gecko-dev/dom/svg/SVGAnimatedPreserveAspectRa...

339 строки
9.5 KiB
C++

/* -*- 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 "mozilla/ArrayUtils.h"
#include "SVGAnimatedPreserveAspectRatio.h"
#include "mozilla/dom/SVGAnimatedPreserveAspectRatioBinding.h"
#include "nsSMILValue.h"
#include "nsSVGAttrTearoffTable.h"
#include "nsWhitespaceTokenizer.h"
#include "SMILEnumType.h"
#include "SVGContentUtils.h"
using namespace mozilla;
using namespace mozilla::dom;
////////////////////////////////////////////////////////////////////////
// SVGAnimatedPreserveAspectRatio class
NS_SVG_VAL_IMPL_CYCLE_COLLECTION_WRAPPERCACHED(DOMSVGAnimatedPreserveAspectRatio, mSVGElement)
NS_IMPL_CYCLE_COLLECTING_ADDREF(DOMSVGAnimatedPreserveAspectRatio)
NS_IMPL_CYCLE_COLLECTING_RELEASE(DOMSVGAnimatedPreserveAspectRatio)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(DOMSVGAnimatedPreserveAspectRatio)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
JSObject*
DOMSVGAnimatedPreserveAspectRatio::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
{
return SVGAnimatedPreserveAspectRatioBinding::Wrap(aCx, this, aGivenProto);
}
/* Implementation */
static const char *sAlignStrings[] =
{ "none", "xMinYMin", "xMidYMin", "xMaxYMin", "xMinYMid", "xMidYMid",
"xMaxYMid", "xMinYMax", "xMidYMax", "xMaxYMax" };
static const char *sMeetOrSliceStrings[] = { "meet", "slice" };
static nsSVGAttrTearoffTable<SVGAnimatedPreserveAspectRatio, DOMSVGAnimatedPreserveAspectRatio>
sSVGAnimatedPAspectRatioTearoffTable;
static nsSVGAttrTearoffTable<SVGAnimatedPreserveAspectRatio, DOMSVGPreserveAspectRatio>
sBaseSVGPAspectRatioTearoffTable;
static nsSVGAttrTearoffTable<SVGAnimatedPreserveAspectRatio, DOMSVGPreserveAspectRatio>
sAnimSVGPAspectRatioTearoffTable;
static uint16_t
GetAlignForString(const nsAString &aAlignString)
{
for (uint32_t i = 0 ; i < ArrayLength(sAlignStrings) ; i++) {
if (aAlignString.EqualsASCII(sAlignStrings[i])) {
return (i + SVG_ALIGN_MIN_VALID);
}
}
return SVG_PRESERVEASPECTRATIO_UNKNOWN;
}
static void
GetAlignString(nsAString& aAlignString, uint16_t aAlign)
{
NS_ASSERTION(
aAlign >= SVG_ALIGN_MIN_VALID && aAlign <= SVG_ALIGN_MAX_VALID,
"Unknown align");
aAlignString.AssignASCII(
sAlignStrings[aAlign - SVG_ALIGN_MIN_VALID]);
}
static uint16_t
GetMeetOrSliceForString(const nsAString &aMeetOrSlice)
{
for (uint32_t i = 0 ; i < ArrayLength(sMeetOrSliceStrings) ; i++) {
if (aMeetOrSlice.EqualsASCII(sMeetOrSliceStrings[i])) {
return (i + SVG_MEETORSLICE_MIN_VALID);
}
}
return SVG_MEETORSLICE_UNKNOWN;
}
static void
GetMeetOrSliceString(nsAString& aMeetOrSliceString, uint16_t aMeetOrSlice)
{
NS_ASSERTION(
aMeetOrSlice >= SVG_MEETORSLICE_MIN_VALID &&
aMeetOrSlice <= SVG_MEETORSLICE_MAX_VALID,
"Unknown meetOrSlice");
aMeetOrSliceString.AssignASCII(
sMeetOrSliceStrings[aMeetOrSlice - SVG_MEETORSLICE_MIN_VALID]);
}
already_AddRefed<DOMSVGPreserveAspectRatio>
DOMSVGAnimatedPreserveAspectRatio::BaseVal()
{
RefPtr<DOMSVGPreserveAspectRatio> domBaseVal =
sBaseSVGPAspectRatioTearoffTable.GetTearoff(mVal);
if (!domBaseVal) {
domBaseVal = new DOMSVGPreserveAspectRatio(mVal, mSVGElement, true);
