| // Copyright 2013 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/blink/input_handler_proxy.h" |
| |
| #include <stddef.h> |
| |
| #include <algorithm> |
| |
| #include "base/auto_reset.h" |
| #include "base/command_line.h" |
| #include "base/location.h" |
| #include "base/logging.h" |
| #include "base/metrics/histogram_macros.h" |
| #include "base/single_thread_task_runner.h" |
| #include "base/threading/thread_task_runner_handle.h" |
| #include "base/time/default_tick_clock.h" |
| #include "base/trace_event/trace_event.h" |
| #include "cc/input/main_thread_scrolling_reason.h" |
| #include "third_party/blink/public/platform/web_input_event.h" |
| #include "third_party/blink/public/platform/web_mouse_wheel_event.h" |
| #include "third_party/blink/public/platform/web_touch_event.h" |
| #include "ui/events/blink/blink_event_util.h" |
| #include "ui/events/blink/compositor_thread_event_queue.h" |
| #include "ui/events/blink/did_overscroll_params.h" |
| #include "ui/events/blink/event_with_callback.h" |
| #include "ui/events/blink/input_handler_proxy_client.h" |
| #include "ui/events/blink/input_scroll_elasticity_controller.h" |
| #include "ui/events/blink/scroll_predictor.h" |
| #include "ui/events/blink/web_input_event_traits.h" |
| #include "ui/gfx/geometry/point_conversions.h" |
| #include "ui/latency/latency_info.h" |
| |
| using blink::WebGestureEvent; |
| using blink::WebInputEvent; |
| using blink::WebMouseEvent; |
| using blink::WebMouseWheelEvent; |
| using blink::WebTouchEvent; |
| using blink::WebTouchPoint; |
| |
| namespace { |
| |
| const int32_t kEventDispositionUndefined = -1; |
| |
| cc::ScrollState CreateScrollStateForGesture(const WebGestureEvent& event) { |
| cc::ScrollStateData scroll_state_data; |
| switch (event.GetType()) { |
| case WebInputEvent::kGestureScrollBegin: |
| scroll_state_data.position_x = event.PositionInWidget().x; |
| scroll_state_data.position_y = event.PositionInWidget().y; |
| scroll_state_data.delta_x_hint = -event.data.scroll_begin.delta_x_hint; |
| scroll_state_data.delta_y_hint = -event.data.scroll_begin.delta_y_hint; |
| scroll_state_data.is_beginning = true; |
| // On Mac, a GestureScrollBegin in the inertial phase indicates a fling |
| // start. |
| scroll_state_data.is_in_inertial_phase = |
| (event.data.scroll_begin.inertial_phase == |
| WebGestureEvent::kMomentumPhase); |
| break; |
| case WebInputEvent::kGestureScrollUpdate: |
| scroll_state_data.delta_x = -event.data.scroll_update.delta_x; |
| scroll_state_data.delta_y = -event.data.scroll_update.delta_y; |
| scroll_state_data.velocity_x = event.data.scroll_update.velocity_x; |
| scroll_state_data.velocity_y = event.data.scroll_update.velocity_y; |
| scroll_state_data.is_in_inertial_phase = |
| event.data.scroll_update.inertial_phase == |
| WebGestureEvent::kMomentumPhase; |
| break; |
| case WebInputEvent::kGestureScrollEnd: |
| scroll_state_data.is_ending = true; |
| break; |
| default: |
| NOTREACHED(); |
| break; |
| } |
| return cc::ScrollState(scroll_state_data); |
| } |
| |
| cc::ScrollState CreateScrollStateForInertialEnd() { |
| cc::ScrollStateData scroll_state_data; |
| scroll_state_data.is_ending = true; |
| return cc::ScrollState(scroll_state_data); |
| } |
| |
| cc::ScrollState CreateScrollStateForInertialUpdate( |
| const gfx::Vector2dF& delta) { |
| cc::ScrollStateData scroll_state_data; |
| scroll_state_data.delta_x = delta.x(); |
| scroll_state_data.delta_y = delta.y(); |
| scroll_state_data.is_in_inertial_phase = true; |
| return cc::ScrollState(scroll_state_data); |
| } |
| |
| cc::InputHandler::ScrollInputType GestureScrollInputType( |
| blink::WebGestureDevice device) { |
| return device == blink::kWebGestureDeviceTouchpad |
| ? cc::InputHandler::WHEEL |
| : cc::InputHandler::TOUCHSCREEN; |
| } |
| |
| cc::SnapFlingController::GestureScrollType GestureScrollEventType( |
| WebInputEvent::Type web_event_type) { |
| switch (web_event_type) { |
| case WebInputEvent::kGestureScrollBegin: |
| return cc::SnapFlingController::GestureScrollType::kBegin; |
| case WebInputEvent::kGestureScrollUpdate: |
| return cc::SnapFlingController::GestureScrollType::kUpdate; |
| case WebInputEvent::kGestureScrollEnd: |
| return cc::SnapFlingController::GestureScrollType::kEnd; |
| default: |
| NOTREACHED(); |
| return cc::SnapFlingController::GestureScrollType::kBegin; |
| } |
| } |
| |
| cc::SnapFlingController::GestureScrollUpdateInfo GetGestureScrollUpdateInfo( |
| const WebGestureEvent& event) { |
| cc::SnapFlingController::GestureScrollUpdateInfo info; |
| info.delta = gfx::Vector2dF(-event.data.scroll_update.delta_x, |
| -event.data.scroll_update.delta_y); |
| info.is_in_inertial_phase = event.data.scroll_update.inertial_phase == |
| blink::WebGestureEvent::kMomentumPhase; |
