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authorJari Vetoniemi <jari.vetoniemi@indooratlas.com>2020-03-16 18:49:26 +0900
committerJari Vetoniemi <jari.vetoniemi@indooratlas.com>2020-03-30 00:39:06 +0900
commitfcbf63e62c627deae76c1b8cb8c0876c536ed811 (patch)
tree64cb17de3f41a2b6fef2368028fbd00349946994 /jni/ruby/lib/rdoc/markup/to_markdown.rb
Fresh start
Diffstat (limited to 'jni/ruby/lib/rdoc/markup/to_markdown.rb')
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diff --git a/jni/ruby/lib/rdoc/markup/to_markdown.rb b/jni/ruby/lib/rdoc/markup/to_markdown.rb
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+# :markup: markdown
+
+##
+# Outputs parsed markup as Markdown
+
+class RDoc::Markup::ToMarkdown < RDoc::Markup::ToRdoc
+
+ ##
+ # Creates a new formatter that will output Markdown format text
+
+ def initialize markup = nil
+ super
+
+ @headings[1] = ['# ', '']
+ @headings[2] = ['## ', '']
+ @headings[3] = ['### ', '']
+ @headings[4] = ['#### ', '']
+ @headings[5] = ['##### ', '']
+ @headings[6] = ['###### ', '']
+
+ add_special_RDOCLINK
+ add_special_TIDYLINK
+
+ @hard_break = " \n"
+ end
+
+ ##
+ # Maps attributes to HTML sequences
+
+ def init_tags
+ add_tag :BOLD, '**', '**'
+ add_tag :EM, '*', '*'
+ add_tag :TT, '`', '`'
+ end
+
+ ##
+ # Adds a newline to the output
+
+ def handle_special_HARD_BREAK special
+ " \n"
+ end
+
+ ##
+ # Finishes consumption of `list`
+
+ def accept_list_end list
+ @res << "\n"
+
+ super
+ end
+
+ ##
+ # Finishes consumption of `list_item`
+
+ def accept_list_item_end list_item
+ width = case @list_type.last
+ when :BULLET then
+ 4
+ when :NOTE, :LABEL then
+ use_prefix
+
+ 4
+ else
+ @list_index[-1] = @list_index.last.succ
+ 4
+ end
+
+ @indent -= width
+ end
+
+ ##
+ # Prepares the visitor for consuming `list_item`
+
+ def accept_list_item_start list_item
+ type = @list_type.last
+
+ case type
+ when :NOTE, :LABEL then
+ bullets = Array(list_item.label).map do |label|
+ attributes(label).strip
+ end.join "\n"
+
+ bullets << "\n:"
+
+ @prefix = ' ' * @indent
+ @indent += 4
+ @prefix << bullets + (' ' * (@indent - 1))
+ else
+ bullet = type == :BULLET ? '*' : @list_index.last.to_s + '.'
+ @prefix = (' ' * @indent) + bullet.ljust(4)
+
+ @indent += 4
+ end
+ end
+
+ ##
+ # Prepares the visitor for consuming `list`
+
+ def accept_list_start list
+ case list.type
+ when :BULLET, :LABEL, :NOTE then
+ @list_index << nil
+ when :LALPHA, :NUMBER, :UALPHA then
+ @list_index << 1
+ else
+ raise RDoc::Error, "invalid list type #{list.type}"
+ end
+
+ @list_width << 4
+ @list_type << list.type
+ end
+
+ ##
+ # Adds `rule` to the output
+
+ def accept_rule rule
+ use_prefix or @res << ' ' * @indent
+ @res << '-' * 3
+ @res << "\n"
+ end
+
+ ##
+ # Outputs `verbatim` indented 4 columns
+
+ def accept_verbatim verbatim
+ indent = ' ' * (@indent + 4)
+
+ verbatim.parts.each do |part|
+ @res << indent unless part == "\n"
+ @res << part
+ end
+
+ @res << "\n" unless @res =~ /\n\z/
+ end
+
+ ##
+ # Creates a Markdown-style URL from +url+ with +text+.
+
+ def gen_url url, text
+ scheme, url, = parse_url url
+
+ "[#{text.sub(%r{^#{scheme}:/*}i, '')}](#{url})"
+ end
+
+ ##
+ # Handles <tt>rdoc-</tt> type links for footnotes.
+
+ def handle_rdoc_link url
+ case url
+ when /^rdoc-ref:/ then
+ $'
+ when /^rdoc-label:footmark-(\d+)/ then
+ "[^#{$1}]:"
+ when /^rdoc-label:foottext-(\d+)/ then
+ "[^#{$1}]"
+ when /^rdoc-label:label-/ then
+ gen_url url, $'
+ when /^rdoc-image:/ then
+ "![](#{$'})"
+ when /^rdoc-[a-z]+:/ then
+ $'
+ end
+ end
+
+ ##
+ # Converts the RDoc markup tidylink into a Markdown.style link.
+
+ def handle_special_TIDYLINK special
+ text = special.text
+
+ return text unless text =~ /\{(.*?)\}\[(.*?)\]/ or text =~ /(\S+)\[(.*?)\]/
+
+ label = $1
+ url = $2
+
+ if url =~ /^rdoc-label:foot/ then
+ handle_rdoc_link url
+ else
+ gen_url url, label
+ end
+ end
+
+ ##
+ # Converts the rdoc-...: links into a Markdown.style links.
+
+ def handle_special_RDOCLINK special
+ handle_rdoc_link special.text
+ end
+
+end
+