Add m-esr52 at 52.6.0

1 files changed, 529 insertions, 0 deletions

diff --git a/dom/svg/nsSVGLength2.cpp b/dom/svg/nsSVGLength2.cpp
new file mode 100644
index 000000000..1deec1006
--- /dev/null
+++ b/dom/svg/nsSVGLength2.cpp
@@ -0,0 +1,529 @@
+/* -*- 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 "nsSVGLength2.h"
+#include "mozilla/dom/SVGAnimatedLength.h"
+#include "mozilla/dom/SVGSVGElement.h"
+#include "nsContentUtils.h" // NS_ENSURE_FINITE
+#include "nsIFrame.h"
+#include "nsSMILFloatType.h"
+#include "nsSMILValue.h"
+#include "nsSVGAttrTearoffTable.h"
+#include "nsSVGIntegrationUtils.h"
+#include "nsTextFormatter.h"
+#include "DOMSVGLength.h"
+#include "LayoutLogging.h"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+static nsIAtom** const unitMap[] =
+{
+  nullptr, /* SVG_LENGTHTYPE_UNKNOWN */
+  nullptr, /* SVG_LENGTHTYPE_NUMBER */
+  &nsGkAtoms::percentage,
+  &nsGkAtoms::em,
+  &nsGkAtoms::ex,
+  &nsGkAtoms::px,
+  &nsGkAtoms::cm,
+  &nsGkAtoms::mm,
+  &nsGkAtoms::in,
+  &nsGkAtoms::pt,
+  &nsGkAtoms::pc
+};
+
+static nsSVGAttrTearoffTable<nsSVGLength2, SVGAnimatedLength>
+  sSVGAnimatedLengthTearoffTable;
+
+/* Helper functions */
+
+static bool
+IsValidUnitType(uint16_t unit)
+{
+  if (unit > nsIDOMSVGLength::SVG_LENGTHTYPE_UNKNOWN &&
+      unit <= nsIDOMSVGLength::SVG_LENGTHTYPE_PC)
+    return true;
+
+  return false;
+}
+
+static void
+GetUnitString(nsAString& unit, uint16_t unitType)
+{
+  if (IsValidUnitType(unitType)) {
+    if (unitMap[unitType]) {
+      (*unitMap[unitType])->ToString(unit);
+    }
+    return;
+  }
+
+  NS_NOTREACHED("Unknown unit type");
+  return;
+}
+
+static uint16_t
+GetUnitTypeForString(const nsAString& unitStr)
+{
+  if (unitStr.IsEmpty()) 
+    return nsIDOMSVGLength::SVG_LENGTHTYPE_NUMBER;
+                   
+  nsIAtom *unitAtom = NS_GetStaticAtom(unitStr);
+  if (unitAtom) {
+    for (uint32_t i = 0 ; i < ArrayLength(unitMap) ; i++) {
+      if (unitMap[i] && *unitMap[i] == unitAtom) {
+        return i;
+      }
+    }
+  }
+
+  return nsIDOMSVGLength::SVG_LENGTHTYPE_UNKNOWN;
+}
+
+static void
+GetValueString(nsAString &aValueAsString, float aValue, uint16_t aUnitType)
+{
+  char16_t buf[24];
+  nsTextFormatter::snprintf(buf, sizeof(buf)/sizeof(char16_t),
+                            u"%g",
+                            (double)aValue);
+  aValueAsString.Assign(buf);
+
+  nsAutoString unitString;
+  GetUnitString(unitString, aUnitType);
+  aValueAsString.Append(unitString);
+}
+
+static bool
+GetValueFromString(const nsAString& aString,
+                   float& aValue,
+                   uint16_t* aUnitType)
+{
+  RangedPtr<const char16_t> iter =
+    SVGContentUtils::GetStartRangedPtr(aString);
+  const RangedPtr<const char16_t> end =
+    SVGContentUtils::GetEndRangedPtr(aString);
+
+  if (!SVGContentUtils::ParseNumber(iter, end, aValue)) {
