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// 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.
#import <Cocoa/Cocoa.h>
#include <stdint.h>
#include <memory>
#include "base/mac/scoped_cftyperef.h"
#include "base/mac/sdk_forward_declarations.h"
#include "base/macros.h"
#include "testing/gtest/include/gtest/gtest.h"
#import "ui/events/cocoa/cocoa_event_utils.h"
#include "ui/events/event_constants.h"
#include "ui/events/event_utils.h"
#import "ui/events/test/cocoa_test_event_utils.h"
#include "ui/gfx/geometry/point.h"
#import "ui/gfx/test/ui_cocoa_test_helper.h"
namespace ui {
namespace {
// Although CGEventFlags is just a typedef to int in 10.10 and earlier headers,
// the 10.11 header makes this a CF_ENUM, but doesn't give an option for "none".
const CGEventFlags kNoEventFlags = static_cast<CGEventFlags>(0);
class EventsMacTest : public CocoaTest {
public:
EventsMacTest() {}
gfx::Point Flip(gfx::Point window_location) {
NSRect window_frame = [test_window() frame];
CGFloat content_height =
NSHeight([test_window() contentRectForFrameRect:window_frame]);
window_location.set_y(content_height - window_location.y());
return window_location;
}
// TODO(tapted): Move this to cocoa_test_event_utils. It's not a drop-in
// replacement because -[NSApp sendEvent:] may route events generated this way
// differently.
NSEvent* TestMouseEvent(CGEventType type,
const gfx::Point& window_location,
CGEventFlags event_flags) {
// CGEventCreateMouseEvent() ignores the CGMouseButton parameter unless
// |type| is one of kCGEventOtherMouse{Up,Down,Dragged}. It can be an
// integer up to 31. However, constants are only supplied up to 2. For now,
// just assume "other" means the third/center mouse button, and rely on
// Quartz ignoring it when the type is not "other".
CGMouseButton other_button = kCGMouseButtonCenter;
CGPoint screen_point = cocoa_test_event_utils::ScreenPointFromWindow(
Flip(window_location).ToCGPoint(), test_window());
base::ScopedCFTypeRef<CGEventRef> mouse(
CGEventCreateMouseEvent(nullptr, type, screen_point, other_button));
CGEventSetFlags(mouse, event_flags);
return cocoa_test_event_utils::AttachWindowToCGEvent(mouse, test_window());
}
// Creates a scroll event from a "real" mouse wheel (i.e. not a trackpad).
NSEvent* TestScrollEvent(const gfx::Point& window_location,
int32_t delta_x,
int32_t delta_y) {
bool precise = false;
return cocoa_test_event_utils::TestScrollEvent(
Flip(window_location).ToCGPoint(), test_window(), delta_x, delta_y,
precise, NSEventPhaseNone, NSEventPhaseNone);
}
// Creates the sequence of events generated by a trackpad scroll.
// |initial_rest| indicates whether there is a pause before scrolling starts.
// |delta_y| is the portion to scroll without momentum (fingers on the
// trackpad). |momentum_delta_y| is the momentum portion. A zero delta skips
// that phase (if both are zero, the |initial_rest| is cancelled).
NSArray* TrackpadScrollSequence(bool initial_rest,
int32_t delta_y,
int32_t momentum_delta_y);
protected:
const gfx::Point default_location_ = gfx::Point(10, 20);
private:
DISALLOW_COPY_AND_ASSIGN(EventsMacTest);
};
// Trackpad scroll sequences below determined empirically on OSX 10.11 (linking
// to 10.10 SDK), and dumping out with NSLog in -[NSView scrollWheel:]. First
// created using a Magic Trackpad 2 on a MacPro. See the Trackpad* test cases
// below for example event streams.
NSArray* EventsMacTest::TrackpadScrollSequence(bool initial_rest,
int32_t delta_y,
int32_t momentum_delta_y) {
int32_t delta_x = 0; // Just test vertical scrolling for now.
base::scoped_nsobject<NSMutableArray> events([[NSMutableArray alloc] init]);
// Resting part.
if (initial_rest) {
// MayBegin always has a zero delta.
[events addObject:cocoa_test_event_utils::TestScrollEvent(
Flip(default_location_).ToCGPoint(), test_window(), delta_x, 0, true,
NSEventPhaseMayBegin, NSEventPhaseNone)];
if (delta_y == 0) {
// Rest and release: event gets cancelled.
DCHECK_EQ(0, momentum_delta_y); // Pretty sure this is impossible.
