layout/generic/nsBulletFrame.h
author Nika Layzell <nika@thelayzells.com>
Tue, 25 Sep 2018 17:34:53 +0200
changeset 507828 5e6dae0c1e5a4939ccd406f14607f7fafffd45a7
parent 488233 8e24328ba71484dd144b9d0d2fdd287a9327c1b4
child 508163 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
Bug 1448426 - Wrap windows.h to avoid problematic define statements, r=froydnj,glandium By default, windows.h exposes a large number of problematic define statements which are UpperCamelCase, such as a define from `CreateWindow` to `CreateWindow{A,W}`. As many of these names are generic (e.g. CreateFile, CreateWindow), they can mess up Gecko code that may legitimately have its own methods with the same names. The header also defines some traditional SCREAMING_SNAKE_CASE defines which can mess up our code by conflicting with local values. This patch adds a simple code generator which generates wrappers for these defines, and uses them to wrap the windows.h wrapper using the `stl_wrappers` mechanism, allowing us to use windows.h in more places. Differential Revision: https://phabricator.services.mozilla.com/D10932

/* -*- 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/. */

/* rendering object for list-item bullets */

#ifndef nsBulletFrame_h___
#define nsBulletFrame_h___

#include "mozilla/Attributes.h"
#include "nsFrame.h"

#include "imgIContainer.h"
#include "imgINotificationObserver.h"

class imgIContainer;
class imgRequestProxy;

class nsBulletFrame;
class BulletRenderer;

class nsBulletListener final : public imgINotificationObserver
{
public:
  nsBulletListener();

  NS_DECL_ISUPPORTS
  NS_DECL_IMGINOTIFICATIONOBSERVER

  void SetFrame(nsBulletFrame *frame) { mFrame = frame; }

private:
  virtual ~nsBulletListener();

  nsBulletFrame *mFrame;
};

/**
 * A simple class that manages the layout and rendering of html bullets.
 * This class also supports the CSS list-style properties.
 */
class nsBulletFrame final : public nsFrame {
  typedef mozilla::image::ImgDrawResult ImgDrawResult;

public:
  NS_DECL_FRAMEARENA_HELPERS(nsBulletFrame)
#ifdef DEBUG
  NS_DECL_QUERYFRAME
#endif

  explicit nsBulletFrame(ComputedStyle* aStyle)
    : nsFrame(aStyle, kClassID)
    , mPadding(GetWritingMode())
    , mIntrinsicSize(GetWritingMode())
    , mOrdinal(0)
    , mRequestRegistered(false)
  {}

  virtual ~nsBulletFrame();

  NS_IMETHOD Notify(imgIRequest* aRequest, int32_t aType, const nsIntRect* aData);

  // nsIFrame
  virtual void DestroyFrom(nsIFrame* aDestructRoot, PostDestroyData& aPostDestroyData) override;
  virtual void BuildDisplayList(nsDisplayListBuilder*   aBuilder,
                                const nsDisplayListSet& aLists) override;
  virtual void DidSetComputedStyle(ComputedStyle* aOldComputedStyle) override;
#ifdef DEBUG_FRAME_DUMP
  virtual nsresult GetFrameName(nsAString& aResult) const override;
#endif

  virtual void Reflow(nsPresContext* aPresContext,
                      ReflowOutput& aMetrics,
                      const ReflowInput& aReflowInput,
                      nsReflowStatus& aStatus) override;
  virtual nscoord GetMinISize(gfxContext *aRenderingContext) override;
  virtual nscoord GetPrefISize(gfxContext *aRenderingContext) override;
  void AddInlineMinISize(gfxContext* aRenderingContext,
                         nsIFrame::InlineMinISizeData* aData) override;
  void AddInlinePrefISize(gfxContext* aRenderingContext,
                          nsIFrame::InlinePrefISizeData* aData) override;

  virtual bool IsFrameOfType(uint32_t aFlags) const override
  {
    if (aFlags & (eSupportsCSSTransforms | eSupportsContainLayoutAndPaint)) {
      return false;
    }
    return nsFrame::IsFrameOfType(aFlags);
  }

  // nsBulletFrame
  int32_t SetListItemOrdinal(int32_t aNextOrdinal, bool* aChanged,
                             int32_t aIncrement);

  /* get list item text, with prefix & suffix */
  void GetListItemText(nsAString& aResult);

  void GetSpokenText(nsAString& aText);

  Maybe<BulletRenderer>
  CreateBulletRenderer(gfxContext& aRenderingContext, nsPoint aPt);
  ImgDrawResult PaintBullet(gfxContext& aRenderingContext, nsPoint aPt,
                         const nsRect& aDirtyRect, uint32_t aFlags,
                         bool aDisableSubpixelAA);

  virtual bool IsEmpty() override;
  virtual bool IsSelfEmpty() override;
  virtual nscoord GetLogicalBaseline(mozilla::WritingMode aWritingMode) const override;

  float GetFontSizeInflation() const;
  bool HasFontSizeInflation() const {
    return (GetStateBits() & BULLET_FRAME_HAS_FONT_INFLATION) != 0;
  }
  void SetFontSizeInflation(float aInflation);

  int32_t GetOrdinal() { return mOrdinal; }

  already_AddRefed<imgIContainer> GetImage() const;

protected:
  nsresult OnSizeAvailable(imgIRequest* aRequest, imgIContainer* aImage);

  void AppendSpacingToPadding(nsFontMetrics* aFontMetrics,
                              mozilla::LogicalMargin* aPadding);
  void GetDesiredSize(nsPresContext* aPresContext,
                      gfxContext *aRenderingContext,
                      ReflowOutput& aMetrics,
                      float aFontSizeInflation,
                      mozilla::LogicalMargin* aPadding);

  void GetLoadGroup(nsPresContext *aPresContext, nsILoadGroup **aLoadGroup);
  nsIDocument* GetOurCurrentDoc() const;

  mozilla::LogicalMargin mPadding;
  RefPtr<imgRequestProxy> mImageRequest;
  RefPtr<nsBulletListener> mListener;

  mozilla::LogicalSize mIntrinsicSize;
  int32_t mOrdinal;

private:
  void RegisterImageRequest(bool aKnownToBeAnimated);
  void DeregisterAndCancelImageRequest();

  // This is a boolean flag indicating whether or not the current image request
  // has been registered with the refresh driver.
  bool mRequestRegistered : 1;
};

#endif /* nsBulletFrame_h___ */