1 files changed, 122 insertions, 0 deletions
diff --git a/layout/style/nsCSSValue.cpp b/layout/style/nsCSSValue.cpp
new file mode 100644
index 0000000000..5d815c25f2
--- /dev/null
+++ b/layout/style/nsCSSValue.cpp
@@ -0,0 +1,122 @@
+/* -*- 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(float aValue, nsCSSUnit aUnit) : mUnit(aUnit) {
+  MOZ_ASSERT(eCSSUnit_Null == aUnit, "not a float value");
+  mValue = aValue;
+  MOZ_ASSERT(!std::isnan(mValue));
+}
+
+nsCSSValue::nsCSSValue(const nsCSSValue& aCopy) : mUnit(aCopy.mUnit) {
+  if (eCSSUnit_Null != mUnit) {
+    mValue = aCopy.mValue;
+    MOZ_ASSERT(!std::isnan(mValue));
+  } 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;
+  }
+  return mValue == aOther.mValue;
+}
+
+nscoord nsCSSValue::GetPixelLength() const {
+  MOZ_ASSERT(IsPixelLengthUnit(), "not a fixed length unit");
+
+  double scaleFactor;
+  switch (mUnit) {
+    case eCSSUnit_Pixel:
+      return nsPresContext::CSSPixelsToAppUnits(mValue);
+    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 * scaleFactor));
+}
+
+void nsCSSValue::SetPercentValue(float aValue) {
+  Reset();
+  mUnit = eCSSUnit_Percent;
+  mValue = aValue;
+  MOZ_ASSERT(!std::isnan(mValue));
+}
+
+void nsCSSValue::SetFloatValue(float aValue, nsCSSUnit aUnit) {
+  MOZ_ASSERT(IsFloatUnit(aUnit), "not a float value");
+  Reset();
+  if (IsFloatUnit(aUnit)) {
+    mUnit = aUnit;
+    mValue = aValue;
+    MOZ_ASSERT(!std::isnan(mValue));
+  }
+}