| // Copyright 2016 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 "core/frame/WebFrameWidgetBase.h" |
| |
| #include "core/dom/Element.h" |
| #include "core/dom/UserGestureIndicator.h" |
| #include "core/events/WebInputEventConversion.h" |
| #include "core/events/WheelEvent.h" |
| #include "core/exported/WebViewImpl.h" |
| #include "core/frame/LocalFrameView.h" |
| #include "core/frame/VisualViewport.h" |
| #include "core/frame/WebLocalFrameImpl.h" |
| #include "core/input/ContextMenuAllowedScope.h" |
| #include "core/input/EventHandler.h" |
| #include "core/page/ContextMenuController.h" |
| #include "core/page/DragActions.h" |
| #include "core/page/DragController.h" |
| #include "core/page/DragData.h" |
| #include "core/page/DragSession.h" |
| #include "core/page/FocusController.h" |
| #include "core/page/Page.h" |
| #include "core/page/PointerLockController.h" |
| #include "platform/exported/WebActiveGestureAnimation.h" |
| #include "platform/wtf/Assertions.h" |
| #include "public/platform/Platform.h" |
| #include "public/platform/WebGestureCurve.h" |
| #include "public/web/WebLocalFrame.h" |
| #include "public/web/WebWidgetClient.h" |
| |
| namespace blink { |
| |
| namespace { |
| |
| // Helper to get LocalFrame* from WebLocalFrame*. |
| // TODO(dcheng): This should be moved into WebLocalFrame. |
| LocalFrame* ToCoreFrame(WebLocalFrame* frame) { |
| return ToWebLocalFrameImpl(frame)->GetFrame(); |
| } |
| |
| } // namespace |
| |
| // Ensure that the WebDragOperation enum values stay in sync with the original |
| // DragOperation constants. |
| STATIC_ASSERT_ENUM(kDragOperationNone, kWebDragOperationNone); |
| STATIC_ASSERT_ENUM(kDragOperationCopy, kWebDragOperationCopy); |
| STATIC_ASSERT_ENUM(kDragOperationLink, kWebDragOperationLink); |
| STATIC_ASSERT_ENUM(kDragOperationGeneric, kWebDragOperationGeneric); |
| STATIC_ASSERT_ENUM(kDragOperationPrivate, kWebDragOperationPrivate); |
| STATIC_ASSERT_ENUM(kDragOperationMove, kWebDragOperationMove); |
| STATIC_ASSERT_ENUM(kDragOperationDelete, kWebDragOperationDelete); |
| STATIC_ASSERT_ENUM(kDragOperationEvery, kWebDragOperationEvery); |
| |
| bool WebFrameWidgetBase::ignore_input_events_ = false; |
| |
| WebFrameWidgetBase::WebFrameWidgetBase() |
| : fling_modifier_(0), |
| fling_source_device_(kWebGestureDeviceUninitialized) {} |
| |
| WebFrameWidgetBase::~WebFrameWidgetBase() = default; |
| |
| WebDragOperation WebFrameWidgetBase::DragTargetDragEnter( |
| const WebDragData& web_drag_data, |
| const WebFloatPoint& point_in_viewport, |
| const WebFloatPoint& screen_point, |
| WebDragOperationsMask operations_allowed, |
| int modifiers) { |
| DCHECK(!current_drag_data_); |
| |
| current_drag_data_ = DataObject::Create(web_drag_data); |
| operations_allowed_ = operations_allowed; |
| |
| return DragTargetDragEnterOrOver(point_in_viewport, screen_point, kDragEnter, |
| modifiers); |
| } |
| |
| WebDragOperation WebFrameWidgetBase::DragTargetDragOver( |
| const WebFloatPoint& point_in_viewport, |
| const WebFloatPoint& screen_point, |
| WebDragOperationsMask operations_allowed, |
| int modifiers) { |
| operations_allowed_ = operations_allowed; |
| |
| return DragTargetDragEnterOrOver(point_in_viewport, screen_point, kDragOver, |
| modifiers); |
| } |
| |
| void WebFrameWidgetBase::DragTargetDragLeave( |
| const WebFloatPoint& point_in_viewport, |
| const WebFloatPoint& screen_point) { |
| DCHECK(current_drag_data_); |
| |
