/
qxcbwindow.cpp
2828 lines (2432 loc) · 104 KB
/
qxcbwindow.cpp
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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the plugins 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 The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/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 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qxcbwindow.h"
#include <QtDebug>
#include <QMetaEnum>
#include <QScreen>
#include <QtGui/QIcon>
#include <QtGui/QRegion>
#include <QtGui/private/qhighdpiscaling_p.h>
#include "qxcbintegration.h"
#include "qxcbconnection.h"
#include "qxcbscreen.h"
#if QT_CONFIG(draganddrop)
#include "qxcbdrag.h"
#endif
#include "qxcbkeyboard.h"
#include "qxcbimage.h"
#include "qxcbwmsupport.h"
#include "qxcbimage.h"
#include "qxcbnativeinterface.h"
#include "qxcbsystemtraytracker.h"
#include <qpa/qplatformintegration.h>
#include <qpa/qplatformcursor.h>
#include <algorithm>
// FIXME This workaround can be removed for xcb-icccm > 3.8
#define class class_name
#include <xcb/xcb_icccm.h>
#undef class
#include <xcb/xfixes.h>
#include <xcb/shape.h>
#if QT_CONFIG(xcb_xinput)
#include <xcb/xinput.h>
#endif
// xcb-icccm 3.8 support
#ifdef XCB_ICCCM_NUM_WM_SIZE_HINTS_ELEMENTS
#define xcb_get_wm_hints_reply xcb_icccm_get_wm_hints_reply
#define xcb_get_wm_hints xcb_icccm_get_wm_hints
#define xcb_get_wm_hints_unchecked xcb_icccm_get_wm_hints_unchecked
#define xcb_set_wm_hints xcb_icccm_set_wm_hints
#define xcb_set_wm_normal_hints xcb_icccm_set_wm_normal_hints
#define xcb_size_hints_set_base_size xcb_icccm_size_hints_set_base_size
#define xcb_size_hints_set_max_size xcb_icccm_size_hints_set_max_size
#define xcb_size_hints_set_min_size xcb_icccm_size_hints_set_min_size
#define xcb_size_hints_set_position xcb_icccm_size_hints_set_position
#define xcb_size_hints_set_resize_inc xcb_icccm_size_hints_set_resize_inc
#define xcb_size_hints_set_size xcb_icccm_size_hints_set_size
#define xcb_size_hints_set_win_gravity xcb_icccm_size_hints_set_win_gravity
#define xcb_wm_hints_set_iconic xcb_icccm_wm_hints_set_iconic
#define xcb_wm_hints_set_normal xcb_icccm_wm_hints_set_normal
#define xcb_wm_hints_set_input xcb_icccm_wm_hints_set_input
#define xcb_wm_hints_t xcb_icccm_wm_hints_t
#define XCB_WM_STATE_ICONIC XCB_ICCCM_WM_STATE_ICONIC
#define XCB_WM_STATE_WITHDRAWN XCB_ICCCM_WM_STATE_WITHDRAWN
#endif
#include <private/qguiapplication_p.h>
#include <private/qwindow_p.h>
#include <qpa/qplatformbackingstore.h>
#include <qpa/qwindowsysteminterface.h>
#include <QTextCodec>
#include <stdio.h>
#if QT_CONFIG(xcb_xlib)
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#endif
#define XCOORD_MAX 16383
enum {
defaultWindowWidth = 160,
defaultWindowHeight = 160
};
//#ifdef NET_WM_STATE_DEBUG
QT_BEGIN_NAMESPACE
Q_DECLARE_TYPEINFO(xcb_rectangle_t, Q_PRIMITIVE_TYPE);
#undef FocusIn
enum QX11EmbedFocusInDetail {
XEMBED_FOCUS_CURRENT = 0,
XEMBED_FOCUS_FIRST = 1,
XEMBED_FOCUS_LAST = 2
};
enum QX11EmbedInfoFlags {
XEMBED_MAPPED = (1 << 0),
};
enum QX11EmbedMessageType {
XEMBED_EMBEDDED_NOTIFY = 0,
XEMBED_WINDOW_ACTIVATE = 1,
XEMBED_WINDOW_DEACTIVATE = 2,
XEMBED_REQUEST_FOCUS = 3,
XEMBED_FOCUS_IN = 4,
XEMBED_FOCUS_OUT = 5,
XEMBED_FOCUS_NEXT = 6,
XEMBED_FOCUS_PREV = 7,
XEMBED_MODALITY_ON = 10,
XEMBED_MODALITY_OFF = 11,
XEMBED_REGISTER_ACCELERATOR = 12,
