1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #include "ui/events/x/touch_factory_x11.h"
8 #include <X11/cursorfont.h>
9 #include <X11/extensions/XInput.h>
10 #include <X11/extensions/XInput2.h>
11 #include <X11/extensions/XIproto.h>
14 #include "base/basictypes.h"
15 #include "base/command_line.h"
16 #include "base/compiler_specific.h"
17 #include "base/logging.h"
18 #include "base/memory/singleton.h"
19 #include "base/message_loop/message_loop.h"
20 #include "base/strings/string_number_conversions.h"
21 #include "base/strings/string_split.h"
22 #include "ui/events/event_switches.h"
23 #include "ui/events/x/device_data_manager.h"
24 #include "ui/events/x/device_list_cache_x.h"
25 #include "ui/gfx/x/x11_types.h"
29 TouchFactory::TouchFactory()
30 : pointer_device_lookup_(),
31 touch_device_available_(false),
32 touch_events_disabled_(false),
34 max_touch_points_(-1),
36 if (!DeviceDataManager::GetInstance()->IsXInput2Available())
39 XDisplay* display = gfx::GetXDisplay();
40 UpdateDeviceList(display);
42 CommandLine* cmdline = CommandLine::ForCurrentProcess();
43 touch_events_disabled_ = cmdline->HasSwitch(switches::kTouchEvents) &&
44 cmdline->GetSwitchValueASCII(switches::kTouchEvents) ==
45 switches::kTouchEventsDisabled;
48 TouchFactory::~TouchFactory() {
52 TouchFactory* TouchFactory::GetInstance() {
53 return Singleton<TouchFactory>::get();
57 void TouchFactory::SetTouchDeviceListFromCommandLine() {
58 // Get a list of pointer-devices that should be treated as touch-devices.
59 // This is primarily used for testing/debugging touch-event processing when a
60 // touch-device isn't available.
61 std::string touch_devices =
62 CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
63 switches::kTouchDevices);
65 if (!touch_devices.empty()) {
66 std::vector<std::string> devs;
67 std::vector<unsigned int> device_ids;
69 base::SplitString(touch_devices, ',', &devs);
70 for (std::vector<std::string>::iterator iter = devs.begin();
71 iter != devs.end(); ++iter) {
72 if (base::StringToInt(*iter, reinterpret_cast<int*>(&devid)))
73 device_ids.push_back(devid);
75 DLOG(WARNING) << "Invalid touch-device id: " << *iter;
77 ui::TouchFactory::GetInstance()->SetTouchDeviceList(device_ids);
81 void TouchFactory::UpdateDeviceList(Display* display) {
82 // Detect touch devices.
83 touch_device_available_ = false;
84 touch_device_lookup_.reset();
85 touch_device_list_.clear();
86 touchscreen_ids_.clear();
87 max_touch_points_ = -1;
89 #if !defined(USE_XI2_MT)
90 // NOTE: The new API for retrieving the list of devices (XIQueryDevice) does
91 // not provide enough information to detect a touch device. As a result, the
92 // old version of query function (XListInputDevices) is used instead.
93 // If XInput2 is not supported, this will return null (with count of -1) so
94 // we assume there cannot be any touch devices.
95 // With XI2.1 or older, we allow only single touch devices unless
96 // |enable_xi2_mt| is turned on.
97 XDeviceList dev_list =
98 DeviceListCacheX::GetInstance()->GetXDeviceList(display);
99 #if !defined(ENABLE_XI21_MT)
100 Atom xi_touchscreen = XInternAtom(display, XI_TOUCHSCREEN, false);
102 // Certain Samsung and Intel devices support multi-touch with XInput2.1
103 // using the device type "MULTITOUCHSCREEN".
104 Atom xi_touchscreen = XInternAtom(display, "MULTITOUCHSCREEN", false);
106 for (int i = 0; i < dev_list.count; i++) {
107 if (dev_list[i].type == xi_touchscreen) {
108 touch_device_lookup_[dev_list[i].id] = true;
109 touch_device_list_[dev_list[i].id] = false;
110 touch_device_available_ = true;
115 if (!DeviceDataManager::GetInstance()->IsXInput2Available())
118 // Instead of asking X for the list of devices all the time, let's maintain a
119 // list of pointer devices we care about.
