[Complex Text Layouts] Add third-party TextServer dependencies (ICU, HarfBuzz, Graphite).

thirdparty/graphite/src/inc/FeatureMap.h

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+/*  GRAPHITE2 LICENSING
+
+    Copyright 2010, SIL International
+    All rights reserved.
+
+    This library is free software; you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published
+    by the Free Software Foundation; either version 2.1 of License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should also have received a copy of the GNU Lesser General Public
+    License along with this library in the file named "LICENSE".
+    If not, write to the Free Software Foundation, 51 Franklin Street,
+    Suite 500, Boston, MA 02110-1335, USA or visit their web page on the
+    internet at http://www.fsf.org/licenses/lgpl.html.
+
+Alternatively, the contents of this file may be used under the terms of the
+Mozilla Public License (http://mozilla.org/MPL) or the GNU General Public
+License, as published by the Free Software Foundation, either version 2
+of the License or (at your option) any later version.
+*/
+#pragma once
+#include "inc/Main.h"
+#include "inc/FeatureVal.h"
+
+namespace graphite2 {
+
+// Forward declarations for implmentation types
+class FeatureMap;
+class Face;
+
+
+class FeatureSetting
+{
+public:
+    FeatureSetting(int16 theValue, uint16 labelId) : m_label(labelId), m_value(theValue) {};
+    uint16 label() const { return m_label; }
+    int16 value() const { return m_value; }
+
+    CLASS_NEW_DELETE;
+private:
+    FeatureSetting(const FeatureSetting & fs) : m_label(fs.m_label), m_value(fs.m_value) {};
+
+    uint16 m_label;
+    int16 m_value;
+};
+
+class FeatureRef
+{
+    typedef uint32      chunk_t;
+    static const uint8  SIZEOF_CHUNK = sizeof(chunk_t)*8;
+
+public:
+    enum flags_t : uint16 {
+        HIDDEN = 0x0800
+    };
+    FeatureRef() throw();
+    FeatureRef(const Face & face, unsigned short & bits_offset, uint32 max_val,
+               uint32 name, uint16 uiName, flags_t flags,
+               FeatureSetting *settings, uint16 num_set) throw();
+    ~FeatureRef() throw();
+
+    bool applyValToFeature(uint32 val, Features& pDest) const; //defined in GrFaceImp.h
+    void maskFeature(Features & pDest) const {
+    if (m_index < pDest.size())                 //defensive
+        pDest[m_index] |= m_mask;
+    }
+
+    uint32 getFeatureVal(const Features& feats) const; //defined in GrFaceImp.h
+
+    uint32 getId() const { return m_id; }
+    uint16 getNameId() const { return m_nameid; }
+    uint16 getNumSettings() const { return m_numSet; }
+    uint16 getSettingName(uint16 index) const { return m_nameValues[index].label(); }
+    int16  getSettingValue(uint16 index) const { return m_nameValues[index].value(); }
+    flags_t getFlags() const { return m_flags; }
+    uint32 maxVal() const { return m_max; }
+    const Face & getFace() const { assert(m_face); return *m_face;}
+    const FeatureMap* getFeatureMap() const;// { return m_pFace;}
+
+    CLASS_NEW_DELETE;
+private:
+    FeatureRef(const FeatureRef & rhs);
+
+    const Face     * m_face;
+    FeatureSetting * m_nameValues; // array of name table ids for feature values
+    chunk_t m_mask,             // bit mask to get the value from the vector
+            m_max;              // max value the value can take
+    uint32  m_id;               // feature identifier/name
+    uint16  m_nameid,           // Name table id for feature name
+            m_numSet;           // number of values (number of entries in m_nameValues)
+    flags_t m_flags;            // feature flags see FeatureRef::flags_t.
+    byte    m_bits,             // how many bits to shift the value into place
+            m_index;            // index into the array to find the ulong to mask
+
+private:        //unimplemented
+    FeatureRef& operator=(const FeatureRef&);
+};
+
+inline
+FeatureRef::FeatureRef() throw()
+: m_face(0),
+  m_nameValues(0),
+  m_mask(0), m_max(0),
+  m_id(0), m_nameid(0), m_numSet(0), 
+  m_flags(flags_t(0)),
+  m_bits(0), m_index(0)
+{
+}
+
+
+class NameAndFeatureRef
+{
+  public:
+    NameAndFeatureRef(uint32 name = 0) : m_name(name) , m_pFRef(NULL){}
+    NameAndFeatureRef(FeatureRef const & p) : m_name(p.getId()), m_pFRef(&p) {}
+
+    bool operator<(const NameAndFeatureRef& rhs) const //orders by m_name
+        {   return m_name<rhs.m_name; }
+
+    CLASS_NEW_DELETE
+
+    uint32 m_name;
+    const FeatureRef* m_pFRef;
+};
+
+class FeatureMap
+{
+public:
+    FeatureMap() : m_numFeats(0), m_feats(NULL), m_pNamedFeats(NULL) {}
+    ~FeatureMap() { delete[] m_feats; delete[] m_pNamedFeats; }
+
+    bool readFeats(const Face & face);
+    const FeatureRef *findFeatureRef(uint32 name) const;
+    FeatureRef *feature(uint16 index) const { return m_feats + index; }
+    //GrFeatureRef *featureRef(byte index) { return index < m_numFeats ? m_feats + index : NULL; }
+    const FeatureRef *featureRef(byte index) const { return index < m_numFeats ? m_feats + index : NULL; }
+    FeatureVal* cloneFeatures(uint32 langname/*0 means default*/) const;      //call destroy_Features when done.
+    uint16 numFeats() const { return m_numFeats; };
+    CLASS_NEW_DELETE
+private:
+friend class SillMap;
+    uint16 m_numFeats;
+
+    FeatureRef *m_feats;
+    NameAndFeatureRef* m_pNamedFeats;   //owned
+    FeatureVal m_defaultFeatures;        //owned
+
+private:        //defensive on m_feats, m_pNamedFeats, and m_defaultFeatures
+    FeatureMap(const FeatureMap&);
+    FeatureMap& operator=(const FeatureMap&);
+};
+
+
+class SillMap
+{
+private:
+    class LangFeaturePair
+    {
+        LangFeaturePair(const LangFeaturePair &);
+        LangFeaturePair & operator = (const LangFeaturePair &);
+
+    public:
+        LangFeaturePair() :  m_lang(0), m_pFeatures(0) {}
+        ~LangFeaturePair() { delete m_pFeatures; }
+
+        uint32 m_lang;
+        Features* m_pFeatures;      //owns
+        CLASS_NEW_DELETE
+    };
+public:
+    SillMap() : m_langFeats(NULL), m_numLanguages(0) {}
+    ~SillMap() { delete[] m_langFeats; }
+    bool readFace(const Face & face);
+    bool readSill(const Face & face);
+    FeatureVal* cloneFeatures(uint32 langname/*0 means default*/) const;      //call destroy_Features when done.
+    uint16 numLanguages() const { return m_numLanguages; };
+    uint32 getLangName(uint16 index) const { return (index < m_numLanguages)? m_langFeats[index].m_lang : 0; };
+
+    const FeatureMap & theFeatureMap() const { return m_FeatureMap; };
+private:
+    FeatureMap m_FeatureMap;        //of face
+    LangFeaturePair * m_langFeats;
+    uint16 m_numLanguages;
+
+private:        //defensive on m_langFeats
+    SillMap(const SillMap&);
+    SillMap& operator=(const SillMap&);
+};
+
+} // namespace graphite2
+
+struct gr_feature_ref : public graphite2::FeatureRef {};