XEMBED_UNREGISTER_ACCELERATOR = 13,
XEMBED_ACTIVATE_ACCELERATOR = 14
};
const quint32 XEMBED_VERSION = 0;
QXcbScreen *QXcbWindow::parentScreen()
{
return parent() ? static_cast<QXcbWindow*>(parent())->parentScreen() : xcbScreen();
}
//QPlatformWindow::screenForGeometry version that uses deviceIndependentGeometry
QXcbScreen *QXcbWindow::initialScreen() const
{
QWindowPrivate *windowPrivate = qt_window_private(window());
QScreen *screen = windowPrivate->screenForGeometry(window()->geometry());
return static_cast<QXcbScreen*>(screen->handle());
}
// Returns \c true if we should set WM_TRANSIENT_FOR on \a w
static inline bool isTransient(const QWindow *w)
{
return w->type() == Qt::Dialog
|| w->type() == Qt::Sheet
|| w->type() == Qt::Tool
|| w->type() == Qt::SplashScreen
|| w->type() == Qt::ToolTip
|| w->type() == Qt::Drawer
|| w->type() == Qt::Popup;
}
void QXcbWindow::setImageFormatForVisual(const xcb_visualtype_t *visual)
{
if (qt_xcb_imageFormatForVisual(connection(), m_depth, visual, &m_imageFormat, &m_imageRgbSwap))
return;
switch (m_depth) {
case 32:
case 24:
qWarning("Using RGB32 fallback, if this works your X11 server is reporting a bad screen format.");
m_imageFormat = QImage::Format_RGB32;
break;
case 16:
qWarning("Using RGB16 fallback, if this works your X11 server is reporting a bad screen format.");
m_imageFormat = QImage::Format_RGB16;
default:
break;
}
}
#if QT_CONFIG(xcb_xlib)
static inline XTextProperty* qstringToXTP(Display *dpy, const QString& s)
{
#include <X11/Xatom.h>
static XTextProperty tp = { 0, 0, 0, 0 };
static bool free_prop = true; // we can't free tp.value in case it references
// the data of the static QByteArray below.
if (tp.value) {
if (free_prop)
XFree(tp.value);
tp.value = 0;
free_prop = true;
}
#if QT_CONFIG(textcodec)
static const QTextCodec* mapper = QTextCodec::codecForLocale();
int errCode = 0;
if (mapper) {
QByteArray mapped = mapper->fromUnicode(s);
char* tl[2];
tl[0] = mapped.data();
tl[1] = 0;
errCode = XmbTextListToTextProperty(dpy, tl, 1, XStdICCTextStyle, &tp);
if (errCode < 0)
qCDebug(lcQpaXcb, "XmbTextListToTextProperty result code %d", errCode);
}
if (!mapper || errCode < 0) {
mapper = QTextCodec::codecForName("latin1");
if (!mapper || !mapper->canEncode(s))
return nullptr;
#endif
static QByteArray qcs;
qcs = s.toLatin1();
tp.value = (uchar*)qcs.data();
tp.encoding = XA_STRING;
tp.format = 8;
tp.nitems = qcs.length();
free_prop = false;
#if QT_CONFIG(textcodec)
}
#else
Q_UNUSED(dpy);
#endif
return &tp;
}
#endif // QT_CONFIG(xcb_xlib)
// TODO move this into a utility function in QWindow or QGuiApplication
static QWindow *childWindowAt(QWindow *win, const QPoint &p)
{
for (QObject *obj : win->children()) {
if (obj->isWindowType()) {
QWindow *childWin = static_cast<QWindow *>(obj);
if (childWin->isVisible()) {
if (QWindow *recurse = childWindowAt(childWin, p))
return recurse;
}
}
}
if (!win->isTopLevel()
&& !(win->flags() & Qt::WindowTransparentForInput)
&& win->geometry().contains(win->parent()->mapFromGlobal(p))) {
return win;
}
return nullptr;
}
static const char *wm_window_type_property_id = "_q_xcb_wm_window_type";
static const char *wm_window_role_property_id = "_q_xcb_wm_window_role";
QXcbWindow::QXcbWindow(QWindow *window)
: QPlatformWindow(window)
{
setConnection(xcbScreen()->connection());
}
#ifdef Q_COMPILER_CLASS_ENUM
