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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/. */
#include "SVGTransformableElement.h"
#include "DOMSVGAnimatedTransformList.h"
#include "gfx2DGlue.h"
#include "mozilla/dom/MutationEventBinding.h"
#include "mozilla/dom/SVGGraphicsElementBinding.h"
#include "mozilla/dom/SVGMatrix.h"
#include "mozilla/dom/SVGRect.h"
#include "mozilla/dom/SVGSVGElement.h"
#include "mozilla/ISVGDisplayableFrame.h"
#include "mozilla/SVGContentUtils.h"
#include "mozilla/SVGTextFrame.h"
#include "mozilla/SVGUtils.h"
#include "nsContentUtils.h"
#include "nsIFrame.h"
using namespace mozilla::gfx;
namespace mozilla {
namespace dom {
already_AddRefed<DOMSVGAnimatedTransformList>
SVGTransformableElement::Transform() {
// We're creating a DOM wrapper, so we must tell GetAnimatedTransformList
// to allocate the DOMSVGAnimatedTransformList if it hasn't already done so:
return DOMSVGAnimatedTransformList::GetDOMWrapper(
GetAnimatedTransformList(DO_ALLOCATE), this);
}
//----------------------------------------------------------------------
// nsIContent methods
NS_IMETHODIMP_(bool)
SVGTransformableElement::IsAttributeMapped(const nsAtom* name) const {
static const MappedAttributeEntry* const map[] = {sColorMap, sFillStrokeMap,
sGraphicsMap};
return FindAttributeDependence(name, map) ||
SVGElement::IsAttributeMapped(name);
}
nsChangeHint SVGTransformableElement::GetAttributeChangeHint(
const nsAtom* aAttribute, int32_t aModType) const {
nsChangeHint retval =
SVGElement::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 == MutationEvent_Binding::ADDITION ||
aModType == MutationEvent_Binding::REMOVAL) {
isAdditionOrRemoval = true;
} else {
MOZ_ASSERT(aModType == MutationEvent_Binding::MODIFICATION,
"Unknown modification type.");
if (!mTransforms || !mTransforms->HasTransform()) {
// New value is empty, treat as removal.
// FIXME: Should we just rely on CreatedOrRemovedOnLastChange?
isAdditionOrRemoval = true;
} else if (mTransforms->CreatedOrRemovedOnLastChange()) {
// Old value was empty, treat as addition.
isAdditionOrRemoval = true;
}
}
if (isAdditionOrRemoval) {
retval |= nsChangeHint_ComprehensiveAddOrRemoveTransform;
} else {
// We just assume the old and new transforms are different.
retval |= nsChangeHint_UpdatePostTransformOverflow |
nsChangeHint_UpdateTransformLayer;
}
}
return retval;
}
bool SVGTransformableElement::IsEventAttributeNameInternal(nsAtom* aName) {
return nsContentUtils::IsEventAttributeName(aName, EventNameType_SVGGraphic);
}
//----------------------------------------------------------------------
// SVGElement overrides
gfxMatrix SVGTransformableElement::PrependLocalTransformsTo(
const gfxMatrix& aMatrix, SVGTransformTypes aWhich) const {
if (aWhich == eChildToUserSpace) {
// We don't have any eUserSpaceToParent transforms. (Sub-classes that do
// must override this function and handle that themselves.)
return aMatrix;
}
return GetUserToParentTransform(mAnimateMotionTransform.get(),
mTransforms.get()) *
aMatrix;
}
const gfx::Matrix* SVGTransformableElement::GetAnimateMotionTransform() const {
return mAnimateMotionTransform.get();
}
void SVGTransformableElement::SetAnimateMotionTransform(
const gfx::Matrix* aMatrix) {
if ((!aMatrix && !mAnimateMotionTransform) ||
(aMatrix && mAnimateMotionTransform &&
aMatrix->FuzzyEquals(*mAnimateMotionTransform))) {
return;
}
bool transformSet = mTransforms && mTransforms->IsExplicitlySet();
bool prevSet = mAnimateMotionTransform || transformSet;
mAnimateMotionTransform =
aMatrix ? MakeUnique<gfx::Matrix>(*aMatrix) : nullptr;
bool nowSet = mAnimateMotionTransform || transformSet;
int32_t modType;
if (prevSet && !nowSet) {
modType = MutationEvent_Binding::REMOVAL;
} else if (!prevSet && nowSet) {
modType = MutationEvent_Binding::ADDITION;
} else {
modType = MutationEvent_Binding::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();
}
}
SVGAnimatedTransformList* SVGTransformableElement::GetAnimatedTransformList(
uint32_t aFlags) {
if (!mTransforms && (aFlags & DO_ALLOCATE)) {
mTransforms = MakeUnique<SVGAnimatedTransformList>();
}
return mTransforms.get();
}
SVGElement* SVGTransformableElement::GetNearestViewportElement() {
return SVGContentUtils::GetNearestViewportElement(this);
}
SVGElement* SVGTransformableElement::GetFarthestViewportElement() {
return SVGContentUtils::GetOuterSVGElement(this);
}
static already_AddRefed<SVGRect> ZeroBBox(SVGTransformableElement& aOwner) {
return MakeAndAddRef<SVGRect>(&aOwner, Rect{0, 0, 0, 0});
}
already_AddRefed<SVGRect> SVGTransformableElement::GetBBox(
const SVGBoundingBoxOptions& aOptions) {
nsIFrame* frame = GetPrimaryFrame(FlushType::Layout);
if (!frame || (frame->GetStateBits() & NS_FRAME_IS_NONDISPLAY)) {
return ZeroBBox(*this);
}
ISVGDisplayableFrame* svgframe = do_QueryFrame(frame);
if (!svgframe) {
if (!SVGUtils::IsInSVGTextSubtree(frame)) {
return ZeroBBox(*this);
}
// For <tspan>, <textPath>, the frame is an nsInlineFrame or
// nsBlockFrame, |svgframe| will be a nullptr.
