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event.cc
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// 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.h"
#include <cmath>
#include <cstring>
#include <utility>
#include "base/memory/ptr_util.h"
#include "base/metrics/histogram.h"
#include "base/metrics/histogram_macros.h"
#include "base/strings/stringprintf.h"
#include "build/build_config.h"
#include "ui/events/base_event_utils.h"
#include "ui/events/event_utils.h"
#include "ui/events/keycodes/dom/dom_code.h"
#include "ui/events/keycodes/dom/dom_key.h"
#include "ui/events/keycodes/dom/keycode_converter.h"
#include "ui/events/keycodes/keyboard_code_conversion.h"
#include "ui/gfx/geometry/point3_f.h"
#include "ui/gfx/geometry/point_conversions.h"
#include "ui/gfx/geometry/safe_integer_conversions.h"
#include "ui/gfx/transform.h"
#include "ui/gfx/transform_util.h"
#if defined(USE_X11)
#include "ui/events/keycodes/keyboard_code_conversion_x.h" // nogncheck
#include "ui/gfx/x/x11.h" // nogncheck
#elif defined(USE_OZONE)
#include "ui/events/ozone/layout/keyboard_layout_engine.h" // nogncheck
#include "ui/events/ozone/layout/keyboard_layout_engine_manager.h" // nogncheck
#endif
#if defined(OS_WIN)
#include "ui/events/keycodes/platform_key_map_win.h"
#endif
namespace ui {
namespace {
#if defined(USE_X11)
bool X11EventHasNonStandardState(const PlatformEvent& event) {
const unsigned int kAllStateMask =
Button1Mask | Button2Mask | Button3Mask | Button4Mask | Button5Mask |
Mod1Mask | Mod2Mask | Mod3Mask | Mod4Mask | Mod5Mask | ShiftMask |
LockMask | ControlMask | AnyModifier;
return event && (event->xkey.state & ~kAllStateMask) != 0;
}
#endif
constexpr int kChangedButtonFlagMask =
ui::EF_LEFT_MOUSE_BUTTON | ui::EF_MIDDLE_MOUSE_BUTTON |
ui::EF_RIGHT_MOUSE_BUTTON | ui::EF_BACK_MOUSE_BUTTON |
ui::EF_FORWARD_MOUSE_BUTTON;
SourceEventType EventTypeToLatencySourceEventType(EventType type) {
switch (type) {
case ET_UNKNOWN:
// SourceEventType for GestureEvents can be either TOUCH or WHEEL. The
// proper value is assigned in the constructors.
case ET_GESTURE_SCROLL_BEGIN:
case ET_GESTURE_SCROLL_END:
case ET_GESTURE_SCROLL_UPDATE:
case ET_GESTURE_TAP:
case ET_GESTURE_TAP_DOWN:
case ET_GESTURE_TAP_CANCEL:
case ET_GESTURE_TAP_UNCONFIRMED:
case ET_GESTURE_DOUBLE_TAP:
case ET_GESTURE_BEGIN:
case ET_GESTURE_END:
case ET_GESTURE_TWO_FINGER_TAP:
case ET_GESTURE_PINCH_BEGIN:
case ET_GESTURE_PINCH_END:
case ET_GESTURE_PINCH_UPDATE:
case ET_GESTURE_LONG_PRESS:
case ET_GESTURE_LONG_TAP:
case ET_GESTURE_SWIPE:
case ET_GESTURE_SHOW_PRESS:
// Flings can be GestureEvents too.
case ET_SCROLL_FLING_START:
case ET_SCROLL_FLING_CANCEL:
return SourceEventType::UNKNOWN;
case ui::ET_KEY_PRESSED:
return ui::SourceEventType::KEY_PRESS;
case ET_MOUSE_PRESSED:
case ET_MOUSE_DRAGGED:
case ET_MOUSE_RELEASED:
case ET_MOUSE_MOVED:
case ET_MOUSE_ENTERED:
case ET_MOUSE_EXITED:
// We measure latency for key presses, not key releases. Most behavior is
// keyed off of presses, and release latency is higher than press latency as
// it's impacted by event handling of the press event.