| info.event_time = event.TimeStamp(); |
| return info; |
| } |
| |
| enum ScrollingThreadStatus { |
| SCROLLING_ON_COMPOSITOR, |
| SCROLLING_ON_COMPOSITOR_BLOCKED_ON_MAIN, |
| SCROLLING_ON_MAIN, |
| LAST_SCROLLING_THREAD_STATUS_VALUE = SCROLLING_ON_MAIN, |
| }; |
| |
| } // namespace |
| |
| namespace ui { |
| |
| InputHandlerProxy::InputHandlerProxy(cc::InputHandler* input_handler, |
| InputHandlerProxyClient* client) |
| : client_(client), |
| input_handler_(input_handler), |
| synchronous_input_handler_(nullptr), |
| allow_root_animate_(true), |
| #if DCHECK_IS_ON() |
| expect_scroll_update_end_(false), |
| #endif |
| gesture_scroll_on_impl_thread_(false), |
| scroll_sequence_ignored_(false), |
| smooth_scroll_enabled_(false), |
| touch_result_(kEventDispositionUndefined), |
| mouse_wheel_result_(kEventDispositionUndefined), |
| current_overscroll_params_(nullptr), |
| has_ongoing_compositor_scroll_or_pinch_(false), |
| is_first_gesture_scroll_update_(false), |
| tick_clock_(base::DefaultTickClock::GetInstance()), |
| snap_fling_controller_(std::make_unique<cc::SnapFlingController>(this)), |
| compositor_touch_action_enabled_( |
| base::FeatureList::IsEnabled(features::kCompositorTouchAction)) { |
| DCHECK(client); |
| input_handler_->BindToClient(this); |
| cc::ScrollElasticityHelper* scroll_elasticity_helper = |
| input_handler_->CreateScrollElasticityHelper(); |
| if (scroll_elasticity_helper) { |
| scroll_elasticity_controller_.reset( |
| new InputScrollElasticityController(scroll_elasticity_helper)); |
| } |
| compositor_event_queue_ = std::make_unique<CompositorThreadEventQueue>(); |
| scroll_predictor_ = std::make_unique<ScrollPredictor>( |
| base::FeatureList::IsEnabled(features::kResamplingScrollEvents)); |
| } |
| |
| InputHandlerProxy::~InputHandlerProxy() {} |
| |
| void InputHandlerProxy::WillShutdown() { |
| scroll_elasticity_controller_.reset(); |
| input_handler_ = NULL; |
| client_->WillShutdown(); |
| } |
| |
| void InputHandlerProxy::HandleInputEventWithLatencyInfo( |
| WebScopedInputEvent event, |
| const LatencyInfo& latency_info, |
| EventDispositionCallback callback) { |
| DCHECK(input_handler_); |
| |
| TRACE_EVENT_WITH_FLOW1("input,benchmark", "LatencyInfo.Flow", |
| TRACE_ID_DONT_MANGLE(latency_info.trace_id()), |
| TRACE_EVENT_FLAG_FLOW_IN | TRACE_EVENT_FLAG_FLOW_OUT, |
| "step", "HandleInputEventImpl"); |
| |
| std::unique_ptr<EventWithCallback> event_with_callback = |
| std::make_unique<EventWithCallback>(std::move(event), latency_info, |
| tick_clock_->NowTicks(), |
| std::move(callback)); |
| |
| // Note: Other input can race ahead of gesture input as they don't have to go |
| // through the queue, but we believe it's OK to do so. |
| if (!IsGestureScrollOrPinch(event_with_callback->event().GetType())) { |
| DispatchSingleInputEvent(std::move(event_with_callback), |
| tick_clock_->NowTicks()); |
| return; |
| } |
| |
| if (has_ongoing_compositor_scroll_or_pinch_) { |
| const auto& gesture_event = ToWebGestureEvent(event_with_callback->event()); |
| bool is_from_set_non_blocking_touch = |
| gesture_event.SourceDevice() == blink::kWebGestureDeviceTouchscreen && |
| gesture_event.is_source_touch_event_set_non_blocking; |
| bool is_scroll_end_from_wheel = |
| gesture_event.SourceDevice() == blink::kWebGestureDeviceTouchpad && |
| gesture_event.GetType() == blink::WebGestureEvent::kGestureScrollEnd; |
| bool scroll_update_has_blocking_wheel_source = |
| gesture_event.SourceDevice() == blink::kWebGestureDeviceTouchpad && |
| gesture_event.GetType() == |
| blink::WebGestureEvent::kGestureScrollUpdate && |
| is_first_gesture_scroll_update_; |
| if (gesture_event.GetType() == |
| blink::WebGestureEvent::kGestureScrollUpdate) { |
| is_first_gesture_scroll_update_ = false; |
| } |
| if (is_from_set_non_blocking_touch || is_scroll_end_from_wheel || |
| scroll_update_has_blocking_wheel_source || synchronous_input_handler_) { |
| // 1. Gesture events was already delayed by blocking events in rAF aligned |
| // queue. We want to avoid additional one frame delay by flushing the |
| // VSync queue immediately. |
| // The first GSU latency was tracked by: |
| // |smoothness.tough_scrolling_cases:first_gesture_scroll_update_latency|. |
| // 2. |synchronous_input_handler_| is WebView only. WebView has different |
| // mechanisms and we want to forward all events immediately. |
| compositor_event_queue_->Queue(std::move(event_with_callback), |
| tick_clock_->NowTicks()); |
| DispatchQueuedInputEvents(); |
| return; |
| } |
| |
| bool needs_animate_input = compositor_event_queue_->empty(); |
| compositor_event_queue_->Queue(std::move(event_with_callback), |
| tick_clock_->NowTicks()); |
| if (needs_animate_input) |
| input_handler_->SetNeedsAnimateInput(); |
| return; |
| } |
| |