[events addObject:cocoa_test_event_utils::TestScrollEvent(
Flip(default_location_).ToCGPoint(), test_window(), delta_x, 0, true,
NSEventPhaseCancelled, NSEventPhaseNone)];
return events.autorelease();
}
}
// With or without a rest, a begin is sent. It can have a non-zero
// deviceDeltaY but regular deltaY is always 0.
[events addObject:cocoa_test_event_utils::TestScrollEvent(
Flip(default_location_).ToCGPoint(), test_window(), delta_x, 0, true,
NSEventPhaseBegan, NSEventPhaseNone)];
[events addObject:cocoa_test_event_utils::TestScrollEvent(
Flip(default_location_).ToCGPoint(), test_window(), delta_x, delta_y,
true, NSEventPhaseChanged, NSEventPhaseNone)];
// With or without momentum, an end is sent for the non-momentum part.
[events addObject:cocoa_test_event_utils::TestScrollEvent(
Flip(default_location_).ToCGPoint(), test_window(), delta_x, 0, true,
NSEventPhaseEnded, NSEventPhaseNone)];
if (momentum_delta_y == 0)
return events.autorelease();
// Flick part. Basically the same, but with phase and momentumPhase swapped.
[events addObject:cocoa_test_event_utils::TestScrollEvent(
Flip(default_location_).ToCGPoint(), test_window(), delta_x, 0, true,
NSEventPhaseNone, NSEventPhaseBegan)];
[events addObject:cocoa_test_event_utils::TestScrollEvent(
Flip(default_location_).ToCGPoint(), test_window(), delta_x,
momentum_delta_y, true, NSEventPhaseNone, NSEventPhaseChanged)];
[events addObject:cocoa_test_event_utils::TestScrollEvent(
Flip(default_location_).ToCGPoint(), test_window(), delta_x, 0, true,
NSEventPhaseNone, NSEventPhaseEnded)];
return events.autorelease();
}
} // namespace
TEST_F(EventsMacTest, EventFlagsFromNative) {
// Left click.
NSEvent* left = cocoa_test_event_utils::MouseEventWithType(NSLeftMouseUp, 0);
EXPECT_EQ(EF_LEFT_MOUSE_BUTTON, EventFlagsFromNative(left));
// Right click.
NSEvent* right = cocoa_test_event_utils::MouseEventWithType(NSRightMouseUp,
0);
EXPECT_EQ(EF_RIGHT_MOUSE_BUTTON, EventFlagsFromNative(right));
// Middle click.
NSEvent* middle = cocoa_test_event_utils::MouseEventWithType(NSOtherMouseUp,
0);
EXPECT_EQ(EF_MIDDLE_MOUSE_BUTTON, EventFlagsFromNative(middle));
// Caps + Left
NSEvent* caps = cocoa_test_event_utils::MouseEventWithType(
NSLeftMouseUp, NSAlphaShiftKeyMask);
EXPECT_EQ(EF_LEFT_MOUSE_BUTTON | EF_CAPS_LOCK_ON, EventFlagsFromNative(caps));
// Shift + Left
NSEvent* shift = cocoa_test_event_utils::MouseEventWithType(NSLeftMouseUp,
NSShiftKeyMask);
EXPECT_EQ(EF_LEFT_MOUSE_BUTTON | EF_SHIFT_DOWN, EventFlagsFromNative(shift));
// Ctrl + Left. Note we map this to a right click on Mac and remove Control.
NSEvent* ctrl = cocoa_test_event_utils::MouseEventWithType(NSLeftMouseUp,
NSControlKeyMask);
EXPECT_EQ(EF_RIGHT_MOUSE_BUTTON, EventFlagsFromNative(ctrl));
// Ctrl + Right. Remains a right click.
NSEvent* ctrl_right = cocoa_test_event_utils::MouseEventWithType(
NSRightMouseUp, NSControlKeyMask);
EXPECT_EQ(EF_RIGHT_MOUSE_BUTTON | EF_CONTROL_DOWN,
EventFlagsFromNative(ctrl_right));
// Alt + Left
NSEvent* alt = cocoa_test_event_utils::MouseEventWithType(NSLeftMouseUp,
NSAlternateKeyMask);
EXPECT_EQ(EF_LEFT_MOUSE_BUTTON | EF_ALT_DOWN, EventFlagsFromNative(alt));
// Cmd + Left
NSEvent* cmd = cocoa_test_event_utils::MouseEventWithType(NSLeftMouseUp,
NSCommandKeyMask);
EXPECT_EQ(EF_LEFT_MOUSE_BUTTON | EF_COMMAND_DOWN, EventFlagsFromNative(cmd));
// Shift + Ctrl + Left. Also mapped to a right-click. Control removed.
