| // 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/events/event_utils.h" |
| |
| #include <vector> |
| |
| #include "base/metrics/histogram_macros.h" |
| #include "base/numerics/safe_conversions.h" |
| #include "ui/display/display.h" |
| #include "ui/display/screen.h" |
| |
| namespace ui { |
| |
| namespace { |
| int g_custom_event_types = ET_LAST; |
| } // namespace |
| |
| std::unique_ptr<Event> EventFromNative(const PlatformEvent& native_event) { |
| std::unique_ptr<Event> event; |
| EventType type = EventTypeFromNative(native_event); |
| switch(type) { |
| case ET_KEY_PRESSED: |
| case ET_KEY_RELEASED: |
| event.reset(new KeyEvent(native_event)); |
| break; |
| |
| case ET_MOUSE_PRESSED: |
| case ET_MOUSE_DRAGGED: |
| case ET_MOUSE_RELEASED: |
| case ET_MOUSE_MOVED: |
| case ET_MOUSE_ENTERED: |
| case ET_MOUSE_EXITED: |
| event.reset(new MouseEvent(native_event)); |
| break; |
| |
| case ET_MOUSEWHEEL: |
| event.reset(new MouseWheelEvent(native_event)); |
| break; |
| |
| case ET_SCROLL_FLING_START: |
| case ET_SCROLL_FLING_CANCEL: |
| case ET_SCROLL: |
| event.reset(new ScrollEvent(native_event)); |
| break; |
| |
| case ET_TOUCH_RELEASED: |
| case ET_TOUCH_PRESSED: |
| case ET_TOUCH_MOVED: |
| case ET_TOUCH_CANCELLED: |
| event.reset(new TouchEvent(native_event)); |
| break; |
| |
| default: |
| break; |
| } |
| return event; |
| } |
| |
| int RegisterCustomEventType() { |
| return ++g_custom_event_types; |
| } |
| |
| bool IsValidTimebase(base::TimeTicks now, base::TimeTicks timestamp) { |
| int64_t delta = (now - timestamp).InMilliseconds(); |
| return delta >= 0 && delta <= 60 * 1000; |
| } |
| |
| void ValidateEventTimeClock(base::TimeTicks* timestamp) { |
| // Some fraction of devices, across all platforms provide bogus event |
| // timestamps. See https://crbug.com/650338#c1. Correct timestamps which are |
| // clearly bogus. |
| // TODO(861855): Replace this with an approach that doesn't require an extra |
| // read of the current time per event. |
| base::TimeTicks now = EventTimeForNow(); |
| if (!IsValidTimebase(now, *timestamp)) |
| *timestamp = now; |
| } |
| |
| bool ShouldDefaultToNaturalScroll() { |
| return GetInternalDisplayTouchSupport() == |
| display::Display::TouchSupport::AVAILABLE; |
| } |
| |
| display::Display::TouchSupport GetInternalDisplayTouchSupport() { |
| display::Screen* screen = display::Screen::GetScreen(); |
| // No screen in some unit tests. |
| if (!screen) |
| return display::Display::TouchSupport::UNKNOWN; |
| const std::vector<display::Display>& displays = screen->GetAllDisplays(); |
| for (auto it = displays.begin(); it != displays.end(); ++it) { |
| if (it->IsInternal()) |
| return it->touch_support(); |
| } |
| return display::Display::TouchSupport::UNAVAILABLE; |
| } |
| |
| void ComputeEventLatencyOS(const PlatformEvent& native_event) { |
| base::TimeTicks current_time = EventTimeForNow(); |
| base::TimeTicks time_stamp = EventTimeFromNative(native_event); |
| base::TimeDelta delta = current_time - time_stamp; |
| |
| EventType type = EventTypeFromNative(native_event); |
| switch (type) { |
| #if defined(OS_MACOSX) |
| // On Mac, ET_SCROLL and ET_MOUSEWHEEL represent the same class of events. |
