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135 lines
4.0 KiB
135 lines
4.0 KiB
/*
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* Copyright 2016 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkSVGAttributeParser_DEFINED
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#define SkSVGAttributeParser_DEFINED
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#include <vector>
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#include "include/private/SkNoncopyable.h"
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#include "modules/svg/include/SkSVGTypes.h"
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#include "src/core/SkTLazy.h"
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class SkSVGAttributeParser : public SkNoncopyable {
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public:
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SkSVGAttributeParser(const char[]);
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bool parseInteger(SkSVGIntegerType*);
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bool parseViewBox(SkSVGViewBoxType*);
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bool parsePreserveAspectRatio(SkSVGPreserveAspectRatio*);
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// TODO: Migrate all parse*() functions to this style (and delete the old version)
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// so they can be used by parse<T>():
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bool parse(SkSVGIntegerType* v) { return parseInteger(v); }
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template <typename T> using ParseResult = SkTLazy<T>;
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template <typename T> static ParseResult<T> parse(const char* value) {
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ParseResult<T> result;
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T parsedValue;
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if (SkSVGAttributeParser(value).parse(&parsedValue)) {
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result.set(std::move(parsedValue));
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}
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return result;
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}
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template <typename T>
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static ParseResult<T> parse(const char* expectedName,
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const char* name,
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const char* value) {
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if (!strcmp(name, expectedName)) {
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return parse<T>(value);
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}
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return ParseResult<T>();
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}
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template <typename PropertyT>
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static ParseResult<PropertyT> parseProperty(const char* expectedName,
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const char* name,
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const char* value) {
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if (strcmp(name, expectedName) != 0) {
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return ParseResult<PropertyT>();
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}
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if (!strcmp(value, "inherit")) {
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PropertyT result(SkSVGPropertyState::kInherit);
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return ParseResult<PropertyT>(&result);
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}
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auto pr = parse<typename PropertyT::ValueT>(value);
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if (pr.isValid()) {
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PropertyT result(*pr);
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return ParseResult<PropertyT>(&result);
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}
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return ParseResult<PropertyT>();
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}
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private:
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// Stack-only
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void* operator new(size_t) = delete;
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void* operator new(size_t, void*) = delete;
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template <typename T>
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bool parse(T*);
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template <typename F>
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bool advanceWhile(F func);
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bool matchStringToken(const char* token, const char** newPos = nullptr) const;
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bool parseWSToken();
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bool parseEOSToken();
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bool parseSepToken();
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bool parseCommaWspToken();
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bool parseExpectedStringToken(const char*);
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bool parseScalarToken(SkScalar*);
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bool parseInt32Token(int32_t*);
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bool parseHexToken(uint32_t*);
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bool parseLengthUnitToken(SkSVGLength::Unit*);
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bool parseNamedColorToken(SkColor*);
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bool parseHexColorToken(SkColor*);
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bool parseColorComponentToken(int32_t*);
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bool parseRGBColorToken(SkColor*);
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bool parseFuncIRI(SkSVGFuncIRI*);
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// Transform helpers
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bool parseMatrixToken(SkMatrix*);
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bool parseTranslateToken(SkMatrix*);
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bool parseScaleToken(SkMatrix*);
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bool parseRotateToken(SkMatrix*);
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bool parseSkewXToken(SkMatrix*);
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bool parseSkewYToken(SkMatrix*);
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// Parses a sequence of 'WS* <prefix> WS* (<nested>)', where the nested sequence
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// is handled by the passed functor.
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template <typename Func, typename T>
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bool parseParenthesized(const char* prefix, Func, T* result);
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template <typename T>
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bool parseList(std::vector<T>*);
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template <typename T, typename TArray>
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bool parseEnumMap(const TArray& arr, T* result) {
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for (size_t i = 0; i < SK_ARRAY_COUNT(arr); ++i) {
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if (this->parseExpectedStringToken(std::get<0>(arr[i]))) {
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*result = std::get<1>(arr[i]);
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return true;
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}
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}
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return false;
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}
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// The current position in the input string.
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const char* fCurPos;
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using INHERITED = SkNoncopyable;
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};
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#endif // SkSVGAttributeParser_DEFINED
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