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# frozen_string_literal: true require 'cgi' ## # A Context is something that can hold modules, classes, methods, attributes, # aliases, requires, and includes. Classes, modules, and files are all # Contexts. class RDoc::Context < RDoc::CodeObject include Comparable ## # Types of methods TYPES = %w[class instance] ## # If a context has these titles it will be sorted in this order. TOMDOC_TITLES = [nil, 'Public', 'Internal', 'Deprecated'] # :nodoc: TOMDOC_TITLES_SORT = TOMDOC_TITLES.sort_by { \|title\| title.to_s } # :nodoc: ## # Class/module aliases attr_reader :aliases ## # All attr* methods attr_reader :attributes ## # Block params to be used in the next MethodAttr parsed under this context attr_accessor :block_params ## # Constants defined attr_reader :constants ## # Sets the current documentation section of documentation attr_writer :current_section ## # Files this context is found in attr_reader :in_files ## # Modules this context includes attr_reader :includes ## # Modules this context is extended with attr_reader :extends ## # Methods defined in this context attr_reader :method_list ## # Name of this class excluding namespace. See also full_name attr_reader :name ## # Files this context requires attr_reader :requires ## # Use this section for the next method, attribute or constant added. attr_accessor :temporary_section ## # Hash <tt>old_name => [aliases]</tt>, for aliases # that haven't (yet) been resolved to a method/attribute. # (Not to be confused with the aliases of the context.) attr_accessor :unmatched_alias_lists ## # Aliases that could not be resolved. attr_reader :external_aliases ## # Current visibility of this context attr_accessor :visibility ## # Current visibility of this line attr_writer :current_line_visibility ## # Hash of registered methods. Attributes are also registered here, # twice if they are RW. attr_reader :methods_hash ## # Params to be used in the next MethodAttr parsed under this context attr_accessor :params ## # Hash of registered constants. attr_reader :constants_hash ## # Creates an unnamed empty context with public current visibility def initialize super @in_files = [] @name \|\|= "unknown" @parent = nil @visibility = :public @current_section = Section.new self, nil, nil @sections = { nil => @current_section } @temporary_section = nil @classes = {} @modules = {} initialize_methods_etc end ## # Sets the defaults for methods and so-forth def initialize_methods_etc @method_list = [] @attributes = [] @aliases = [] @requires = [] @includes = [] @extends = [] @constants = [] @external_aliases = [] @current_line_visibility = nil # This Hash maps a method name to a list of unmatched aliases (aliases of # a method not yet encountered). @unmatched_alias_lists = {} @methods_hash = {} @constants_hash = {} @params = nil @store \|\|= nil end ## # Contexts are sorted by full_name def <=>(other) return nil unless RDoc::CodeObject === other full_name <=> other.full_name end ## # Adds an item of type +klass+ with the given +name+ and +comment+ to the # context. # # Currently only RDoc::Extend and RDoc::Include are supported. def add klass, name, comment if RDoc::Extend == klass then ext = RDoc::Extend.new name, comment add_extend ext elsif RDoc::Include == klass then incl = RDoc::Include.new name, comment add_include incl else raise NotImplementedError, "adding a #{klass} is not implemented" end end ## # Adds +an_alias+ that is automatically resolved def add_alias an_alias return an_alias unless @document_self method_attr = find_method(an_alias.old_name, an_alias.singleton) \|\| find_attribute(an_alias.old_name, an_alias.singleton) if method_attr then method_attr.add_alias an_alias, self else add_to @external_aliases, an_alias unmatched_alias_list = @unmatched_alias_lists[an_alias.pretty_old_name] \|\|= [] unmatched_alias_list.push an_alias end an_alias end ## # Adds +attribute+ if not already there. If it is (as method(s) or attribute), # updates the comment if it was empty. # # The attribute is registered only if it defines a new method. # For instance, <tt>attr_reader :foo</tt> will not be registered # if method +foo+ exists, but <tt>attr_accessor :foo</tt> will be registered # if method +foo+ exists, but <tt>foo=</tt> does not. def add_attribute attribute return attribute unless @document_self # mainly to check for redefinition of an attribute as a method # TODO find a policy for 'attr_reader :foo' + 'def foo=()' register = false key = nil if attribute.rw.index 'R' then key = attribute.pretty_name known = @methods_hash[key] if known then known.comment = attribute.comment if known.comment.empty? elsif registered = @methods_hash[attribute.pretty_name + '='] and RDoc::Attr === registered then registered.rw = 'RW' else @methods_hash[key] = attribute register = true end end if attribute.rw.index 'W' then key = attribute.pretty_name + '=' known = @methods_hash[key] if known then known.comment = attribute.comment if known.comment.empty? elsif registered = @methods_hash[attribute.pretty_name] and RDoc::Attr === registered then registered.rw = 'RW' else @methods_hash[key] = attribute register = true end end if register then attribute.visibility = @visibility add_to @attributes, attribute resolve_aliases attribute end attribute end ## # Adds a class named +given_name+ with +superclass+. # # Both +given_name+ and +superclass+ may contain '::', and are # interpreted relative to the +self+ context. This allows handling correctly # examples like these: # class RDoc::Gauntlet < Gauntlet # module Mod # class Object # implies < ::Object # class SubObject < Object # this is _not_ ::Object # # Given <tt>class Container::Item</tt> RDoc assumes +Container+ is a module # unless it later sees <tt>class Container</tt>. +add_class+ automatically # upgrades +given_name+ to a class in this case. def add_class class_type, given_name, superclass = '::Object' # superclass +nil+ is passed by the C parser in the following cases: # - registering Object in 1.8 (correct) # - registering BasicObject in 1.9 (correct) # - registering RubyVM in 1.9 in iseq.c (incorrect: < Object in vm.c) # # If we later find a superclass for a registered class with a nil # superclass, we must honor it. # find the name & enclosing context if given_name =~ /^:+(\w+)$/ then full_name = $1 enclosing = top_level name = full_name.split(/:+/).last else full_name = child_name given_name if full_name =~ /^(.+)::(\w+)$/ then name = $2 ename = $1 enclosing = @store.classes_hash[ename] \|\| @store.modules_hash[ename] # HACK: crashes in actionpack/lib/action_view/helpers/form_helper.rb (metaprogramming) unless enclosing then # try the given name at top level (will work for the above example) enclosing = @store.classes_hash[given_name] \|\| @store.modules_hash[given_name] return enclosing if enclosing # not found: create the parent(s) names = ename.split('::') enclosing = self names.each do \|n\| enclosing = enclosing.classes_hash[n] \|\| enclosing.modules_hash[n] \|\| enclosing.add_module(RDoc::NormalModule, n) end end else name = full_name enclosing = self end end # fix up superclass if full_name == 'BasicObject' then superclass = nil elsif full_name == 'Object' then superclass = '::BasicObject' end # find the superclass full name if superclass then if superclass =~ /^:+/ then superclass = $' #' else if superclass =~ /^(\w+):+(.+)$/ then suffix = $2 mod = find_module_named($1) superclass = mod.full_name + '::' + suffix if mod else mod = find_module_named(superclass) superclass = mod.full_name if mod end end # did we believe it was a module? mod = @store.modules_hash.delete superclass upgrade_to_class mod, RDoc::NormalClass, mod.parent if mod # e.g., Object < Object superclass = nil if superclass == full_name end klass = @store.classes_hash[full_name] if klass then # if TopLevel, it may not be registered in the classes: enclosing.classes_hash[name] = klass # update the superclass if needed if superclass then existing = klass.superclass existing = existing.full_name unless existing.is_a?(String) if existing if existing.nil? \|\| (existing == 'Object' && superclass != 'Object') then klass.superclass = superclass end end else # this is a new class mod = @store.modules_hash.delete full_name if mod then klass = upgrade_to_class mod, RDoc::NormalClass, enclosing klass.superclass = superclass unless superclass.nil? else klass = class_type.new name, superclass enclosing.add_class_or_module(klass, enclosing.classes_hash, @store.classes_hash) end end klass.parent = self klass end ## # Adds the class or module +mod+ to the modules or # classes Hash +self_hash+, and to +all_hash+ (either # <tt>TopLevel::modules_hash</tt> or <tt>TopLevel::classes_hash</tt>), # unless #done_documenting is +true+. Sets the #parent of +mod+ # to +self+, and its #section to #current_section. Returns +mod+. def add_class_or_module mod, self_hash, all_hash mod.section = current_section # TODO declaring context? something