+    return false;
+  }
+  const nsAString& units = Substring(iter.get(), end.get());
+  *aUnitType = GetUnitTypeForString(units);
+  return IsValidUnitType(*aUnitType);
+}
+
+static float GetMMPerPixel() { return MM_PER_INCH_FLOAT / 96; }
+
+static float
+FixAxisLength(float aLength)
+{
+  if (aLength == 0.0f) {
+    LAYOUT_WARNING("zero axis length");
+    return 1e-20f;
+  }
+  return aLength;
+}
+
+SVGElementMetrics::SVGElementMetrics(nsSVGElement* aSVGElement,
+                                     SVGSVGElement* aCtx)
+  : mSVGElement(aSVGElement)
+  , mCtx(aCtx)
+{
+}
+
+float
+SVGElementMetrics::GetEmLength() const
+{
+  return SVGContentUtils::GetFontSize(mSVGElement);
+}
+
+float
+SVGElementMetrics::GetExLength() const
+{
+  return SVGContentUtils::GetFontXHeight(mSVGElement);
+}
+
+float
+SVGElementMetrics::GetAxisLength(uint8_t aCtxType) const
+{
+  if (!EnsureCtx()) {
+    return 1;
+  }
+
+  return FixAxisLength(mCtx->GetLength(aCtxType));
+}
+
+bool
+SVGElementMetrics::EnsureCtx() const
+{
+  if (!mCtx && mSVGElement) {
+    mCtx = mSVGElement->GetCtx();
+    if (!mCtx && mSVGElement->IsSVGElement(nsGkAtoms::svg)) {
+      // mSVGElement must be the outer svg element
+      mCtx = static_cast<SVGSVGElement*>(mSVGElement);
+    }
+  }
+  return mCtx != nullptr;
+}
+
+NonSVGFrameUserSpaceMetrics::NonSVGFrameUserSpaceMetrics(nsIFrame* aFrame)
+  : mFrame(aFrame)
+{
+}
+
+float
+NonSVGFrameUserSpaceMetrics::GetEmLength() const
+{
+  return SVGContentUtils::GetFontSize(mFrame);
+}
+
+float
+NonSVGFrameUserSpaceMetrics::GetExLength() const
+{
+  return SVGContentUtils::GetFontXHeight(mFrame);
+}
+
+gfx::Size
+NonSVGFrameUserSpaceMetrics::GetSize() const
+{
+  return nsSVGIntegrationUtils::GetSVGCoordContextForNonSVGFrame(mFrame);
+}
+
+float
+UserSpaceMetricsWithSize::GetAxisLength(uint8_t aCtxType) const
+{
+  gfx::Size size = GetSize();
+  float length;
+  switch (aCtxType) {
+  case SVGContentUtils::X:
+    length = size.width;
+    break;
+  case SVGContentUtils::Y:
+    length = size.height;
+    break;
+  case SVGContentUtils::XY:
+    length = SVGContentUtils::ComputeNormalizedHypotenuse(size.width, size.height);
+    break;
+  default:
+    NS_NOTREACHED("Unknown axis type");
+    length = 1;
+    break;
+  }
+  return FixAxisLength(length);
+}
+
+float
+nsSVGLength2::GetUnitScaleFactor(nsSVGElement *aSVGElement,
+                                 uint8_t aUnitType) const
+{
+  return GetUnitScaleFactor(SVGElementMetrics(aSVGElement), aUnitType);
+}
+
+float
+nsSVGLength2::GetUnitScaleFactor(SVGSVGElement *aCtx, uint8_t aUnitType) const
+{
+  return GetUnitScaleFactor(SVGElementMetrics(aCtx, aCtx), aUnitType);
+}
+
+float
+nsSVGLength2::GetUnitScaleFactor(nsIFrame *aFrame, uint8_t aUnitType) const
+{
+  nsIContent* content = aFrame->GetContent();