| case ET_SCROLL: |
| #endif |
| case ET_MOUSEWHEEL: |
| UMA_HISTOGRAM_CUSTOM_COUNTS( |
| "Event.Latency.OS.MOUSE_WHEEL", |
| base::saturated_cast<int>(delta.InMicroseconds()), 1, 1000000, 50); |
| return; |
| case ET_TOUCH_MOVED: |
| UMA_HISTOGRAM_CUSTOM_COUNTS( |
| "Event.Latency.OS.TOUCH_MOVED", |
| base::saturated_cast<int>(delta.InMicroseconds()), 1, 1000000, 50); |
| return; |
| case ET_TOUCH_PRESSED: |
| UMA_HISTOGRAM_CUSTOM_COUNTS( |
| "Event.Latency.OS.TOUCH_PRESSED", |
| base::saturated_cast<int>(delta.InMicroseconds()), 1, 1000000, 50); |
| return; |
| case ET_TOUCH_RELEASED: |
| UMA_HISTOGRAM_CUSTOM_COUNTS( |
| "Event.Latency.OS.TOUCH_RELEASED", |
| base::saturated_cast<int>(delta.InMicroseconds()), 1, 1000000, 50); |
| return; |
| default: |
| return; |
| } |
| } |
| |
| void ConvertEventLocationToTargetWindowLocation( |
| const gfx::Point& target_window_origin, |
| const gfx::Point& current_window_origin, |
| ui::LocatedEvent* located_event) { |
| if (current_window_origin == target_window_origin) |
| return; |
| |
| DCHECK(located_event); |
| gfx::Vector2d offset = current_window_origin - target_window_origin; |
| gfx::PointF location_in_pixel_in_host = |
| located_event->location_f() + gfx::Vector2dF(offset); |
| located_event->set_location_f(location_in_pixel_in_host); |
| located_event->set_root_location_f(location_in_pixel_in_host); |
| } |
| |
| const char* EventTypeName(EventType type) { |
| if (type >= ET_LAST) |
| return ""; |
| |
| #define CASE_TYPE(t) \ |
| case t: \ |
| return #t |
| |
| switch (type) { |
| CASE_TYPE(ET_UNKNOWN); |
| CASE_TYPE(ET_MOUSE_PRESSED); |
| CASE_TYPE(ET_MOUSE_DRAGGED); |
| CASE_TYPE(ET_MOUSE_RELEASED); |
| CASE_TYPE(ET_MOUSE_MOVED); |
| CASE_TYPE(ET_MOUSE_ENTERED); |
| CASE_TYPE(ET_MOUSE_EXITED); |
| CASE_TYPE(ET_KEY_PRESSED); |
| CASE_TYPE(ET_KEY_RELEASED); |
| CASE_TYPE(ET_MOUSEWHEEL); |
| CASE_TYPE(ET_MOUSE_CAPTURE_CHANGED); |
| CASE_TYPE(ET_TOUCH_RELEASED); |
| CASE_TYPE(ET_TOUCH_PRESSED); |
| CASE_TYPE(ET_TOUCH_MOVED); |
| CASE_TYPE(ET_TOUCH_CANCELLED); |
| CASE_TYPE(ET_DROP_TARGET_EVENT); |
| CASE_TYPE(ET_GESTURE_SCROLL_BEGIN); |
| CASE_TYPE(ET_GESTURE_SCROLL_END); |
| CASE_TYPE(ET_GESTURE_SCROLL_UPDATE); |
| CASE_TYPE(ET_GESTURE_SHOW_PRESS); |
| CASE_TYPE(ET_GESTURE_TAP); |
| CASE_TYPE(ET_GESTURE_TAP_DOWN); |
| CASE_TYPE(ET_GESTURE_TAP_CANCEL); |
| CASE_TYPE(ET_GESTURE_BEGIN); |
| CASE_TYPE(ET_GESTURE_END); |
| CASE_TYPE(ET_GESTURE_TWO_FINGER_TAP); |
| CASE_TYPE(ET_GESTURE_PINCH_BEGIN); |
| CASE_TYPE(ET_GESTURE_PINCH_END); |
| CASE_TYPE(ET_GESTURE_PINCH_UPDATE); |
| CASE_TYPE(ET_GESTURE_LONG_PRESS); |
| CASE_TYPE(ET_GESTURE_LONG_TAP); |
| CASE_TYPE(ET_GESTURE_SWIPE); |
| CASE_TYPE(ET_GESTURE_TAP_UNCONFIRMED); |
| CASE_TYPE(ET_GESTURE_DOUBLE_TAP); |
| CASE_TYPE(ET_SCROLL); |
| CASE_TYPE(ET_SCROLL_FLING_START); |
| CASE_TYPE(ET_SCROLL_FLING_CANCEL); |
| CASE_TYPE(ET_CANCEL_MODE); |
| CASE_TYPE(ET_UMA_DATA); |
| case ET_LAST: |
| NOTREACHED(); |
| return ""; |
| // Don't include default, so that we get an error when new type is added. |
| } |
| #undef CASE_TYPE |
| |
| NOTREACHED(); |
| return ""; |
| } |
| |
| } // namespace ui |