enum : quint32 {
#else
enum {
#endif
baseEventMask
= XCB_EVENT_MASK_EXPOSURE | XCB_EVENT_MASK_STRUCTURE_NOTIFY
| XCB_EVENT_MASK_PROPERTY_CHANGE | XCB_EVENT_MASK_FOCUS_CHANGE,
defaultEventMask = baseEventMask
| XCB_EVENT_MASK_KEY_PRESS | XCB_EVENT_MASK_KEY_RELEASE
| XCB_EVENT_MASK_BUTTON_PRESS | XCB_EVENT_MASK_BUTTON_RELEASE
| XCB_EVENT_MASK_BUTTON_MOTION | XCB_EVENT_MASK_ENTER_WINDOW | XCB_EVENT_MASK_LEAVE_WINDOW
| XCB_EVENT_MASK_POINTER_MOTION,
transparentForInputEventMask = baseEventMask
| XCB_EVENT_MASK_VISIBILITY_CHANGE | XCB_EVENT_MASK_RESIZE_REDIRECT
| XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT
| XCB_EVENT_MASK_COLOR_MAP_CHANGE | XCB_EVENT_MASK_OWNER_GRAB_BUTTON
};
void QXcbWindow::create()
{
destroy();
m_windowState = Qt::WindowNoState;
Qt::WindowType type = window()->type();
QXcbScreen *currentScreen = xcbScreen();
QXcbScreen *platformScreen = parent() ? parentScreen() : initialScreen();
QRect rect = QHighDpi::toNativePixels(window()->geometry(), platformScreen);
if (type == Qt::Desktop) {
m_window = platformScreen->root();
m_depth = platformScreen->screen()->root_depth;
m_visualId = platformScreen->screen()->root_visual;
const xcb_visualtype_t *visual = 0;
if (connection()->hasDefaultVisualId()) {
visual = platformScreen->visualForId(connection()->defaultVisualId());
if (visual)
m_visualId = connection()->defaultVisualId();
if (!visual)
qWarning("Could not use default visual id. Falling back to root_visual for screen.");
}
if (!visual)
visual = platformScreen->visualForId(m_visualId);
setImageFormatForVisual(visual);
connection()->addWindowEventListener(m_window, this);
return;
}
QPlatformWindow::setGeometry(rect);
if (platformScreen != currentScreen)
QWindowSystemInterface::handleWindowScreenChanged(window(), platformScreen->QPlatformScreen::screen());
const QSize minimumSize = windowMinimumSize();
if (rect.width() > 0 || rect.height() > 0) {
rect.setWidth(qBound(1, rect.width(), XCOORD_MAX));
rect.setHeight(qBound(1, rect.height(), XCOORD_MAX));
} else if (minimumSize.width() > 0 || minimumSize.height() > 0) {
rect.setSize(minimumSize);
} else {
rect.setWidth(QHighDpi::toNativePixels(int(defaultWindowWidth), platformScreen->QPlatformScreen::screen()));
rect.setHeight(QHighDpi::toNativePixels(int(defaultWindowHeight), platformScreen->QPlatformScreen::screen()));
}
xcb_window_t xcb_parent_id = platformScreen->root();
if (parent()) {
xcb_parent_id = static_cast<QXcbWindow *>(parent())->xcb_window();
m_embedded = parent()->isForeignWindow();
QSurfaceFormat parentFormat = parent()->window()->requestedFormat();
if (window()->surfaceType() != QSurface::OpenGLSurface && parentFormat.hasAlpha()) {
window()->setFormat(parentFormat);
}
}
resolveFormat(platformScreen->surfaceFormatFor(window()->requestedFormat()));
const xcb_visualtype_t *visual = nullptr;
if (connection()->hasDefaultVisualId()) {
visual = platformScreen->visualForId(connection()->defaultVisualId());
if (!visual)
qWarning() << "Failed to use requested visual id.";
}
if (parent()) {
// When using a Vulkan QWindow via QWidget::createWindowContainer() we
// must make sure the visuals are compatible. Now, the parent will be
// of RasterGLSurface which typically chooses a GLX/EGL compatible
// visual which may not be what the Vulkan window would choose.
// Therefore, take the parent's visual.