is # wrong here... mod.parent = self mod.full_name = nil mod.store = @store unless @done_documenting then self_hash[mod.name] = mod # this must be done AFTER adding mod to its parent, so that the full # name is correct: all_hash[mod.full_name] = mod if @store.unmatched_constant_alias[mod.full_name] then to, file = @store.unmatched_constant_alias[mod.full_name] add_module_alias mod, mod.name, to, file end end mod end ## # Adds +constant+ if not already there. If it is, updates the comment, # value and/or is_alias_for of the known constant if they were empty/nil. def add_constant constant return constant unless @document_self # HACK: avoid duplicate 'PI' & 'E' in math.c (1.8.7 source code) # (this is a #ifdef: should be handled by the C parser) known = @constants_hash[constant.name] if known then known.comment = constant.comment if known.comment.empty? known.value = constant.value if known.value.nil? or known.value.strip.empty? known.is_alias_for \|\|= constant.is_alias_for else @constants_hash[constant.name] = constant add_to @constants, constant end constant end ## # Adds included module +include+ which should be an RDoc::Include def add_include include add_to @includes, include include end ## # Adds extension module +ext+ which should be an RDoc::Extend def add_extend ext add_to @extends, ext ext end ## # Adds +method+ if not already there. If it is (as method or attribute), # updates the comment if it was empty. def add_method method return method unless @document_self # HACK: avoid duplicate 'new' in io.c & struct.c (1.8.7 source code) key = method.pretty_name known = @methods_hash[key] if known then if @store then # otherwise we are loading known.comment = method.comment if known.comment.empty? previously = ", previously in #{known.file}" unless method.file == known.file @store.rdoc.options.warn \ "Duplicate method #{known.full_name} in #{method.file}#{previously}" end else @methods_hash[key] = method if @current_line_visibility method.visibility, @current_line_visibility = @current_line_visibility, nil else method.visibility = @visibility end add_to @method_list, method resolve_aliases method end method end ## # Adds a module named +name+. If RDoc already knows +name+ is a class then # that class is returned instead. See also #add_class. def add_module(class_type, name) mod = @classes[name] \|\| @modules[name] return mod if mod full_name = child_name name mod = @store.modules_hash[full_name] \|\| class_type.new(name) add_class_or_module mod, @modules, @store.modules_hash end ## # Adds a module by +RDoc::NormalModule+ instance. See also #add_module. def add_module_by_normal_module(mod) add_class_or_module mod, @modules, @store.modules_hash end ## # Adds an alias from +from+ (a class or module) to +name+ which was defined # in +file+. def add_module_alias from, from_name, to, file return from if @done_documenting to_full_name = child_name to.name # if we already know this name, don't register an alias: # see the metaprogramming in lib/active_support/basic_object.rb, # where we already know BasicObject is a class when we find # BasicObject = BlankSlate return from if @store.find_class_or_module to_full_name unless from @store.unmatched_constant_alias[child_name(from_name)] = [to, file] return to end new_to = from.dup new_to.name = to.name new_to.full_name = nil if new_to.module? then @store.modules_hash[to_full_name] = new_to @modules[to.name] = new_to else @store.classes_hash[to_full_name] = new_to @classes[to.name] = new_to end # Registers a constant for this alias. The constant value and comment # will be updated later, when the Ruby parser adds the constant const = RDoc::Constant.new to.name, nil, new_to.comment const.record_location file const.is_alias_for = from add_constant const new_to end ## # Adds +require+ to this context's top level def add_require(require) return require unless @document_self if RDoc::TopLevel === self then add_to @requires, require else parent.add_require require end end ## # Returns a section with +title+, creating it if it doesn't already exist. # +comment+ will be appended to the section's comment. # # A section with a +title+ of +nil+ will return the default section. # # See also RDoc::Context::Section def add_section title, comment = nil if section = @sections[title] then section.add_comment comment if comment else section = Section.new self, title, comment @sections[title] = section end section end ## # Adds +thing+ to the collection +array+ def add_to array, thing array << thing if @document_self thing.parent = self thing.store = @store if @store thing.section = current_section end ## # Is there any content? # # This means any of: comment, aliases, methods, attributes, external # aliases, require, constant. # # Includes and extends are also checked unless <tt>includes == false</tt>. def any_content(includes = true) @any_content \|\|= !