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