Xinqi Bao's Git

patch: fuzzymatch
[dmenu.git] / dmenu.c
diff --git a/dmenu.c b/dmenu.c
index 35ce141..1341c3b 100644 (file)
--- 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>
@@ -10,6 +11,7 @@
 
 #include <X11/Xlib.h>
 #include <X11/Xatom.h>
+#include <X11/Xproto.h>
 #include <X11/Xutil.h>
 #ifdef XINERAMA
 #include <X11/extensions/Xinerama.h>
@@ -25,6 +27,8 @@
 #define LENGTH(X)             (sizeof X / sizeof X[0])
 #define TEXTW(X)              (drw_fontset_getwidth(drw, (X)) + lrpad)
 
+#define OPAQUE                0xffU
+
 /* enums */
 enum { SchemeNorm, SchemeSel, SchemeOut, SchemeLast }; /* color schemes */
 
@@ -32,6 +36,7 @@ struct item {
        char *text;
        struct item *left, *right;
        int out;
+       double distance;
 };
 
 static char text[BUFSIZ] = "";
@@ -53,10 +58,16 @@ static XIC xic;
 static Drw *drw;
 static Clr *scheme[SchemeLast];
 
+static int useargb = 0;
+static Visual *visual;
+static int depth;
+static Colormap cmap;
+
 #include "config.h"
 
 static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
 static char *(*fstrstr)(const char *, const char *) = strstr;
+static void xinitvisual();
 
 static unsigned int
 textw_clamp(const char *str, unsigned int n)
@@ -236,9 +247,94 @@ 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;
 
@@ -633,7 +729,7 @@ setup(void)
 #endif
        /* init appearance */
        for (j = 0; j < SchemeLast; j++)
-               scheme[j] = drw_scm_create(drw, colors[j], 2);
+               scheme[j] = drw_scm_create(drw, colors[j], alphas[j], 2);
 
        clip = XInternAtom(dpy, "CLIPBOARD",   False);
        utf8 = XInternAtom(dpy, "UTF8_STRING", False);
@@ -707,11 +803,13 @@ setup(void)
 
        /* create menu window */
        swa.override_redirect = True;
-       swa.background_pixel = scheme[SchemeNorm][ColBg].pixel;
+       swa.background_pixel = 0;
+       swa.border_pixel = 0;
+       swa.colormap = cmap;
        swa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
        win = XCreateWindow(dpy, parentwin, x, y, mw, mh, 0,
-                           CopyFromParent, CopyFromParent, CopyFromParent,
-                           CWOverrideRedirect | CWBackPixel | CWEventMask, &swa);
+                           depth, CopyFromParent, visual,
+                           CWOverrideRedirect | CWBackPixel | CWBorderPixel | CWColormap | CWEventMask, &swa);
        XSetClassHint(dpy, win, &ch);
 
 
@@ -759,6 +857,8 @@ 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 */
+                       /* always fuzzy */; // fuzzy = 0;
                else if (!strcmp(argv[i], "-c"))   /* centers dmenu on screen */
                        centered = 1;
                else if (!strcmp(argv[i], "-i")) { /* case-insensitive item matching */
@@ -799,7 +899,8 @@ main(int argc, char *argv[])
        if (!XGetWindowAttributes(dpy, parentwin, &wa))
                die("could not get embedding window attributes: 0x%lx",
                    parentwin);
-       drw = drw_create(dpy, screen, root, wa.width, wa.height);
+       xinitvisual();
+       drw = drw_create(dpy, screen, root, wa.width, wa.height, visual, depth, cmap);
        if (!drw_fontset_create(drw, fonts, LENGTH(fonts)))
                die("no fonts could be loaded.");
        lrpad = drw->fonts->h;
@@ -821,3 +922,40 @@ main(int argc, char *argv[])
 
        return 1; /* unreachable */
 }
+
+ void
+xinitvisual()
+{
+       XVisualInfo *infos;
+       XRenderPictFormat *fmt;
+       int nitems;
+       int i;
+
+       XVisualInfo tpl = {
+               .screen = screen,
+               .depth = 32,
+               .class = TrueColor
+       };
+       long masks = VisualScreenMask | VisualDepthMask | VisualClassMask;
+
+       infos = XGetVisualInfo(dpy, masks, &tpl, &nitems);
+       visual = NULL;
+       for(i = 0; i < nitems; i ++) {
+               fmt = XRenderFindVisualFormat(dpy, infos[i].visual);
+               if (fmt->type == PictTypeDirect && fmt->direct.alphaMask) {
+                       visual = infos[i].visual;
+                       depth = infos[i].depth;
+                       cmap = XCreateColormap(dpy, root, visual, AllocNone);
+                       useargb = 1;
+                       break;
+               }
+       }
+
+       XFree(infos);
+
+       if (! visual) {
+               visual = DefaultVisual(dpy, screen);
+               depth = DefaultDepth(dpy, screen);
+               cmap = DefaultColormap(dpy, screen);
+       }
+}