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# frozen_string_literal: true
# font_data.rb: Icon font metadata container/cache.
#
# Copyright October 2014, Jesse Doyle. All rights reserved.
#
# This is free software. Please see the LICENSE and COPYING files for details.
require 'yaml'
module Prawn
class Icon
class FontData
class << self
# Font data lazy-loader that will initialize
# icon fonts by document.
def load(document, set)
set = set.to_sym
@data ||= {}
@data[set] ||= FontData.new(document, set: set)
@data[set].load_fonts(document)
end
# Release all font references if requested.
def release_data
@data = {}
end
def unicode_from_key(document, key)
set = specifier_from_key(key)
key = key.sub(Regexp.new("#{set}-"), '')
load(document, set).unicode(key)
end
def specifier_from_key(key)
if key.nil? || key == ''
raise Errors::IconKeyEmpty,
'Icon key provided was nil.'
end
key.split('-')[0].to_sym
end
end
attr_reader :set
def initialize(document, opts = {})
@set = opts.fetch(:set)
load_fonts(document)
end
def font_version
yaml[specifier]['__font_version__']
end
def legend_path
File.join(File.dirname(path), "#{@set}.yml")
end
def load_fonts(document)
document.font_families[@set.to_s] ||= { normal: path }
self
end
def path
@path = begin
font = Icon.configuration.font_directory
.join(@set.to_s)
.glob('*.ttf')
.first
if font.nil?
raise Prawn::Errors::UnknownFont,
"Icon font not found for set: #{@set}"
end
font.to_s
end
end
def specifier
@specifier ||= yaml.keys[0]
end
def unicode(key)
yaml[specifier][key].tap do |char|
unless char
raise Errors::IconNotFound,
"Key: #{specifier}-#{key} not found"
end
end
end
def keys
# Strip the first element: __font_version__
yaml[specifier].keys.map { |k| "#{specifier}-#{k}" }.drop(1)
end
def yaml
@yaml ||= YAML.load_file legend_path
end
end
end
end
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