зеркало из https://github.com/mozilla/gecko-dev.git
432 строки
11 KiB
C++
432 строки
11 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsSVGAngle.h"
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#include "mozilla/ArrayUtils.h"
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#include "mozilla/dom/SVGMarkerElement.h"
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#include "mozilla/Move.h"
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#include "nsContentUtils.h" // NS_ENSURE_FINITE
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#include "nsSMILValue.h"
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#include "nsSVGAttrTearoffTable.h"
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#include "nsTextFormatter.h"
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#include "SVGAngle.h"
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#include "SVGAnimatedAngle.h"
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#include "SVGOrientSMILType.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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static nsIAtom** const unitMap[] =
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{
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nullptr, /* SVG_ANGLETYPE_UNKNOWN */
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nullptr, /* SVG_ANGLETYPE_UNSPECIFIED */
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&nsGkAtoms::deg,
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&nsGkAtoms::rad,
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&nsGkAtoms::grad
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};
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static nsSVGAttrTearoffTable<nsSVGAngle, SVGAnimatedAngle>
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sSVGAnimatedAngleTearoffTable;
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static nsSVGAttrTearoffTable<nsSVGAngle, SVGAngle>
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sBaseSVGAngleTearoffTable;
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static nsSVGAttrTearoffTable<nsSVGAngle, SVGAngle>
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sAnimSVGAngleTearoffTable;
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/* Helper functions */
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static bool
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IsValidUnitType(uint16_t unit)
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{
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if (unit > SVG_ANGLETYPE_UNKNOWN &&
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unit <= SVG_ANGLETYPE_GRAD)
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return true;
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return false;
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}
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static void
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GetUnitString(nsAString& unit, uint16_t unitType)
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{
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if (IsValidUnitType(unitType)) {
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if (unitMap[unitType]) {
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(*unitMap[unitType])->ToString(unit);
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}
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return;
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}
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NS_NOTREACHED("Unknown unit type");
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return;
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}
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static uint16_t
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GetUnitTypeForString(const nsAString& unitStr)
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{
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if (unitStr.IsEmpty())
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return SVG_ANGLETYPE_UNSPECIFIED;
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nsIAtom *unitAtom = NS_GetStaticAtom(unitStr);
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if (unitAtom) {
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for (uint32_t i = 0 ; i < ArrayLength(unitMap) ; i++) {
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if (unitMap[i] && *unitMap[i] == unitAtom) {
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return i;
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}
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}
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}
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return SVG_ANGLETYPE_UNKNOWN;
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}
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static void
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GetValueString(nsAString &aValueAsString, float aValue, uint16_t aUnitType)
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{
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char16_t buf[24];
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nsTextFormatter::snprintf(buf, sizeof(buf)/sizeof(char16_t),
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u"%g",
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(double)aValue);
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aValueAsString.Assign(buf);
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nsAutoString unitString;
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GetUnitString(unitString, aUnitType);
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aValueAsString.Append(unitString);
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}
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static bool
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GetValueFromString(const nsAString& aString,
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float& aValue,
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uint16_t* aUnitType)
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{
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RangedPtr<const char16_t> iter =
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SVGContentUtils::GetStartRangedPtr(aString);
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const RangedPtr<const char16_t> end =
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SVGContentUtils::GetEndRangedPtr(aString);
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if (!SVGContentUtils::ParseNumber(iter, end, aValue)) {
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return false;
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}
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const nsAString& units = Substring(iter.get(), end.get());
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*aUnitType = GetUnitTypeForString(units);
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return IsValidUnitType(*aUnitType);
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}
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/* static */ float
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nsSVGAngle::GetDegreesPerUnit(uint8_t aUnit)
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{
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switch (aUnit) {
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case SVG_ANGLETYPE_UNSPECIFIED:
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case SVG_ANGLETYPE_DEG:
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return 1;
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case SVG_ANGLETYPE_RAD:
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return static_cast<float>(180.0 / M_PI);
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case SVG_ANGLETYPE_GRAD:
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return 90.0f / 100.0f;
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default:
