зеркало из https://github.com/github/ruby.git
92 строки
1.1 KiB
Ruby
92 строки
1.1 KiB
Ruby
#!/usr/local/bin/ruby
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require "curses"
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include Curses
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#
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# main
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#
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if ARGV.size != 1 then
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printf("usage: view file\n");
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exit
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end
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begin
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fp = open(ARGV[0], "r")
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rescue
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raise "cannot open file: #{ARGV[1]}"
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end
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# signal(SIGINT, finish)
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init_screen
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#keypad(stdscr, TRUE)
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nonl
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cbreak
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noecho
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#scrollok(stdscr, TRUE)
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# slurp the file
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data_lines = []
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fp.each_line { |l|
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data_lines.push(l)
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}
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fp.close
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lptr = 0
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while TRUE
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i = 0
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while i < lines
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setpos(i, 0)
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#clrtoeol
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addstr(data_lines[lptr + i]) #if data_lines[lptr + i]
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i += 1
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end
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refresh
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explicit = FALSE
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n = 0
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while TRUE
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c = getch.chr
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if c =~ "[0-9]" then
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n = 10 * n + c.to_i
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else
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break
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end
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end
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n = 1 if !explicit && n == 0
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case c
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when "n" #when KEY_DOWN
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i = 0
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while i < n
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if lptr + lines < data_lines.size then
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lptr += 1
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else
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break
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end
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i += 1
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end
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#wscrl(i)
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when "p" #when KEY_UP
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i = 0
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while i < n
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if lptr > 0 then
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lptr -= 1
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else
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break
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end
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i += 1
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end
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#wscrl(-i)
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when "q"
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break
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end
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end
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close_screen
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