Module: Fontisan::Stitcher::GlyphCloner

Defined in:
lib/fontisan/stitcher/glyph_cloner.rb

Overview

Deep-clone helper for UFO glyphs. Stateless — every call returns a fresh Ufo::Glyph with copied contours, components, anchors, and guidelines plus the original's width/height.

Extracted as a collaborator so GlyphCopier and CbdtPropagator share one implementation of the clone algorithm. Both previously defined identical clone_glyph / clone_contour private methods — a DRY violation that risked drifting apart as the glyph model gained fields.

Class Method Summary collapse

Class Method Details

.clone(original, name: nil) ⇒ Ufo::Glyph

Returns a fresh glyph with the original's geometry and metrics, sharing no mutable state with it.

Parameters:

  • original (Ufo::Glyph) —

    glyph to copy

  • name (String, nil) (defaults to: nil) —

    name for the copy; defaults to the original's name (used by callers that have already allocated a unique name via UniqueGlyphName).

Returns:

  • (Ufo::Glyph) —

    a fresh glyph with the original's geometry and metrics, sharing no mutable state with it.



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# File 'lib/fontisan/stitcher/glyph_cloner.rb', line 21

def self.clone(original, name: nil)
  copy = Ufo::Glyph.new(name: name || original.name)
  copy.width = original.width
  copy.height = original.height
  original.contours.each { |c| copy.add_contour(clone_contour(c)) }
  original.components.each { |c| copy.add_component(c) }
  original.anchors.each { |a| copy.add_anchor(a) }
  original.guidelines.each { |g| copy.add_guideline(g) }
  copy
end