Andrew's git - gitweb.git/blob

05fa3e361c72d80210d05646c78ebc3a419b92dc
   1#include "cache.h"
   2#include "column.h"
   3#include "string-list.h"
   4#include "parse-options.h"
   5#include "utf8.h"
   6
   7#define XY2LINEAR(d, x, y) (COL_LAYOUT((d)->colopts) == COL_COLUMN ? \
   8                            (x) * (d)->rows + (y) : \
   9                            (y) * (d)->cols + (x))
  10
  11struct column_data {
  12        const struct string_list *list;
  13        unsigned int colopts;
  14        struct column_options opts;
  15
  16        int rows, cols;
  17        int *len;               /* cell length */
  18};
  19
  20/* return length of 's' in letters, ANSI escapes stripped */
  21static int item_length(unsigned int colopts, const char *s)
  22{
  23        int len, i = 0;
  24        struct strbuf str = STRBUF_INIT;
  25
  26        strbuf_addstr(&str, s);
  27        while ((s = strstr(str.buf + i, "\033[")) != NULL) {
  28                int len = strspn(s + 2, "0123456789;");
  29                i = s - str.buf;
  30                strbuf_remove(&str, i, len + 3); /* \033[<len><func char> */
  31        }
  32        len = utf8_strwidth(str.buf);
  33        strbuf_release(&str);
  34        return len;
  35}
  36
  37/*
  38 * Calculate cell width, rows and cols for a table of equal cells, given
  39 * table width and how many spaces between cells.
  40 */
  41static void layout(struct column_data *data, int *width)
  42{
  43        int i;
  44
  45        *width = 0;
  46        for (i = 0; i < data->list->nr; i++)
  47                if (*width < data->len[i])
  48                        *width = data->len[i];
  49
  50        *width += data->opts.padding;
  51
  52        data->cols = (data->opts.width - strlen(data->opts.indent)) / *width;
  53        if (data->cols == 0)
  54                data->cols = 1;
  55
  56        data->rows = DIV_ROUND_UP(data->list->nr, data->cols);
  57}
  58
  59/* Display without layout when not enabled */
  60static void display_plain(const struct string_list *list,
  61                          const char *indent, const char *nl)
  62{
  63        int i;
  64
  65        for (i = 0; i < list->nr; i++)
  66                printf("%s%s%s", indent, list->items[i].string, nl);
  67}
  68
  69/* Print a cell to stdout with all necessary leading/traling space */
  70static int display_cell(struct column_data *data, int initial_width,
  71                        const char *empty_cell, int x, int y)
  72{
  73        int i, len, newline;
  74
  75        i = XY2LINEAR(data, x, y);
  76        if (i >= data->list->nr)
  77                return -1;
  78        len = data->len[i];
  79        if (COL_LAYOUT(data->colopts) == COL_COLUMN)
  80                newline = i + data->rows >= data->list->nr;
  81        else
  82                newline = x == data->cols - 1 || i == data->list->nr - 1;
  83
  84        printf("%s%s%s",
  85               x == 0 ? data->opts.indent : "",
  86               data->list->items[i].string,
  87               newline ? data->opts.nl : empty_cell + len);
  88        return 0;
  89}
  90
  91/* Display COL_COLUMN or COL_ROW */
  92static void display_table(const struct string_list *list,
  93                          unsigned int colopts,
  94                          const struct column_options *opts)
  95{
  96        struct column_data data;
  97        int x, y, i, initial_width;
  98        char *empty_cell;
  99
 100        memset(&data, 0, sizeof(data));
 101        data.list = list;
 102        data.colopts = colopts;
 103        data.opts = *opts;
 104
 105        data.len = xmalloc(sizeof(*data.len) * list->nr);
 106        for (i = 0; i < list->nr; i++)
 107                data.len[i] = item_length(colopts, list->items[i].string);
 108
 109        layout(&data, &initial_width);
 110
 111        empty_cell = xmalloc(initial_width + 1);
 112        memset(empty_cell, ' ', initial_width);
 113        empty_cell[initial_width] = '\0';
 114        for (y = 0; y < data.rows; y++) {
 115                for (x = 0; x < data.cols; x++)
 116                        if (display_cell(&data, initial_width, empty_cell, x, y))
 117                                break;
 118        }
 119
 120        free(data.len);
 121        free(empty_cell);
 122}
 123
 124void print_columns(const struct string_list *list, unsigned int colopts,
 125                   const struct column_options *opts)
 126{
 127        struct column_options nopts;
 128
 129        if (!list->nr)
 130                return;
 131        assert((colopts & COL_ENABLE_MASK) != COL_AUTO);
 132
 133        memset(&nopts, 0, sizeof(nopts));
 134        nopts.indent = opts && opts->indent ? opts->indent : "";
 135        nopts.nl = opts && opts->nl ? opts->nl : "\n";
 136        nopts.padding = opts ? opts->padding : 1;
 137        nopts.width = opts && opts->width ? opts->width : term_columns() - 1;
 138        if (!column_active(colopts)) {
 139                display_plain(list, "", "\n");
 140                return;
