fuzzymatch patch applyed

Keep track of the amount of items (not a total buffer size), allocate an array of
new items. For now change BUFSIZ bytes to 256 * sizeof(struct item)).

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"

config.h

@@ -0,0 +1,24 @@
+/* See LICENSE file for copyright and license details. */
+/* 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"
+};
+static const char *prompt      = NULL;      /* -p  option; prompt to the left of input field */
+static const char *colors[SchemeLast][2] = {
+	/*     fg         bg       */
+	[SchemeNorm] = { "#bbbbbb", "#222222" },
+	[SchemeSel] = { "#eeeeee", "#005577" },
+	[SchemeOut] = { "#000000", "#00ffff" },
+};
+/* -l option; if nonzero, dmenu uses vertical list with given number of lines */
+static unsigned int lines      = 0;
+
+/*
+ * Characters not considered part of a word while deleting words
+ * for example: " /?\"&[]"
+ */
+static const char worddelimiters[] = " ";

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)

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>
@@ -32,6 +33,7 @@ struct item {
 	char *text;
 	struct item *left, *right;
 	int out;
+	double distance;
 };
 
 static char text[BUFSIZ] = "";
@@ -227,9 +229,94 @@ 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;
 
@@ -550,19 +637,23 @@ static void
 readstdin(void)
 {
 	char *line = NULL;
-	size_t i, junk, size = 0;
+	size_t i, junk, itemsiz = 0;
 	ssize_t len;
 
 	/* read each line from stdin and add it to the item list */
-	for (i = 0; (len = getline(&line, &junk, stdin)) != -1; i++, line = NULL) {
-		if (i + 1 >= size / sizeof *items)
-			if (!(items = realloc(items, (size += BUFSIZ))))
-				die("cannot realloc %zu bytes:", size);
+	for (i = 0; (len = getline(&line, &junk, stdin)) != -1; i++) {
+		if (i + 1 >= itemsiz) {
+			itemsiz += 256;
+			if (!(items = realloc(items, itemsiz * sizeof(*items))))
+				die("cannot realloc %zu bytes:", itemsiz * sizeof(*items));
+		}
 		if (line[len - 1] == '\n')
 			line[len - 1] = '\0';
 		items[i].text = line;
 		items[i].out = 0;
+		line = NULL; /* next call of getline() allocates a new line */
 	}
+	free(line);
 	if (items)
 		items[i].text = NULL;
 	lines = MIN(lines, i);
@@ -729,6 +820,8 @@ 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;

