Parent

Prawn::Font::AFM

Constants

BUILT_INS

Public Class Methods

metrics_path() click to toggle source
# File lib/prawn/font/afm.rb, line 22
def self.metrics_path
  if m = ENV['METRICS']
    @metrics_path ||= m.split(':')
  else
    @metrics_path ||= [
      ".", "/usr/lib/afm",
      "/usr/local/lib/afm",
      "/usr/openwin/lib/fonts/afm/",
       Prawn::BASEDIR+'/data/fonts/']
  end
end

Public Instance Methods

bbox() click to toggle source

The font bbox, as an array of integers

# File lib/prawn/font/afm.rb, line 61
def bbox
  @bbox ||= @attributes['fontbbox'].split(/\s+/).map { |e| Integer(e) }
end
character_count(str) click to toggle source

Returns the number of characters in str (a WinAnsi-encoded string).

# File lib/prawn/font/afm.rb, line 98
def character_count(str)
  str.length
end
encode_text(text, options={}) click to toggle source

Perform any changes to the string that need to happen before it is rendered to the canvas. Returns an array of subset “chunks”, where each chunk is an array of two elements. The first element is the font subset number, and the second is either a string or an array (for kerned text).

For Adobe fonts, there is only ever a single subset, so the first element of the array is “0”, and the second is the string itself (or an array, if kerning is performed).

The text parameter must be in WinAnsi encoding (cp1252).

# File lib/prawn/font/afm.rb, line 114
def encode_text(text, options={})
  [[0, options[:kerning] ? kern(text) : text]]
end
glyph_present?(char) click to toggle source
# File lib/prawn/font/afm.rb, line 118
def glyph_present?(char)
  if char == "_"
    true
  else
    normalize_encoding(char) != "_"
  end
end
has_kerning_data?() click to toggle source

Returns true if the font has kerning data, false otherwise

# File lib/prawn/font/afm.rb, line 80
def has_kerning_data?
  @kern_pairs.any?
end
normalize_encoding(text) click to toggle source

built-in fonts only work with winansi encoding, so translate the string. Changes the encoding in-place, so the argument itself is replaced with a string in WinAnsi encoding.

# File lib/prawn/font/afm.rb, line 88
def normalize_encoding(text)
  enc = Prawn::Encoding::WinAnsi.new
  text.unpack("U*").collect { |i| enc[i] }.pack("C*")
rescue ArgumentError
  raise Prawn::Errors::IncompatibleStringEncoding,
    "Arguments to text methods must be UTF-8 encoded"
end
unicode?() click to toggle source
# File lib/prawn/font/afm.rb, line 18
def unicode?
  false
end

[Validate]

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