diff options
Diffstat (limited to 'ext/curses/view.rb')
-rw-r--r-- | ext/curses/view.rb | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/ext/curses/view.rb b/ext/curses/view.rb new file mode 100644 index 0000000000..e59a74ed44 --- /dev/null +++ b/ext/curses/view.rb @@ -0,0 +1,90 @@ +#!/usr/local/bin/ruby + +require "curses" +include Curses + +# +# main +# + +if ARGV.size != 1 then + printf("usage: view file\n"); + exit +end +begin + fp = open(ARGV[0], "r") +rescue + raise "cannot open file: #{ARGV[1]}" +end + +# signal(SIGINT, finish) + +init_screen +#keypad(stdscr, TRUE) +nonl +cbreak +noecho +#scrollok(stdscr, TRUE) + +# slurp the file +data_lines = [] +fp.each_line { |l| + data_lines.push(l) +} +fp.close + + +lptr = 0 +while TRUE + i = 0 + while i < lines + setpos(i, 0) + #clrtoeol + addstr(data_lines[lptr + i]) #if data_lines[lptr + i] + i += 1 + end + + explicit = FALSE + n = 0 + while TRUE + c = getch.chr + if c =~ "[0-9]" then + n = 10 * n + c.to_i + else + break + end + end + + n = 1 if !explicit && n == 0 + + case c + when "n" #when KEY_DOWN + i = 0 + while i < n + if lptr + lines < data_lines.size then + lptr += 1 + else + break + end + i += 1 + end + #wscrl(i) + + when "p" #when KEY_UP + i = 0 + while i < n + if lptr > 0 then + lptr -= 1 + else + break + end + i += 1 + end + #wscrl(-i) + + when "q" + break + end + +end +close_screen |