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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */
#include "gfx2DGlue.h"
#include "mozilla/dom/SVGAnimatedTransformList.h"
#include "mozilla/dom/SVGGraphicsElementBinding.h"
#include "mozilla/dom/SVGTransformableElement.h"
#include "mozilla/dom/SVGMatrix.h"
#include "mozilla/dom/SVGSVGElement.h"
#include "nsContentUtils.h"
#include "nsIDOMMutationEvent.h"
#include "nsIFrame.h"
#include "nsISVGChildFrame.h"
#include "mozilla/dom/SVGRect.h"
#include "nsSVGUtils.h"
#include "SVGContentUtils.h"
using namespace mozilla::gfx;
namespace mozilla {
namespace dom {
already_AddRefed<SVGAnimatedTransformList>
SVGTransformableElement::Transform()
{
// We're creating a DOM wrapper, so we must tell GetAnimatedTransformList
// to allocate the SVGAnimatedTransformList if it hasn't already done so:
return SVGAnimatedTransformList::GetDOMWrapper(
GetAnimatedTransformList(DO_ALLOCATE), this);
}
//----------------------------------------------------------------------
// nsIContent methods
NS_IMETHODIMP_(bool)
SVGTransformableElement::IsAttributeMapped(const nsIAtom* name) const
{
static const MappedAttributeEntry* const map[] = {
sColorMap,
sFillStrokeMap,
sGraphicsMap
};
return FindAttributeDependence(name, map) ||
nsSVGElement::IsAttributeMapped(name);
}
nsChangeHint
SVGTransformableElement::GetAttributeChangeHint(const nsIAtom* aAttribute,
int32_t aModType) const
{
nsChangeHint retval =
nsSVGElement::GetAttributeChangeHint(aAttribute, aModType);
if (aAttribute == nsGkAtoms::transform ||
aAttribute == nsGkAtoms::mozAnimateMotionDummyAttr) {
nsIFrame* frame =
const_cast<SVGTransformableElement*>(this)->GetPrimaryFrame();
retval |= nsChangeHint_InvalidateRenderingObservers;
if (!frame || (frame->GetStateBits() & NS_FRAME_IS_NONDISPLAY)) {
return retval;
}
bool isAdditionOrRemoval = false;
if (aModType == nsIDOMMutationEvent::ADDITION ||
aModType == nsIDOMMutationEvent::REMOVAL) {
isAdditionOrRemoval = true;
} else {
MOZ_ASSERT(aModType == nsIDOMMutationEvent::MODIFICATION,
"Unknown modification type.");
if (!mTransforms ||
!mTransforms->HasTransform() ||
!mTransforms->HadTransformBeforeLastBaseValChange()) {
// New or old value is empty; this is effectively addition or removal.
isAdditionOrRemoval = true;
}
}
if (isAdditionOrRemoval) {
// Reconstruct the frame tree to handle stacking context changes:
retval |= nsChangeHint_ReconstructFrame;
} else {
// We just assume the old and new transforms are different.
retval |= nsChangeHint_UpdatePostTransformOverflow |
nsChangeHint_UpdateTransformLayer;
}
}
return retval;
}
bool
SVGTransformableElement::IsEventAttributeName(nsIAtom* aName)
{
return nsContentUtils::IsEventAttributeName(aName, EventNameType_SVGGraphic);
}
//----------------------------------------------------------------------
// nsSVGElement overrides
gfxMatrix
SVGTransformableElement::PrependLocalTransformsTo(
const gfxMatrix &aMatrix,
SVGTransformTypes aWhich) const
{
return SVGContentUtils::PrependLocalTransformsTo(
aMatrix, aWhich, mAnimateMotionTransform, mTransforms);
}
const gfx::Matrix*
SVGTransformableElement::GetAnimateMotionTransform() const
{
return mAnimateMotionTransform.get();
}
void
SVGTransformableElement::SetAnimateMotionTransform(const gfx::Matrix* aMatrix)
{
if ((!aMatrix && !mAnimateMotionTransform) ||
(aMatrix && mAnimateMotionTransform && *aMatrix == *mAnimateMotionTransform)) {
return;
}
bool transformSet = mTransforms && mTransforms->IsExplicitlySet();
bool prevSet = mAnimateMotionTransform || transformSet;
mAnimateMotionTransform = aMatrix ? new gfx::Matrix(*aMatrix) : nullptr;
bool nowSet = mAnimateMotionTransform || transformSet;
int32_t modType;
if (prevSet && !nowSet) {
modType = nsIDOMMutationEvent::REMOVAL;
} else if(!prevSet && nowSet) {
modType = nsIDOMMutationEvent::ADDITION;
} else {
modType = nsIDOMMutationEvent::MODIFICATION;
}
DidAnimateTransformList(modType);
nsIFrame* frame = GetPrimaryFrame();
if (frame) {
// If the result of this transform and any other transforms on this frame
// is the identity matrix, then DoApplyRenderingChangeToTree won't handle
// our nsChangeHint_UpdateTransformLayer hint since aFrame->IsTransformed()
// will return false. That's fine, but we still need to schedule a repaint,
// and that won't otherwise happen. Since it's cheap to call SchedulePaint,
// we don't bother to check IsTransformed().