 141        }
 142        switch (COL_LAYOUT(colopts)) {
 143        case COL_PLAIN:
 144                display_plain(list, nopts.indent, nopts.nl);
 145                break;
 146        case COL_ROW:
 147        case COL_COLUMN:
 148                display_table(list, colopts, &nopts);
 149                break;
 150        default:
 151                die("BUG: invalid layout mode %d", COL_LAYOUT(colopts));
 152        }
 153}
 154
 155int finalize_colopts(unsigned int *colopts, int stdout_is_tty)
 156{
 157        if ((*colopts & COL_ENABLE_MASK) == COL_AUTO) {
 158                if (stdout_is_tty < 0)
 159                        stdout_is_tty = isatty(1);
 160                *colopts &= ~COL_ENABLE_MASK;
 161                if (stdout_is_tty)
 162                        *colopts |= COL_ENABLED;
 163        }
 164        return 0;
 165}
 166
 167struct colopt {
 168        const char *name;
 169        unsigned int value;
 170        unsigned int mask;
 171};
 172
 173#define LAYOUT_SET 1
 174#define ENABLE_SET 2
 175
 176static int parse_option(const char *arg, int len, unsigned int *colopts,
 177                        int *group_set)
 178{
 179        struct colopt opts[] = {
 180                { "always", COL_ENABLED,  COL_ENABLE_MASK },
 181                { "never",  COL_DISABLED, COL_ENABLE_MASK },
 182                { "auto",   COL_AUTO,     COL_ENABLE_MASK },
 183                { "plain",  COL_PLAIN,    COL_LAYOUT_MASK },
 184                { "column", COL_COLUMN,   COL_LAYOUT_MASK },
 185                { "row",    COL_ROW,      COL_LAYOUT_MASK },
 186        };
 187        int i;
 188
 189        for (i = 0; i < ARRAY_SIZE(opts); i++) {
 190                int arg_len = len, name_len;
 191                const char *arg_str = arg;
 192
 193                name_len = strlen(opts[i].name);
 194                if (arg_len != name_len ||
 195                    strncmp(arg_str, opts[i].name, name_len))
 196                        continue;
 197
 198                switch (opts[i].mask) {
 199                case COL_ENABLE_MASK:
 200                        *group_set |= ENABLE_SET;
 201                        break;
 202                case COL_LAYOUT_MASK:
 203                        *group_set |= LAYOUT_SET;
 204                        break;
 205                }
 206
 207                if (opts[i].mask)
 208                        *colopts = (*colopts & ~opts[i].mask) | opts[i].value;
 209                return 0;
 210        }
 211
 212        return error("unsupported option '%s'", arg);
 213}
 214
 215static int parse_config(unsigned int *colopts, const char *value)
 216{
 217        const char *sep = " ,";
 218        int group_set = 0;
 219
 220        while (*value) {
 221                int len = strcspn(value, sep);
 222                if (len) {
 223                        if (parse_option(value, len, colopts, &group_set))
 224                                return -1;
 225
 226                        value += len;
 227                }
 228                value += strspn(value, sep);
 229        }
 230        /*
 231         * Setting layout implies "always" if neither always, never
 232         * nor auto is specified.
 233         *
 234         * Current value in COL_ENABLE_MASK is disregarded. This means if
 235         * you set column.ui = auto and pass --column=row, then "auto"
 236         * will become "always".
 237         */
 238        if ((group_set & LAYOUT_SET) && !(group_set & ENABLE_SET))
 239                *colopts = (*colopts & ~COL_ENABLE_MASK) | COL_ENABLED;
 240        return 0;
 241}
 242
 243static int column_config(const char *var, const char *value,
 244                         const char *key, unsigned int *colopts)
 245{
 246        if (!value)
 247                return config_error_nonbool(var);
 248        if (parse_config(colopts, value))
 249                return error("invalid column.%s mode %s", key, value);
 250        return 0;
 251}
 252
 253int git_column_config(const char *var, const char *value,
 254                      const char *command, unsigned int *colopts)
 255{
 256        const char *it = skip_prefix(var, "column.");
 257        if (!it)
 258                return 0;
 259
 260        if (!strcmp(it, "ui"))
 261                return column_config(var, value, "ui", colopts);
 262
 263        if (command && !strcmp(it, command))
 264                return column_config(var, value, it, colopts);
 265
 266        return 0;
 267}
 268
 269int parseopt_column_callback(const struct option *opt,
 270                             const char *arg, int unset)
 271{
 272        unsigned int *colopts = opt->value;
 273        *colopts |= COL_PARSEOPT;
 274        *colopts &= ~COL_ENABLE_MASK;
 275        if (unset)              /* --no-column == never */
 276                return 0;
 277        /* --column == always unless "arg" states otherwise */
 278        *colopts |= COL_ENABLED;
 279        if (arg)
 280                return parse_config(colopts, arg);
 281
 282        return 0;
 283}