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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999, 2001, 2002, 2005, 2007 Free Software Foundation, Inc.
GNU Mailutils is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GNU Mailutils is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Mailutils; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
MA 02110-1301 USA */
#include "mail.h"
/* Scroll directions */
#define D_BWD -1 /* z- */
#define D_NONE 0 /* z. */
#define D_FWD 1 /* z+ */
/*
* z [+|-|. [count]]
* Optional [count] specifies number of pages to skip before
* displaying from lines. Default is 1.
* . modifier causes command to redisplay the current page, i.e.
* starting from the current message.
*/
static int
z_parse_args(int argc, char **argv,
off_t *return_count, int *return_dir)
{
int count = 1;
int mul = 1;
int dir = D_FWD;
int an = 0;
char *argp = NULL;
argp = &argv[an][1];
if (*argp == 0)
{
an++;
if (an < argc)
argp = argv[an];
}
if (*argp)
{
switch (*argp++)
{
case '+':
break;
case '-':
dir = D_BWD;
break;
case '.':
dir = D_NONE;
break;
default:
util_error (_("Bad arguments for the scrolling command"));
return 1;
}
if (*argp == 0)
{
an++;
if (an < argc)
argp = argv[an];
}
argc -= an;
if (argc > 1)
{
util_error (_("Too many arguments for the scrolling command"));
return 1;
}
if (argp && *argp)
{
if (dir == D_NONE)
{
util_error (_("Argument not applicable for z"));
return 1;
}
if ((mul = strtoul (argp, NULL, 10)) == 0)
{
util_error (_("Bad number of pages"));
return 1;
}
}
}
*return_count = mul * count;
*return_dir = dir;
return 0;
}
int
mail_z (int argc, char **argv)
{
off_t count;
int dir;
unsigned int pagelines = util_screen_lines ();
if (z_parse_args(argc, argv, &count, &dir))
return 1;
count *= pagelines;
switch (dir)
{
case D_BWD:
if (page_move (-count) == 0)
{
fprintf (stdout, _("On first screenful of messages\n"));
return 0;
}
break;
case D_FWD:
if (page_move (count) == 0)
{
fprintf (stdout, _("On last screenful of messages\n"));
return 0;
}
break;
case D_NONE:
{
/* z. is a GNU extension, so it will be more useful
when we reach the last message to show a full screen
of the last message. This behaviour is used on startup
when displaying the summary and the headers, new messages
are last but we want to display a screenful with the
real crs set by summary() to the new message.
FIXME: Basically it's the same as headers now. Do we need
it still? */
break;
}
}
page_do (mail_from0, NULL);
return 0;
}
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