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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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/. */
//
// nsScrollbarFrame
//
#ifndef nsScrollbarFrame_h__
#define nsScrollbarFrame_h__
#include "mozilla/Attributes.h"
#include "mozilla/ScrollTypes.h"
#include "nsContainerFrame.h"
#include "nsIAnonymousContentCreator.h"
class nsIScrollbarMediator;
namespace mozilla {
class PresShell;
namespace dom {
class Element;
}
} // namespace mozilla
nsIFrame* NS_NewScrollbarFrame(mozilla::PresShell* aPresShell,
mozilla::ComputedStyle* aStyle);
class nsScrollbarFrame final : public nsContainerFrame,
public nsIAnonymousContentCreator {
using Element = mozilla::dom::Element;
using CSSIntCoord = mozilla::CSSIntCoord;
public:
explicit nsScrollbarFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)
: nsContainerFrame(aStyle, aPresContext, kClassID) {}
NS_DECL_QUERYFRAME
NS_DECL_FRAMEARENA_HELPERS(nsScrollbarFrame)
#ifdef DEBUG_FRAME_DUMP
nsresult GetFrameName(nsAString& aResult) const override {
return MakeFrameName(u"ScrollbarFrame"_ns, aResult);
}
#endif
// nsIFrame overrides
NS_IMETHOD HandlePress(nsPresContext* aPresContext,
mozilla::WidgetGUIEvent* aEvent,
nsEventStatus* aEventStatus) override;
NS_IMETHOD HandleMultiplePress(nsPresContext* aPresContext,
mozilla::WidgetGUIEvent* aEvent,
nsEventStatus* aEventStatus,
bool aControlHeld) override;
MOZ_CAN_RUN_SCRIPT
NS_IMETHOD HandleDrag(nsPresContext* aPresContext,
mozilla::WidgetGUIEvent* aEvent,
nsEventStatus* aEventStatus) override;
NS_IMETHOD HandleRelease(nsPresContext* aPresContext,
mozilla::WidgetGUIEvent* aEvent,
nsEventStatus* aEventStatus) override;
mozilla::StyleScrollbarWidth ScrollbarWidth() const;
nscoord ScrollbarTrackSize() const;
nsSize ScrollbarMinSize() const;
bool IsHorizontal() const;
void Destroy(DestroyContext&) override;
void Init(nsIContent* aContent, nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) override;
void Reflow(nsPresContext* aPresContext, ReflowOutput& aDesiredSize,
const ReflowInput& aReflowInput,
nsReflowStatus& aStatus) override;
void SetOverrideScrollbarMediator(nsIScrollbarMediator*);
nsIScrollbarMediator* GetScrollbarMediator();
void WillBecomeActive();
void MoveToNewPosition();
int32_t GetButtonScrollDirection() const { return mButtonScrollDirection; }
void SetButtonScrollDirectionAndUnit(int32_t aDirection,
mozilla::ScrollUnit aUnit) {
mButtonScrollDirection = aDirection;
mButtonScrollUnit = aUnit;
}
// nsIAnonymousContentCreator
nsresult CreateAnonymousContent(nsTArray<ContentInfo>& aElements) override;
void AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
uint32_t aFilter) override;
void ElementStateChanged(mozilla::dom::ElementState) override;
bool HasBeenHovered() const { return mHasBeenHovered; }
// If we're an horizontal scrollbar, get the vertical one, or viceversa.
nsScrollbarFrame* GetOppositeScrollbar() const;
void ActivityChanged(bool aIsNowActive);
// Sets the current scrollbar position. Returns true if the value changed.
bool SetCurPos(CSSIntCoord);
CSSIntCoord GetCurPos() const { return mCurPos; }
bool SetMaxPos(CSSIntCoord);
CSSIntCoord GetMaxPos() const { return mMaxPos; }
bool SetPageIncrement(CSSIntCoord);
CSSIntCoord GetPageIncrement() const { return mPageIncrement; }
bool SetEnabled(bool);
bool IsEnabled() const;
bool IsDisabled() const { return !IsEnabled(); }
protected:
void InvalidateForHoverChange(bool aIsNowHovered);
void RequestSliderReflow();
// TODO(emilio): These probably shouldn't be CSSIntCoords (could just be
// nscoords).
CSSIntCoord mCurPos = 0;
CSSIntCoord mMaxPos = 0;
CSSIntCoord mPageIncrement = 0;
// Direction and unit that our button scrolled us to.
// TODO(emilio): Find a better place to store this?
int32_t mButtonScrollDirection = 0;
mozilla::ScrollUnit mButtonScrollUnit = mozilla::ScrollUnit::DEVICE_PIXELS;
// On macOS, overlay scrollbar hover state should be sticky (remain hovered
// while we've been hovered at least once).
bool mHasBeenHovered = false;
private:
WeakFrame mOverriddenScrollbarMediator;
nsCOMPtr<Element> mUpTopButton;
nsCOMPtr<Element> mDownTopButton;
nsCOMPtr<Element> mSlider;
nsCOMPtr<Element> mThumb;
nsCOMPtr<Element> mUpBottomButton;
nsCOMPtr<Element> mDownBottomButton;
}; // class nsScrollbarFrame
#endif
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