Move evdev events support into EventFactoryDelegateEvdev

ui/events/ozone/evdev/touch_event_converter_ozone.cc

-// Copyright (c) 2013 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/events/ozone/evdev/touch_event_converter_ozone.h"
-
-#include <fcntl.h>
-#include <linux/input.h>
-#include <poll.h>
-#include <stdio.h>
-#include <unistd.h>
-
-#include <cmath>
-#include <limits>
-
-#include "base/bind.h"
-#include "base/callback.h"
-#include "base/logging.h"
-#include "base/message_loop/message_loop.h"
-#include "base/message_loop/message_pump_ozone.h"
-#include "ui/events/event.h"
-#include "ui/events/event_constants.h"
-#include "ui/gfx/ozone/surface_factory_ozone.h"
-
-namespace {
-
-// Number is determined empirically.
-// TODO(rjkroege): Configure this per device.
-const float kFingerWidth = 25.f;
-
-}  // namespace
-
-namespace ui {
-
-TouchEventConverterOzone::TouchEventConverterOzone(int fd, int id)
-    : pressure_min_(0),
-      pressure_max_(0),
-      x_scale_(1.),
-      y_scale_(1.),
-      x_max_(std::numeric_limits<int>::max()),
-      y_max_(std::numeric_limits<int>::max()),
-      current_slot_(0),
-      fd_(fd),
-      id_(id) {
-  Init();
-}
-
-TouchEventConverterOzone::~TouchEventConverterOzone() {
-  if (close(fd_) < 0)
-    DLOG(WARNING) << "failed close on /dev/input/event" << id_;
-}
-
-void TouchEventConverterOzone::Init() {
-  input_absinfo abs = {};
-  if (ioctl(fd_, EVIOCGABS(ABS_MT_SLOT), &abs) != -1) {
-    CHECK_GE(abs.maximum, abs.minimum);
-    CHECK_GE(abs.minimum, 0);
-  } else {
-    DLOG(WARNING) << "failed ioctl EVIOCGABS ABS_MT_SLOT event" << id_;
-  }
-  if (ioctl(fd_, EVIOCGABS(ABS_MT_PRESSURE), &abs) != -1) {
-    pressure_min_ = abs.minimum;
-    pressure_max_ = abs.maximum;
-  } else {
-    DLOG(WARNING) << "failed ioctl EVIOCGABS ABS_MT_PRESSURE event" << id_;
-  }
-  int x_min = 0, x_max = 0;
-  if (ioctl(fd_, EVIOCGABS(ABS_MT_POSITION_X), &abs) != -1) {
-    x_min = abs.minimum;
-    x_max = abs.maximum;
-  } else {
-    LOG(WARNING) << "failed ioctl EVIOCGABS ABS_X event" << id_;
-  }
-  int y_min = 0, y_max = 0;
-  if (ioctl(fd_, EVIOCGABS(ABS_MT_POSITION_Y), &abs) != -1) {
-    y_min = abs.minimum;
-    y_max = abs.maximum;
-  } else {
-    LOG(WARNING) << "failed ioctl EVIOCGABS ABS_Y event" << id_;
-  }
-  if (x_max && y_max && gfx::SurfaceFactoryOzone::GetInstance()) {
-    const char* display =
-        gfx::SurfaceFactoryOzone::GetInstance()->DefaultDisplaySpec();
-    int screen_width, screen_height;
-    int sc = sscanf(display, "%dx%d", &screen_width, &screen_height);
-    if (sc == 2) {
-      x_scale_ = (double)screen_width / (x_max - x_min);
-      y_scale_ = (double)screen_height / (y_max - y_min);
-      x_max_ = screen_width - 1;
-      y_max_ = screen_height - 1;
-      LOG(INFO) << "touch input x_scale=" << x_scale_
-                << " y_scale=" << y_scale_;
-    } else {
-      LOG(WARNING) << "malformed display spec from "
-                   << "SurfaceFactoryOzone::DefaultDisplaySpec";
-    }
-  }
-}
-
-void TouchEventConverterOzone::OnFileCanWriteWithoutBlocking(int /* fd */) {
-  // Read-only file-descriptors.
-  NOTREACHED();
-}
-
-void TouchEventConverterOzone::OnFileCanReadWithoutBlocking(int fd) {
-  input_event inputs[MAX_FINGERS * 6 + 1];
-  ssize_t read_size = read(fd, inputs, sizeof(inputs));
-  if (read_size <= 0)
-    return;
-
-  for (unsigned i = 0; i < read_size / sizeof(*inputs); i++) {
-    const input_event& input = inputs[i];
-    if (input.type == EV_ABS) {
-      switch (input.code) {
-        case ABS_MT_TOUCH_MAJOR:
-          altered_slots_.set(current_slot_);
-          events_[current_slot_].major_ = input.value;
-          break;
-        case ABS_X:
-        case ABS_MT_POSITION_X:
-          altered_slots_.set(current_slot_);
-          events_[current_slot_].x_ = roundf(input.value * x_scale_);
-          break;
-        case ABS_Y:
-        case ABS_MT_POSITION_Y:
-          altered_slots_.set(current_slot_);
-          events_[current_slot_].y_ = roundf(input.value * y_scale_);
-          break;
-        case ABS_MT_TRACKING_ID:
-          altered_slots_.set(current_slot_);
-          if (input.value < 0) {
-            events_[current_slot_].type_ = ET_TOUCH_RELEASED;
-          } else {
-            events_[current_slot_].finger_ = input.value;
-            events_[current_slot_].type_ = ET_TOUCH_PRESSED;
-          }
-          break;
-        case ABS_MT_PRESSURE:
-        case ABS_PRESSURE:
-          altered_slots_.set(current_slot_);
-          events_[current_slot_].pressure_ = input.value - pressure_min_;
-          events_[current_slot_].pressure_ /= pressure_max_ - pressure_min_;
-          break;
-        case ABS_MT_SLOT:
-          current_slot_ = input.value;
-          altered_slots_.set(current_slot_);
-          break;
-        default:
-          NOTREACHED();
-      }
-    } else if (input.type == EV_SYN) {
-      switch (input.code) {
-        case SYN_REPORT:
-          for (int j = 0; j < MAX_FINGERS; j++) {
-            if (altered_slots_[j]) {
-              // TODO(rjkroege): Support elliptical finger regions.
-              scoped_ptr<TouchEvent> tev(new TouchEvent(
-                  events_[j].type_,
-                  gfx::Point(std::min(x_max_, events_[j].x_),
-                             std::min(y_max_, events_[j].y_)),
-                  /* flags */ 0,
-                  /* touch_id */ j,
-                  base::TimeDelta::FromMicroseconds(
-                      input.time.tv_sec * 1000000 + input.time.tv_usec),
-                  events_[j].pressure_ * kFingerWidth,
-                  events_[j].pressure_ * kFingerWidth,
-                  /* angle */ 0.,
-                  events_[j].pressure_));
-              DispatchEvent(tev.PassAs<ui::Event>());
-
-              // Subsequent events for this finger will be touch-move until it
-              // is released.
-              events_[j].type_ = ET_TOUCH_MOVED;
-            }
-          }
-          altered_slots_.reset();
-          break;
-        case SYN_MT_REPORT:
-        case SYN_CONFIG:
-        case SYN_DROPPED:
-          NOTREACHED() << "SYN_MT events not supported.";
-          break;
-      }
-    } else {
-      NOTREACHED();
-    }
-  }
-}
-
-}  // namespace ui