forked from mirrors/gecko-dev
219 lines
7.8 KiB
C++
219 lines
7.8 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsSliderFrame_h__
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#define nsSliderFrame_h__
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#include "mozilla/Attributes.h"
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#include "nsRepeatService.h"
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#include "nsBoxFrame.h"
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#include "nsAtom.h"
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#include "nsCOMPtr.h"
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#include "nsITimer.h"
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#include "nsIDOMEventListener.h"
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class nsITimer;
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class nsSliderFrame;
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nsIFrame* NS_NewSliderFrame(nsIPresShell* aPresShell,
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mozilla::ComputedStyle* aStyle);
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class nsSliderMediator final : public nsIDOMEventListener {
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public:
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NS_DECL_ISUPPORTS
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nsSliderFrame* mSlider;
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explicit nsSliderMediator(nsSliderFrame* aSlider) { mSlider = aSlider; }
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virtual void SetSlider(nsSliderFrame* aSlider) { mSlider = aSlider; }
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NS_DECL_NSIDOMEVENTLISTENER
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protected:
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virtual ~nsSliderMediator() {}
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};
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class nsSliderFrame final : public nsBoxFrame {
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public:
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NS_DECL_FRAMEARENA_HELPERS(nsSliderFrame)
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NS_DECL_QUERYFRAME
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friend class nsSliderMediator;
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explicit nsSliderFrame(ComputedStyle* aStyle, nsPresContext* aPresContext);
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virtual ~nsSliderFrame();
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#ifdef DEBUG_FRAME_DUMP
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virtual nsresult GetFrameName(nsAString& aResult) const override {
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return MakeFrameName(NS_LITERAL_STRING("SliderFrame"), aResult);
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}
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#endif
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virtual nsSize GetXULPrefSize(nsBoxLayoutState& aBoxLayoutState) override;
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virtual nsSize GetXULMinSize(nsBoxLayoutState& aBoxLayoutState) override;
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virtual nsSize GetXULMaxSize(nsBoxLayoutState& aBoxLayoutState) override;
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NS_IMETHOD DoXULLayout(nsBoxLayoutState& aBoxLayoutState) override;
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// nsIFrame overrides
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virtual void DestroyFrom(nsIFrame* aDestructRoot,
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PostDestroyData& aPostDestroyData) override;
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virtual void BuildDisplayListForChildren(
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nsDisplayListBuilder* aBuilder, const nsDisplayListSet& aLists) override;
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virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsDisplayListSet& aLists) override;
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virtual nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
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int32_t aModType) override;
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virtual void Init(nsIContent* aContent, nsContainerFrame* aParent,
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nsIFrame* asPrevInFlow) override;
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virtual nsresult HandleEvent(nsPresContext* aPresContext,
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mozilla::WidgetGUIEvent* aEvent,
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nsEventStatus* aEventStatus) override;
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// nsContainerFrame overrides
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virtual void SetInitialChildList(ChildListID aListID,
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nsFrameList& aChildList) override;
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virtual void AppendFrames(ChildListID aListID,
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nsFrameList& aFrameList) override;
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virtual void InsertFrames(ChildListID aListID, nsIFrame* aPrevFrame,
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nsFrameList& aFrameList) override;
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virtual void RemoveFrame(ChildListID aListID, nsIFrame* aOldFrame) override;
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nsresult StartDrag(mozilla::dom::Event* aEvent);
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nsresult StopDrag();
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void StartAPZDrag(mozilla::WidgetGUIEvent* aEvent);
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static int32_t GetCurrentPosition(nsIContent* content);
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static int32_t GetMinPosition(nsIContent* content);
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static int32_t GetMaxPosition(nsIContent* content);
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static int32_t GetIncrement(nsIContent* content);
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static int32_t GetPageIncrement(nsIContent* content);
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static int32_t GetIntegerAttribute(nsIContent* content, nsAtom* atom,
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int32_t defaultValue);
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void EnsureOrient();
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NS_IMETHOD HandlePress(nsPresContext* aPresContext,
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mozilla::WidgetGUIEvent* aEvent,
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nsEventStatus* aEventStatus) override;
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NS_IMETHOD HandleMultiplePress(nsPresContext* aPresContext,
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mozilla::WidgetGUIEvent* aEvent,
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nsEventStatus* aEventStatus,
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bool aControlHeld) override {
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return NS_OK;
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}
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NS_IMETHOD HandleDrag(nsPresContext* aPresContext,
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mozilla::WidgetGUIEvent* aEvent,
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nsEventStatus* aEventStatus) override {
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return NS_OK;
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}
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NS_IMETHOD HandleRelease(nsPresContext* aPresContext,
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mozilla::WidgetGUIEvent* aEvent,
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nsEventStatus* aEventStatus) override;
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// Return the ratio the scrollbar thumb should move in proportion to the
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// scrolled frame.
