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Add a pager_min_lines setting to psql

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If set, the pager will not be used unless this many lines are to be
displayed, even if that is more than the screen depth. Default is zero,
meaning it's disabled.

There is probably more work to be done in giving the user control over
when the pager is used, particularly when wide output forces use of the
pager regardless of how many lines there are, but this is a start.
This commit is contained in:
Andrew Dunstan
2015-03-28 11:07:41 -04:00
parent cfe12763c3
commit 7655f4ccea
9 changed files with 55 additions and 16 deletions
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12
src/bin/psql/help.c
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@ -65,7 +65,7 @@ usage(unsigned short int pager)
}
}
output = PageOutput(59, pager);
output = PageOutput(59, pager ? &(pset.popt.topt) : NULL);
fprintf(output, _("psql is the PostgreSQL interactive terminal.\n\n"));
fprintf(output, _("Usage:\n"));
@ -158,7 +158,7 @@ slashUsage(unsigned short int pager)
currdb = PQdb(pset.db);
output = PageOutput(103, pager);
output = PageOutput(103, pager ? &(pset.popt.topt) : NULL);
/* if you add/remove a line here, change the row count above */
@ -305,7 +305,7 @@ helpVariables(unsigned short int pager)
{
FILE *output;
output = PageOutput(85, pager);
output = PageOutput(85, pager ? &(pset.popt.topt) : NULL);
fprintf(output, _("List of specially treated variables.\n"));
@ -435,7 +435,7 @@ helpSQL(const char *topic, unsigned short int pager)
ncolumns = Max(ncolumns, 1);
nrows = (QL_HELP_COUNT + (ncolumns - 1)) / ncolumns;
output = PageOutput(nrows + 1, pager);
output = PageOutput(nrows + 1, pager ? &(pset.popt.topt) : NULL);
fputs(_("Available help:\n"), output);
@ -488,7 +488,7 @@ helpSQL(const char *topic, unsigned short int pager)
if (wordlen >= len) /* Don't try again if the same word */
{
if (!output)
output = PageOutput(nl_count, pager);
output = PageOutput(nl_count, pager ? &(pset.popt.topt) : NULL);
break;
}
len = wordlen;
@ -509,7 +509,7 @@ helpSQL(const char *topic, unsigned short int pager)
}
if (!output)
output = PageOutput(nl_count, pager);
output = PageOutput(nl_count, pager ? &(pset.popt.topt) : NULL);
for (i = 0; QL_HELP[i].cmd; i++)
{