Only close popup in the the hierchary

Imagine following event sequences:
1. a tooltip is shown. activePopups = {tooltip}
2. user click menu bar to show the menu, QMenu::setVisible is called.
    now activePopups(tooltip, menu}
3. tooltip visibility changed to false.
4. closePopups() close both tooltip and menu.

This is a common pattern under wayland that menu is shown as a invisible
state. This patch tries to memorize the surface hierchary used to create
the popup role. And only close those popups whose ancesotor is hidden.

Change-Id: I78aa0b4e32a5812603e003e756d8bcd202e94af4
Reviewed-by: David Edmundson <davidedmundson@kde.org>
(cherry picked from commit f8e3257e9b1e22d52e9c221c62b8d9b6dd1151a3)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

4 files changed, 40 insertions, 26 deletions

diff --git a/src/client/qwaylandwindow.cpp b/src/client/qwaylandwindow.cpp
index d669e839..27572185 100644
--- a/src/client/qwaylandwindow.cpp
+++ b/src/client/qwaylandwindow.cpp
@@ -215,6 +215,7 @@ void QWaylandWindow::endFrame()
 
 void QWaylandWindow::reset()
 {
+    closeChildPopups();
     delete mShellSurface;
     mShellSurface = nullptr;
     delete mSubSurfaceWindow;
@@ -429,20 +430,6 @@ void QWaylandWindow::sendExposeEvent(const QRect &rect)
     mLastExposeGeometry = rect;
 }
 
-static QList<QPointer<QWaylandWindow>> activePopups;
-
-void QWaylandWindow::closePopups(QWaylandWindow *parent)
-{
-    while (!activePopups.isEmpty()) {
-        auto popup = activePopups.takeLast();
-        if (popup.isNull())
-            continue;
-        if (popup.data() == parent)
-            return;
-        popup->reset();
-    }
-}
-
 QPlatformScreen *QWaylandWindow::calculateScreenFromSurfaceEvents() const
 {
     QReadLocker lock(&mSurfaceLock);
@@ -462,8 +449,6 @@ void QWaylandWindow::setVisible(bool visible)
     lastVisible = visible;
 
     if (visible) {
-        if (window()->type() == Qt::Popup || window()->type() == Qt::ToolTip)
-            activePopups << this;
         initWindow();
 
         setGeometry(windowGeometry());
@@ -472,7 +457,6 @@ void QWaylandWindow::setVisible(bool visible)
         // QWaylandShmBackingStore::beginPaint().
     } else {
         sendExposeEvent(QRect());
-        closePopups(this);
         reset();
     }
 }
@@ -1520,6 +1504,21 @@ void QWaylandWindow::setXdgActivationToken(const QString &token)
 {
     mShellSurface->setXdgActivationToken(token);
 }
+
+void QWaylandWindow::addChildPopup(QWaylandWindow *surface) {
+    mChildPopups.append(surface);
+}
+
+void QWaylandWindow::removeChildPopup(QWaylandWindow *surface) {
+    mChildPopups.removeAll(surface);
+}
+
+void QWaylandWindow::closeChildPopups() {
+    while (!mChildPopups.isEmpty()) {
+        auto popup = mChildPopups.takeLast();
+        popup->reset();
+    }
+}
 }
 
 QT_END_NAMESPACE
diff --git a/src/client/qwaylandwindow_p.h b/src/client/qwaylandwindow_p.h
index d2d4d659..ea30d9b8 100644
--- a/src/client/qwaylandwindow_p.h
+++ b/src/client/qwaylandwindow_p.h
@@ -206,6 +206,10 @@ public:
     void beginFrame();
     void endFrame();
 
+    void addChildPopup(QWaylandWindow* child);
+    void removeChildPopup(QWaylandWindow* child);
+    void closeChildPopups();
+
 public slots:
     void applyConfigure();
 
@@ -292,6 +296,8 @@ protected:
 
     QMargins mCustomMargins;
 
+    QList<QPointer<QWaylandWindow>> mChildPopups;
+
 private:
     void setGeometry_helper(const QRect &rect);
     void initWindow();
diff --git a/src/plugins/shellintegration/xdg-shell/qwaylandxdgshell.cpp b/src/plugins/shellintegration/xdg-shell/qwaylandxdgshell.cpp
index e227971b..e3dee445 100644
--- a/src/plugins/shellintegration/xdg-shell/qwaylandxdgshell.cpp
+++ b/src/plugins/shellintegration/xdg-shell/qwaylandxdgshell.cpp
@@ -174,12 +174,17 @@ QtWayland::xdg_toplevel::resize_edge QWaylandXdgSurface::Toplevel::convertToResi
                 | ((edges & Qt::RightEdge) ? resize_edge_right : 0));
 }
 
