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Versions: 10
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Contents
# -*- coding: utf-8 -*- #
module Rouge
# A Formatter takes a token stream and formats it for human viewing.
class Formatter
# @private
REGISTRY = {}
# Specify or get the unique tag for this formatter. This is used
# for specifying a formatter in `rougify`.
def self.tag(tag=nil)
return @tag unless tag
REGISTRY[tag] = self
@tag = tag
end
# Find a formatter class given a unique tag.
def self.find(tag)
REGISTRY[tag]
end
# Format a token stream. Delegates to {#format}.
def self.format(tokens, *a, &b)
new(*a).format(tokens, &b)
end
def initialize(opts={})
# pass
end
# Format a token stream.
def format(tokens, &b)
return stream(tokens, &b) if block_given?
out = ''
stream(tokens) { |piece| out << piece }
out
end
# @deprecated Use {#format} instead.
def render(tokens)
warn 'Formatter#render is deprecated, use #format instead.'
format(tokens)
end
# @abstract
# yield strings that, when concatenated, form the formatted output
def stream(tokens, &b)
raise 'abstract'
end
protected
def token_lines(tokens, &b)
return enum_for(:token_lines, tokens) unless block_given?
out = []
tokens.each do |tok, val|
val.scan /\n|[^\n]+/ do |s|
if s == "\n"
yield out
out = []
else
out << [tok, s]
end
end
end
# for inputs not ending in a newline
yield out if out.any?
end
end
end
Version data entries
10 entries across 10 versions & 3 rubygems