/* * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights * reserved. * Copyright (C) 2006 Alexey Proskuryakov ([email protected]) * Copyright (C) 2012 Digia Plc. and/or its subsidiary(-ies) * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include "third_party/blink/renderer/core/input/event_handler.h" #include <memory> #include <utility> #include "base/check.h" #include "build/build_config.h" #include "third_party/blink/public/common/input/web_input_event.h" #include "third_party/blink/public/common/input/web_mouse_wheel_event.h" #include "third_party/blink/public/mojom/frame/user_activation_notification_type.mojom-blink.h" #include "third_party/blink/public/mojom/use_counter/metrics/web_feature.mojom-blink.h" #include "third_party/blink/public/platform/task_type.h" #include "third_party/blink/public/web/web_link_preview_triggerer.h" #include "third_party/blink/renderer/core/clipboard/data_transfer.h" #include "third_party/blink/renderer/core/css/style_engine.h" #include "third_party/blink/renderer/core/dom/document.h" #include "third_party/blink/renderer/core/dom/flat_tree_traversal.h" #include "third_party/blink/renderer/core/dom/shadow_root.h" #include "third_party/blink/renderer/core/editing/editing_utilities.h" #include "third_party/blink/renderer/core/editing/editor.h" #include "third_party/blink/renderer/core/editing/frame_selection.h" #include "third_party/blink/renderer/core/editing/local_caret_rect.h" #include "third_party/blink/renderer/core/editing/selection_controller.h" #include "third_party/blink/renderer/core/editing/selection_template.h" #include "third_party/blink/renderer/core/editing/text_affinity.h" #include "third_party/blink/renderer/core/editing/visible_selection.h" #include "third_party/blink/renderer/core/events/keyboard_event.h" #include "third_party/blink/renderer/core/events/mouse_event.h" #include "third_party/blink/renderer/core/events/pointer_event.h" #include "third_party/blink/renderer/core/events/pointer_event_factory.h" #include "third_party/blink/renderer/core/events/text_event.h" #include "third_party/blink/renderer/core/events/touch_event.h" #include "third_party/blink/renderer/core/frame/event_handler_registry.h" #include "third_party/blink/renderer/core/frame/local_frame.h" #include "third_party/blink/renderer/core/frame/local_frame_client.h" #include "third_party/blink/renderer/core/frame/local_frame_view.h" #include "third_party/blink/renderer/core/frame/settings.h" #include "third_party/blink/renderer/core/frame/visual_viewport.h" #include "third_party/blink/renderer/core/html/forms/html_input_element.h" #include "third_party/blink/renderer/core/html/html_dialog_element.h" #include "third_party/blink/renderer/core/html/html_frame_element_base.h" #include "third_party/blink/renderer/core/html/html_frame_set_element.h" #include "third_party/blink/renderer/core/input/event_handling_util.h" #include "third_party/blink/renderer/core/input/input_device_capabilities.h" #include "third_party/blink/renderer/core/input_type_names.h" #include "third_party/blink/renderer/core/layout/custom_scrollbar.h" #include "third_party/blink/renderer/core/layout/geometry/physical_offset.h" #include "third_party/blink/renderer/core/layout/hit_test_request.h" #include "third_party/blink/renderer/core/layout/hit_test_result.h" #include "third_party/blink/renderer/core/layout/layout_box.h" #include "third_party/blink/renderer/core/layout/layout_custom_scrollbar_part.h" #include "third_party/blink/renderer/core/layout/layout_embedded_content.h" #include "third_party/blink/renderer/core/layout/layout_view.h" #include "third_party/blink/renderer/core/loader/anchor_element_interaction_tracker.h" #include "third_party/blink/renderer/core/loader/resource/image_resource_content.h" #include "third_party/blink/renderer/core/page/autoscroll_controller.h" #include "third_party/blink/renderer/core/page/chrome_client.h" #include "third_party/blink/renderer/core/page/drag_state.h" #include "third_party/blink/renderer/core/page/frame_tree.h" #include "third_party/blink/renderer/core/page/page.h" #include "third_party/blink/renderer/core/page/touch_adjustment.h" #include "third_party/blink/renderer/core/paint/paint_layer.h" #include "third_party/blink/renderer/core/paint/paint_layer_scrollable_area.h" #include "third_party/blink/renderer/core/scroll/scroll_types.h" #include "third_party/blink/renderer/core/scroll/scrollbar.h" #include "third_party/blink/renderer/core/style/computed_style.h" #include "third_party/blink/renderer/core/style/computed_style_base_constants.h" #include "third_party/blink/renderer/core/style/cursor_data.h" #include "third_party/blink/renderer/core/svg/graphics/svg_image_for_container.h" #include "third_party/blink/renderer/core/svg/svg_use_element.h" #include "third_party/blink/renderer/platform/bindings/exception_state.h" #include "third_party/blink/renderer/platform/cursors.h" #include "third_party/blink/renderer/platform/geometry/layout_unit.h" #include "third_party/blink/renderer/platform/graphics/image_orientation.h" #include "third_party/blink/renderer/platform/heap/garbage_collected.h" #include "third_party/blink/renderer/platform/runtime_enabled_features.h" #include "third_party/blink/renderer/platform/scheduler/public/post_cancellable_task.h" #include "third_party/blink/renderer/platform/windows_keyboard_codes.h" #include "third_party/blink/renderer/platform/wtf/casting.h" #include "third_party/blink/renderer/platform/wtf/std_lib_extras.h" #include "third_party/skia/include/core/SkBitmap.h" #include "ui/base/cursor/cursor.h" #include "ui/base/cursor/mojom/cursor_type.mojom-blink.h" #include "ui/base/dragdrop/mojom/drag_drop_types.mojom-blink.h" #include "ui/display/screen_info.h" #include "ui/display/screen_infos.h" #include "ui/gfx/geometry/point.h" #include "ui/gfx/geometry/point_conversions.h" #include "ui/gfx/geometry/point_f.h" #include "ui/gfx/geometry/rect.h" #include "ui/gfx/geometry/rect_conversions.h" #include "ui/gfx/geometry/size.h" #include "ui/gfx/geometry/size_conversions.h" #include "ui/gfx/geometry/size_f.h" namespace blink { FormControlType; namespace { // Refetch the event target node if it is removed or currently is the shadow // node inside an <input> element. If a mouse event handler changes the input // element type to one that has a EmbeddedContentView associated, we'd like to // EventHandler::handleMousePressEvent to pass the event to the // EmbeddedContentView and thus the event target node can't still be the shadow // node. bool ShouldRefetchEventTarget(const MouseEventWithHitTestResults& mev) { … } gfx::Point GetMiddleSelectionCaretOfPosition( const PositionWithAffinity& position) { … } bool ContainsEvenAtEdge(const gfx::Rect& rect, const gfx::Point& point) { … } gfx::Point DetermineHotSpot(const Image& image, bool hot_spot_specified, const gfx::Point& specified_hot_spot) { … } // Returns whether the hit element contains a title and isn't a SVGUseElement or // part of an SVGUseElement. bool HasTitleAndNotSVGUseElement(const HitTestResult& hovered_node_result) { … } // Get the entire style of scrollbar to get the cursor style of scrollbar const ComputedStyle* GetComputedStyleFromScrollbar( const LayoutObject& layout_object, const HitTestResult& result) { … } } // namespace // The amount of time to wait for a cursor update on style and layout changes // Set to 50Hz, no need to be faster than common screen refresh