// We implement their getBBox directly here instead of in
// SVGUtils::GetBBox, because SVGUtils::GetBBox is more
// or less used for other purpose elsewhere. e.g. gradient
// code assumes GetBBox of <tspan> returns the bbox of the
// outer <text>.
// TODO: cleanup this sort of usecase of SVGUtils::GetBBox,
// then move this code SVGUtils::GetBBox.
SVGTextFrame* text =
static_cast<SVGTextFrame*>(nsLayoutUtils::GetClosestFrameOfType(
frame->GetParent(), LayoutFrameType::SVGText));
if (text->HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)) {
return ZeroBBox(*this);
}
gfxRect rec = text->TransformFrameRectFromTextChild(
frame->GetRectRelativeToSelf(), frame);
// Should also add the |x|, |y| of the SVGTextFrame itself, since
// the result obtained by TransformFrameRectFromTextChild doesn't
// include them.
rec.x += float(text->GetPosition().x) / AppUnitsPerCSSPixel();
rec.y += float(text->GetPosition().y) / AppUnitsPerCSSPixel();
return do_AddRef(new SVGRect(this, ToRect(rec)));
}
if (!NS_SVGNewGetBBoxEnabled()) {
return do_AddRef(new SVGRect(
this, ToRect(SVGUtils::GetBBox(
frame, SVGUtils::eBBoxIncludeFillGeometry |
SVGUtils::eUseUserSpaceOfUseElement))));
}
uint32_t flags = 0;
if (aOptions.mFill) {
flags |= SVGUtils::eBBoxIncludeFill;
}
if (aOptions.mStroke) {
flags |= SVGUtils::eBBoxIncludeStroke;
}
if (aOptions.mMarkers) {
flags |= SVGUtils::eBBoxIncludeMarkers;
}
if (aOptions.mClipped) {
flags |= SVGUtils::eBBoxIncludeClipped;
}
if (flags == 0) {
return do_AddRef(new SVGRect(this, gfx::Rect()));
}
if (flags == SVGUtils::eBBoxIncludeMarkers ||
flags == SVGUtils::eBBoxIncludeClipped) {
flags |= SVGUtils::eBBoxIncludeFill;
}
flags |= SVGUtils::eUseUserSpaceOfUseElement;
return do_AddRef(new SVGRect(this, ToRect(SVGUtils::GetBBox(frame, flags))));
}
already_AddRefed<SVGMatrix> SVGTransformableElement::GetCTM() {
Document* currentDoc = GetComposedDoc();
if (currentDoc) {
// Flush all pending notifications so that our frames are up to date
currentDoc->FlushPendingNotifications(FlushType::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() {
Document* currentDoc = GetComposedDoc();
if (currentDoc) {
// Flush all pending notifications so that our frames are up to date
currentDoc->FlushPendingNotifications(FlushType::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();
}
/* static */
gfxMatrix SVGTransformableElement::GetUserToParentTransform(
const gfx::Matrix* aAnimateMotionTransform,
const SVGAnimatedTransformList* aTransforms) {
gfxMatrix result;
if (aAnimateMotionTransform) {
result.PreMultiply(ThebesMatrix(*aAnimateMotionTransform));
}
if (aTransforms) {
result.PreMultiply(aTransforms->GetAnimValue().GetConsolidationMatrix());
}
return result;
}
} // namespace dom
} // namespace mozilla