client: Implement cursor_shape_v1

A new wayland protocol allows clients to specify the cursor being used
rather than load themes and attach buffers.

Short term this has better behavior for scaling.

Long term when this has universal compositor support we can
drop the theme loading code.

Change-Id: I119e1ca44d351e7b13b8ec56f2218d94b7da0705
Reviewed-by: Vlad Zahorodnii <vlad.zahorodnii@kde.org>
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>

1 files changed, 72 insertions, 0 deletions

diff --git a/src/client/qwaylandcursor.cpp b/src/client/qwaylandcursor.cpp
index ec17ed218..83b240ce5 100644
--- a/src/client/qwaylandcursor.cpp
+++ b/src/client/qwaylandcursor.cpp
@@ -1,4 +1,5 @@
 // Copyright (C) 2016 The Qt Company Ltd.
+// Copyright (C) 2023 David Edmundson <davidedmundson@kde.org>
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
 #include "qwaylandcursor_p.h"
@@ -206,6 +207,77 @@ wl_cursor *QWaylandCursorTheme::requestCursor(WaylandCursor shape)
     return waylandCursor;
 }
 
+QWaylandCursorShape::QWaylandCursorShape(::wp_cursor_shape_device_v1 *object)
+    : QtWayland::wp_cursor_shape_device_v1(object)
+{}
+
+QWaylandCursorShape::~QWaylandCursorShape()
+{
+    destroy();
+}
+
+static QtWayland::wp_cursor_shape_device_v1::shape qtCursorShapeToWaylandShape(Qt::CursorShape cursorShape)
+{
+    using QtWayland::wp_cursor_shape_device_v1;
+
+    switch (cursorShape) {
+    case Qt::BlankCursor:
+    case Qt::CustomCursor:
+    case Qt::BitmapCursor:
+        // these should have been handled separately before using the shape protocol
+        Q_ASSERT(false);
+        break;
+    case Qt::ArrowCursor:
+        return wp_cursor_shape_device_v1::shape_default;
+    case Qt::SizeVerCursor:
+        return wp_cursor_shape_device_v1::shape_ns_resize;
+    case Qt::UpArrowCursor:
+        return wp_cursor_shape_device_v1::shape_n_resize;
+    case Qt::SizeHorCursor:
+        return wp_cursor_shape_device_v1::shape_ew_resize;
+    case Qt::CrossCursor:
+        return wp_cursor_shape_device_v1::shape_crosshair;
+    case Qt::SizeBDiagCursor:
+        return wp_cursor_shape_device_v1::shape_nesw_resize;
+    case Qt::IBeamCursor:
+        return wp_cursor_shape_device_v1::shape_text;
+    case Qt::SizeFDiagCursor:
+        return wp_cursor_shape_device_v1::shape_nwse_resize;
+    case Qt::WaitCursor:
+        return wp_cursor_shape_device_v1::shape_progress;
+    case Qt::SizeAllCursor:
+        return wp_cursor_shape_device_v1::shape_all_scroll;
+    case Qt::BusyCursor:
+        return wp_cursor_shape_device_v1::shape_wait;
+    case Qt::SplitVCursor:
+        return wp_cursor_shape_device_v1::shape_row_resize;
+    case Qt::ForbiddenCursor:
+        return wp_cursor_shape_device_v1::shape_not_allowed;
+    case Qt::SplitHCursor:
+        return wp_cursor_shape_device_v1::shape_col_resize;
+    case Qt::PointingHandCursor:
+        return wp_cursor_shape_device_v1::shape_pointer;
+    case Qt::OpenHandCursor:
+        return wp_cursor_shape_device_v1::shape_grab;
+    case Qt::WhatsThisCursor:
+        return wp_cursor_shape_device_v1::shape_help;
+    case Qt::ClosedHandCursor:
+        return wp_cursor_shape_device_v1::shape_grabbing;
+    case Qt::DragMoveCursor:
+    case Qt::DragCopyCursor:
+    case Qt::DragLinkCursor:
+        // drags on wayland are different, the compositor knows
+        // the drag type and can do something custom
+        return wp_cursor_shape_device_v1::shape_grab;
+    }
+    return wp_cursor_shape_device_v1::shape_default;
+}
+
+void QWaylandCursorShape::setShape(uint32_t serial, Qt::CursorShape shape)
+{
+    set_shape(serial, qtCursorShapeToWaylandShape(shape));
+}
+
 QWaylandCursor::QWaylandCursor(QWaylandDisplay *display)
     : mDisplay(display)
 {