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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/. */
+
+/* CSS parsing utility functions */
+
+#ifndef mozilla_ServoCSSParser_h
+#define mozilla_ServoCSSParser_h
+
+#include "mozilla/AlreadyAddRefed.h"
+#include "mozilla/gfx/Matrix.h"
+#include "mozilla/ServoTypes.h"
+#include "nsColor.h"
+#include "nsCSSPropertyID.h"
+#include "nsDOMCSSDeclaration.h"
+#include "nsStringFwd.h"
+
+struct nsCSSRect;
+template <class T>
+class RefPtr;
+
+namespace mozilla {
+
+class ServoStyleSet;
+struct URLExtraData;
+struct StyleFontFamilyList;
+struct StyleFontStretch;
+struct StyleFontWeight;
+struct StyleFontStyle;
+struct StyleLockedDeclarationBlock;
+union StyleComputedFontStyleDescriptor;
+
+template <typename Integer, typename Number, typename LinearStops>
+struct StyleTimingFunction;
+struct StylePiecewiseLinearFunction;
+using StyleComputedTimingFunction =
+ StyleTimingFunction<int32_t, float, StylePiecewiseLinearFunction>;
+
+namespace css {
+class Loader;
+}
+
+namespace dom {
+class Document;
+}
+
+class ServoCSSParser {
+ public:
+ using ParsingEnvironment = nsDOMCSSDeclaration::ParsingEnvironment;
+
+ /**
+ * Returns whether the specified string can be parsed as a valid CSS
+ * <color> value.
+ *
+ * This includes Mozilla-specific keywords such as -moz-default-color.
+ */
+ static bool IsValidCSSColor(const nsACString& aValue);
+
+ /**
+ * Computes an nscolor from the given CSS <color> value.
+ *
+ * @param aStyleSet The style set whose nsPresContext will be used to
+ * compute system colors and other special color values.
+ * @param aCurrentColor The color value that currentcolor should compute to.
+ * @param aValue The CSS <color> value.
+ * @param aResultColor The resulting computed color value.
+ * @param aWasCurrentColor Whether aValue was currentcolor. Can be nullptr
+ * if the caller doesn't care.
+ * @param aLoader The CSS loader for document we're parsing a color for,
+ * so that parse errors can be reported to the console. If nullptr, errors
+ * won't be reported to the console.
+ * @return Whether aValue was successfully parsed and aResultColor was set.
+ */
+ static bool ComputeColor(ServoStyleSet* aStyleSet, nscolor aCurrentColor,
+ const nsACString& aValue, nscolor* aResultColor,
+ bool* aWasCurrentColor = nullptr,
+ css::Loader* aLoader = nullptr);
+
+ /**
+ * Parse a string representing a CSS property value into a
+ * StyleLockedDeclarationBlock.
+ *
+ * @param aProperty The property to be parsed.
+ * @param aValue The specified value.
+ * @param aParsingEnvironment All the parsing environment data we need.
+ * @param aParsingMode The paring mode we apply.
+ * @return The parsed value as a StyleLockedDeclarationBlock. We put the value
+ * in a declaration block since that is how we represent specified values
+ * in Servo.
+ */
+ static already_AddRefed<StyleLockedDeclarationBlock> ParseProperty(
+ nsCSSPropertyID aProperty, const nsACString& aValue,
+ const ParsingEnvironment& aParsingEnvironment,
+ ParsingMode aParsingMode = ParsingMode::Default);
+
+ /**
+ * Parse a animation timing function.
+ *
+ * @param aValue The specified value.
+ * @param aResult The output timing function. (output)
+ * @return Whether the value was successfully parsed.
+ */
+ static bool ParseEasing(const nsACString& aValue,
+ StyleComputedTimingFunction& aResult);
+
+ /**
+ * Parse a specified transform list into a gfx matrix.
+ *
+ * @param aValue The specified value.
+ * @param aContains3DTransform The output flag indicates whether this is any
+ * 3d transform function. (output)
+ * @param aResult The output matrix. (output)
+ * @return Whether the value was successfully parsed.
+ */
+ static bool ParseTransformIntoMatrix(const nsACString& aValue,
+ bool& aContains3DTransform,
+ gfx::Matrix4x4& aResult);
+
+ /**
+ * Parse a font shorthand for FontFaceSet matching, so we only care about
+ * FontFamily, FontStyle, FontStretch, and FontWeight.
+ *
+ * @param aValue The specified value.
+ * @param aUrl The parser url extra data.
+ * @param aList The parsed FontFamily list. (output)
+ * @param aStyle The parsed FontStyle. (output)
+ * @param aStretch The parsed FontStretch. (output)
+ * @param aWeight The parsed FontWeight. (output)
+ * @param aSize If non-null, returns the parsed font size. (output)
+ * @return Whether the value was successfully parsed.
+ */
+ static bool ParseFontShorthandForMatching(
+ const nsACString& aValue, URLExtraData* aUrl, StyleFontFamilyList& aList,
+ StyleFontStyle& aStyle, StyleFontStretch& aStretch,
+ StyleFontWeight& aWeight, float* aSize = nullptr);
+
+ /**
+ * Get a URLExtraData from a document.
+ */
+ static already_AddRefed<URLExtraData> GetURLExtraData(dom::Document*);
+
+ /**
+ * Get a ParsingEnvironment from a document.
+ */
+ static ParsingEnvironment GetParsingEnvironment(dom::Document*);
+};
+
+} // namespace mozilla
+
+#endif // mozilla_ServoCSSParser_h