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diff --stat: enable limiting of the graph part

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A new option --stat-graph-width=<width> can be used to limit the width
of the graph part even is more space is available. Up to <width>
columns will be used for the graph.

If commits changing a lot of lines are displayed in a wide terminal
window (200 or more columns), and the +- graph uses the full width,
the output can be hard to comfortably scan with a horizontal movement
of human eyes. Messages wrapped to about 80 columns would be
interspersed with very long +- lines. It makes sense to limit the
width of the graph part to a fixed value (e.g. 70 columns), even if
more columns are available.

Signed-off-by: Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Zbigniew Jędrzejewski-Szmek
2012-03-01 13:26:45 +01:00
committed by Junio C Hamano
parent c4432d5511
commit 969fe57b84
4 changed files with 30 additions and 2 deletions
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23
diff.c
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@ -1375,13 +1375,15 @@ static void show_stats(struct diffstat_t *data, struct diff_options *options)
/*
* We have width = stat_width or term_columns() columns total.
* We want a maximum of min(max_len, stat_name_width) for the name part.
* We want a maximum of min(max_change, stat_graph_width) for the +- part.
* We also need 1 for " " and 4 + decimal_width(max_change)
* for " | NNNN " and one the empty column at the end, altogether
* 6 + decimal_width(max_change).
*
* If there's not enough space, we will use the smaller of
* stat_name_width (if set) and 5/8*width for the filename,
* and the rest for constant elements + graph part.
* and the rest for constant elements + graph part, but no more
* than stat_graph_width for the graph part.
* (5/8 gives 50 for filename and 30 for the constant parts + graph
* for the standard terminal size).
*
@ -1406,7 +1408,9 @@ static void show_stats(struct diffstat_t *data, struct diff_options *options)
/*
* First assign sizes that are wanted, ignoring available width.
*/
graph_width = max_change;
graph_width = (options->stat_graph_width &&
options->stat_graph_width < max_change) ?
options->stat_graph_width : max_change;
name_width = (options->stat_name_width > 0 &&
options->stat_name_width < max_len) ?
options->stat_name_width : max_len;
@ -1417,6 +1421,9 @@ static void show_stats(struct diffstat_t *data, struct diff_options *options)
if (name_width + number_width + 6 + graph_width > width) {
if (graph_width > width * 3/8 - number_width - 6)
graph_width = width * 3/8 - number_width - 6;
if (options->stat_graph_width &&
graph_width > options->stat_graph_width)
graph_width = options->stat_graph_width;
if (name_width > width - number_width - 6 - graph_width)
name_width = width - number_width - 6 - graph_width;
else
@ -3289,6 +3296,7 @@ static int stat_opt(struct diff_options *options, const char **av)
char *end;
int width = options->stat_width;
int name_width = options->stat_name_width;
int graph_width = options->stat_graph_width;
int count = options->stat_count;
int argcount = 1;
@ -3317,6 +3325,16 @@ static int stat_opt(struct diff_options *options, const char **av)
name_width = strtoul(av[1], &end, 10);
argcount = 2;
}
} else if (!prefixcmp(arg, "-graph-width")) {
arg += strlen("-graph-width");
if (*arg == '=')
graph_width = strtoul(arg + 1, &end, 10);
else if (!*arg && !av[1])
die("Option '--stat-graph-width' requires a value");
else if (!*arg) {
graph_width = strtoul(av[1], &end, 10);
argcount = 2;
}
} else if (!prefixcmp(arg, "-count")) {
arg += strlen("-count");
if (*arg == '=')
@ -3342,6 +3360,7 @@ static int stat_opt(struct diff_options *options, const char **av)
return 0;
options->output_format |= DIFF_FORMAT_DIFFSTAT;
options->stat_name_width = name_width;
options->stat_graph_width = graph_width;
options->stat_width = width;
options->stat_count = count;
return argcount;