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| 1 // Copyright (c) 2011 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. | |
| 4 | |
| 5 #include "views/touchui/touch_factory.h" | |
| 6 | |
| 7 #include <gtk/gtk.h> | |
| 8 #include <gdk/gdkx.h> | |
| 9 #include <X11/cursorfont.h> | |
| 10 #include <X11/extensions/XInput.h> | |
| 11 #include <X11/extensions/XInput2.h> | |
| 12 #include <X11/extensions/XIproto.h> | |
| 13 | |
| 14 #include "base/basictypes.h" | |
| 15 #include "base/compiler_specific.h" | |
| 16 #include "base/logging.h" | |
| 17 #include "base/message_loop.h" | |
| 18 #include "ui/base/x/x11_util.h" | |
| 19 | |
| 20 namespace { | |
| 21 | |
| 22 // The X cursor is hidden if it is idle for kCursorIdleSeconds seconds. | |
| 23 int kCursorIdleSeconds = 5; | |
| 24 | |
| 25 // Given the TouchParam, return the correspoding XIValuatorClassInfo using | |
| 26 // the X device information through Atom name matching. | |
| 27 XIValuatorClassInfo* FindTPValuator(Display* display, | |
| 28 XIDeviceInfo* info, | |
| 29 views::TouchFactory::TouchParam tp) { | |
| 30 // Lookup table for mapping TouchParam to Atom string used in X. | |
| 31 // A full set of Atom strings can be found at xserver-properties.h. | |
| 32 // For Slot ID, See this chromeos revision: http://git.chromium.org/gitweb/? | |
| 33 // p=chromiumos/overlays/chromiumos-overlay.git; | |
| 34 // a=commit;h=9164d0a75e48c4867e4ef4ab51f743ae231c059a | |
| 35 static struct { | |
| 36 views::TouchFactory::TouchParam tp; | |
| 37 const char* atom; | |
| 38 } kTouchParamAtom[] = { | |
| 39 { views::TouchFactory::TP_TOUCH_MAJOR, "Abs MT Touch Major" }, | |
| 40 { views::TouchFactory::TP_TOUCH_MINOR, "Abs MT Touch Minor" }, | |
| 41 { views::TouchFactory::TP_ORIENTATION, "Abs MT Orientation" }, | |
| 42 { views::TouchFactory::TP_PRESSURE, "Abs MT Pressure" }, | |
| 43 { views::TouchFactory::TP_SLOT_ID, "Abs MT Slot ID" }, | |
| 44 { views::TouchFactory::TP_TRACKING_ID, "Abs MT Tracking ID" }, | |
| 45 { views::TouchFactory::TP_LAST_ENTRY, NULL }, | |
| 46 }; | |
| 47 | |
| 48 const char* atom_tp = NULL; | |
| 49 | |
| 50 for (size_t i = 0; i < ARRAYSIZE_UNSAFE(kTouchParamAtom); i++) { | |
| 51 if (tp == kTouchParamAtom[i].tp) { | |
| 52 atom_tp = kTouchParamAtom[i].atom; | |
| 53 break; | |
| 54 } | |
| 55 } | |
| 56 | |
| 57 if (!atom_tp) | |
| 58 return NULL; | |
| 59 | |
| 60 for (int i = 0; i < info->num_classes; i++) { | |
| 61 if (info->classes[i]->type != XIValuatorClass) | |
| 62 continue; | |
| 63 XIValuatorClassInfo* v = | |
| 64 reinterpret_cast<XIValuatorClassInfo*>(info->classes[i]); | |
| 65 | |
| 66 const char* atom = XGetAtomName(display, v->label); | |
| 67 if (atom && strcmp(atom, atom_tp) == 0) | |
| 68 return v; | |
| 69 } | |
| 70 | |
| 71 return NULL; | |
| 72 } | |
| 73 | |
| 74 // Setup XInput2 select for the GtkWidget. | |
| 75 gboolean GtkWidgetRealizeCallback(GSignalInvocationHint* hint, guint nparams, | |
| 76 const GValue* pvalues, gpointer data) { | |
| 77 GtkWidget* widget = GTK_WIDGET(g_value_get_object(pvalues)); | |
| 78 GdkWindow* window = widget->window; | |
| 79 views::TouchFactory* factory = static_cast<views::TouchFactory*>(data); | |
| 80 | |
| 81 if (GDK_WINDOW_TYPE(window) != GDK_WINDOW_TOPLEVEL && | |
| 82 GDK_WINDOW_TYPE(window) != GDK_WINDOW_CHILD && | |
| 83 GDK_WINDOW_TYPE(window) != GDK_WINDOW_DIALOG) | |
| 84 return true; | |
| 85 | |
| 86 factory->SetupXI2ForXWindow(GDK_WINDOW_XID(window)); | |
| 87 return true; | |
| 88 } | |
| 89 | |