+  if (content->IsSVGElement()) {
+    return GetUnitScaleFactor(SVGElementMetrics(static_cast<nsSVGElement*>(content)), aUnitType);
+  }
+  return GetUnitScaleFactor(NonSVGFrameUserSpaceMetrics(aFrame), aUnitType);
+}
+
+float
+nsSVGLength2::GetUnitScaleFactor(const UserSpaceMetrics& aMetrics, uint8_t aUnitType) const
+{
+  switch (aUnitType) {
+  case nsIDOMSVGLength::SVG_LENGTHTYPE_NUMBER:
+  case nsIDOMSVGLength::SVG_LENGTHTYPE_PX:
+    return 1;
+  case nsIDOMSVGLength::SVG_LENGTHTYPE_MM:
+    return GetMMPerPixel();
+  case nsIDOMSVGLength::SVG_LENGTHTYPE_CM:
+    return GetMMPerPixel() / 10.0f;
+  case nsIDOMSVGLength::SVG_LENGTHTYPE_IN:
+    return GetMMPerPixel() / MM_PER_INCH_FLOAT;
+  case nsIDOMSVGLength::SVG_LENGTHTYPE_PT:
+    return GetMMPerPixel() * POINTS_PER_INCH_FLOAT / MM_PER_INCH_FLOAT;
+  case nsIDOMSVGLength::SVG_LENGTHTYPE_PC:
+    return GetMMPerPixel() * POINTS_PER_INCH_FLOAT / MM_PER_INCH_FLOAT / 12.0f;
+  case nsIDOMSVGLength::SVG_LENGTHTYPE_PERCENTAGE:
+    return 100.0f / aMetrics.GetAxisLength(mCtxType);
+  case nsIDOMSVGLength::SVG_LENGTHTYPE_EMS:
+    return 1 / aMetrics.GetEmLength();
+  case nsIDOMSVGLength::SVG_LENGTHTYPE_EXS:
+    return 1 / aMetrics.GetExLength();
+  default:
+    NS_NOTREACHED("Unknown unit type");
+    return 0;
+  }
+}
+
+void
+nsSVGLength2::SetBaseValueInSpecifiedUnits(float aValue,
+                                           nsSVGElement *aSVGElement,
+                                           bool aDoSetAttr)
+{
+  if (mIsBaseSet && mBaseVal == aValue) {
+    return;
+  }
+
+  nsAttrValue emptyOrOldValue;
+  if (aDoSetAttr) {
+    emptyOrOldValue = aSVGElement->WillChangeLength(mAttrEnum);
+  }
+  mBaseVal = aValue;
+  mIsBaseSet = true;
+  if (!mIsAnimated) {
+    mAnimVal = mBaseVal;
+  }
+  else {
+    aSVGElement->AnimationNeedsResample();
+  }
+  if (aDoSetAttr) {
+    aSVGElement->DidChangeLength(mAttrEnum, emptyOrOldValue);
+  }
+}
+
+nsresult
+nsSVGLength2::ConvertToSpecifiedUnits(uint16_t unitType,
+                                      nsSVGElement *aSVGElement)
+{
+  if (!IsValidUnitType(unitType))
+    return NS_ERROR_DOM_NOT_SUPPORTED_ERR;
+
+  if (mIsBaseSet && mSpecifiedUnitType == uint8_t(unitType))
+    return NS_OK;
+
+  // Even though we're not changing the visual effect this length will have
+  // on the document, we still need to send out notifications in case we have
+  // mutation listeners, since the actual string value of the attribute will
+  // change.
+  nsAttrValue emptyOrOldValue = aSVGElement->WillChangeLength(mAttrEnum);
+
+  float valueInUserUnits =
+    mBaseVal / GetUnitScaleFactor(aSVGElement, mSpecifiedUnitType);
+  mSpecifiedUnitType = uint8_t(unitType);
+  // Setting aDoSetAttr to false here will ensure we don't call
+  // Will/DidChangeAngle a second time (and dispatch duplicate notifications).
