Send proper mouse enter events

The wl_pointer.event carries the surface local position of the pointer.
Notify Qt of it, without pretending it to be a motion event.

Change-Id: Ibbe1d125a93b478f9c350a50bfea25b01f628178
Reviewed-by: Jørgen Lind <jorgen.lind@theqtcompany.com>

4 files changed, 92 insertions, 50 deletions

diff --git a/src/client/qwaylandinputdevice.cpp b/src/client/qwaylandinputdevice.cpp
index 43c5807d4..ada2cf2b5 100644
--- a/src/client/qwaylandinputdevice.cpp
+++ b/src/client/qwaylandinputdevice.cpp
@@ -345,12 +345,17 @@ void QWaylandInputDevice::setCursor(struct wl_buffer *buffer, struct wl_cursor_i
     }
 }
 
+class EnterEvent : public QWaylandPointerEvent
+{
+public:
+    EnterEvent(const QPointF &l, const QPointF &g)
+        : QWaylandPointerEvent(QWaylandPointerEvent::Enter, 0, l, g, 0, Qt::NoModifier)
+    {}
+};
+
 void QWaylandInputDevice::Pointer::pointer_enter(uint32_t serial, struct wl_surface *surface,
                                                  wl_fixed_t sx, wl_fixed_t sy)
 {
-    Q_UNUSED(sx);
-    Q_UNUSED(sy);
-
     if (!surface)
         return;
 
@@ -358,15 +363,16 @@ void QWaylandInputDevice::Pointer::pointer_enter(uint32_t serial, struct wl_surf
     window->window()->setCursor(window->window()->cursor());
 
     mFocus = window;
+    mSurfacePos = QPointF(wl_fixed_to_double(sx), wl_fixed_to_double(sy));
+    mGlobalPos = window->window()->mapToGlobal(mSurfacePos.toPoint());
 
-    mParent->mTime = QWaylandDisplay::currentTimeMillisec();
     mParent->mSerial = serial;
     mEnterSerial = serial;
 
     QWaylandWindow *grab = QWaylandWindow::mouseGrab();
     if (!grab) {
-        window->handleMouseEnter(mParent);
-        window->handleMouse(mParent, mParent->mTime, mSurfacePos, mGlobalPos, mButtons, Qt::NoModifier);
+        EnterEvent evt(mSurfacePos, mGlobalPos);
+        window->handleMouse(mParent, evt);
     }
 }
 
@@ -387,11 +393,17 @@ void QWaylandInputDevice::Pointer::pointer_leave(uint32_t time, struct wl_surfac
     mParent->mTime = time;
 }
 
-void QWaylandInputDevice::Pointer::pointer_motion(uint32_t time, wl_fixed_t surface_x, wl_fixed_t surface_y)
+class MotionEvent : public QWaylandPointerEvent
 {
-    Q_UNUSED(surface_x);
-    Q_UNUSED(surface_y);
+public:
+    MotionEvent(ulong t, const QPointF &l, const QPointF &g, Qt::MouseButtons b, Qt::KeyboardModifiers m)
+        : QWaylandPointerEvent(QWaylandPointerEvent::Motion, t, l, g, b, m)
+    {
+    }
+};
 
+void QWaylandInputDevice::Pointer::pointer_motion(uint32_t time, wl_fixed_t surface_x, wl_fixed_t surface_y)
+{
     QWaylandWindow *window = mFocus;
 
     if (window == NULL) {
@@ -415,9 +427,12 @@ void QWaylandInputDevice::Pointer::pointer_motion(uint32_t time, wl_fixed_t surf
         // so we just set it outside of the window boundaries.
         pos = QPointF(-1, -1);
         global = grab->window()->mapToGlobal(pos.toPoint());
-        grab->handleMouse(mParent, time, pos, global, mButtons, Qt::NoModifier);
-    } else
-        window->handleMouse(mParent, time, mSurfacePos, mGlobalPos, mButtons, Qt::NoModifier);
+        MotionEvent e(time, pos, global, mButtons, Qt::NoModifier);
+        grab->handleMouse(mParent, e);
+    } else {
+        MotionEvent e(time, mSurfacePos, mGlobalPos, mButtons, Qt::NoModifier);
+        window->handleMouse(mParent, e);
+    }
 }
 
