From d166c2c90f777f5a80f628d493cdcf7bf03034b8 Mon Sep 17 00:00:00 2001 From: Justinas Grigas Date: Mon, 17 Jun 2024 02:52:15 +0100 Subject: [PATCH] fuzzymatch: Add support for fuzzy-matching This version of the patch updates the manpage. --- config.def.h | 1 + config.mk | 2 +- dmenu.1 | 5 ++- dmenu.c | 90 +++++++++++++++++++++++++++++++++++++++++++++++++++- 4 files changed, 95 insertions(+), 3 deletions(-) diff --git a/config.def.h b/config.def.h index 1edb647..a4e6174 100644 --- a/config.def.h +++ b/config.def.h @@ -2,6 +2,7 @@ /* Default settings; can be overriden by command line. */ static int topbar = 1; /* -b option; if 0, dmenu appears at bottom */ +static int fuzzy = 1; /* -F option; if 0, dmenu doesn't use fuzzy matching */ /* -fn option overrides fonts[0]; default X11 font or font set */ static const char *fonts[] = { "monospace:size=10" diff --git a/config.mk b/config.mk index 137f7c8..6a19175 100644 --- a/config.mk +++ b/config.mk @@ -21,7 +21,7 @@ FREETYPEINC = /usr/include/freetype2 # includes and libs INCS = -I$(X11INC) -I$(FREETYPEINC) -LIBS = -L$(X11LIB) -lX11 $(XINERAMALIBS) $(FREETYPELIBS) +LIBS = -L$(X11LIB) -lX11 $(XINERAMALIBS) $(FREETYPELIBS) -lm # flags CPPFLAGS = -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_XOPEN_SOURCE=700 -D_POSIX_C_SOURCE=200809L -DVERSION=\"$(VERSION)\" $(XINERAMAFLAGS) diff --git a/dmenu.1 b/dmenu.1 index 323f93c..e2c5ef4 100644 --- a/dmenu.1 +++ b/dmenu.1 @@ -3,7 +3,7 @@ dmenu \- dynamic menu .SH SYNOPSIS .B dmenu -.RB [ \-bfiv ] +.RB [ \-bFfiv ] .RB [ \-l .IR lines ] .RB [ \-m @@ -40,6 +40,9 @@ which lists programs in the user's $PATH and runs the result in their $SHELL. .B \-b dmenu appears at the bottom of the screen. .TP +.B \-F +disables fuzzy matching. +.TP .B \-f dmenu grabs the keyboard before reading stdin if not reading from a tty. This is faster, but will lock up X until stdin reaches end\-of\-file. diff --git a/dmenu.c b/dmenu.c index 40f93e0..03e1f45 100644 --- a/dmenu.c +++ b/dmenu.c @@ -1,6 +1,7 @@ /* See LICENSE file for copyright and license details. */ #include #include +#include #include #include #include @@ -31,6 +32,7 @@ struct item { char *text; struct item *left, *right; int out; + double distance; }; static char text[BUFSIZ] = ""; @@ -226,9 +228,93 @@ 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; @@ -715,7 +801,7 @@ setup(void) static void usage(void) { - die("usage: dmenu [-bfiv] [-l lines] [-p prompt] [-fn font] [-m monitor]\n" + die("usage: dmenu [-bFfiv] [-l lines] [-p prompt] [-fn font] [-m monitor]\n" " [-nb color] [-nf color] [-sb color] [-sf color] [-w windowid]"); } @@ -732,6 +818,8 @@ main(int argc, char *argv[]) exit(0); } else if (!strcmp(argv[i], "-b")) /* appears at the bottom of the screen */ topbar = 0; + else if (!strcmp(argv[i], "-F")) /* disables fuzzy matching */ + fuzzy = 0; else if (!strcmp(argv[i], "-f")) /* grabs keyboard before reading stdin */ fast = 1; else if (!strcmp(argv[i], "-i")) { /* case-insensitive item matching */ -- 2.45.2