Add bin and edit workflow

bin/gems/ttfunk-1.8.0/lib/ttfunk/subset/unicode.rb

@@ -0,0 +1,90 @@
+# frozen_string_literal: true
+
+require 'set'
+require_relative 'base'
+
+module TTFunk
+  module Subset
+    # Unicode-based subset.
+    class Unicode < Base
+      # Space character code
+      SPACE_CHAR = 0x20
+
+      # @param original [TTFunk::File]
+      def initialize(original)
+        super
+        @subset = Set.new
+        use(SPACE_CHAR)
+      end
+
+      # Is this a Unicode-based subset?
+      #
+      # @return [true]
+      def unicode?
+        true
+      end
+
+      # Get a mapping from this subset to Unicode.
+      #
+      # @return [Hash{Integer => Integer}]
+      def to_unicode_map
+        @subset.each_with_object({}) { |code, map| map[code] = code }
+      end
+
+      # Add a character to subset.
+      #
+      # @param character [Integer] Unicode codepoint
+      # @return [void]
+      def use(character)
+        @subset << character
+      end
+
+      # Can this subset include the character?
+      #
+      # @param _character [Integer] Unicode codepoint
+      # @return [true]
+      def covers?(_character)
+        true
+      end
+
+      # Does this subset actually has the character?
+      #
+      # @param character [Integer] Unicode codepoint
+      # @return [Boolean]
+      def includes?(character)
+        @subset.include?(character)
+      end
+
+      # Get character code for Unicode codepoint.
+      #
+      # @param character [Integer] Unicode codepoint
+      # @return [Integer]
+      def from_unicode(character)
+        character
+      end
+
+      # Get `cmap` table for this subset.
+      #
+      # @return [TTFunk::Table::Cmap]
+      def new_cmap_table
+        @new_cmap_table ||=
+          begin
+            mapping =
+              @subset.each_with_object({}) do |code, map|
+                map[code] = unicode_cmap[code]
+              end
+
+            TTFunk::Table::Cmap.encode(mapping, :unicode)
+          end
+      end
+
+      # Get the list of Glyph IDs from the original font that are in this
+      # subset.
+      #
+      # @return [Array<Integer>]
+      def original_glyph_ids
+        ([0] + @subset.map { |code| unicode_cmap[code] }).uniq.sort
+      end
+    end
+  end
+end