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Re: screen update problem during periodic file "refresh"

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  • Bram Moolenaar
    ... It looks wrong. I ll look into this later. -- Seen on the back of a biker s vest: If you can read this, my wife fell off. /// Bram Moolenaar --
    Message 1 of 6 , Sep 8, 2006
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      Yakov Lerner wrote:

      > > > I see several problems (that I can't explain) in the vim "refresh"-loop
      > > > watching the growing file (a-la 'tail -f'). Vim commands are below.
      > > >
      > > > Problem #1: There is unexpected output on the bottom line
      > > > (lines of the file is echoed on the bottom line). Why
      > > ?
      > > > Problem #2: When you vertically resize the xterm window,
      > > > vim screen is corrupted and never repainted properly.
      > > > Problem #3: Sometimes, when I press Ctrl-C to quit the loop,
      > > > vim is in ex mode and responds 'Type :quit<Enter>
      > > > to exit Vim'
      > > > Why ?
      > > > Problem #4: Since vim repaints properly when waiting for chars, I'd like
      > > > to put getchartimeout(1000) in place of sleep 1. Do we
      > > > have getchar() with timeout ?
      > > >
      > > > To see the demonstration:
      > > >
      > > > 1. In one window, create growing file using these shell command:
      > > >
      > > > % while :; do date >>1; sleep 1; done
      > > >
      > > > 2. In another window:
      > > >
      > > > vim -u NONE ~/xxx
      > > > :set nolz | while 1 | e | redraw | $ | sleep 1 | endw
      > > >
      > > > " notice unexpected output on the bottom line
      > > > " try to resize screen. It is not restored properly.
      > > > " Press Ctrl-C to quit. Sometimes, vim quits the loop
      > > properly.
      > > > " Sometime, vim does not quit the loop, stays in ex mode.
      > > > " (Type :quit<Enter> to exit Vim)
      > > >
      > > > (This command sequence must be not perfect but it demonstrates the
      > > problem).
      > >
      > > I can see the extra output on the bottom line. I'll look into this
      > > later.
      > >
      > > How do you see the problem with the screen resize?
      >
      >
      > Originally, &lines is around 50. Screenshot before resize is
      >
      > http://www.wikiupload.com/download_page.php?id=16428
      > (before-resize.gif). This is normal screen.
      >
      > Here is how I resize: I resize screen height down to 10.
      > Then I resize height back to approximately original height.
      > Here is screenshot after resize
      > (I also give it several seconds of time, but it never really recovers):
      >
      > http://www.wikiupload.com/download_page.php?id=16429
      > (after-resize.gif). It's different every time, but always screwed.

      It looks wrong. I'll look into this later.

      --
      Seen on the back of a biker's vest: If you can read this, my wife fell off.

      /// Bram Moolenaar -- Bram@... -- http://www.Moolenaar.net \\\
      /// sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
      \\\ download, build and distribute -- http://www.A-A-P.org ///
      \\\ help me help AIDS victims -- http://ICCF-Holland.org ///
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