TestFontDataProvider.h

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/*
 * Copyright 2023 Google LLC
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
 
#ifndef RasterTestData_DEFINED
#define RasterTestData_DEFINED
 
#include "include/core/SkString.h"
#include "src/utils/SkJSON.h"
 
#include <regex>
#include <string>
 
// Iterates over test data from the font tests CIPD, allows filtering for fonts and test samples
// languages using C++ regular expressions.
class TestFontDataProvider {
public:
    struct LangSample {
        SkString langTag;
        SkString sampleShort;
        SkString sampleLong;
    };
 
    struct TestSet {
        SkString fontName;
        SkString fontFilename;
        std::vector<LangSample> langSamples;
    };
 
    TestFontDataProvider(const std::string& fontFilterRegexp, const std::string& langFilterRegexp);
 
    bool next(TestSet* testSet);
 
    void rewind();
 
private:
    std::vector<LangSample> getLanguageSamples(const skjson::ArrayValue* languages);
    std::regex fFontFilter;
    std::regex fLangFilter;
    size_t fFontsIndex = 0;
    std::unique_ptr<skjson::DOM> fJsonDom;
    const skjson::ArrayValue* fFonts;
    const skjson::ObjectValue* fSamples;
};
 
namespace skiatest {
 
/**
 * Set font test data directory. Overrides the location of the extracted googlefonts_testdata CIPD
 * archive.
 */
void SetFontTestDataDirectory();
 
}  // namespace skiatest
 
#endif