| // TODO(paulmeyer): It shouldn't be possible for |m_currentDragData| to be |
| // null here, but this is somehow happening (rarely). This suggests that in |
| // some cases drag-leave is happening before drag-enter, which should be |
| // impossible. This needs to be investigated further. Once fixed, the extra |
| // check for |!m_currentDragData| should be removed. (crbug.com/671152) |
| if (IgnoreInputEvents() || !current_drag_data_) { |
| CancelDrag(); |
| return; |
| } |
| |
| WebFloatPoint point_in_root_frame(ViewportToRootFrame(point_in_viewport)); |
| DragData drag_data(current_drag_data_.Get(), point_in_root_frame, |
| screen_point, |
| static_cast<DragOperation>(operations_allowed_)); |
| |
| GetPage()->GetDragController().DragExited(&drag_data, |
| *ToCoreFrame(LocalRoot())); |
| |
| // FIXME: why is the drag scroll timer not stopped here? |
| |
| drag_operation_ = kWebDragOperationNone; |
| current_drag_data_ = nullptr; |
| } |
| |
| void WebFrameWidgetBase::DragTargetDrop(const WebDragData& web_drag_data, |
| const WebFloatPoint& point_in_viewport, |
| const WebFloatPoint& screen_point, |
| int modifiers) { |
| WebFloatPoint point_in_root_frame(ViewportToRootFrame(point_in_viewport)); |
| |
| DCHECK(current_drag_data_); |
| current_drag_data_ = DataObject::Create(web_drag_data); |
| |
| // If this webview transitions from the "drop accepting" state to the "not |
| // accepting" state, then our IPC message reply indicating that may be in- |
| // flight, or else delayed by javascript processing in this webview. If a |
| // drop happens before our IPC reply has reached the browser process, then |
| // the browser forwards the drop to this webview. So only allow a drop to |
| // proceed if our webview m_dragOperation state is not DragOperationNone. |
| |
| if (drag_operation_ == kWebDragOperationNone) { |
| // IPC RACE CONDITION: do not allow this drop. |
| DragTargetDragLeave(point_in_viewport, screen_point); |
| return; |
| } |
| |
| if (!IgnoreInputEvents()) { |
| current_drag_data_->SetModifiers(modifiers); |
| DragData drag_data(current_drag_data_.Get(), point_in_root_frame, |
| screen_point, |
| static_cast<DragOperation>(operations_allowed_)); |
| |
| GetPage()->GetDragController().PerformDrag(&drag_data, |
| *ToCoreFrame(LocalRoot())); |
| } |
| drag_operation_ = kWebDragOperationNone; |
| current_drag_data_ = nullptr; |
| } |
| |
| void WebFrameWidgetBase::DragSourceEndedAt( |
| const WebFloatPoint& point_in_viewport, |
| const WebFloatPoint& screen_point, |
| WebDragOperation operation) { |
| if (!LocalRoot()) { |
| // We should figure out why |local_root_| could be nullptr |
| // (https://crbug.com/792345). |
| return; |
| } |
| |
| if (IgnoreInputEvents()) { |
| CancelDrag(); |
| return; |
| } |
| WebFloatPoint point_in_root_frame( |
| GetPage()->GetVisualViewport().ViewportToRootFrame(point_in_viewport)); |
| |
| WebMouseEvent fake_mouse_move( |
| WebInputEvent::kMouseMove, point_in_root_frame, screen_point, |
| WebPointerProperties::Button::kLeft, 0, WebInputEvent::kNoModifiers, |
| CurrentTimeTicks().InSeconds()); |
| fake_mouse_move.SetFrameScale(1); |
| ToCoreFrame(LocalRoot()) |
| ->GetEventHandler() |
| .DragSourceEndedAt(fake_mouse_move, |
| static_cast<DragOperation>(operation)); |
| } |
| |
| void WebFrameWidgetBase::DragSourceSystemDragEnded() { |
| CancelDrag(); |
| } |
| |
| void WebFrameWidgetBase::CancelDrag() { |
| // It's possible for us this to be callback while we're not doing a drag if |
