ozone: Interpret absolute events for graphics tablets

ui/events/ozone/evdev/tablet_event_converter_evdev_unittest.cc

+// Copyright 2014 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 <errno.h>
+#include <fcntl.h>
+#include <linux/input.h>
+#include <unistd.h>
+
+#include <vector>
+
+#include "base/bind.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/scoped_vector.h"
+#include "base/posix/eintr_wrapper.h"
+#include "base/run_loop.h"
+#include "base/time/time.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/events/event.h"
+#include "ui/events/ozone/evdev/tablet_event_converter_evdev.h"
+#include "ui/events/platform/platform_event_dispatcher.h"
+#include "ui/events/platform/platform_event_source.h"
+
+namespace {
+
+static int SetNonBlocking(int fd) {
+  int flags = fcntl(fd, F_GETFL, 0);
+  if (flags == -1)
+    flags = 0;
+  return fcntl(fd, F_SETFL, flags | O_NONBLOCK);
+}
+
+const char kTestDevicePath[] = "/dev/input/test-device";
+
+}  // namespace
+
+namespace ui {
+
+class MockTabletEventConverterEvdev : public TabletEventConverterEvdev {
+ public:
+  MockTabletEventConverterEvdev(int fd,
+                                base::FilePath path,
+                                EventModifiersEvdev* modifiers,
+                                CursorDelegateEvdev* cursor);
+  virtual ~MockTabletEventConverterEvdev(){};
+
+  void ConfigureReadMock(struct input_event* queue,
+                         long read_this_many,
+                         long queue_index);
+
+  unsigned size() { return dispatched_events_.size(); }
+  MouseEvent* event(unsigned index) {
+    DCHECK_GT(dispatched_events_.size(), index);
+    Event* ev = dispatched_events_[index];
+    DCHECK(ev->IsMouseEvent());
+    return static_cast<MouseEvent*>(ev);
+  }
+
+  // Actually dispatch the event reader code.
+  void ReadNow() {
+    OnFileCanReadWithoutBlocking(read_pipe_);
+    base::RunLoop().RunUntilIdle();
+  }
+
+  void DispatchCallback(scoped_ptr<Event> event) {
+    dispatched_events_.push_back(event.release());
+  }
+
+ private:
+  int read_pipe_;
+  int write_pipe_;
+
+  ScopedVector<Event> dispatched_events_;
+
+  DISALLOW_COPY_AND_ASSIGN(MockTabletEventConverterEvdev);
+};
+
+class MockTabletCursorEvdev : public CursorDelegateEvdev {
+ public:
+  MockTabletCursorEvdev() { cursor_display_bounds_ = gfx::Rect(1024, 768); }
+  virtual ~MockTabletCursorEvdev() {}
+
+  // CursorDelegateEvdev:
+  void MoveCursorTo(gfx::AcceleratedWidget widget,
+                    const gfx::PointF& location) override {
+    NOTREACHED();
+  }
+  void MoveCursorTo(const gfx::PointF& location) override {
+    cursor_location_ = location;
+  }
+  void MoveCursor(const gfx::Vector2dF& delta) override { NOTREACHED(); }
+  bool IsCursorVisible() override { return 1; }
+  gfx::PointF location() override { return cursor_location_; }
+  gfx::Rect GetCursorDisplayBounds() override { return cursor_display_bounds_; }
+
+ private:
+  gfx::PointF cursor_location_;
+  gfx::Rect cursor_display_bounds_;
+  DISALLOW_COPY_AND_ASSIGN(MockTabletCursorEvdev);
+};
+
+MockTabletEventConverterEvdev::MockTabletEventConverterEvdev(
+    int fd,
+    base::FilePath path,
+    EventModifiersEvdev* modifiers,
+    CursorDelegateEvdev* cursor)
+    : TabletEventConverterEvdev(
+          fd,
+          path,
+          1,
+          modifiers,
+          cursor,
+          EventDeviceInfo(),
+          base::Bind(&MockTabletEventConverterEvdev::DispatchCallback,
+                     base::Unretained(this))) {
+  // Real values taken from Wacom Intuos 4
+  x_abs_min_ = 0;
+  x_abs_range_ = 65024;
+  y_abs_min_ = 0;
+  y_abs_range_ = 40640;
+
+  int fds[2];
+
+  if (pipe(fds))
+    PLOG(FATAL) << "failed pipe";
+
+  DCHECK(SetNonBlocking(fds[0]) == 0)
+      << "SetNonBlocking for pipe fd[0] failed, errno: " << errno;
+  DCHECK(SetNonBlocking(fds[1]) == 0)
+      << "SetNonBlocking for pipe fd[0] failed, errno: " << errno;
+  read_pipe_ = fds[0];
+  write_pipe_ = fds[1];
+}
+
+void MockTabletEventConverterEvdev::ConfigureReadMock(struct input_event* queue,
+                                                      long read_this_many,
+                                                      long queue_index) {
+  int nwrite = HANDLE_EINTR(write(write_pipe_, queue + queue_index,
+                                  sizeof(struct input_event) * read_this_many));
+  DCHECK(nwrite ==
+         static_cast<int>(sizeof(struct input_event) * read_this_many))
+      << "write() failed, errno: " << errno;
+}
+
+}  // namespace ui
+
+// Test fixture.
