зеркало из https://github.com/mozilla/gecko-dev.git
121 строка
4.2 KiB
C++
121 строка
4.2 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 nsRangeFrame_h___
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#define nsRangeFrame_h___
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#include "mozilla/Attributes.h"
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#include "nsContainerFrame.h"
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#include "nsIAnonymousContentCreator.h"
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#include "nsCOMPtr.h"
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class nsBaseContentList;
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class nsRangeFrame : public nsContainerFrame,
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public nsIAnonymousContentCreator
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{
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friend nsIFrame*
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NS_NewRangeFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
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nsRangeFrame(nsStyleContext* aContext);
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virtual ~nsRangeFrame();
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public:
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NS_DECL_QUERYFRAME_TARGET(nsRangeFrame)
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NS_DECL_QUERYFRAME
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NS_DECL_FRAMEARENA_HELPERS
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// nsIFrame overrides
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virtual void DestroyFrom(nsIFrame* aDestructRoot) MOZ_OVERRIDE;
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void BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists) MOZ_OVERRIDE;
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NS_IMETHOD Reflow(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus) MOZ_OVERRIDE;
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#ifdef DEBUG
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NS_IMETHOD GetFrameName(nsAString& aResult) const MOZ_OVERRIDE {
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return MakeFrameName(NS_LITERAL_STRING("Range"), aResult);
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}
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#endif
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virtual bool IsLeaf() const MOZ_OVERRIDE { return true; }
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// nsIAnonymousContentCreator
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virtual nsresult CreateAnonymousContent(nsTArray<ContentInfo>& aElements) MOZ_OVERRIDE;
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virtual void AppendAnonymousContentTo(nsBaseContentList& aElements,
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uint32_t aFilter) MOZ_OVERRIDE;
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NS_IMETHOD AttributeChanged(int32_t aNameSpaceID,
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nsIAtom* aAttribute,
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int32_t aModType) MOZ_OVERRIDE;
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virtual nsSize ComputeAutoSize(nsRenderingContext *aRenderingContext,
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nsSize aCBSize, nscoord aAvailableWidth,
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nsSize aMargin, nsSize aBorder,
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nsSize aPadding, bool aShrinkWrap) MOZ_OVERRIDE;
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virtual nscoord GetMinWidth(nsRenderingContext *aRenderingContext) MOZ_OVERRIDE;
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virtual nscoord GetPrefWidth(nsRenderingContext *aRenderingContext) MOZ_OVERRIDE;
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virtual nsIAtom* GetType() const MOZ_OVERRIDE;
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virtual bool IsFrameOfType(uint32_t aFlags) const MOZ_OVERRIDE
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{
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return nsContainerFrame::IsFrameOfType(aFlags &
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~(nsIFrame::eReplaced | nsIFrame::eReplacedContainsBlock));
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}
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/**
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* Returns true if the slider's thumb moves horizontally, or else false if it
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* moves vertically.
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*
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* aOverrideFrameSize If specified, this will be used instead of the size of
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* the frame's rect (i.e. the frame's border-box size) if the frame's
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* rect would have otherwise been examined. This should only be specified
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* during reflow when the frame's [new] border-box size has not yet been
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* stored in its mRect.
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*/
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bool IsHorizontal(const nsSize *aFrameSizeOverride = nullptr) const;
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/**
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* Returns whether the frame and its child should use the native style.
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*/
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bool ShouldUseNativeStyle() const;
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private:
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// Helper function which reflows the anonymous div frames.
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nsresult ReflowAnonymousContent(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState);
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/**
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* Returns the input element's value as a fraction of the difference between
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* the input's minimum and its maximum (i.e. returns 0.0 when the value is
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* the same as the minimum, and returns 1.0 when the value is the same as the
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* maximum).
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*/
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double GetValueAsFractionOfRange();
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/**
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* The div used to show the track.
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* @see nsRangeFrame::CreateAnonymousContent
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*/
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nsCOMPtr<nsIContent> mTrackDiv;
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/**
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* The div used to show the thumb.
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* @see nsRangeFrame::CreateAnonymousContent
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*/
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nsCOMPtr<nsIContent> mThumbDiv;
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};
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#endif
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