| 90 // We need to capture all the GDK windows that get created, and start | |
| 91 // listening for XInput2 events. So we setup a callback to the 'realize' | |
| 92 // signal for GTK+ widgets, so that whenever the signal triggers for any | |
| 93 // GtkWidget, which means the GtkWidget should now have a GdkWindow, we can | |
| 94 // setup XInput2 events for the GdkWindow. | |
| 95 guint realize_signal_id = 0; | |
| 96 guint realize_hook_id = 0; | |
| 97 | |
| 98 void SetupGtkWidgetRealizeNotifier(views::TouchFactory* factory) { | |
| 99 gpointer klass = g_type_class_ref(GTK_TYPE_WIDGET); | |
| 100 | |
| 101 g_signal_parse_name("realize", GTK_TYPE_WIDGET, | |
| 102 &realize_signal_id, NULL, FALSE); | |
| 103 realize_hook_id = g_signal_add_emission_hook(realize_signal_id, 0, | |
| 104 GtkWidgetRealizeCallback, static_cast<gpointer>(factory), NULL); | |
| 105 | |
| 106 g_type_class_unref(klass); | |
| 107 } | |
| 108 | |
| 109 void RemoveGtkWidgetRealizeNotifier() { | |
| 110 if (realize_signal_id != 0) | |
| 111 g_signal_remove_emission_hook(realize_signal_id, realize_hook_id); | |
| 112 realize_signal_id = 0; | |
| 113 realize_hook_id = 0; | |
| 114 } | |
| 115 | |
| 116 } // namespace | |
| 117 | |
| 118 namespace views { | |
| 119 | |
| 120 // static | |
| 121 TouchFactory* TouchFactory::GetInstance() { | |
| 122 return Singleton<TouchFactory>::get(); | |
| 123 } | |
| 124 | |
| 125 TouchFactory::TouchFactory() | |
| 126 : is_cursor_visible_(true), | |
| 127 keep_mouse_cursor_(false), | |
| 128 cursor_timer_(), | |
| 129 pointer_device_lookup_(), | |
| 130 touch_device_list_(), | |
| 131 slots_used_() { | |
| 132 #if defined(TOUCH_UI) | |
| 133 if (!base::MessagePumpForUI::HasXInput2()) | |
| 134 return; | |
| 135 #endif | |
| 136 | |
| 137 char nodata[] = { 0, 0, 0, 0, 0, 0, 0, 0 }; | |
| 138 XColor black; | |
| 139 black.red = black.green = black.blue = 0; | |
| 140 Display* display = ui::GetXDisplay(); | |
| 141 Pixmap blank = XCreateBitmapFromData(display, ui::GetX11RootWindow(), | |
| 142 nodata, 8, 8); | |
| 143 invisible_cursor_ = XCreatePixmapCursor(display, blank, blank, | |
| 144 &black, &black, 0, 0); | |
| 145 arrow_cursor_ = XCreateFontCursor(display, XC_arrow); | |
| 146 | |
| 147 SetCursorVisible(false, false); | |
| 148 UpdateDeviceList(display); | |
| 149 | |
| 150 // TODO(sad): Here, we only setup so that the X windows created by GTK+ are | |
| 151 // setup for XInput2 events. We need a way to listen for XInput2 events for X | |
| 152 // windows created by other means (e.g. for context menus). | |
| 153 SetupGtkWidgetRealizeNotifier(this); | |
| 154 | |
| 155 // Make sure the list of devices is kept up-to-date by listening for | |
| 156 // XI_HierarchyChanged event on the root window. | |
| 157 unsigned char mask[XIMaskLen(XI_LASTEVENT)]; | |
| 158 memset(mask, 0, sizeof(mask)); | |
| 159 | |
| 160 XISetMask(mask, XI_HierarchyChanged); | |
| 161 | |
| 162 XIEventMask evmask; | |
| 163 evmask.deviceid = XIAllDevices; | |
| 164 evmask.mask_len = sizeof(mask); | |
| 165 evmask.mask = mask; | |
| 166 XISelectEvents(display, ui::GetX11RootWindow(), &evmask, 1); | |
| 167 } | |
| 168 | |
| 169 TouchFactory::~TouchFactory() { | |
| 170 #if defined(TOUCH_UI) | |
| 171 if (!base::MessagePumpForUI::HasXInput2()) | |
| 172 return; | |
| 173 #endif | |
| 174 | |
| 175 SetCursorVisible(true, false); | |
| 176 Display* display = ui::GetXDisplay(); | |
| 177 XFreeCursor(display, invisible_cursor_); | |
| 178 XFreeCursor(display, arrow_cursor_); | |
| 179 | |