+class TabletEventConverterEvdevTest : public testing::Test {
+ public:
+  TabletEventConverterEvdevTest() {}
+
+  // Overridden from testing::Test:
+  virtual void SetUp() override {
+    // Set up pipe to satisfy message pump (unused).
+    int evdev_io[2];
+    if (pipe(evdev_io))
+      PLOG(FATAL) << "failed pipe";
+    events_in_ = evdev_io[0];
+    events_out_ = evdev_io[1];
+
+    cursor_.reset(new ui::MockTabletCursorEvdev());
+    modifiers_.reset(new ui::EventModifiersEvdev());
+    device_.reset(new ui::MockTabletEventConverterEvdev(
+        events_in_, base::FilePath(kTestDevicePath), modifiers_.get(),
+        cursor_.get()));
+  }
+
+  virtual void TearDown() override {
+    modifiers_.reset();
+    cursor_.reset();
+    device_.reset();
+  }
+
+  ui::MockTabletEventConverterEvdev* device() { return device_.get(); }
+  ui::CursorDelegateEvdev* cursor() { return cursor_.get(); }
+  ui::EventModifiersEvdev* modifiers() { return modifiers_.get(); }
+
+ private:
+  scoped_ptr<ui::MockTabletEventConverterEvdev> device_;
+  scoped_ptr<ui::MockTabletCursorEvdev> cursor_;
+  scoped_ptr<ui::EventModifiersEvdev> modifiers_;
+
+  int events_out_;
+  int events_in_;
+
+  DISALLOW_COPY_AND_ASSIGN(TabletEventConverterEvdevTest);
+};
+
+#define EPSILON 20
+
+// Uses real data captured from Wacom Intuos 4
+TEST_F(TabletEventConverterEvdevTest, MoveTopLeft) {
+  ui::MockTabletEventConverterEvdev* dev = device();
+
+  struct input_event mock_kernel_queue[] = {
+      {{0, 0}, EV_ABS, ABS_Y, 616},
+      {{0, 0}, EV_ABS, ABS_DISTANCE, 62},
+      {{0, 0}, EV_ABS, ABS_TILT_X, 50},
+      {{0, 0}, EV_ABS, ABS_TILT_Y, 7},
+      {{0, 0}, EV_ABS, ABS_MISC, 1050626},
+      {{0, 0}, EV_KEY, BTN_TOOL_PEN, 1},
+      {{0, 0}, EV_MSC, MSC_SERIAL, 159403517},
+      {{0, 0}, EV_SYN, SYN_REPORT, 0},
+      {{0, 0}, EV_ABS, ABS_Y, 0},
+      {{0, 0}, EV_ABS, ABS_DISTANCE, 0},
+      {{0, 0}, EV_ABS, ABS_TILT_X, 0},
+      {{0, 0}, EV_KEY, BTN_TOOL_PEN, 0},
+      {{0, 0}, EV_ABS, ABS_MISC, 0},
+      {{0, 0}, EV_MSC, MSC_SERIAL, 159403517},
+      {{0, 0}, EV_SYN, SYN_REPORT, 0},
+  };
+
+  dev->ProcessEvents(mock_kernel_queue, arraysize(mock_kernel_queue));
+  EXPECT_EQ(1u, dev->size());
+
+  ui::MouseEvent* event = dev->event(0);
+  EXPECT_EQ(ui::ET_MOUSE_MOVED, event->type());
+
+  EXPECT_LT(cursor()->location().x(), EPSILON);
+  EXPECT_LT(cursor()->location().y(), EPSILON);
+}
+
+TEST_F(TabletEventConverterEvdevTest, MoveTopRight) {
+  ui::MockTabletEventConverterEvdev* dev = device();
+
+  struct input_event mock_kernel_queue[] = {