if (window()->surfaceType() == QSurface::VulkanSurface
&& parent()->window()->surfaceType() != QSurface::VulkanSurface)
{
visual = platformScreen->visualForId(static_cast<QXcbWindow *>(parent())->visualId());
}
}
if (!visual)
visual = createVisual();
if (!visual) {
qWarning() << "Falling back to using screens root_visual.";
visual = platformScreen->visualForId(platformScreen->screen()->root_visual);
}
Q_ASSERT(visual);
m_visualId = visual->visual_id;
m_depth = platformScreen->depthOfVisual(m_visualId);
setImageFormatForVisual(visual);
quint32 mask = XCB_CW_BACK_PIXMAP
| XCB_CW_BORDER_PIXEL
| XCB_CW_BIT_GRAVITY
| XCB_CW_OVERRIDE_REDIRECT
| XCB_CW_SAVE_UNDER
| XCB_CW_EVENT_MASK;
static const bool haveOpenGL = QGuiApplicationPrivate::platformIntegration()->hasCapability(QPlatformIntegration::OpenGL);
if ((window()->supportsOpenGL() && haveOpenGL) || m_format.hasAlpha()) {
m_cmap = xcb_generate_id(xcb_connection());
xcb_create_colormap(xcb_connection(),
XCB_COLORMAP_ALLOC_NONE,
m_cmap,
xcb_parent_id,
m_visualId);
mask |= XCB_CW_COLORMAP;
}
quint32 values[] = {
XCB_BACK_PIXMAP_NONE,
platformScreen->screen()->black_pixel,
XCB_GRAVITY_NORTH_WEST,
type == Qt::Popup || type == Qt::ToolTip || (window()->flags() & Qt::BypassWindowManagerHint),
type == Qt::Popup || type == Qt::Tool || type == Qt::SplashScreen || type == Qt::ToolTip || type == Qt::Drawer,
defaultEventMask,
m_cmap
};
m_window = xcb_generate_id(xcb_connection());
xcb_create_window(xcb_connection(),
m_depth,
m_window, // window id
xcb_parent_id, // parent window id
rect.x(),
rect.y(),
rect.width(),
rect.height(),
0, // border width
XCB_WINDOW_CLASS_INPUT_OUTPUT, // window class
m_visualId, // visual
mask,
values);
connection()->addWindowEventListener(m_window, this);
xcb_change_window_attributes(xcb_connection(), m_window, mask, values);
propagateSizeHints();
xcb_atom_t properties[5];
int propertyCount = 0;
properties[propertyCount++] = atom(QXcbAtom::WM_DELETE_WINDOW);
properties[propertyCount++] = atom(QXcbAtom::WM_TAKE_FOCUS);
properties[propertyCount++] = atom(QXcbAtom::_NET_WM_PING);
if (connection()->hasXSync())
properties[propertyCount++] = atom(QXcbAtom::_NET_WM_SYNC_REQUEST);
if (window()->flags() & Qt::WindowContextHelpButtonHint)
properties[propertyCount++] = atom(QXcbAtom::_NET_WM_CONTEXT_HELP);
xcb_change_property(xcb_connection(),
XCB_PROP_MODE_REPLACE,
m_window,
atom(QXcbAtom::WM_PROTOCOLS),
XCB_ATOM_ATOM,
32,
propertyCount,
properties);
m_syncValue.hi = 0;
m_syncValue.lo = 0;
const QByteArray wmClass = QXcbIntegration::instance()->wmClass();
if (!wmClass.isEmpty()) {
xcb_change_property(xcb_connection(), XCB_PROP_MODE_REPLACE,
m_window, atom(QXcbAtom::WM_CLASS),
XCB_ATOM_STRING, 8, wmClass.size(), wmClass.constData());
}
if (connection()->hasXSync()) {
m_syncCounter = xcb_generate_id(xcb_connection());
xcb_sync_create_counter(xcb_connection(), m_syncCounter, m_syncValue);
xcb_change_property(xcb_connection(),
XCB_PROP_MODE_REPLACE,
m_window,
atom(QXcbAtom::_NET_WM_SYNC_REQUEST_COUNTER),
XCB_ATOM_CARDINAL,
32,
1,
&m_syncCounter);
}
// set the PID to let the WM kill the application if unresponsive
quint32 pid = getpid();
xcb_change_property(xcb_connection(), XCB_PROP_MODE_REPLACE, m_window,
atom(QXcbAtom::_NET_WM_PID), XCB_ATOM_CARDINAL, 32,
1, &pid);
xcb_wm_hints_t hints;
memset(&hints, 0, sizeof(hints));
xcb_wm_hints_set_normal(&hints);
xcb_wm_hints_set_input(&hints, !(window()->flags() & Qt::WindowDoesNotAcceptFocus));
xcb_set_wm_hints(xcb_connection(), m_window, &hints);
xcb_window_t leader = connection()->clientLeader();
xcb_change_property(xcb_connection(), XCB_PROP_MODE_REPLACE, m_window,
atom(QXcbAtom::WM_CLIENT_LEADER), XCB_ATOM_WINDOW, 32,
1, &leader);
/* Add XEMBED info; this operation doesn't initiate the embedding. */
quint32 data[] = { XEMBED_VERSION, XEMBED_MAPPED };
xcb_change_property(xcb_connection(), XCB_PROP_MODE_REPLACE, m_window,
atom(QXcbAtom::_XEMBED_INFO),
atom(QXcbAtom::_XEMBED_INFO),
32, 2, (void *)data);
#if QT_CONFIG(xcb_xinput)
if (connection()->hasXInput2()) {