| // it's from a previous page that got unloaded. |
| if (!doing_drag_and_drop_) |
| return; |
| GetPage()->GetDragController().DragEnded(); |
| doing_drag_and_drop_ = false; |
| } |
| |
| void WebFrameWidgetBase::StartDragging(WebReferrerPolicy policy, |
| const WebDragData& data, |
| WebDragOperationsMask mask, |
| const WebImage& drag_image, |
| const WebPoint& drag_image_offset) { |
| doing_drag_and_drop_ = true; |
| Client()->StartDragging(policy, data, mask, drag_image, drag_image_offset); |
| } |
| |
| WebDragOperation WebFrameWidgetBase::DragTargetDragEnterOrOver( |
| const WebFloatPoint& point_in_viewport, |
| const WebFloatPoint& screen_point, |
| DragAction drag_action, |
| int modifiers) { |
| DCHECK(current_drag_data_); |
| // TODO(paulmeyer): It shouldn't be possible for |m_currentDragData| to be |
| // null here, but this is somehow happening (rarely). This suggests that in |
| // some cases drag-over is happening before drag-enter, which should be |
| // impossible. This needs to be investigated further. Once fixed, the extra |
| // check for |!m_currentDragData| should be removed. (crbug.com/671504) |
| if (IgnoreInputEvents() || !current_drag_data_) { |
| CancelDrag(); |
| return kWebDragOperationNone; |
| } |
| |
| WebFloatPoint point_in_root_frame(ViewportToRootFrame(point_in_viewport)); |
| |
| current_drag_data_->SetModifiers(modifiers); |
| DragData drag_data(current_drag_data_.Get(), point_in_root_frame, |
| screen_point, |
| static_cast<DragOperation>(operations_allowed_)); |
| |
| DragSession drag_session; |
| drag_session = GetPage()->GetDragController().DragEnteredOrUpdated( |
| &drag_data, *ToCoreFrame(LocalRoot())); |
| |
| DragOperation drop_effect = drag_session.operation; |
| |
| // Mask the drop effect operation against the drag source's allowed |
| // operations. |
| if (!(drop_effect & drag_data.DraggingSourceOperationMask())) |
| drop_effect = kDragOperationNone; |
| |
| drag_operation_ = static_cast<WebDragOperation>(drop_effect); |
| |
| return drag_operation_; |
| } |
| |
| WebFloatPoint WebFrameWidgetBase::ViewportToRootFrame( |
| const WebFloatPoint& point_in_viewport) const { |
| return GetPage()->GetVisualViewport().ViewportToRootFrame(point_in_viewport); |
| } |
| |
| WebViewImpl* WebFrameWidgetBase::View() const { |
| return ToWebLocalFrameImpl(LocalRoot())->ViewImpl(); |
| } |
| |
| Page* WebFrameWidgetBase::GetPage() const { |
| return View()->GetPage(); |
| } |
| |
| void WebFrameWidgetBase::DidAcquirePointerLock() { |
| GetPage()->GetPointerLockController().DidAcquirePointerLock(); |
| |
| LocalFrame* focusedFrame = FocusedLocalFrameInWidget(); |
| if (focusedFrame) { |
| focusedFrame->GetEventHandler().ReleaseMousePointerCapture(); |
| } |
| } |
| |
| void WebFrameWidgetBase::DidNotAcquirePointerLock() { |
| GetPage()->GetPointerLockController().DidNotAcquirePointerLock(); |
| } |
| |
| void WebFrameWidgetBase::DidLosePointerLock() { |
| pointer_lock_gesture_token_ = nullptr; |
| GetPage()->GetPointerLockController().DidLosePointerLock(); |
| } |
| |
| void WebFrameWidgetBase::RequestDecode( |
| const PaintImage& image, |
| base::OnceCallback<void(bool)> callback) { |
| // If we have a LayerTreeView, propagate the request, otherwise fail it since |
| // otherwise it would remain in a unresolved and unrejected state. |
| if (WebLayerTreeView* layer_tree_view = GetLayerTreeView()) { |
| layer_tree_view->RequestDecode(image, std::move(callback)); |