120 // It should not be necessary to select for slave devices. XInput2 provides
121 // enough information to the event callback to decide which slave device
122 // triggered the event, thus decide whether the 'pointer event' is a
123 // 'mouse event' or a 'touch event'.
124 // However, on some desktops, some events from a master pointer are
125 // not delivered to the client. So we select for slave devices instead.
126 // If the touch device has 'GrabDevice' set and 'SendCoreEvents' unset (which
127 // is possible), then the device is detected as a floating device, and a
128 // floating device is not connected to a master device. So it is necessary to
129 // also select on the floating devices.
130 pointer_device_lookup_.reset();
131 XIDeviceList xi_dev_list =
132 DeviceListCacheX::GetInstance()->GetXI2DeviceList(display);
133 for (int i = 0; i < xi_dev_list.count; i++) {
134 XIDeviceInfo* devinfo = xi_dev_list.devices + i;
135 if (devinfo->use == XIFloatingSlave || devinfo->use == XISlavePointer) {
136 #if defined(USE_XI2_MT)
137 for (int k = 0; k < devinfo->num_classes; ++k) {
138 XIAnyClassInfo* xiclassinfo = devinfo->classes[k];
139 if (xiclassinfo->type == XITouchClass) {
140 XITouchClassInfo* tci =
141 reinterpret_cast<XITouchClassInfo *>(xiclassinfo);
142 // Only care direct touch device (such as touch screen) right now
143 if (tci->mode == XIDirectTouch) {
144 CacheTouchscreenIds(display, devinfo->deviceid);
145 touch_device_lookup_[devinfo->deviceid] = true;
146 touch_device_list_[devinfo->deviceid] = true;
147 touch_device_available_ = true;
148 if (tci->num_touches > 0 && tci->num_touches > max_touch_points_)
149 max_touch_points_ = tci->num_touches;
154 pointer_device_lookup_[devinfo->deviceid] = true;
159 bool TouchFactory::ShouldProcessXI2Event(XEvent* xev) {
160 DCHECK_EQ(GenericEvent, xev->type);
161 XIEvent* event = static_cast<XIEvent*>(xev->xcookie.data);
162 XIDeviceEvent* xiev = reinterpret_cast<XIDeviceEvent*>(event);
164 #if defined(USE_XI2_MT)
165 if (event->evtype == XI_TouchBegin ||
166 event->evtype == XI_TouchUpdate ||
167 event->evtype == XI_TouchEnd) {
168 return !touch_events_disabled_ && IsTouchDevice(xiev->deviceid);
171 if (event->evtype != XI_ButtonPress &&
172 event->evtype != XI_ButtonRelease &&
173 event->evtype != XI_Motion)
176 if (!pointer_device_lookup_[xiev->deviceid])
179 return IsTouchDevice(xiev->deviceid) ? !touch_events_disabled_ : true;
182 void TouchFactory::SetupXI2ForXWindow(Window window) {
183 // Setup mask for mouse events. It is possible that a device is loaded/plugged
184 // in after we have setup XInput2 on a window. In such cases, we need to
185 // either resetup XInput2 for the window, so that we get events from the new
186 // device, or we need to listen to events from all devices, and then filter
187 // the events from uninteresting devices. We do the latter because that's
190 XDisplay* display = gfx::GetXDisplay();
192 unsigned char mask[XIMaskLen(XI_LASTEVENT)];
193 memset(mask, 0, sizeof(mask));
195 #if defined(USE_XI2_MT)
196 XISetMask(mask, XI_TouchBegin);
197 XISetMask(mask, XI_TouchUpdate);
198 XISetMask(mask, XI_TouchEnd);
200 XISetMask(mask, XI_ButtonPress);
201 XISetMask(mask, XI_ButtonRelease);
202 XISetMask(mask, XI_Motion);
205 evmask.deviceid = XIAllDevices;
206 evmask.mask_len = sizeof(mask);
208 XISelectEvents(display, window, &evmask, 1);
212 void TouchFactory::SetTouchDeviceList(
213 const std::vector<unsigned int>& devices) {
214 touch_device_lookup_.reset();
215 touch_device_list_.clear();
216 for (std::vector<unsigned int>::const_iterator iter = devices.begin();
217 iter != devices.end(); ++iter) {
218 DCHECK(*iter < touch_device_lookup_.size());
219 touch_device_lookup_[*iter] = true;
220 touch_device_list_[*iter] = false;
224 bool TouchFactory::IsTouchDevice(unsigned deviceid) const {
225 return deviceid < touch_device_lookup_.size() ?
