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[ruby/reline] Preserve the input buffer across cursor_pos

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The old version of cursor_pos discards the input buffer, which made IRB
ignore the input immediately after IRB is invoked.

This change keeps the input before cursor_pos by using ungetc.

4a8cca331f
This commit is contained in:
Yusuke Endoh 2019-12-14 15:46:42 +09:00 • committed by aycabta
parent 7fd6077d98
commit ec1de789a9
1 changed files with 5 additions and 1 deletions
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6
lib/reline/ansi.rb
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@ -60,14 +60,18 @@ class Reline::ANSI
def self.cursor_pos def self.cursor_pos
begin begin
res = '' res = ''
m = nil
@@input.raw do |stdin| @@input.raw do |stdin|
@@output << "\e[6n" @@output << "\e[6n"
@@output.flush @@output.flush
while (c = stdin.getc) != 'R' while (c = stdin.getc) != 'R'
res << c if c res << c if c
end end
m = res.match(/\e\[(?<row>\d+);(?<column>\d+)/)
(m.pre_match + m.post_match).chars.reverse_each do |ch|
stdin.ungetc ch
end
end end
m = res.match(/(?<row>\d+);(?<column>\d+)/)
column = m[:column].to_i - 1 column = m[:column].to_i - 1
row = m[:row].to_i - 1 row = m[:row].to_i - 1
rescue Errno::ENOTTY rescue Errno::ENOTTY