-QWaylandXdgSurface::Popup::Popup(QWaylandXdgSurface *xdgSurface, QWaylandXdgSurface *parent,
+QWaylandXdgSurface::Popup::Popup(QWaylandXdgSurface *xdgSurface, QWaylandWindow *parent,
                                  QtWayland::xdg_positioner *positioner)
-    : xdg_popup(xdgSurface->get_popup(parent ? parent->object() : nullptr, positioner->object()))
-    , m_xdgSurface(xdgSurface)
+    : m_xdgSurface(xdgSurface)
+    , m_parentXdgSurface(qobject_cast<QWaylandXdgSurface *>(parent->shellSurface()))
     , m_parent(parent)
 {
+
+    init(xdgSurface->get_popup(m_parentXdgSurface ? m_parentXdgSurface->object() : nullptr, positioner->object()));
+    if (m_parent) {
+        m_parent->addChildPopup(m_xdgSurface->window());
+    }
 }
 
 QWaylandXdgSurface::Popup::~Popup()
@@ -187,10 +192,14 @@ QWaylandXdgSurface::Popup::~Popup()
     if (isInitialized())
         destroy();
 
+    if (m_parent) {
+        m_parent->removeChildPopup(m_xdgSurface->window());
+    }
+
     if (m_grabbing) {
         auto *shell = m_xdgSurface->m_shell;
         Q_ASSERT(shell->m_topmostGrabbingPopup == this);
-        shell->m_topmostGrabbingPopup = m_parent ? m_parent->m_popup : nullptr;
+        shell->m_topmostGrabbingPopup = m_parentXdgSurface ? m_parentXdgSurface->m_popup : nullptr;
         m_grabbing = false;
 
         // Synthesize Qt enter/leave events for popup
@@ -396,8 +405,6 @@ void QWaylandXdgSurface::setPopup(QWaylandWindow *parent)
 {
     Q_ASSERT(!m_toplevel && !m_popup);
 
-    auto parentXdgSurface = qobject_cast<QWaylandXdgSurface *>(parent->shellSurface());
-
     auto positioner = new QtWayland::xdg_positioner(m_shell->create_positioner());
     // set_popup expects a position relative to the parent
     QPoint transientPos = m_window->geometry().topLeft(); // this is absolute
@@ -414,8 +421,9 @@ void QWaylandXdgSurface::setPopup(QWaylandWindow *parent)
         | QtWayland::xdg_positioner::constraint_adjustment_slide_y
         | QtWayland::xdg_positioner::constraint_adjustment_flip_x
         | QtWayland::xdg_positioner::constraint_adjustment_flip_y);
-    m_popup = new Popup(this, parentXdgSurface, positioner);
+    m_popup = new Popup(this, parent, positioner);
     positioner->destroy();
+
     delete positioner;
 }
 
diff --git a/src/plugins/shellintegration/xdg-shell/qwaylandxdgshell_p.h b/src/plugins/shellintegration/xdg-shell/qwaylandxdgshell_p.h
index 30366168..8410253c 100644
--- a/src/plugins/shellintegration/xdg-shell/qwaylandxdgshell_p.h
+++ b/src/plugins/shellintegration/xdg-shell/qwaylandxdgshell_p.h
@@ -102,14 +102,15 @@ private:
 
     class Popup : public QtWayland::xdg_popup {
     public:
-        Popup(QWaylandXdgSurface *xdgSurface, QWaylandXdgSurface *parent, QtWayland::xdg_positioner *positioner);
+        Popup(QWaylandXdgSurface *xdgSurface, QWaylandWindow *parent, QtWayland::xdg_positioner *positioner);
         ~Popup() override;
 
         void grab(QWaylandInputDevice *seat, uint serial);
         void xdg_popup_popup_done() override;
 
         QWaylandXdgSurface *m_xdgSurface = nullptr;
-        QWaylandXdgSurface *m_parent = nullptr;
+        QWaylandXdgSurface *m_parentXdgSurface = nullptr;
+        QWaylandWindow *m_parent = nullptr;
         bool m_grabbing = false;
     };