tor-browser

The Tor Browser
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nsFieldSetFrame.h (4356B)

      1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
      3 /* This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this
      5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 #ifndef nsFieldSetFrame_h___
      8 #define nsFieldSetFrame_h___
      9 
     10 #include "ImgDrawResult.h"
     11 #include "nsContainerFrame.h"
     12 
     13 namespace mozilla {
     14 class ScrollContainerFrame;
     15 }  // namespace mozilla
     16 
     17 class nsFieldSetFrame final : public nsContainerFrame {
     18  typedef mozilla::image::ImgDrawResult ImgDrawResult;
     19 
     20 public:
     21  NS_DECL_FRAMEARENA_HELPERS(nsFieldSetFrame)
     22  NS_DECL_QUERYFRAME
     23 
     24  explicit nsFieldSetFrame(ComputedStyle* aStyle, nsPresContext* aPresContext);
     25 
     26  nscoord IntrinsicISize(const mozilla::IntrinsicSizeInput& aInput,
     27                         mozilla::IntrinsicISizeType aType) override;
     28 
     29  /**
     30   * The area to paint box-shadows around.  It's the border rect except
     31   * when there's a <legend> we offset the y-position to the center of it.
     32   */
     33  nsRect VisualBorderRectRelativeToSelf() const override;
     34 
     35  void Reflow(nsPresContext* aPresContext, ReflowOutput& aDesiredSize,
     36              const ReflowInput& aReflowInput,
     37              nsReflowStatus& aStatus) override;
     38 
     39  nscoord SynthesizeFallbackBaseline(
     40      mozilla::WritingMode aWM,
     41      BaselineSharingGroup aBaselineGroup) const override;
     42  BaselineSharingGroup GetDefaultBaselineSharingGroup() const override;
     43  Maybe<nscoord> GetNaturalBaselineBOffset(
     44      mozilla::WritingMode aWM, BaselineSharingGroup aBaselineGroup,
     45      BaselineExportContext aExportContext) const override;
     46 
     47  void BuildDisplayList(nsDisplayListBuilder* aBuilder,
     48                        const nsDisplayListSet& aLists) override;
     49 
     50  ImgDrawResult PaintBorder(nsDisplayListBuilder* aBuilder,
     51                            gfxContext& aRenderingContext, nsPoint aPt,
     52                            const nsRect& aDirtyRect);
     53 
     54  void SetInitialChildList(ChildListID aListID,
     55                           nsFrameList&& aChildList) override;
     56  void AppendFrames(ChildListID aListID, nsFrameList&& aFrameList) override;
     57  void InsertFrames(ChildListID aListID, nsIFrame* aPrevFrame,
     58                    const nsLineList::iterator* aPrevFrameLine,
     59                    nsFrameList&& aFrameList) override;
     60 #ifdef DEBUG
     61  void RemoveFrame(DestroyContext&, ChildListID aListID,
     62                   nsIFrame* aOldFrame) override;
     63 #endif
     64 
     65  mozilla::ScrollContainerFrame* GetScrollTargetFrame() const override;
     66 
     67  // Return the block wrapper around our kids.
     68  void AppendDirectlyOwnedAnonBoxes(nsTArray<OwnedAnonBox>& aResult) override;
     69 
     70 #ifdef ACCESSIBILITY
     71  virtual mozilla::a11y::AccType AccessibleType() override;
     72 #endif
     73 
     74 #ifdef DEBUG_FRAME_DUMP
     75  virtual nsresult GetFrameName(nsAString& aResult) const override {
     76    return MakeFrameName(u"FieldSet"_ns, aResult);
     77  }
     78 #endif
     79 
     80  /**
     81   * Return the anonymous frame that contains all descendants except the legend
     82   * frame.  This can be a block/grid/flex/scroll frame.  It always has
     83   * the pseudo type nsCSSAnonBoxes::fieldsetContent.  If it's a scroll frame,
     84   * the scrolled frame can be a block/grid/flex frame.
     85   * This may return null, for example for a fieldset that is a true overflow
     86   * container.
     87   */
     88  nsContainerFrame* GetInner() const;
     89 
     90  nsContainerFrame* GetContentInsertionFrame() override {
     91    if (auto* inner = GetInner()) {
     92      return inner->GetContentInsertionFrame();
     93    }
     94    return this;
     95  }
     96 
     97  /**
     98   * Return the frame that represents the rendered legend if any.
     99   * https://html.spec.whatwg.org/multipage/rendering.html#rendered-legend
    100   */
    101  nsIFrame* GetLegend() const;
    102 
    103  /** @see mLegendSpace below */
    104  nscoord LegendSpace() const { return mLegendSpace; }
    105 
    106 protected:
    107  /**
    108   * Convenience method to create a continuation for aChild after we've
    109   * reflowed it and got the reflow status aStatus.
    110   */
    111  void EnsureChildContinuation(nsIFrame* aChild, const nsReflowStatus& aStatus);
    112 
    113  mozilla::LogicalRect mLegendRect;
    114 
    115  // This is how much to subtract from our inner frame's content-box block-size
    116  // to account for a protruding legend.  It's zero if there's no legend or
    117  // the legend fits entirely inside our start border.
    118  nscoord mLegendSpace;
    119 };
    120 
    121 #endif  // nsFieldSetFrame_h___