| // Copyright 2015 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "base/logging.h" |
| #include "ui/base/x/x11_util.h" |
| #include "ui/events/devices/x11/device_data_manager_x11.h" |
| #include "ui/views/widget/desktop_aura/x11_pointer_grab.h" |
| |
| #include <X11/extensions/XInput2.h> |
| #include <X11/Xlib.h> |
| |
| namespace views { |
| |
| namespace { |
| |
| // The grab window. None if there are no active pointer grabs. |
| XID g_grab_window = None; |
| |
| // The "owner events" parameter used to grab the pointer. |
| bool g_owner_events = false; |
| |
| } // namespace |
| |
| int GrabPointer(XID window, bool owner_events, ::Cursor cursor) { |
| int result = GrabInvalidTime; |
| if (ui::IsXInput2Available()) { |
| // Do an XInput2 pointer grab. If there is an active XInput2 pointer grab |
| // as a result of normal button press, XGrabPointer() will fail. |
| unsigned char mask[XIMaskLen(XI_LASTEVENT)]; |
| memset(mask, 0, sizeof(mask)); |
| XISetMask(mask, XI_ButtonPress); |
| XISetMask(mask, XI_ButtonRelease); |
| XISetMask(mask, XI_Motion); |
| XISetMask(mask, XI_TouchBegin); |
| XISetMask(mask, XI_TouchUpdate); |
| XISetMask(mask, XI_TouchEnd); |
| XIEventMask evmask; |
| evmask.mask_len = sizeof(mask); |
| evmask.mask = mask; |
| |
| const std::vector<int>& master_pointers = |
| ui::DeviceDataManagerX11::GetInstance()->master_pointers(); |
| for (int master_pointer : master_pointers) { |
| evmask.deviceid = master_pointer; |
| result = XIGrabDevice( |
| gfx::GetXDisplay(), master_pointer, window, CurrentTime, cursor, |
| GrabModeAsync, GrabModeAsync, owner_events, &evmask); |
| // Assume that the grab will succeed on either all or none of the master |
| // pointers. |
| if (result != GrabSuccess) { |
| // Try core pointer grab. |
| break; |
| } |
| } |
| } |
| |
| if (result != GrabSuccess) { |
| int event_mask = PointerMotionMask | ButtonReleaseMask | ButtonPressMask; |
| result = |
| XGrabPointer(gfx::GetXDisplay(), window, owner_events, event_mask, |
| GrabModeAsync, GrabModeAsync, None, cursor, CurrentTime); |
| } |
| |
| if (result == GrabSuccess) { |
| g_grab_window = window; |
| g_owner_events = owner_events; |
| } |
| return result; |
| } |
| |
| void ChangeActivePointerGrabCursor(::Cursor cursor) { |
| DCHECK(g_grab_window != None); |
| GrabPointer(g_grab_window, g_owner_events, cursor); |
| } |
| |
| void UngrabPointer() { |
| g_grab_window = None; |
| if (ui::IsXInput2Available()) { |
| const std::vector<int>& master_pointers = |
| ui::DeviceDataManagerX11::GetInstance()->master_pointers(); |
| for (int master_pointer : master_pointers) |
| XIUngrabDevice(gfx::GetXDisplay(), master_pointer, CurrentTime); |
| } |
| // Try core pointer ungrab in case the XInput2 pointer ungrab failed. |
| XUngrabPointer(gfx::GetXDisplay(), CurrentTime); |
| } |
| |
| } // namespace views |