120 lines
3.2 KiB
Ruby
120 lines
3.2 KiB
Ruby
# frozen_string_literal: true
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##
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# A TokenStream is a list of tokens, gathered during the parse of some entity
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# (say a method). Entities populate these streams by being registered with the
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# lexer. Any class can collect tokens by including TokenStream. From the
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# outside, you use such an object by calling the start_collecting_tokens
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# method, followed by calls to add_token and pop_token.
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module RDoc::TokenStream
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##
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# Converts +token_stream+ to HTML wrapping various tokens with
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# <tt><span></tt> elements. Some tokens types are wrapped in spans
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# with the given class names. Other token types are not wrapped in spans.
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def self.to_html token_stream
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starting_title = false
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token_stream.map do |t|
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next unless t
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style = case t[:kind]
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when :on_const then 'ruby-constant'
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when :on_kw then 'ruby-keyword'
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when :on_ivar then 'ruby-ivar'
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when :on_cvar then 'ruby-identifier'
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when :on_gvar then 'ruby-identifier'
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when '=' != t[:text] && :on_op
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then 'ruby-operator'
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when :on_tlambda then 'ruby-operator'
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when :on_ident then 'ruby-identifier'
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when :on_label then 'ruby-value'
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when :on_backref, :on_dstring
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then 'ruby-node'
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when :on_comment then 'ruby-comment'
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when :on_embdoc then 'ruby-comment'
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when :on_regexp then 'ruby-regexp'
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when :on_tstring then 'ruby-string'
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when :on_int, :on_float,
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:on_rational, :on_imaginary,
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:on_heredoc,
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:on_symbol, :on_CHAR then 'ruby-value'
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when :on_heredoc_beg, :on_heredoc_end
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then 'ruby-identifier'
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end
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comment_with_nl = false
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if :on_comment == t[:kind] or :on_embdoc == t[:kind] or :on_heredoc_end == t[:kind]
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comment_with_nl = true if "\n" == t[:text][-1]
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text = t[:text].rstrip
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else
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text = t[:text]
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end
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if :on_ident == t[:kind] && starting_title
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starting_title = false
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style = 'ruby-identifier ruby-title'
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end
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if :on_kw == t[:kind] and 'def' == t[:text]
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starting_title = true
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end
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text = CGI.escapeHTML text
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if style then
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"<span class=\"#{style}\">#{text}</span>#{"\n" if comment_with_nl}"
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else
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text
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end
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end.join
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end
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##
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# Adds +tokens+ to the collected tokens
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def add_tokens(tokens)
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@token_stream.concat(tokens)
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end
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##
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# Adds one +token+ to the collected tokens
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def add_token(token)
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@token_stream.push(token)
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end
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##
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# Starts collecting tokens
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def collect_tokens
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@token_stream = []
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end
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alias start_collecting_tokens collect_tokens
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##
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# Remove the last token from the collected tokens
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def pop_token
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@token_stream.pop
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end
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##
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# Current token stream
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def token_stream
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@token_stream
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end
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##
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# Returns a string representation of the token stream
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def tokens_to_s
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token_stream.compact.map { |token| token[:text] }.join ''
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end
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end
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