| // We have to dispatch the event to know whether the gesture sequence will be |
| // handled by the compositor or not. |
| DispatchSingleInputEvent(std::move(event_with_callback), |
| tick_clock_->NowTicks()); |
| } |
| |
| void InputHandlerProxy::DispatchSingleInputEvent( |
| std::unique_ptr<EventWithCallback> event_with_callback, |
| const base::TimeTicks now) { |
| ui::LatencyInfo monitored_latency_info = event_with_callback->latency_info(); |
| std::unique_ptr<cc::SwapPromiseMonitor> latency_info_swap_promise_monitor = |
| input_handler_->CreateLatencyInfoSwapPromiseMonitor( |
| &monitored_latency_info); |
| |
| current_overscroll_params_.reset(); |
| |
| InputHandlerProxy::EventDisposition disposition = |
| HandleInputEvent(event_with_callback->event()); |
| |
| switch (event_with_callback->event().GetType()) { |
| case blink::WebGestureEvent::kGestureScrollBegin: |
| is_first_gesture_scroll_update_ = true; |
| FALLTHROUGH; |
| case blink::WebGestureEvent::kGesturePinchBegin: |
| case blink::WebGestureEvent::kGestureScrollUpdate: |
| case blink::WebGestureEvent::kGesturePinchUpdate: |
| has_ongoing_compositor_scroll_or_pinch_ = disposition == DID_HANDLE; |
| break; |
| |
| case blink::WebGestureEvent::kGestureScrollEnd: |
| case blink::WebGestureEvent::kGesturePinchEnd: |
| has_ongoing_compositor_scroll_or_pinch_ = false; |
| break; |
| default: |
| break; |
| } |
| |
| // Will run callback for every original events. |
| event_with_callback->RunCallbacks(disposition, monitored_latency_info, |
| std::move(current_overscroll_params_)); |
| } |
| |
| void InputHandlerProxy::DispatchQueuedInputEvents() { |
| // Calling |NowTicks()| is expensive so we only want to do it once. |
| base::TimeTicks now = tick_clock_->NowTicks(); |
| while (!compositor_event_queue_->empty()) { |
| std::unique_ptr<EventWithCallback> event_with_callback = |
| compositor_event_queue_->Pop(); |
| if (scroll_predictor_) { |
| scroll_predictor_->ResampleScrollEvents( |
| event_with_callback->original_events(), now, |
| event_with_callback->event_pointer()); |
| } |
| |
| DispatchSingleInputEvent(std::move(event_with_callback), now); |
| } |
| } |
| |
| InputHandlerProxy::EventDisposition InputHandlerProxy::HandleInputEvent( |
| const WebInputEvent& event) { |
| DCHECK(input_handler_); |
| |
| if (IsGestureScroll(event.GetType()) && |
| (snap_fling_controller_->FilterEventForSnap( |
| GestureScrollEventType(event.GetType())))) { |
| return DROP_EVENT; |
| } |
| |
| switch (event.GetType()) { |
| case WebInputEvent::kMouseWheel: |
| return HandleMouseWheel(static_cast<const WebMouseWheelEvent&>(event)); |
| |
| case WebInputEvent::kGestureScrollBegin: |
| return HandleGestureScrollBegin( |
| static_cast<const WebGestureEvent&>(event)); |
| |
| case WebInputEvent::kGestureScrollUpdate: |
| return HandleGestureScrollUpdate( |
| static_cast<const WebGestureEvent&>(event)); |
| |
| case WebInputEvent::kGestureScrollEnd: |
| return HandleGestureScrollEnd(static_cast<const WebGestureEvent&>(event)); |
| |
| case WebInputEvent::kGesturePinchBegin: { |
| DCHECK(!gesture_pinch_in_progress_); |
| input_handler_->PinchGestureBegin(); |
| gesture_pinch_in_progress_ = true; |
| return DID_HANDLE; |
| } |
| |
| case WebInputEvent::kGesturePinchEnd: { |
| DCHECK(gesture_pinch_in_progress_); |
| gesture_pinch_in_progress_ = false; |
| const WebGestureEvent& gesture_event = |
| static_cast<const WebGestureEvent&>(event); |
| input_handler_->PinchGestureEnd( |
| gfx::ToFlooredPoint(gesture_event.PositionInWidget()), |
| gesture_event.SourceDevice() == blink::kWebGestureDeviceTouchpad); |
| return DID_HANDLE; |
| } |
| |
| case WebInputEvent::kGesturePinchUpdate: { |
| DCHECK(gesture_pinch_in_progress_); |
| const WebGestureEvent& gesture_event = |
| static_cast<const WebGestureEvent&>(event); |
| input_handler_->PinchGestureUpdate( |
| gesture_event.data.pinch_update.scale, |
| gfx::ToFlooredPoint(gesture_event.PositionInWidget())); |
| return DID_HANDLE; |
| } |
| |
| case WebInputEvent::kTouchStart: |
| return HandleTouchStart(static_cast<const WebTouchEvent&>(event)); |
| |
| case WebInputEvent::kTouchMove: |
| return HandleTouchMove(static_cast<const WebTouchEvent&>(event)); |
| |
| case WebInputEvent::kTouchEnd: |
| return HandleTouchEnd(static_cast<const WebTouchEvent&>(event)); |
| |
| case WebInputEvent::kMouseDown: { |
| // Only for check scrollbar captured |
| const WebMouseEvent& mouse_event = |
| static_cast<const WebMouseEvent&>(event); |
| |
| if (mouse_event.button == blink::WebMouseEvent::Button::kLeft) { |
| CHECK(input_handler_); |
| input_handler_->MouseDown(); |
| } |
| return DID_NOT_HANDLE; |
| } |
| case WebInputEvent::kMouseUp: { |
| // Only for release scrollbar captured |
| const WebMouseEvent& mouse_event = |
