6af05a0977
This patch changes the signature to `GetMinISize()`, `GetPrefISize()`, `IntrinsicISize` by adding a helper struct as a preparation. Then we can just add more data such as a percentage basis to the struct without altering the signature in the future. When passing `IntrinsicSizeInput` struct down to another helper method, we generally just pass the original one if the method is computing the intrinsic size of our own or our anonymous children. If the method is computing our children's intrinsic contribution, we'll need to create a brand new `IntrinsicSizeInput` for our children. Differential Revision: https://phabricator.services.mozilla.com/D219521
121 lines
4.1 KiB
C++
121 lines
4.1 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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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/*
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* rendering object that is the root of the frame tree, which contains
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* contains fixed-positioned elements
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*/
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#ifndef mozilla_ViewportFrame_h
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#define mozilla_ViewportFrame_h
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#include "mozilla/Attributes.h"
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#include "nsContainerFrame.h"
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class nsPresContext;
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namespace mozilla {
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class nsDisplayWrapList;
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class ServoRestyleState;
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/**
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* ViewportFrame is the parent of a single child -- the root canvas frame or a
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* scroll container frame containing the root canvas frame. See
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* nsCSSFrameConstructor::SetUpDocElementContainingBlock() for the root frame
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* hierarchy. ViewportFrame stores this child in its primary child list.
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*/
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class ViewportFrame : public nsContainerFrame {
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public:
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NS_DECL_QUERYFRAME
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NS_DECL_FRAMEARENA_HELPERS(ViewportFrame)
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explicit ViewportFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)
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: ViewportFrame(aStyle, aPresContext, kClassID) {}
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virtual ~ViewportFrame() = default; // useful for debugging
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void Init(nsIContent* aContent, nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow) override;
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#ifdef DEBUG
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void AppendFrames(ChildListID aListID, nsFrameList&& aFrameList) override;
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void InsertFrames(ChildListID aListID, nsIFrame* aPrevFrame,
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const nsLineList::iterator* aPrevFrameLine,
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nsFrameList&& aFrameList) override;
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void RemoveFrame(DestroyContext&, ChildListID, nsIFrame*) override;
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#endif
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void BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsDisplayListSet& aLists) override;
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nsDisplayWrapList* BuildDisplayListForTopLayer(nsDisplayListBuilder* aBuilder,
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bool* aIsOpaque = nullptr);
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nscoord IntrinsicISize(const IntrinsicSizeInput& aInput,
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IntrinsicISizeType aType) override;
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void Reflow(nsPresContext* aPresContext, ReflowOutput& aDesiredSize,
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const ReflowInput& aReflowInput,
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nsReflowStatus& aStatus) override;
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bool ComputeCustomOverflow(mozilla::OverflowAreas&) override { return false; }
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/**
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* Adjust aReflowInput to account for scrollbars and pres shell
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* GetVisualViewportSizeSet and
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* GetContentDocumentFixedPositionMargins adjustments.
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* @return the rect to use as containing block rect
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*/
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nsRect AdjustReflowInputAsContainingBlock(ReflowInput* aReflowInput) const;
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/**
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* Update our style (and recursively the styles of any anonymous boxes we
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* might own)
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*/
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void UpdateStyle(ServoRestyleState& aStyleSet);
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/**
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* Return our single anonymous box child.
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*/
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void AppendDirectlyOwnedAnonBoxes(nsTArray<OwnedAnonBox>& aResult) override;
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// Returns adjusted viewport size to reflect the positions that position:fixed
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// elements are attached.
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nsSize AdjustViewportSizeForFixedPosition(const nsRect& aViewportRect) const;
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#ifdef DEBUG_FRAME_DUMP
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virtual nsresult GetFrameName(nsAString& aResult) const override;
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#endif
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protected:
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ViewportFrame(ComputedStyle* aStyle, nsPresContext* aPresContext, ClassID aID)
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: nsContainerFrame(aStyle, aPresContext, aID), mView(nullptr) {}
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/**
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* Calculate how much room is available for fixed frames. That means
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* determining if the viewport is scrollable and whether the vertical and/or
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* horizontal scrollbars are visible. Adjust the computed isize/bsize and
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* available isize for aReflowInput accordingly.
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* @return the current scroll position, or (0,0) if not scrollable.
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*/
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nsPoint AdjustReflowInputForScrollbars(ReflowInput* aReflowInput) const;
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nsView* GetViewInternal() const override { return mView; }
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void SetViewInternal(nsView* aView) override { mView = aView; }
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private:
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mozilla::FrameChildListID GetAbsoluteListID() const override {
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return FrameChildListID::Fixed;
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}
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nsView* mView;
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};
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} // namespace mozilla
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#endif // mozilla_ViewportFrame_h
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