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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/. */
/* representation of simple property values within CSS declarations */
#include "nsCSSValue.h"
#include "mozilla/CORSMode.h"
#include "mozilla/FontPropertyTypes.h"
#include "mozilla/ServoBindings.h"
#include "mozilla/ServoStyleSet.h"
#include "mozilla/ServoTypes.h"
#include "mozilla/StyleSheetInlines.h"
#include "mozilla/Likely.h"
#include "mozilla/MemoryReporting.h"
#include "mozilla/css/ImageLoader.h"
#include "gfxFontConstants.h"
#include "imgRequestProxy.h"
#include "mozilla/dom/Document.h"
#include "nsCSSProps.h"
#include "nsNetUtil.h"
#include "nsPresContext.h"
#include "nsStyleUtil.h"
#include "nsDeviceContext.h"
#include "nsContentUtils.h"
using namespace mozilla;
using namespace mozilla::css;
using namespace mozilla::dom;
nsCSSValue::nsCSSValue(int32_t aValue, nsCSSUnit aUnit) : mUnit(aUnit) {
MOZ_ASSERT(aUnit == eCSSUnit_Integer || aUnit == eCSSUnit_Enumerated,
"not an int value");
if (aUnit == eCSSUnit_Integer || aUnit == eCSSUnit_Enumerated) {
mValue.mInt = aValue;
} else {
mUnit = eCSSUnit_Null;
mValue.mInt = 0;
}
}
nsCSSValue::nsCSSValue(float aValue, nsCSSUnit aUnit) : mUnit(aUnit) {
MOZ_ASSERT(eCSSUnit_Percent <= aUnit, "not a float value");
if (eCSSUnit_Percent <= aUnit) {
mValue.mFloat = aValue;
MOZ_ASSERT(!mozilla::IsNaN(mValue.mFloat));
} else {
mUnit = eCSSUnit_Null;
mValue.mInt = 0;
}
}
nsCSSValue::nsCSSValue(const nsCSSValue& aCopy) : mUnit(aCopy.mUnit) {
if (eCSSUnit_Percent <= mUnit) {
mValue.mFloat = aCopy.mValue.mFloat;
MOZ_ASSERT(!mozilla::IsNaN(mValue.mFloat));
} else if (eCSSUnit_Integer <= mUnit && mUnit <= eCSSUnit_Enumerated) {
mValue.mInt = aCopy.mValue.mInt;
} else {
MOZ_ASSERT_UNREACHABLE("unknown unit");
}
}
nsCSSValue& nsCSSValue::operator=(const nsCSSValue& aCopy) {
if (this != &aCopy) {
this->~nsCSSValue();
new (this) nsCSSValue(aCopy);
}
return *this;
}
nsCSSValue& nsCSSValue::operator=(nsCSSValue&& aOther) {
MOZ_ASSERT(this != &aOther, "Self assigment with rvalue reference");
Reset();
mUnit = aOther.mUnit;
mValue = aOther.mValue;
aOther.mUnit = eCSSUnit_Null;
return *this;
}
bool nsCSSValue::operator==(const nsCSSValue& aOther) const {
if (mUnit != aOther.mUnit) {
return false;
}
if ((eCSSUnit_Integer <= mUnit) && (mUnit <= eCSSUnit_Enumerated)) {
return mValue.mInt == aOther.mValue.mInt;
}
return mValue.mFloat == aOther.mValue.mFloat;
}
double nsCSSValue::GetAngleValueInDegrees() const {
// Note that this extends the value from float to double.
return GetAngleValue();
}
double nsCSSValue::GetAngleValueInRadians() const {
return GetAngleValueInDegrees() * M_PI / 180.0;
}
nscoord nsCSSValue::GetPixelLength() const {
MOZ_ASSERT(IsPixelLengthUnit(), "not a fixed length unit");
double scaleFactor;
switch (mUnit) {
case eCSSUnit_Pixel:
return nsPresContext::CSSPixelsToAppUnits(mValue.mFloat);
case eCSSUnit_Pica:
scaleFactor = 16.0;
break;
case eCSSUnit_Point:
scaleFactor = 4 / 3.0;
break;
case eCSSUnit_Inch:
scaleFactor = 96.0;
break;
case eCSSUnit_Millimeter:
scaleFactor = 96 / 25.4;
break;
case eCSSUnit_Centimeter:
scaleFactor = 96 / 2.54;
break;
case eCSSUnit_Quarter:
scaleFactor = 96 / 101.6;
break;
default:
NS_ERROR("should never get here");
return 0;
}
return nsPresContext::CSSPixelsToAppUnits(float(mValue.mFloat * scaleFactor));
}
void nsCSSValue::SetIntValue(int32_t aValue, nsCSSUnit aUnit) {
MOZ_ASSERT(aUnit == eCSSUnit_Integer || aUnit == eCSSUnit_Enumerated,
"not an int value");
Reset();
if (aUnit == eCSSUnit_Integer || aUnit == eCSSUnit_Enumerated) {
mUnit = aUnit;
mValue.mInt = aValue;
}
}
void nsCSSValue::SetPercentValue(float aValue) {
Reset();
mUnit = eCSSUnit_Percent;
mValue.mFloat = aValue;
MOZ_ASSERT(!mozilla::IsNaN(mValue.mFloat));
}
void nsCSSValue::SetFloatValue(float aValue, nsCSSUnit aUnit) {
MOZ_ASSERT(IsFloatUnit(aUnit), "not a float value");
Reset();
if (IsFloatUnit(aUnit)) {
mUnit = aUnit;
mValue.mFloat = aValue;
MOZ_ASSERT(!mozilla::IsNaN(mValue.mFloat));
}
}