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require 'io/console/size'
require 'debug/console'
module IRB
module Debug
class UI < DEBUGGER__::UI_Base
def initialize(irb)
@irb = irb
end
def remote?
false
end
def activate session, on_fork: false
end
def deactivate
end
def width
if (w = IO.console_size[1]) == 0 # for tests PTY
80
else
w
end
end
def quit n
yield
exit n
end
def ask prompt
setup_interrupt do
print prompt
($stdin.gets || '').strip
end
end
def puts str = nil
case str
when Array
str.each{|line|
$stdout.puts line.chomp
}
when String
str.each_line{|line|
$stdout.puts line.chomp
}
when nil
$stdout.puts
end
end
def readline _
setup_interrupt do
tc = DEBUGGER__::SESSION.instance_variable_get(:@tc)
cmd = @irb.debug_readline(tc.current_frame.binding || TOPLEVEL_BINDING)
case cmd
when nil # when user types C-d
"continue"
else
cmd
end
end
end
def setup_interrupt
DEBUGGER__::SESSION.intercept_trap_sigint false do
current_thread = Thread.current # should be session_server thread
prev_handler = trap(:INT){
current_thread.raise Interrupt
}
yield
ensure
trap(:INT, prev_handler)
end
end
def after_fork_parent
parent_pid = Process.pid
at_exit{
DEBUGGER__::SESSION.intercept_trap_sigint_end
trap(:SIGINT, :IGNORE)
if Process.pid == parent_pid
# only check child process from its parent
begin
# wait for all child processes to keep terminal
Process.waitpid
rescue Errno::ESRCH, Errno::ECHILD
end
end
}
end
end
end
end
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