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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QXCBDRAG_H
#define QXCBDRAG_H
#include <qpa/qplatformdrag.h>
#include <private/qsimpledrag_p.h>
#include <xcb/xcb.h>
#include <qbackingstore.h>
#include <qdatetime.h>
#include <qlist.h>
#include <qpixmap.h>
#include <qpoint.h>
#include <qpointer.h>
#include <qrect.h>
#include <qsharedpointer.h>
#include <qxcbobject.h>
#include <QtCore/QDebug>
QT_REQUIRE_CONFIG(draganddrop);
QT_BEGIN_NAMESPACE
class QWindow;
class QPlatformWindow;
class QXcbConnection;
class QXcbWindow;
class QXcbDropData;
class QXcbScreen;
class QDrag;
class QShapedPixmapWindow;
class QXcbDrag : public QXcbObject, public QBasicDrag, public QXcbWindowEventListener
{
public:
QXcbDrag(QXcbConnection *c);
~QXcbDrag();
bool eventFilter(QObject *o, QEvent *e) override;
void startDrag() override;
void cancel() override;
void move(const QPoint &globalPos, Qt::MouseButtons b, Qt::KeyboardModifiers mods) override;
void drop(const QPoint &globalPos, Qt::MouseButtons b, Qt::KeyboardModifiers mods) override;
void endDrag() override;
Qt::DropAction defaultAction(Qt::DropActions possibleActions, Qt::KeyboardModifiers modifiers) const override;
void handlePropertyNotifyEvent(const xcb_property_notify_event_t *event) override;
void handleEnter(QPlatformWindow *window, const xcb_client_message_event_t *event, xcb_window_t proxy = 0);
void handlePosition(QPlatformWindow *w, const xcb_client_message_event_t *event);
void handleLeave(QPlatformWindow *w, const xcb_client_message_event_t *event);
void handleDrop(QPlatformWindow *, const xcb_client_message_event_t *event,
Qt::MouseButtons b = { }, Qt::KeyboardModifiers mods = { });
void handleStatus(const xcb_client_message_event_t *event);
void handleSelectionRequest(const xcb_selection_request_event_t *event);
void handleFinished(const xcb_client_message_event_t *event);
bool dndEnable(QXcbWindow *win, bool on);
bool ownsDragObject() const override;
void updatePixmap();
xcb_timestamp_t targetTime() { return target_time; }
protected:
void timerEvent(QTimerEvent* e) override;
bool findXdndAwareTarget(const QPoint &globalPos, xcb_window_t *target_out);
private:
friend class QXcbDropData;
void init();
void handle_xdnd_position(QPlatformWindow *w, const xcb_client_message_event_t *event,
Qt::MouseButtons b = { }, Qt::KeyboardModifiers mods = { });
void handle_xdnd_status(const xcb_client_message_event_t *event);
void send_leave();
Qt::DropAction toDropAction(xcb_atom_t atom) const;
Qt::DropActions toDropActions(const QList<xcb_atom_t> &atoms) const;
xcb_atom_t toXdndAction(Qt::DropAction a) const;
void readActionList();
void setActionList(Qt::DropAction requestedAction, Qt::DropActions supportedActions);
void startListeningForActionListChanges();
void stopListeningForActionListChanges();
QPointer<QWindow> initiatorWindow;
QPointer<QWindow> currentWindow;
QPoint currentPosition;
QXcbDropData *m_dropData;
Qt::DropAction accepted_drop_action;
QWindow *desktop_proxy;
xcb_atom_t xdnd_dragsource;
// the types in this drop. 100 is no good, but at least it's big.
enum { xdnd_max_type = 100 };
QList<xcb_atom_t> xdnd_types;
// timestamp from XdndPosition and XdndDroptime for retrieving the data
xcb_timestamp_t target_time;
xcb_timestamp_t source_time;
// rectangle in which the answer will be the same
QRect source_sameanswer;
bool waiting_for_status;
// helpers for setting executed drop action outside application
bool dropped;
bool canceled;
// A window from Unity DnD Manager, which does not respect the XDnD spec
xcb_window_t xdndCollectionWindow = XCB_NONE;
// top-level window we sent position to last.
xcb_window_t current_target;
// window to send events to (always valid if current_target)
xcb_window_t current_proxy_target;
QXcbVirtualDesktop *current_virtual_desktop;
// 10 minute timer used to discard old XdndDrop transactions
enum { XdndDropTransactionTimeout = 600000 };
int cleanup_timer;
QList<xcb_atom_t> drag_types;
QList<xcb_atom_t> current_actions;
QList<xcb_atom_t> drop_actions;
struct Transaction
{
xcb_timestamp_t timestamp;
xcb_window_t target;
xcb_window_t proxy_target;
QPlatformWindow *targetWindow;
// QWidget *embedding_widget;
QPointer<QDrag> drag;
QTime time;
};
friend class QTypeInfo<Transaction>;
QList<Transaction> transactions;
int transaction_expiry_timer;
void restartDropExpiryTimer();
int findTransactionByWindow(xcb_window_t window);
int findTransactionByTime(xcb_timestamp_t timestamp);
xcb_window_t findRealWindow(const QPoint & pos, xcb_window_t w, int md, bool ignoreNonXdndAwareWindows);
};
Q_DECLARE_TYPEINFO(QXcbDrag::Transaction, Q_RELOCATABLE_TYPE);
QT_END_NAMESPACE
#endif
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