diff options
Diffstat (limited to 'dmenu.c')
| -rw-r--r-- | dmenu.c | 89 |
1 files changed, 89 insertions, 0 deletions
@@ -1,6 +1,7 @@ /* See LICENSE file for copyright and license details. */ #include <ctype.h> #include <locale.h> +#include <math.h> #include <stdio.h> #include <stdlib.h> #include <string.h> @@ -35,6 +36,7 @@ struct item { char *text_output; struct item *left, *right; int out; + double distance; }; static char text[BUFSIZ] = ""; @@ -281,9 +283,94 @@ grabkeyboard(void) die("cannot grab keyboard"); } +int +compare_distance(const void *a, const void *b) +{ + struct item *da = *(struct item **) a; + struct item *db = *(struct item **) b; + + if (!db) + return 1; + if (!da) + return -1; + + return da->distance == db->distance ? 0 : da->distance < db->distance ? -1 : 1; +} + +void +fuzzymatch(void) +{ + /* bang - we have so much memory */ + struct item *it; + struct item **fuzzymatches = NULL; + char c; + int number_of_matches = 0, i, pidx, sidx, eidx; + int text_len = strlen(text), itext_len; + + matches = matchend = NULL; + + /* walk through all items */ + for (it = items; it && it->text; it++) { + if (text_len) { + itext_len = strlen(it->text); + pidx = 0; /* pointer */ + sidx = eidx = -1; /* start of match, end of match */ + /* walk through item text */ + for (i = 0; i < itext_len && (c = it->text[i]); i++) { + /* fuzzy match pattern */ + if (!fstrncmp(&text[pidx], &c, 1)) { + if(sidx == -1) + sidx = i; + pidx++; + if (pidx == text_len) { + eidx = i; + break; + } + } + } + /* build list of matches */ + if (eidx != -1) { + /* compute distance */ + /* add penalty if match starts late (log(sidx+2)) + * add penalty for long a match without many matching characters */ + it->distance = log(sidx + 2) + (double)(eidx - sidx - text_len); + /* fprintf(stderr, "distance %s %f\n", it->text, it->distance); */ + appenditem(it, &matches, &matchend); + number_of_matches++; + } + } else { + appenditem(it, &matches, &matchend); + } + } + + if (number_of_matches) { + /* initialize array with matches */ + if (!(fuzzymatches = realloc(fuzzymatches, number_of_matches * sizeof(struct item*)))) + die("cannot realloc %u bytes:", number_of_matches * sizeof(struct item*)); + for (i = 0, it = matches; it && i < number_of_matches; i++, it = it->right) { + fuzzymatches[i] = it; + } + /* sort matches according to distance */ + qsort(fuzzymatches, number_of_matches, sizeof(struct item*), compare_distance); + /* rebuild list of matches */ + matches = matchend = NULL; + for (i = 0, it = fuzzymatches[i]; i < number_of_matches && it && \ + it->text; i++, it = fuzzymatches[i]) { + appenditem(it, &matches, &matchend); + } + free(fuzzymatches); + } + curr = sel = matches; + calcoffsets(); +} + static void match(void) { + if (fuzzy) { + fuzzymatch(); + return; + } static char **tokv = NULL; static int tokn = 0; @@ -815,6 +902,8 @@ main(int argc, char *argv[]) topbar = 0; else if (!strcmp(argv[i], "-f")) /* grabs keyboard before reading stdin */ fast = 1; + else if (!strcmp(argv[i], "-F")) /* toggles fuzzy matching */ + fuzzy = fuzzy ? 0 : 1; else if (!strcmp(argv[i], "-c")) /* centers dmenu on screen */ centered = 1; else if (!strcmp(argv[i], "-i")) { /* case-insensitive item matching */ |