+      {{0, 0}, EV_ABS, ABS_X, 65024},
+      {{0, 0}, EV_ABS, ABS_Y, 33},
+      {{0, 0}, EV_ABS, ABS_DISTANCE, 62},
+      {{0, 0}, EV_ABS, ABS_TILT_X, 109},
+      {{0, 0}, EV_ABS, ABS_TILT_Y, 59},
+      {{0, 0}, EV_ABS, ABS_MISC, 1050626},
+      {{0, 0}, EV_KEY, BTN_TOOL_PEN, 1},
+      {{0, 0}, EV_MSC, MSC_SERIAL, 159403517},
+      {{0, 0}, EV_SYN, SYN_REPORT, 0},
+      {{0, 0}, EV_ABS, ABS_X, 0},
+      {{0, 0}, EV_ABS, ABS_DISTANCE, 0},
+      {{0, 0}, EV_ABS, ABS_TILT_X, 0},
+      {{0, 0}, EV_ABS, ABS_TILT_Y, 0},
+      {{0, 0}, EV_KEY, BTN_TOOL_PEN, 0},
+      {{0, 0}, EV_ABS, ABS_MISC, 0},
+      {{0, 0}, EV_MSC, MSC_SERIAL, 159403517},
+      {{0, 0}, EV_SYN, SYN_REPORT, 0},
+  };
+
+  dev->ProcessEvents(mock_kernel_queue, arraysize(mock_kernel_queue));
+  EXPECT_EQ(1u, dev->size());
+
+  ui::MouseEvent* event = dev->event(0);
+  EXPECT_EQ(ui::ET_MOUSE_MOVED, event->type());
+
+  EXPECT_GT(cursor()->location().x(),
+            cursor()->GetCursorDisplayBounds().width() - EPSILON);
+  EXPECT_LT(cursor()->location().y(), EPSILON);
+}
+
+TEST_F(TabletEventConverterEvdevTest, MoveBottomLeft) {
+  ui::MockTabletEventConverterEvdev* dev = device();
+
+  struct input_event mock_kernel_queue[] = {
+      {{0, 0}, EV_ABS, ABS_Y, 40640},
+      {{0, 0}, EV_ABS, ABS_DISTANCE, 62},
+      {{0, 0}, EV_ABS, ABS_TILT_X, 95},
+      {{0, 0}, EV_ABS, ABS_TILT_Y, 44},
+      {{0, 0}, EV_ABS, ABS_MISC, 1050626},
+      {{0, 0}, EV_KEY, BTN_TOOL_PEN, 1},
+      {{0, 0}, EV_MSC, MSC_SERIAL, 159403517},
+      {{0, 0}, EV_SYN, SYN_REPORT, 0},
+      {{0, 0}, EV_ABS, ABS_Y, 0},
+      {{0, 0}, EV_ABS, ABS_DISTANCE, 0},
+      {{0, 0}, EV_ABS, ABS_TILT_X, 0},
+      {{0, 0}, EV_ABS, ABS_TILT_Y, 0},
+      {{0, 0}, EV_KEY, BTN_TOOL_PEN, 0},
+      {{0, 0}, EV_ABS, ABS_MISC, 0},
+      {{0, 0}, EV_MSC, MSC_SERIAL, 159403517},
+      {{0, 0}, EV_SYN, SYN_REPORT, 0},
+  };
+
+  dev->ProcessEvents(mock_kernel_queue, arraysize(mock_kernel_queue));
+  EXPECT_EQ(1u, dev->size());
+
+  ui::MouseEvent* event = dev->event(0);
+  EXPECT_EQ(ui::ET_MOUSE_MOVED, event->type());
+
+  EXPECT_LT(cursor()->location().x(), EPSILON);
+  EXPECT_GT(cursor()->location().y(),
+            cursor()->GetCursorDisplayBounds().height() - EPSILON);
+}
+
+TEST_F(TabletEventConverterEvdevTest, MoveBottomRight) {
+  ui::MockTabletEventConverterEvdev* dev = device();
+
+  struct input_event mock_kernel_queue[] = {
+      {{0, 0}, EV_ABS, ABS_X, 65024},
+      {{0, 0}, EV_ABS, ABS_Y, 40640},
+      {{0, 0}, EV_ABS, ABS_DISTANCE, 62},
+      {{0, 0}, EV_ABS, ABS_TILT_X, 127},