( @comment.empty? && @method_list.empty? && @attributes.empty? && @aliases.empty? && @external_aliases.empty? && @requires.empty? && @constants.empty? ) @any_content \|\| (includes && !(@includes + @extends).empty? ) end ## # Creates the full name for a child with +name+ def child_name name if name =~ /^:+/ $' #' elsif RDoc::TopLevel === self then name else "#{self.full_name}::#{name}" end end ## # Class attributes def class_attributes @class_attributes \|\|= attributes.select { \|a\| a.singleton } end ## # Class methods def class_method_list @class_method_list \|\|= method_list.select { \|a\| a.singleton } end ## # Array of classes in this context def classes @classes.values end ## # All classes and modules in this namespace def classes_and_modules classes + modules end ## # Hash of classes keyed by class name def classes_hash @classes end ## # The current documentation section that new items will be added to. If # temporary_section is available it will be used. def current_section if section = @temporary_section then @temporary_section = nil else section = @current_section end section end ## # Is part of this thing was defined in +file+? def defined_in?(file) @in_files.include?(file) end def display(method_attr) # :nodoc: if method_attr.is_a? RDoc::Attr "#{method_attr.definition} #{method_attr.pretty_name}" else "method #{method_attr.pretty_name}" end end ## # Iterator for ancestors for duck-typing. Does nothing. See # RDoc::ClassModule#each_ancestor. # # This method exists to make it easy to work with Context subclasses that # aren't part of RDoc. def each_ancestor # :nodoc: end ## # Iterator for attributes def each_attribute # :yields: attribute @attributes.each { \|a\| yield a } end ## # Iterator for classes and modules def each_classmodule(&block) # :yields: module classes_and_modules.sort.each(&block) end ## # Iterator for constants def each_constant # :yields: constant @constants.each {\|c\| yield c} end ## # Iterator for included modules def each_include # :yields: include @includes.each do \|i\| yield i end end ## # Iterator for extension modules def each_extend # :yields: extend @extends.each do \|e\| yield e end end ## # Iterator for methods def each_method # :yields: method return enum_for __method__ unless block_given? @method_list.sort.each { \|m\| yield m } end ## # Iterator for each section's contents sorted by title. The +section+, the # section's +constants+ and the sections +attributes+ are yielded. The # +constants+ and +attributes+ collections are sorted. # # To retrieve methods in a section use #methods_by_type with the optional # +section+ parameter. # # NOTE: Do not edit collections yielded by this method def each_section # :yields: section, constants, attributes return enum_for __method__ unless block_given? constants = @constants.group_by do \|constant\| constant.section end attributes = @attributes.group_by do \|attribute\| attribute.section end constants.default = [] attributes.default = [] sort_sections.each do \|section\| yield section, constants[section].select(&:display?).sort, attributes[section].select(&:display?).sort end end ## # Finds an attribute +name+ with singleton value +singleton+. def find_attribute(name, singleton) name = $1 if name =~ /^(.)=$/ @attributes.find { \|a\| a.name == name && a.singleton == singleton } end ## # Finds an attribute with +name+ in this context def find_attribute_named(name) case name when /\A#/ then find_attribute name[1..-1], false when /\A::/ then find_attribute name[2..-1], true else @attributes.find { \|a\| a.name == name } end end ## # Finds a class method with +name+ in this context def find_class_method_named(name) @method_list.find { \|meth\| meth.singleton && meth.name == name } end ## # Finds a constant with +name+ in this context def find_constant_named(name) @constants.find do \|m\| m.name == name \|\| m.full_name == name end end ## # Find a module at a higher scope def find_enclosing_module_named(name) parent && parent.find_module_named(name) end ## # Finds an external alias +name+ with singleton value +singleton+. def find_external_alias(name, singleton) @external_aliases.find { \|m\| m.name == name && m.singleton == singleton } end ## # Finds an external alias with +name+ in this context def find_external_alias_named(name) case name when /\A#/ then find_external_alias name[1..