rate static constexpr base::TimeDelta kCursorUpdateInterval = …; // The maximum size a cursor can be without falling back to the default cursor // when intersecting browser native UI. // https://developer.mozilla.org/en-US/docs/Web/CSS/cursor#icon_size_limits. static const int kMaximumCursorSizeWithoutFallback = …; // The minimum amount of time an element stays active after a ShowPress // This is roughly 9 frames, which should be long enough to be noticeable. constexpr base::TimeDelta kMinimumActiveInterval = …; EventHandler::EventHandler(LocalFrame& frame) : … { … } void EventHandler::Trace(Visitor* visitor) const { … } void EventHandler::Clear() { … } void EventHandler::UpdateSelectionForMouseDrag() { … } void EventHandler::StartMiddleClickAutoscroll(LayoutObject* layout_object) { … } void EventHandler::PerformHitTest(const HitTestLocation& location, HitTestResult& result, bool no_lifecycle_update) const { … } HitTestResult EventHandler::HitTestResultAtLocation( const HitTestLocation& location, HitTestRequest::HitTestRequestType hit_type, const LayoutObject* stop_node, bool no_lifecycle_update, std::optional<HitTestRequest::HitNodeCb> hit_node_cb) { … } void EventHandler::StopAutoscroll() { … } // TODO(bokan): This should be merged with logicalScroll assuming // defaultSpaceEventHandler's chaining scroll can be done crossing frames. bool EventHandler::BubblingScroll(mojom::blink::ScrollDirection direction, ui::ScrollGranularity granularity, Node* starting_node) { … } gfx::PointF EventHandler::LastKnownMousePositionInRootFrame() const { … } gfx::PointF EventHandler::LastKnownMouseScreenPosition() const { … } gfx::Point EventHandler::DragDataTransferLocationForTesting() { … } static bool IsSubmitImage(const Node* node) { … } bool EventHandler::UsesHandCursor(const Node* node) { … } void EventHandler::CursorUpdateTimerFired(TimerBase*) { … } void EventHandler::UpdateCursor() { … } bool EventHandler::ShouldShowResizeForNode(const LayoutObject& layout_object, const HitTestLocation& location) { … } bool EventHandler::IsSelectingLink(const HitTestResult& result) { … } bool EventHandler::ShouldShowIBeamForNode(const Node* node, const HitTestResult& result) { … } std::optional<ui::Cursor> EventHandler::SelectCursor( const HitTestLocation& location, const HitTestResult& result) { … } std::optional<ui::Cursor> EventHandler::SelectAutoCursor( const HitTestResult& result, Node* node, const ui::Cursor& i_beam) { … } WebInputEventResult EventHandler::DispatchBufferedTouchEvents() { … } WebInputEventResult EventHandler::HandlePointerEvent( const WebPointerEvent& web_pointer_event, const Vector<WebPointerEvent>& coalesced_events, const Vector<WebPointerEvent>& predicted_events) { … } WebInputEventResult EventHandler::HandleMousePressEvent( const WebMouseEvent& mouse_event) { … } WebInputEventResult EventHandler::HandleMouseMoveEvent( const WebMouseEvent& event, const Vector<WebMouseEvent>& coalesced_events, const Vector<WebMouseEvent>& predicted_events) { … } void EventHandler::HandleMouseLeaveEvent(const WebMouseEvent& event) { … } WebInputEventResult EventHandler::HandleMouseMoveOrLeaveEvent( const WebMouseEvent& mouse_event, const Vector<WebMouseEvent>& coalesced_events, const Vector<WebMouseEvent>& predicted_events, HitTestResult* hovered_node_result, HitTestLocation* hit_test_location) { … } WebInputEventResult EventHandler::HandleMouseReleaseEvent( const WebMouseEvent& mouse_event) { … } static LocalFrame* LocalFrameFromTargetNode(Node* target) { … } WebInputEventResult EventHandler::UpdateDragAndDrop( const WebMouseEvent& event, DataTransfer* data_transfer) { … } void EventHandler::CancelDragAndDrop(const WebMouseEvent& event, DataTransfer* data_transfer) { … } WebInputEventResult