case ET_KEY_RELEASED:
case ET_MOUSE_CAPTURE_CHANGED:
case ET_DROP_TARGET_EVENT:
case ET_CANCEL_MODE:
case ET_UMA_DATA:
return SourceEventType::OTHER;
case ET_TOUCH_RELEASED:
case ET_TOUCH_PRESSED:
case ET_TOUCH_MOVED:
case ET_TOUCH_CANCELLED:
return SourceEventType::TOUCH;
case ET_MOUSEWHEEL:
case ET_SCROLL:
return SourceEventType::WHEEL;
case ET_LAST:
NOTREACHED();
return SourceEventType::UNKNOWN;
}
NOTREACHED();
return SourceEventType::UNKNOWN;
}
} // namespace
////////////////////////////////////////////////////////////////////////////////
// Event
// static
std::unique_ptr<Event> Event::Clone(const Event& event) {
if (event.IsKeyEvent()) {
return std::make_unique<KeyEvent>(static_cast<const KeyEvent&>(event));
}
if (event.IsMouseEvent()) {
if (event.IsMouseWheelEvent()) {
return std::make_unique<MouseWheelEvent>(
static_cast<const MouseWheelEvent&>(event));
}
return std::make_unique<MouseEvent>(static_cast<const MouseEvent&>(event));
}
if (event.IsTouchEvent()) {
return std::make_unique<TouchEvent>(static_cast<const TouchEvent&>(event));
}
if (event.IsGestureEvent()) {
return std::make_unique<GestureEvent>(
static_cast<const GestureEvent&>(event));
}
if (event.IsScrollEvent()) {
return std::make_unique<ScrollEvent>(
static_cast<const ScrollEvent&>(event));
}
return base::WrapUnique(new Event(event));
}
Event::~Event() {
if (delete_native_event_)
ReleaseCopiedNativeEvent(native_event_);
}
const char* Event::GetName() const {
return EventTypeName(type_);
}
void Event::SetProperties(const Properties& properties) {
properties_ = std::make_unique<Properties>(properties);
}
CancelModeEvent* Event::AsCancelModeEvent() {
CHECK(IsCancelModeEvent());
return static_cast<CancelModeEvent*>(this);
}
const CancelModeEvent* Event::AsCancelModeEvent() const {
CHECK(IsCancelModeEvent());
return static_cast<const CancelModeEvent*>(this);
}
GestureEvent* Event::AsGestureEvent() {
CHECK(IsGestureEvent());
return static_cast<GestureEvent*>(this);
}
const GestureEvent* Event::AsGestureEvent() const {
CHECK(IsGestureEvent());
return static_cast<const GestureEvent*>(this);
}
KeyEvent* Event::AsKeyEvent() {
CHECK(IsKeyEvent());
return static_cast<KeyEvent*>(this);
}
const KeyEvent* Event::AsKeyEvent() const {
CHECK(IsKeyEvent());
return static_cast<const KeyEvent*>(this);
}
LocatedEvent* Event::AsLocatedEvent() {
CHECK(IsLocatedEvent());
return static_cast<LocatedEvent*>(this);
}
const LocatedEvent* Event::AsLocatedEvent() const {
CHECK(IsLocatedEvent());
return static_cast<const LocatedEvent*>(this);
}
MouseEvent* Event::AsMouseEvent() {
CHECK(IsMouseEvent());
return static_cast<MouseEvent*>(this);
}
const MouseEvent* Event::AsMouseEvent() const {
CHECK(IsMouseEvent());
return static_cast<const MouseEvent*>(this);
}
MouseWheelEvent* Event::AsMouseWheelEvent() {
CHECK(IsMouseWheelEvent());
return static_cast<MouseWheelEvent*>(this);
}
const MouseWheelEvent* Event::AsMouseWheelEvent() const {
CHECK(IsMouseWheelEvent());
return static_cast<const MouseWheelEvent*>(this);
}
ScrollEvent* Event::AsScrollEvent() {
CHECK(IsScrollEvent());
return static_cast<ScrollEvent*>(this);
}
const ScrollEvent* Event::AsScrollEvent() const {
CHECK(IsScrollEvent());
return static_cast<const ScrollEvent*>(this);
}
TouchEvent* Event::AsTouchEvent() {
CHECK(IsTouchEvent());
return static_cast<TouchEvent*>(this);
}
const TouchEvent* Event::AsTouchEvent() const {
CHECK(IsTouchEvent());
return static_cast<const TouchEvent*>(this);
}
bool Event::HasNativeEvent() const {
PlatformEvent null_event;
std::memset(&null_event, 0, sizeof(null_event));
return !!std::memcmp(&native_event_, &null_event, sizeof(null_event));
}
void Event::StopPropagation() {
// TODO(sad): Re-enable these checks once View uses dispatcher to dispatch
// events.
