gecko-dev/layout/forms/nsFieldSetFrame.h

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 nsFieldSetFrame_h___
#define nsFieldSetFrame_h___

#include "mozilla/Attributes.h"
#include "ImgDrawResult.h"
#include "nsContainerFrame.h"

class nsFieldSetFrame final : public nsContainerFrame {
  typedef mozilla::image::ImgDrawResult ImgDrawResult;

 public:
  NS_DECL_FRAMEARENA_HELPERS(nsFieldSetFrame)

  explicit nsFieldSetFrame(ComputedStyle* aStyle);

  nscoord GetIntrinsicISize(gfxContext* aRenderingContext,
                            nsLayoutUtils::IntrinsicISizeType);
  virtual nscoord GetMinISize(gfxContext* aRenderingContext) override;
  virtual nscoord GetPrefISize(gfxContext* aRenderingContext) override;

  /**
   * The area to paint box-shadows around.  It's the border rect except
   * when there's a <legend> we offset the y-position to the center of it.
   */
  virtual nsRect VisualBorderRectRelativeToSelf() const override;

  virtual void Reflow(nsPresContext* aPresContext, ReflowOutput& aDesiredSize,
                      const ReflowInput& aReflowInput,
                      nsReflowStatus& aStatus) override;

  nscoord GetLogicalBaseline(mozilla::WritingMode aWM) const override;
  bool GetVerticalAlignBaseline(mozilla::WritingMode aWM,
                                nscoord* aBaseline) const override;
  bool GetNaturalBaselineBOffset(mozilla::WritingMode aWM,
                                 BaselineSharingGroup aBaselineGroup,
                                 nscoord* aBaseline) const override;

  virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
                                const nsDisplayListSet& aLists) override;

  ImgDrawResult PaintBorder(nsDisplayListBuilder* aBuilder,
                            gfxContext& aRenderingContext, nsPoint aPt,
                            const nsRect& aDirtyRect);

#ifdef DEBUG
  virtual void SetInitialChildList(ChildListID aListID,
                                   nsFrameList& aChildList) override;
  virtual void AppendFrames(ChildListID aListID,
                            nsFrameList& aFrameList) override;
  virtual void InsertFrames(ChildListID aListID, nsIFrame* aPrevFrame,
                            nsFrameList& aFrameList) override;
  virtual void RemoveFrame(ChildListID aListID, nsIFrame* aOldFrame) override;
#endif

  virtual bool IsFrameOfType(uint32_t aFlags) const override {
    return nsContainerFrame::IsFrameOfType(
        aFlags & ~nsIFrame::eCanContainOverflowContainers);
  }
  virtual nsIScrollableFrame* GetScrollTargetFrame() override {
    return do_QueryFrame(GetInner());
  }

  // Return the block wrapper around our kids.
  void AppendDirectlyOwnedAnonBoxes(nsTArray<OwnedAnonBox>& aResult) override;

#ifdef ACCESSIBILITY
  virtual mozilla::a11y::AccType AccessibleType() override;
#endif

#ifdef DEBUG_FRAME_DUMP
  virtual nsresult GetFrameName(nsAString& aResult) const override {
    return MakeFrameName(NS_LITERAL_STRING("FieldSet"), aResult);
  }
#endif

  /**
   * Return the anonymous frame that contains all descendants except
   * the legend frame.  This is currently always a block frame with
   * pseudo nsCSSAnonBoxes::fieldsetContent() -- this may change in the
   * future when we add support for CSS overflow for <fieldset>.  This really
   * can't return null, though callers seem to feel that it can.
   */
  nsIFrame* GetInner() const;

  /**
   * Return the frame that represents the legend if any.  This may be
   * a nsLegendFrame or a nsHTMLScrollFrame with the nsLegendFrame as the
   * scrolled frame (aka content insertion frame).
   */
  nsIFrame* GetLegend() const;

 protected:
  mozilla::LogicalRect mLegendRect;
  nscoord mLegendSpace;
};

#endif  // nsFieldSetFrame_h___