 void QWaylandInputDevice::Pointer::pointer_button(uint32_t serial, uint32_t time,
@@ -461,9 +476,12 @@ void QWaylandInputDevice::Pointer::pointer_button(uint32_t serial, uint32_t time
     if (grab && grab != mFocus) {
         QPointF pos = QPointF(-1, -1);
         QPointF global = grab->window()->mapToGlobal(pos.toPoint());
-        grab->handleMouse(mParent, time, pos, global, mButtons, Qt::NoModifier);
-    } else if (window)
-        window->handleMouse(mParent, time, mSurfacePos, mGlobalPos, mButtons, Qt::NoModifier);
+        MotionEvent e(time, pos, global, mButtons, Qt::NoModifier);
+        grab->handleMouse(mParent, e);
+    } else if (window) {
+        MotionEvent e(time, mSurfacePos, mGlobalPos, mButtons, Qt::NoModifier);
+        window->handleMouse(mParent, e);
+    }
 }
 
 void QWaylandInputDevice::Pointer::pointer_axis(uint32_t time, uint32_t axis, int32_t value)
diff --git a/src/client/qwaylandinputdevice_p.h b/src/client/qwaylandinputdevice_p.h
index f1c264545..a5da8bd0f 100644
--- a/src/client/qwaylandinputdevice_p.h
+++ b/src/client/qwaylandinputdevice_p.h
@@ -260,7 +260,29 @@ public:
     QList<QWindowSystemInterface::TouchPoint> mPrevTouchPoints;
 };
 
-
+class QWaylandPointerEvent
+{
+public:
+    enum Type {
+        Enter,
+        Motion
+    };
+    inline QWaylandPointerEvent(Type t, ulong ts, const QPointF &l, const QPointF &g, Qt::MouseButtons b, Qt::KeyboardModifiers m)
+        : type(t)
+        , timestamp(ts)
+        , local(l)
+        , global(g)
+        , buttons(b)
+        , modifiers(m)
+    {}
+
+    Type type;
+    ulong timestamp;
+    QPointF local;
+    QPointF global;
+    Qt::MouseButtons buttons;
+    Qt::KeyboardModifiers modifiers;
+};
 
 QT_END_NAMESPACE
 
diff --git a/src/client/qwaylandwindow.cpp b/src/client/qwaylandwindow.cpp
index fd06972ff..08a123b61 100644
--- a/src/client/qwaylandwindow.cpp
+++ b/src/client/qwaylandwindow.cpp
@@ -603,27 +603,28 @@ QWaylandWindow *QWaylandWindow::transientParent() const
     return 0;
 }
 
-void QWaylandWindow::handleMouse(QWaylandInputDevice *inputDevice, ulong timestamp, const QPointF &local, const QPointF &global, Qt::MouseButtons b, Qt::KeyboardModifiers mods)
+void QWaylandWindow::handleMouse(QWaylandInputDevice *inputDevice, const QWaylandPointerEvent &e)
 {
-    if (b != Qt::NoButton) {
+    if (e.buttons != Qt::NoButton) {
         mMouseSerial = inputDevice->serial();
         mMouseDevice = inputDevice;
     }
 
     if (mWindowDecoration) {
-        handleMouseEventWithDecoration(inputDevice, timestamp,local,global,b,mods);
-        return;
+        handleMouseEventWithDecoration(inputDevice, e);
+    } else {
+        switch (e.type) {
+            case QWaylandPointerEvent::Enter:
+                QWindowSystemInterface::handleEnterEvent(window(), e.local, e.global);
+                break;
+            case QWaylandPointerEvent::Motion:
+                QWindowSystemInterface::handleMouseEvent(window(), e.timestamp, e.local, e.global, e.buttons, e.modifiers);
+                break;
+        }
     }
 
-    QWindowSystemInterface::handleMouseEvent(window(),timestamp,local,global,b,mods);
-}
-
-void QWaylandWindow::handleMouseEnter(QWaylandInputDevice *inputDevice)
-{
-    if (!mWindowDecoration) {
-        QWindowSystemInterface::handleEnterEvent(window());
-    }
-    restoreMouseCursor(inputDevice);
+    if (e.type == QWaylandPointerEvent::Enter)
+        restoreMouseCursor(inputDevice);
 }
 
 void QWaylandWindow::handleMouseLeave(QWaylandInputDevice *inputDevice)
@@ -645,19 +646,22 @@ bool QWaylandWindow::touchDragDecoration(QWaylandInputDevice *inputDevice, const
     return mWindowDecoration->handleTouch(inputDevice, local, global, state, mods);
 }
 
