_tabWidget.indexOf(terminal);
-        const FilePath cwd = terminal->cwd();
-
-        const QString exe = terminal->currentCommand().isEmpty()
-                                ? terminal->shellName()
-                                : terminal->currentCommand().executable().fileName();
-
-        if (cwd.isEmpty())
-            m_tabWidget.setTabText(index, exe);
-        else
-            m_tabWidget.setTabText(index, exe + " - " + cwd.fileName());
+        m_tabWidget.setTabText(index, terminal->title());
     };
 
     connect(terminal, &TerminalWidget::started, this, setTabText);
     connect(terminal, &TerminalWidget::cwdChanged, this, setTabText);
     connect(terminal, &TerminalWidget::commandChanged, this, setTabText);
+    connect(terminal, &TerminalWidget::titleChanged, this, setTabText);
 
     if (!terminal->shellName().isEmpty())
         setTabText();

src/plugins/terminal/terminalsurface.cpp

@@ -249,6 +249,7 @@ struct TerminalSurfacePrivate
         case VTERM_PROP_ICONNAME:
             break;
         case VTERM_PROP_TITLE:
+            emit q->titleChanged(QString::fromUtf8(val->string.str, val->string.len));
             break;
         case VTERM_PROP_ALTSCREEN:
             m_altscreen = val->boolean;

src/plugins/terminal/terminalsurface.h

@@ -103,6 +103,7 @@ signals:
     void altscreenChanged(bool altScreen);
     void unscroll();
     void bell();
+    void titleChanged(const QString &title);
 
 private:
     std::unique_ptr<TerminalSurfacePrivate> d;

src/plugins/terminal/terminalwidget.cpp

@@ -399,6 +399,18 @@ void TerminalWidget::setupSurface()
         if (TerminalSettings::instance().audibleBell.value())
             QApplication::beep();
     });
+    connect(m_surface.get(),
+            &Internal::TerminalSurface::titleChanged,
+            this,
+            [this](const QString &title) {
+                const FilePath titleFile = FilePath::fromUserInput(title);
+                if (!m_title.isEmpty()
+                    || m_openParameters.shellCommand.value_or(CommandLine{}).executable()
+                           != titleFile) {
+                    m_title = titleFile.isFile() ? titleFile.baseName() : title;
+                }
+                emit titleChanged();
+            });
 
     if (m_shellIntegration) {
         connect(m_shellIntegration.get(),
@@ -442,6 +454,17 @@ QColor TerminalWidget::toQColor(std::variant<int, QColor> color) const
     return std::get<QColor>(color);
 }
 
+QString TerminalWidget::title() const
+{
+    const FilePath dir = cwd();
+    QString title = m_title;
+    if (title.isEmpty())
+        title = currentCommand().isEmpty() ? shellName() : currentCommand().executable().fileName();
+    if (dir.isEmpty())
+        return title;
+    return title + " - " + dir.fileName();
+}
+
 void TerminalWidget::updateCopyState()
 {
     if (!hasFocus())

src/plugins/terminal/terminalwidget.h

@@ -82,6 +82,7 @@ public:
 
     void setShellName(const QString &shellName);
     QString shellName() const;
+    QString title() const;
 
     Utils::FilePath cwd() const;
     Utils::CommandLine currentCommand() const;
@@ -98,6 +99,7 @@ signals:
     void started(qint64 pid);
     void cwdChanged(const Utils::FilePath &cwd);
     void commandChanged(const Utils::CommandLine &cmd);
+    void titleChanged();
 
 protected:
     void paintEvent(QPaintEvent *event) override;
@@ -207,6 +209,7 @@ private:
     bool m_ignoreScroll{false};
 
     QString m_preEditString;
+    QString m_title;
 
     std::optional<Selection> m_selection;
     std::optional<LinkSelection> m_linkSelection;

src/plugins/terminal/tests/title

@@ -0,0 +1,4 @@
+#!/bin/bash
+
+echo -e "\033[1m ⎆ The terminal title should have changed to 'Test Title'\033[0m"
+echo -e "\033]0;Test Title\007"