SVGImageFrame.h - mozsearch

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/* -*- 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 LAYOUT_SVG_SVGIMAGEFRAME_H_

#define LAYOUT_SVG_SVGIMAGEFRAME_H_

// Keep in (case-insensitive) order:

#include "mozilla/gfx/2D.h"

#include "mozilla/DisplaySVGItem.h"

#include "mozilla/ISVGDisplayableFrame.h"

#include "gfxContext.h"

#include "gfxPlatform.h"

#include "imgIContainer.h"

#include "nsContainerFrame.h"

#include "imgINotificationObserver.h"

#include "nsIReflowCallback.h"

namespace mozilla {

class DisplaySVGImage;

class PresShell;

}  // namespace mozilla

nsIFrame* NS_NewSVGImageFrame(mozilla::PresShell* aPresShell,

                              mozilla::ComputedStyle* aStyle);

namespace mozilla {

class SVGImageFrame final : public nsIFrame,

                            public ISVGDisplayableFrame,

                            public nsIReflowCallback {

  friend nsIFrame* ::NS_NewSVGImageFrame(mozilla::PresShell* aPresShell,

                                         ComputedStyle* aStyle);

  friend class DisplaySVGImage;

  bool CreateWebRenderCommands(wr::DisplayListBuilder& aBuilder,

                               wr::IpcResourceUpdateQueue& aResources,

                               const layers::StackingContextHelper& aSc,

                               layers::RenderRootStateManager* aManager,

                               nsDisplayListBuilder* aDisplayListBuilder,

                               DisplaySVGImage* aItem, bool aDryRun);

 private:

  explicit SVGImageFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)

      : nsIFrame(aStyle, aPresContext, kClassID),

        mReflowCallbackPosted(false),

        mForceSyncDecoding(false) {

    AddStateBits(NS_FRAME_SVG_LAYOUT | NS_FRAME_MAY_BE_TRANSFORMED);

    EnableVisibilityTracking();

  virtual ~SVGImageFrame();

 public:

  NS_DECL_QUERYFRAME

  NS_DECL_FRAMEARENA_HELPERS(SVGImageFrame)

  // ISVGDisplayableFrame interface:

  void PaintSVG(gfxContext& aContext, const gfxMatrix& aTransform,

                imgDrawingParams& aImgParams) override;

  nsIFrame* GetFrameForPoint(const gfxPoint& aPoint) override;

  void ReflowSVG() override;

  void NotifySVGChanged(uint32_t aFlags) override;

  SVGBBox GetBBoxContribution(const Matrix& aToBBoxUserspace,

                              uint32_t aFlags) override;

  bool IsDisplayContainer() override { return false; }

  // nsIFrame interface:

  void BuildDisplayList(nsDisplayListBuilder* aBuilder,

                        const nsDisplayListSet& aLists) override;

  nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,

                            int32_t aModType) override;

  void OnVisibilityChange(

      Visibility aNewVisibility,

      const Maybe<OnNonvisible>& aNonvisibleAction = Nothing()) override;

  void Init(nsIContent* aContent, nsContainerFrame* aParent,

            nsIFrame* aPrevInFlow) override;

  void Destroy(DestroyContext&) override;

  void DidSetComputedStyle(ComputedStyle* aOldStyle) final;

  bool IsSVGTransformed(Matrix* aOwnTransforms = nullptr,

                        Matrix* aFromParentTransforms = nullptr) const override;

  bool GetIntrinsicImageDimensions(gfx::Size& aSize,

                                   AspectRatio& aAspectRatio) const;

#ifdef DEBUG_FRAME_DUMP

  nsresult GetFrameName(nsAString& aResult) const override {

    return MakeFrameName(u"SVGImage"_ns, aResult);

#endif

  // nsIReflowCallback

  bool ReflowFinished() override;

  void ReflowCallbackCanceled() override;

  /// Always sync decode our image when painting if @aForce is true.

  void SetForceSyncDecoding(bool aForce) { mForceSyncDecoding = aForce; }

  // SVGImageFrame methods:

  bool IsInvisible() const;

 private:

  bool IgnoreHitTest() const;

  already_AddRefed<imgIRequest> GetCurrentRequest() const;

  gfx::Matrix GetRasterImageTransform(int32_t aNativeWidth,

                                      int32_t aNativeHeight);

  gfx::Matrix GetVectorImageTransform();

  bool TransformContextForPainting(gfxContext* aGfxContext,

                                   const gfxMatrix& aTransform);

  nsCOMPtr<imgINotificationObserver> mListener;

  nsCOMPtr<imgIContainer> mImageContainer;

  bool mReflowCallbackPosted;

  bool mForceSyncDecoding;

  friend class SVGImageListener;

};

//----------------------------------------------------------------------

// Display list item:

class DisplaySVGImage final : public DisplaySVGItem {

 public:

  DisplaySVGImage(nsDisplayListBuilder* aBuilder, SVGImageFrame* aFrame)

      : DisplaySVGItem(aBuilder, aFrame) {

    MOZ_COUNT_CTOR(DisplaySVGImage);

  MOZ_COUNTED_DTOR_OVERRIDE(DisplaySVGImage)

  NS_DISPLAY_DECL_NAME("DisplaySVGImage", TYPE_SVG_IMAGE)

  // Whether this part of the SVG should be natively handled by webrender,

  // potentially becoming an "active layer" inside a blob image.

  bool ShouldBeActive(mozilla::wr::DisplayListBuilder& aBuilder,

                      mozilla::wr::IpcResourceUpdateQueue& aResources,

                      const mozilla::layers::StackingContextHelper& aSc,

                      mozilla::layers::RenderRootStateManager* aManager,

                      nsDisplayListBuilder* aDisplayListBuilder) {

    auto* frame = static_cast<SVGImageFrame*>(mFrame);

    return frame->CreateWebRenderCommands(aBuilder, aResources, aSc, aManager,

                                          aDisplayListBuilder, this,

                                          /*aDryRun=*/true);

  bool CreateWebRenderCommands(

      mozilla::wr::DisplayListBuilder& aBuilder,

      mozilla::wr::IpcResourceUpdateQueue& aResources,

      const mozilla::layers::StackingContextHelper& aSc,

      mozilla::layers::RenderRootStateManager* aManager,

      nsDisplayListBuilder* aDisplayListBuilder) override {

    auto* frame = static_cast<SVGImageFrame*>(mFrame);

    bool result = frame->CreateWebRenderCommands(aBuilder, aResources, aSc,

                                                 aManager, aDisplayListBuilder,

                                                 this, /*aDryRun=*/false);

    MOZ_ASSERT(result, "ShouldBeActive inconsistent with CreateWRCommands?");

    return result;

  bool IsInvisible() const override {

    auto* frame = static_cast<SVGImageFrame*>(mFrame);

    return frame->IsInvisible();

};

}  // namespace mozilla

#endif  // LAYOUT_SVG_SVGIMAGEFRAME_H_