// CHECK(phase_ != EP_PREDISPATCH && phase_ != EP_POSTDISPATCH);
CHECK(cancelable_);
result_ = static_cast<EventResult>(result_ | ER_CONSUMED);
}
void Event::SetHandled() {
// TODO(sad): Re-enable these checks once View uses dispatcher to dispatch
// events.
// CHECK(phase_ != EP_PREDISPATCH && phase_ != EP_POSTDISPATCH);
CHECK(cancelable_);
result_ = static_cast<EventResult>(result_ | ER_HANDLED);
}
Event::Event(EventType type, base::TimeTicks time_stamp, int flags)
: type_(type),
time_stamp_(time_stamp),
flags_(flags),
native_event_(PlatformEvent()),
delete_native_event_(false),
cancelable_(true),
target_(NULL),
phase_(EP_PREDISPATCH),
result_(ER_UNHANDLED),
source_device_id_(ED_UNKNOWN_DEVICE) {
if (type_ < ET_LAST)
latency()->set_source_event_type(EventTypeToLatencySourceEventType(type));
}
Event::Event(const PlatformEvent& native_event, EventType type, int flags)
: type_(type),
time_stamp_(EventTimeFromNative(native_event)),
flags_(flags),
native_event_(native_event),
delete_native_event_(false),
cancelable_(true),
target_(NULL),
phase_(EP_PREDISPATCH),
result_(ER_UNHANDLED),
source_device_id_(ED_UNKNOWN_DEVICE) {
if (type_ < ET_LAST)
latency()->set_source_event_type(EventTypeToLatencySourceEventType(type));
ComputeEventLatencyOS(native_event);
#if defined(USE_X11)
if (native_event->type == GenericEvent) {
XIDeviceEvent* xiev =
static_cast<XIDeviceEvent*>(native_event->xcookie.data);
source_device_id_ = xiev->sourceid;
}
#endif
#if defined(USE_OZONE)
source_device_id_ =
static_cast<const Event*>(native_event)->source_device_id();
#endif
}
Event::Event(const Event& copy)
: type_(copy.type_),
time_stamp_(copy.time_stamp_),
latency_(copy.latency_),
flags_(copy.flags_),
native_event_(CopyNativeEvent(copy.native_event_)),
delete_native_event_(true),
cancelable_(true),
target_(NULL),
phase_(EP_PREDISPATCH),
result_(ER_UNHANDLED),
source_device_id_(copy.source_device_id_),
properties_(copy.properties_
? std::make_unique<Properties>(*copy.properties_)
: nullptr) {}
Event& Event::operator=(const Event& rhs) {
if (this != &rhs) {
if (delete_native_event_)
ReleaseCopiedNativeEvent(native_event_);
type_ = rhs.type_;
time_stamp_ = rhs.time_stamp_;
latency_ = rhs.latency_;
flags_ = rhs.flags_;
native_event_ = CopyNativeEvent(rhs.native_event_);
delete_native_event_ = true;
cancelable_ = rhs.cancelable_;
target_ = rhs.target_;
phase_ = rhs.phase_;
result_ = rhs.result_;
source_device_id_ = rhs.source_device_id_;
if (rhs.properties_)
properties_ = std::make_unique<Properties>(*rhs.properties_);
else
properties_.reset();
}
latency_.set_source_event_type(ui::SourceEventType::OTHER);
return *this;
}
void Event::SetType(EventType type) {
type_ = type;
if (type_ < ET_LAST)
latency()->set_source_event_type(EventTypeToLatencySourceEventType(type));
}
////////////////////////////////////////////////////////////////////////////////
// CancelModeEvent
CancelModeEvent::CancelModeEvent()
: Event(ET_CANCEL_MODE, base::TimeTicks(), 0) {
set_cancelable(false);
}
CancelModeEvent::~CancelModeEvent() {
}
////////////////////////////////////////////////////////////////////////////////
// LocatedEvent
LocatedEvent::~LocatedEvent() = default;
LocatedEvent::LocatedEvent(const PlatformEvent& native_event)
: Event(native_event,
EventTypeFromNative(native_event),
EventFlagsFromNative(native_event)),
location_(EventLocationFromNative(native_event)),
root_location_(location_) {}
LocatedEvent::LocatedEvent(EventType type,
const gfx::PointF& location,
const gfx::PointF& root_location,
base::TimeTicks time_stamp,
int flags)
: Event(type, time_stamp, flags),
location_(location),
root_location_(root_location) {}
LocatedEvent::LocatedEvent(const LocatedEvent& copy) = default;
void LocatedEvent::UpdateForRootTransform(
const gfx::Transform& reversed_root_transform,
const gfx::Transform& reversed_local_transform) {
if (target()) {
gfx::Point3F transformed_location(location_);
reversed_local_transform.TransformPoint(&transformed_location);
location_ = transformed_location.AsPointF();
gfx::Point3F transformed_root_location(root_location_);
reversed_root_transform.TransformPoint(&transformed_root_location);
root_location_ = transformed_root_location.AsPointF();
} else {
// This mirrors what the code previously did.