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NS_NOTREACHED("Unknown unit type");
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return 0;
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}
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}
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void
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nsSVGAngle::SetBaseValueInSpecifiedUnits(float aValue,
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nsSVGElement *aSVGElement)
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{
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if (mBaseVal == aValue) {
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return;
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}
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nsAttrValue emptyOrOldValue = aSVGElement->WillChangeAngle(mAttrEnum);
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mBaseVal = aValue;
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if (!mIsAnimated) {
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mAnimVal = mBaseVal;
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}
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else {
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aSVGElement->AnimationNeedsResample();
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}
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aSVGElement->DidChangeAngle(mAttrEnum, emptyOrOldValue);
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}
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nsresult
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nsSVGAngle::ConvertToSpecifiedUnits(uint16_t unitType,
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nsSVGElement *aSVGElement)
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{
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if (!IsValidUnitType(unitType))
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return NS_ERROR_DOM_NOT_SUPPORTED_ERR;
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if (mBaseValUnit == uint8_t(unitType))
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return NS_OK;
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nsAttrValue emptyOrOldValue;
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if (aSVGElement) {
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emptyOrOldValue = aSVGElement->WillChangeAngle(mAttrEnum);
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}
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float valueInUserUnits = mBaseVal * GetDegreesPerUnit(mBaseValUnit);
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mBaseValUnit = uint8_t(unitType);
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// Setting aDoSetAttr to false here will ensure we don't call
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// Will/DidChangeAngle a second time (and dispatch duplicate notifications).
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SetBaseValue(valueInUserUnits, aSVGElement, false);
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if (aSVGElement) {
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aSVGElement->DidChangeAngle(mAttrEnum, emptyOrOldValue);
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}
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return NS_OK;
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}
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nsresult
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nsSVGAngle::NewValueSpecifiedUnits(uint16_t unitType,
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float valueInSpecifiedUnits,
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nsSVGElement *aSVGElement)
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{
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NS_ENSURE_FINITE(valueInSpecifiedUnits, NS_ERROR_ILLEGAL_VALUE);
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if (!IsValidUnitType(unitType))
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return NS_ERROR_DOM_NOT_SUPPORTED_ERR;
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if (mBaseVal == valueInSpecifiedUnits && mBaseValUnit == uint8_t(unitType))
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return NS_OK;
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nsAttrValue emptyOrOldValue;
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if (aSVGElement) {
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emptyOrOldValue = aSVGElement->WillChangeAngle(mAttrEnum);
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}
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mBaseVal = valueInSpecifiedUnits;
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mBaseValUnit = uint8_t(unitType);
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if (!mIsAnimated) {
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mAnimVal = mBaseVal;
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mAnimValUnit = mBaseValUnit;
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}
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else {
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aSVGElement->AnimationNeedsResample();
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}
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if (aSVGElement) {
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aSVGElement->DidChangeAngle(mAttrEnum, emptyOrOldValue);
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}
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return NS_OK;
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}
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already_AddRefed<SVGAngle>
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nsSVGAngle::ToDOMBaseVal(nsSVGElement *aSVGElement)
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{
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RefPtr<SVGAngle> domBaseVal =
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sBaseSVGAngleTearoffTable.GetTearoff(this);
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if (!domBaseVal) {
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domBaseVal = new SVGAngle(this, aSVGElement, SVGAngle::BaseValue);
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sBaseSVGAngleTearoffTable.AddTearoff(this, domBaseVal);
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}
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return domBaseVal.forget();
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}
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already_AddRefed<SVGAngle>
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nsSVGAngle::ToDOMAnimVal(nsSVGElement *aSVGElement)
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{
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RefPtr<SVGAngle> domAnimVal =
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sAnimSVGAngleTearoffTable.GetTearoff(this);
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if (!domAnimVal) {
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domAnimVal = new SVGAngle(this, aSVGElement, SVGAngle::AnimValue);
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sAnimSVGAngleTearoffTable.AddTearoff(this, domAnimVal);
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}
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return domAnimVal.forget();
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}
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SVGAngle::~SVGAngle()
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{
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if (mType == BaseValue) {
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sBaseSVGAngleTearoffTable.RemoveTearoff(mVal);
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} else if (mType == AnimValue) {
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sAnimSVGAngleTearoffTable.RemoveTearoff(mVal);
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} else {
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delete mVal;
