| // Copyright 2015 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. |
| |
| #ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_WIDGET_INPUT_WIDGET_BASE_INPUT_HANDLER_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_PLATFORM_WIDGET_INPUT_WIDGET_BASE_INPUT_HANDLER_H_ |
| |
| #include <memory> |
| |
| #include "base/memory/weak_ptr.h" |
| #include "base/optional.h" |
| #include "third_party/blink/public/common/input/web_coalesced_input_event.h" |
| #include "third_party/blink/public/common/input/web_gesture_event.h" |
| #include "third_party/blink/public/mojom/input/input_event_result.mojom-blink.h" |
| #include "third_party/blink/public/platform/input/input_handler_proxy.h" |
| #include "third_party/blink/public/platform/web_input_event_result.h" |
| #include "third_party/blink/public/platform/web_touch_action.h" |
| #include "third_party/blink/renderer/platform/platform_export.h" |
| #include "ui/base/cursor/cursor.h" |
| #include "ui/events/types/scroll_types.h" |
| |
| namespace cc { |
| struct ElementId; |
| class EventMetrics; |
| struct OverscrollBehavior; |
| } // namespace cc |
| |
| namespace ui { |
| class LatencyInfo; |
| } |
| |
| namespace viz { |
| class FrameSinkId; |
| } |
| |
| namespace blink { |
| |
| class WidgetBase; |
| |
| class PLATFORM_EXPORT WidgetBaseInputHandler { |
| public: |
| WidgetBaseInputHandler(WidgetBase* widget); |
| WidgetBaseInputHandler(const WidgetBaseInputHandler&) = delete; |
| WidgetBaseInputHandler& operator=(const WidgetBaseInputHandler&) = delete; |
| |
| // Hit test the given point to find out the frame underneath and |
| // returns the FrameSinkId for that frame. |local_point| returns the point |
| // in the coordinate space of the FrameSinkId that was hit. |
| viz::FrameSinkId GetFrameSinkIdAtPoint(const gfx::PointF& point, |
| gfx::PointF* local_point); |
| |
| using HandledEventCallback = base::OnceCallback<void( |
| mojom::InputEventResultState ack_state, |
| const ui::LatencyInfo& latency_info, |
| std::unique_ptr<InputHandlerProxy::DidOverscrollParams>, |
| base::Optional<WebTouchAction>)>; |
| |
| // Handle input events from the input event provider. `metrics` contains |
| // information used in reporting latency metrics in case the event causes |
| // any updates. `callback` will be called when the event is handled. |
| void HandleInputEvent(const blink::WebCoalescedInputEvent& coalesced_event, |
| std::unique_ptr<cc::EventMetrics> metrics, |
| HandledEventCallback callback); |
| |
| // Handle overscroll from Blink. Returns whether the should be sent to the |
| // browser. This will return false if an event is currently being processed |
| // and will be returned part of the input ack. |
| bool DidOverscrollFromBlink(const gfx::Vector2dF& overscrollDelta, |
| const gfx::Vector2dF& accumulatedOverscroll, |
| const gfx::PointF& position, |
| const gfx::Vector2dF& velocity, |
| const cc::OverscrollBehavior& behavior); |
| |
| void InjectGestureScrollEvent(blink::WebGestureDevice device, |
| const gfx::Vector2dF& delta, |
| ui::ScrollGranularity granularity, |
| cc::ElementId scrollable_area_element_id, |
| blink::WebInputEvent::Type injected_type); |
| |
| bool handling_input_event() const { return handling_input_event_; } |
| void set_handling_input_event(bool handling_input_event) { |
| handling_input_event_ = handling_input_event; |
| } |
| |
| // Process the touch action, returning whether the action should be relayed |
| // to the browser. |
| bool ProcessTouchAction(WebTouchAction touch_action); |
| |
| // Process the new cursor and returns true if it has changed from the last |
| // cursor. |
| bool DidChangeCursor(const ui::Cursor& cursor); |
| |
| private: |
| class HandlingState; |
| struct InjectScrollGestureParams { |
| WebGestureDevice device; |
| gfx::Vector2dF scroll_delta; |
| ui::ScrollGranularity granularity; |
| cc::ElementId scrollable_area_element_id; |
| blink::WebInputEvent::Type type; |
| }; |
| |
| WebInputEventResult HandleTouchEvent( |
| const WebCoalescedInputEvent& coalesced_event); |
| |
| // Creates and handles scroll gestures based on parameters from |
| // `injected_scroll_params`. `input_event`, `original_latency_info`, and |
| // `original_metrics` are the original event causing gesture scrolls, its |
| // latency info, and its metrics, respectively, used in generating new |
| // gestures along with their latency info and metrics. |
| void HandleInjectedScrollGestures( |
| std::vector<InjectScrollGestureParams> injected_scroll_params, |
| const WebInputEvent& input_event, |
| const ui::LatencyInfo& original_latency_info, |
| const cc::EventMetrics* original_metrics); |
| |
| WidgetBase* widget_; |
| |
| // Are we currently handling an input event? |
| bool handling_input_event_ = false; |
| |
| // Current state from HandleInputEvent. This variable is stack allocated |
| // and is not owned. |
| HandlingState* handling_input_state_ = nullptr; |
| |
| // We store the current cursor object so we can avoid spamming SetCursor |
| // messages. |
| base::Optional<ui::Cursor> current_cursor_; |
| |
| // Indicates if the next sequence of Char events should be suppressed or not. |
| bool suppress_next_char_events_ = false; |
| |
| // Whether the last injected scroll gesture was a GestureScrollBegin. Used to |
| // determine which GestureScrollUpdate is the first in a gesture sequence for |
| // latency classification. |
| bool last_injected_gesture_was_begin_ = false; |
| |
| const bool supports_buffered_touch_ = false; |
| |
| base::WeakPtrFactory<WidgetBaseInputHandler> weak_ptr_factory_{this}; |
| }; |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_WIDGET_INPUT_WIDGET_BASE_INPUT_HANDLER_H_ |