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/* Copyright 2019-2020 Pierre Ossman <ossman@cendio.se> for Cendio AB
* Copyright 2019 Aaron Sowry for Cendio AB
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <assert.h>
#include <map>
#if !defined(WIN32) && !defined(__APPLE__)
#include <X11/extensions/XInput2.h>
#include <X11/extensions/XI2.h>
#endif
#include <FL/Fl.H>
#include <FL/x.H>
#include <rfb/LogWriter.h>
#include "i18n.h"
#include "vncviewer.h"
#if !defined(WIN32) && !defined(__APPLE__)
#include "XInputTouchHandler.h"
#endif
#include "touch.h"
static rfb::LogWriter vlog("Touch");
#if !defined(WIN32) && !defined(__APPLE__)
static int xi_major;
typedef std::map<Window, class XInputTouchHandler*> HandlerMap;
static HandlerMap handlers;
#endif
#if !defined(WIN32) && !defined(__APPLE__)
static void x11_change_touch_ownership(bool enable)
{
HandlerMap::const_iterator iter;
XIEventMask *curmasks;
int num_masks;
XIEventMask newmask;
unsigned char mask[XIMaskLen(XI_LASTEVENT)] = { 0 };
newmask.mask = mask;
newmask.mask_len = sizeof(mask);
for (iter = handlers.begin(); iter != handlers.end(); ++iter) {
curmasks = XIGetSelectedEvents(fl_display, iter->first, &num_masks);
if (curmasks == NULL) {
if (num_masks == -1)
vlog.error(_("Unable to get X Input 2 event mask for window 0x%08lu"), iter->first);
continue;
}
// Our windows should only have a single mask, which allows us to
// simplify all the code handling the masks
if (num_masks > 1) {
vlog.error(_("Window 0x%08lu has more than one X Input 2 event mask"), iter->first);
continue;
}
newmask.deviceid = curmasks[0].deviceid;
assert(newmask.mask_len >= curmasks[0].mask_len);
memcpy(newmask.mask, curmasks[0].mask, curmasks[0].mask_len);
if (enable)
XISetMask(newmask.mask, XI_TouchOwnership);
else
XIClearMask(newmask.mask, XI_TouchOwnership);
XISelectEvents(fl_display, iter->first, &newmask, 1);
XFree(curmasks);
}
}
bool x11_grab_pointer(Window window)
{
bool ret;
if (handlers.count(window) == 0) {
vlog.error(_("Invalid window 0x%08lu specified for pointer grab"), window);
return BadWindow;
}
// We need to remove XI_TouchOwnership from our event masks while
// grabbing as otherwise we will get double events (one for the grab,
// and one because of XI_TouchOwnership) with no way of telling them
// apart. See XInputTouchHandler constructor for why we use this
// event.
x11_change_touch_ownership(false);
ret = handlers[window]->grabPointer();
if (!ret)
x11_change_touch_ownership(true);
return ret;
}
void x11_ungrab_pointer(Window window)
{
if (handlers.count(window) == 0) {
vlog.error(_("Invalid window 0x%08lu specified for pointer grab"), window);
return;
}
handlers[window]->ungrabPointer();
// Restore XI_TouchOwnership now that the grab is gone
x11_change_touch_ownership(true);
}
#endif
static int handleTouchEvent(void *event, void *data)
{
#if !defined(WIN32) && !defined(__APPLE__)
XEvent *xevent = (XEvent*)event;
if (xevent->type == MapNotify) {
handlers[xevent->xmap.window] = new XInputTouchHandler(xevent->xmap.window);
// Fall through as we don't want to interfere with whatever someone
// else might want to do with this event
} else if (xevent->type == UnmapNotify) {
delete handlers[xevent->xunmap.window];
handlers.erase(xevent->xunmap.window);
} else if (xevent->type == DestroyNotify) {
delete handlers[xevent->xdestroywindow.window];
handlers.erase(xevent->xdestroywindow.window);
} else if (xevent->type == GenericEvent) {
if (xevent->xgeneric.extension == xi_major) {
XIDeviceEvent *devev;
if (!XGetEventData(fl_display, &xevent->xcookie)) {
vlog.error(_("Failed to get event data for X Input event"));
return 1;
}
devev = (XIDeviceEvent*)xevent->xcookie.data;
if (handlers.count(devev->event) == 0) {
// We get these when the mouse is grabbed implicitly, so just
// ignore them
// https://gitlab.freedesktop.org/xorg/xserver/-/issues/1026
if ((devev->evtype == XI_Enter) || (devev->evtype == XI_Leave))
;
else
vlog.error(_("X Input event for unknown window"));
XFreeEventData(fl_display, &xevent->xcookie);
return 1;
}
handlers[devev->event]->processEvent(devev);
XFreeEventData(fl_display, &xevent->xcookie);
return 1;
}
}
#endif
return 0;
}
void enable_touch()
{
#if !defined(WIN32) && !defined(__APPLE__)
int ev, err;
int major_ver, minor_ver;
fl_open_display();
if (!XQueryExtension(fl_display, "XInputExtension", &xi_major, &ev, &err)) {
exit_vncviewer(_("X Input extension not available."));
return; // Not reached
}
major_ver = 2;
minor_ver = 2;
if (XIQueryVersion(fl_display, &major_ver, &minor_ver) != Success) {
exit_vncviewer(_("X Input 2 (or newer) is not available."));
return; // Not reached
}
if ((major_ver == 2) && (minor_ver < 2))
vlog.error(_("X Input 2.2 (or newer) is not available. Touch gestures will not be supported."));
#endif
Fl::add_system_handler(handleTouchEvent, NULL);
}
void disable_touch()
{
Fl::remove_system_handler(handleTouchEvent);
}
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