+      {{0, 0}, EV_ABS, ABS_TILT_Y, 89},
+      {{0, 0}, EV_ABS, ABS_MISC, 1050626},
+      {{0, 0}, EV_KEY, BTN_TOOL_PEN, 1},
+      {{0, 0}, EV_MSC, MSC_SERIAL, 159403517},
+      {{0, 0}, EV_SYN, SYN_REPORT, 0},
+      {{0, 0}, EV_ABS, ABS_X, 0},
+      {{0, 0}, EV_ABS, ABS_Y, 0},
+      {{0, 0}, EV_ABS, ABS_DISTANCE, 0},
+      {{0, 0}, EV_ABS, ABS_TILT_X, 0},
+      {{0, 0}, EV_ABS, ABS_TILT_Y, 0},
+      {{0, 0}, EV_KEY, BTN_TOOL_PEN, 0},
+      {{0, 0}, EV_ABS, ABS_MISC, 0},
+      {{0, 0}, EV_MSC, MSC_SERIAL, 159403517},
+      {{0, 0}, EV_SYN, SYN_REPORT, 0},
+  };
+
+  dev->ProcessEvents(mock_kernel_queue, arraysize(mock_kernel_queue));
+  EXPECT_EQ(1u, dev->size());
+
+  ui::MouseEvent* event = dev->event(0);
+  EXPECT_EQ(ui::ET_MOUSE_MOVED, event->type());
+
+  EXPECT_GT(cursor()->location().x(),
+            cursor()->GetCursorDisplayBounds().height() - EPSILON);
+  EXPECT_GT(cursor()->location().y(),
+            cursor()->GetCursorDisplayBounds().height() - EPSILON);
+}
+
+TEST_F(TabletEventConverterEvdevTest, Tap) {
+  ui::MockTabletEventConverterEvdev* dev = device();
+
+  struct input_event mock_kernel_queue[] = {
+      {{0, 0}, EV_ABS, ABS_X, 31628},
+      {{0, 0}, EV_ABS, ABS_Y, 21670},
+      {{0, 0}, EV_ABS, ABS_DISTANCE, 62},
+      {{0, 0}, EV_ABS, ABS_TILT_X, 114},
+      {{0, 0}, EV_ABS, ABS_TILT_Y, 85},
+      {{0, 0}, EV_ABS, ABS_MISC, 1050626},
+      {{0, 0}, EV_KEY, BTN_TOOL_PEN, 1},
+      {{0, 0}, EV_MSC, MSC_SERIAL, 159403517},
+      {{0, 0}, EV_SYN, SYN_REPORT, 0},
+      {{0, 0}, EV_ABS, ABS_X, 32094},
+      {{0, 0}, EV_ABS, ABS_DISTANCE, 17},
+      {{0, 0}, EV_ABS, ABS_PRESSURE, 883},
+      {{0, 0}, EV_ABS, ABS_TILT_Y, 68},
+      {{0, 0}, EV_KEY, BTN_TOUCH, 1},
+      {{0, 0}, EV_MSC, MSC_SERIAL, 159403517},
+      {{0, 0}, EV_SYN, SYN_REPORT, 0},
+      {{0, 0}, EV_ABS, ABS_X, 32036},
+      {{0, 0}, EV_ABS, ABS_Y, 21658},
+      {{0, 0}, EV_ABS, ABS_DISTANCE, 19},
+      {{0, 0}, EV_ABS, ABS_PRESSURE, 0},
+      {{0, 0}, EV_KEY, BTN_TOUCH, 0},
+      {{0, 0}, EV_MSC, MSC_SERIAL, 159403517},
+      {{0, 0}, EV_SYN, SYN_REPORT, 0},
+      {{0, 0}, EV_ABS, ABS_X, 0},
+      {{0, 0}, EV_ABS, ABS_Y, 0},
+      {{0, 0}, EV_ABS, ABS_DISTANCE, 0},
+      {{0, 0}, EV_ABS, ABS_TILT_X, 0},
+      {{0, 0}, EV_ABS, ABS_TILT_Y, 0},
+      {{0, 0}, EV_KEY, BTN_TOOL_PEN, 0},
+      {{0, 0}, EV_ABS, ABS_MISC, 0},
+      {{0, 0}, EV_MSC, MSC_SERIAL, 159403517},
+      {{0, 0}, EV_SYN, SYN_REPORT, 0},
+  };
+
+  dev->ProcessEvents(mock_kernel_queue, arraysize(mock_kernel_queue));
+  EXPECT_EQ(3u, dev->size());