frame->SchedulePaint();
}
}
nsSVGAnimatedTransformList*
SVGTransformableElement::GetAnimatedTransformList(uint32_t aFlags)
{
if (!mTransforms && (aFlags & DO_ALLOCATE)) {
mTransforms = new nsSVGAnimatedTransformList();
}
return mTransforms;
}
nsSVGElement*
SVGTransformableElement::GetNearestViewportElement()
{
return SVGContentUtils::GetNearestViewportElement(this);
}
nsSVGElement*
SVGTransformableElement::GetFarthestViewportElement()
{
return SVGContentUtils::GetOuterSVGElement(this);
}
already_AddRefed<SVGIRect>
SVGTransformableElement::GetBBox(const SVGBoundingBoxOptions& aOptions,
ErrorResult& rv)
{
nsIFrame* frame = GetPrimaryFrame(Flush_Layout);
if (!frame || (frame->GetStateBits() & NS_FRAME_IS_NONDISPLAY)) {
rv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
nsISVGChildFrame* svgframe = do_QueryFrame(frame);
if (!svgframe) {
rv.Throw(NS_ERROR_NOT_IMPLEMENTED); // XXX: outer svg
return nullptr;
}
if (!NS_SVGNewGetBBoxEnabled()) {
return NS_NewSVGRect(this, ToRect(nsSVGUtils::GetBBox(frame)));
} else {
uint32_t flags = 0;
if (aOptions.mFill) {
flags |= nsSVGUtils::eBBoxIncludeFill;
}
if (aOptions.mStroke) {
flags |= nsSVGUtils::eBBoxIncludeStroke;
}
if (aOptions.mMarkers) {
flags |= nsSVGUtils::eBBoxIncludeMarkers;
}
if (aOptions.mClipped) {
flags |= nsSVGUtils::eBBoxIncludeClipped;
}
if (flags == 0) {
return NS_NewSVGRect(this,0,0,0,0);
}
if (flags == nsSVGUtils::eBBoxIncludeMarkers ||
flags == nsSVGUtils::eBBoxIncludeClipped) {
flags |= nsSVGUtils::eBBoxIncludeFill;
}
return NS_NewSVGRect(this, ToRect(nsSVGUtils::GetBBox(frame, flags)));
}
}
already_AddRefed<SVGMatrix>
SVGTransformableElement::GetCTM()
{
nsIDocument* currentDoc = GetComposedDoc();
if (currentDoc) {
// Flush all pending notifications so that our frames are up to date
currentDoc->FlushPendingNotifications(Flush_Layout);
}
gfx::Matrix m = SVGContentUtils::GetCTM(this, false);
RefPtr<SVGMatrix> mat = m.IsSingular() ? nullptr : new SVGMatrix(ThebesMatrix(m));
return mat.forget();
}
already_AddRefed<SVGMatrix>
SVGTransformableElement::GetScreenCTM()
{
nsIDocument* currentDoc = GetComposedDoc();
if (currentDoc) {
// Flush all pending notifications so that our frames are up to date
currentDoc->FlushPendingNotifications(Flush_Layout);
}
gfx::Matrix m = SVGContentUtils::GetCTM(this, true);
RefPtr<SVGMatrix> mat = m.IsSingular() ? nullptr : new SVGMatrix(ThebesMatrix(m));
return mat.forget();
}
already_AddRefed<SVGMatrix>
SVGTransformableElement::GetTransformToElement(SVGGraphicsElement& aElement,
ErrorResult& rv)
{
// the easiest way to do this (if likely to increase rounding error):
RefPtr<SVGMatrix> ourScreenCTM = GetScreenCTM();
RefPtr<SVGMatrix> targetScreenCTM = aElement.GetScreenCTM();
if (!ourScreenCTM || !targetScreenCTM) {
rv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return nullptr;
}
RefPtr<SVGMatrix> tmp = targetScreenCTM->Inverse(rv);
if (rv.Failed()) return nullptr;
RefPtr<SVGMatrix> mat = tmp->Multiply(*ourScreenCTM);
return mat.forget();
}
} // namespace dom
} // namespace mozilla
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