Add bin and edit workflow

bin/gems/ttfunk-1.8.0/lib/ttfunk/table/cmap.rb

@@ -0,0 +1,60 @@
+# frozen_string_literal: true
+
+module TTFunk
+  class Table
+    # Character to Glyph Index Mapping (`cmap`) table.
+    class Cmap < Table
+      # Table version.
+      # @return [Integer]
+      attr_reader :version
+
+      # Encoding tables.
+      # @return [Array<TTFunk::Table::Cmap::Subtable>]
+      attr_reader :tables
+
+      # Encode table.
+      #
+      # @param charmap [Hash{Integer => Integer}]
+      # @param encoding [Symbol]
+      # @return [Hash]
+      #   * `:charmap` (<tt>Hash{Integer => Hash}</tt>) keys are the characrers in
+      #     `charset`, values are hashes:
+      #     * `:old` (<tt>Integer</tt>) - glyph ID in the original font.
+      #     * `:new` (<tt>Integer</tt>) - glyph ID in the subset font.
+      #     that maps the characters in charmap to a
+      #   * `:table` (<tt>String</tt>) - serialized table.
+      #   * `:max_glyph_id` (<tt>Integer</tt>) - maximum glyph ID in the new font.
+      def self.encode(charmap, encoding)
+        result = Cmap::Subtable.encode(charmap, encoding)
+
+        # pack 'version' and 'table-count'
+        result[:table] = [0, 1, result.delete(:subtable)].pack('nnA*')
+        result
+      end
+
+      # Get Unicode encoding records.
+      #
+      # @return [Array<TTFunk::Table::Cmap::Subtable>]
+      def unicode
+        # Because most callers just call .first on the result, put tables with
+        # highest-number format first. Unsupported formats will be ignored.
+        @unicode ||=
+          @tables
+            .select { |table| table.unicode? && table.supported? }
+            .sort { |a, b| b.format <=> a.format }
+      end
+
+      private
+
+      def parse!
+        @version, table_count = read(4, 'nn')
+        @tables =
+          Array.new(table_count) do
+            Cmap::Subtable.new(file, offset)
+          end
+      end
+    end
+  end
+end
+
+require_relative 'cmap/subtable'