tor-browser

The Tor Browser
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SVGTransformableElement.cpp (2707B)

      1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
      3 /* This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this
      5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 #include "SVGTransformableElement.h"
      8 
      9 #include "DOMSVGAnimatedTransformList.h"
     10 #include "nsContentUtils.h"
     11 #include "nsIFrame.h"
     12 
     13 using namespace mozilla::gfx;
     14 
     15 namespace mozilla::dom {
     16 
     17 already_AddRefed<DOMSVGAnimatedTransformList>
     18 SVGTransformableElement::Transform() {
     19  // We're creating a DOM wrapper, so we must tell GetAnimatedTransformList
     20  // to allocate the DOMSVGAnimatedTransformList if it hasn't already done so:
     21  return DOMSVGAnimatedTransformList::GetDOMWrapper(
     22      GetAnimatedTransformList(DO_ALLOCATE), this);
     23 }
     24 
     25 //----------------------------------------------------------------------
     26 // nsIContent methods
     27 
     28 bool SVGTransformableElement::IsAttributeMapped(
     29    const nsAtom* aAttribute) const {
     30  return aAttribute == nsGkAtoms::transform ||
     31         SVGElement::IsAttributeMapped(aAttribute);
     32 }
     33 
     34 bool SVGTransformableElement::IsEventAttributeNameInternal(nsAtom* aName) {
     35  return nsContentUtils::IsEventAttributeName(aName, EventNameType_SVGGraphic);
     36 }
     37 
     38 //----------------------------------------------------------------------
     39 // SVGElement overrides
     40 
     41 const gfx::Matrix* SVGTransformableElement::GetAnimateMotionTransform() const {
     42  return mAnimateMotionTransform.get();
     43 }
     44 
     45 void SVGTransformableElement::SetAnimateMotionTransform(
     46    const gfx::Matrix* aMatrix) {
     47  if ((!aMatrix && !mAnimateMotionTransform) ||
     48      (aMatrix && mAnimateMotionTransform &&
     49       aMatrix->FuzzyEquals(*mAnimateMotionTransform))) {
     50    return;
     51  }
     52  mAnimateMotionTransform =
     53      aMatrix ? MakeUnique<gfx::Matrix>(*aMatrix) : nullptr;
     54  DidAnimateTransformList();
     55  nsIFrame* frame = GetPrimaryFrame();
     56  if (frame) {
     57    // If the result of this transform and any other transforms on this frame
     58    // is the identity matrix, then DoApplyRenderingChangeToTree won't handle
     59    // our nsChangeHint_UpdateTransformLayer hint since aFrame->IsTransformed()
     60    // will return false. That's fine, but we still need to schedule a repaint,
     61    // and that won't otherwise happen. Since it's cheap to call SchedulePaint,
     62    // we don't bother to check IsTransformed().
     63    frame->SchedulePaint();
     64  }
     65 }
     66 
     67 SVGAnimatedTransformList* SVGTransformableElement::GetAnimatedTransformList(
     68    uint32_t aFlags) {
     69  if (!mTransforms && (aFlags & DO_ALLOCATE)) {
     70    mTransforms = MakeUnique<SVGAnimatedTransformList>();
     71  }
     72  return mTransforms.get();
     73 }
     74 
     75 }  // namespace mozilla::dom