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| Current File : //usr/share/ruby/irb/completion.rb |
#
# irb/completor.rb -
# $Release Version: 0.9$
# $Revision: 38656 $
# by Keiju ISHITSUKA(keiju@ishitsuka.com)
# From Original Idea of shugo@ruby-lang.org
#
require "readline"
module IRB
module InputCompletor # :nodoc:
@RCS_ID='-$Id: completion.rb 38656 2012-12-29 12:59:06Z keiju $-'
# Set of reserved words used by Ruby, you should not use these for
# constants or variables
ReservedWords = [
"BEGIN", "END",
"alias", "and",
"begin", "break",
"case", "class",
"def", "defined", "do",
"else", "elsif", "end", "ensure",
"false", "for",
"if", "in",
"module",
"next", "nil", "not",
"or",
"redo", "rescue", "retry", "return",
"self", "super",
"then", "true",
"undef", "unless", "until",
"when", "while",
"yield",
]
CompletionProc = proc { |input|
bind = IRB.conf[:MAIN_CONTEXT].workspace.binding
# puts "input: #{input}"
case input
when /^((["'`]).*\2)\.([^.]*)$/
# String
receiver = $1
message = Regexp.quote($3)
candidates = String.instance_methods.collect{|m| m.to_s}
select_message(receiver, message, candidates)
when /^(\/[^\/]*\/)\.([^.]*)$/
# Regexp
receiver = $1
message = Regexp.quote($2)
candidates = Regexp.instance_methods.collect{|m| m.to_s}
select_message(receiver, message, candidates)
when /^([^\]]*\])\.([^.]*)$/
# Array
receiver = $1
message = Regexp.quote($2)
candidates = Array.instance_methods.collect{|m| m.to_s}
select_message(receiver, message, candidates)
when /^([^\}]*\})\.([^.]*)$/
# Proc or Hash
receiver = $1
message = Regexp.quote($2)
candidates = Proc.instance_methods.collect{|m| m.to_s}
candidates |= Hash.instance_methods.collect{|m| m.to_s}
select_message(receiver, message, candidates)
when /^(:[^:.]*)$/
# Symbol
if Symbol.respond_to?(:all_symbols)
sym = $1
candidates = Symbol.all_symbols.collect{|s| ":" + s.id2name}
candidates.grep(/^#{Regexp.quote(sym)}/)
else
[]
end
when /^::([A-Z][^:\.\(]*)$/
# Absolute Constant or class methods
receiver = $1
candidates = Object.constants.collect{|m| m.to_s}
candidates.grep(/^#{receiver}/).collect{|e| "::" + e}
# when /^(((::)?[A-Z][^:.\(]*)+)::?([^:.]*)$/
when /^([A-Z].*)::([^:.]*)$/
# Constant or class methods
receiver = $1
message = Regexp.quote($2)
begin
candidates = eval("#{receiver}.constants.collect{|m| m.to_s}", bind)
candidates |= eval("#{receiver}.methods.collect{|m| m.to_s}", bind)
rescue Exception
candidates = []
end
select_message(receiver, message, candidates, "::")
when /^(:[^:.]+)(\.|::)([^.]*)$/
# Symbol
receiver = $1
sep = $2
message = Regexp.quote($3)
candidates = Symbol.instance_methods.collect{|m| m.to_s}
select_message(receiver, message, candidates, sep)
when /^(-?(0[dbo])?[0-9_]+(\.[0-9_]+)?([eE]-?[0-9]+)?)(\.|::)([^.]*)$/
# Numeric
receiver = $1
sep = $5
message = Regexp.quote($6)
begin
candidates = eval(receiver, bind).methods.collect{|m| m.to_s}
rescue Exception
candidates = []
end
select_message(receiver, message, candidates, sep)
when /^(-?0x[0-9a-fA-F_]+)(\.|::)([^.]*)$/
# Numeric(0xFFFF)
receiver = $1
sep = $2
message = Regexp.quote($3)
begin
candidates = eval(receiver, bind).methods.collect{|m| m.to_s}
rescue Exception
candidates = []
end
select_message(receiver, message, candidates, sep)
when /^(\$[^.]*)$/
# global var
regmessage = Regexp.new(Regexp.quote($1))
candidates = global_variables.collect{|m| m.to_s}.grep(regmessage)
# when /^(\$?(\.?[^.]+)+)\.([^.]*)$/
# when /^((\.?[^.]+)+)\.([^.]*)$/
# when /^([^."].*)\.([^.]*)$/
when /^([^."].*)(\.|::)([^.]*)$/
# variable.func or func.func
receiver = $1
sep = $2
message = Regexp.quote($3)
gv = eval("global_variables", bind).collect{|m| m.to_s}
lv = eval("local_variables", bind).collect{|m| m.to_s}
iv = eval("instance_variables", bind).collect{|m| m.to_s}
cv = eval("self.class.constants", bind).collect{|m| m.to_s}
if (gv | lv | iv | cv).include?(receiver) or /^[A-Z]/ =~ receiver && /\./ !~ receiver
# foo.func and foo is var. OR
# foo::func and foo is var. OR
# foo::Const and foo is var. OR
# Foo::Bar.func
begin
candidates = []
rec = eval(receiver, bind)
if sep == "::" and rec.kind_of?(Module)
candidates = rec.constants.collect{|m| m.to_s}
end
candidates |= rec.methods.collect{|m| m.to_s}
rescue Exception
candidates = []
end
else
# func1.func2
candidates = []
ObjectSpace.each_object(Module){|m|
begin
name = m.name
rescue Exception
name = ""
end
begin
next if name != "IRB::Context" and
/^(IRB|SLex|RubyLex|RubyToken)/ =~ name
rescue Exception
next
end
candidates.concat m.instance_methods(false).collect{|x| x.to_s}
}
candidates.sort!
candidates.uniq!
end
select_message(receiver, message, candidates, sep)
when /^\.([^.]*)$/
# unknown(maybe String)
receiver = ""
message = Regexp.quote($1)
candidates = String.instance_methods(true).collect{|m| m.to_s}
select_message(receiver, message, candidates)
else
candidates = eval("methods | private_methods | local_variables | instance_variables | self.class.constants", bind).collect{|m| m.to_s}
(candidates|ReservedWords).grep(/^#{Regexp.quote(input)}/)
end
}
# Set of available operators in Ruby
Operators = ["%", "&", "*", "**", "+", "-", "/",
"<", "<<", "<=", "<=>", "==", "===", "=~", ">", ">=", ">>",
"[]", "[]=", "^", "!", "!=", "!~"]
def self.select_message(receiver, message, candidates, sep = ".")
candidates.grep(/^#{message}/).collect do |e|
case e
when /^[a-zA-Z_]/
receiver + sep + e
when /^[0-9]/
when *Operators
#receiver + " " + e
end
end
end
end
end
if Readline.respond_to?("basic_word_break_characters=")
# Readline.basic_word_break_characters= " \t\n\"\\'`><=;|&{("
Readline.basic_word_break_characters= " \t\n`><=;|&{("
end
Readline.completion_append_character = nil
Readline.completion_proc = IRB::InputCompletor::CompletionProc