forked from mirrors/gecko-dev
122 lines
3.2 KiB
C++
122 lines
3.2 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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/* representation of simple property values within CSS declarations */
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#include "nsCSSValue.h"
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#include "mozilla/CORSMode.h"
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#include "mozilla/FontPropertyTypes.h"
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#include "mozilla/ServoBindings.h"
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#include "mozilla/ServoStyleSet.h"
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#include "mozilla/ServoTypes.h"
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#include "mozilla/StyleSheetInlines.h"
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#include "mozilla/Likely.h"
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#include "mozilla/MemoryReporting.h"
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#include "mozilla/css/ImageLoader.h"
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#include "gfxFontConstants.h"
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#include "imgRequestProxy.h"
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#include "mozilla/dom/Document.h"
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#include "nsCSSProps.h"
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#include "nsNetUtil.h"
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#include "nsPresContext.h"
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#include "nsStyleUtil.h"
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#include "nsDeviceContext.h"
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#include "nsContentUtils.h"
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using namespace mozilla;
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using namespace mozilla::css;
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using namespace mozilla::dom;
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nsCSSValue::nsCSSValue(float aValue, nsCSSUnit aUnit) : mUnit(aUnit) {
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MOZ_ASSERT(eCSSUnit_Null == aUnit, "not a float value");
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mValue = aValue;
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MOZ_ASSERT(!std::isnan(mValue));
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}
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nsCSSValue::nsCSSValue(const nsCSSValue& aCopy) : mUnit(aCopy.mUnit) {
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if (eCSSUnit_Null != mUnit) {
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mValue = aCopy.mValue;
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MOZ_ASSERT(!std::isnan(mValue));
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} else {
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MOZ_ASSERT_UNREACHABLE("unknown unit");
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}
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}
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nsCSSValue& nsCSSValue::operator=(const nsCSSValue& aCopy) {
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if (this != &aCopy) {
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this->~nsCSSValue();
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new (this) nsCSSValue(aCopy);
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}
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return *this;
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}
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nsCSSValue& nsCSSValue::operator=(nsCSSValue&& aOther) {
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MOZ_ASSERT(this != &aOther, "Self assigment with rvalue reference");
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Reset();
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mUnit = aOther.mUnit;
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mValue = aOther.mValue;
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aOther.mUnit = eCSSUnit_Null;
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return *this;
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}
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bool nsCSSValue::operator==(const nsCSSValue& aOther) const {
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if (mUnit != aOther.mUnit) {
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return false;
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}
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return mValue == aOther.mValue;
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}
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nscoord nsCSSValue::GetPixelLength() const {
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MOZ_ASSERT(IsPixelLengthUnit(), "not a fixed length unit");
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double scaleFactor;
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switch (mUnit) {
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case eCSSUnit_Pixel:
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return nsPresContext::CSSPixelsToAppUnits(mValue);
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case eCSSUnit_Pica:
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scaleFactor = 16.0;
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break;
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case eCSSUnit_Point:
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scaleFactor = 4 / 3.0;
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break;
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case eCSSUnit_Inch:
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scaleFactor = 96.0;
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break;
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case eCSSUnit_Millimeter:
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scaleFactor = 96 / 25.4;
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break;
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case eCSSUnit_Centimeter:
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scaleFactor = 96 / 2.54;
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break;
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case eCSSUnit_Quarter:
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scaleFactor = 96 / 101.6;
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break;
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default:
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NS_ERROR("should never get here");
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return 0;
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}
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return nsPresContext::CSSPixelsToAppUnits(float(mValue * scaleFactor));
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}
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void nsCSSValue::SetPercentValue(float aValue) {
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Reset();
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mUnit = eCSSUnit_Percent;
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mValue = aValue;
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MOZ_ASSERT(!std::isnan(mValue));
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}
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void nsCSSValue::SetFloatValue(float aValue, nsCSSUnit aUnit) {
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MOZ_ASSERT(IsFloatUnit(aUnit), "not a float value");
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Reset();
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if (IsFloatUnit(aUnit)) {
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mUnit = aUnit;
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mValue = aValue;
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MOZ_ASSERT(!std::isnan(mValue));
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}
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}
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