gfx::Point3F transformed_location(location_);
reversed_root_transform.TransformPoint(&transformed_location);
root_location_ = location_ = transformed_location.AsPointF();
}
}
////////////////////////////////////////////////////////////////////////////////
// PointerDetails
PointerDetails::PointerDetails() {}
PointerDetails::PointerDetails(EventPointerType pointer_type,
PointerId pointer_id)
: PointerDetails(pointer_type,
pointer_id,
/* radius_x */ 0.0f,
/* radius_y */ 0.0f,
/* force */ std::numeric_limits<float>::quiet_NaN()) {}
PointerDetails::PointerDetails(EventPointerType pointer_type,
PointerId pointer_id,
float radius_x,
float radius_y,
float force,
float twist,
float tilt_x,
float tilt_y,
float tangential_pressure)
: pointer_type(pointer_type),
// If we aren't provided with a radius on one axis, use the
// information from the other axis.
radius_x(radius_x > 0 ? radius_x : radius_y),
radius_y(radius_y > 0 ? radius_y : radius_x),
force(force),
tilt_x(tilt_x),
tilt_y(tilt_y),
tangential_pressure(tangential_pressure),
twist(twist),
id(pointer_id) {
if (pointer_id == PointerDetails::kUnknownPointerId) {
id = pointer_type == EventPointerType::POINTER_TYPE_MOUSE
? MouseEvent::kMousePointerId
: 0;
}
}
PointerDetails::PointerDetails(EventPointerType pointer_type,
const gfx::Vector2d& pointer_offset,
PointerId pointer_id)
: PointerDetails(pointer_type, pointer_id) {
offset = pointer_offset;
}
PointerDetails::PointerDetails(const PointerDetails& other) = default;
const PointerId PointerDetails::kUnknownPointerId = -1;
////////////////////////////////////////////////////////////////////////////////
// MouseEvent
MouseEvent::MouseEvent(const PlatformEvent& native_event)
: LocatedEvent(native_event),
changed_button_flags_(GetChangedMouseButtonFlagsFromNative(native_event)),
pointer_details_(GetMousePointerDetailsFromNative(native_event)) {
latency()->set_source_event_type(ui::SourceEventType::MOUSE);
latency()->AddLatencyNumberWithTimestamp(
INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT, time_stamp(), 1);
latency()->AddLatencyNumber(INPUT_EVENT_LATENCY_UI_COMPONENT);
if (type() == ET_MOUSE_PRESSED || type() == ET_MOUSE_RELEASED)
SetClickCount(GetRepeatCount(*this));
}
MouseEvent::MouseEvent(EventType type,
const gfx::Point& location,
const gfx::Point& root_location,
base::TimeTicks time_stamp,
int flags,
int changed_button_flags,
const PointerDetails& pointer_details)
: LocatedEvent(type,
gfx::PointF(location),
gfx::PointF(root_location),
time_stamp,
flags),
changed_button_flags_(changed_button_flags),
pointer_details_(pointer_details) {
DCHECK_NE(ET_MOUSEWHEEL, type);
DCHECK_EQ(changed_button_flags_,
changed_button_flags_ & kChangedButtonFlagMask);
latency()->set_source_event_type(ui::SourceEventType::MOUSE);
latency()->AddLatencyNumber(INPUT_EVENT_LATENCY_UI_COMPONENT);
if (this->type() == ET_MOUSE_MOVED && IsAnyButton())
SetType(ET_MOUSE_DRAGGED);
}
MouseEvent::MouseEvent(const MouseEvent& other) = default;
MouseEvent::~MouseEvent() = default;
// static
bool MouseEvent::IsRepeatedClickEvent(const MouseEvent& event1,
const MouseEvent& event2) {
// These values match the Windows defaults.