| static_cast<const WebMouseEvent&>(event); |
| |
| if (mouse_event.button == blink::WebMouseEvent::Button::kLeft) { |
| CHECK(input_handler_); |
| input_handler_->MouseUp(); |
| } |
| return DID_NOT_HANDLE; |
| } |
| case WebInputEvent::kMouseMove: { |
| const WebMouseEvent& mouse_event = |
| static_cast<const WebMouseEvent&>(event); |
| // TODO(davemoore): This should never happen, but bug #326635 showed some |
| // surprising crashes. |
| CHECK(input_handler_); |
| input_handler_->MouseMoveAt(gfx::Point(mouse_event.PositionInWidget().x, |
| mouse_event.PositionInWidget().y)); |
| return DID_NOT_HANDLE; |
| } |
| case WebInputEvent::kMouseLeave: { |
| CHECK(input_handler_); |
| input_handler_->MouseLeave(); |
| return DID_NOT_HANDLE; |
| } |
| // Fling gestures are handled only in the browser process and not sent to |
| // the renderer. |
| case WebInputEvent::kGestureFlingStart: |
| case WebInputEvent::kGestureFlingCancel: |
| NOTREACHED(); |
| break; |
| |
| default: |
| break; |
| } |
| |
| return DID_NOT_HANDLE; |
| } |
| |
| void InputHandlerProxy::RecordMainThreadScrollingReasons( |
| blink::WebGestureDevice device, |
| uint32_t reasons) { |
| static const char* kGestureHistogramName = |
| "Renderer4.MainThreadGestureScrollReason"; |
| static const char* kWheelHistogramName = |
| "Renderer4.MainThreadWheelScrollReason"; |
| |
| if (device != blink::kWebGestureDeviceTouchpad && |
| device != blink::kWebGestureDeviceTouchscreen) { |
| return; |
| } |
| |
| // NonCompositedScrollReasons should only be set on the main thread. |
| DCHECK( |
| !cc::MainThreadScrollingReason::HasNonCompositedScrollReasons(reasons)); |
| |
| int32_t event_disposition_result = |
| (device == blink::kWebGestureDeviceTouchpad ? mouse_wheel_result_ |
| : touch_result_); |
| if (event_disposition_result == DID_NOT_HANDLE) { |
| // We should also collect main thread scrolling reasons if a scroll event |
| // scrolls on impl thread but is blocked by main thread event handlers. |
| reasons |= (device == blink::kWebGestureDeviceTouchpad |
| ? cc::MainThreadScrollingReason::kWheelEventHandlerRegion |
| : cc::MainThreadScrollingReason::kTouchEventHandlerRegion); |
| } |
| |
| // UMA_HISTOGRAM_ENUMERATION requires that the enum_max must be strictly |
| // greater than the sample value. kMainThreadScrollingReasonCount doesn't |
| // include the NotScrollingOnMain enum but the histograms do so adding |
| // the +1 is necessary. |
| // TODO(dcheng): Fix https://crbug.com/705169 so this isn't needed. |
| constexpr uint32_t kMainThreadScrollingReasonEnumMax = |
| cc::MainThreadScrollingReason::kMainThreadScrollingReasonCount + 1; |
| if (reasons == cc::MainThreadScrollingReason::kNotScrollingOnMain) { |
| if (device == blink::kWebGestureDeviceTouchscreen) { |
| UMA_HISTOGRAM_ENUMERATION( |
| kGestureHistogramName, |
| cc::MainThreadScrollingReason::kNotScrollingOnMain, |
| kMainThreadScrollingReasonEnumMax); |
| } else { |
| UMA_HISTOGRAM_ENUMERATION( |
| kWheelHistogramName, |
| cc::MainThreadScrollingReason::kNotScrollingOnMain, |
| kMainThreadScrollingReasonEnumMax); |
| } |
| } |
| |
| for (uint32_t i = 0; |
| i < cc::MainThreadScrollingReason::kMainThreadScrollingReasonCount; |
| ++i) { |
| unsigned val = 1 << i; |
| if (reasons & val) { |
| if (val == cc::MainThreadScrollingReason::kHandlingScrollFromMainThread) { |
| // We only want to record "Handling scroll from main thread" reason if |
| // it's the only reason. If it's not the only reason, the "real" reason |
| // for scrolling on main is something else, and we only want to pay |
| // attention to that reason. |
| if (reasons & ~val) |
| continue; |
| } |
| if (device == blink::kWebGestureDeviceTouchscreen) { |
| UMA_HISTOGRAM_ENUMERATION(kGestureHistogramName, i + 1, |
| kMainThreadScrollingReasonEnumMax); |
| } else { |
| UMA_HISTOGRAM_ENUMERATION(kWheelHistogramName, i + 1, |
| kMainThreadScrollingReasonEnumMax); |
| } |
| } |
| } |
| } |
| |
| bool InputHandlerProxy::ShouldAnimate(bool has_precise_scroll_deltas) const { |
| #if defined(OS_MACOSX) |
| // Mac does not smooth scroll wheel events (crbug.com/574283). |
| return false; |
| #else |
| return smooth_scroll_enabled_ && !has_precise_scroll_deltas; |
| #endif |
| } |
| |
| InputHandlerProxy::EventDisposition InputHandlerProxy::HandleMouseWheel( |
| const WebMouseWheelEvent& wheel_event) { |
| InputHandlerProxy::EventDisposition result = DROP_EVENT; |
| |
| if (wheel_event.dispatch_type == WebInputEvent::kEventNonBlocking) { |
| // The first wheel event in the sequence should be cancellable. |
| DCHECK(wheel_event.phase != WebMouseWheelEvent::kPhaseBegan); |
| // Noncancellable wheel events should have phase info. |
| DCHECK(wheel_event.phase != WebMouseWheelEvent::kPhaseNone || |
| wheel_event.momentum_phase != WebMouseWheelEvent::kPhaseNone); |
