Class: Rink::LineProcessor::PureRuby

Inherits:
Base show all
Defined in:
lib/rink/line_processor/pure_ruby.rb

Overview

Performs autocompletion based on method names of objects used. This algorithm is identical to that of IRB.

Constant Summary collapse

OPERATORS = 
["%", "&", "*", "**", "+",  "-",  "/", "<", "<<", "<=", "<=>", "==", "===", "=~", ">", ">=", ">>",
             "[]", "[]=", "^"
]
RESERVED_WORDS = 
[ "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"
]

Instance Attribute Summary

Attributes inherited from Base

#source

Instance Method Summary collapse

Methods inherited from Base

#initialize

Constructor Details

This class inherits a constructor from Rink::LineProcessor::Base

Instance Method Details

#autocomplete(line, namespace) ⇒ Object 



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# File 'lib/rink/line_processor/pure_ruby.rb', line 120

def autocomplete(line, namespace)
  # Borrowed from irb/completion.rb
  result = case line
    when /^(\/[^\/]*\/)\.([^.]*)$/
      autocomplete_for_regexp($1, Regexp.quote($2))
      
    when /^([^\]]*\])\.([^.]*)$/
      autocomplete_for_array($1, Regexp.quote($2))

    when /^([^\}]*\})\.([^.]*)$/
      autocomplete_for_proc_or_hash($1, Regexp.quote($2))
  
    when /^(:[^:.]*)$/
      autocomplete_for_symbol($1)

    when /^::([A-Z][^:\.\(]*)$/
      autocomplete_for_absolute_constant_or_class_methods($1)

    when /^(((::)?[A-Z][^:.\(]*)+)::?([^:.]*)$/
      autocomplete_for_constant_or_class_methods($1, Regexp.quote($4))

    when /^(:[^:.]+)\.([^.]*)$/
      autocomplete_for_symbol_method($1, Regexp.quote($2))

    when /^(-?(0[dbo])?[0-9_]+(\.[0-9_]+)?([eE]-?[0-9]+)?)\.([^.]*)$/
      autocomplete_for_numeric($1, Regexp.quote($5))

    when /^(-?0x[0-9a-fA-F_]+)\.([^.]*)$/
      autocomplete_for_hex_numeric($1, Regexp.quote($2))
    
    when /^(\$[^.]*)$/
      autocomplete_for_global_variable(Regexp.quote($1))
      
    #      when /^(\$?(\.?[^.]+)+)\.([^.]*)$/
    when /^((\.?[^.]+)+)\.([^.]*)$/
      autocomplete_for_variable($1, Regexp.quote($3))

    when /^\.([^.]*)$/
      # unknown(maybe String)
      autocomplete_for_string(Regexp.quote($1))
    else
      candidates = namespace.instance_eval { methods | private_methods | local_variables | self.class.constants }
      (candidates|RESERVED_WORDS).grep(/^#{Regexp.quote(line)}/)
  end
  result.kind_of?(Array) ? 
    result.collect { |r| r.kind_of?(String) ? r : r.to_s } :
    result.kind_of?(String) ? result : result.to_s
end

#autocomplete_for_absolute_constant_or_class_methods(receiver) ⇒ Object 



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# File 'lib/rink/line_processor/pure_ruby.rb', line 39

def autocomplete_for_absolute_constant_or_class_methods(receiver)
  candidates = Object.constants
  candidates.grep(/^#{receiver}/).collect{|e| "::" + e}
end

#autocomplete_for_array(receiver, message) ⇒ Object 



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# File 'lib/rink/line_processor/pure_ruby.rb', line 20

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

#autocomplete_for_constant_or_class_methods(receiver, message) ⇒ Object 



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# File 'lib/rink/line_processor/pure_ruby.rb', line 44

def autocomplete_for_constant_or_class_methods(receiver, message)
  begin
    candidates = eval("#{receiver}.constants | #{receiver}.methods", bind)
  rescue Exception
    candidates = []
  end
  candidates.grep(/^#{message}/).collect{|e| receiver + "::" + e}
end

#autocomplete_for_global_variable(obj) ⇒ Object 



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# File 'lib/rink/line_processor/pure_ruby.rb', line 76

def autocomplete_for_global_variable(obj)
  global_variables.grep(Regexp.new(obj))
end

#autocomplete_for_hex_numeric(receiver, message) ⇒ Object 



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# File 'lib/rink/line_processor/pure_ruby.rb', line 67

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

#autocomplete_for_numeric(receiver, message) ⇒ Object 



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# File 'lib/rink/line_processor/pure_ruby.rb', line 58

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

#autocomplete_for_proc_or_hash(receiver, message) ⇒ Object 



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# File 'lib/rink/line_processor/pure_ruby.rb', line 25

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

#autocomplete_for_regexp(receiver, message) ⇒ Object 



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# File 'lib/rink/line_processor/pure_ruby.rb', line 15

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

#autocomplete_for_string(message) ⇒ Object 



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# File 'lib/rink/line_processor/pure_ruby.rb', line 114

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

#autocomplete_for_symbol(sym) ⇒ Object 



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# File 'lib/rink/line_processor/pure_ruby.rb', line 30

def autocomplete_for_symbol(sym)
  if Symbol.respond_to?(:all_symbols)
    candidates = Symbol.all_symbols.collect{|s| ":" + s.id2name}
    candidates.grep(/^#{sym}/)
  else
    []
  end
end

#autocomplete_for_symbol_method(receiver, message) ⇒ Object 



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# File 'lib/rink/line_processor/pure_ruby.rb', line 53

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

#autocomplete_for_variable(receiver, message) ⇒ Object 



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# File 'lib/rink/line_processor/pure_ruby.rb', line 80

def autocomplete_for_variable(receiver, message)
  gv = eval("global_variables", bind)
  lv = eval("local_variables", bind)
  cv = eval("self.class.constants", bind)
  
  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){|m|
      begin
        name = m.name
      rescue Exception
        name = ""
      end
      next if name != "IRB::Context" and 
        /^(IRB|SLex|RubyLex|RubyToken)/ =~ name
      candidates.concat m.instance_methods(false)
    }
    candidates.sort!
    candidates.uniq!
  end
  select_message(receiver, message, candidates)
end