Ziele Untersuchung
mit Columbo Integrität von
Datenbanken Interaktion und
Portierbarkeit Ergonomie der
Schnittstellen

Angebot Produkte Projekt Beratung

Mittel Analytik Modellierung Sprachen Algebra Logik Hardware Denken Kreativität

Zusammenhänge Gesellschaft Wirtschaft Branche Firma


products/sources/formale Sprachen/C/Firefox/layout/svg/ (Browser von der Mozilla Stiftung Version 136.0.1^©) Datei vom 10.2.2025 mit Größe 8 kB

Quelle SVGSwitchFrame.cpp Sprache: C

/* -*- 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/. */

// Keep in (case-insensitive) order:
#include "gfxRect.h"
#include "SVGGFrame.h"
#include "mozilla/PresShell.h"
#include "mozilla/SVGContainerFrame.h"
#include "mozilla/SVGObserverUtils.h"
#include "mozilla/SVGTextFrame.h"
#include "mozilla/SVGUtils.h"
#include "mozilla/dom/SVGSwitchElement.h"

using namespace mozilla::dom;
using namespace mozilla::gfx;
using namespace mozilla::image;

nsIFrame* NS_NewSVGSwitchFrame(mozilla::PresShell* aPresShell,
                               mozilla::ComputedStyle* aStyle);

namespace mozilla {

class SVGSwitchFrame final : public SVGGFrame {
  friend nsIFrame* ::NS_NewSVGSwitchFrame(mozilla::PresShell* aPresShell,
                                          ComputedStyle* aStyle);

protected:
  explicit SVGSwitchFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)
      : SVGGFrame(aStyle, aPresContext, kClassID) {}

public:
  NS_DECL_FRAMEARENA_HELPERS(SVGSwitchFrame)

#ifdef DEBUG
  void Init(nsIContent* aContent, nsContainerFrame* aParent,
            nsIFrame* aPrevInFlow) override;
#endif

#ifdef DEBUG_FRAME_DUMP
  nsresult GetFrameName(nsAString& aResult) const override {
    return MakeFrameName(u"SVGSwitch"_ns, aResult);
  }
#endif

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

  // ISVGDisplayableFrame interface:
  void PaintSVG(gfxContext& aContext, const gfxMatrix& aTransform,
                imgDrawingParams& aImgParams) override;
  nsIFrame* GetFrameForPoint(const gfxPoint& aPoint) override;
  void ReflowSVG() override;
  SVGBBox GetBBoxContribution(const Matrix& aToBBoxUserspace,
                              uint32_t aFlags) override;

private:
  nsIFrame* GetActiveChildFrame();
  void ReflowAllSVGTextFramesInsideNonActiveChildren(nsIFrame* aActiveChild);
  static void AlwaysReflowSVGTextFrameDoForOneKid(nsIFrame* aKid);
};

}  // namespace mozilla

//----------------------------------------------------------------------
// Implementation

nsIFrame* NS_NewSVGSwitchFrame(mozilla::PresShell* aPresShell,
                               mozilla::ComputedStyle* aStyle) {
  return new (aPresShell)
      mozilla::SVGSwitchFrame(aStyle, aPresShell->GetPresContext());
}

namespace mozilla {

NS_IMPL_FRAMEARENA_HELPERS(SVGSwitchFrame)

#ifdef DEBUG
void SVGSwitchFrame::Init(nsIContent* aContent, nsContainerFrame* aParent,
                          nsIFrame* aPrevInFlow) {
  NS_ASSERTION(aContent->IsSVGElement(nsGkAtoms::svgSwitch),
               "Content is not an SVG switch");

  SVGGFrame::Init(aContent, aParent, aPrevInFlow);
}
#endif /* DEBUG */

void SVGSwitchFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
                                      const nsDisplayListSet& aLists) {
  if (auto* kid = GetActiveChildFrame()) {
    BuildDisplayListForChild(aBuilder, kid, aLists);
  }
}

void SVGSwitchFrame::PaintSVG(gfxContext& aContext, const gfxMatrix& aTransform,
                              imgDrawingParams& aImgParams) {
  NS_ASSERTION(HasAnyStateBits(NS_FRAME_IS_NONDISPLAY),
               "Only painting of non-display SVG should take this code path");

  if (StyleEffects()->IsTransparent()) {
    return;
  }

  if (auto* kid = GetActiveChildFrame()) {
    gfxMatrix tm = aTransform;
    if (kid->GetContent()->IsSVGElement()) {
      tm = SVGUtils::GetTransformMatrixInUserSpace(kid) * tm;
    }
    SVGUtils::PaintFrameWithEffects(kid, aContext, tm, aImgParams);
  }
}

nsIFrame* SVGSwitchFrame::GetFrameForPoint(const gfxPoint& aPoint) {
  MOZ_ASSERT_UNREACHABLE("A clipPath cannot contain an SVGSwitch element");
  return nullptr;
}

static bool ShouldReflowSVGTextFrameInside(const nsIFrame* aFrame) {
  return aFrame->IsSVGContainerFrame() || aFrame->IsSVGForeignObjectFrame() ||
         !aFrame->IsSVGFrame();
}