if (connection()->xi2MouseEventsDisabled())
connection()->xi2SelectDeviceEventsCompatibility(m_window);
else
connection()->xi2SelectDeviceEvents(m_window);
}
#endif
setWindowState(window()->windowStates());
setWindowFlags(window()->flags());
setWindowTitle(window()->title());
if (window()->flags() & Qt::WindowTransparentForInput)
setTransparentForMouseEvents(true);
#if QT_CONFIG(xcb_xlib)
// force sync to read outstanding requests - see QTBUG-29106
XSync(static_cast<Display*>(platformScreen->connection()->xlib_display()), false);
#endif
#if QT_CONFIG(draganddrop)
connection()->drag()->dndEnable(this, true);
#endif
const qreal opacity = qt_window_private(window())->opacity;
if (!qFuzzyCompare(opacity, qreal(1.0)))
setOpacity(opacity);
setMask(QHighDpi::toNativeLocalRegion(window()->mask(), window()));
if (window()->isTopLevel())
setWindowIcon(window()->icon());
if (window()->dynamicPropertyNames().contains(wm_window_role_property_id)) {
QByteArray wmWindowRole = window()->property(wm_window_role_property_id).toByteArray();
setWmWindowRole(wmWindowRole);
}
}
QXcbWindow::~QXcbWindow()
{
destroy();
}
QXcbForeignWindow::~QXcbForeignWindow()
{
// Clear window so that destroy() does not affect it
m_window = 0;
if (connection()->mouseGrabber() == this)
connection()->setMouseGrabber(nullptr);
if (connection()->mousePressWindow() == this)
connection()->setMousePressWindow(nullptr);
}
void QXcbWindow::destroy()
{
if (connection()->focusWindow() == this)
doFocusOut();
if (connection()->mouseGrabber() == this)
connection()->setMouseGrabber(nullptr);
if (m_syncCounter && connection()->hasXSync())
xcb_sync_destroy_counter(xcb_connection(), m_syncCounter);
if (m_window) {
if (m_netWmUserTimeWindow) {
xcb_delete_property(xcb_connection(), m_window, atom(QXcbAtom::_NET_WM_USER_TIME_WINDOW));
// Some window managers, like metacity, do XSelectInput on the _NET_WM_USER_TIME_WINDOW window,
// without trapping BadWindow (which crashes when the user time window is destroyed).
connection()->sync();
xcb_destroy_window(xcb_connection(), m_netWmUserTimeWindow);
m_netWmUserTimeWindow = XCB_NONE;
}
connection()->removeWindowEventListener(m_window);
xcb_destroy_window(xcb_connection(), m_window);
m_window = 0;
}
if (m_cmap) {
xcb_free_colormap(xcb_connection(), m_cmap);
}
m_mapped = false;
if (m_pendingSyncRequest)
m_pendingSyncRequest->invalidate();
}
void QXcbWindow::setGeometry(const QRect &rect)
{
QPlatformWindow::setGeometry(rect);
propagateSizeHints();
QXcbScreen *currentScreen = xcbScreen();
QXcbScreen *newScreen = parent() ? parentScreen() : static_cast<QXcbScreen*>(screenForGeometry(rect));
if (!newScreen)
newScreen = xcbScreen();
if (newScreen != currentScreen)
QWindowSystemInterface::handleWindowScreenChanged(window(), newScreen->QPlatformScreen::screen());
if (qt_window_private(window())->positionAutomatic) {
const quint32 mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
const qint32 values[] = {
qBound<qint32>(1, rect.width(), XCOORD_MAX),
qBound<qint32>(1, rect.height(), XCOORD_MAX),
};
xcb_configure_window(xcb_connection(), m_window, mask, reinterpret_cast<const quint32*>(values));
} else {
const quint32 mask = XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y | XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
const qint32 values[] = {
qBound<qint32>(-XCOORD_MAX, rect.x(), XCOORD_MAX),
qBound<qint32>(-XCOORD_MAX, rect.y(), XCOORD_MAX),
qBound<qint32>(1, rect.width(), XCOORD_MAX),
qBound<qint32>(1, rect.height(), XCOORD_MAX),
};
xcb_configure_window(xcb_connection(), m_window, mask, reinterpret_cast<const quint32*>(values));
if (window()->parent() && !window()->transientParent()) {
// Wait for server reply for parented windows to ensure that a few window
// moves will come as a one event. This is important when native widget is
// moved a few times in X and Y directions causing native scroll. Widget
// must get single event to not trigger unwanted widget position changes
// and then expose events causing backingstore flushes with incorrect
// offset causing image crruption.