static const int kDoubleClickTimeMS = 500;
static const int kDoubleClickWidth = 4;
static const int kDoubleClickHeight = 4;
if (event1.type() != ET_MOUSE_PRESSED ||
event2.type() != ET_MOUSE_PRESSED)
return false;
// Compare flags, but ignore EF_IS_DOUBLE_CLICK to allow triple clicks.
if ((event1.flags() & ~EF_IS_DOUBLE_CLICK) !=
(event2.flags() & ~EF_IS_DOUBLE_CLICK))
return false;
// The new event has been created from the same native event.
if (event1.time_stamp() == event2.time_stamp())
return false;
base::TimeDelta time_difference = event2.time_stamp() - event1.time_stamp();
if (time_difference.InMilliseconds() > kDoubleClickTimeMS)
return false;
if (std::abs(event2.x() - event1.x()) > kDoubleClickWidth / 2)
return false;
if (std::abs(event2.y() - event1.y()) > kDoubleClickHeight / 2)
return false;
return true;
}
// static
int MouseEvent::GetRepeatCount(const MouseEvent& event) {
int click_count = 1;
if (last_click_event_) {
if (event.type() == ui::ET_MOUSE_RELEASED) {
if (event.changed_button_flags() ==
last_click_event_->changed_button_flags()) {
return last_click_event_->GetClickCount();
} else {
// If last_click_event_ has changed since this button was pressed
// return a click count of 1.
return click_count;
}
}
// Return the prior click count and do not update |last_click_event_| when
// re-processing a native event, or when proccesing a reposted event.
if (event.time_stamp() == last_click_event_->time_stamp())
return last_click_event_->GetClickCount();
if (IsRepeatedClickEvent(*last_click_event_, event))
click_count = last_click_event_->GetClickCount() + 1;
delete last_click_event_;
}
last_click_event_ = new MouseEvent(event);
if (click_count > 3)
click_count = 3;
last_click_event_->SetClickCount(click_count);
return click_count;
}
void MouseEvent::ResetLastClickForTest() {
if (last_click_event_) {
delete last_click_event_;
last_click_event_ = NULL;
}
}
// static
MouseEvent* MouseEvent::last_click_event_ = NULL;
int MouseEvent::GetClickCount() const {
if (type() != ET_MOUSE_PRESSED && type() != ET_MOUSE_RELEASED)
return 0;
if (flags() & EF_IS_TRIPLE_CLICK)
return 3;
else if (flags() & EF_IS_DOUBLE_CLICK)
return 2;
else
return 1;
}
void MouseEvent::SetClickCount(int click_count) {
if (type() != ET_MOUSE_PRESSED && type() != ET_MOUSE_RELEASED)
return;
DCHECK_LT(0, click_count);
DCHECK_GE(3, click_count);
int f = flags();
switch (click_count) {
case 1:
f &= ~EF_IS_DOUBLE_CLICK;
f &= ~EF_IS_TRIPLE_CLICK;
break;
case 2:
f |= EF_IS_DOUBLE_CLICK;
f &= ~EF_IS_TRIPLE_CLICK;
break;
case 3:
f &= ~EF_IS_DOUBLE_CLICK;
f |= EF_IS_TRIPLE_CLICK;
break;
}
set_flags(f);
}
const PointerId MouseEvent::kMousePointerId =
std::numeric_limits<PointerId>::max();
////////////////////////////////////////////////////////////////////////////////
// MouseWheelEvent
MouseWheelEvent::MouseWheelEvent(const PlatformEvent& native_event)
: MouseEvent(native_event), offset_(GetMouseWheelOffset(native_event)) {}
MouseWheelEvent::MouseWheelEvent(const ScrollEvent& scroll_event)
: MouseEvent(scroll_event),
offset_(gfx::ToRoundedInt(scroll_event.x_offset()),
gfx::ToRoundedInt(scroll_event.y_offset())) {
SetType(ET_MOUSEWHEEL);
}
MouseWheelEvent::MouseWheelEvent(const MouseEvent& mouse_event,
int x_offset,
int y_offset)
: MouseEvent(mouse_event), offset_(x_offset, y_offset) {
SetType(ET_MOUSEWHEEL);
}
MouseWheelEvent::MouseWheelEvent(const MouseWheelEvent& mouse_wheel_event)
: MouseEvent(mouse_wheel_event),
offset_(mouse_wheel_event.offset()) {
DCHECK_EQ(ET_MOUSEWHEEL, type());
}
MouseWheelEvent::MouseWheelEvent(const gfx::Vector2d& offset,
const gfx::Point& location,
const gfx::Point& root_location,
base::TimeTicks time_stamp,
int flags,
int changed_button_flags)
: MouseEvent(ui::ET_UNKNOWN,
location,
root_location,
time_stamp,
flags,
changed_button_flags),
offset_(offset) {
// Set event type to ET_UNKNOWN initially in MouseEvent() to pass the
// DCHECK for type to enforce that we use MouseWheelEvent() to create
// a MouseWheelEvent.