EventHandler::PerformDragAndDrop( const WebMouseEvent& event, DataTransfer* data_transfer) { … } void EventHandler::ClearDragState() { … } void EventHandler::RecomputeMouseHoverStateIfNeeded() { … } void EventHandler::MarkHoverStateDirty() { … } Element* EventHandler::EffectiveMouseEventTargetElement( Element* target_element) { … } void EventHandler::OnScrollbarDestroyed(const Scrollbar& scrollbar) { … } Element* EventHandler::GetElementUnderMouse() { … } Element* EventHandler::CurrentTouchDownElement() { … } void EventHandler::SetDelayedNavigationTaskHandle(TaskHandle task_handle) { … } TaskHandle& EventHandler::GetDelayedNavigationTaskHandle() { … } bool EventHandler::IsPointerIdActiveOnFrame(PointerId pointer_id, LocalFrame* frame) const { … } bool EventHandler::RootFrameTrackedActivePointerInCurrentFrame( PointerId pointer_id) const { … } bool EventHandler::IsPointerEventActive(PointerId pointer_id) { … } LocalFrame* EventHandler::DetermineActivePointerTrackerFrame( PointerId pointer_id) const { … } void EventHandler::SetPointerCapture(PointerId pointer_id, Element* target, bool explicit_capture) { … } void EventHandler::ReleasePointerCapture(PointerId pointer_id, Element* target) { … } void EventHandler::ReleaseMousePointerCapture() { … } bool EventHandler::HasPointerCapture(PointerId pointer_id, const Element* target) const { … } void EventHandler::ElementRemoved(Element* target) { … } void EventHandler::ResetMousePositionForPointerUnlock() { … } bool EventHandler::LongTapShouldInvokeContextMenu() { … } WebInputEventResult EventHandler::DispatchMousePointerEvent( const WebInputEvent::Type event_type, Element* target_element, const WebMouseEvent& mouse_event, const Vector<WebMouseEvent>& coalesced_events, const Vector<WebMouseEvent>& predicted_events, bool skip_click_dispatch) { … } WebInputEventResult EventHandler::HandleWheelEvent( const WebMouseWheelEvent& event) { … } // TODO(crbug.com/665924): This function bypasses all Handle*Event path. // It should be using that flow instead of creating/sending events directly. WebInputEventResult EventHandler::HandleTargetedMouseEvent( Element* target, const WebMouseEvent& event, const AtomicString& mouse_event_type, const Vector<WebMouseEvent>& coalesced_events, const Vector<WebMouseEvent>& predicted_events) { … } WebInputEventResult EventHandler::HandleGestureEvent( const WebGestureEvent& gesture_event) { … } WebInputEventResult EventHandler::HandleGestureEvent( const GestureEventWithHitTestResults& targeted_event) { … } WebInputEventResult EventHandler::HandleGestureEventInFrame( const GestureEventWithHitTestResults& targeted_event) { … } void EventHandler::SetMouseDownMayStartAutoscroll() { … } bool EventHandler::ShouldApplyTouchAdjustment( const WebGestureEvent& event) const { … } void EventHandler::CacheTouchAdjustmentResult(uint32_t id, gfx::PointF adjusted_point) { … } bool EventHandler::GestureCorrespondsToAdjustedTouch( const WebGestureEvent& event) { … } bool EventHandler::BestNodeForHitTestResult( TouchAdjustmentCandidateType candidate_type, const HitTestLocation& location, const HitTestResult& result, gfx::Point& adjusted_point, Node*& adjusted_node) { … } // Update the hover and active state across all frames. This logic is // different than the mouse case because mice send MouseLeave events to frames // as they're exited. With gestures or manual applications, a single event // conceptually both 'leaves' whatever frame currently had hover and enters a // new frame so we need to update state in the old frame chain as well. void EventHandler::UpdateCrossFrameHoverActiveState(bool is_active, Element* inner_element) { … } // Update the mouseover/mouseenter/mouseout/mouseleave