+  SetBaseValue(valueInUserUnits, aSVGElement, false);
+
+  aSVGElement->DidChangeLength(mAttrEnum, emptyOrOldValue);
+
+  return NS_OK;
+}
+
+nsresult
+nsSVGLength2::NewValueSpecifiedUnits(uint16_t unitType,
+                                     float valueInSpecifiedUnits,
+                                     nsSVGElement *aSVGElement)
+{
+  NS_ENSURE_FINITE(valueInSpecifiedUnits, NS_ERROR_ILLEGAL_VALUE);
+
+  if (!IsValidUnitType(unitType))
+    return NS_ERROR_DOM_NOT_SUPPORTED_ERR;
+
+  if (mIsBaseSet && mBaseVal == valueInSpecifiedUnits &&
+      mSpecifiedUnitType == uint8_t(unitType)) {
+    return NS_OK;
+  }
+
+  nsAttrValue emptyOrOldValue = aSVGElement->WillChangeLength(mAttrEnum);
+  mBaseVal = valueInSpecifiedUnits;
+  mIsBaseSet = true;
+  mSpecifiedUnitType = uint8_t(unitType);
+  if (!mIsAnimated) {
+    mAnimVal = mBaseVal;
+  }
+  else {
+    aSVGElement->AnimationNeedsResample();
+  }
+  aSVGElement->DidChangeLength(mAttrEnum, emptyOrOldValue);
+  return NS_OK;
+}
+
+nsresult
+nsSVGLength2::ToDOMBaseVal(DOMSVGLength **aResult, nsSVGElement *aSVGElement)
+{
+  RefPtr<DOMSVGLength> domBaseVal =
+    DOMSVGLength::GetTearOff(this, aSVGElement, false);
+
+  domBaseVal.forget(aResult);
+  return NS_OK;
+}
+
+nsresult
+nsSVGLength2::ToDOMAnimVal(DOMSVGLength **aResult, nsSVGElement *aSVGElement)
+{
+  RefPtr<DOMSVGLength> domAnimVal =
+    DOMSVGLength::GetTearOff(this, aSVGElement, true);
+
+  domAnimVal.forget(aResult);
+  return NS_OK;
+}
+
+/* Implementation */
+
+nsresult
+nsSVGLength2::SetBaseValueString(const nsAString &aValueAsString,
+                                 nsSVGElement *aSVGElement,
+                                 bool aDoSetAttr)
+{
+  float value;
+  uint16_t unitType;
+
+  if (!GetValueFromString(aValueAsString, value, &unitType)) {
+    return NS_ERROR_DOM_SYNTAX_ERR;
+  }
+
+  if (mIsBaseSet && mBaseVal == float(value) &&
+      mSpecifiedUnitType == uint8_t(unitType)) {
+    return NS_OK;
+  }
+
+  nsAttrValue emptyOrOldValue;
+  if (aDoSetAttr) {
+    emptyOrOldValue = aSVGElement->WillChangeLength(mAttrEnum);
+  }
+  mBaseVal = value;
+  mIsBaseSet = true;
+  mSpecifiedUnitType = uint8_t(unitType);
+  if (!mIsAnimated) {
+    mAnimVal = mBaseVal;
+  }
+  else {
+    aSVGElement->AnimationNeedsResample();
+  }
+
+  if (aDoSetAttr) {
+    aSVGElement->DidChangeLength(mAttrEnum, emptyOrOldValue);
+  }
+  return NS_OK;
+}
+
+void
+nsSVGLength2::GetBaseValueString(nsAString & aValueAsString) const
+{
+  GetValueString(aValueAsString, mBaseVal, mSpecifiedUnitType);
+}
+
+void
+nsSVGLength2::GetAnimValueString(nsAString & aValueAsString) const
+{
+  GetValueString(aValueAsString, mAnimVal, mSpecifiedUnitType);
+}
+
+void
+nsSVGLength2::SetBaseValue(float aValue, nsSVGElement *aSVGElement,
+                           bool aDoSetAttr)
+{
+  SetBaseValueInSpecifiedUnits(aValue * GetUnitScaleFactor(aSVGElement,
