Revert "Merge CMTEventData and ValuatorTracker"

ui/base/x/valuators.cc

+// Copyright (c) 2012 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 "ui/base/x/valuators.h"
+
+#include <X11/extensions/XInput2.h>
+
+#include "base/memory/singleton.h"
+#include "ui/base/touch/touch_factory_x11.h"
+#include "ui/base/x/device_list_cache_x.h"
+#include "ui/base/x/x11_util.h"
+
+namespace {
+
+#define AXIS_LABEL_ABS_MT_TOUCH_MAJOR "Abs MT Touch Major"
+#define AXIS_LABEL_ABS_MT_TOUCH_MINOR "Abs MT Touch Minor"
+#define AXIS_LABEL_ABS_MT_ORIENTATION "Abs MT Orientation"
+#define AXIS_LABEL_ABS_MT_PRESSURE    "Abs MT Pressure"
+#define AXIS_LABEL_ABS_MT_SLOT_ID     "Abs MT Slot ID"
+#define AXIS_LABEL_ABS_MT_TRACKING_ID "Abs MT Tracking ID"
+#define AXIS_LABEL_TOUCH_TIMESTAMP    "Touch Timestamp"
+
+// Given the Valuator, return the correspoding XIValuatorClassInfo using
+// the X device information through Atom name matching.
+XIValuatorClassInfo* FindValuator(Display* display,
+                                  XIDeviceInfo* info,
+                                  ui::ValuatorTracker::Valuator val) {
+  // Lookup table for mapping Valuator to Atom string used in X.
+  // A full set of Atom strings can be found at xserver-properties.h.
+  static struct {
+    ui::ValuatorTracker::Valuator val;
+    Atom atom;
+  } kValuatorAtom[] = {
+    { ui::ValuatorTracker::VAL_TOUCH_MAJOR,
+      XInternAtom(ui::GetXDisplay(), AXIS_LABEL_ABS_MT_TOUCH_MAJOR, false) },
+    { ui::ValuatorTracker::VAL_TOUCH_MINOR,
+      XInternAtom(ui::GetXDisplay(), AXIS_LABEL_ABS_MT_TOUCH_MINOR, false) },
+    { ui::ValuatorTracker::VAL_ORIENTATION,
+      XInternAtom(ui::GetXDisplay(), AXIS_LABEL_ABS_MT_ORIENTATION, false) },
+    { ui::ValuatorTracker::VAL_PRESSURE,
+      XInternAtom(ui::GetXDisplay(), AXIS_LABEL_ABS_MT_PRESSURE, false) },
+#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
+    { ui::ValuatorTracker::VAL_SLOT_ID,
+      XInternAtom(ui::GetXDisplay(), AXIS_LABEL_ABS_MT_SLOT_ID, false) },
+#endif
+    { ui::ValuatorTracker::VAL_TRACKING_ID,
+      XInternAtom(ui::GetXDisplay(), AXIS_LABEL_ABS_MT_TRACKING_ID, false) },
+    { ui::ValuatorTracker::VAL_TOUCH_RAW_TIMESTAMP,
+      XInternAtom(ui::GetXDisplay(), AXIS_LABEL_TOUCH_TIMESTAMP, false) },
+    { ui::ValuatorTracker::VAL_LAST_ENTRY, None },
+  };
+
+  Atom atom = None;
+
+  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(kValuatorAtom); i++) {
+    if (val == kValuatorAtom[i].val) {
+      atom = kValuatorAtom[i].atom;
+      break;
+    }
+  }
+
+  if (atom == None)
+    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]);
+    if (v->label && atom == v->label)
+      return v;
+  }
+
+  return NULL;
+}
+
+}  // namespace
+
+namespace ui {
+
+ValuatorTracker::ValuatorTracker() {
+  SetupValuator();
+}
+
+ValuatorTracker::~ValuatorTracker() {
+}
+
+// static
+ValuatorTracker* ValuatorTracker::GetInstance() {
+  return Singleton<ValuatorTracker>::get();
+}
+
+bool ValuatorTracker::ExtractValuator(const XEvent& xev,
+                                      Valuator val,
+                                      double* value) {
+  XIDeviceEvent* xiev = static_cast<XIDeviceEvent*>(xev.xcookie.data);
+  if (xiev->sourceid >= kMaxDeviceNum || xiev->deviceid >= kMaxDeviceNum)
+    return false;
+  int val_index = valuator_lookup_[xiev->sourceid][val];
+  if (val_index >= 0) {
+    if (XIMaskIsSet(xiev->valuators.mask, val_index)) {
+      double* valuators = xiev->valuators.values;
+      while (val_index--) {
+        if (XIMaskIsSet(xiev->valuators.mask, val_index))
+          ++valuators;
+      }
+      *value = *valuators;
+      last_seen_valuator_[xiev->deviceid][val] = *value;
+      return true;
+    } else {
+      *value = last_seen_valuator_[xiev->deviceid][val];
+    }
+  }
+
+#if defined(USE_XI2_MT)
+  // With XInput2 MT, Tracking ID is provided in the detail field.
+  if (val == VAL_TRACKING_ID) {
+    *value = xiev->detail;
+    return true;
+  }
+#endif
+
+  return false;
+}
+
+bool ValuatorTracker::NormalizeValuator(unsigned int deviceid,
+                                        Valuator val,
+                                        double* value) {
+  double max_value;
+  double min_value;
+  if (GetValuatorRange(deviceid, val, &min_value, &max_value)) {
+    *value = (*value - min_value) / (max_value - min_value);
+    DCHECK(*value >= 0.0 && *value <= 1.0);
+    return true;
+  }
+  return false;
+}
+
+bool ValuatorTracker::GetValuatorRange(unsigned int deviceid,
+                                       Valuator val,
+                                       double* min,
+                                       double* max) {
+  if (valuator_lookup_[deviceid][val] >= 0) {
+    *min = valuator_min_[deviceid][val];
+    *max = valuator_max_[deviceid][val];
+    return true;
+  }
+  return false;
+}
+
+void ValuatorTracker::SetupValuator() {
+  memset(valuator_lookup_, -1, sizeof(valuator_lookup_));
+  memset(valuator_min_, 0, sizeof(valuator_min_));
+  memset(valuator_max_, 0, sizeof(valuator_max_));
+  memset(last_seen_valuator_, 0, sizeof(last_seen_valuator_));
+
+  Display* display = GetXDisplay();
+  XIDeviceList info_list =
+      DeviceListCacheX::GetInstance()->GetXI2DeviceList(display);
+  TouchFactory* factory = TouchFactory::GetInstance();
+
+  for (int i = 0; i < info_list.count; i++) {
+    XIDeviceInfo* info = info_list.devices + i;
+
+    if (!factory->IsTouchDevice(info->deviceid))
+      continue;
+
+    for (int j = 0; j < VAL_LAST_ENTRY; j++) {
+      Valuator val = static_cast<Valuator>(j);
+      XIValuatorClassInfo* valuator = FindValuator(display, info, val);
+      if (valuator) {
+        valuator_lookup_[info->deviceid][j] = valuator->number;
+        valuator_min_[info->deviceid][j] = valuator->min;
+        valuator_max_[info->deviceid][j] = valuator->max;
+      }
+    }
+  }
+}
+
+}  // namespace ui