Add minimize feature to QWindow using wayland's xdg-shell

The feature is disabled by default,
and can be enabled at runtime
by exporting QT_WAYLAND_USE_XDG_SHELL env variable.

This patch relies on presence of protocol file
which has been imported from weston-1.4.0 sources,
until the xdg-shell is merge into wayland itself.

Because xdg-shell is experimental,
code fallback to WaylandShell if no XdgShell
but keep in mind those shells are exclusive.

Since xdg-shell and wayland-shell share most of the API,
some factorization is done by an (empty) abstraction class
to keep the code more readable.

Despite xdg-shell introduces new popups concept,
they're not used on this change for maitainance purpose.

Notes:

* This change depends on presence of xdg-shell protocol file.

* You can check a demo video
  (qt-tizen-cinematic-experience-20140430-rzr)
  of the test case at :
  https://www.youtube.com/watch?v=pY_XXvKc_0E#

* Use Super+Tab to show window again if hidden

Task-number: QTBUG-38633/part/2of2
Change-Id: I2d7ed85bea1847d82439fdfc893a3dbb2581c14a
Reviewed-by: Giulio Camuffo <giulio.camuffo@jollamobile.com>

1 files changed, 173 insertions, 0 deletions

diff --git a/src/client/qwaylandxdgsurface.cpp b/src/client/qwaylandxdgsurface.cpp
new file mode 100644
index 000000000..1b8affacf
--- /dev/null
+++ b/src/client/qwaylandxdgsurface.cpp
@@ -0,0 +1,173 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the config.tests of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qwaylandxdgsurface_p.h"
+
+#include "qwaylanddisplay_p.h"
+#include "qwaylandwindow_p.h"
+#include "qwaylandinputdevice_p.h"
+#include "qwaylanddecoration_p.h"
+#include "qwaylandscreen_p.h"
+
+#include <QtCore/QDebug>
+
+QT_BEGIN_NAMESPACE
+
+QWaylandXdgSurface::QWaylandXdgSurface(struct ::xdg_surface *xdg_surface, QWaylandWindow *window)
+    : QtWayland::xdg_surface(xdg_surface)
+    , m_window(window)
+    , m_maximized(false)
+    , m_minimized(false)
+    , m_fullscreen(false)
+{
+}
+
+QWaylandXdgSurface::~QWaylandXdgSurface()
+{
+    xdg_surface_destroy(object());
+}
+
+void QWaylandXdgSurface::resize(QWaylandInputDevice *inputDevice, enum wl_shell_surface_resize edges)
+{
+    // May need some conversion if types get incompatibles, ATM they're identical
+    enum resize_edge const * const arg = reinterpret_cast<enum resize_edge const * const>(&edges);
+    resize(inputDevice, *arg);
+}
+
+void QWaylandXdgSurface::resize(QWaylandInputDevice *inputDevice, enum resize_edge edges)
+{
+    resize(inputDevice->wl_seat(),
+           inputDevice->serial(),
+           edges);
+}
+
+void QWaylandXdgSurface::move(QWaylandInputDevice *inputDevice)
+{
+    move(inputDevice->wl_seat(),
+         inputDevice->serial());
+}
+
+void QWaylandXdgSurface::setMaximized()
+{
+    m_maximized = true;
+    m_size = m_window->window()->geometry().size();
+    set_maximized();
+}
+
+void QWaylandXdgSurface::setFullscreen()
+{
+    m_fullscreen = true;
+    m_size = m_window->window()->geometry().size();
+    set_fullscreen();
+}
+
+void QWaylandXdgSurface::setNormal()
+{
+    if (m_fullscreen || m_maximized  || m_minimized) {
+        if (m_maximized) { unset_maximized(); }
+        if (m_fullscreen) { unset_fullscreen(); }
+
+        m_fullscreen = m_maximized = m_minimized = false;
+        setTopLevel();
+        QMargins m = m_window->frameMargins();
+        m_window->configure(0, m_size.width() + m.left() + m.right(), m_size.height() + m.top() + m.bottom());
+    }
+}
+
+void QWaylandXdgSurface::setMinimized()
+{
+    m_minimized = true;
+    m_size = m_window->window()->geometry().size();
+    set_minimized();
+}
+
+void QWaylandXdgSurface::setTopLevel()
+{
+    // There's no xdg_shell_surface API for this, ignoring
+}
+
+void QWaylandXdgSurface::updateTransientParent(QWindow *parent)
+{
+    QWaylandWindow *parent_wayland_window = static_cast<QWaylandWindow *>(parent->handle());
+    if (!parent_wayland_window)
+        return;
+
+    // set_transient expects a position relative to the parent
+    QPoint transientPos = m_window->geometry().topLeft(); // this is absolute
+    QWindow *parentWin = m_window->window()->transientParent();
+    transientPos -= parentWin->geometry().topLeft();
+    if (parent_wayland_window->decoration()) {
+        transientPos.setX(transientPos.x() + parent_wayland_window->decoration()->margins().left());
+        transientPos.setY(transientPos.y() + parent_wayland_window->decoration()->margins().top());
+    }
+
+    uint32_t flags = 0;
+    Qt::WindowFlags wf = m_window->window()->flags();
+    if (wf.testFlag(Qt::ToolTip)
+            || wf.testFlag(Qt::WindowTransparentForInput))
+        flags |= XDG_SURFACE_SET_TRANSIENT_FOR;
+
+    set_transient_for(parent_wayland_window->object());
+}
+
+void QWaylandXdgSurface::setTitle(const QString & title)
+{
+    return QtWayland::xdg_surface::set_title(title);
+}
+
+void QWaylandXdgSurface::setAppId(const QString & appId)
+{
+    return QtWayland::xdg_surface::set_app_id(appId);
+}
+
+void QWaylandXdgSurface::xdg_surface_ping(uint32_t serial)
+{
+    pong(serial);
+}
+
+void QWaylandXdgSurface::xdg_surface_configure(uint32_t edges, int32_t width,
+                                               int32_t height)
+{
+    m_window->configure(edges, width, height);
+}
+
+
+QT_END_NAMESPACE