connection()->sync();
}
}
xcb_flush(xcb_connection());
}
QMargins QXcbWindow::frameMargins() const
{
if (m_dirtyFrameMargins) {
if (connection()->wmSupport()->isSupportedByWM(atom(QXcbAtom::_NET_FRAME_EXTENTS))) {
auto reply = Q_XCB_REPLY(xcb_get_property, xcb_connection(), false, m_window,
atom(QXcbAtom::_NET_FRAME_EXTENTS), XCB_ATOM_CARDINAL, 0, 4);
if (reply && reply->type == XCB_ATOM_CARDINAL && reply->format == 32 && reply->value_len == 4) {
quint32 *data = (quint32 *)xcb_get_property_value(reply.get());
// _NET_FRAME_EXTENTS format is left, right, top, bottom
m_frameMargins = QMargins(data[0], data[2], data[1], data[3]);
m_dirtyFrameMargins = false;
return m_frameMargins;
}
}
// _NET_FRAME_EXTENTS property is not available, so
// walk up the window tree to get the frame parent
xcb_window_t window = m_window;
xcb_window_t parent = m_window;
bool foundRoot = false;
const QVector<xcb_window_t> &virtualRoots =
connection()->wmSupport()->virtualRoots();
while (!foundRoot) {
auto reply = Q_XCB_REPLY_UNCHECKED(xcb_query_tree, xcb_connection(), parent);
if (reply) {
if (reply->root == reply->parent || virtualRoots.indexOf(reply->parent) != -1 || reply->parent == XCB_WINDOW_NONE) {
foundRoot = true;
} else {
window = parent;
parent = reply->parent;
}
} else {
m_dirtyFrameMargins = false;
m_frameMargins = QMargins();
return m_frameMargins;
}
}
QPoint offset;
auto reply = Q_XCB_REPLY(xcb_translate_coordinates, xcb_connection(), window, parent, 0, 0);
if (reply) {
offset = QPoint(reply->dst_x, reply->dst_y);
}
auto geom = Q_XCB_REPLY(xcb_get_geometry, xcb_connection(), parent);
if (geom) {
// --
// add the border_width for the window managers frame... some window managers
// do not use a border_width of zero for their frames, and if we the left and
// top strut, we ensure that pos() is absolutely correct. frameGeometry()
// will still be incorrect though... perhaps i should have foffset as well, to
// indicate the frame offset (equal to the border_width on X).
// - Brad
// -- copied from qwidget_x11.cpp
int left = offset.x() + geom->border_width;
int top = offset.y() + geom->border_width;
int right = geom->width + geom->border_width - geometry().width() - offset.x();
int bottom = geom->height + geom->border_width - geometry().height() - offset.y();
m_frameMargins = QMargins(left, top, right, bottom);
}
m_dirtyFrameMargins = false;
}
return m_frameMargins;
}
void QXcbWindow::setVisible(bool visible)
{
if (visible)
show();
else
hide();
}
static inline bool testShowWithoutActivating(const QWindow *window)
{
// QWidget-attribute Qt::WA_ShowWithoutActivating.
const QVariant showWithoutActivating = window->property("_q_showWithoutActivating");
return showWithoutActivating.isValid() && showWithoutActivating.toBool();
}
void QXcbWindow::show()
{
if (window()->isTopLevel()) {
xcb_get_property_cookie_t cookie = xcb_get_wm_hints_unchecked(xcb_connection(), m_window);
xcb_wm_hints_t hints;
xcb_get_wm_hints_reply(xcb_connection(), cookie, &hints, NULL);
if (window()->windowStates() & Qt::WindowMinimized)
xcb_wm_hints_set_iconic(&hints);
else
xcb_wm_hints_set_normal(&hints);
xcb_wm_hints_set_input(&hints, !(window()->flags() & Qt::WindowDoesNotAcceptFocus));
xcb_set_wm_hints(xcb_connection(), m_window, &hints);
// update WM_NORMAL_HINTS
propagateSizeHints();
// update WM_TRANSIENT_FOR
xcb_window_t transientXcbParent = 0;
if (isTransient(window())) {
const QWindow *tp = window()->transientParent();
if (tp && tp->handle())
transientXcbParent = static_cast<const QXcbWindow *>(tp->handle())->winId();
// Default to client leader if there is no transient parent, else modal dialogs can
// be hidden by their parents.
