shell/platform/linux/fl_touch_manager_test.cc

// Copyright 2013 The Flutter 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 "flutter/shell/platform/linux/fl_touch_manager.h"
#include "flutter/shell/platform/embedder/test_utils/proc_table_replacement.h"
#include "flutter/shell/platform/linux/fl_engine_private.h"
#include "flutter/shell/platform/linux/testing/fl_test.h"

#include <cstring>
#include <vector>

#include "gtest/gtest.h"

static void log_pointer_events(
    FlEngine* engine,
    std::vector<FlutterPointerEvent>& pointer_events) {
  FlutterEngineProcTable* embedder_api = fl_engine_get_embedder_api(engine);
  embedder_api->SendPointerEvent = MOCK_ENGINE_PROC(
      SendPointerEvent,
      ([&pointer_events](auto engine, const FlutterPointerEvent* events,
                         size_t events_count) {
        for (size_t i = 0; i < events_count; i++) {
          pointer_events.push_back(events[i]);
        }

        return kSuccess;
      }));
}

struct _FakeGdkDevice {
  GObject parent_instance;
  gchar* name;
  GdkInputSource source;
};
static GdkDevice* makeFakeDevice(GdkInputSource source) {
  _FakeGdkDevice* device =
      static_cast<_FakeGdkDevice*>(g_malloc0(sizeof(_FakeGdkDevice)));
  device->source = source;
  // Bully the type checker
  (reinterpret_cast<GTypeInstance*>(device))->g_class =
      static_cast<GTypeClass*>(g_malloc0(sizeof(GTypeClass)));
  (reinterpret_cast<GTypeInstance*>(device))->g_class->g_type = GDK_TYPE_DEVICE;
  return reinterpret_cast<GdkDevice*>(device);
}

TEST(FlTouchManagerTest, TouchEvents) {
  g_autoptr(FlEngine) engine = make_mock_engine();
  std::vector<FlutterPointerEvent> pointer_events;
  log_pointer_events(engine, pointer_events);

  g_autoptr(FlTouchManager) manager = fl_touch_manager_new(engine, 0);

  GdkDevice* touchscreen = makeFakeDevice(GDK_SOURCE_TOUCHSCREEN);
  GdkEventTouch* event =
      reinterpret_cast<GdkEventTouch*>(gdk_event_new(GDK_TOUCH_BEGIN));
  event->time = 1;
  event->x = 4.0;
  event->y = 8.0;
  event->device = touchscreen;
  fl_touch_manager_handle_touch_event(manager, event, 1.0);
  EXPECT_EQ(pointer_events.size(), 2u);
  EXPECT_EQ(pointer_events[0].x, 4.0);
  EXPECT_EQ(pointer_events[0].y, 8.0);
  EXPECT_EQ(pointer_events[0].device_kind, kFlutterPointerDeviceKindTouch);
  EXPECT_EQ(pointer_events[0].timestamp,
            1000lu);  // Milliseconds -> Microseconds
  EXPECT_EQ(pointer_events[0].phase, kAdd);

  EXPECT_EQ(pointer_events[1].x, 4.0);
  EXPECT_EQ(pointer_events[1].y, 8.0);
  EXPECT_EQ(pointer_events[1].device_kind, kFlutterPointerDeviceKindTouch);
  EXPECT_EQ(pointer_events[1].timestamp,
            1000lu);  // Milliseconds -> Microseconds
  EXPECT_EQ(pointer_events[1].phase, kDown);

  event->type = GDK_TOUCH_UPDATE;
  fl_touch_manager_handle_touch_event(manager, event, 1.0);
  EXPECT_EQ(pointer_events.size(), 3u);
  EXPECT_EQ(pointer_events[2].x, 4.0);
  EXPECT_EQ(pointer_events[2].y, 8.0);
  EXPECT_EQ(pointer_events[2].device_kind, kFlutterPointerDeviceKindTouch);
  EXPECT_EQ(pointer_events[2].timestamp,
            1000lu);  // Milliseconds -> Microseconds
  EXPECT_EQ(pointer_events[2].phase, kMove);

  event->type = GDK_TOUCH_END;
  fl_touch_manager_handle_touch_event(manager, event, 1.0);
  EXPECT_EQ(pointer_events.size(), 5u);
  EXPECT_EQ(pointer_events[3].x, 4.0);
  EXPECT_EQ(pointer_events[3].y, 8.0);
  EXPECT_EQ(pointer_events[3].device_kind, kFlutterPointerDeviceKindTouch);
  EXPECT_EQ(pointer_events[3].timestamp,
            1000lu);  // Milliseconds -> Microseconds
  EXPECT_EQ(pointer_events[3].phase, kUp);

  EXPECT_EQ(pointer_events[4].x, 4.0);
  EXPECT_EQ(pointer_events[4].y, 8.0);
  EXPECT_EQ(pointer_events[4].device_kind, kFlutterPointerDeviceKindTouch);
  EXPECT_EQ(pointer_events[4].timestamp,
            1000lu);  // Milliseconds -> Microseconds
  EXPECT_EQ(pointer_events[4].phase, kRemove);
}