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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 "DOMSVGPoint.h"
#include "DOMSVGPointList.h"
#include "SVGPoint.h"
#include "gfx2DGlue.h"
#include "nsSVGElement.h"
#include "nsError.h"
#include "mozilla/dom/SVGMatrix.h"
// See the architecture comment in DOMSVGPointList.h.
using namespace mozilla;
using namespace mozilla::gfx;
namespace mozilla {
//----------------------------------------------------------------------
// Helper class: AutoChangePointNotifier
// Stack-based helper class to pair calls to WillChangePointList and
// DidChangePointList.
class MOZ_RAII AutoChangePointNotifier
{
public:
explicit AutoChangePointNotifier(DOMSVGPoint* aPoint MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
: mPoint(aPoint)
{
MOZ_GUARD_OBJECT_NOTIFIER_INIT;
MOZ_ASSERT(mPoint, "Expecting non-null point");
MOZ_ASSERT(mPoint->HasOwner(),
"Expecting list to have an owner for notification");
mEmptyOrOldValue =
mPoint->Element()->WillChangePointList();
}
~AutoChangePointNotifier()
{
mPoint->Element()->DidChangePointList(mEmptyOrOldValue);
if (mPoint->mList->AttrIsAnimating()) {
mPoint->Element()->AnimationNeedsResample();
}
}
private:
DOMSVGPoint* const mPoint;
nsAttrValue mEmptyOrOldValue;
MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
};
} // namespace mozilla
float
DOMSVGPoint::X()
{
if (mIsAnimValItem && HasOwner()) {
Element()->FlushAnimations(); // May make HasOwner() == false
}
return HasOwner() ? InternalItem().mX : mPt.mX;
}
void
DOMSVGPoint::SetX(float aX, ErrorResult& rv)
{
if (mIsAnimValItem || mIsReadonly) {
rv.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
return;
}
if (HasOwner()) {
if (InternalItem().mX == aX) {
return;
}
AutoChangePointNotifier notifier(this);
InternalItem().mX = aX;
return;
}
mPt.mX = aX;
}
float
DOMSVGPoint::Y()
{
if (mIsAnimValItem && HasOwner()) {
Element()->FlushAnimations(); // May make HasOwner() == false
}
return HasOwner() ? InternalItem().mY : mPt.mY;
}
void
DOMSVGPoint::SetY(float aY, ErrorResult& rv)
{
if (mIsAnimValItem || mIsReadonly) {
rv.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
return;
}
if (HasOwner()) {
if (InternalItem().mY == aY) {
return;
}
AutoChangePointNotifier notifier(this);
InternalItem().mY = aY;
return;
}
mPt.mY = aY;
}
already_AddRefed<nsISVGPoint>
DOMSVGPoint::MatrixTransform(dom::SVGMatrix& matrix)
{
float x = HasOwner() ? InternalItem().mX : mPt.mX;
float y = HasOwner() ? InternalItem().mY : mPt.mY;
Point pt = ToMatrix(matrix.GetMatrix()).TransformPoint(Point(x, y));
nsCOMPtr<nsISVGPoint> newPoint = new DOMSVGPoint(pt);
return newPoint.forget();
}
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