+                                                           mSpecifiedUnitType),
+                               aSVGElement, aDoSetAttr);
+}
+
+void
+nsSVGLength2::SetAnimValueInSpecifiedUnits(float aValue,
+                                           nsSVGElement* aSVGElement)
+{
+  if (mAnimVal == aValue && mIsAnimated) {
+    return;
+  }
+  mAnimVal = aValue;
+  mIsAnimated = true;
+  aSVGElement->DidAnimateLength(mAttrEnum);
+}
+
+void
+nsSVGLength2::SetAnimValue(float aValue, nsSVGElement *aSVGElement)
+{
+  SetAnimValueInSpecifiedUnits(aValue * GetUnitScaleFactor(aSVGElement,
+                                                           mSpecifiedUnitType),
+                               aSVGElement);
+}
+
+already_AddRefed<SVGAnimatedLength>
+nsSVGLength2::ToDOMAnimatedLength(nsSVGElement* aSVGElement)
+{
+  RefPtr<SVGAnimatedLength> svgAnimatedLength =
+    sSVGAnimatedLengthTearoffTable.GetTearoff(this);
+  if (!svgAnimatedLength) {
+    svgAnimatedLength = new SVGAnimatedLength(this, aSVGElement);
+    sSVGAnimatedLengthTearoffTable.AddTearoff(this, svgAnimatedLength);
+  }
+
+  return svgAnimatedLength.forget();
+}
+
+SVGAnimatedLength::~SVGAnimatedLength()
+{
+  sSVGAnimatedLengthTearoffTable.RemoveTearoff(mVal);
+}
+
+nsISMILAttr*
+nsSVGLength2::ToSMILAttr(nsSVGElement *aSVGElement)
+{
+  return new SMILLength(this, aSVGElement);
+}
+
+nsresult
+nsSVGLength2::SMILLength::ValueFromString(const nsAString& aStr,
+                                 const SVGAnimationElement* /*aSrcElement*/,
+                                 nsSMILValue& aValue,
+                                 bool& aPreventCachingOfSandwich) const
+{
+  float value;
+  uint16_t unitType;
+  
+  if (!GetValueFromString(aStr, value, &unitType)) {
+    return NS_ERROR_DOM_SYNTAX_ERR;
+  }
+
+  nsSMILValue val(nsSMILFloatType::Singleton());
+  val.mU.mDouble = value / mVal->GetUnitScaleFactor(mSVGElement, unitType);
+  aValue = val;
+  aPreventCachingOfSandwich =
+              (unitType == nsIDOMSVGLength::SVG_LENGTHTYPE_PERCENTAGE ||
+               unitType == nsIDOMSVGLength::SVG_LENGTHTYPE_EMS ||
+               unitType == nsIDOMSVGLength::SVG_LENGTHTYPE_EXS);
+
+  return NS_OK;
+}
+
+nsSMILValue
+nsSVGLength2::SMILLength::GetBaseValue() const
+{
+  nsSMILValue val(nsSMILFloatType::Singleton());
+  val.mU.mDouble = mVal->GetBaseValue(mSVGElement);
+  return val;
+}
+
+void
+nsSVGLength2::SMILLength::ClearAnimValue()
+{
+  if (mVal->mIsAnimated) {
+    mVal->mIsAnimated = false;
+    mVal->mAnimVal = mVal->mBaseVal;
+    mSVGElement->DidAnimateLength(mVal->mAttrEnum);
+  }  
+}
+
+nsresult
+nsSVGLength2::SMILLength::SetAnimValue(const nsSMILValue& aValue)
+{
+  NS_ASSERTION(aValue.mType == nsSMILFloatType::Singleton(),
+    "Unexpected type to assign animated value");
+  if (aValue.mType == nsSMILFloatType::Singleton()) {
+    mVal->SetAnimValue(float(aValue.mU.mDouble), mSVGElement);
+  }
+  return NS_OK;
+}