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# frozen_string_literal: true
##
# RDoc::Markup parses plain text documents and attempts to decompose them into
# their constituent parts. Some of these parts are high-level: paragraphs,
# chunks of verbatim text, list entries and the like. Other parts happen at
# the character level: a piece of bold text, a word in code font. This markup
# is similar in spirit to that used on WikiWiki webs, where folks create web
# pages using a simple set of formatting rules.
#
# RDoc::Markup and other markup formats do no output formatting, this is
# handled by the RDoc::Markup::Formatter subclasses.
#
# = Supported Formats
#
# Besides the RDoc::Markup format, the following formats are built in to RDoc:
#
# markdown::
# The markdown format as described by
# http://daringfireball.net/projects/markdown/. See RDoc::Markdown for
# details on the parser and supported extensions.
# rd::
# The rdtool format. See RDoc::RD for details on the parser and format.
# tomdoc::
# The TomDoc format as described by http://tomdoc.org/. See RDoc::TomDoc
# for details on the parser and supported extensions.
#
# You can choose a markup format using the following methods:
#
# per project::
# If you build your documentation with rake use RDoc::Task#markup.
#
# If you build your documentation by hand run:
#
# rdoc --markup your_favorite_format --write-options
#
# and commit <tt>.rdoc_options</tt> and ship it with your packaged gem.
# per file::
# At the top of the file use the <tt>:markup:</tt> directive to set the
# default format for the rest of the file.
# per comment::
# Use the <tt>:markup:</tt> directive at the top of a comment you want
# to write in a different format.
#
# = RDoc::Markup
#
# RDoc::Markup is extensible at runtime: you can add \new markup elements to
# be recognized in the documents that RDoc::Markup parses.
#
# RDoc::Markup is intended to be the basis for a family of tools which share
# the common requirement that simple, plain-text should be rendered in a
# variety of different output formats and media. It is envisaged that
# RDoc::Markup could be the basis for formatting RDoc style comment blocks,
# Wiki entries, and online FAQs.
#
# == Synopsis
#
# This code converts +input_string+ to HTML. The conversion takes place in
# the +convert+ method, so you can use the same RDoc::Markup converter to
# convert multiple input strings.
#
# require 'rdoc'
#
# h = RDoc::Markup::ToHtml.new(RDoc::Options.new)
#
# puts h.convert(input_string)
#
# You can extend the RDoc::Markup parser to recognize new markup
# sequences, and to add regexp handling. Here we make WikiWords significant to
# the parser, and also make the sequences {word} and \<no>text...</no> signify
# strike-through text. We then subclass the HTML output class to deal
# with these:
#
# require 'rdoc'
#
# class WikiHtml < RDoc::Markup::ToHtml
# def handle_regexp_WIKIWORD(target)
# "<font color=red>" + target.text + "</font>"
# end
# end
#
# markup = RDoc::Markup.new
# markup.add_word_pair("{", "}", :STRIKE)
# markup.add_html("no", :STRIKE)
#
# markup.add_regexp_handling(/\b([A-Z][a-z]+[A-Z]\w+)/, :WIKIWORD)
#
# wh = WikiHtml.new RDoc::Options.new, markup
# wh.add_tag(:STRIKE, "<strike>", "</strike>")
#
# puts "<body>#{wh.convert ARGF.read}</body>"
#
# == Encoding
#
# Where Encoding support is available, RDoc will automatically convert all
# documents to the same output encoding. The output encoding can be set via
# RDoc::Options#encoding and defaults to Encoding.default_external.
#
# = \RDoc Markup Reference
#
# See RDoc::MarkupReference.
#
#--
# Original Author:: Dave Thomas, dave@pragmaticprogrammer.com
# License:: Ruby license
class RDoc::Markup
