Consolidate/cleanup event cracking code; single out GdkEvents.

views/touchui/touch_factory.cc

Index: views/touchui/touch_factory.cc
diff --git a/views/touchui/touch_factory.cc b/views/touchui/touch_factory.cc
deleted file mode 100644
index e644bca965c1e70b998614086f0bb8525d6ff955..0000000000000000000000000000000000000000
--- a/views/touchui/touch_factory.cc
+++ /dev/null
@@ -1,502 +0,0 @@
-// Copyright (c) 2011 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 "views/touchui/touch_factory.h"
-
-#if defined(TOOLKIT_USES_GTK)
-// TODO(sad) Remove all TOOLKIT_USES_GTK uses once we move to aura only.
-#include <gtk/gtk.h>
-#include <gdk/gdkx.h>
-#endif
-#include <X11/cursorfont.h>
-#include <X11/extensions/XInput.h>
-#include <X11/extensions/XInput2.h>
-#include <X11/extensions/XIproto.h>
-
-#include "base/basictypes.h"
-#include "base/compiler_specific.h"
-#include "base/logging.h"
-#include "base/message_loop.h"
-#include "ui/base/x/x11_util.h"
-
-namespace {
-
-// The X cursor is hidden if it is idle for kCursorIdleSeconds seconds.
-int kCursorIdleSeconds = 5;
-
-// Given the TouchParam, return the correspoding XIValuatorClassInfo using
-// the X device information through Atom name matching.
-XIValuatorClassInfo* FindTPValuator(Display* display,
-                                    XIDeviceInfo* info,
-                                    views::TouchFactory::TouchParam tp) {
-  // Lookup table for mapping TouchParam to Atom string used in X.
-  // A full set of Atom strings can be found at xserver-properties.h.
-  static struct {
-    views::TouchFactory::TouchParam tp;
-    const char* atom;
-  } kTouchParamAtom[] = {
-    { views::TouchFactory::TP_TOUCH_MAJOR, "Abs MT Touch Major" },
-    { views::TouchFactory::TP_TOUCH_MINOR, "Abs MT Touch Minor" },
-    { views::TouchFactory::TP_ORIENTATION, "Abs MT Orientation" },
-    { views::TouchFactory::TP_PRESSURE,    "Abs MT Pressure" },
-#if !defined(USE_XI2_MT)
-    // For Slot ID, See this chromeos revision: http://git.chromium.org/gitweb/?
-    //        p=chromiumos/overlays/chromiumos-overlay.git;
-    //        a=commit;h=9164d0a75e48c4867e4ef4ab51f743ae231c059a
-    { views::TouchFactory::TP_SLOT_ID,     "Abs MT Slot ID" },
-#endif
-    { views::TouchFactory::TP_TRACKING_ID, "Abs MT Tracking ID" },
-    { views::TouchFactory::TP_LAST_ENTRY, NULL },
-  };
-
-  const char* atom_tp = NULL;
-
-  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(kTouchParamAtom); i++) {
-    if (tp == kTouchParamAtom[i].tp) {
-      atom_tp = kTouchParamAtom[i].atom;
-      break;
-    }
-  }
-
-  if (!atom_tp)
-    return NULL;
-
-  for (int i = 0; i < info->num_classes; i++) {
-    if (info->classes[i]->type != XIValuatorClass)
-      continue;
-    XIValuatorClassInfo* v =
-        reinterpret_cast<XIValuatorClassInfo*>(info->classes[i]);
-
-    const char* atom = XGetAtomName(display, v->label);
-    if (atom && strcmp(atom, atom_tp) == 0)
-      return v;
-  }
-
-  return NULL;
-}
-
-#if defined(TOOLKIT_USES_GTK)
-// Setup XInput2 select for the GtkWidget.