| 180 RemoveGtkWidgetRealizeNotifier(); | |
| 181 } | |
| 182 | |
| 183 void TouchFactory::UpdateDeviceList(Display* display) { | |
| 184 // Detect touch devices. | |
| 185 // NOTE: The new API for retrieving the list of devices (XIQueryDevice) does | |
| 186 // not provide enough information to detect a touch device. As a result, the | |
| 187 // old version of query function (XListInputDevices) is used instead. | |
| 188 // If XInput2 is not supported, this will return null (with count of -1) so | |
| 189 // we assume there cannot be any touch devices. | |
| 190 int count = 0; | |
| 191 touch_device_lookup_.reset(); | |
| 192 touch_device_list_.clear(); | |
| 193 XDeviceInfo* devlist = XListInputDevices(display, &count); | |
| 194 for (int i = 0; i < count; i++) { | |
| 195 if (devlist[i].type) { | |
| 196 const char* devtype = XGetAtomName(display, devlist[i].type); | |
| 197 if (devtype && !strcmp(devtype, XI_TOUCHSCREEN)) { | |
| 198 touch_device_lookup_[devlist[i].id] = true; | |
| 199 touch_device_list_.push_back(devlist[i].id); | |
| 200 } | |
| 201 } | |
| 202 } | |
| 203 if (devlist) | |
| 204 XFreeDeviceList(devlist); | |
| 205 | |
| 206 // Instead of asking X for the list of devices all the time, let's maintain a | |
| 207 // list of pointer devices we care about. | |
| 208 // It should not be necessary to select for slave devices. XInput2 provides | |
| 209 // enough information to the event callback to decide which slave device | |
| 210 // triggered the event, thus decide whether the 'pointer event' is a | |
| 211 // 'mouse event' or a 'touch event'. | |
| 212 // However, on some desktops, some events from a master pointer are | |
| 213 // not delivered to the client. So we select for slave devices instead. | |
| 214 // If the touch device has 'GrabDevice' set and 'SendCoreEvents' unset (which | |
| 215 // is possible), then the device is detected as a floating device, and a | |
| 216 // floating device is not connected to a master device. So it is necessary to | |
| 217 // also select on the floating devices. | |
| 218 pointer_device_lookup_.reset(); | |
| 219 XIDeviceInfo* devices = XIQueryDevice(display, XIAllDevices, &count); | |
| 220 for (int i = 0; i < count; i++) { | |
| 221 XIDeviceInfo* devinfo = devices + i; | |
| 222 if (devinfo->use == XIFloatingSlave || devinfo->use == XISlavePointer) { | |
| 223 pointer_device_lookup_[devinfo->deviceid] = true; | |
| 224 } | |
| 225 } | |
| 226 if (devices) | |
| 227 XIFreeDeviceInfo(devices); | |
| 228 | |
| 229 SetupValuator(); | |
| 230 } | |
| 231 | |
| 232 bool TouchFactory::ShouldProcessXI2Event(XEvent* xev) { | |
| 233 DCHECK_EQ(GenericEvent, xev->type); | |
| 234 | |
| 235 XGenericEventCookie* cookie = &xev->xcookie; | |
| 236 if (cookie->evtype != XI_ButtonPress && | |
| 237 cookie->evtype != XI_ButtonRelease && | |
| 238 cookie->evtype != XI_Motion) | |
| 239 return true; | |
| 240 | |
| 241 XIDeviceEvent* xiev = static_cast<XIDeviceEvent*>(cookie->data); | |
| 242 return pointer_device_lookup_[xiev->deviceid]; | |
| 243 } | |
| 244 | |
| 245 void TouchFactory::SetupXI2ForXWindow(Window window) { | |
| 246 // Setup mask for mouse events. It is possible that a device is loaded/plugged | |
| 247 // in after we have setup XInput2 on a window. In such cases, we need to | |
| 248 // either resetup XInput2 for the window, so that we get events from the new | |
| 249 // device, or we need to listen to events from all devices, and then filter | |
| 250 // the events from uninteresting devices. We do the latter because that's | |