+
+  ui::MouseEvent* event = dev->event(0);
+  EXPECT_EQ(ui::ET_MOUSE_MOVED, event->type());
+  event = dev->event(1);
+  EXPECT_EQ(ui::ET_MOUSE_PRESSED, event->type());
+  EXPECT_EQ(true, event->IsLeftMouseButton());
+  event = dev->event(2);
+  EXPECT_EQ(ui::ET_MOUSE_RELEASED, event->type());
+  EXPECT_EQ(true, event->IsLeftMouseButton());
+}
+
+TEST_F(TabletEventConverterEvdevTest, StylusButtonPress) {
+  ui::MockTabletEventConverterEvdev* dev = device();
+
+  struct input_event mock_kernel_queue[] = {
+      {{0, 0}, EV_ABS, ABS_X, 30055},
+      {{0, 0}, EV_ABS, ABS_Y, 18094},
+      {{0, 0}, EV_ABS, ABS_DISTANCE, 62},
+      {{0, 0}, EV_ABS, ABS_TILT_X, 99},
+      {{0, 0}, EV_ABS, ABS_TILT_Y, 68},
+      {{0, 0}, EV_ABS, ABS_MISC, 1050626},
+      {{0, 0}, EV_KEY, BTN_TOOL_PEN, 1},
+      {{0, 0}, EV_MSC, MSC_SERIAL, 159403517},
+      {{0, 0}, EV_SYN, SYN_REPORT, 0},
+      {{0, 0}, EV_ABS, ABS_X, 29380},
+      {{0, 0}, EV_KEY, BTN_STYLUS2, 1},
+      {{0, 0}, EV_MSC, MSC_SERIAL, 159403517},
+      {{0, 0}, EV_SYN, SYN_REPORT, 0},
+      {{0, 0}, EV_ABS, ABS_X, 29355},
+      {{0, 0}, EV_ABS, ABS_Y, 20091},
+      {{0, 0}, EV_ABS, ABS_DISTANCE, 34},
+      {{0, 0}, EV_KEY, BTN_STYLUS2, 0},
+      {{0, 0}, EV_MSC, MSC_SERIAL, 159403517},
+      {{0, 0}, EV_SYN, SYN_REPORT, 0},
+      {{0, 0}, EV_ABS, ABS_X, 0},
+      {{0, 0}, EV_ABS, ABS_Y, 0},
+      {{0, 0}, EV_ABS, ABS_DISTANCE, 0},
+      {{0, 0}, EV_ABS, ABS_TILT_X, 0},
+      {{0, 0}, EV_ABS, ABS_TILT_Y, 0},
+      {{0, 0}, EV_KEY, BTN_TOOL_PEN, 0},
+      {{0, 0}, EV_ABS, ABS_MISC, 0},
+      {{0, 0}, EV_MSC, MSC_SERIAL, 159403517},
+      {{0, 0}, EV_SYN, SYN_REPORT, 0},
+  };
+
+  dev->ProcessEvents(mock_kernel_queue, arraysize(mock_kernel_queue));
+  EXPECT_EQ(3u, dev->size());
+
+  ui::MouseEvent* event = dev->event(0);
+  EXPECT_EQ(ui::ET_MOUSE_MOVED, event->type());
+  event = dev->event(1);
+  EXPECT_EQ(ui::ET_MOUSE_PRESSED, event->type());
+  EXPECT_EQ(true, event->IsRightMouseButton());
+  event = dev->event(2);
+  EXPECT_EQ(ui::ET_MOUSE_RELEASED, event->type());
+  EXPECT_EQ(true, event->IsRightMouseButton());
+}
+
+// Should only get an event if BTN_TOOL received
+TEST_F(TabletEventConverterEvdevTest, CheckStylusFiltering) {
+  ui::MockTabletEventConverterEvdev* dev = device();
+
+  struct input_event mock_kernel_queue[] = {
+      {{0, 0}, EV_ABS, ABS_X, 0},
+      {{0, 0}, EV_ABS, ABS_Y, 0},
+      {{0, 0}, EV_SYN, SYN_REPORT, 0},
+  };
+
+  dev->ProcessEvents(mock_kernel_queue, arraysize(mock_kernel_queue));
+  EXPECT_EQ(0u, dev->size());
+}