sBaseSVGPAspectRatioTearoffTable.AddTearoff(mVal, domBaseVal);
}
return domBaseVal.forget();
}
DOMSVGPreserveAspectRatio::~DOMSVGPreserveAspectRatio()
{
if (mIsBaseValue) {
sBaseSVGPAspectRatioTearoffTable.RemoveTearoff(mVal);
} else {
sAnimSVGPAspectRatioTearoffTable.RemoveTearoff(mVal);
}
}
already_AddRefed<DOMSVGPreserveAspectRatio>
DOMSVGAnimatedPreserveAspectRatio::AnimVal()
{
RefPtr<DOMSVGPreserveAspectRatio> domAnimVal =
sAnimSVGPAspectRatioTearoffTable.GetTearoff(mVal);
if (!domAnimVal) {
domAnimVal = new DOMSVGPreserveAspectRatio(mVal, mSVGElement, false);
sAnimSVGPAspectRatioTearoffTable.AddTearoff(mVal, domAnimVal);
}
return domAnimVal.forget();
}
static nsresult
ToPreserveAspectRatio(const nsAString &aString,
SVGPreserveAspectRatio *aValue)
{
nsWhitespaceTokenizerTemplate<IsSVGWhitespace> tokenizer(aString);
if (tokenizer.whitespaceBeforeFirstToken() ||
!tokenizer.hasMoreTokens()) {
return NS_ERROR_DOM_SYNTAX_ERR;
}
const nsAString &token = tokenizer.nextToken();
nsresult rv;
SVGPreserveAspectRatio val;
rv = val.SetAlign(GetAlignForString(token));
if (NS_FAILED(rv)) {
return NS_ERROR_DOM_SYNTAX_ERR;
}
if (tokenizer.hasMoreTokens()) {
rv = val.SetMeetOrSlice(GetMeetOrSliceForString(tokenizer.nextToken()));
if (NS_FAILED(rv)) {
return NS_ERROR_DOM_SYNTAX_ERR;
}
} else {
val.SetMeetOrSlice(SVG_MEETORSLICE_MEET);
}
if (tokenizer.whitespaceAfterCurrentToken()) {
return NS_ERROR_DOM_SYNTAX_ERR;
}
*aValue = val;
return NS_OK;
}
nsresult
SVGAnimatedPreserveAspectRatio::SetBaseValueString(
const nsAString &aValueAsString, nsSVGElement *aSVGElement, bool aDoSetAttr)
{
SVGPreserveAspectRatio val;
nsresult res = ToPreserveAspectRatio(aValueAsString, &val);
if (NS_FAILED(res)) {
return res;
}
nsAttrValue emptyOrOldValue;
if (aDoSetAttr) {
emptyOrOldValue = aSVGElement->WillChangePreserveAspectRatio();
}
mBaseVal = val;
mIsBaseSet = true;
if (!mIsAnimated) {
mAnimVal = mBaseVal;
}
if (aDoSetAttr) {
aSVGElement->DidChangePreserveAspectRatio(emptyOrOldValue);
}
if (mIsAnimated) {
aSVGElement->AnimationNeedsResample();
}
return NS_OK;
}
void
SVGAnimatedPreserveAspectRatio::GetBaseValueString(
nsAString& aValueAsString) const
{
nsAutoString tmpString;
aValueAsString.Truncate();
GetAlignString(tmpString, mBaseVal.mAlign);
aValueAsString.Append(tmpString);
if (mBaseVal.mAlign != uint8_t(SVG_PRESERVEASPECTRATIO_NONE)) {
aValueAsString.Append(' ');
GetMeetOrSliceString(tmpString, mBaseVal.mMeetOrSlice);
aValueAsString.Append(tmpString);
}
}
void
SVGAnimatedPreserveAspectRatio::SetBaseValue(const SVGPreserveAspectRatio &aValue,
nsSVGElement *aSVGElement)
{
if (mIsBaseSet && mBaseVal == aValue) {
return;
}
nsAttrValue emptyOrOldValue = aSVGElement->WillChangePreserveAspectRatio();
mBaseVal = aValue;
mIsBaseSet = true;
if (!mIsAnimated) {
mAnimVal = mBaseVal;
}
aSVGElement->DidChangePreserveAspectRatio(emptyOrOldValue);
if (mIsAnimated) {
aSVGElement->AnimationNeedsResample();
}
}
static uint64_t
PackPreserveAspectRatio(const SVGPreserveAspectRatio& par)
{
// All preserveAspectRatio values are enum values (do not interpolate), so we
// can safely collate them and treat them as a single enum as for SMIL.