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}
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}
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/* Implementation */
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nsresult
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nsSVGAngle::SetBaseValueString(const nsAString &aValueAsString,
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nsSVGElement *aSVGElement,
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bool aDoSetAttr)
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{
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float value;
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uint16_t unitType;
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if (!GetValueFromString(aValueAsString, value, &unitType)) {
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return NS_ERROR_DOM_SYNTAX_ERR;
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}
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if (mBaseVal == value && mBaseValUnit == uint8_t(unitType)) {
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return NS_OK;
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}
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nsAttrValue emptyOrOldValue;
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if (aDoSetAttr) {
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emptyOrOldValue = aSVGElement->WillChangeAngle(mAttrEnum);
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}
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mBaseVal = value;
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mBaseValUnit = uint8_t(unitType);
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if (!mIsAnimated) {
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mAnimVal = mBaseVal;
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mAnimValUnit = mBaseValUnit;
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}
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else {
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aSVGElement->AnimationNeedsResample();
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}
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if (aDoSetAttr) {
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aSVGElement->DidChangeAngle(mAttrEnum, emptyOrOldValue);
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}
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return NS_OK;
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}
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void
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nsSVGAngle::GetBaseValueString(nsAString & aValueAsString) const
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{
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GetValueString(aValueAsString, mBaseVal, mBaseValUnit);
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}
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void
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nsSVGAngle::GetAnimValueString(nsAString & aValueAsString) const
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{
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GetValueString(aValueAsString, mAnimVal, mAnimValUnit);
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}
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void
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nsSVGAngle::SetBaseValue(float aValue, nsSVGElement *aSVGElement,
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bool aDoSetAttr)
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{
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if (mBaseVal == aValue * GetDegreesPerUnit(mBaseValUnit)) {
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return;
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}
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nsAttrValue emptyOrOldValue;
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if (aSVGElement && aDoSetAttr) {
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emptyOrOldValue = aSVGElement->WillChangeAngle(mAttrEnum);
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}
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mBaseVal = aValue / GetDegreesPerUnit(mBaseValUnit);
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if (!mIsAnimated) {
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mAnimVal = mBaseVal;
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}
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else {
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aSVGElement->AnimationNeedsResample();
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}
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if (aSVGElement && aDoSetAttr) {
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aSVGElement->DidChangeAngle(mAttrEnum, emptyOrOldValue);
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}
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}
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void
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nsSVGAngle::SetAnimValue(float aValue, uint8_t aUnit, nsSVGElement *aSVGElement)
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{
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if (mIsAnimated && mAnimVal == aValue && mAnimValUnit == aUnit) {
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return;
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}
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mAnimVal = aValue;
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mAnimValUnit = aUnit;
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mIsAnimated = true;
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aSVGElement->DidAnimateAngle(mAttrEnum);
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}
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already_AddRefed<SVGAnimatedAngle>
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nsSVGAngle::ToDOMAnimatedAngle(nsSVGElement *aSVGElement)
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{
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RefPtr<SVGAnimatedAngle> domAnimatedAngle =
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sSVGAnimatedAngleTearoffTable.GetTearoff(this);
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if (!domAnimatedAngle) {
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domAnimatedAngle = new SVGAnimatedAngle(this, aSVGElement);
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sSVGAnimatedAngleTearoffTable.AddTearoff(this, domAnimatedAngle);
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}
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return domAnimatedAngle.forget();
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}
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SVGAnimatedAngle::~SVGAnimatedAngle()
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{
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sSVGAnimatedAngleTearoffTable.RemoveTearoff(mVal);
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}
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nsISMILAttr*
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nsSVGAngle::ToSMILAttr(nsSVGElement *aSVGElement)
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{
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if (aSVGElement->NodeInfo()->Equals(nsGkAtoms::marker, kNameSpaceID_SVG)) {
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SVGMarkerElement *marker = static_cast<SVGMarkerElement*>(aSVGElement);
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return new SMILOrient(marker->GetOrientType(), this, aSVGElement);
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}
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// SMILOrient would not be useful for general angle attributes (also,
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// "orient" is the only animatable <angle>-valued attribute in SVG 1.1).
