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# frozen_string_literal: true ## # RDoc::CrossReference is a reusable way to create cross references for names. class RDoc::CrossReference ## # Regular expression to match class references # # 1. There can be a '\\' in front of text to suppress the cross-reference # 2. There can be a '::' in front of class names to reference from the # top-level namespace. # 3. The method can be followed by parenthesis (not recommended) CLASS_REGEXP_STR = '\\\\?((?:\:{2})?[A-Z]\w(?:\:\:\w+))' ## # Regular expression to match method references. # # See CLASS_REGEXP_STR METHOD_REGEXP_STR = '([a-z]\w[!?=]?\|%\|===\|\[\]=?\|<<\|>>\|-\|\+\|\)(?:$[\w.+/=<>-]$)?' ## # Regular expressions matching text that should potentially have # cross-reference links generated are passed to add_regexp_handling. Note # that these expressions are meant to pick up text for which cross-references # have been suppressed, since the suppression characters are removed by the # code that is triggered. CROSSREF_REGEXP = /(?:^\|[\s()]) ( (?: # A::B::C.meth #{CLASS_REGEXP_STR}(?:[.#]\|::)#{METHOD_REGEXP_STR} # Stand-alone method (preceded by a #) \| \\?\##{METHOD_REGEXP_STR} # Stand-alone method (preceded by ::) \| ::#{METHOD_REGEXP_STR} # A::B::C # The stuff after CLASS_REGEXP_STR is a # nasty hack. CLASS_REGEXP_STR unfortunately matches # words like dog and cat (these are legal "class" # names in Fortran 95). When a word is flagged as a # potential cross-reference, limitations in the markup # engine suppress other processing, such as typesetting. # This is particularly noticeable for contractions. # In order that words like "can't" not # be flagged as potential cross-references, only # flag potential class cross-references if the character # after the cross-reference is a space, sentence # punctuation, tag start character, or attribute # marker. \| #{CLASS_REGEXP_STR}(?=[@\s).?!,;<\000]\|\z) # Things that look like filenames # The key thing is that there must be at least # one special character (period, slash, or # underscore). \| (?:\.\.\/)[-\/\w]+[_\/.][-\w\/.]+ # Things that have markup suppressed # Don't process things like '\<' in \<tt>, though. # TODO: including < is a hack, not very satisfying. \| \\[^\s<] ) # labels for headings (?:@[\w+%-]+(?:\.[\w\|%-]+)?)? )/x ## # Version of CROSSREF_REGEXP used when <tt>--hyperlink-all</tt> is specified. ALL_CROSSREF_REGEXP = / (?:^\|[\s()]) ( (?: # A::B::C.meth #{CLASS_REGEXP_STR}(?:[.#]\|::)#{METHOD_REGEXP_STR} # Stand-alone method \| \\?#{METHOD_REGEXP_STR} # A::B::C \| #{CLASS_REGEXP_STR}(?=[@\s).?!,;<\000]\|\z) # Things that look like filenames \| (?:\.\.\/)[-\/\w]+[_\/.][-\w\/.]+ # Things that have markup suppressed \| \\[^\s<] ) # labels for headings (?:@[\w+%-]+)? )/x ## # Hash of references that have been looked-up to their replacements attr_accessor :seen ## # Allows cross-references to be created based on the given +context+ # (RDoc::Context). def initialize context @context = context @store = context.store @seen = {} end ## # Returns a reference to +name+. # # If the reference is found and +name+ is not documented +text+ will be # returned. If +name+ is escaped +name+ is returned. If +name+ is not # found +text+ is returned. def resolve name, text return @seen[name] if @seen.include? name if /#{CLASS_REGEXP_STR}([.#]\|::)#{METHOD_REGEXP_STR}/o =~ name then type = $2 if '.' == type # will find either #method or ::method method = $3 else method = "#{type}#{$3}" end container = @context.find_symbol_module($1) elsif /^([.#]\|::)#{METHOD_REGEXP_STR}/o =~ name then type = $1 if '.' == type method = $2 else method = "#{type}#{$2}" end container = @context else type = nil container = nil end if container then unless RDoc::TopLevel === container then if '.' == type then if 'new' == method then # AnyClassName.new will be class method ref = container.find_local_symbol method ref = container.find_ancestor_local_symbol method unless ref else ref = container.find_local_symbol "::#{method}" ref = container.find_ancestor_local_symbol "::#{method}" unless ref ref = container.find_local_symbol "##{method}" unless ref ref = container.find_ancestor_local_symbol "##{method}" unless ref end else ref = container.find_local_symbol method ref = container.find_ancestor_local_symbol method unless ref end end end ref = case name when /^\\(#{CLASS_REGEXP_STR})$/o then @context.find_symbol $1 else @context.find_symbol name end unless ref # Try a page name ref = @store.page name if not ref and name =~ /^\w+$/ ref = nil if RDoc::Alias === ref # external alias, can't link to it out = if name == '\\' then name elsif name =~ /^\\/ then # we remove the \ only in front of what we know: # other backslashes are treated later, only outside of <tt> ref ? $' : name elsif ref then if ref.display? then ref else text end else text end @seen[name] = out out end end