NSEvent* shiftctrl = cocoa_test_event_utils::MouseEventWithType(
NSLeftMouseUp, NSShiftKeyMask | NSControlKeyMask);
EXPECT_EQ(EF_RIGHT_MOUSE_BUTTON | EF_SHIFT_DOWN,
EventFlagsFromNative(shiftctrl));
// Cmd + Alt + Right
NSEvent* cmdalt = cocoa_test_event_utils::MouseEventWithType(
NSLeftMouseUp, NSCommandKeyMask | NSAlternateKeyMask);
EXPECT_EQ(EF_LEFT_MOUSE_BUTTON | EF_COMMAND_DOWN | EF_ALT_DOWN,
EventFlagsFromNative(cmdalt));
}
// Tests mouse button presses and mouse wheel events.
TEST_F(EventsMacTest, ButtonEvents) {
gfx::Point location(5, 10);
gfx::Vector2d offset;
NSEvent* event =
TestMouseEvent(kCGEventLeftMouseDown, location, kNoEventFlags);
EXPECT_EQ(ui::ET_MOUSE_PRESSED, ui::EventTypeFromNative(event));
EXPECT_EQ(ui::EF_LEFT_MOUSE_BUTTON, ui::EventFlagsFromNative(event));
EXPECT_EQ(location, ui::EventLocationFromNative(event));
event =
TestMouseEvent(kCGEventOtherMouseDown, location, kCGEventFlagMaskShift);
EXPECT_EQ(ui::ET_MOUSE_PRESSED, ui::EventTypeFromNative(event));
EXPECT_EQ(ui::EF_MIDDLE_MOUSE_BUTTON | ui::EF_SHIFT_DOWN,
ui::EventFlagsFromNative(event));
EXPECT_EQ(location, ui::EventLocationFromNative(event));
event = TestMouseEvent(kCGEventRightMouseUp, location, kNoEventFlags);
EXPECT_EQ(ui::ET_MOUSE_RELEASED, ui::EventTypeFromNative(event));
EXPECT_EQ(ui::EF_RIGHT_MOUSE_BUTTON, ui::EventFlagsFromNative(event));
EXPECT_EQ(location, ui::EventLocationFromNative(event));
// Scroll up.
event = TestScrollEvent(location, 0, 1);
EXPECT_EQ(ui::ET_SCROLL, ui::EventTypeFromNative(event));
EXPECT_EQ(0, ui::EventFlagsFromNative(event));
EXPECT_EQ(location.ToString(), ui::EventLocationFromNative(event).ToString());
offset = ui::GetMouseWheelOffset(event);
EXPECT_GT(offset.y(), 0);
EXPECT_EQ(0, offset.x());
// Scroll down.
event = TestScrollEvent(location, 0, -1);
EXPECT_EQ(ui::ET_SCROLL, ui::EventTypeFromNative(event));
EXPECT_EQ(0, ui::EventFlagsFromNative(event));
EXPECT_EQ(location, ui::EventLocationFromNative(event));
offset = ui::GetMouseWheelOffset(event);
EXPECT_LT(offset.y(), 0);
EXPECT_EQ(0, offset.x());
// Scroll left.
event = TestScrollEvent(location, 1, 0);
EXPECT_EQ(ui::ET_SCROLL, ui::EventTypeFromNative(event));
EXPECT_EQ(0, ui::EventFlagsFromNative(event));
EXPECT_EQ(location, ui::EventLocationFromNative(event));
offset = ui::GetMouseWheelOffset(event);
EXPECT_EQ(0, offset.y());
EXPECT_GT(offset.x(), 0);
// Scroll right.
event = TestScrollEvent(location, -1, 0);
EXPECT_EQ(ui::ET_SCROLL, ui::EventTypeFromNative(event));
EXPECT_EQ(0, ui::EventFlagsFromNative(event));
EXPECT_EQ(location, ui::EventLocationFromNative(event));
offset = ui::GetMouseWheelOffset(event);
EXPECT_EQ(0, offset.y());
EXPECT_LT(offset.x(), 0);
}
// Test correct location when the window has a native titlebar.