-gboolean GtkWidgetRealizeCallback(GSignalInvocationHint* hint, guint nparams,
-                                  const GValue* pvalues, gpointer data) {
-  GtkWidget* widget = GTK_WIDGET(g_value_get_object(pvalues));
-  GdkWindow* window = widget->window;
-  views::TouchFactory* factory = static_cast<views::TouchFactory*>(data);
-
-  if (GDK_WINDOW_TYPE(window) != GDK_WINDOW_TOPLEVEL &&
-      GDK_WINDOW_TYPE(window) != GDK_WINDOW_CHILD &&
-      GDK_WINDOW_TYPE(window) != GDK_WINDOW_DIALOG)
-    return true;
-
-  factory->SetupXI2ForXWindow(GDK_WINDOW_XID(window));
-  return true;
-}
-
-// We need to capture all the GDK windows that get created, and start
-// listening for XInput2 events. So we setup a callback to the 'realize'
-// signal for GTK+ widgets, so that whenever the signal triggers for any
-// GtkWidget, which means the GtkWidget should now have a GdkWindow, we can
-// setup XInput2 events for the GdkWindow.
-guint realize_signal_id = 0;
-guint realize_hook_id = 0;
-
-void SetupGtkWidgetRealizeNotifier(views::TouchFactory* factory) {
-  gpointer klass = g_type_class_ref(GTK_TYPE_WIDGET);
-
-  g_signal_parse_name("realize", GTK_TYPE_WIDGET,
-                      &realize_signal_id, NULL, FALSE);
-  realize_hook_id = g_signal_add_emission_hook(realize_signal_id, 0,
-      GtkWidgetRealizeCallback, static_cast<gpointer>(factory), NULL);
-
-  g_type_class_unref(klass);
-}
-
-void RemoveGtkWidgetRealizeNotifier() {
-  if (realize_signal_id != 0)
-    g_signal_remove_emission_hook(realize_signal_id, realize_hook_id);
-  realize_signal_id = 0;
-  realize_hook_id = 0;
-}
-#endif
-
-}  // namespace
-
-namespace views {
-
-// static
-TouchFactory* TouchFactory::GetInstance() {
-  return Singleton<TouchFactory>::get();
-}
-
-TouchFactory::TouchFactory()
-    : is_cursor_visible_(true),
-      keep_mouse_cursor_(false),
-      cursor_timer_(),
-      pointer_device_lookup_(),
-#if defined(USE_XI2_MT)
-      touch_device_list_() {
-#else
-      touch_device_list_(),
-      slots_used_() {
-#endif
-#if defined(TOUCH_UI)
-  if (!base::MessagePumpForUI::HasXInput2())
-    return;
-#endif
-
-  char nodata[] = { 0, 0, 0, 0, 0, 0, 0, 0 };
-  XColor black;
-  black.red = black.green = black.blue = 0;
-  Display* display = ui::GetXDisplay();
-  Pixmap blank = XCreateBitmapFromData(display, ui::GetX11RootWindow(),
-                                       nodata, 8, 8);
-  invisible_cursor_ = XCreatePixmapCursor(display, blank, blank,
-                                          &black, &black, 0, 0);
-  arrow_cursor_ = XCreateFontCursor(display, XC_arrow);
-
-  SetCursorVisible(false, false);
-  UpdateDeviceList(display);
-
-#if defined(TOOLKIT_USES_GTK)
-  // TODO(sad): Here, we only setup so that the X windows created by GTK+ are
-  // setup for XInput2 events. We need a way to listen for XInput2 events for X
-  // windows created by other means (e.g. for context menus).
-  SetupGtkWidgetRealizeNotifier(this);
-#endif
-  // Make sure the list of devices is kept up-to-date by listening for
-  // XI_HierarchyChanged event on the root window.
-  unsigned char mask[XIMaskLen(XI_LASTEVENT)];
-  memset(mask, 0, sizeof(mask));
-
-  XISetMask(mask, XI_HierarchyChanged);
-
-  XIEventMask evmask;
-  evmask.deviceid = XIAllDevices;
-  evmask.mask_len = sizeof(mask);
-  evmask.mask = mask;
-  XISelectEvents(display, ui::GetX11RootWindow(), &evmask, 1);
-}
-
-TouchFactory::~TouchFactory() {
-#if defined(TOUCH_UI)
-  if (!base::MessagePumpForUI::HasXInput2())
-    return;
-#endif
-
-  SetCursorVisible(true, false);
-  Display* display = ui::GetXDisplay();
-  XFreeCursor(display, invisible_cursor_);
-  XFreeCursor(display, arrow_cursor_);
-
-#if defined(TOOLKIT_USES_GTK)
-  RemoveGtkWidgetRealizeNotifier();
-#endif
-}
-
-void TouchFactory::UpdateDeviceList(Display* display) {
-  // Detect touch devices.