if (!transientXcbParent)
transientXcbParent = connection()->clientLeader();
if (transientXcbParent) { // ICCCM 4.1.2.6
xcb_change_property(xcb_connection(), XCB_PROP_MODE_REPLACE, m_window,
XCB_ATOM_WM_TRANSIENT_FOR, XCB_ATOM_WINDOW, 32,
1, &transientXcbParent);
}
}
if (!transientXcbParent)
xcb_delete_property(xcb_connection(), m_window, XCB_ATOM_WM_TRANSIENT_FOR);
// update _MOTIF_WM_HINTS
updateMotifWmHintsBeforeMap();
// update _NET_WM_STATE
updateNetWmStateBeforeMap();
}
if (testShowWithoutActivating(window()))
updateNetWmUserTime(0);
else if (connection()->time() != XCB_TIME_CURRENT_TIME)
updateNetWmUserTime(connection()->time());
if (window()->objectName() == QLatin1String("QSystemTrayIconSysWindow"))
return; // defer showing until XEMBED_EMBEDDED_NOTIFY
xcb_map_window(xcb_connection(), m_window);
if (QGuiApplication::modalWindow() == window())
requestActivateWindow();
xcbScreen()->windowShown(this);
connection()->sync();
}
void QXcbWindow::hide()
{
xcb_unmap_window(xcb_connection(), m_window);
// send synthetic UnmapNotify event according to icccm 4.1.4
q_padded_xcb_event<xcb_unmap_notify_event_t> event = {};
event.response_type = XCB_UNMAP_NOTIFY;
event.event = xcbScreen()->root();
event.window = m_window;
event.from_configure = false;
xcb_send_event(xcb_connection(), false, xcbScreen()->root(),
XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY | XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT, (const char *)&event);
xcb_flush(xcb_connection());
if (connection()->mouseGrabber() == this)
connection()->setMouseGrabber(nullptr);
if (QPlatformWindow *w = connection()->mousePressWindow()) {
// Unset mousePressWindow when it (or one of its parents) is unmapped
while (w) {
if (w == this) {
connection()->setMousePressWindow(nullptr);
break;
}
w = w->parent();
}
}
m_mapped = false;
// Hiding a modal window doesn't send an enter event to its transient parent when the
// mouse is already over the parent window, so the enter event must be emulated.
if (window()->isModal()) {
// Get the cursor position at modal window screen
const QPoint nativePos = xcbScreen()->cursor()->pos();
const QPoint cursorPos = QHighDpi::fromNativePixels(nativePos, xcbScreen()->screenForPosition(nativePos)->screen());
// Find the top level window at cursor position.
// Don't use QGuiApplication::topLevelAt(): search only the virtual siblings of this window's screen
QWindow *enterWindow = nullptr;
const auto screens = xcbScreen()->virtualSiblings();
for (QPlatformScreen *screen : screens) {
if (screen->geometry().contains(cursorPos)) {
const QPoint devicePosition = QHighDpi::toNativePixels(cursorPos, screen->screen());
enterWindow = screen->topLevelAt(devicePosition);
break;
}
}
if (enterWindow && enterWindow != window()) {
// Find the child window at cursor position, otherwise use the top level window
if (QWindow *childWindow = childWindowAt(enterWindow, cursorPos))
enterWindow = childWindow;
const QPoint localPos = enterWindow->mapFromGlobal(cursorPos);
QWindowSystemInterface::handleEnterEvent(enterWindow,
localPos * QHighDpiScaling::factor(enterWindow),
nativePos);
}
}
}
bool QXcbWindow::relayFocusToModalWindow() const
{
QWindow *w = static_cast<QWindowPrivate *>(QObjectPrivate::get(window()))->eventReceiver();
// get top-level window
while (w && w->parent())
w = w->parent();
QWindow *modalWindow = 0;
const bool blocked = QGuiApplicationPrivate::instance()->isWindowBlocked(w, &modalWindow);
if (blocked && modalWindow != w) {
modalWindow->requestActivate();
connection()->flush();
return true;
}
return false;
}
void QXcbWindow::doFocusIn()
{
if (relayFocusToModalWindow())
return;
QWindow *w = static_cast<QWindowPrivate *>(QObjectPrivate::get(window()))->eventReceiver();
connection()->setFocusWindow(w);
QWindowSystemInterface::handleWindowActivated(w, Qt::ActiveWindowFocusReason);
}
static bool focusInPeeker(QXcbConnection *connection, xcb_generic_event_t *event)
{
if (!event) {
// FocusIn event is not in the queue, proceed with FocusOut normally.