-1], false when /\A::/ then find_external_alias name[2..-1], true else @external_aliases.find { \|a\| a.name == name } end end ## # Finds a file with +name+ in this context def find_file_named name @store.find_file_named name end ## # Finds an instance method with +name+ in this context def find_instance_method_named(name) @method_list.find { \|meth\| !meth.singleton && meth.name == name } end ## # Finds a method, constant, attribute, external alias, module or file # named +symbol+ in this context. def find_local_symbol(symbol) find_method_named(symbol) or find_constant_named(symbol) or find_attribute_named(symbol) or find_external_alias_named(symbol) or find_module_named(symbol) or find_file_named(symbol) end ## # Finds a method named +name+ with singleton value +singleton+. def find_method(name, singleton) @method_list.find { \|m\| if m.singleton m.name == name && m.singleton == singleton else m.name == name && !m.singleton && !singleton end } end ## # Finds a instance or module method with +name+ in this context def find_method_named(name) case name when /\A#/ then find_method name[1..-1], false when /\A::/ then find_method name[2..-1], true else @method_list.find { \|meth\| meth.name == name } end end ## # Find a module with +name+ using ruby's scoping rules def find_module_named(name) res = @modules[name] \|\| @classes[name] return res if res return self if self.name == name find_enclosing_module_named name end ## # Look up +symbol+, first as a module, then as a local symbol. def find_symbol(symbol) find_symbol_module(symbol) \|\| find_local_symbol(symbol) end ## # Look up a module named +symbol+. def find_symbol_module(symbol) result = nil # look for a class or module 'symbol' case symbol when /^::/ then result = @store.find_class_or_module symbol when /^(\w+):+(.+)$/ suffix = $2 top = $1 searched = self while searched do mod = searched.find_module_named(top) break unless mod result = @store.find_class_or_module "#{mod.full_name}::#{suffix}" break if result \|\| searched.is_a?(RDoc::TopLevel) searched = searched.parent end else searched = self while searched do result = searched.find_module_named(symbol) break if result \|\| searched.is_a?(RDoc::TopLevel) searched = searched.parent end end result end ## # The full name for this context. This method is overridden by subclasses. def full_name '(unknown)' end ## # Does this context and its methods and constants all have documentation? # # (Yes, fully documented doesn't mean everything.) def fully_documented? documented? and attributes.all? { \|a\| a.documented? } and method_list.all? { \|m\| m.documented? } and constants.all? { \|c\| c.documented? } end ## # URL for this with a +prefix+ def http_url(prefix) path = name_for_path path = path.gsub(/<<\s(\w)/, 'from-\1') if path =~ /<</ path = [prefix] + path.split('::') File.join(path.compact) + '.html' end ## # Instance attributes def instance_attributes @instance_attributes \|\|= attributes.reject { \|a\| a.singleton } end ## # Instance methods #-- # TODO rename to instance_methods def instance_method_list @instance_method_list \|\|= method_list.reject { \|a\| a.singleton } end ## # Breaks method_list into a nested hash by type (<tt>'class'</tt> or # <tt>'instance'</tt>) and visibility (+:public+, +:protected+, +:private+). # # If +section+ is provided only methods in that RDoc::Context::Section will # be returned. def methods_by_type section = nil methods = {} TYPES.each do \|type\| visibilities = {} RDoc::VISIBILITIES.each do \|vis\| visibilities[vis] = [] end methods[type] = visibilities end each_method do \|method\| next if section and not method.section == section methods[method.type][method.visibility] << method end methods end ## # Yields AnyMethod and Attr entries matching the list of names in +methods+. def methods_matching(methods, singleton = false, &block) (@method_list + @attributes).each do \|m\| yield m if methods.include?(m.name) and m.singleton == singleton end each_ancestor do \|parent\| parent.methods_matching(methods, singleton, &block) end end ## # Array of modules in this context def modules @modules.values end ## # Hash of modules keyed by module name def modules_hash @modules end ## # Name to use to generate the url. # <tt>#full_name</tt> by default. def name_for_path full_name end ## # Changes the visibility for new methods to +visibility+ def ongoing_visibility=(visibility) @visibility = visibility end ## # Record +top_level+ as a file +self+ is in. def record_location(top_level) @in_files << top_level unless @in_files.include?