Current File : //opt/alt/ruby27/share/ruby/irb/workspace.rb
# frozen_string_literal: false
#
# irb/workspace-binding.rb -
# $Release Version: 0.9.6$
# $Revision$
# by Keiju ISHITSUKA(keiju@ruby-lang.org)
#
# --
#
#
#
require "delegate"
module IRB # :nodoc:
class WorkSpace
# Creates a new workspace.
#
# set self to main if specified, otherwise
# inherit main from TOPLEVEL_BINDING.
def initialize(*main)
if main[0].kind_of?(Binding)
@binding = main.shift
elsif IRB.conf[:SINGLE_IRB]
@binding = TOPLEVEL_BINDING
else
case IRB.conf[:CONTEXT_MODE]
when 0 # binding in proc on TOPLEVEL_BINDING
@binding = eval("proc{binding}.call",
TOPLEVEL_BINDING,
__FILE__,
__LINE__)
when 1 # binding in loaded file
require "tempfile"
f = Tempfile.open("irb-binding")
f.print <<EOF
$binding = binding
EOF
f.close
load f.path
@binding = $binding
when 2 # binding in loaded file(thread use)
unless defined? BINDING_QUEUE
IRB.const_set(:BINDING_QUEUE, Thread::SizedQueue.new(1))
Thread.abort_on_exception = true
Thread.start do
eval "require \"irb/ws-for-case-2\"", TOPLEVEL_BINDING, __FILE__, __LINE__
end
Thread.pass
end
@binding = BINDING_QUEUE.pop
when 3 # binding in function on TOPLEVEL_BINDING(default)
@binding = eval("self.class.send(:remove_method, :irb_binding) if defined?(irb_binding); private; def irb_binding; binding; end; irb_binding",
TOPLEVEL_BINDING,
__FILE__,
__LINE__ - 3)
end
end
if main.empty?
@main = eval("self", @binding)
else
@main = main[0]
end
IRB.conf[:__MAIN__] = @main
unless main.empty?
case @main
when Module
@binding = eval("IRB.conf[:__MAIN__].module_eval('binding', __FILE__, __LINE__)", @binding, __FILE__, __LINE__)
else
begin
@binding = eval("IRB.conf[:__MAIN__].instance_eval('binding', __FILE__, __LINE__)", @binding, __FILE__, __LINE__)
rescue TypeError
fail CantChangeBinding, @main.inspect
end
end
end
case @main
when Object
use_delegator = @main.frozen?
else
use_delegator = true
end
if use_delegator
@main = SimpleDelegator.new(@main)
IRB.conf[:__MAIN__] = @main
@main.singleton_class.class_eval do
private
define_method(:exit) do |*a, &b|
# Do nothing, will be overridden
end
define_method(:binding, Kernel.instance_method(:binding))
define_method(:local_variables, Kernel.instance_method(:local_variables))
end
@binding = eval("IRB.conf[:__MAIN__].instance_eval('binding', __FILE__, __LINE__)", @binding, *@binding.source_location)
end
@binding.local_variable_set(:_, nil)
end
# The Binding of this workspace
attr_reader :binding
# The top-level workspace of this context, also available as
# <code>IRB.conf[:__MAIN__]</code>
attr_reader :main
# Evaluate the given +statements+ within the context of this workspace.
def evaluate(context, statements, file = __FILE__, line = __LINE__)
eval(statements, @binding, file, line)
end
def local_variable_set(name, value)
@binding.local_variable_set(name, value)
end
def local_variable_get(name)
@binding.local_variable_get(name)
end
# error message manipulator
def filter_backtrace(bt)
return nil if bt =~ /\/irb\/.*\.rb/
return nil if bt =~ /\/irb\.rb/
case IRB.conf[:CONTEXT_MODE]
when 1
return nil if bt =~ %r!/tmp/irb-binding!
when 3
bt = bt.sub(/:\s*in `irb_binding'/, '')
end
bt
end
def code_around_binding
if @binding.respond_to?(:source_location)
file, pos = @binding.source_location
else
file, pos = @binding.eval('[__FILE__, __LINE__]')
end
if defined?(::SCRIPT_LINES__[file]) && lines = ::SCRIPT_LINES__[file]
code = ::SCRIPT_LINES__[file].join('')
else
begin
code = File.read(file)
rescue SystemCallError
return
end
end
# NOT using #use_colorize? of IRB.conf[:MAIN_CONTEXT] because this method may be called before IRB::Irb#run
use_colorize = IRB.conf.fetch(:USE_COLORIZE, true)
if use_colorize
lines = Color.colorize_code(code).lines
else
lines = code.lines
end
pos -= 1
start_pos = [pos - 5, 0].max
end_pos = [pos + 5, lines.size - 1].min
if use_colorize
fmt = " %2s #{Color.colorize("%#{end_pos.to_s.length}d", [:BLUE, :BOLD])}: %s"
else
fmt = " %2s %#{end_pos.to_s.length}d: %s"
end
body = (start_pos..end_pos).map do |current_pos|
sprintf(fmt, pos == current_pos ? '=>' : '', current_pos + 1, lines[current_pos])
end.join("")
"\nFrom: #{file} @ line #{pos + 1} :\n\n#{body}#{Color.clear}\n"
end
def IRB.delete_caller
end
end
end