TEST_F(EventsMacTest, NativeTitlebarEventLocation) {
gfx::Point location(5, 10);
NSUInteger style_mask = NSTitledWindowMask | NSClosableWindowMask |
NSMiniaturizableWindowMask | NSResizableWindowMask;
// First check that the window provided by ui::CocoaTest is how we think.
DCHECK_EQ(NSBorderlessWindowMask, [test_window() styleMask]);
[test_window() setStyleMask:style_mask];
DCHECK_EQ(style_mask, [test_window() styleMask]);
// EventLocationFromNative should behave the same as the ButtonEvents test.
NSEvent* event =
TestMouseEvent(kCGEventLeftMouseDown, location, kNoEventFlags);
EXPECT_EQ(ui::ET_MOUSE_PRESSED, ui::EventTypeFromNative(event));
EXPECT_EQ(ui::EF_LEFT_MOUSE_BUTTON, ui::EventFlagsFromNative(event));
EXPECT_EQ(location, ui::EventLocationFromNative(event));
// And be explicit, to ensure the test doesn't depend on some property of the
// test harness. The change to the frame rect could be OS-specfic, so set it
// to a known value.
const CGFloat kTestHeight = 400;
NSRect content_rect = NSMakeRect(0, 0, 600, kTestHeight);
NSRect frame_rect = [test_window() frameRectForContentRect:content_rect];
[test_window() setFrame:frame_rect display:YES];
event = [NSEvent mouseEventWithType:NSLeftMouseDown
location:NSMakePoint(0, 0) // Bottom-left corner.
modifierFlags:0
timestamp:0
windowNumber:[test_window() windowNumber]
context:nil
eventNumber:0
clickCount:0
pressure:1.0];
// Bottom-left corner should be flipped.
EXPECT_EQ(gfx::Point(0, kTestHeight), ui::EventLocationFromNative(event));
// Removing the border, and sending the same event should move it down in the
// toolkit-views coordinate system.
int height_change = NSHeight(frame_rect) - kTestHeight;
EXPECT_GT(height_change, 0);
[test_window() setStyleMask:NSBorderlessWindowMask];
[test_window() setFrame:frame_rect display:YES];
EXPECT_EQ(gfx::Point(0, kTestHeight + height_change),
ui::EventLocationFromNative(event));
}
// Testing for ui::EventTypeFromNative() not covered by ButtonEvents.
TEST_F(EventsMacTest, EventTypeFromNative) {
NSEvent* event = cocoa_test_event_utils::KeyEventWithType(NSKeyDown, 0);
EXPECT_EQ(ui::ET_KEY_PRESSED, ui::EventTypeFromNative(event));
event = cocoa_test_event_utils::KeyEventWithType(NSKeyUp, 0);
EXPECT_EQ(ui::ET_KEY_RELEASED, ui::EventTypeFromNative(event));
event = cocoa_test_event_utils::MouseEventWithType(NSLeftMouseDragged, 0);
EXPECT_EQ(ui::ET_MOUSE_DRAGGED, ui::EventTypeFromNative(event));
event = cocoa_test_event_utils::MouseEventWithType(NSRightMouseDragged, 0);
EXPECT_EQ(ui::ET_MOUSE_DRAGGED, ui::EventTypeFromNative(event));
event = cocoa_test_event_utils::MouseEventWithType(NSOtherMouseDragged, 0);
EXPECT_EQ(ui::ET_MOUSE_DRAGGED, ui::EventTypeFromNative(event));
event = cocoa_test_event_utils::MouseEventWithType(NSMouseMoved, 0);
EXPECT_EQ(ui::ET_MOUSE_MOVED, ui::EventTypeFromNative(event));
event = cocoa_test_event_utils::EnterEvent();
EXPECT_EQ(ui::ET_MOUSE_ENTERED, ui::EventTypeFromNative(event));
event = cocoa_test_event_utils::ExitEvent();
EXPECT_EQ(ui::ET_MOUSE_EXITED, ui::EventTypeFromNative(event));
}
// Verify that a mouse wheel scroll event is correctly lacking phase data.
TEST_F(EventsMacTest, MouseWheelScroll) {
int32_t wheel_delta_y = 2;
NSEvent* ns_wheel = TestScrollEvent(default_location_, 0, wheel_delta_y);
EXPECT_FALSE([ns_wheel hasPreciseScrollingDeltas]);
ui::ScrollEvent wheel(ns_wheel);
EXPECT_EQ(ui::ET_SCROLL, wheel.type());
// Currently wheel events still say two for finger count, but this may change.
