Class: Ucode::Glyphs::Sources::Pillar3LastResort

Inherits:
Ucode::Glyphs::Source show all
Defined in:
lib/ucode/glyphs/sources/pillar3_last_resort.rb

Overview

Pillar 3 glyph source: Last Resort UFO placeholder outlines.

Wraps LastResort::Renderer, which chains cmap → contents → glif → svg for every codepoint the Last Resort Font's Format 13 cmap maps (essentially all of Unicode 0x0..0x10FFFF). This is the catch-all tier: any codepoint no higher tier produced a glyph for lands here and gets a placeholder outline.

The Renderer returns nil only for codepoints outside the cmap (extremely rare — the Format 13 cmap is exhaustive). For everything else it returns a LastResort::Renderer::Result with the SVG. We adapt that to Ucode::Glyphs::Source::Result.

Instance Method Summary collapse

Constructor Details

#initialize(renderer:) ⇒ Pillar3LastResort

Returns a new instance of Pillar3LastResort.

Parameters:



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# File 'lib/ucode/glyphs/sources/pillar3_last_resort.rb', line 25

def initialize(renderer:)
  super()
  @renderer = renderer
end

Instance Method Details

#fetch(codepoint) ⇒ Result?

Returns nil when this source cannot produce a glyph.

Parameters:

  • codepoint (Integer)

Returns:

  • (Result, nil) —

    nil when this source cannot produce a glyph



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# File 'lib/ucode/glyphs/sources/pillar3_last_resort.rb', line 41

def fetch(codepoint)
  result = @renderer.render(codepoint)
  return nil unless result&.ok?

  Result.new(tier: tier, codepoint: codepoint,
             svg: result.svg, provenance: provenance)
end

#provenance ⇒ String

Returns "pillar-3:last-resort".

Returns:

  • (String) —

    "pillar-3:last-resort"



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# File 'lib/ucode/glyphs/sources/pillar3_last_resort.rb', line 36

def provenance
  "pillar-3:last-resort"
end

#tier ⇒ Symbol

Returns :pillar3.

Returns:

  • (Symbol) —

    :pillar3



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# File 'lib/ucode/glyphs/sources/pillar3_last_resort.rb', line 31

def tier
  :pillar3
end