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NS_NOTREACHED("Trying to animate unknown angle attribute.");
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return nullptr;
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}
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nsresult
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nsSVGAngle::SMILOrient::ValueFromString(const nsAString& aStr,
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const SVGAnimationElement* /*aSrcElement*/,
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nsSMILValue& aValue,
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bool& aPreventCachingOfSandwich) const
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{
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nsSMILValue val(&SVGOrientSMILType::sSingleton);
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if (aStr.EqualsLiteral("auto")) {
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val.mU.mOrient.mOrientType = SVG_MARKER_ORIENT_AUTO;
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} else if (aStr.EqualsLiteral("auto-start-reverse")) {
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val.mU.mOrient.mOrientType = SVG_MARKER_ORIENT_AUTO_START_REVERSE;
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} else {
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float value;
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uint16_t unitType;
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if (!GetValueFromString(aStr, value, &unitType)) {
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return NS_ERROR_DOM_SYNTAX_ERR;
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}
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val.mU.mOrient.mAngle = value;
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val.mU.mOrient.mUnit = unitType;
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val.mU.mOrient.mOrientType = SVG_MARKER_ORIENT_ANGLE;
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}
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aValue = Move(val);
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aPreventCachingOfSandwich = false;
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return NS_OK;
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}
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nsSMILValue
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nsSVGAngle::SMILOrient::GetBaseValue() const
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{
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nsSMILValue val(&SVGOrientSMILType::sSingleton);
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val.mU.mOrient.mAngle = mAngle->GetBaseValInSpecifiedUnits();
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val.mU.mOrient.mUnit = mAngle->GetBaseValueUnit();
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val.mU.mOrient.mOrientType = mOrientType->GetBaseValue();
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return val;
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}
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void
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nsSVGAngle::SMILOrient::ClearAnimValue()
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{
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if (mAngle->mIsAnimated) {
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mOrientType->SetAnimValue(mOrientType->GetBaseValue());
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mAngle->mIsAnimated = false;
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mAngle->mAnimVal = mAngle->mBaseVal;
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mAngle->mAnimValUnit = mAngle->mBaseValUnit;
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mSVGElement->DidAnimateAngle(mAngle->mAttrEnum);
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}
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}
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nsresult
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nsSVGAngle::SMILOrient::SetAnimValue(const nsSMILValue& aValue)
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{
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NS_ASSERTION(aValue.mType == &SVGOrientSMILType::sSingleton,
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"Unexpected type to assign animated value");
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if (aValue.mType == &SVGOrientSMILType::sSingleton) {
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mOrientType->SetAnimValue(aValue.mU.mOrient.mOrientType);
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if (aValue.mU.mOrient.mOrientType == SVG_MARKER_ORIENT_AUTO ||
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aValue.mU.mOrient.mOrientType == SVG_MARKER_ORIENT_AUTO_START_REVERSE) {
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mAngle->SetAnimValue(0.0f, SVG_ANGLETYPE_UNSPECIFIED, mSVGElement);
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} else {
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mAngle->SetAnimValue(aValue.mU.mOrient.mAngle, aValue.mU.mOrient.mUnit, mSVGElement);
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}
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}
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return NS_OK;
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}
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