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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 */
#ifndef nsRangeFrame_h___
#define nsRangeFrame_h___
#include "mozilla/Attributes.h"
#include "mozilla/Decimal.h"
#include "mozilla/EventForwards.h"
#include "nsContainerFrame.h"
#include "nsIAnonymousContentCreator.h"
#include "nsIDOMEventListener.h"
#include "nsCOMPtr.h"
class nsDisplayRangeFocusRing;
namespace mozilla {
class PresShell;
namespace dom {
class Event;
} // namespace dom
} // namespace mozilla
class nsRangeFrame final : public nsContainerFrame,
public nsIAnonymousContentCreator {
friend nsIFrame* NS_NewRangeFrame(mozilla::PresShell* aPresShell,
ComputedStyle* aStyle);
friend class nsDisplayRangeFocusRing;
explicit nsRangeFrame(ComputedStyle* aStyle, nsPresContext* aPresContext);
virtual ~nsRangeFrame();
typedef mozilla::PseudoStyleType PseudoStyleType;
typedef mozilla::dom::Element Element;
// nsIFrame overrides
virtual void DestroyFrom(nsIFrame* aDestructRoot,
PostDestroyData& aPostDestroyData) override;
void BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists) override;
virtual void Reflow(nsPresContext* aPresContext, ReflowOutput& aDesiredSize,
const ReflowInput& aReflowInput,
nsReflowStatus& aStatus) override;
virtual nsresult GetFrameName(nsAString& aResult) const override {
return MakeFrameName(u"Range"_ns, aResult);
virtual mozilla::a11y::AccType AccessibleType() override;
// nsIAnonymousContentCreator
virtual nsresult CreateAnonymousContent(
nsTArray<ContentInfo>& aElements) override;
virtual void AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
uint32_t aFilter) override;
virtual nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
int32_t aModType) override;
virtual mozilla::LogicalSize ComputeAutoSize(
gfxContext* aRenderingContext, mozilla::WritingMode aWM,
const mozilla::LogicalSize& aCBSize, nscoord aAvailableISize,
const mozilla::LogicalSize& aMargin,
const mozilla::LogicalSize& aBorderPadding,
mozilla::ComputeSizeFlags aFlags) override;
virtual nscoord GetMinISize(gfxContext* aRenderingContext) override;
virtual nscoord GetPrefISize(gfxContext* aRenderingContext) override;
virtual bool IsFrameOfType(uint32_t aFlags) const override {
return nsContainerFrame::IsFrameOfType(
aFlags & ~(nsIFrame::eReplaced | nsIFrame::eReplacedContainsBlock));
* Returns true if the slider's thumb moves horizontally, or else false if it
* moves vertically.
bool IsHorizontal() const;
* Returns true if the slider is oriented along the inline axis.
bool IsInlineOriented() const {
return IsHorizontal() != GetWritingMode().IsVertical();
* Returns true if the slider's thumb moves right-to-left for increasing
* values; only relevant when IsHorizontal() is true.
bool IsRightToLeft() const {
return GetWritingMode().IsPhysicalRTL();
double GetMin() const;
double GetMax() const;
double GetValue() const;
* Returns the input element's value as a fraction of the difference between
* the input's minimum and its maximum (i.e. returns 0.0 when the value is
* the same as the minimum, and returns 1.0 when the value is the same as the
* maximum).
double GetValueAsFractionOfRange();
* Returns whether the frame and its child should use the native style.
bool ShouldUseNativeStyle() const;
mozilla::Decimal GetValueAtEventPoint(mozilla::WidgetGUIEvent* aEvent);
* Helper that's used when the value of the range changes to reposition the
* thumb, resize the range-progress element, and schedule a repaint. (This
* does not reflow, since the position and size of the thumb and
* range-progress element do not affect the position or size of any other
* frames.)
void UpdateForValueChange();
// Return our preferred size in the cross-axis (the axis perpendicular
// to the direction of movement of the thumb).
nscoord AutoCrossSize(mozilla::Length aEm);
nsresult MakeAnonymousDiv(Element** aResult, PseudoStyleType aPseudoType,
nsTArray<ContentInfo>& aElements);
// Helper function which reflows the anonymous div frames.
void ReflowAnonymousContent(nsPresContext* aPresContext,
ReflowOutput& aDesiredSize,
const ReflowInput& aReflowInput);
void DoUpdateThumbPosition(nsIFrame* aThumbFrame, const nsSize& aRangeSize);
void DoUpdateRangeProgressFrame(nsIFrame* aProgressFrame,
const nsSize& aRangeSize);
* The div used to show the ::-moz-range-track pseudo-element.
* @see nsRangeFrame::CreateAnonymousContent
nsCOMPtr<Element> mTrackDiv;
* The div used to show the ::-moz-range-progress pseudo-element, which is
* used to (optionally) style the specific chunk of track leading up to the
* thumb's current position.
* @see nsRangeFrame::CreateAnonymousContent
nsCOMPtr<Element> mProgressDiv;
* The div used to show the ::-moz-range-thumb pseudo-element.
* @see nsRangeFrame::CreateAnonymousContent
nsCOMPtr<Element> mThumbDiv;