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Check respond_to?(:winsize) (fix #549)

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Ryan Fitzgerald 2012-04-24 22:45:22 -07:00
parent 037b382b11
commit 00f7877b0f
1 changed files with 6 additions and 10 deletions
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16
lib/pry/indent.rb
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@ -1,12 +1,10 @@
require 'coderay'
class Pry
# Load io-console if possible, so that we can use $stdout.winsize.
begin
require 'io/console'
rescue LoadError
IO_CONSOLE_AVAILABLE = false
else
IO_CONSOLE_AVAILABLE = true
end
##
@ -292,19 +290,18 @@ class Pry
# @return [String]
def correct_indentation(prompt, code, overhang=0)
full_line = prompt + code
if IO_CONSOLE_AVAILABLE && $stdout.tty?
whitespace = ' ' * overhang
if $stdout.tty? && $stdout.respond_to?(:winsize)
_, cols = $stdout.winsize
lines = full_line.length / cols + 1
elsif Readline.respond_to?(:get_screen_size)
_, cols = Readline.get_screen_size
lines = full_line.length / cols + 1
elsif ENV['COLUMNS'] && ENV['COLUMNS'] != ''
cols = ENV['COLUMNS'].to_i
lines = full_line.length / cols + 1
else
lines = 1
end
lines = cols ? (full_line.length / cols + 1) : 1
if defined?(Win32::Console)
move_up = "\e[#{lines}F"
move_down = "\e[#{lines}E"
@ -312,7 +309,6 @@ class Pry
move_up = "\e[#{lines}A\e[0G"
move_down = "\e[#{lines}B\e[0G"
end
whitespace = ' ' * overhang
"#{move_up}#{prompt}#{colorize_code(code)}#{whitespace}#{move_down}"
end