QWindowSystemInterface::handleWindowActivated(nullptr, Qt::ActiveWindowFocusReason);
return true;
}
uint response_type = event->response_type & ~0x80;
if (response_type == XCB_FOCUS_IN) {
// Ignore focus events that are being sent only because the pointer is over
// our window, even if the input focus is in a different window.
xcb_focus_in_event_t *e = (xcb_focus_in_event_t *) event;
if (e->detail != XCB_NOTIFY_DETAIL_POINTER)
return true;
}
/* We are also interested in XEMBED_FOCUS_IN events */
if (response_type == XCB_CLIENT_MESSAGE) {
xcb_client_message_event_t *cme = (xcb_client_message_event_t *)event;
if (cme->type == connection->atom(QXcbAtom::_XEMBED)
&& cme->data.data32[1] == XEMBED_FOCUS_IN)
return true;
}
return false;
}
void QXcbWindow::doFocusOut()
{
connection()->setFocusWindow(nullptr);
relayFocusToModalWindow();
// Do not set the active window to nullptr if there is a FocusIn coming.
// The FocusIn handler will update QXcbConnection::setFocusWindow() accordingly.
connection()->addPeekFunc(focusInPeeker);
}
struct QtMotifWmHints {
quint32 flags, functions, decorations;
qint32 input_mode;
quint32 status;
};
enum {
MWM_HINTS_FUNCTIONS = (1L << 0),
MWM_FUNC_ALL = (1L << 0),
MWM_FUNC_RESIZE = (1L << 1),
MWM_FUNC_MOVE = (1L << 2),
MWM_FUNC_MINIMIZE = (1L << 3),
MWM_FUNC_MAXIMIZE = (1L << 4),
MWM_FUNC_CLOSE = (1L << 5),
MWM_HINTS_DECORATIONS = (1L << 1),
MWM_DECOR_ALL = (1L << 0),
MWM_DECOR_BORDER = (1L << 1),
MWM_DECOR_RESIZEH = (1L << 2),
MWM_DECOR_TITLE = (1L << 3),
MWM_DECOR_MENU = (1L << 4),
MWM_DECOR_MINIMIZE = (1L << 5),
MWM_DECOR_MAXIMIZE = (1L << 6),
MWM_HINTS_INPUT_MODE = (1L << 2),
MWM_INPUT_MODELESS = 0L,
MWM_INPUT_PRIMARY_APPLICATION_MODAL = 1L,
MWM_INPUT_FULL_APPLICATION_MODAL = 3L
};
static QtMotifWmHints getMotifWmHints(QXcbConnection *c, xcb_window_t window)
{
QtMotifWmHints hints;
auto reply = Q_XCB_REPLY_UNCHECKED(xcb_get_property, c->xcb_connection(), 0, window,
c->atom(QXcbAtom::_MOTIF_WM_HINTS), c->atom(QXcbAtom::_MOTIF_WM_HINTS), 0, 20);
if (reply && reply->format == 32 && reply->type == c->atom(QXcbAtom::_MOTIF_WM_HINTS)) {
hints = *((QtMotifWmHints *)xcb_get_property_value(reply.get()));
} else {
hints.flags = 0L;
hints.functions = MWM_FUNC_ALL;
hints.decorations = MWM_DECOR_ALL;
hints.input_mode = 0L;
hints.status = 0L;
}
return hints;
}
static void setMotifWmHints(QXcbConnection *c, xcb_window_t window, const QtMotifWmHints &hints)
{
if (hints.flags != 0l) {
xcb_change_property(c->xcb_connection(),
XCB_PROP_MODE_REPLACE,
window,
c->atom(QXcbAtom::_MOTIF_WM_HINTS),
c->atom(QXcbAtom::_MOTIF_WM_HINTS),
32,
5,
&hints);
} else {
xcb_delete_property(c->xcb_connection(), window, c->atom(QXcbAtom::_MOTIF_WM_HINTS));
}
}
QXcbWindow::NetWmStates QXcbWindow::netWmStates()
{
NetWmStates result(0);
auto reply = Q_XCB_REPLY_UNCHECKED(xcb_get_property, xcb_connection(),
0, m_window, atom(QXcbAtom::_NET_WM_STATE),
XCB_ATOM_ATOM, 0, 1024);
if (reply && reply->format == 32 && reply->type == XCB_ATOM_ATOM) {
const xcb_atom_t *states = static_cast<const xcb_atom_t *>(xcb_get_property_value(reply.get()));