EXPECT_EQ(2, wheel.finger_count());
// Note the phase is "end" for wheel events, not "none". There is always an
// "end" when no more events are expected.
EXPECT_EQ(ui::EventMomentumPhase::END, wheel.momentum_phase());
EXPECT_EQ(default_location_, wheel.location());
float pixel_delta_y = wheel_delta_y * ui::kScrollbarPixelsPerCocoaTick;
EXPECT_EQ(pixel_delta_y, wheel.y_offset_ordinal());
EXPECT_EQ(0, wheel.x_offset_ordinal());
}
// Test the event flow for a trackpad "rest" that doesn't result in scrolling
// nor momentum. Also check the boring stuff like type, finger count and
// location, which isn't phase-specific.
// Sequence:
// (1) NSEvent: type=ScrollWheel loc=(780,41) time=14909.3 flags=0x100 win=<set>
// {deviceD,d}elta{X,Y,Z}=0 count:0 phase=MayBegin momentumPhase=None
// (2) NSEvent: type=ScrollWheel loc=(780,41) time=14912.9 flags=0x100 win=<set>
// {deviceD,d}elta{X,Y,Z}=0 count:0 phase=Cancelled momentumPhase=None.
TEST_F(EventsMacTest, TrackpadRestRelease) {
NSArray* ns_events = TrackpadScrollSequence(true, 0, 0);
ASSERT_EQ(2u, [ns_events count]);
EXPECT_TRUE([ns_events[0] hasPreciseScrollingDeltas]);
ui::ScrollEvent rest(ns_events[0]);
EXPECT_EQ(ui::ET_SCROLL, rest.type());
EXPECT_EQ(2, rest.finger_count());
EXPECT_EQ(ui::EventMomentumPhase::MAY_BEGIN, rest.momentum_phase());
EXPECT_EQ(0, rest.y_offset_ordinal());
EXPECT_EQ(default_location_, rest.location());
ui::ScrollEvent cancel(ns_events[1]);
EXPECT_EQ(ui::ET_SCROLL, cancel.type());
EXPECT_EQ(2, cancel.finger_count());
EXPECT_EQ(ui::EventMomentumPhase::END, cancel.momentum_phase());
EXPECT_EQ(0, cancel.y_offset_ordinal());
EXPECT_EQ(default_location_, cancel.location());
}
// Test the event flow for touching the trackpad while "in motion" already, then
// pausing so that a flick is not generated. deltaX and deltaZ are always zero.
// Note, deviceDeltaX may take on an integer value even though deltaX is zero.
// Sequence:
// (1) NSEvent: type=ScrollWheel loc=(780,41) time=15263.2 flags=0x100 win=<set>
// deltaY=0.000000 deviceDeltaY=1.000000 phase=Began momentumPhase=None
// (n) NSEvent: type=ScrollWheel loc=(780,41) time=15263.2 flags=0x100 win=<set>
// deltaY=0.400024 deviceDeltaY=3.000000 phase=Changed momentumPhase=None
// (3) NSEvent: type=ScrollWheel loc=(780,41) time=15264.2 flags=0x100 win=<set>
// deltaY=0.000000 deviceDeltaY=0.000000 phase=Ended momentumPhase=None.
TEST_F(EventsMacTest, TrackpadScrollThenRest) {
int32_t delta_y = 21;
NSArray* ns_events = TrackpadScrollSequence(false, delta_y, 0);
ASSERT_EQ(3u, [ns_events count]);
ui::ScrollEvent begin(ns_events[0]);
EXPECT_EQ(ui::EventMomentumPhase::MAY_BEGIN, begin.momentum_phase());
EXPECT_EQ(0, begin.y_offset_ordinal());
ui::ScrollEvent update(ns_events[1]);
// There's no momentum yet, so phase is none.
EXPECT_EQ(ui::EventMomentumPhase::NONE, update.momentum_phase());
// Note: No pixel conversion for "precise" deltas.
EXPECT_EQ(delta_y, update.y_offset_ordinal());
ui::ScrollEvent end(ns_events[2]);
EXPECT_EQ(ui::EventMomentumPhase::END, end.momentum_phase());
EXPECT_EQ(0, end.y_offset_ordinal());
}
// Same as the above, but with an initial rest, which is not cancelled. This
// results in multiple MAY_BEGIN phases.