| } else { |
| std::move(callback).Run(false); |
| } |
| } |
| |
| void WebFrameWidgetBase::Trace(blink::Visitor* visitor) { |
| visitor->Trace(current_drag_data_); |
| } |
| |
| // TODO(665924): Remove direct dispatches of mouse events from |
| // PointerLockController, instead passing them through EventHandler. |
| void WebFrameWidgetBase::PointerLockMouseEvent( |
| const WebCoalescedInputEvent& coalesced_event) { |
| const WebInputEvent& input_event = coalesced_event.Event(); |
| const WebMouseEvent& mouse_event = |
| static_cast<const WebMouseEvent&>(input_event); |
| WebMouseEvent transformed_event = TransformWebMouseEvent( |
| ToWebLocalFrameImpl(LocalRoot())->GetFrameView(), mouse_event); |
| |
| LocalFrame* focusedFrame = FocusedLocalFrameInWidget(); |
| if (focusedFrame) { |
| focusedFrame->GetEventHandler().ProcessPendingPointerCaptureForPointerLock( |
| transformed_event); |
| } |
| |
| std::unique_ptr<UserGestureIndicator> gesture_indicator; |
| AtomicString event_type; |
| switch (input_event.GetType()) { |
| case WebInputEvent::kMouseDown: |
| event_type = EventTypeNames::mousedown; |
| if (!GetPage() || !GetPage()->GetPointerLockController().GetElement()) |
| break; |
| gesture_indicator = |
| Frame::NotifyUserActivation(GetPage() |
| ->GetPointerLockController() |
| .GetElement() |
| ->GetDocument() |
| .GetFrame(), |
| UserGestureToken::kNewGesture); |
| pointer_lock_gesture_token_ = gesture_indicator->CurrentToken(); |
| break; |
| case WebInputEvent::kMouseUp: |
| event_type = EventTypeNames::mouseup; |
| gesture_indicator = WTF::WrapUnique( |
| new UserGestureIndicator(std::move(pointer_lock_gesture_token_))); |
| break; |
| case WebInputEvent::kMouseMove: |
| event_type = EventTypeNames::mousemove; |
| break; |
| default: |
| NOTREACHED(); |
| } |
| |
| if (GetPage()) { |
| GetPage()->GetPointerLockController().DispatchLockedMouseEvent( |
| transformed_event, event_type); |
| } |
| } |
| |
| void WebFrameWidgetBase::ShowContextMenu(WebMenuSourceType source_type) { |
| if (!GetPage()) |
| return; |
| |
| GetPage()->GetContextMenuController().ClearContextMenu(); |
| { |
| ContextMenuAllowedScope scope; |
| if (LocalFrame* focused_frame = |
| GetPage()->GetFocusController().FocusedFrame()) { |
| focused_frame->GetEventHandler().ShowNonLocatedContextMenu(nullptr, |
| source_type); |
| } |
| } |
| } |
| |
| LocalFrame* WebFrameWidgetBase::FocusedLocalFrameInWidget() const { |
| if (!LocalRoot()) { |
| // WebFrameWidget is created in the call to CreateFrame. The corresponding |
| // RenderWidget, however, might not swap in right away (InstallNewDocument() |
| // will lead to it swapping in). During this interval LocalRoot() is nullptr |
| // (see https://crbug.com/792345). |
| return nullptr; |
| } |
| |
| LocalFrame* frame = GetPage()->GetFocusController().FocusedFrame(); |
| return (frame && frame->LocalFrameRoot() == ToCoreFrame(LocalRoot())) |
| ? frame |
| : nullptr; |
| } |
| |
| bool WebFrameWidgetBase::EndActiveFlingAnimation() { |
| if (gesture_animation_) { |
| gesture_animation_.reset(); |
| fling_source_device_ = kWebGestureDeviceUninitialized; |
| if (WebLayerTreeView* layer_tree_view = GetLayerTreeView()) |
| layer_tree_view->DidStopFlinging(); |
| return true; |
| } |
| return false; |
| } |
| |
| bool WebFrameWidgetBase::ScrollBy(const WebFloatSize& delta, |
| const WebFloatSize& velocity) { |
| DCHECK_NE(fling_source_device_, kWebGestureDeviceUninitialized); |