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float GetThumbRatio() const;
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// Notify the slider frame that an async scrollbar drag was started on the
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// APZ side without consulting the main thread. The block id is the APZ
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// input block id of the mousedown that started the drag.
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void AsyncScrollbarDragInitiated(uint64_t aDragBlockId);
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// Notify the slider frame that an async scrollbar drag requested in
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// StartAPZDrag() was rejected by APZ, and the slider frame should
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// fall back to main-thread dragging.
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void AsyncScrollbarDragRejected();
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bool OnlySystemGroupDispatch(mozilla::EventMessage aMessage) const override;
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// Returns the associated scrollframe that contains this slider if any.
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nsIScrollableFrame* GetScrollFrame();
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private:
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bool GetScrollToClick();
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nsIFrame* GetScrollbar();
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bool ShouldScrollForEvent(mozilla::WidgetGUIEvent* aEvent);
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bool ShouldScrollToClickForEvent(mozilla::WidgetGUIEvent* aEvent);
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bool IsEventOverThumb(mozilla::WidgetGUIEvent* aEvent);
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void PageUpDown(nscoord change);
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void SetCurrentThumbPosition(nsIContent* aScrollbar, nscoord aNewPos,
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bool aIsSmooth, bool aMaySnap);
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void SetCurrentPosition(nsIContent* aScrollbar, int32_t aNewPos,
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bool aIsSmooth);
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void SetCurrentPositionInternal(nsIContent* aScrollbar, int32_t pos,
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bool aIsSmooth);
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void CurrentPositionChanged();
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void DragThumb(bool aGrabMouseEvents);
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void AddListener();
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void RemoveListener();
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bool isDraggingThumb() const;
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void SuppressDisplayport();
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void UnsuppressDisplayport();
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void StartRepeat() {
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nsRepeatService::GetInstance()->Start(Notify, this, mContent->OwnerDoc(),
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NS_LITERAL_CSTRING("nsSliderFrame"));
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}
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void StopRepeat() { nsRepeatService::GetInstance()->Stop(Notify, this); }
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void Notify();
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static void Notify(void* aData) {
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(static_cast<nsSliderFrame*>(aData))->Notify();
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}
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void PageScroll(nscoord aChange);
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nsPoint mDestinationPoint;
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RefPtr<nsSliderMediator> mMediator;
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float mRatio;
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nscoord mDragStart;
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nscoord mThumbStart;
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int32_t mCurPos;
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nscoord mChange;
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bool mDragFinished;
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// true if an attribute change has been caused by the user manipulating the
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// slider. This allows notifications to tell how a slider's current position
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// was changed.
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bool mUserChanged;
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// true if we've handed off the scrolling to APZ. This means that we should
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// ignore scrolling events as the position will be updated by APZ. If we were
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// to process these events then the scroll position update would conflict
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// causing the scroll position to jump.
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bool mScrollingWithAPZ;
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// true if displayport suppression is active, for more performant
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// scrollbar-dragging behaviour.
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bool mSuppressionActive;
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// If APZ initiated a scrollbar drag without main-thread involvement, it
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// notifies us and this variable stores the input block id of the APZ input
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// block that started the drag. This lets us handle the corresponding
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// mousedown event properly, if it arrives after the scroll position has
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// been shifted due to async scrollbar drag.
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Maybe<uint64_t> mAPZDragInitiated;
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static bool gMiddlePref;
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static int32_t gSnapMultiplier;
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}; // class nsSliderFrame
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#endif
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