Class: Ucode::Glyphs::EmbeddedFonts::CodepointMapper::CorrelatorStrategy

Inherits:
Strategy
  • Object
show all
Defined in:
lib/ucode/glyphs/embedded_fonts/codepoint_mapper/correlator_strategy.rb

Overview

Strategy 2 — caller-supplied pillar-2 config. Renders the configured pages to SVG and runs Ucode::Glyphs::EmbeddedFonts::ContentStreamCorrelator to match specimen glyphs to hex labels positionally.

Instance Method Summary collapse

Constructor Details

#initialize(source:, correlator_configs:, mutool_draw:) ⇒ CorrelatorStrategy

Returns a new instance of CorrelatorStrategy.

Parameters:



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# File 'lib/ucode/glyphs/embedded_fonts/codepoint_mapper/correlator_strategy.rb', line 18

def initialize(source:, correlator_configs:, mutool_draw:)
  super()
  @source = source
  @correlator_configs = correlator_configs
  @mutool_draw = mutool_draw
end

Instance Method Details

#map(descriptor) ⇒ Object 



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# File 'lib/ucode/glyphs/embedded_fonts/codepoint_mapper/correlator_strategy.rb', line 35

def map(descriptor)
  config = @correlator_configs[descriptor.font_obj_id]
  return {} if config.page_numbers.nil? || config.page_numbers.empty?

  svg = @mutool_draw.svg(@source.pdf_to_s, *config.page_numbers)
  ContentStreamCorrelator.new(config).correlate(svg)
end

#positional? ⇒ Boolean

Returns:

  • (Boolean)

See Also:



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# File 'lib/ucode/glyphs/embedded_fonts/codepoint_mapper/correlator_strategy.rb', line 31

def positional?
  true
end

#supports?(descriptor) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ucode/glyphs/embedded_fonts/codepoint_mapper/correlator_strategy.rb', line 25

def supports?(descriptor)
  descriptor.cid_map_kind == :identity &&
    @correlator_configs.key?(descriptor.font_obj_id)
end