| |
| if (fling_source_device_ == kWebGestureDeviceTouchpad) { |
| bool enable_touchpad_scroll_latching = |
| RuntimeEnabledFeatures::TouchpadAndWheelScrollLatchingEnabled(); |
| WebMouseWheelEvent synthetic_wheel(WebInputEvent::kMouseWheel, |
| fling_modifier_, |
| WTF::CurrentTimeTicksInSeconds()); |
| const float kTickDivisor = WheelEvent::kTickMultiplier; |
| |
| synthetic_wheel.delta_x = delta.width; |
| synthetic_wheel.delta_y = delta.height; |
| synthetic_wheel.wheel_ticks_x = delta.width / kTickDivisor; |
| synthetic_wheel.wheel_ticks_y = delta.height / kTickDivisor; |
| synthetic_wheel.has_precise_scrolling_deltas = true; |
| synthetic_wheel.phase = WebMouseWheelEvent::kPhaseChanged; |
| synthetic_wheel.SetPositionInWidget(position_on_fling_start_.x, |
| position_on_fling_start_.y); |
| synthetic_wheel.SetPositionInScreen(global_position_on_fling_start_.x, |
| global_position_on_fling_start_.y); |
| |
| // TODO(wjmaclean): Is LocalRoot() the right frame to use here? |
| if (GetPageWidgetEventHandler()->HandleMouseWheel(*ToCoreFrame(LocalRoot()), |
| synthetic_wheel) != |
| WebInputEventResult::kNotHandled) { |
| return true; |
| } |
| |
| if (!enable_touchpad_scroll_latching) { |
| WebGestureEvent synthetic_scroll_begin = |
| CreateGestureScrollEventFromFling(WebInputEvent::kGestureScrollBegin, |
| kWebGestureDeviceTouchpad); |
| synthetic_scroll_begin.data.scroll_begin.delta_x_hint = delta.width; |
| synthetic_scroll_begin.data.scroll_begin.delta_y_hint = delta.height; |
| synthetic_scroll_begin.data.scroll_begin.inertial_phase = |
| WebGestureEvent::kMomentumPhase; |
| GetPageWidgetEventHandler()->HandleGestureEvent(synthetic_scroll_begin); |
| } |
| |
| WebGestureEvent synthetic_scroll_update = CreateGestureScrollEventFromFling( |
| WebInputEvent::kGestureScrollUpdate, kWebGestureDeviceTouchpad); |
| synthetic_scroll_update.data.scroll_update.delta_x = delta.width; |
| synthetic_scroll_update.data.scroll_update.delta_y = delta.height; |
| synthetic_scroll_update.data.scroll_update.velocity_x = velocity.width; |
| synthetic_scroll_update.data.scroll_update.velocity_y = velocity.height; |
| synthetic_scroll_update.data.scroll_update.inertial_phase = |
| WebGestureEvent::kMomentumPhase; |
| bool scroll_update_handled = |
| GetPageWidgetEventHandler()->HandleGestureEvent( |
| synthetic_scroll_update) != WebInputEventResult::kNotHandled; |
| |
| if (!enable_touchpad_scroll_latching) { |
| WebGestureEvent synthetic_scroll_end = CreateGestureScrollEventFromFling( |
| WebInputEvent::kGestureScrollEnd, kWebGestureDeviceTouchpad); |
| synthetic_scroll_end.data.scroll_end.inertial_phase = |
| WebGestureEvent::kMomentumPhase; |
| GetPageWidgetEventHandler()->HandleGestureEvent(synthetic_scroll_end); |
| } |
| |
| return scroll_update_handled; |
| } |
| |
| WebGestureEvent synthetic_gesture_event = CreateGestureScrollEventFromFling( |
| WebInputEvent::kGestureScrollUpdate, fling_source_device_); |
| synthetic_gesture_event.data.scroll_update.delta_x = delta.width; |
| synthetic_gesture_event.data.scroll_update.delta_y = delta.height; |
| synthetic_gesture_event.data.scroll_update.velocity_x = velocity.width; |
| synthetic_gesture_event.data.scroll_update.velocity_y = velocity.height; |
| synthetic_gesture_event.data.scroll_update.inertial_phase = |
| WebGestureEvent::kMomentumPhase; |
| |
| return GetPageWidgetEventHandler()->HandleGestureEvent( |