SetType(ui::ET_MOUSEWHEEL);
}
MouseWheelEvent::~MouseWheelEvent() = default;
#if defined(OS_WIN)
// This value matches windows WHEEL_DELTA.
// static
const int MouseWheelEvent::kWheelDelta = 120;
#else
// This value matches GTK+ wheel scroll amount.
const int MouseWheelEvent::kWheelDelta = 53;
#endif
////////////////////////////////////////////////////////////////////////////////
// TouchEvent
TouchEvent::TouchEvent(const PlatformEvent& native_event)
: LocatedEvent(native_event),
unique_event_id_(ui::GetNextTouchEventId()),
may_cause_scrolling_(false),
should_remove_native_touch_id_mapping_(false),
hovering_(false),
pointer_details_(GetTouchPointerDetailsFromNative(native_event)) {
latency()->AddLatencyNumberWithTimestamp(
INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT, time_stamp(), 1);
latency()->AddLatencyNumber(INPUT_EVENT_LATENCY_UI_COMPONENT);
if (type() == ET_TOUCH_RELEASED || type() == ET_TOUCH_CANCELLED)
should_remove_native_touch_id_mapping_ = true;
}
TouchEvent::TouchEvent(EventType type,
const gfx::Point& location,
base::TimeTicks time_stamp,
const PointerDetails& pointer_details,
int flags)
: LocatedEvent(type,
gfx::PointF(location),
gfx::PointF(location),
time_stamp,
flags),
unique_event_id_(ui::GetNextTouchEventId()),
may_cause_scrolling_(false),
should_remove_native_touch_id_mapping_(false),
hovering_(false),
pointer_details_(pointer_details) {
latency()->AddLatencyNumber(INPUT_EVENT_LATENCY_UI_COMPONENT);
}
TouchEvent::TouchEvent(const TouchEvent& copy)
: LocatedEvent(copy),
unique_event_id_(copy.unique_event_id_),
may_cause_scrolling_(copy.may_cause_scrolling_),
should_remove_native_touch_id_mapping_(false),
hovering_(copy.hovering_),
pointer_details_(copy.pointer_details_) {
// Copied events should not remove touch id mapping, as this either causes the
// mapping to be lost before the initial event has finished dispatching, or
// the copy to attempt to remove the mapping from a null |native_event_|.
}
TouchEvent::~TouchEvent() {
// In ctor TouchEvent(native_event) we call GetTouchId() which in X11
// platform setups the tracking_id to slot mapping. So in dtor here,
// if this touch event is a release event, we clear the mapping accordingly.
