a43b838e11
nsLeafFrame only exists as an abstract superclass, and every subclass actually brings along its own Reflow impl, so nsLeafFrame's own impl is just dead code. This patch makes sure it's really dead code by leaving in the Reflow() decl with " = 0;" so the compiler will enforce that all concrete subclasses *do* have a more specific override (and that they don't just inherit the stub nsFrame impl from further up the ancestor chain, for example). MozReview-Commit-ID: Co36IpuaeOc
98 lines
3.4 KiB
C++
98 lines
3.4 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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/* base class for rendering objects that do not have child lists */
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#ifndef nsLeafFrame_h___
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#define nsLeafFrame_h___
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#include "mozilla/Attributes.h"
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#include "nsFrame.h"
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#include "nsDisplayList.h"
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/**
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* Abstract class that provides simple fixed-size layout for leaf objects
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* (e.g. images, form elements, etc.). Deriviations provide the implementation
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* of the GetDesiredSize method. The rendering method knows how to render
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* borders and backgrounds.
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*/
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class nsLeafFrame : public nsFrame {
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public:
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NS_DECL_ABSTRACT_FRAME(nsLeafFrame)
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// nsIFrame replacements
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virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsDisplayListSet& aLists) override {
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DO_GLOBAL_REFLOW_COUNT_DSP("nsLeafFrame");
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DisplayBorderBackgroundOutline(aBuilder, aLists);
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}
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/**
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* Both GetMinISize and GetPrefISize will return whatever GetIntrinsicISize
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* returns.
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*/
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virtual nscoord GetMinISize(gfxContext *aRenderingContext) override;
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virtual nscoord GetPrefISize(gfxContext *aRenderingContext) override;
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/**
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* Our auto size is just intrinsic width and intrinsic height.
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*/
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virtual mozilla::LogicalSize
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ComputeAutoSize(gfxContext* aRenderingContext,
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mozilla::WritingMode aWM,
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const mozilla::LogicalSize& aCBSize,
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nscoord aAvailableISize,
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const mozilla::LogicalSize& aMargin,
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const mozilla::LogicalSize& aBorder,
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const mozilla::LogicalSize& aPadding,
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ComputeSizeFlags aFlags) override;
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/**
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* Each of our subclasses should provide its own Reflow impl:
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*/
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virtual void Reflow(nsPresContext* aPresContext,
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ReflowOutput& aDesiredSize,
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const ReflowInput& aReflowInput,
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nsReflowStatus& aStatus) override = 0;
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virtual bool IsFrameOfType(uint32_t aFlags) const override
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{
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// We don't actually contain a block, but we do always want a
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// computed width, so tell a little white lie here.
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return nsFrame::IsFrameOfType(aFlags & ~(nsIFrame::eReplacedContainsBlock));
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}
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protected:
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nsLeafFrame(nsStyleContext* aContext, ClassID aID)
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: nsFrame(aContext, aID)
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{}
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virtual ~nsLeafFrame();
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/**
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* Return the intrinsic isize of the frame's content area. Note that this
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* should not include borders or padding and should not depend on the applied
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* styles.
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*/
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virtual nscoord GetIntrinsicISize() = 0;
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/**
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* Return the intrinsic bsize of the frame's content area. This should not
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* include border or padding. This will only matter if the specified bsize
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* is auto. Note that subclasses must either implement this or override
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* Reflow and ComputeAutoSize; the default Reflow and ComputeAutoSize impls
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* call this method.
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*/
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virtual nscoord GetIntrinsicBSize();
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/**
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* Set aDesiredSize to be the available size
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*/
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void SizeToAvailSize(const ReflowInput& aReflowInput,
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ReflowOutput& aDesiredSize);
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};
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#endif /* nsLeafFrame_h___ */
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