patches/dmenu-fuzzyhighlight-4.9.diff

@@ -0,0 +1,152 @@
+Author: Chris Noxz <chris@noxz.tech>
+note: This patch is meant to be used together with fuzzymatch
+
+diff -upN dmenu-4.9/config.def.h dmenu-4.9-fuzzyhighlight/config.def.h
+--- dmenu-4.9/config.def.h	2019-02-02 13:55:02.000000000 +0100
++++ dmenu-4.9-fuzzyhighlight/config.def.h	2020-04-04 10:26:36.990890854 +0200
+@@ -11,6 +11,8 @@ static const char *colors[SchemeLast][2]
+ 	/*     fg         bg       */
+ 	[SchemeNorm] = { "#bbbbbb", "#222222" },
+ 	[SchemeSel] = { "#eeeeee", "#005577" },
++	[SchemeSelHighlight] = { "#ffc978", "#005577" },
++	[SchemeNormHighlight] = { "#ffc978", "#222222" },
+ 	[SchemeOut] = { "#000000", "#00ffff" },
+ };
+ /* -l option; if nonzero, dmenu uses vertical list with given number of lines */
+diff -upN dmenu-4.9/dmenu.1 dmenu-4.9-fuzzyhighlight/dmenu.1
+--- dmenu-4.9/dmenu.1	2019-02-02 13:55:02.000000000 +0100
++++ dmenu-4.9-fuzzyhighlight/dmenu.1	2020-04-04 10:30:16.430054933 +0200
+@@ -20,6 +20,14 @@ dmenu \- dynamic menu
+ .IR color ]
+ .RB [ \-sf
+ .IR color ]
++.RB [ \-nhb
++.IR color ]
++.RB [ \-nhf
++.IR color ]
++.RB [ \-shb
++.IR color ]
++.RB [ \-shf
++.IR color ]
+ .RB [ \-w
+ .IR windowid ]
+ .P
+@@ -75,6 +83,18 @@ defines the selected background color.
+ .BI \-sf " color"
+ defines the selected foreground color.
+ .TP
++.BI \-nhb " color"
++defines the normal highlight background color.
++.TP
++.BI \-nhf " color"
++defines the normal highlight foreground color.
++.TP
++.BI \-shb " color"
++defines the selected highlight background color.
++.TP
++.BI \-shf " color"
++defines the selected highlight foreground color.
++.TP
+ .B \-v
+ prints version information to stdout, then exits.
+ .TP
+diff -upN dmenu-4.9/dmenu.c dmenu-4.9-fuzzyhighlight/dmenu.c
+--- dmenu-4.9/dmenu.c	2019-02-02 13:55:02.000000000 +0100
++++ dmenu-4.9-fuzzyhighlight/dmenu.c	2020-04-04 10:27:43.888026309 +0200
+@@ -26,7 +26,9 @@
+ #define TEXTW(X)              (drw_fontset_getwidth(drw, (X)) + lrpad)
+ 
+ /* enums */
+-enum { SchemeNorm, SchemeSel, SchemeOut, SchemeLast }; /* color schemes */
++enum { SchemeNorm, SchemeSel, SchemeNormHighlight, SchemeSelHighlight,
++       SchemeOut, SchemeLast }; /* color schemes */
++
+ 
+ struct item {
+ 	char *text;
+@@ -113,9 +115,49 @@ cistrstr(const char *s, const char *sub)
+ 	return NULL;
+ }
+ 
++static void
++drawhighlights(struct item *item, int x, int y, int maxw)
++{
++	int i, indent;
++	char *highlight;
++	char c;
++
++	if (!(strlen(item->text) && strlen(text)))
++		return;
++
++	drw_setscheme(drw, scheme[item == sel
++	                   ? SchemeSelHighlight
++	                   : SchemeNormHighlight]);
++	for (i = 0, highlight = item->text; *highlight && text[i];) {
++		if (*highlight == text[i]) {
++			/* get indentation */
++			c = *highlight;
++			*highlight = '\0';
++			indent = TEXTW(item->text);
++			*highlight = c;
++
++			/* highlight character */
++			c = highlight[1];
++			highlight[1] = '\0';
++			drw_text(
++				drw,
++				x + indent - (lrpad / 2),
++				y,
++				MIN(maxw - indent, TEXTW(highlight) - lrpad),
++				bh, 0, highlight, 0
++			);
++			highlight[1] = c;
++			i++;
++		}
++		highlight++;
++	}
++}
++
++
+ static int
+ drawitem(struct item *item, int x, int y, int w)
+ {
++	int r;
+ 	if (item == sel)
+ 		drw_setscheme(drw, scheme[SchemeSel]);
+ 	else if (item->out)
+@@ -123,7 +165,9 @@ drawitem(struct item *item, int x, int y
+ 	else
+ 		drw_setscheme(drw, scheme[SchemeNorm]);
+ 
+-	return drw_text(drw, x, y, w, bh, lrpad / 2, item->text, 0);
++	r = drw_text(drw, x, y, w, bh, lrpad / 2, item->text, 0);
++	drawhighlights(item, x, y, w);
++	return r;
+ }
+ 
+ static void
+@@ -683,7 +727,8 @@ static void
+ usage(void)
+ {
+ 	fputs("usage: dmenu [-bfiv] [-l lines] [-p prompt] [-fn font] [-m monitor]\n"
+-	      "             [-nb color] [-nf color] [-sb color] [-sf color] [-w windowid]\n", stderr);
++	      "             [-nb color] [-nf color] [-sb color] [-sf color]\n"
++	      "             [-nhb color] [-nhf color] [-shb color] [-shf color] [-w windowid]\n", stderr);
+ 	exit(1);
+ }
+ 
+@@ -724,6 +769,14 @@ main(int argc, char *argv[])
+ 			colors[SchemeSel][ColBg] = argv[++i];
+ 		else if (!strcmp(argv[i], "-sf"))  /* selected foreground color */
+ 			colors[SchemeSel][ColFg] = argv[++i];
++		else if (!strcmp(argv[i], "-nhb")) /* normal hi background color */
++			colors[SchemeNormHighlight][ColBg] = argv[++i];
++		else if (!strcmp(argv[i], "-nhf")) /* normal hi foreground color */
++			colors[SchemeNormHighlight][ColFg] = argv[++i];
++		else if (!strcmp(argv[i], "-shb")) /* selected hi background color */
++			colors[SchemeSelHighlight][ColBg] = argv[++i];
++		else if (!strcmp(argv[i], "-shf")) /* selected hi foreground color */
++			colors[SchemeSelHighlight][ColFg] = argv[++i];
+ 		else if (!strcmp(argv[i], "-w"))   /* embedding window id */
+ 			embed = argv[++i];
+ 		else

patches/dmenu-fuzzymatch-4.9.diff

@@ -0,0 +1,163 @@
+From 94353eb52055927d9079f3d9e33da1c954abf386 Mon Sep 17 00:00:00 2001
+From: aleks <aleks.stier@icloud.com>
+Date: Wed, 26 Jun 2019 13:25:10 +0200
+Subject: [PATCH] Add support for fuzzy-matching
+
+---
+ config.def.h |  1 +
+ config.mk    |  2 +-
+ dmenu.c      | 89 ++++++++++++++++++++++++++++++++++++++++++++++++++++
+ 3 files changed, 91 insertions(+), 1 deletion(-)
+
+diff --git a/config.def.h b/config.def.h
+index 1edb647..51612b9 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 0929b4a..d14309a 100644
+--- a/config.mk
++++ b/config.mk
+@@ -20,7 +20,7 @@ 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.c b/dmenu.c
+index 6b8f51b..96ddc98 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>
+@@ -32,6 +33,7 @@ struct item {
+ 	char *text;
+ 	struct item *left, *right;
+ 	int out;
++	double distance;
+ };
+ 
+ static char text[BUFSIZ] = "";
+@@ -210,9 +212,94 @@ 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;
+ 
+@@ -702,6 +789,8 @@ 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;
+-- 
+2.22.0
+