TEST_F(EventsMacTest, TrackpadRestThenScrollThenRest) {
int32_t delta_y = 21;
NSArray* ns_events = TrackpadScrollSequence(true, delta_y, 0);
ASSERT_EQ(4u, [ns_events count]);
ui::ScrollEvent rest(ns_events[0]);
EXPECT_EQ(ui::EventMomentumPhase::MAY_BEGIN, rest.momentum_phase());
EXPECT_EQ(0, rest.y_offset_ordinal());
ui::ScrollEvent begin(ns_events[1]);
EXPECT_EQ(ui::EventMomentumPhase::MAY_BEGIN, begin.momentum_phase());
EXPECT_EQ(0, begin.y_offset_ordinal());
ui::ScrollEvent update(ns_events[2]);
EXPECT_EQ(ui::EventMomentumPhase::NONE, update.momentum_phase());
EXPECT_EQ(delta_y, update.y_offset_ordinal());
ui::ScrollEvent end(ns_events[3]);
EXPECT_EQ(ui::EventMomentumPhase::END, end.momentum_phase());
EXPECT_EQ(0, end.y_offset_ordinal());
}
// Test the event flows that lead to momentum, with and without an initial rest.
// Example sequence (no initial rest):
// (1) NSEvent: type=ScrollWheel loc=(780,41) time=15187.5 flags=0x100 win=<set>
// deltaY=0.000000 deviceDeltaY=1.000000 phase=Began momentumPhase=None
// (n) NSEvent: type=ScrollWheel loc=(780,41) time=15187.5 flags=0x100 win=<set>
// deltaY=0.500031 deviceDeltaY=4.000000 phase=Changed momentumPhase=None
// (3) NSEvent: type=ScrollWheel loc=(780,41) time=15187.6 flags=0x100 win=<set>
// deltaY=0.000000 deviceDeltaY=0.000000 phase=Ended momentumPhase=None
// (4) NSEvent: type=ScrollWheel loc=(780,41) time=15187.6 flags=0x100 win=<set>
// deltaY=0.900055 deviceDeltaY=3.000000 phase=None momentumPhase=Began
// (n) NSEvent: type=ScrollWheel loc=(780,41) time=15187.6 flags=0x100 win=<set>
// deltaY=0.300018 deviceDeltaY=3.000000 phase=None momentumPhase=Changed
// (6) NSEvent: type=ScrollWheel loc=(780,41) time=15188.0 flags=0x100 win=<set>
// deltaY=0.000000 deviceDeltaY=0.000000 phase=None momentumPhase=Ended.
TEST_F(EventsMacTest, TrackpadScrollThenFlick) {
int32_t delta_y = 21;
int32_t momentum_delta_y = 33;
NSArray* ns_events = TrackpadScrollSequence(false, delta_y, momentum_delta_y);
ASSERT_EQ(6u, [ns_events count]);
// Non-momentum part.
{
ui::ScrollEvent begin(ns_events[0]);
EXPECT_EQ(ui::EventMomentumPhase::MAY_BEGIN, begin.momentum_phase());
EXPECT_EQ(0, begin.y_offset_ordinal());
ui::ScrollEvent update(ns_events[1]);
EXPECT_EQ(ui::EventMomentumPhase::NONE, update.momentum_phase());
EXPECT_EQ(delta_y, update.y_offset_ordinal());
ui::ScrollEvent end(ns_events[2]);
// Even though the event stream continues, AppKit doesn't provide a way to
// know this without peeking at future events. So this "end" mid-stream is
// unavoidable.
EXPECT_EQ(ui::EventMomentumPhase::END, end.momentum_phase());
EXPECT_EQ(0, end.y_offset_ordinal());
}
// Momentum part.
{
ui::ScrollEvent begin(ns_events[3]);
// Since a momentum "begin" is really a continuation of the stream, it's
// currently treated as an update, but the offsets should always be zero.
EXPECT_EQ(ui::EventMomentumPhase::INERTIAL_UPDATE, begin.momentum_phase());
EXPECT_EQ(0, begin.y_offset_ordinal());
ui::ScrollEvent update(ns_events[4]);
EXPECT_EQ(ui::EventMomentumPhase::INERTIAL_UPDATE, update.momentum_phase());
EXPECT_EQ(momentum_delta_y, update.y_offset_ordinal());
ui::ScrollEvent end(ns_events[5]);
EXPECT_EQ(ui::EventMomentumPhase::END, end.momentum_phase());
EXPECT_EQ(0, end.y_offset_ordinal());
}
}
} // namespace ui