@private
The font bbox, as an array of integers
# File lib/prawn/font/afm.rb, line 68 def bbox @bbox ||= @attributes['fontbbox'].split(/\s+/).map { |e| Integer(e) } end
Returns the number of characters in str (a WinAnsi-encoded string).
# File lib/prawn/font/afm.rb, line 105 def character_count(str) str.length end
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 121 def encode_text(text, options={}) [[0, options[:kerning] ? kern(text) : text]] end
# File lib/prawn/font/afm.rb, line 125 def glyph_present?(char) if char == "_" true else normalize_encoding(char) != "_" end end
Returns true if the font has kerning data, false otherwise
# File lib/prawn/font/afm.rb, line 87 def has_kerning_data? @kern_pairs.any? end
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 95 def normalize_encoding(text) enc = @@winansi 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
Generated with the Darkfish Rdoc Generator 2.