(top_level) end ## # Should we remove this context from the documentation? # # The answer is yes if: # * #received_nodoc is +true+ # * #any_content is +false+ (not counting includes) # * All #includes are modules (not a string), and their module has # <tt>#remove_from_documentation? == true</tt> # * All classes and modules have <tt>#remove_from_documentation? == true</tt> def remove_from_documentation? @remove_from_documentation \|\|= @received_nodoc && !any_content(false) && @includes.all? { \|i\| !i.module.is_a?(String) && i.module.remove_from_documentation? } && classes_and_modules.all? { \|cm\| cm.remove_from_documentation? } end ## # Removes methods and attributes with a visibility less than +min_visibility+. #-- # TODO mark the visibility of attributes in the template (if not public?) def remove_invisible min_visibility return if [:private, :nodoc].include? min_visibility remove_invisible_in @method_list, min_visibility remove_invisible_in @attributes, min_visibility remove_invisible_in @constants, min_visibility end ## # Only called when min_visibility == :public or :private def remove_invisible_in array, min_visibility # :nodoc: if min_visibility == :public then array.reject! { \|e\| e.visibility != :public and not e.force_documentation } else array.reject! { \|e\| e.visibility == :private and not e.force_documentation } end end ## # Tries to resolve unmatched aliases when a method or attribute has just # been added. def resolve_aliases added # resolve any pending unmatched aliases key = added.pretty_name unmatched_alias_list = @unmatched_alias_lists[key] return unless unmatched_alias_list unmatched_alias_list.each do \|unmatched_alias\| added.add_alias unmatched_alias, self @external_aliases.delete unmatched_alias end @unmatched_alias_lists.delete key end ## # Returns RDoc::Context::Section objects referenced in this context for use # in a table of contents. def section_contents used_sections = {} each_method do \|method\| next unless method.display? used_sections[method.section] = true end # order found sections sections = sort_sections.select do \|section\| used_sections[section] end # only the default section is used return [] if sections.length == 1 and not sections.first.title sections end ## # Sections in this context def sections @sections.values end def sections_hash # :nodoc: @sections end ## # Sets the current section to a section with +title+. See also #add_section def set_current_section title, comment @current_section = add_section title, comment end ## # Given an array +methods+ of method names, set the visibility of each to # +visibility+ def set_visibility_for(methods, visibility, singleton = false) methods_matching methods, singleton do \|m\| m.visibility = visibility end end ## # Given an array +names+ of constants, set the visibility of each constant to # +visibility+ def set_constant_visibility_for(names, visibility) names.each do \|name\| constant = @constants_hash[name] or next constant.visibility = visibility end end ## # Sorts sections alphabetically (default) or in TomDoc fashion (none, # Public, Internal, Deprecated) def sort_sections titles = @sections.map { \|title, _\| title } if titles.length > 1 and TOMDOC_TITLES_SORT == (titles \| TOMDOC_TITLES).sort_by { \|title\| title.to_s } then @sections.values_at(*TOMDOC_TITLES).compact else @sections.sort_by { \|title, _\| title.to_s }.map { \|_, section\| section } end end def to_s # :nodoc: "#{self.class.name} #{self.full_name}" end ## # Return the TopLevel that owns us #-- # FIXME we can be 'owned' by several TopLevel (see #record_location & # #in_files) def top_level return @top_level if defined? @top_level @top_level = self @top_level = @top_level.parent until RDoc::TopLevel === @top_level @top_level end ## # Upgrades NormalModule +mod+ in +enclosing+ to a +class_type+ def upgrade_to_class mod, class_type, enclosing enclosing.modules_hash.delete mod.name klass = RDoc::ClassModule.from_module class_type, mod klass.store = @store # if it was there, then we keep it even if done_documenting @store.classes_hash[mod.full_name] = klass enclosing.classes_hash[mod.name] = klass klass end autoload :Section, 'rdoc/context/section' end