| synthetic_gesture_event) != WebInputEventResult::kNotHandled; |
| } |
| |
| WebInputEventResult WebFrameWidgetBase::HandleGestureFlingEvent( |
| const WebGestureEvent& event) { |
| WebInputEventResult event_result = WebInputEventResult::kNotHandled; |
| switch (event.GetType()) { |
| case WebInputEvent::kGestureFlingStart: { |
| if (event.source_device != kWebGestureDeviceSyntheticAutoscroll) |
| EndActiveFlingAnimation(); |
| position_on_fling_start_ = WebPoint(event.x, event.y); |
| global_position_on_fling_start_ = |
| WebPoint(event.global_x, event.global_y); |
| fling_modifier_ = event.GetModifiers(); |
| fling_source_device_ = event.source_device; |
| DCHECK_NE(fling_source_device_, kWebGestureDeviceUninitialized); |
| std::unique_ptr<WebGestureCurve> fling_curve = |
| Platform::Current()->CreateFlingAnimationCurve( |
| event.source_device, |
| WebFloatPoint(event.data.fling_start.velocity_x, |
| event.data.fling_start.velocity_y), |
| WebSize()); |
| DCHECK(fling_curve); |
| gesture_animation_ = WebActiveGestureAnimation::CreateWithTimeOffset( |
| std::move(fling_curve), this, event.TimeStampSeconds()); |
| ScheduleAnimation(); |
| |
| WebGestureEvent scaled_event = |
| TransformWebGestureEvent(ToCoreFrame(LocalRoot())->View(), event); |
| // Plugins may need to see GestureFlingStart to balance |
| // GestureScrollBegin (since the former replaces GestureScrollEnd when |
| // transitioning to a fling). |
| // TODO(dtapuska): Why isn't the response used? |
| ToCoreFrame(LocalRoot()) |
| ->GetEventHandler() |
| .HandleGestureScrollEvent(scaled_event); |
| |
| event_result = WebInputEventResult::kHandledSystem; |
| break; |
| } |
| case WebInputEvent::kGestureFlingCancel: |
| if (EndActiveFlingAnimation()) |
| event_result = WebInputEventResult::kHandledSuppressed; |
| |
| break; |
| default: |
| NOTREACHED(); |
| } |
| return event_result; |
| } |
| |
| WebLocalFrame* WebFrameWidgetBase::FocusedWebLocalFrameInWidget() const { |
| return WebLocalFrameImpl::FromFrame(FocusedLocalFrameInWidget()); |
| } |
| |
| WebGestureEvent WebFrameWidgetBase::CreateGestureScrollEventFromFling( |
| WebInputEvent::Type type, |
| WebGestureDevice source_device) const { |
| WebGestureEvent gesture_event(type, fling_modifier_, |
| WTF::CurrentTimeTicksInSeconds()); |
| gesture_event.source_device = source_device; |
| gesture_event.x = position_on_fling_start_.x; |
| gesture_event.y = position_on_fling_start_.y; |
| gesture_event.global_x = global_position_on_fling_start_.x; |
| gesture_event.global_y = global_position_on_fling_start_.y; |
| return gesture_event; |
| } |
| |
| bool WebFrameWidgetBase::IsFlinging() const { |
| return !!gesture_animation_; |
| } |
| |
| void WebFrameWidgetBase::UpdateGestureAnimation( |
| double last_frame_time_monotonic) { |
| if (!gesture_animation_) |
| return; |
| |
| if (gesture_animation_->Animate(last_frame_time_monotonic)) { |
| ScheduleAnimation(); |
| } else { |
| DCHECK_NE(fling_source_device_, kWebGestureDeviceUninitialized); |
| WebGestureDevice last_fling_source_device = fling_source_device_; |
| EndActiveFlingAnimation(); |
| |
| if (last_fling_source_device != kWebGestureDeviceSyntheticAutoscroll) { |
| WebGestureEvent end_scroll_event = CreateGestureScrollEventFromFling( |
| WebInputEvent::kGestureScrollEnd, last_fling_source_device); |
| ToCoreFrame(LocalRoot()) |
| ->GetEventHandler() |
| .HandleGestureScrollEnd(end_scroll_event); |
| } |
| } |
| } |
| |
| } // namespace blink |