-  // NOTE: The new API for retrieving the list of devices (XIQueryDevice) does
-  // not provide enough information to detect a touch device. As a result, the
-  // old version of query function (XListInputDevices) is used instead.
-  // If XInput2 is not supported, this will return null (with count of -1) so
-  // we assume there cannot be any touch devices.
-  int count = 0;
-  touch_device_lookup_.reset();
-  touch_device_list_.clear();
-#if !defined(USE_XI2_MT)
-  XDeviceInfo* devlist = XListInputDevices(display, &count);
-  for (int i = 0; i < count; i++) {
-    if (devlist[i].type) {
-      const char* devtype = XGetAtomName(display, devlist[i].type);
-      if (devtype && !strcmp(devtype, XI_TOUCHSCREEN)) {
-        touch_device_lookup_[devlist[i].id] = true;
-        touch_device_list_.push_back(devlist[i].id);
-      }
-    }
-  }
-  if (devlist)
-    XFreeDeviceList(devlist);
-#endif
-
-  // Instead of asking X for the list of devices all the time, let's maintain a
-  // list of pointer devices we care about.
-  // It should not be necessary to select for slave devices. XInput2 provides
-  // enough information to the event callback to decide which slave device
-  // triggered the event, thus decide whether the 'pointer event' is a
-  // 'mouse event' or a 'touch event'.
-  // However, on some desktops, some events from a master pointer are
-  // not delivered to the client. So we select for slave devices instead.
-  // If the touch device has 'GrabDevice' set and 'SendCoreEvents' unset (which
-  // is possible), then the device is detected as a floating device, and a
-  // floating device is not connected to a master device. So it is necessary to
-  // also select on the floating devices.
-  pointer_device_lookup_.reset();
-  XIDeviceInfo* devices = XIQueryDevice(display, XIAllDevices, &count);
-  for (int i = 0; i < count; i++) {
-    XIDeviceInfo* devinfo = devices + i;
-#if defined(USE_XI2_MT)
-    for (int k = 0; k < devinfo->num_classes; ++k) {
-      XIAnyClassInfo* xiclassinfo = devinfo->classes[k];
-      if (xiclassinfo->type == XITouchClass) {
-        XITouchClassInfo* tci =
-            reinterpret_cast<XITouchClassInfo *>(xiclassinfo);
-        // Only care direct touch device (such as touch screen) right now
-        if (tci->mode == XIDirectTouch) {
-          touch_device_lookup_[devinfo->deviceid] = true;
-          touch_device_list_.push_back(devinfo->deviceid);
-        }
-      }
-    }
-#endif
-    if (devinfo->use == XIFloatingSlave || devinfo->use == XISlavePointer)
-      pointer_device_lookup_[devinfo->deviceid] = true;
-  }
-  if (devices)
-    XIFreeDeviceInfo(devices);
-
-  SetupValuator();
-}
-
-bool TouchFactory::ShouldProcessXI2Event(XEvent* xev) {
-  DCHECK_EQ(GenericEvent, xev->type);
-  XIEvent* event = static_cast<XIEvent*>(xev->xcookie.data);
-  XIDeviceEvent* xiev = reinterpret_cast<XIDeviceEvent*>(event);
-
-#if defined(USE_XI2_MT)
-  if (event->evtype == XI_TouchBegin ||
-      event->evtype == XI_TouchUpdate ||
-      event->evtype == XI_TouchEnd) {
-    return touch_device_lookup_[xiev->sourceid];
-  }
-#endif
-  if (event->evtype != XI_ButtonPress &&
-      event->evtype != XI_ButtonRelease &&
-      event->evtype != XI_Motion)
-    return true;
-
-  return pointer_device_lookup_[xiev->deviceid];
-}
-
-void TouchFactory::SetupXI2ForXWindow(Window window) {
-  // Setup mask for mouse events. It is possible that a device is loaded/plugged
-  // in after we have setup XInput2 on a window. In such cases, we need to
-  // either resetup XInput2 for the window, so that we get events from the new
-  // device, or we need to listen to events from all devices, and then filter
-  // the events from uninteresting devices. We do the latter because that's
-  // simpler.
