2 files changed, 177 insertions, 0 deletions
diff --git a/include/vcl/font/Feature.hxx b/include/vcl/font/Feature.hxx
new file mode 100644
index 0000000000..0c3c159dbc
--- /dev/null
+++ b/include/vcl/font/Feature.hxx
@@ -0,0 +1,129 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * 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/.
+ */
+
+#ifndef INCLUDED_VCL_FONT_FEATURE_HXX
+#define INCLUDED_VCL_FONT_FEATURE_HXX
+
+#include <vcl/dllapi.h>
+#include <rtl/character.hxx>
+#include <rtl/ustring.hxx>
+#include <unotools/resmgr.hxx>
+#include <vector>
+
+namespace vcl::font
+{
+constexpr uint32_t featureCode(const char sFeature[4])
+{
+    return static_cast<uint32_t>(sFeature[0]) << 24U | static_cast<uint32_t>(sFeature[1]) << 16U
+           | static_cast<uint32_t>(sFeature[2]) << 8U | static_cast<uint32_t>(sFeature[3]);
+}
+
+VCL_DLLPUBLIC OUString featureCodeAsString(uint32_t nFeature);
+
+enum class FeatureParameterType
+{
+    BOOL,
+    ENUM
+};
+
+enum class FeatureType
+{
+    OpenType,
+    Graphite
+};
+
+struct VCL_DLLPUBLIC FeatureParameter
+{
+private:
+    uint32_t m_nCode;
+    OUString m_sDescription;
+    TranslateId m_pDescriptionID;
+
+public:
+    FeatureParameter(uint32_t nCode, OUString aDescription);
+    FeatureParameter(uint32_t nCode, TranslateId pDescriptionID);
+
+    uint32_t getCode() const;
+    OUString getDescription() const;
+};
+
+class VCL_DLLPUBLIC FeatureDefinition
+{
+private:
+    OUString m_sDescription;
+    TranslateId m_pDescriptionID;
+    OUString m_sNumericPart;
+    uint32_t m_nCode;
+    int32_t m_nDefault;
+    FeatureParameterType m_eType;
+    // the index of the parameter defines the enum value, string is the description
+    std::vector<FeatureParameter> m_aEnumParameters;
+
+public:
+    FeatureDefinition();
+    FeatureDefinition(uint32_t nCode, OUString aDescription,
+                      FeatureParameterType eType = FeatureParameterType::BOOL,
+                      std::vector<FeatureParameter>&& rEnumParameters
+                      = std::vector<FeatureParameter>{},
+                      int32_t nDefault = -1);
+    FeatureDefinition(uint32_t nCode, TranslateId pDescriptionID,
+                      OUString aNumericPart = OUString());
+    FeatureDefinition(uint32_t nCode, TranslateId pDescriptionID,
+                      std::vector<FeatureParameter> aEnumParameters);
+
+    const std::vector<FeatureParameter>& getEnumParameters() const;
+    uint32_t getCode() const;
+    OUString getDescription() const;
+    FeatureParameterType getType() const;
+    int32_t getDefault() const;
+
+    operator bool() const;
+};
+
+struct Feature
+{
+    Feature();
+    Feature(uint32_t const nCode, FeatureType eType);
+
+    bool isCharacterVariant() const
+    {
+        return ((m_nCode >> 24) & 0xFF) == 'c' && ((m_nCode >> 16) & 0xFF) == 'v'
+               && rtl::isAsciiDigit((m_nCode >> 8) & 0xFF)
+               && rtl::isAsciiDigit((m_nCode >> 0) & 0xFF);
+    }
+
+    bool isStylisticSet() const
+    {
+        return ((m_nCode >> 24) & 0xFF) == 's' && ((m_nCode >> 16) & 0xFF) == 's'
+               && rtl::isAsciiDigit((m_nCode >> 8) & 0xFF)
+               && rtl::isAsciiDigit((m_nCode >> 0) & 0xFF);
+    }
+
+    uint32_t m_nCode;
+    FeatureType m_eType;
+    FeatureDefinition m_aDefinition;
+};
+
+// This is basically duplicates hb_feature_t to avoid including HarfBuzz
+// headers here, so the member types should remain compatible.
+struct FeatureSetting
+{
+    FeatureSetting(OString feature);
+
+    uint32_t m_nTag;
+    uint32_t m_nValue;
+    unsigned int m_nStart;
+    unsigned int m_nEnd;
+};
+
+} // namespace vcl::font
+
+#endif // INCLUDED_VCL_FONT_FEATURE_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/vcl/font/FeatureParser.hxx b/include/vcl/font/FeatureParser.hxx
new file mode 100644
index 0000000000..d69baf0e7a
--- /dev/null
+++ b/include/vcl/font/FeatureParser.hxx
@@ -0,0 +1,48 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * 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/.
+ */
+
+#ifndef INCLUDED_VCL_FONT_FEATUREPASER_HXX
+#define INCLUDED_VCL_FONT_FEATUREPASER_HXX
+
+#include <vcl/dllapi.h>
+#include <rtl/ustring.hxx>
+#include <vector>
+#include <unordered_map>
+
+#include <vcl/font/Feature.hxx>
+
+namespace vcl::font
+{
+// These must not conflict with font name lists which use ; and ,
+constexpr const char FeaturePrefix = ':';
+constexpr const char FeatureSeparator = '&';
+
+VCL_DLLPUBLIC OUString trimFontNameFeatures(OUString const& rFontName);
+
+class VCL_DLLPUBLIC FeatureParser
+{
+private:
+    OUString m_sLanguage;
+    std::vector<FeatureSetting> m_aFeatures;
+
+public:
+    FeatureParser(std::u16string_view sFontName);
+
+    OUString const& getLanguage() const { return m_sLanguage; }
+
+    std::vector<FeatureSetting> const& getFeatures() const { return m_aFeatures; }
+
+    std::unordered_map<uint32_t, int32_t> getFeaturesMap() const;
+};
+
+} // namespace vcl::font
+
+#endif // INCLUDED_VCL_FONT_FEATUREPASER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */