Module: VER::EvalCompleter

Defined in:
lib/ver/vendor/eval_completer.rb

Overview

Completion based on some code of IRB::InputCompleter

Copyright by Keiju ISHITSUKA <[email protected]>

and Michael Fellinger <[email protected]>

From Original Idea of [email protected]

Constant Summary collapse

ReservedWords = 
%w[
  BEGIN END alias and begin break case class def defined do else elsif end
  ensure false for if in module next nil not or redo rescue retry return self
  super then true undef unless until when while yield
]
Operators = 
%w[
  % & * ** + - / < << <= <=> == === =~ > >= >> [] []= ^ ! != !~
]
WordBreak = 
/[\t\n"'`><=;|&{(]/

Class Method Summary collapse

Class Method Details

.complete(input, bind = TOPLEVEL_BINDING) ⇒ Object 



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# File 'lib/ver/vendor/eval_completer.rb', line 22

def complete(input, bind = TOPLEVEL_BINDING)
  case input
  when /^(\/[^\/]*\/)\.([^.]*)$/
    complete_regexp_method($1, Regexp.quote($2))
  when /^([^\]]*\])\.([^.]*)$/
    complete_array_method($1, Regexp.quote($2))
  when /^([^\}]*\})\.([^.]*)$/
    complete_proc_or_hash_method($1, Regexp.quote($2))
  when /^(:[^:.]*)$/
    complete_symbol(Regexp.quote($1))
  when /^::([A-Z][^:\.\(]*)$/
    complete_absolute_constant_or_class_method(Regexp.quote($1))
  when /^(((::)?[A-Z][^:.\(]*)+)::?([^:.]*)$/
    complete_constant_or_class_method(bind, $1, Regexp.quote($4))
  when /^(:[^:.]+)\.([^.]*)$/
    complete_symbol_method($1, Regexp.quote($2))
  when /^(-?(0[dbo])?[0-9_]+(\.[0-9_]+)?([eE]-?[0-9]+)?)\.([^.]*)$/
    complete_numeric_method(bind, $1, Regexp.quote($5))
  when /^(-?0x[0-9a-fA-F_]+)\.([^.]*)$/
    complete_numeric_hex_method(bind, $1, Regexp.quote($2))
  when /^(\$[^.]*)$/
    complete_global_variable(Regexp.new(Regexp.quote($1)))
  when /^((\.?[^.]+)+)\.([^.]*)$/
    complete_variable(bind, $1, Regexp.quote($3))
  when /^\.([^.]*)$/
    complete_unknown(Regexp.quote($1))
  else
    complete_else(bind, Regexp.quote(input))
  end
end

.complete_absolute_constant_or_class_method(receiver) ⇒ Object 



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# File 'lib/ver/vendor/eval_completer.rb', line 74

def complete_absolute_constant_or_class_method(receiver)
  candidates = Object.constants
  candidates.grep(/^#{receiver}/).map{|name| "::#{name}" }
end

.complete_array_method(receiver, message) ⇒ Object 



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# File 'lib/ver/vendor/eval_completer.rb', line 58

def complete_array_method(receiver, message)
  candidates = Array.instance_methods
  select_message(receiver, message, candidates)
end

.complete_constant_or_class_method(bind, receiver, message) ⇒ Object 



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# File 'lib/ver/vendor/eval_completer.rb', line 79

def complete_constant_or_class_method(bind, receiver, message)
  begin
    candidates =  eval("#{receiver}.constants", bind)
    candidates |= eval("#{receiver}.methods", bind)
  rescue Exception
    candidates = [*candidates]
  end

  candidates.grep(/^#{message}/).map{|name| "#{receiver}::#{name}" }
end

.complete_else(bind, receiver) ⇒ Object 



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# File 'lib/ver/vendor/eval_completer.rb', line 165

def complete_else(bind, receiver)
  code = "methods | private_methods | local_variables | self.class.constants"
  candidates = eval(code, bind)

  (candidates|ReservedWords).grep(/^#{receiver}/).map(&:to_s)
end

.complete_global_variable(regmessage) ⇒ Object 



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# File 'lib/ver/vendor/eval_completer.rb', line 116

def complete_global_variable(regmessage)
  global_variables.grep(regmessage).map(&:to_s)
end

.complete_numeric_hex_method(bind, receiver, message) ⇒ Object

Numeric(0xFFFF)



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# File 'lib/ver/vendor/eval_completer.rb', line 106

def complete_numeric_hex_method(bind, receiver, message)
  begin
    candidates = eval(receiver, bind).methods
  rescue Exception
    candidates = []
  end

  select_message(receiver, message, candidates)
end

.complete_numeric_method(bind, receiver, message) ⇒ Object 



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# File 'lib/ver/vendor/eval_completer.rb', line 95

def complete_numeric_method(bind, receiver, message)
  begin
    candidates = eval(receiver, bind).methods
  rescue Exception
    candidates = []
  end

  select_message(receiver, message, candidates)
end

.complete_proc_or_hash_method(receiver, message) ⇒ Object 



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# File 'lib/ver/vendor/eval_completer.rb', line 63

def complete_proc_or_hash_method(receiver, message)
  candidates = Proc.instance_methods
  candidates |= Hash.instance_methods
  select_message(receiver, message, candidates)
end

.complete_regexp_method(receiver, message) ⇒ Object 



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# File 'lib/ver/vendor/eval_completer.rb', line 53

def complete_regexp_method(receiver, message)
  candidates = Regexp.instance_methods
  select_message(receiver, message, candidates)
end

.complete_symbol(sym) ⇒ Object 



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# File 'lib/ver/vendor/eval_completer.rb', line 69

def complete_symbol(sym)
  candidates = Symbol.all_symbols.map(&:inspect)
  candidates.grep(/^#{sym}/)
end

.complete_symbol_method(receiver, message) ⇒ Object 



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# File 'lib/ver/vendor/eval_completer.rb', line 90

def complete_symbol_method(receiver, message)
  candidates = Symbol.instance_methods
  select_message(receiver, message, candidates)
end

.complete_unknown(message) ⇒ Object

unknown(maybe String)



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# File 'lib/ver/vendor/eval_completer.rb', line 158

def complete_unknown(message)
  receiver = ""

  candidates = String.instance_methods(true)
  select_message(receiver, message, candidates)
end

.complete_variable(bind, receiver, message) ⇒ Object 



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# File 'lib/ver/vendor/eval_completer.rb', line 120

def complete_variable(bind, receiver, message)
  gv = eval("global_variables",     bind).map(&:to_s)
  lv = eval("local_variables",      bind).map(&:to_s)
  cv = eval("self.class.constants", bind).map(&:to_s)

  if (gv | lv | cv).include?(receiver)
    # foo.func and foo is local var.
    candidates = eval("#{receiver}.methods", bind)
  elsif /^[A-Z]/ =~ receiver and /\./ !~ receiver
    # Foo::Bar.func
    begin
      candidates = eval("#{receiver}.methods", bind)
    rescue Exception
      candidates = []
    end
  else
    # func1.func2
    candidates = []

    ObjectSpace.each_object(Module) do |mod|
      begin
        name = mod.name
      rescue Exception
        name = ""
      end

      next if name != "IRB::Context" && /^(IRB|SLex|RubyLex|RubyToken)/ =~ name
      candidates.concat mod.instance_methods(false)
    end

    candidates.sort!
    candidates.uniq!
  end

  select_message(receiver, message, candidates)
end

.select_message(receiver, message, candidates) ⇒ Object 



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# File 'lib/ver/vendor/eval_completer.rb', line 172

def select_message(receiver, message, candidates)
  candidates.grep(/^#{message}/).map{|entity|
    case entity
    when /^[a-zA-Z_]/
      "#{receiver}.#{entity}"
    when /^[0-9]/
    when *Operators
      # "#{receiver} #{entity}"
    end
  }.compact
end