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module CodeRay
module Encoders
# Makes a statistic for the given tokens.
class Statistic < Encoder
include Streamable
register_for :stats, :statistic
attr_reader :type_stats, :real_token_count
protected
TypeStats = Struct.new :count, :size
def setup options
@type_stats = Hash.new { |h, k| h[k] = TypeStats.new 0, 0 }
@real_token_count = 0
end
def generate tokens, options
@tokens = tokens
super
end
def text_token text, kind
@real_token_count += 1 unless kind == :space
@type_stats[kind].count += 1
@type_stats[kind].size += text.size
@type_stats['TOTAL'].size += text.size
end
# TODO Hierarchy handling
def block_token action, kind
#@content_type = kind
@type_stats['open/close'].count += 1
end
def token text, kind
super
@type_stats['TOTAL'].count += 1
end
STATS = <<-STATS
Code Statistics
Tokens %8d
Non-Whitespace %8d
Bytes Total %8d
Token Types (%d):
type count ratio size (average)
-------------------------------------------------------------
%s
STATS
# space 12007 33.81 % 1.7
TOKEN_TYPES_ROW = <<-TKR
%-20s %8d %6.2f %% %5.1f
TKR
def finish options
all = @type_stats['TOTAL']
all_count, all_size = all.count, all.size
@type_stats.each do |type, stat|
stat.size /= stat.count.to_f
end
types_stats = @type_stats.sort_by { |k, v| [-v.count, k.to_s] }.map do |k, v|
TOKEN_TYPES_ROW % [k, v.count, 100.0 * v.count / all_count, v.size]
end.join
STATS % [
all_count, @real_token_count, all_size,
@type_stats.delete_if { |k, v| k.is_a? String }.size,
types_stats
]
end
end
end
end
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