/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ #ifndef nsSliderFrame_h__ #define nsSliderFrame_h__ #include "mozilla/Attributes.h" #include "nsRepeatService.h" #include "nsBoxFrame.h" #include "nsIAtom.h" #include "nsCOMPtr.h" #include "nsITimer.h" #include "nsIDOMEventListener.h" class nsITimer; class nsSliderFrame; nsIFrame* NS_NewSliderFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); class nsSliderMediator final : public nsIDOMEventListener { public: NS_DECL_ISUPPORTS nsSliderFrame* mSlider; explicit nsSliderMediator(nsSliderFrame* aSlider) { mSlider = aSlider; } virtual void SetSlider(nsSliderFrame* aSlider) { mSlider = aSlider; } NS_IMETHOD HandleEvent(nsIDOMEvent* aEvent) override; protected: virtual ~nsSliderMediator() {} }; class nsSliderFrame : public nsBoxFrame { public: NS_DECL_FRAMEARENA_HELPERS NS_DECL_QUERYFRAME_TARGET(nsSliderFrame) NS_DECL_QUERYFRAME friend class nsSliderMediator; explicit nsSliderFrame(nsStyleContext* aContext); virtual ~nsSliderFrame(); #ifdef DEBUG_FRAME_DUMP virtual nsresult GetFrameName(nsAString& aResult) const override { return MakeFrameName(NS_LITERAL_STRING("SliderFrame"), aResult); } #endif virtual nsSize GetXULPrefSize(nsBoxLayoutState& aBoxLayoutState) override; virtual nsSize GetXULMinSize(nsBoxLayoutState& aBoxLayoutState) override; virtual nsSize GetXULMaxSize(nsBoxLayoutState& aBoxLayoutState) override; NS_IMETHOD DoXULLayout(nsBoxLayoutState& aBoxLayoutState) override; // nsIFrame overrides virtual void DestroyFrom(nsIFrame* aDestructRoot) override; virtual void BuildDisplayListForChildren(nsDisplayListBuilder* aBuilder, const nsRect& aDirtyRect, const nsDisplayListSet& aLists) override; virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder, const nsRect& aDirtyRect, const nsDisplayListSet& aLists) override; virtual nsresult AttributeChanged(int32_t aNameSpaceID, nsIAtom* aAttribute, int32_t aModType) override; virtual void Init(nsIContent* aContent, nsContainerFrame* aParent, nsIFrame* asPrevInFlow) override; virtual nsresult HandleEvent(nsPresContext* aPresContext, mozilla::WidgetGUIEvent* aEvent, nsEventStatus* aEventStatus) override; virtual nsIAtom* GetType() const override; // nsContainerFrame overrides virtual void SetInitialChildList(ChildListID aListID, nsFrameList& aChildList) override; virtual void AppendFrames(ChildListID aListID, nsFrameList& aFrameList) override; virtual void InsertFrames(ChildListID aListID, nsIFrame* aPrevFrame, nsFrameList& aFrameList) override; virtual void RemoveFrame(ChildListID aListID, nsIFrame* aOldFrame) override; nsresult StartDrag(nsIDOMEvent* aEvent); nsresult StopDrag(); bool StartAPZDrag(); static int32_t GetCurrentPosition(nsIContent* content); static int32_t GetMinPosition(nsIContent* content); static int32_t GetMaxPosition(nsIContent* content); static int32_t GetIncrement(nsIContent* content); static int32_t GetPageIncrement(nsIContent* content); static int32_t GetIntegerAttribute(nsIContent* content, nsIAtom* atom, int32_t defaultValue); void EnsureOrient(); NS_IMETHOD HandlePress(nsPresContext* aPresContext, mozilla::WidgetGUIEvent* aEvent, nsEventStatus* aEventStatus) override; NS_IMETHOD HandleMultiplePress(nsPresContext* aPresContext, mozilla::WidgetGUIEvent* aEvent, nsEventStatus* aEventStatus, bool aControlHeld) override { return NS_OK; } NS_IMETHOD HandleDrag(nsPresContext* aPresContext, mozilla::WidgetGUIEvent* aEvent, nsEventStatus* aEventStatus) override { return NS_OK; } NS_IMETHOD HandleRelease(nsPresContext* aPresContext, mozilla::WidgetGUIEvent* aEvent, nsEventStatus* aEventStatus) override; // Return the ratio the scrollbar thumb should move in proportion to the // scrolled frame. float GetThumbRatio() const; private: bool GetScrollToClick(); nsIFrame* GetScrollbar(); bool ShouldScrollForEvent(mozilla::WidgetGUIEvent* aEvent); bool ShouldScrollToClickForEvent(mozilla::WidgetGUIEvent* aEvent); bool IsEventOverThumb(mozilla::WidgetGUIEvent* aEvent); void PageUpDown(nscoord change); void SetCurrentThumbPosition(nsIContent* aScrollbar, nscoord aNewPos, bool aIsSmooth, bool aMaySnap); void SetCurrentPosition(nsIContent* aScrollbar, int32_t aNewPos, bool aIsSmooth); void SetCurrentPositionInternal(nsIContent* aScrollbar, int32_t pos, bool aIsSmooth); void CurrentPositionChanged(); void DragThumb(bool aGrabMouseEvents); void AddListener(); void RemoveListener(); bool isDraggingThumb(); void StartRepeat() { nsRepeatService::GetInstance()->Start(Notify, this); } void StopRepeat() { nsRepeatService::GetInstance()->Stop(Notify, this); } void Notify(); static void Notify(void* aData) { (static_cast<nsSliderFrame*>(aData))->Notify(); } void PageScroll(nscoord aChange); nsPoint mDestinationPoint; RefPtr<nsSliderMediator> mMediator; float mRatio; nscoord mDragStart; nscoord mThumbStart; int32_t mCurPos; nscoord mChange; bool mDragFinished; // true if an attribute change has been caused by the user manipulating the // slider. This allows notifications to tell how a slider's current position // was changed. bool mUserChanged; // true if we've handed off the scrolling to APZ. This means that we should // ignore scrolling events as the position will be updated by APZ. If we were // to process these events then the scroll position update would conflict // causing the scroll position to jump. bool mScrollingWithAPZ; // true if displayport suppression is active, for more performant // scrollbar-dragging behaviour. bool mSuppressionActive; static bool gMiddlePref; static int32_t gSnapMultiplier; }; // class nsSliderFrame #endif