-void QWaylandWindow::handleMouseEventWithDecoration(QWaylandInputDevice *inputDevice, ulong timestamp, const QPointF &local, const QPointF &global, Qt::MouseButtons b, Qt::KeyboardModifiers mods)
+void QWaylandWindow::handleMouseEventWithDecoration(QWaylandInputDevice *inputDevice, const QWaylandPointerEvent &e)
 {
-    if (mWindowDecoration->handleMouse(inputDevice,local,global,b,mods))
+    if (mWindowDecoration->handleMouse(inputDevice, e.local, e.global, e.buttons, e.modifiers)) {
+        if (mMouseEventsInContentArea)
+            QWindowSystemInterface::handleLeaveEvent(window());
         return;
+    }
 
     QMargins marg = frameMargins();
     QRect windowRect(0 + marg.left(),
                      0 + marg.top(),
                      geometry().size().width() - marg.right(),
                      geometry().size().height() - marg.bottom());
-    if (windowRect.contains(local.toPoint()) || mMousePressedInContentArea != Qt::NoButton) {
-        QPointF localTranslated = local;
-        QPointF globalTranslated = global;
+    if (windowRect.contains(e.local.toPoint()) || mMousePressedInContentArea != Qt::NoButton) {
+        QPointF localTranslated = e.local;
+        QPointF globalTranslated = e.global;
         localTranslated.setX(localTranslated.x() - marg.left());
         localTranslated.setY(localTranslated.y() - marg.top());
         globalTranslated.setX(globalTranslated.x() - marg.left());
@@ -666,15 +670,23 @@ void QWaylandWindow::handleMouseEventWithDecoration(QWaylandInputDevice *inputDe
             restoreMouseCursor(inputDevice);
             QWindowSystemInterface::handleEnterEvent(window());
         }
-        QWindowSystemInterface::handleMouseEvent(window(), timestamp, localTranslated, globalTranslated, b, mods);
+
+        switch (e.type) {
+            case QWaylandPointerEvent::Enter:
+                QWindowSystemInterface::handleEnterEvent(window(), localTranslated, globalTranslated);
+                break;
+            case QWaylandPointerEvent::Motion:
+                QWindowSystemInterface::handleMouseEvent(window(), e.timestamp, localTranslated, globalTranslated, e.buttons, e.modifiers);
+                break;
+        }
+
         mMouseEventsInContentArea = true;
-        mMousePressedInContentArea = b;
+        mMousePressedInContentArea = e.buttons;
     } else {
         if (mMouseEventsInContentArea) {
             QWindowSystemInterface::handleLeaveEvent(window());
             mMouseEventsInContentArea = false;
         }
-        mWindowDecoration->handleMouse(inputDevice,local,global,b,mods);
     }
 }
 
diff --git a/src/client/qwaylandwindow_p.h b/src/client/qwaylandwindow_p.h
index 0d982d43e..2650f46d1 100644
--- a/src/client/qwaylandwindow_p.h
+++ b/src/client/qwaylandwindow_p.h
@@ -64,6 +64,7 @@ class QWaylandAbstractDecoration;
 class QWaylandInputDevice;
 class QWaylandScreen;
 class QWaylandShmBackingStore;
+class QWaylandPointerEvent;
 
 class Q_WAYLAND_CLIENT_EXPORT QWaylandWindowConfigure
 {
@@ -151,13 +152,7 @@ public:
 
     QWaylandAbstractDecoration *decoration() const;
 
-    void handleMouse(QWaylandInputDevice *inputDevice,
-                     ulong timestamp,
-                     const QPointF & local,
-                     const QPointF & global,
-                     Qt::MouseButtons b,
-                     Qt::KeyboardModifiers mods);
-    void handleMouseEnter(QWaylandInputDevice *inputDevice);
+    void handleMouse(QWaylandInputDevice *inputDevice, const QWaylandPointerEvent &e);
     void handleMouseLeave(QWaylandInputDevice *inputDevice);
 
     bool touchDragDecoration(QWaylandInputDevice *inputDevice, const QPointF &local, const QPointF &global,
@@ -237,12 +232,7 @@ private:
     bool setWindowStateInternal(Qt::WindowState flags);
     void setGeometry_helper(const QRect &rect);
 
-    void handleMouseEventWithDecoration(QWaylandInputDevice *inputDevice,
-                                        ulong timestamp,
-                                        const QPointF & local,
-                                        const QPointF & global,
-                                        Qt::MouseButtons b,
-                                        Qt::KeyboardModifiers mods);
+    void handleMouseEventWithDecoration(QWaylandInputDevice *inputDevice, const QWaylandPointerEvent &e);
 
     static const wl_callback_listener callbackListener;
     static void frameCallback(void *data, struct wl_callback *wl_callback, uint32_t time);