| // Copyright 2017 The Cobalt Authors. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #ifndef COBALT_LAYOUT_TOPMOST_EVENT_TARGET_H_ |
| #define COBALT_LAYOUT_TOPMOST_EVENT_TARGET_H_ |
| |
| #include <set> |
| #include <string> |
| |
| #include "base/memory/weak_ptr.h" |
| #include "cobalt/dom/document.h" |
| #include "cobalt/dom/html_element.h" |
| #include "cobalt/dom/pointer_event.h" |
| #include "cobalt/layout/box.h" |
| #include "cobalt/layout/layout_boxes.h" |
| #include "cobalt/math/vector2d.h" |
| #include "cobalt/math/vector2d_f.h" |
| #include "cobalt/ui_navigation/scroll_engine/scroll_engine.h" |
| #include "cobalt/web/event.h" |
| |
| namespace cobalt { |
| namespace layout { |
| |
| class TopmostEventTarget { |
| public: |
| explicit TopmostEventTarget( |
| ui_navigation::scroll_engine::ScrollEngine* scroll_engine); |
| |
| void MaybeSendPointerEvents(const scoped_refptr<web::Event>& event); |
| |
| private: |
| scoped_refptr<dom::HTMLElement> FindTopmostEventTarget( |
| const scoped_refptr<dom::Document>& document, |
| const math::Vector2dF& coordinate); |
| |
| void HandleScrollState(scoped_refptr<dom::HTMLElement> target_element, |
| const dom::PointerEvent* pointer_event, |
| dom::PointerState* pointer_state, |
| dom::PointerEventInit* event_init); |
| void CancelScrollsInParentNavItems( |
| scoped_refptr<dom::HTMLElement> target_element); |
| |
| void ConsiderElement(dom::Element* element, |
| const math::Vector2dF& coordinate); |
| void ConsiderBoxes(const scoped_refptr<dom::HTMLElement>& html_element, |
| LayoutBoxes* layout_boxes, |
| const math::Vector2dF& coordinate); |
| |
| base::WeakPtr<dom::HTMLElement> previous_html_element_weak_; |
| scoped_refptr<dom::HTMLElement> html_element_; |
| scoped_refptr<Box> box_; |
| Box::RenderSequence render_sequence_; |
| |
| ui_navigation::scroll_engine::ScrollEngine* scroll_engine_; |
| |
| // This map stores the pointer types for which the 'prevent mouse event' flag |
| // has been set as part of the compatibility mapping steps defined at |
| // https://www.w3.org/TR/pointerevents/#compatibility-mapping-with-mouse-events. |
| std::set<std::string> mouse_event_prevent_flags_; |
| }; |
| |
| } // namespace layout |
| } // namespace cobalt |
| |
| #endif // COBALT_LAYOUT_TOPMOST_EVENT_TARGET_H_ |