uint64_t packed = 0;
packed |= uint64_t(par.GetAlign()) << 8;
packed |= uint64_t(par.GetMeetOrSlice());
return packed;
}
void
SVGAnimatedPreserveAspectRatio::SetAnimValue(uint64_t aPackedValue,
nsSVGElement *aSVGElement)
{
if (mIsAnimated && PackPreserveAspectRatio(mAnimVal) == aPackedValue) {
return;
}
mAnimVal.SetAlign(uint16_t((aPackedValue & 0xff00) >> 8));
mAnimVal.SetMeetOrSlice(uint16_t(aPackedValue & 0xff));
mIsAnimated = true;
aSVGElement->DidAnimatePreserveAspectRatio();
}
already_AddRefed<DOMSVGAnimatedPreserveAspectRatio>
SVGAnimatedPreserveAspectRatio::ToDOMAnimatedPreserveAspectRatio(
nsSVGElement *aSVGElement)
{
RefPtr<DOMSVGAnimatedPreserveAspectRatio> domAnimatedPAspectRatio =
sSVGAnimatedPAspectRatioTearoffTable.GetTearoff(this);
if (!domAnimatedPAspectRatio) {
domAnimatedPAspectRatio = new DOMSVGAnimatedPreserveAspectRatio(this, aSVGElement);
sSVGAnimatedPAspectRatioTearoffTable.AddTearoff(this, domAnimatedPAspectRatio);
}
return domAnimatedPAspectRatio.forget();
}
DOMSVGAnimatedPreserveAspectRatio::~DOMSVGAnimatedPreserveAspectRatio()
{
sSVGAnimatedPAspectRatioTearoffTable.RemoveTearoff(mVal);
}
nsISMILAttr*
SVGAnimatedPreserveAspectRatio::ToSMILAttr(nsSVGElement *aSVGElement)
{
return new SMILPreserveAspectRatio(this, aSVGElement);
}
// typedef for inner class, to make function signatures shorter below:
typedef SVGAnimatedPreserveAspectRatio::SMILPreserveAspectRatio
SMILPreserveAspectRatio;
nsresult
SMILPreserveAspectRatio::ValueFromString(const nsAString& aStr,
const SVGAnimationElement* /*aSrcElement*/,
nsSMILValue& aValue,
bool& aPreventCachingOfSandwich) const
{
SVGPreserveAspectRatio par;
nsresult res = ToPreserveAspectRatio(aStr, &par);
NS_ENSURE_SUCCESS(res, res);
nsSMILValue val(SMILEnumType::Singleton());
val.mU.mUint = PackPreserveAspectRatio(par);
aValue = val;
aPreventCachingOfSandwich = false;
return NS_OK;
}
nsSMILValue
SMILPreserveAspectRatio::GetBaseValue() const
{
nsSMILValue val(SMILEnumType::Singleton());
val.mU.mUint = PackPreserveAspectRatio(mVal->GetBaseValue());
return val;
}
void
SMILPreserveAspectRatio::ClearAnimValue()
{
if (mVal->mIsAnimated) {
mVal->mIsAnimated = false;
mVal->mAnimVal = mVal->mBaseVal;
mSVGElement->DidAnimatePreserveAspectRatio();
}
}
nsresult
SMILPreserveAspectRatio::SetAnimValue(const nsSMILValue& aValue)
{
NS_ASSERTION(aValue.mType == SMILEnumType::Singleton(),
"Unexpected type to assign animated value");
if (aValue.mType == SMILEnumType::Singleton()) {
mVal->SetAnimValue(aValue.mU.mUint, mSVGElement);
}
return NS_OK;
}