if (should_remove_native_touch_id_mapping_) {
DCHECK(type() == ET_TOUCH_RELEASED || type() == ET_TOUCH_CANCELLED);
if (type() == ET_TOUCH_RELEASED || type() == ET_TOUCH_CANCELLED)
ClearTouchIdIfReleased(native_event());
}
}
void TouchEvent::UpdateForRootTransform(
const gfx::Transform& inverted_root_transform,
const gfx::Transform& inverted_local_transform) {
LocatedEvent::UpdateForRootTransform(inverted_root_transform,
inverted_local_transform);
gfx::DecomposedTransform decomp;
bool success = gfx::DecomposeTransform(&decomp, inverted_root_transform);
DCHECK(success);
if (decomp.scale[0])
pointer_details_.radius_x *= decomp.scale[0];
if (decomp.scale[1])
pointer_details_.radius_y *= decomp.scale[1];
}
void TouchEvent::DisableSynchronousHandling() {
DispatcherApi dispatcher_api(this);
dispatcher_api.set_result(
static_cast<EventResult>(result() | ER_DISABLE_SYNC_HANDLING));
}
void TouchEvent::SetPointerDetailsForTest(
const PointerDetails& pointer_details) {
DCHECK_EQ(pointer_details_.id, pointer_details.id);
pointer_details_ = pointer_details;
}
float TouchEvent::ComputeRotationAngle() const {
float rotation_angle = pointer_details_.twist;
while (rotation_angle < 0)
rotation_angle += 180.f;
while (rotation_angle >= 180)
rotation_angle -= 180.f;
return rotation_angle;
}
////////////////////////////////////////////////////////////////////////////////
// KeyEvent
// static
KeyEvent* KeyEvent::last_key_event_ = nullptr;
#if defined(USE_X11)
KeyEvent* KeyEvent::last_ibus_key_event_ = nullptr;
#endif
// static
bool KeyEvent::IsRepeated(const KeyEvent& event) {
// A safe guard in case if there were continous key pressed events that are
// not auto repeat.
const int kMaxAutoRepeatTimeMs = 2000;
KeyEvent** last_key_event;
#if defined(USE_X11)
// Use a different static variable for key events that have non standard
// state masks as it may be reposted by an IME. IBUS-GTK uses this field
// to detect the re-posted event for example. crbug.com/385873.
last_key_event = X11EventHasNonStandardState(event.native_event())
? &last_ibus_key_event_
: &last_key_event_;
#else
last_key_event = &last_key_event_;
#endif
if (event.is_char())
return false;
if (event.type() == ui::ET_KEY_RELEASED) {
delete *last_key_event;
*last_key_event = nullptr;
return false;
}
CHECK_EQ(ui::ET_KEY_PRESSED, event.type());
if (!(*last_key_event)) {
*last_key_event = new KeyEvent(event);
return false;
} else if (event.time_stamp() == (*last_key_event)->time_stamp()) {
// The KeyEvent is created from the same native event.
return ((*last_key_event)->flags() & ui::EF_IS_REPEAT) != 0;
}
DCHECK(*last_key_event);
bool is_repeat = false;
#if defined(OS_WIN)
if (event.HasNativeEvent()) {
// Bit 30 of lParam represents the "previous key state". If set, the key
// was already down, therefore this is an auto-repeat.
is_repeat = (event.native_event().lParam & 0x40000000) != 0;
}
#endif
if (!is_repeat) {
if (event.key_code() == (*last_key_event)->key_code() &&
event.flags() == ((*last_key_event)->flags() & ~ui::EF_IS_REPEAT) &&
(event.time_stamp() - (*last_key_event)->time_stamp())
.InMilliseconds() < kMaxAutoRepeatTimeMs) {
is_repeat = true;
}
}
if (is_repeat) {
(*last_key_event)->set_time_stamp(event.time_stamp());
(*last_key_event)->set_flags((*last_key_event)->flags() | ui::EF_IS_REPEAT);
return true;
}
delete *last_key_event;
*last_key_event = new KeyEvent(event);
return false;
}
KeyEvent::KeyEvent(const PlatformEvent& native_event)
: KeyEvent(native_event, EventFlagsFromNative(native_event)) {}
KeyEvent::KeyEvent(const PlatformEvent& native_event, int event_flags)
: Event(native_event, EventTypeFromNative(native_event), event_flags),
key_code_(KeyboardCodeFromNative(native_event)),
code_(CodeFromNative(native_event)),
is_char_(IsCharFromNative(native_event)) {
latency()->AddLatencyNumberWithTimestamp(
INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT, time_stamp(), 1);
latency()->AddLatencyNumber(INPUT_EVENT_LATENCY_UI_COMPONENT);
if (IsRepeated(*this))
set_flags(flags() | ui::EF_IS_REPEAT);
#if defined(USE_X11)
NormalizeFlags();
#endif
#if defined(OS_WIN)
// Only Windows has native character events.