226 touch_device_lookup_[deviceid] : false;
229 bool TouchFactory::IsMultiTouchDevice(unsigned int deviceid) const {
230 return (deviceid < touch_device_lookup_.size() &&
231 touch_device_lookup_[deviceid]) ?
232 touch_device_list_.find(deviceid)->second :
236 bool TouchFactory::QuerySlotForTrackingID(uint32 tracking_id, int* slot) {
237 if (!id_generator_.HasGeneratedIDFor(tracking_id))
239 *slot = static_cast<int>(id_generator_.GetGeneratedID(tracking_id));
243 int TouchFactory::GetSlotForTrackingID(uint32 tracking_id) {
244 return id_generator_.GetGeneratedID(tracking_id);
247 void TouchFactory::ReleaseSlotForTrackingID(uint32 tracking_id) {
248 id_generator_.ReleaseNumber(tracking_id);
251 bool TouchFactory::IsTouchDevicePresent() {
252 return !touch_events_disabled_ && touch_device_available_;
255 int TouchFactory::GetMaxTouchPoints() const {
256 return max_touch_points_;
259 void TouchFactory::SetTouchDeviceForTest(
260 const std::vector<unsigned int>& devices) {
261 touch_device_lookup_.reset();
262 touch_device_list_.clear();
263 for (std::vector<unsigned int>::const_iterator iter = devices.begin();
264 iter != devices.end(); ++iter) {
265 DCHECK(*iter < touch_device_lookup_.size());
266 touch_device_lookup_[*iter] = true;
267 touch_device_list_[*iter] = true;
269 touch_device_available_ = true;
270 touch_events_disabled_ = false;
273 void TouchFactory::SetPointerDeviceForTest(
274 const std::vector<unsigned int>& devices) {
275 pointer_device_lookup_.reset();
276 for (std::vector<unsigned int>::const_iterator iter = devices.begin();
277 iter != devices.end(); ++iter) {
278 pointer_device_lookup_[*iter] = true;
282 void TouchFactory::CacheTouchscreenIds(Display* display, int device_id) {
283 XDevice* device = XOpenDevice(display, device_id);
287 Atom actual_type_return;
288 int actual_format_return;
289 unsigned long nitems_return;
290 unsigned long bytes_after_return;
291 unsigned char *prop_return;
293 const char kDeviceProductIdString[] = "Device Product ID";
294 Atom device_product_id_atom =
295 XInternAtom(display, kDeviceProductIdString, false);
297 if (device_product_id_atom != None &&
298 XGetDeviceProperty(display, device, device_product_id_atom, 0, 2,
299 False, XA_INTEGER, &actual_type_return,
300 &actual_format_return, &nitems_return,
301 &bytes_after_return, &prop_return) == Success) {
302 if (actual_type_return == XA_INTEGER &&
303 actual_format_return == 32 &&
304 nitems_return == 2) {
305 // An actual_format_return of 32 implies that the returned data is an
306 // array of longs. See the description of |prop_return| in `man
307 // XGetDeviceProperty` for details.
308 long* ptr = reinterpret_cast<long*>(prop_return);
310 // Internal displays will have a vid and pid of 0. Ignore them.
311 // ptr[0] is the vid, and ptr[1] is the pid.
312 if (ptr[0] || ptr[1])
313 touchscreen_ids_.insert(std::make_pair(ptr[0], ptr[1]));
318 XCloseDevice(display, device);