events across all frames // for this gesture, before passing the targeted gesture event directly to a hit // frame. void EventHandler::UpdateGestureTargetNodeForMouseEvent( const GestureEventWithHitTestResults& targeted_event) { … } GestureEventWithHitTestResults EventHandler::TargetGestureEvent( const WebGestureEvent& gesture_event, bool read_only) { … } GestureEventWithHitTestResults EventHandler::HitTestResultForGestureEvent( const WebGestureEvent& gesture_event, HitTestRequest::HitTestRequestType hit_type) { … } void EventHandler::ApplyTouchAdjustment(WebGestureEvent* gesture_event, HitTestLocation& location, HitTestResult& hit_test_result) { … } WebInputEventResult EventHandler::SendContextMenuEvent( const WebMouseEvent& event, Element* override_target_element) { … } static bool ShouldShowContextMenuAtSelection(const FrameSelection& selection) { … } WebInputEventResult EventHandler::ShowNonLocatedContextMenu( Element* override_target_element, WebMenuSourceType source_type) { … } gfx::Rect EventHandler::GetFocusedElementRectForNonLocatedContextMenu( Element* focused_element) { … } void EventHandler::ScheduleHoverStateUpdate() { … } void EventHandler::ScheduleCursorUpdate() { … } bool EventHandler::CursorUpdatePending() { … } bool EventHandler::IsHandlingKeyEvent() const { … } void EventHandler::SetResizingFrameSet(HTMLFrameSetElement* frame_set) { … } void EventHandler::ResizeScrollableAreaDestroyed() { … } void EventHandler::HoverTimerFired(TimerBase*) { … } void EventHandler::ActiveIntervalTimerFired(TimerBase*) { … } void EventHandler::NotifyElementActivated() { … } bool EventHandler::HandleAccessKey(const WebKeyboardEvent& evt) { … } WebInputEventResult EventHandler::KeyEvent( const WebKeyboardEvent& initial_key_event) { … } void EventHandler::DefaultKeyboardEventHandler(KeyboardEvent* event) { … } void EventHandler::DragSourceEndedAt( const WebMouseEvent& event, ui::mojom::blink::DragOperation operation) { … } void EventHandler::UpdateDragStateAfterEditDragIfNeeded( Element* root_editable_element) { … } bool EventHandler::HandleTextInputEvent(const String& text, Event* underlying_event, TextEventInputType input_type) { … } void EventHandler::DefaultTextInputEventHandler(TextEvent* event) { … } void EventHandler::CapsLockStateMayHaveChanged() { … } bool EventHandler::PassMousePressEventToScrollbar( MouseEventWithHitTestResults& mev) { … } // If scrollbar (under mouse) is different from last, send a mouse exited. Set // last to scrollbar if setLast is true; else set last to 0. void EventHandler::UpdateLastScrollbarUnderMouse(Scrollbar* scrollbar, bool set_last) { … } WebInputEventResult EventHandler::PassMousePressEventToSubframe( MouseEventWithHitTestResults& mev, LocalFrame* subframe) { … } WebInputEventResult EventHandler::PassMouseMoveEventToSubframe( MouseEventWithHitTestResults& mev, const Vector<WebMouseEvent>& coalesced_events, const Vector<WebMouseEvent>& predicted_events, LocalFrame* subframe, HitTestResult* hovered_node, HitTestLocation* hit_test_location) { … } WebInputEventResult EventHandler::PassMouseReleaseEventToSubframe( MouseEventWithHitTestResults& mev, LocalFrame* subframe) { … } void EventHandler::CaptureMouseEventsToWidget(bool capture) { … } MouseEventWithHitTestResults EventHandler::GetMouseEventTarget( const HitTestRequest& request, const WebMouseEvent& event) { … } void EventHandler::ReleaseMouseCaptureFromLocalRoot() { … } void EventHandler::ReleaseMouseCaptureFromCurrentFrame() { … } base::debug::CrashKeyString* EventHandler::CrashKeyForBug1519197() const { … } void EventHandler::ResetLastMousePositionForWebTest() { … } } // namespace blink
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