| |
| result = static_cast<EventDisposition>(mouse_wheel_result_); |
| |
| if (wheel_event.phase == WebMouseWheelEvent::kPhaseEnded || |
| wheel_event.phase == WebMouseWheelEvent::kPhaseCancelled || |
| wheel_event.momentum_phase == WebMouseWheelEvent::kPhaseEnded || |
| wheel_event.momentum_phase == WebMouseWheelEvent::kPhaseCancelled) { |
| mouse_wheel_result_ = kEventDispositionUndefined; |
| } |
| if (mouse_wheel_result_ != kEventDispositionUndefined) |
| return result; |
| } |
| |
| blink::WebFloatPoint position_in_widget = wheel_event.PositionInWidget(); |
| if (input_handler_->HasBlockingWheelEventHandlerAt( |
| gfx::Point(position_in_widget.x, position_in_widget.y))) { |
| result = DID_NOT_HANDLE; |
| } else { |
| cc::EventListenerProperties properties = |
| input_handler_->GetEventListenerProperties( |
| cc::EventListenerClass::kMouseWheel); |
| switch (properties) { |
| case cc::EventListenerProperties::kBlockingAndPassive: |
| case cc::EventListenerProperties::kPassive: |
| result = DID_HANDLE_NON_BLOCKING; |
| break; |
| case cc::EventListenerProperties::kNone: |
| result = DROP_EVENT; |
| break; |
| default: |
| // If properties is kBlocking, and the event falls outside wheel event |
| // handler region, we should handle it the same as kNone. |
| result = DROP_EVENT; |
| } |
| } |
| |
| mouse_wheel_result_ = result; |
| return result; |
| } |
| |
| InputHandlerProxy::EventDisposition InputHandlerProxy::HandleGestureScrollBegin( |
| const WebGestureEvent& gesture_event) { |
| TRACE_EVENT0("input", "InputHandlerProxy::HandleGestureScrollBegin"); |
| |
| if (scroll_predictor_) |
| scroll_predictor_->ResetOnGestureScrollBegin(gesture_event); |
| |
| #if DCHECK_IS_ON() |
| expect_scroll_update_end_ = true; |
| #endif |
| cc::ScrollState scroll_state = CreateScrollStateForGesture(gesture_event); |
| cc::InputHandler::ScrollStatus scroll_status; |
| if (gesture_event.data.scroll_begin.delta_hint_units == |
| blink::WebGestureEvent::ScrollUnits::kPage) { |
| scroll_status.thread = cc::InputHandler::SCROLL_ON_MAIN_THREAD; |
| scroll_status.main_thread_scrolling_reasons = |
| cc::MainThreadScrollingReason::kContinuingMainThreadScroll; |
| } else if (gesture_event.data.scroll_begin.target_viewport) { |
| scroll_status = input_handler_->RootScrollBegin( |
| &scroll_state, GestureScrollInputType(gesture_event.SourceDevice())); |
| } else if (ShouldAnimate(gesture_event.data.scroll_begin.delta_hint_units != |
| blink::WebGestureEvent::ScrollUnits::kPixels)) { |
| DCHECK(!scroll_state.is_in_inertial_phase()); |
| scroll_status = input_handler_->ScrollAnimatedBegin(&scroll_state); |
| } else { |
| scroll_status = input_handler_->ScrollBegin( |
| &scroll_state, GestureScrollInputType(gesture_event.SourceDevice())); |
| } |
| RecordMainThreadScrollingReasons(gesture_event.SourceDevice(), |
| scroll_status.main_thread_scrolling_reasons); |
| |
| InputHandlerProxy::EventDisposition result = DID_NOT_HANDLE; |
| scroll_sequence_ignored_ = false; |
| in_inertial_scrolling_ = false; |
| switch (scroll_status.thread) { |
| case cc::InputHandler::SCROLL_ON_IMPL_THREAD: |
| TRACE_EVENT_INSTANT0("input", "Handle On Impl", TRACE_EVENT_SCOPE_THREAD); |
| gesture_scroll_on_impl_thread_ = true; |
| if (input_handler_->IsCurrentlyScrollingViewport()) |
| client_->DidStartScrollingViewport(); |
| |
| if (scroll_status.bubble) |
| result = DID_HANDLE_SHOULD_BUBBLE; |
| else |
| result = DID_HANDLE; |
| break; |
| case cc::InputHandler::SCROLL_UNKNOWN: |
| case cc::InputHandler::SCROLL_ON_MAIN_THREAD: |
| TRACE_EVENT_INSTANT0("input", "Handle On Main", TRACE_EVENT_SCOPE_THREAD); |
| result = DID_NOT_HANDLE; |
| break; |
| case cc::InputHandler::SCROLL_IGNORED: |
| TRACE_EVENT_INSTANT0("input", "Ignore Scroll", TRACE_EVENT_SCOPE_THREAD); |
| scroll_sequence_ignored_ = true; |
| result = DROP_EVENT; |
| break; |
| } |
| if (scroll_elasticity_controller_ && result != DID_NOT_HANDLE) |
| HandleScrollElasticityOverscroll(gesture_event, |
| cc::InputHandlerScrollResult()); |
| |
| return result; |
| } |
| |
| InputHandlerProxy::EventDisposition |
| InputHandlerProxy::HandleGestureScrollUpdate( |
| const WebGestureEvent& gesture_event) { |
| #if DCHECK_IS_ON() |
| DCHECK(expect_scroll_update_end_); |
| #endif |
| |
| gfx::Vector2dF scroll_delta(-gesture_event.data.scroll_update.delta_x, |
| -gesture_event.data.scroll_update.delta_y); |
| TRACE_EVENT2("input", "InputHandlerProxy::HandleGestureScrollUpdate", "dx", |
| scroll_delta.x(), "dy", scroll_delta.y()); |
| |
| if (scroll_sequence_ignored_) { |
| TRACE_EVENT_INSTANT0("input", "Scroll Sequence Ignored", |
| TRACE_EVENT_SCOPE_THREAD); |
| return DROP_EVENT; |
| } |
| |
| if (!gesture_scroll_on_impl_thread_ && !gesture_pinch_in_progress_) |
