X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=diff.c;h=1656310ddc54b174be37afb84adf9ce9ca320038;hb=1b058bc30df5f79fe7449cacd8ae7128944327f7;hp=7e154265f778c645192cbf17c65b9bea2a507402;hpb=f2120eb4db3e3e3f9a336eb04fdc2319d7421536;p=git.git diff --git a/diff.c b/diff.c index 7e154265f..1656310dd 100644 --- a/diff.c +++ b/diff.c @@ -1276,13 +1276,15 @@ const char mime_boundary_leader[] = "------------"; static int scale_linear(int it, int width, int max_change) { + if (!it) + return 0; /* - * make sure that at least one '-' is printed if there were deletions, - * and likewise for '+'. + * make sure that at least one '-' or '+' is printed if + * there is any change to this path. The easiest way is to + * scale linearly as if the alloted width is one column shorter + * than it is, and then add 1 to the result. */ - if (max_change < 2) - return it; - return ((it - 1) * (width - 1) + max_change - 1) / (max_change - 1); + return 1 + (it * (width - 1) / max_change); } static void show_name(FILE *file, @@ -1327,7 +1329,7 @@ static void show_stats(struct diffstat_t *data, struct diff_options *options) int i, len, add, del, adds = 0, dels = 0; uintmax_t max_change = 0, max_len = 0; int total_files = data->nr; - int width, name_width, count; + int width, name_width, graph_width, number_width = 4, count; const char *reset, *add_c, *del_c; const char *line_prefix = ""; int extra_shown = 0; @@ -1341,25 +1343,15 @@ static void show_stats(struct diffstat_t *data, struct diff_options *options) line_prefix = msg->buf; } - width = options->stat_width ? options->stat_width : 80; - name_width = options->stat_name_width ? options->stat_name_width : 50; count = options->stat_count ? options->stat_count : data->nr; - /* Sanity: give at least 5 columns to the graph, - * but leave at least 10 columns for the name. - */ - if (width < 25) - width = 25; - if (name_width < 10) - name_width = 10; - else if (width < name_width + 15) - name_width = width - 15; - - /* Find the longest filename and max number of changes */ reset = diff_get_color_opt(options, DIFF_RESET); add_c = diff_get_color_opt(options, DIFF_FILE_NEW); del_c = diff_get_color_opt(options, DIFF_FILE_OLD); + /* + * Find the longest filename and max number of changes + */ for (i = 0; (i < count) && (i < data->nr); i++) { struct diffstat_file *file = data->files[i]; uintmax_t change = file->added + file->deleted; @@ -1380,19 +1372,62 @@ static void show_stats(struct diffstat_t *data, struct diff_options *options) } count = i; /* min(count, data->nr) */ - /* Compute the width of the graph part; - * 10 is for one blank at the beginning of the line plus - * " | count " between the name and the graph. + /* + * 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 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. + * (5/8 gives 50 for filename and 30 for the constant parts + graph + * for the standard terminal size). * - * From here on, name_width is the width of the name area, - * and width is the width of the graph area. + * In other words: stat_width limits the maximum width, and + * stat_name_width fixes the maximum width of the filename, + * and is also used to divide available columns if there + * aren't enough. */ - name_width = (name_width < max_len) ? name_width : max_len; - if (width < (name_width + 10) + max_change) - width = width - (name_width + 10); + + if (options->stat_width == -1) + width = term_columns(); else - width = max_change; + width = options->stat_width ? options->stat_width : 80; + + /* + * Guarantee 3/8*16==6 for the graph part + * and 5/8*16==10 for the filename part + */ + if (width < 16 + 6 + number_width) + width = 16 + 6 + number_width; + /* + * First assign sizes that are wanted, ignoring available width. + */ + graph_width = max_change; + name_width = (options->stat_name_width > 0 && + options->stat_name_width < max_len) ? + options->stat_name_width : max_len; + + /* + * Adjust adjustable widths not to exceed maximum width + */ + 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 (name_width > width - number_width - 6 - graph_width) + name_width = width - number_width - 6 - graph_width; + else + graph_width = width - number_width - 6 - name_width; + } + + /* + * From here name_width is the width of the name area, + * and graph_width is the width of the graph area. + * max_change is used to scale graph properly. + */ for (i = 0; i < count; i++) { const char *prefix = ""; char *name = data->files[i]->print_name; @@ -1448,9 +1483,20 @@ static void show_stats(struct diffstat_t *data, struct diff_options *options) adds += add; dels += del; - if (width <= max_change) { - add = scale_linear(add, width, max_change); - del = scale_linear(del, width, max_change); + if (graph_width <= max_change) { + int total = add + del; + + total = scale_linear(add + del, graph_width, max_change); + if (total < 2 && add && del) + /* width >= 2 due to the sanity check */ + total = 2; + if (add < del) { + add = scale_linear(add, graph_width, max_change); + del = total - add; + } else { + del = scale_linear(del, graph_width, max_change); + add = total - del; + } } fprintf(options->file, "%s", line_prefix); show_name(options->file, prefix, name, len);