| 251 // simpler. | |
| 252 | |
| 253 Display* display = ui::GetXDisplay(); | |
| 254 | |
| 255 unsigned char mask[XIMaskLen(XI_LASTEVENT)]; | |
| 256 memset(mask, 0, sizeof(mask)); | |
| 257 | |
| 258 XISetMask(mask, XI_ButtonPress); | |
| 259 XISetMask(mask, XI_ButtonRelease); | |
| 260 XISetMask(mask, XI_Motion); | |
| 261 | |
| 262 XIEventMask evmask; | |
| 263 evmask.deviceid = XIAllDevices; | |
| 264 evmask.mask_len = sizeof(mask); | |
| 265 evmask.mask = mask; | |
| 266 XISelectEvents(display, window, &evmask, 1); | |
| 267 XFlush(display); | |
| 268 } | |
| 269 | |
| 270 void TouchFactory::SetTouchDeviceList( | |
| 271 const std::vector<unsigned int>& devices) { | |
| 272 touch_device_lookup_.reset(); | |
| 273 touch_device_list_.clear(); | |
| 274 for (std::vector<unsigned int>::const_iterator iter = devices.begin(); | |
| 275 iter != devices.end(); ++iter) { | |
| 276 DCHECK(*iter < touch_device_lookup_.size()); | |
| 277 touch_device_lookup_[*iter] = true; | |
| 278 touch_device_list_.push_back(*iter); | |
| 279 } | |
| 280 | |
| 281 SetupValuator(); | |
| 282 } | |
| 283 | |
| 284 bool TouchFactory::IsTouchDevice(unsigned deviceid) const { | |
| 285 return deviceid < touch_device_lookup_.size() ? | |
| 286 touch_device_lookup_[deviceid] : false; | |
| 287 } | |
| 288 | |
| 289 bool TouchFactory::IsSlotUsed(int slot) const { | |
| 290 CHECK_LT(slot, kMaxTouchPoints); | |
| 291 return slots_used_[slot]; | |
| 292 } | |
| 293 | |
| 294 void TouchFactory::SetSlotUsed(int slot, bool used) { | |
| 295 CHECK_LT(slot, kMaxTouchPoints); | |
| 296 slots_used_[slot] = used; | |
| 297 } | |
| 298 | |
| 299 bool TouchFactory::GrabTouchDevices(Display* display, ::Window window) { | |
| 300 #if defined(TOUCH_UI) | |
| 301 if (!base::MessagePumpForUI::HasXInput2() || | |
| 302 touch_device_list_.empty()) | |
| 303 return true; | |
| 304 #endif | |
| 305 | |
| 306 unsigned char mask[XIMaskLen(XI_LASTEVENT)]; | |
| 307 bool success = true; | |
| 308 | |
| 309 memset(mask, 0, sizeof(mask)); | |
| 310 XISetMask(mask, XI_ButtonPress); | |
| 311 XISetMask(mask, XI_ButtonRelease); | |
| 312 XISetMask(mask, XI_Motion); | |
| 313 | |
| 314 XIEventMask evmask; | |
| 315 evmask.mask_len = sizeof(mask); | |
| 316 evmask.mask = mask; | |
| 317 for (std::vector<int>::const_iterator iter = | |
| 318 touch_device_list_.begin(); | |
| 319 iter != touch_device_list_.end(); ++iter) { | |
| 320 evmask.deviceid = *iter; | |
| 321 Status status = XIGrabDevice(display, *iter, window, CurrentTime, None, | |
| 322 GrabModeAsync, GrabModeAsync, False, &evmask); | |
| 323 success = success && status == GrabSuccess; | |
| 324 } | |
| 325 | |
| 326 return success; | |
| 327 } | |
| 328 | |
| 329 bool TouchFactory::UngrabTouchDevices(Display* display) { | |
| 330 #if defined(TOUCH_UI) | |
| 331 if (!base::MessagePumpForUI::HasXInput2()) | |
| 332 return true; | |
| 333 #endif | |
| 334 | |
| 335 bool success = true; | |
| 336 for (std::vector<int>::const_iterator iter = | |
| 337 touch_device_list_.begin(); | |
| 338 iter != touch_device_list_.end(); ++iter) { | |
| 339 Status status = XIUngrabDevice(display, *iter, CurrentTime); | |
| 340 success = success && status == GrabSuccess; | |
| 341 } | |
| 342 return success; | |
| 343 } | |
| 344 | |
| 345 void TouchFactory::SetCursorVisible(bool show, bool start_timer) { | |
| 346 #if defined(TOUCH_UI) | |
| 347 if (!base::MessagePumpForUI::HasXInput2()) | |
| 348 return; | |
| 349 #endif | |
| 350 | |
