The Tor Browser: layout/svg/nsSVGGFrame.cpp@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 // Main header first:

     7 #include "nsSVGGFrame.h"

     9 // Keep others in (case-insensitive) order:

    10 #include "nsGkAtoms.h"

    11 #include "SVGTransformableElement.h"

    12 #include "nsIFrame.h"

    13 #include "SVGGraphicsElement.h"

    14 #include "nsSVGIntegrationUtils.h"

    15 #include "nsSVGUtils.h"

    17 using namespace mozilla::dom;

    19 //----------------------------------------------------------------------

    20 // Implementation

    22 nsIFrame*

    23 NS_NewSVGGFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)

    24 {

    25   return new (aPresShell) nsSVGGFrame(aContext);

    26 }

    28 NS_IMPL_FRAMEARENA_HELPERS(nsSVGGFrame)

    30 #ifdef DEBUG

    31 void

    32 nsSVGGFrame::Init(nsIContent* aContent,

    33                   nsIFrame* aParent,

    34                   nsIFrame* aPrevInFlow)

    35 {

    36   NS_ASSERTION(aContent->IsSVG() &&

    37                static_cast<nsSVGElement*>(aContent)->IsTransformable(),

    38                "The element doesn't support nsIDOMSVGTransformable");

    40   nsSVGGFrameBase::Init(aContent, aParent, aPrevInFlow);

    41 }

    42 #endif /* DEBUG */

    44 nsIAtom *

    45 nsSVGGFrame::GetType() const

    46 {

    47   return nsGkAtoms::svgGFrame;

    48 }

    50 //----------------------------------------------------------------------

    51 // nsISVGChildFrame methods

    53 void

    54 nsSVGGFrame::NotifySVGChanged(uint32_t aFlags)

    55 {

    56   NS_ABORT_IF_FALSE(aFlags & (TRANSFORM_CHANGED | COORD_CONTEXT_CHANGED),

    57                     "Invalidation logic may need adjusting");

    59   if (aFlags & TRANSFORM_CHANGED) {

    60     // make sure our cached transform matrix gets (lazily) updated

    61     mCanvasTM = nullptr;

    62   }

    64   nsSVGGFrameBase::NotifySVGChanged(aFlags);

    65 }

    67 gfxMatrix

    68 nsSVGGFrame::GetCanvasTM(uint32_t aFor, nsIFrame* aTransformRoot)

    69 {

    70   if (!(GetStateBits() & NS_FRAME_IS_NONDISPLAY) && !aTransformRoot) {

    71     if ((aFor == FOR_PAINTING && NS_SVGDisplayListPaintingEnabled()) ||

    72         (aFor == FOR_HIT_TESTING && NS_SVGDisplayListHitTestingEnabled())) {

    73       return nsSVGIntegrationUtils::GetCSSPxToDevPxMatrix(this);

    74     }

    75   }

    76   if (!mCanvasTM) {

    77     NS_ASSERTION(mParent, "null parent");

    79     nsSVGContainerFrame *parent = static_cast<nsSVGContainerFrame*>(mParent);

    80     SVGGraphicsElement *content = static_cast<SVGGraphicsElement*>(mContent);

    81     gfxMatrix tm = content->PrependLocalTransformsTo(

    82         this == aTransformRoot ? gfxMatrix() :

    83                                  parent->GetCanvasTM(aFor, aTransformRoot));

    85     mCanvasTM = new gfxMatrix(tm);

    86   }

    87   return *mCanvasTM;

    88 }

    90 nsresult

    91 nsSVGGFrame::AttributeChanged(int32_t         aNameSpaceID,

    92                               nsIAtom*        aAttribute,

    93                               int32_t         aModType)

    94 {

    95   if (aNameSpaceID == kNameSpaceID_None &&

    96       aAttribute == nsGkAtoms::transform) {

    97     // We don't invalidate for transform changes (the layers code does that).

    98     // Also note that SVGTransformableElement::GetAttributeChangeHint will

    99     // return nsChangeHint_UpdateOverflow for "transform" attribute changes

   100     // and cause DoApplyRenderingChangeToTree to make the SchedulePaint call.

   101     NotifySVGChanged(TRANSFORM_CHANGED);

   102   }

   104   return NS_OK;

   105 }

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