if (is_char_) {
key_ = DomKey::FromCharacter(static_cast<int32_t>(native_event.wParam));
set_flags(PlatformKeyMap::ReplaceControlAndAltWithAltGraph(flags()));
} else {
int adjusted_flags = flags();
key_ = PlatformKeyMap::DomKeyFromKeyboardCode(key_code(), &adjusted_flags);
set_flags(adjusted_flags);
}
#endif
}
KeyEvent::KeyEvent(EventType type,
KeyboardCode key_code,
int flags,
base::TimeTicks time_stamp)
: Event(type,
time_stamp == base::TimeTicks() ? EventTimeForNow() : time_stamp,
flags),
key_code_(key_code),
code_(UsLayoutKeyboardCodeToDomCode(key_code)) {}
KeyEvent::KeyEvent(EventType type,
KeyboardCode key_code,
DomCode code,
int flags)
: Event(type, EventTimeForNow(), flags),
key_code_(key_code),
code_(code) {
}
KeyEvent::KeyEvent(EventType type,
KeyboardCode key_code,
DomCode code,
int flags,
DomKey key,
base::TimeTicks time_stamp)
: Event(type, time_stamp, flags),
key_code_(key_code),
code_(code),
key_(key) {}
KeyEvent::KeyEvent(base::char16 character,
KeyboardCode key_code,
DomCode code,
int flags,
base::TimeTicks time_stamp)
: Event(ET_KEY_PRESSED,
time_stamp == base::TimeTicks() ? EventTimeForNow() : time_stamp,
flags),
key_code_(key_code),
code_(code),
is_char_(true),
key_(DomKey::FromCharacter(character)) {}
KeyEvent::KeyEvent(const KeyEvent& rhs)
: Event(rhs),
key_code_(rhs.key_code_),
code_(rhs.code_),
is_char_(rhs.is_char_),
key_(rhs.key_) {}
KeyEvent& KeyEvent::operator=(const KeyEvent& rhs) {
if (this != &rhs) {
Event::operator=(rhs);
key_code_ = rhs.key_code_;
code_ = rhs.code_;
key_ = rhs.key_;
is_char_ = rhs.is_char_;
}
return *this;
}
KeyEvent::~KeyEvent() {}
void KeyEvent::ApplyLayout() const {
ui::DomCode code = code_;
if (code == DomCode::NONE) {
// Catch old code that tries to do layout without a physical key, and try
// to recover using the KeyboardCode. Once key events are fully defined
// on construction (see TODO in event.h) this will go away.
VLOG(2) << "DomCode::NONE keycode=" << key_code_;
code = UsLayoutKeyboardCodeToDomCode(key_code_);
if (code == DomCode::NONE) {
key_ = DomKey::UNIDENTIFIED;
return;
}
}
KeyboardCode dummy_key_code;
#if defined(OS_WIN)
// Native Windows character events always have is_char_ == true,
// so this is a synthetic or native keystroke event.
// Therefore, perform only the fallback action.
#elif defined(USE_X11)
if (native_event()) {
key_ = GetDomKeyFromXEvent(native_event());
return;
}
#elif defined(USE_OZONE)
if (KeyboardLayoutEngineManager::GetKeyboardLayoutEngine()->Lookup(
code, flags(), &key_, &dummy_key_code)) {
return;
}
#else
if (native_event()) {
DCHECK(EventTypeFromNative(native_event()) == ET_KEY_PRESSED ||
EventTypeFromNative(native_event()) == ET_KEY_RELEASED);
}
#endif
if (!DomCodeToUsLayoutDomKey(code, flags(), &key_, &dummy_key_code))
key_ = DomKey::UNIDENTIFIED;
}
DomKey KeyEvent::GetDomKey() const {
// Determination of key_ may be done lazily.
if (key_ == DomKey::NONE)
ApplyLayout();
return key_;
}
base::char16 KeyEvent::GetCharacter() const {
// Determination of key_ may be done lazily.
if (key_ == DomKey::NONE)
ApplyLayout();
if (key_.IsCharacter()) {
// Historically ui::KeyEvent has held only BMP characters.
// Until this explicitly changes, require |key_| to hold a BMP character.
DomKey::Base utf32_character = key_.ToCharacter();
base::char16 ucs2_character = static_cast<base::char16>(utf32_character);
DCHECK_EQ(static_cast<DomKey::Base>(ucs2_character), utf32_character);
// Check if the control character is down. Note that ALTGR is represented
// on Windows as CTRL|ALT, so we need to make sure that is not set.