5 files changed, 92 insertions, 2 deletions

diff --git a/config.h b/config.h
index 697d511..5893d0b 100644
--- a/config.h
+++ b/config.h
@@ -3,6 +3,7 @@
 
 static int topbar = 1;                      /* -b  option; if 0, dmenu appears at bottom     */
 static const unsigned int alpha = 0xf0;
+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 566348b..fd0b2c3 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 -lXrender
 
 # flags
 CPPFLAGS = -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_XOPEN_SOURCE=700 -D_POSIX_C_SOURCE=200809L -DVERSION=\"$(VERSION)\" $(XINERAMAFLAGS)
diff --git a/dmenu b/dmenu
new file mode 100755
index 0000000..63f1aea
--- /dev/null
+++ b/dmenu
diff --git a/dmenu.c b/dmenu.c
index ab2d29a..9cfb1c4 100644
--- a/dmenu.c
+++ b/dmenu.c
@@ -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;
         struct item *left, *right;
         int out;
+        double distance;
 };
 
 static char text[BUFSIZ] = "";
@@ -236,9 +238,94 @@ 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;
 
@@ -692,7 +779,7 @@ setup(void)
         swa.border_pixel = 0;
         swa.colormap = cmap;
         swa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
-        win = XCreateWindow(dpy, parentwin, x, y, mw, mh, border_width,
+        win = XCreateWindow(dpy, parentwin, x, y, mw, mh, 0,
                             depth, CopyFromParent, visual,
                             CWOverrideRedirect | CWBackPixel | CWBorderPixel | CWColormap | CWEventMask, &swa);
         XSetClassHint(dpy, win, &ch);
@@ -741,6 +828,8 @@ 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"))   /* grabs keyboard before reading stdin */
+                        fuzzy = 0;
                 else if (!strcmp(argv[i], "-i")) { /* case-insensitive item matching */
                         fstrncmp = strncasecmp;
                         fstrstr = cistrstr;
diff --git a/stest b/stest
new file mode 100755
index 0000000..d2d6ca3
--- /dev/null
+++ b/stest