-
-  Display* display = ui::GetXDisplay();
-
-  unsigned char mask[XIMaskLen(XI_LASTEVENT)];
-  memset(mask, 0, sizeof(mask));
-
-#if defined(USE_XI2_MT)
-  XISetMask(mask, XI_TouchBegin);
-  XISetMask(mask, XI_TouchUpdate);
-  XISetMask(mask, XI_TouchEnd);
-#endif
-  XISetMask(mask, XI_ButtonPress);
-  XISetMask(mask, XI_ButtonRelease);
-  XISetMask(mask, XI_Motion);
-
-  XIEventMask evmask;
-  evmask.deviceid = XIAllDevices;
-  evmask.mask_len = sizeof(mask);
-  evmask.mask = mask;
-  XISelectEvents(display, window, &evmask, 1);
-  XFlush(display);
-}
-
-void TouchFactory::SetTouchDeviceList(
-    const std::vector<unsigned int>& devices) {
-  touch_device_lookup_.reset();
-  touch_device_list_.clear();
-  for (std::vector<unsigned int>::const_iterator iter = devices.begin();
-       iter != devices.end(); ++iter) {
-    DCHECK(*iter < touch_device_lookup_.size());
-    touch_device_lookup_[*iter] = true;
-    touch_device_list_.push_back(*iter);
-  }
-
-  SetupValuator();
-}
-
-bool TouchFactory::IsTouchDevice(unsigned deviceid) const {
-  return deviceid < touch_device_lookup_.size() ?
-      touch_device_lookup_[deviceid] : false;
-}
-
-#if !defined(USE_XI2_MT)
-bool TouchFactory::IsSlotUsed(int slot) const {
-  CHECK_LT(slot, kMaxTouchPoints);
-  return slots_used_[slot];
-}
-
-void TouchFactory::SetSlotUsed(int slot, bool used) {
-  CHECK_LT(slot, kMaxTouchPoints);
-  slots_used_[slot] = used;
-}
-#endif
-
-bool TouchFactory::GrabTouchDevices(Display* display, ::Window window) {
-#if defined(TOUCH_UI)
-  if (!base::MessagePumpForUI::HasXInput2() ||
-      touch_device_list_.empty())
-    return true;
-#endif
-
-  unsigned char mask[XIMaskLen(XI_LASTEVENT)];
-  bool success = true;
-
-  memset(mask, 0, sizeof(mask));
-#if defined(USE_XI2_MT)
-  XISetMask(mask, XI_TouchBegin);
-  XISetMask(mask, XI_TouchUpdate);
-  XISetMask(mask, XI_TouchEnd);
-#endif
-  XISetMask(mask, XI_ButtonPress);
-  XISetMask(mask, XI_ButtonRelease);
-  XISetMask(mask, XI_Motion);
-
-  XIEventMask evmask;
-  evmask.mask_len = sizeof(mask);
-  evmask.mask = mask;
-  for (std::vector<int>::const_iterator iter =
-       touch_device_list_.begin();
-       iter != touch_device_list_.end(); ++iter) {
-    evmask.deviceid = *iter;
-    Status status = XIGrabDevice(display, *iter, window, CurrentTime, None,
-                                 GrabModeAsync, GrabModeAsync, False, &evmask);
-    success = success && status == GrabSuccess;
-  }
-
-  return success;
-}
-
-bool TouchFactory::UngrabTouchDevices(Display* display) {
-#if defined(TOUCH_UI)
-  if (!base::MessagePumpForUI::HasXInput2())
-    return true;
-#endif
-
-  bool success = true;
-  for (std::vector<int>::const_iterator iter =
-       touch_device_list_.begin();
-       iter != touch_device_list_.end(); ++iter) {
-    Status status = XIUngrabDevice(display, *iter, CurrentTime);
-    success = success && status == GrabSuccess;
-  }
-  return success;
-}
-
-void TouchFactory::SetCursorVisible(bool show, bool start_timer) {
-#if defined(TOUCH_UI)
-  if (!base::MessagePumpForUI::HasXInput2())
-    return;
-#endif
-
-  // The cursor is going to be shown. Reset the timer for hiding it.