void SVGSwitchFrame::AlwaysReflowSVGTextFrameDoForOneKid(nsIFrame* aKid) {
  if (!aKid->IsSubtreeDirty()) {
    return;
  }

  if (aKid->IsSVGTextFrame()) {
    MOZ_ASSERT(!aKid->HasAnyStateBits(NS_FRAME_IS_NONDISPLAY),
               "A non-display SVGTextFrame directly contained in a display "
               "container?");
    static_cast<SVGTextFrame*>(aKid)->ReflowSVG();
  } else if (ShouldReflowSVGTextFrameInside(aKid)) {
    if (!aKid->HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)) {
      for (nsIFrame* kid : aKid->PrincipalChildList()) {
        AlwaysReflowSVGTextFrameDoForOneKid(kid);
      }
    } else {
      // This child is in a nondisplay context, something like:
      // <switch>
      //   ...
      //   <g><mask><text></text></mask></g>
      // </switch>
      // We should not call ReflowSVG on it.
      SVGContainerFrame::ReflowSVGNonDisplayText(aKid);
    }
  }
}

void SVGSwitchFrame::ReflowAllSVGTextFramesInsideNonActiveChildren(
    nsIFrame* aActiveChild) {
  for (auto* kid : mFrames) {
    if (aActiveChild == kid) {
      continue;
    }

    AlwaysReflowSVGTextFrameDoForOneKid(kid);
  }
}

void SVGSwitchFrame::ReflowSVG() {
  NS_ASSERTION(SVGUtils::OuterSVGIsCallingReflowSVG(this),
               "This call is probably a wasteful mistake");

  MOZ_ASSERT(!HasAnyStateBits(NS_FRAME_IS_NONDISPLAY),
             "ReflowSVG mechanism not designed for this");

  if (!SVGUtils::NeedsReflowSVG(this)) {
    return;
  }

  // If the NS_FRAME_FIRST_REFLOW bit has been removed from our parent frame,
  // then our outer-<svg> has previously had its initial reflow. In that case
  // we need to make sure that that bit has been removed from ourself _before_
  // recursing over our children to ensure that they know too. Otherwise, we
  // need to remove it _after_ recursing over our children so that they know
  // the initial reflow is currently underway.

  bool isFirstReflow = HasAnyStateBits(NS_FRAME_FIRST_REFLOW);

  bool outerSVGHasHadFirstReflow =
      !GetParent()->HasAnyStateBits(NS_FRAME_FIRST_REFLOW);

  if (outerSVGHasHadFirstReflow) {
    RemoveStateBits(NS_FRAME_FIRST_REFLOW);  // tell our children
  }

  OverflowAreas overflowRects;

  auto* child = GetActiveChildFrame();
  ReflowAllSVGTextFramesInsideNonActiveChildren(child);

  ISVGDisplayableFrame* svgChild = do_QueryFrame(child);
  if (svgChild && !child->HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)) {
    svgChild->ReflowSVG();

    // We build up our child frame overflows here instead of using
    // nsLayoutUtils::UnionChildOverflow since SVG frame's all use the same
    // frame list, and we're iterating over that list now anyway.
    ConsiderChildOverflow(overflowRects, child);
  } else if (child && ShouldReflowSVGTextFrameInside(child)) {
    MOZ_ASSERT(
        child->HasAnyStateBits(NS_FRAME_IS_NONDISPLAY) || !child->IsSVGFrame(),
        "Check for this explicitly in the |if|, then");
    ReflowSVGNonDisplayText(child);
  }

  if (isFirstReflow) {
    // Make sure we have our filter property (if any) before calling
    // FinishAndStoreOverflow (subsequent filter changes are handled off
    // nsChangeHint_UpdateEffects):
    SVGObserverUtils::UpdateEffects(this);
  }

  FinishAndStoreOverflow(overflowRects, mRect.Size());

  // Remove state bits after FinishAndStoreOverflow so that it doesn't
  // invalidate on first reflow:
  RemoveStateBits(NS_FRAME_FIRST_REFLOW | NS_FRAME_IS_DIRTY |
                  NS_FRAME_HAS_DIRTY_CHILDREN);
}

SVGBBox SVGSwitchFrame::GetBBoxContribution(const Matrix& aToBBoxUserspace,
                                            uint32_t aFlags) {
  auto* kid = GetActiveChildFrame();
  if (ISVGDisplayableFrame* svgKid = do_QueryFrame(kid)) {
    nsIContent* content = kid->GetContent();
    gfxMatrix transform = ThebesMatrix(aToBBoxUserspace);
    if (content->IsSVGElement()) {
      transform =
          static_cast<SVGElement*>(content)->ChildToUserSpaceTransform() *
          SVGUtils::GetTransformMatrixInUserSpace(kid) * transform;
    }
    return svgKid->GetBBoxContribution(ToMatrix(transform), aFlags);
  }
  return SVGBBox();
}

nsIFrame* SVGSwitchFrame::GetActiveChildFrame() {
  auto* activeChild =
      static_cast<dom::SVGSwitchElement*>(GetContent())->GetActiveChild();
  return activeChild ? activeChild->GetPrimaryFrame() : nullptr;
}

}  // namespace mozilla

quality96%

¤ Dauer der Verarbeitung: 0.11 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.