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/* -*- 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 nsRangeFrame_h___
#define nsRangeFrame_h___
#include "mozilla/Attributes.h"
#include "mozilla/Decimal.h"
#include "nsContainerFrame.h"
#include "nsIAnonymousContentCreator.h"
#include "nsCOMPtr.h"
class nsBaseContentList;
class nsGUIEvent;
class nsRangeFrame : public nsContainerFrame,
public nsIAnonymousContentCreator
{
friend nsIFrame*
NS_NewRangeFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
nsRangeFrame(nsStyleContext* aContext);
virtual ~nsRangeFrame();
public:
NS_DECL_QUERYFRAME_TARGET(nsRangeFrame)
NS_DECL_QUERYFRAME
NS_DECL_FRAMEARENA_HELPERS
// nsIFrame overrides
virtual void Init(nsIContent* aContent,
nsIFrame* aParent,
nsIFrame* aPrevInFlow) MOZ_OVERRIDE;
virtual void DestroyFrom(nsIFrame* aDestructRoot) MOZ_OVERRIDE;
void BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists) MOZ_OVERRIDE;
NS_IMETHOD Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus) MOZ_OVERRIDE;
#ifdef DEBUG
NS_IMETHOD GetFrameName(nsAString& aResult) const MOZ_OVERRIDE {
return MakeFrameName(NS_LITERAL_STRING("Range"), aResult);
}
#endif
virtual bool IsLeaf() const MOZ_OVERRIDE { return true; }
#ifdef ACCESSIBILITY
virtual mozilla::a11y::AccType AccessibleType() MOZ_OVERRIDE;
#endif
// nsIAnonymousContentCreator
virtual nsresult CreateAnonymousContent(nsTArray<ContentInfo>& aElements) MOZ_OVERRIDE;
virtual void AppendAnonymousContentTo(nsBaseContentList& aElements,
uint32_t aFilter) MOZ_OVERRIDE;
NS_IMETHOD AttributeChanged(int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType) MOZ_OVERRIDE;
virtual nsSize ComputeAutoSize(nsRenderingContext *aRenderingContext,
nsSize aCBSize, nscoord aAvailableWidth,
nsSize aMargin, nsSize aBorder,
nsSize aPadding, bool aShrinkWrap) MOZ_OVERRIDE;
virtual nscoord GetMinWidth(nsRenderingContext *aRenderingContext) MOZ_OVERRIDE;
virtual nscoord GetPrefWidth(nsRenderingContext *aRenderingContext) MOZ_OVERRIDE;
virtual nsIAtom* GetType() const MOZ_OVERRIDE;
virtual bool IsFrameOfType(uint32_t aFlags) const MOZ_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.
*
* aOverrideFrameSize If specified, this will be used instead of the size of
* the frame's rect (i.e. the frame's border-box size) if the frame's
* rect would have otherwise been examined. This should only be specified
* during reflow when the frame's [new] border-box size has not yet been
* stored in its mRect.
*/
bool IsHorizontal(const nsSize *aFrameSizeOverride = nullptr) const;
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(nsGUIEvent* 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();
private:
nsresult MakeAnonymousDiv(nsIContent** aResult,
nsCSSPseudoElements::Type aPseudoType,
nsTArray<ContentInfo>& aElements);
// Helper function which reflows the anonymous div frames.
nsresult ReflowAnonymousContent(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState);
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<nsIContent> 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<nsIContent> mProgressDiv;
/**
* The div used to show the ::-moz-range-thumb pseudo-element.
* @see nsRangeFrame::CreateAnonymousContent
*/
nsCOMPtr<nsIContent> mThumbDiv;
};
#endif
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