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# frozen_string_literal: false

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# irb/workspace-binding.rb -

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# $Release Version: 0.9.6$

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# $Revision$

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# by Keiju ISHITSUKA(keiju@ruby-lang.org)

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# --

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require "delegate"

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module IRB # :nodoc:

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class WorkSpace

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# Creates a new workspace.

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# set self to main if specified, otherwise

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# inherit main from TOPLEVEL_BINDING.

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def initialize(*main)

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if main[0].kind_of?(Binding)

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@binding = main.shift

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elsif IRB.conf[:SINGLE_IRB]

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@binding = TOPLEVEL_BINDING

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else

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case IRB.conf[:CONTEXT_MODE]

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when 0 # binding in proc on TOPLEVEL_BINDING

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@binding = eval("proc{binding}.call",

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TOPLEVEL_BINDING,

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__FILE__,

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__LINE__)

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when 1 # binding in loaded file

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require "tempfile"

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f = Tempfile.open("irb-binding")

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f.print <<EOF

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$binding = binding

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EOF

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f.close

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load f.path

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@binding = $binding

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when 2 # binding in loaded file(thread use)

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unless defined? BINDING_QUEUE

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IRB.const_set(:BINDING_QUEUE, Thread::SizedQueue.new(1))

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Thread.abort_on_exception = true

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Thread.start do

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eval "require \"irb/ws-for-case-2\"", TOPLEVEL_BINDING, __FILE__, __LINE__

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end

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Thread.pass

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end

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@binding = BINDING_QUEUE.pop

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when 3 # binding in function on TOPLEVEL_BINDING(default)

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@binding = eval("self.class.send(:remove_method, :irb_binding) if defined?(irb_binding); private; def irb_binding; binding; end; irb_binding",

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TOPLEVEL_BINDING,

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__FILE__,

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__LINE__ - 3)

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end

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end

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if main.empty?

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@main = eval("self", @binding)

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else

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@main = main[0]

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end

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IRB.conf[:__MAIN__] = @main

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unless main.empty?

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case @main

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when Module

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@binding = eval("IRB.conf[:__MAIN__].module_eval('binding', __FILE__, __LINE__)", @binding, __FILE__, __LINE__)

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else

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begin

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@binding = eval("IRB.conf[:__MAIN__].instance_eval('binding', __FILE__, __LINE__)", @binding, __FILE__, __LINE__)

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rescue TypeError

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fail CantChangeBinding, @main.inspect

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end

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end

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end

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case @main

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when Object

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use_delegator = @main.frozen?

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else

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use_delegator = true

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end

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if use_delegator

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@main = SimpleDelegator.new(@main)

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IRB.conf[:__MAIN__] = @main

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@main.singleton_class.class_eval do

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private

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define_method(:exit) do |*a, &b|

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# Do nothing, will be overridden

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end

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define_method(:binding, Kernel.instance_method(:binding))

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define_method(:local_variables, Kernel.instance_method(:local_variables))

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end

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@binding = eval("IRB.conf[:__MAIN__].instance_eval('binding', __FILE__, __LINE__)", @binding, *@binding.source_location)

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end

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@binding.local_variable_set(:_, nil)

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end

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# The Binding of this workspace

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attr_reader :binding

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# The top-level workspace of this context, also available as

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# <code>IRB.conf[:__MAIN__]</code>

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attr_reader :main

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# Evaluate the given +statements+ within the context of this workspace.

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def evaluate(context, statements, file = __FILE__, line = __LINE__)

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eval(statements, @binding, file, line)

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end

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def local_variable_set(name, value)

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@binding.local_variable_set(name, value)

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end

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def local_variable_get(name)

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@binding.local_variable_get(name)

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end

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# error message manipulator

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def filter_backtrace(bt)

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return nil if bt =~ /\/irb\/.*\.rb/

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return nil if bt =~ /\/irb\.rb/

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case IRB.conf[:CONTEXT_MODE]

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when 1

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return nil if bt =~ %r!/tmp/irb-binding!

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when 3

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bt = bt.sub(/:\s*in `irb_binding'/, '')

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end

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end

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def code_around_binding

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if @binding.respond_to?(:source_location)

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file, pos = @binding.source_location

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else

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file, pos = @binding.eval('[__FILE__, __LINE__]')

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end

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if defined?(::SCRIPT_LINES__[file]) && lines = ::SCRIPT_LINES__[file]

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code = ::SCRIPT_LINES__[file].join('')

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else

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begin

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code = File.read(file)

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rescue SystemCallError

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return

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end

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end

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# NOT using #use_colorize? of IRB.conf[:MAIN_CONTEXT] because this method may be called before IRB::Irb#run

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use_colorize = IRB.conf.fetch(:USE_COLORIZE, true)

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if use_colorize

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lines = Color.colorize_code(code).lines

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else

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lines = code.lines

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end

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pos -= 1

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start_pos = [pos - 5, 0].max

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end_pos = [pos + 5, lines.size - 1].min

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if use_colorize

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fmt = " %2s #{Color.colorize("%#{end_pos.to_s.length}d", [:BLUE, :BOLD])}: %s"

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else

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fmt = " %2s %#{end_pos.to_s.length}d: %s"

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end

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body = (start_pos..end_pos).map do |current_pos|

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sprintf(fmt, pos == current_pos ? '=>' : '', current_pos + 1, lines[current_pos])

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end.join("")

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"\nFrom: #{file} @ line #{pos + 1} :\n\n#{body}#{Color.clear}\n"

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end

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def IRB.delete_caller

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end

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end

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end

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