| return DID_NOT_HANDLE; |
| |
| cc::ScrollState scroll_state = CreateScrollStateForGesture(gesture_event); |
| in_inertial_scrolling_ = scroll_state.is_in_inertial_phase(); |
| gfx::PointF scroll_point(gesture_event.PositionInWidget()); |
| |
| if (ShouldAnimate(gesture_event.data.scroll_update.delta_units != |
| blink::WebGestureEvent::ScrollUnits::kPixels)) { |
| DCHECK(!scroll_state.is_in_inertial_phase()); |
| base::TimeTicks event_time = gesture_event.TimeStamp(); |
| base::TimeDelta delay = base::TimeTicks::Now() - event_time; |
| switch (input_handler_ |
| ->ScrollAnimated(gfx::ToFlooredPoint(scroll_point), |
| scroll_delta, delay) |
| .thread) { |
| case cc::InputHandler::SCROLL_ON_IMPL_THREAD: |
| return DID_HANDLE; |
| case cc::InputHandler::SCROLL_IGNORED: |
| TRACE_EVENT_INSTANT0("input", "Scroll Ignored", |
| TRACE_EVENT_SCOPE_THREAD); |
| return DROP_EVENT; |
| case cc::InputHandler::SCROLL_ON_MAIN_THREAD: |
| case cc::InputHandler::SCROLL_UNKNOWN: |
| if (input_handler_->ScrollingShouldSwitchtoMainThread()) { |
| TRACE_EVENT_INSTANT0("input", "Move Scroll To Main Thread", |
| TRACE_EVENT_SCOPE_THREAD); |
| gesture_scroll_on_impl_thread_ = false; |
| client_->GenerateScrollBeginAndSendToMainThread(gesture_event); |
| } |
| return DID_NOT_HANDLE; |
| } |
| } |
| |
| if (snap_fling_controller_->HandleGestureScrollUpdate( |
| GetGestureScrollUpdateInfo(gesture_event))) { |
| #if DCHECK_IS_ON() |
| expect_scroll_update_end_ = false; |
| #endif |
| gesture_scroll_on_impl_thread_ = false; |
| return DROP_EVENT; |
| } |
| |
| cc::InputHandlerScrollResult scroll_result = |
| input_handler_->ScrollBy(&scroll_state); |
| |
| if (!scroll_result.did_scroll && |
| input_handler_->ScrollingShouldSwitchtoMainThread()) { |
| gesture_scroll_on_impl_thread_ = false; |
| client_->GenerateScrollBeginAndSendToMainThread(gesture_event); |
| |
| if (!gesture_pinch_in_progress_) |
| return DID_NOT_HANDLE; |
| } |
| |
| HandleOverscroll(scroll_point, scroll_result); |
| |
| if (scroll_elasticity_controller_) |
| HandleScrollElasticityOverscroll(gesture_event, scroll_result); |
| |
| return scroll_result.did_scroll ? DID_HANDLE : DROP_EVENT; |
| } |
| |
| InputHandlerProxy::EventDisposition InputHandlerProxy::HandleGestureScrollEnd( |
| const WebGestureEvent& gesture_event) { |
| TRACE_EVENT0("input", "InputHandlerProxy::HandleGestureScrollEnd"); |
| #if DCHECK_IS_ON() |
| DCHECK(expect_scroll_update_end_); |
| expect_scroll_update_end_ = false; |
| #endif |
| if (ShouldAnimate(gesture_event.data.scroll_end.delta_units != |
| blink::WebGestureEvent::ScrollUnits::kPixels)) { |
| // Do nothing if the scroll is being animated; the scroll animation will |
| // generate the ScrollEnd when it is done. |
| } else { |
| cc::ScrollState scroll_state = CreateScrollStateForGesture(gesture_event); |
| input_handler_->ScrollEnd(&scroll_state, true); |
| } |
| |
| if (scroll_sequence_ignored_) |
| return DROP_EVENT; |
| |
| if (!gesture_scroll_on_impl_thread_) |
| return DID_NOT_HANDLE; |
| |
| if (scroll_elasticity_controller_) |
| HandleScrollElasticityOverscroll(gesture_event, |
| cc::InputHandlerScrollResult()); |
| |
| gesture_scroll_on_impl_thread_ = false; |
| return DID_HANDLE; |
| } |
| |
| InputHandlerProxy::EventDisposition InputHandlerProxy::HitTestTouchEvent( |
| const blink::WebTouchEvent& touch_event, |
| bool* is_touching_scrolling_layer, |
| cc::TouchAction* white_listed_touch_action) { |
| *is_touching_scrolling_layer = false; |
| EventDisposition result = DROP_EVENT; |
| for (size_t i = 0; i < touch_event.touches_length; ++i) { |
| if (touch_event.touch_start_or_first_touch_move) |
| DCHECK(white_listed_touch_action); |
| else |
| DCHECK(!white_listed_touch_action); |
| |
| if (touch_event.GetType() == WebInputEvent::kTouchStart && |
| touch_event.touches[i].state != WebTouchPoint::kStatePressed) { |
| continue; |
| } |
| |
| cc::TouchAction touch_action = cc::kTouchActionAuto; |
| cc::InputHandler::TouchStartOrMoveEventListenerType event_listener_type = |
| input_handler_->EventListenerTypeForTouchStartOrMoveAt( |
| gfx::Point(touch_event.touches[i].PositionInWidget().x, |
| touch_event.touches[i].PositionInWidget().y), |
| &touch_action); |
| if (white_listed_touch_action) |
| *white_listed_touch_action &= touch_action; |
| |
| if (event_listener_type != |
| cc::InputHandler::TouchStartOrMoveEventListenerType::NO_HANDLER) { |
| *is_touching_scrolling_layer = |
| event_listener_type == |
| cc::InputHandler::TouchStartOrMoveEventListenerType:: |
| HANDLER_ON_SCROLLING_LAYER; |
| // A non-passive touch start / move will always set the whitelisted touch |
| // action to kTouchActionNone, and in that case we do not ack the event |
| // from the compositor. |
| if (compositor_touch_action_enabled_ && white_listed_touch_action && |
