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+/*
+ * Copyright 2011 Google Inc. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef TYPOGRAPHY_FONT_SFNTLY_SRC_SAMPLE_SUBTLY_FONT_INFO_H_
+#define TYPOGRAPHY_FONT_SFNTLY_SRC_SAMPLE_SUBTLY_FONT_INFO_H_
+
+#include <map>
+#include <set>
+
+#include "sfntly/font.h"
+#include "sfntly/port/type.h"
+#include "sfntly/port/refcount.h"
+#include "sfntly/table/core/cmap_table.h"
+#include "sfntly/table/truetype/glyph_table.h"
+#include "sfntly/table/truetype/loca_table.h"
+
+namespace subtly {
+class CharacterPredicate;
+
+typedef int32_t FontId;
+typedef std::map<FontId, sfntly::Ptr<sfntly::Font> > FontIdMap;
+
+// Glyph id pair that contains the loca table glyph id as well as the
+// font id that has the glyph table this glyph belongs to.
+class GlyphId {
+ public:
+  GlyphId(int32_t glyph_id, FontId font_id);
+  ~GlyphId() {}
+
+  bool operator==(const GlyphId& other) const;
+  bool operator<(const GlyphId& other) const;
+
+  int32_t glyph_id() const { return glyph_id_; }
+  void set_glyph_id(const int32_t glyph_id) { glyph_id_ = glyph_id; }
+  FontId font_id() const { return font_id_; }
+  void set_font_id(const FontId font_id) { font_id_ = font_id; }
+
+ private:
+  int32_t glyph_id_;
+  FontId font_id_;
+};
+
+typedef std::map<int32_t, GlyphId> CharacterMap;
+typedef std::set<GlyphId> GlyphIdSet;
+
+// Font information used for FontAssembler in the construction of a new font.
+// Will make copies of character map, glyph id set and font id map.
+class FontInfo : public sfntly::RefCounted<FontInfo> {
+ public:
+  // Empty FontInfo object.
+  FontInfo();
+  // chars_to_glyph_ids maps characters to GlyphIds for CMap construction
+  // resolved_glyph_ids defines GlyphIds which should be in the final font
+  // fonts is a map of font ids to fonts to reference any needed table
+  FontInfo(CharacterMap* chars_to_glyph_ids,
+           GlyphIdSet* resolved_glyph_ids,
+           FontIdMap* fonts);
+  virtual ~FontInfo();
+
+  // Gets the table with the specified tag from the font corresponding to
+  // font_id or NULL if there is no such font/table.
+  // font_id is the id of the font that contains the table
+  // tag identifies the table to be obtained
+  virtual sfntly::FontDataTable* GetTable(FontId font_id, int32_t tag);
+  // Gets the table map of the font whose id is font_id
+  virtual const sfntly::TableMap* GetTableMap(FontId);
+
+  CharacterMap* chars_to_glyph_ids() const { return chars_to_glyph_ids_; }
+  // Takes ownership of the chars_to_glyph_ids CharacterMap.
+  void set_chars_to_glyph_ids(CharacterMap* chars_to_glyph_ids);
+  GlyphIdSet* resolved_glyph_ids() const { return resolved_glyph_ids_; }
+  // Takes ownership of the glyph_ids GlyphIdSet.
+  void set_resolved_glyph_ids(GlyphIdSet* glyph_ids);
+  FontIdMap* fonts() const { return fonts_; }
+  // Takes ownership of the fonts FontIdMap.
+  void set_fonts(FontIdMap* fonts);
+
+ private:
+  CharacterMap* chars_to_glyph_ids_;
+  GlyphIdSet* resolved_glyph_ids_;
+  FontIdMap* fonts_;
+};
+
+// FontSourcedInfoBuilder is used to create a FontInfo object from a Font
+// optionally specifying a CharacterPredicate to filter out some of
+// the font's characters.
+// It does not take ownership or copy the values its constructor receives.
+class FontSourcedInfoBuilder :
+      public sfntly::RefCounted<FontSourcedInfoBuilder> {
+ public:
+  FontSourcedInfoBuilder(sfntly::Font* font, FontId font_id);
+  FontSourcedInfoBuilder(sfntly::Font* font,
+                         FontId font_id,
+                         CharacterPredicate* predicate);
+  virtual ~FontSourcedInfoBuilder() { }
+
+  virtual CALLER_ATTACH FontInfo* GetFontInfo();
+
+ protected:
+  bool GetCharacterMap(CharacterMap* chars_to_glyph_ids);
+  bool ResolveCompositeGlyphs(CharacterMap* chars_to_glyph_ids,
+                              GlyphIdSet* resolved_glyph_ids);
+  void Initialize();
+
+ private:
+  sfntly::Ptr<sfntly::Font> font_;
+  FontId font_id_;
+  CharacterPredicate* predicate_;
+
+  sfntly::Ptr<sfntly::CMapTable::CMap> cmap_;
+  sfntly::Ptr<sfntly::LocaTable> loca_table_;
+  sfntly::Ptr<sfntly::GlyphTable> glyph_table_;
+};
+}
+#endif  // TYPOGRAPHY_FONT_SFNTLY_SRC_SAMPLE_SUBTLY_FONT_INFO_H_