--- /dev/null
- exit_vncviewer(e.str());
+/* 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)
+#include <windows.h>
+#include <commctrl.h>
+#elif !defined(__APPLE__)
+#include <X11/extensions/XInput2.h>
+#include <X11/extensions/XI2.h>
+#endif
+
+#include <FL/Fl.H>
+#include <FL/x.H>
+
+#include <rfb/Exception.h>
+#include <rfb/LogWriter.h>
+
+#include "i18n.h"
+#include "vncviewer.h"
+#include "BaseTouchHandler.h"
+#if defined(WIN32)
+#include "Win32TouchHandler.h"
+#elif !defined(__APPLE__)
+#include "XInputTouchHandler.h"
+#endif
+
+#include "touch.h"
+
+static rfb::LogWriter vlog("Touch");
+
+#if !defined(WIN32) && !defined(__APPLE__)
+static int xi_major;
+#endif
+
+typedef std::map<Window, class BaseTouchHandler*> HandlerMap;
+static HandlerMap handlers;
+
+#if defined(WIN32)
+LRESULT CALLBACK win32WindowProc(HWND hWnd, UINT uMsg, WPARAM wParam,
+ LPARAM lParam, UINT_PTR uIdSubclass,
+ DWORD_PTR dwRefData)
+{
+ bool handled = false;
+
+ if (uMsg == WM_NCDESTROY) {
+ delete handlers[hWnd];
+ handlers.erase(hWnd);
+ RemoveWindowSubclass(hWnd, &win32WindowProc, 1);
+ } else {
+ if (handlers.count(hWnd) == 0) {
+ vlog.error(_("Got message (0x%x) for an unhandled window"), uMsg);
+ } else {
+ handled = dynamic_cast<Win32TouchHandler*>
+ (handlers[hWnd])->processEvent(uMsg, wParam, lParam);
+ }
+ }
+
+ // Only run the normal WndProc handlers for unhandled events
+ if (handled)
+ return 0;
+ else
+ return DefSubclassProc(hWnd, uMsg, wParam, lParam);
+}
+
+#elif !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%08lx"), 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%08lx 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%08lx 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 = dynamic_cast<XInputTouchHandler*>(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%08lx specified for pointer grab"), window);
+ return;
+ }
+
+ dynamic_cast<XInputTouchHandler*>(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)
+ MSG *msg = (MSG*)event;
+
+ // Trigger on the first WM_PAINT event. We can't trigger on WM_CREATE
+ // events since FLTK's system handlers trigger before WndProc.
+ // WM_CREATE events are sent directly to WndProc.
+ if (msg->message == WM_PAINT && handlers.count(msg->hwnd) == 0) {
+ try {
+ handlers[msg->hwnd] = new Win32TouchHandler(msg->hwnd);
+ } catch (rfb::Exception& e) {
+ vlog.error(_("Failed to create touch handler: %s"), e.str());
++ exit_vncviewer(_("Failed to create touch handler: %s"), e.str());
+ }
+ // Add a special hook-in for handling events sent directly to WndProc
+ if (!SetWindowSubclass(msg->hwnd, &win32WindowProc, 1, 0)) {
+ vlog.error(_("Couldn't attach event handler to window (error 0x%x)"),
+ (int)GetLastError());
+ }
+ }
+#elif !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;
+ }
+
+ dynamic_cast<XInputTouchHandler*>(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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