-  if (show && start_timer) {
-    cursor_timer_.Stop();
-    cursor_timer_.Start(
-        FROM_HERE, base::TimeDelta::FromSeconds(kCursorIdleSeconds),
-        this, &TouchFactory::HideCursorForInactivity);
-  } else {
-    cursor_timer_.Stop();
-  }
-
-  if (show == is_cursor_visible_)
-    return;
-
-  is_cursor_visible_ = show;
-
-  Display* display = ui::GetXDisplay();
-  Window window = DefaultRootWindow(display);
-
-  if (is_cursor_visible_) {
-    XDefineCursor(display, window, arrow_cursor_);
-  } else {
-    XDefineCursor(display, window, invisible_cursor_);
-  }
-}
-
-void TouchFactory::SetupValuator() {
-  memset(valuator_lookup_, -1, sizeof(valuator_lookup_));
-  memset(touch_param_min_, 0, sizeof(touch_param_min_));
-  memset(touch_param_max_, 0, sizeof(touch_param_max_));
-
-  Display* display = ui::GetXDisplay();
-  int ndevice;
-  XIDeviceInfo* info_list = XIQueryDevice(display, XIAllDevices, &ndevice);
-
-  for (int i = 0; i < ndevice; i++) {
-    XIDeviceInfo* info = info_list + i;
-
-    if (!IsTouchDevice(info->deviceid))
-      continue;
-
-    for (int j = 0; j < TP_LAST_ENTRY; j++) {
-      TouchParam tp = static_cast<TouchParam>(j);
-      XIValuatorClassInfo* valuator = FindTPValuator(display, info, tp);
-      if (valuator) {
-        valuator_lookup_[info->deviceid][j] = valuator->number;
-        touch_param_min_[info->deviceid][j] = valuator->min;
-        touch_param_max_[info->deviceid][j] = valuator->max;
-      }
-    }
-  }
-
-  if (info_list)
-    XIFreeDeviceInfo(info_list);
-}
-
-bool TouchFactory::ExtractTouchParam(const XEvent& xev,
-                                     TouchParam tp,
-                                     float* value) {
-  XIDeviceEvent* xiev = static_cast<XIDeviceEvent*>(xev.xcookie.data);
-  if (xiev->sourceid >= kMaxDeviceNum)
-    return false;
-  int v = valuator_lookup_[xiev->sourceid][tp];
-  if (v >= 0 && XIMaskIsSet(xiev->valuators.mask, v)) {
-    *value = xiev->valuators.values[v];
-    return true;
-  }
-
-#if defined(USE_XI2_MT)
-  // With XInput2 MT, Tracking ID is provided in the detail field.
-  if (tp == TP_TRACKING_ID) {
-    *value = xiev->detail;
-    return true;
-  }
-#endif
-
-  return false;
-}
-
-bool TouchFactory::NormalizeTouchParam(unsigned int deviceid,
-                                       TouchParam tp,
-                                       float* value) {
-  float max_value;
-  float min_value;
-  if (GetTouchParamRange(deviceid, tp, &min_value, &max_value)) {
-    *value = (*value - min_value) / (max_value - min_value);
-    DCHECK(*value >= 0.0 && *value <= 1.0);
-    return true;
-  }
-  return false;
-}
-
-bool TouchFactory::GetTouchParamRange(unsigned int deviceid,
-                                      TouchParam tp,
-                                      float* min,
-                                      float* max) {
-  if (valuator_lookup_[deviceid][tp] >= 0) {
-    *min = touch_param_min_[deviceid][tp];
-    *max = touch_param_max_[deviceid][tp];
-    return true;
-  }
-  return false;
-}
-
-}  // namespace views