| *white_listed_touch_action != cc::kTouchActionNone) |
| result = DID_HANDLE_NON_BLOCKING; |
| else |
| result = DID_NOT_HANDLE; |
| break; |
| } |
| } |
| |
| // If |result| is DROP_EVENT it wasn't processed above. |
| if (result == DROP_EVENT) { |
| switch (input_handler_->GetEventListenerProperties( |
| cc::EventListenerClass::kTouchStartOrMove)) { |
| case cc::EventListenerProperties::kPassive: |
| result = DID_HANDLE_NON_BLOCKING; |
| break; |
| case cc::EventListenerProperties::kBlocking: |
| // The touch area rects above already have checked whether it hits |
| // a blocking region. Since it does not the event can be dropped. |
| result = DROP_EVENT; |
| break; |
| case cc::EventListenerProperties::kBlockingAndPassive: |
| // There is at least one passive listener that needs to possibly |
| // be notified so it can't be dropped. |
| result = DID_HANDLE_NON_BLOCKING; |
| break; |
| case cc::EventListenerProperties::kNone: |
| result = DROP_EVENT; |
| break; |
| default: |
| NOTREACHED(); |
| result = DROP_EVENT; |
| break; |
| } |
| } |
| |
| // Merge |touch_result_| and |result| so the result has the highest |
| // priority value according to the sequence; (DROP_EVENT, |
| // DID_HANDLE_NON_BLOCKING, DID_NOT_HANDLE). |
| if (touch_result_ == kEventDispositionUndefined || |
| touch_result_ == DROP_EVENT || result == DID_NOT_HANDLE) |
| touch_result_ = result; |
| return result; |
| } |
| |
| InputHandlerProxy::EventDisposition InputHandlerProxy::HandleTouchStart( |
| const blink::WebTouchEvent& touch_event) { |
| bool is_touching_scrolling_layer; |
| cc::TouchAction white_listed_touch_action = cc::kTouchActionAuto; |
| EventDisposition result = HitTestTouchEvent( |
| touch_event, &is_touching_scrolling_layer, &white_listed_touch_action); |
| |
| // If |result| is still DROP_EVENT look at the touch end handler as |
| // we may not want to discard the entire touch sequence. Note this |
| // code is explicitly after the assignment of the |touch_result_| |
| // so the touch moves are not sent to the main thread un-necessarily. |
| if (result == DROP_EVENT && |
| input_handler_->GetEventListenerProperties( |
| cc::EventListenerClass::kTouchEndOrCancel) != |
| cc::EventListenerProperties::kNone) { |
| result = DID_HANDLE_NON_BLOCKING; |
| } |
| |
| bool is_in_inertial_scrolling_on_impl = |
| in_inertial_scrolling_ && gesture_scroll_on_impl_thread_; |
| if (is_in_inertial_scrolling_on_impl && is_touching_scrolling_layer) |
| result = DID_NOT_HANDLE_NON_BLOCKING_DUE_TO_FLING; |
| |
| client_->SetWhiteListedTouchAction(white_listed_touch_action, |
| touch_event.unique_touch_event_id, result); |
| |
| return result; |
| } |
| |
| InputHandlerProxy::EventDisposition InputHandlerProxy::HandleTouchMove( |
| const blink::WebTouchEvent& touch_event) { |
| // Hit test if this is the first touch move or we don't have any results |
| // from a previous hit test. |
| if (touch_result_ == kEventDispositionUndefined || |
| touch_event.touch_start_or_first_touch_move) { |
| bool is_touching_scrolling_layer; |
| cc::TouchAction white_listed_touch_action = cc::kTouchActionAuto; |
| EventDisposition result = HitTestTouchEvent( |
| touch_event, &is_touching_scrolling_layer, &white_listed_touch_action); |
| client_->SetWhiteListedTouchAction( |
| white_listed_touch_action, touch_event.unique_touch_event_id, result); |
| return result; |
| } |
| return static_cast<EventDisposition>(touch_result_); |
| } |
| |
| InputHandlerProxy::EventDisposition InputHandlerProxy::HandleTouchEnd( |
| const blink::WebTouchEvent& touch_event) { |
| if (touch_event.touches_length == 1) |
| touch_result_ = kEventDispositionUndefined; |
| return DID_NOT_HANDLE; |
| } |
| |
| void InputHandlerProxy::Animate(base::TimeTicks time) { |
| // If using synchronous animate, then only expect Animate attempts started by |
| // the synchronous system. Don't let the InputHandler try to Animate also. |
| DCHECK(!input_handler_->IsCurrentlyScrollingViewport() || |
| allow_root_animate_); |
| |
| if (scroll_elasticity_controller_) |
| scroll_elasticity_controller_->Animate(time); |
| |
| snap_fling_controller_->Animate(time); |
| } |
| |
| void InputHandlerProxy::ReconcileElasticOverscrollAndRootScroll() { |
| if (scroll_elasticity_controller_) |
| scroll_elasticity_controller_->ReconcileStretchAndScroll(); |
| } |
| |
| void InputHandlerProxy::UpdateRootLayerStateForSynchronousInputHandler( |
| const gfx::ScrollOffset& total_scroll_offset, |
| const gfx::ScrollOffset& max_scroll_offset, |
| const gfx::SizeF& scrollable_size, |
| float page_scale_factor, |
| float min_page_scale_factor, |
| float max_page_scale_factor) { |
| if (synchronous_input_handler_) { |
| synchronous_input_handler_->UpdateRootLayerState( |