| 351 // The cursor is going to be shown. Reset the timer for hiding it. | |
| 352 if (show && start_timer) { | |
| 353 cursor_timer_.Stop(); | |
| 354 cursor_timer_.Start( | |
| 355 FROM_HERE, base::TimeDelta::FromSeconds(kCursorIdleSeconds), | |
| 356 this, &TouchFactory::HideCursorForInactivity); | |
| 357 } else { | |
| 358 cursor_timer_.Stop(); | |
| 359 } | |
| 360 | |
| 361 if (show == is_cursor_visible_) | |
| 362 return; | |
| 363 | |
| 364 is_cursor_visible_ = show; | |
| 365 | |
| 366 Display* display = ui::GetXDisplay(); | |
| 367 Window window = DefaultRootWindow(display); | |
| 368 | |
| 369 if (is_cursor_visible_) { | |
| 370 XDefineCursor(display, window, arrow_cursor_); | |
| 371 } else { | |
| 372 XDefineCursor(display, window, invisible_cursor_); | |
| 373 } | |
| 374 } | |
| 375 | |
| 376 void TouchFactory::SetupValuator() { | |
| 377 memset(valuator_lookup_, -1, sizeof(valuator_lookup_)); | |
| 378 memset(touch_param_min_, 0, sizeof(touch_param_min_)); | |
| 379 memset(touch_param_max_, 0, sizeof(touch_param_max_)); | |
| 380 | |
| 381 Display* display = ui::GetXDisplay(); | |
| 382 int ndevice; | |
| 383 XIDeviceInfo* info_list = XIQueryDevice(display, XIAllDevices, &ndevice); | |
| 384 | |
| 385 for (int i = 0; i < ndevice; i++) { | |
| 386 XIDeviceInfo* info = info_list + i; | |
| 387 | |
| 388 if (!IsTouchDevice(info->deviceid)) | |
| 389 continue; | |
| 390 | |
| 391 for (int j = 0; j < TP_LAST_ENTRY; j++) { | |
| 392 TouchParam tp = static_cast<TouchParam>(j); | |
| 393 XIValuatorClassInfo* valuator = FindTPValuator(display, info, tp); | |
| 394 if (valuator) { | |
| 395 valuator_lookup_[info->deviceid][j] = valuator->number; | |
| 396 touch_param_min_[info->deviceid][j] = valuator->min; | |
| 397 touch_param_max_[info->deviceid][j] = valuator->max; | |
| 398 } | |
| 399 } | |
| 400 } | |
| 401 | |
| 402 if (info_list) | |
| 403 XIFreeDeviceInfo(info_list); | |
| 404 } | |
| 405 | |
| 406 bool TouchFactory::ExtractTouchParam(const XEvent& xev, | |
| 407 TouchParam tp, | |
| 408 float* value) { | |
| 409 XIDeviceEvent* xiev = static_cast<XIDeviceEvent*>(xev.xcookie.data); | |
| 410 if (xiev->sourceid >= kMaxDeviceNum) | |
| 411 return false; | |
| 412 int v = valuator_lookup_[xiev->sourceid][tp]; | |
| 413 if (v >= 0 && XIMaskIsSet(xiev->valuators.mask, v)) { | |
| 414 *value = xiev->valuators.values[v]; | |
| 415 return true; | |
| 416 } | |
| 417 | |
| 418 return false; | |
| 419 } | |
| 420 | |
| 421 bool TouchFactory::NormalizeTouchParam(unsigned int deviceid, | |
| 422 TouchParam tp, | |
| 423 float* value) { | |
| 424 float max_value; | |
| 425 float min_value; | |
| 426 if (GetTouchParamRange(deviceid, tp, &min_value, &max_value)) { | |
| 427 *value = (*value - min_value) / (max_value - min_value); | |
| 428 DCHECK(*value >= 0.0 && *value <= 1.0); | |
| 429 return true; | |
| 430 } | |
| 431 return false; | |
| 432 } | |
| 433 | |
| 434 bool TouchFactory::GetTouchParamRange(unsigned int deviceid, | |
| 435 TouchParam tp, | |
| 436 float* min, | |
| 437 float* max) { | |
| 438 if (valuator_lookup_[deviceid][tp] >= 0) { | |
| 439 *min = touch_param_min_[deviceid][tp]; | |
| 440 *max = touch_param_max_[deviceid][tp]; | |
| 441 return true; | |
| 442 } | |
| 443 return false; | |
| 444 } | |
| 445 | |
| 446 } // namespace views | |
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Chromium Code Reviews
Issue 7942004:
Consolidate/cleanup event cracking code; single out GdkEvents. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src