##
# An AttributeManager which handles inline markup.
attr_reader :attribute_manager
##
# Parses +str+ into an RDoc::Markup::Document.
def self.parse str
RDoc::Markup::Parser.parse str
rescue RDoc::Markup::Parser::Error => e
$stderr.puts <<-EOF
While parsing markup, RDoc encountered a #{e.class}:
#{e}
\tfrom #{e.backtrace.join "\n\tfrom "}
---8<---
#{text}
---8<---
RDoc #{RDoc::VERSION}
Ruby #{RUBY_VERSION}-p#{RUBY_PATCHLEVEL} #{RUBY_RELEASE_DATE}
Please file a bug report with the above information at:
https://github.com/ruby/rdoc/issues
EOF
raise
end
##
# Take a block of text and use various heuristics to determine its
# structure (paragraphs, lists, and so on). Invoke an event handler as we
# identify significant chunks.
def initialize attribute_manager = nil
@attribute_manager = attribute_manager || RDoc::Markup::AttributeManager.new
@output = nil
end
##
# Add to the sequences used to add formatting to an individual word (such
# as *bold*). Matching entries will generate attributes that the output
# formatters can recognize by their +name+.
def add_word_pair(start, stop, name)
@attribute_manager.add_word_pair(start, stop, name)
end
##
# Add to the sequences recognized as general markup.
def add_html(tag, name)
@attribute_manager.add_html(tag, name)
end
##
# Add to other inline sequences. For example, we could add WikiWords using
# something like:
#
# parser.add_regexp_handling(/\b([A-Z][a-z]+[A-Z]\w+)/, :WIKIWORD)
#
# Each wiki word will be presented to the output formatter.
def add_regexp_handling(pattern, name)
@attribute_manager.add_regexp_handling(pattern, name)
end
##
# We take +input+, parse it if necessary, then invoke the output +formatter+
# using a Visitor to render the result.
def convert input, formatter
document = case input
when RDoc::Markup::Document then
input
else
RDoc::Markup::Parser.parse input
end
document.accept formatter
end
autoload :Parser, "#{__dir__}/markup/parser"
autoload :PreProcess, "#{__dir__}/markup/pre_process"
# Inline markup classes
autoload :AttrChanger, "#{__dir__}/markup/attr_changer"
autoload :AttrSpan, "#{__dir__}/markup/attr_span"
autoload :Attributes, "#{__dir__}/markup/attributes"
autoload :AttributeManager, "#{__dir__}/markup/attribute_manager"
autoload :RegexpHandling, "#{__dir__}/markup/regexp_handling"
# RDoc::Markup AST
autoload :BlankLine, "#{__dir__}/markup/blank_line"
autoload :BlockQuote, "#{__dir__}/markup/block_quote"
autoload :Document, "#{__dir__}/markup/document"
autoload :HardBreak, "#{__dir__}/markup/hard_break"
autoload :Heading, "#{__dir__}/markup/heading"
autoload :Include, "#{__dir__}/markup/include"
autoload :IndentedParagraph, "#{__dir__}/markup/indented_paragraph"
autoload :List, "#{__dir__}/markup/list"
autoload :ListItem, "#{__dir__}/markup/list_item"
autoload :Paragraph, "#{__dir__}/markup/paragraph"
autoload :Table, "#{__dir__}/markup/table"
autoload :Raw, "#{__dir__}/markup/raw"
autoload :Rule, "#{__dir__}/markup/rule"
autoload :Verbatim, "#{__dir__}/markup/verbatim"
# Formatters
autoload :Formatter, "#{__dir__}/markup/formatter"
autoload :ToAnsi, "#{__dir__}/markup/to_ansi"
autoload :ToBs, "#{__dir__}/markup/to_bs"
autoload :ToHtml, "#{__dir__}/markup/to_html"
autoload :ToHtmlCrossref, "#{__dir__}/markup/to_html_crossref"
autoload :ToHtmlSnippet, "#{__dir__}/markup/to_html_snippet"
autoload :ToLabel, "#{__dir__}/markup/to_label"
autoload :ToMarkdown, "#{__dir__}/markup/to_markdown"
autoload :ToRdoc, "#{__dir__}/markup/to_rdoc"
autoload :ToTableOfContents, "#{__dir__}/markup/to_table_of_contents"
autoload :ToTest, "#{__dir__}/markup/to_test"
autoload :ToTtOnly, "#{__dir__}/markup/to_tt_only"
end