| total_scroll_offset, max_scroll_offset, scrollable_size, |
| page_scale_factor, min_page_scale_factor, max_page_scale_factor); |
| } |
| } |
| |
| void InputHandlerProxy::DeliverInputForBeginFrame() { |
| DispatchQueuedInputEvents(); |
| } |
| |
| void InputHandlerProxy::SetOnlySynchronouslyAnimateRootFlings( |
| SynchronousInputHandler* synchronous_input_handler) { |
| allow_root_animate_ = !synchronous_input_handler; |
| synchronous_input_handler_ = synchronous_input_handler; |
| if (synchronous_input_handler_) |
| input_handler_->RequestUpdateForSynchronousInputHandler(); |
| } |
| |
| void InputHandlerProxy::SynchronouslyAnimate(base::TimeTicks time) { |
| // When this function is used, SetOnlySynchronouslyAnimate() should have been |
| // previously called. IOW you should either be entirely in synchronous mode or |
| // not. |
| DCHECK(synchronous_input_handler_); |
| DCHECK(!allow_root_animate_); |
| base::AutoReset<bool> reset(&allow_root_animate_, true); |
| Animate(time); |
| } |
| |
| void InputHandlerProxy::SynchronouslySetRootScrollOffset( |
| const gfx::ScrollOffset& root_offset) { |
| DCHECK(synchronous_input_handler_); |
| input_handler_->SetSynchronousInputHandlerRootScrollOffset(root_offset); |
| } |
| |
| void InputHandlerProxy::SynchronouslyZoomBy(float magnify_delta, |
| const gfx::Point& anchor) { |
| DCHECK(synchronous_input_handler_); |
| input_handler_->PinchGestureBegin(); |
| input_handler_->PinchGestureUpdate(magnify_delta, anchor); |
| input_handler_->PinchGestureEnd(anchor, false); |
| } |
| |
| bool InputHandlerProxy::GetSnapFlingInfo( |
| const gfx::Vector2dF& natural_displacement, |
| gfx::Vector2dF* initial_offset, |
| gfx::Vector2dF* target_offset) const { |
| return input_handler_->GetSnapFlingInfo(natural_displacement, initial_offset, |
| target_offset); |
| } |
| |
| gfx::Vector2dF InputHandlerProxy::ScrollByForSnapFling( |
| const gfx::Vector2dF& delta) { |
| cc::ScrollState scroll_state = CreateScrollStateForInertialUpdate(delta); |
| cc::InputHandlerScrollResult scroll_result = |
| input_handler_->ScrollBy(&scroll_state); |
| return scroll_result.current_visual_offset; |
| } |
| |
| void InputHandlerProxy::ScrollEndForSnapFling() { |
| cc::ScrollState scroll_state = CreateScrollStateForInertialEnd(); |
| input_handler_->ScrollEnd(&scroll_state, false); |
| } |
| |
| void InputHandlerProxy::RequestAnimationForSnapFling() { |
| RequestAnimation(); |
| } |
| |
| void InputHandlerProxy::HandleOverscroll( |
| const gfx::PointF& causal_event_viewport_point, |
| const cc::InputHandlerScrollResult& scroll_result) { |
| DCHECK(client_); |
| if (!scroll_result.did_overscroll_root) |
| return; |
| |
| TRACE_EVENT2("input", |
| "InputHandlerProxy::DidOverscroll", |
| "dx", |
| scroll_result.unused_scroll_delta.x(), |
| "dy", |
| scroll_result.unused_scroll_delta.y()); |
| |
| // Bundle overscroll message with triggering event response, saving an IPC. |
| current_overscroll_params_.reset(new DidOverscrollParams()); |
| current_overscroll_params_->accumulated_overscroll = |
| scroll_result.accumulated_root_overscroll; |
| current_overscroll_params_->latest_overscroll_delta = |
| scroll_result.unused_scroll_delta; |
| current_overscroll_params_->causal_event_viewport_point = |
| causal_event_viewport_point; |
| current_overscroll_params_->overscroll_behavior = |
| scroll_result.overscroll_behavior; |
| return; |
| } |
| |
| void InputHandlerProxy::RequestAnimation() { |
| // When a SynchronousInputHandler is present, root flings should go through |
| // it to allow it to control when or if the root fling is animated. Non-root |
| // flings always go through the normal InputHandler. |
| if (synchronous_input_handler_ && |
| input_handler_->IsCurrentlyScrollingViewport()) |
| synchronous_input_handler_->SetNeedsSynchronousAnimateInput(); |
| else |
| input_handler_->SetNeedsAnimateInput(); |
| } |
| |
| void InputHandlerProxy::HandleScrollElasticityOverscroll( |
| const WebGestureEvent& gesture_event, |
| const cc::InputHandlerScrollResult& scroll_result) { |
| DCHECK(scroll_elasticity_controller_); |
| // Send the event and its disposition to the elasticity controller to update |
| // the over-scroll animation. Note that the call to the elasticity controller |
| // is made asynchronously, to minimize divergence between main thread and |
| // impl thread event handling paths. |
| base::ThreadTaskRunnerHandle::Get()->PostTask( |
| FROM_HERE, |
| base::BindOnce( |
| &InputScrollElasticityController::ObserveGestureEventAndResult, |
| scroll_elasticity_controller_->GetWeakPtr(), gesture_event, |
| scroll_result)); |
| } |
| |
| void InputHandlerProxy::SetTickClockForTesting( |
| const base::TickClock* tick_clock) { |
| tick_clock_ = tick_clock; |
| } |
| |
| } // namespace ui |
