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patch: mousesupport
[dmenu.git] / dmenu.c
diff --git a/dmenu.c b/dmenu.c
index 688fabf..fb92462 100644 (file)
--- a/dmenu.c
+++ b/dmenu.c
@@ -1,734 +1,1077 @@
 /* See LICENSE file for copyright and license details. */
 #include <ctype.h>
 #include <locale.h>
 /* See LICENSE file for copyright and license details. */
 #include <ctype.h>
 #include <locale.h>
-#include <stdarg.h>
-#include <stdlib.h>
+#include <math.h>
 #include <stdio.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include <string.h>
+#include <strings.h>
+#include <time.h>
 #include <unistd.h>
 #include <unistd.h>
+
 #include <X11/Xlib.h>
 #include <X11/Xlib.h>
+#include <X11/Xatom.h>
+#include <X11/Xproto.h>
 #include <X11/Xutil.h>
 #include <X11/Xutil.h>
-#include <X11/keysym.h>
+#ifdef XINERAMA
+#include <X11/extensions/Xinerama.h>
+#endif
+#include <X11/Xft/Xft.h>
+
+#include "drw.h"
+#include "util.h"
 
 /* macros */
 
 /* macros */
-#define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
+#define INTERSECT(x,y,w,h,r)  (MAX(0, MIN((x)+(w),(r).x_org+(r).width)  - MAX((x),(r).x_org)) \
+                             * MAX(0, MIN((y)+(h),(r).y_org+(r).height) - MAX((y),(r).y_org)))
+#define LENGTH(X)             (sizeof X / sizeof X[0])
+#define TEXTW(X)              (drw_fontset_getwidth(drw, (X)) + lrpad)
+
+#define OPAQUE                0xffU
 
 /* enums */
 
 /* enums */
-enum { ColFG, ColBG, ColLast };
-
-/* typedefs */
-typedef struct {
-       int x, y, w, h;
-       unsigned long norm[ColLast];
-       unsigned long sel[ColLast];
-       Drawable drawable;
-       GC gc;
-       struct {
-               XFontStruct *xfont;
-               XFontSet set;
-               int ascent;
-               int descent;
-               int height;
-       } font;
-} DC; /* draw context */
-
-typedef struct Item Item;
-struct Item {
+enum { SchemeNorm, SchemeSel, SchemeOut, SchemeLast }; /* color schemes */
+
+struct item {
        char *text;
        char *text;
-       Bool matched;
-       Item *next;             /* traverses all items */
-       Item *left, *right;     /* traverses items matching current search pattern */
+       struct item *left, *right;
+       int out;
+       double distance;
 };
 
 };
 
-/* forward declarations */
-Item *appenditem(Item *i, Item *last);
-void calcoffsets(void);
-char *cistrstr(const char *s, const char *sub);
-void cleanup(void);
-void drawmenu(void);
-void drawtext(const char *text, unsigned long col[ColLast]);
-void *emalloc(unsigned int size);
-void eprint(const char *errstr, ...);
-char *estrdup(const char *str);
-unsigned long getcolor(const char *colstr);
-Bool grabkeyboard(void);
-void initfont(const char *fontstr);
-void kpress(XKeyEvent * e);
-void match(char *pattern);
-void readstdin(void);
-void run(void);
-void setup(int x, int y, int w);
-unsigned int textnw(const char *text, unsigned int len);
-unsigned int textw(const char *text);
+static char text[BUFSIZ] = "";
+static char *embed;
+static int bh, mw, mh;
+static int inputw = 0, promptw;
+static int lrpad; /* sum of left and right padding */
+static size_t cursor;
+static struct item *items = NULL;
+static struct item *matches, *matchend;
+static struct item *prev, *curr, *next, *sel;
+static int mon = -1, screen;
+
+static Atom clip, utf8;
+static Display *dpy;
+static Window root, parentwin, win;
+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"
 
 
 #include "config.h"
 
-/* variables */
-char *font = FONT;
-char *maxname = NULL;
-char *normbg = NORMBGCOLOR;
-char *normfg = NORMFGCOLOR;
-char *prompt = NULL;
-char *selbg = SELBGCOLOR;
-char *selfg = SELFGCOLOR;
-char text[4096];
-int screen;
-int ret = 0;
-unsigned int cmdw = 0;
-unsigned int mw, mh;
-unsigned int promptw = 0;
-unsigned int nitem = 0;
-unsigned int numlockmask = 0;
-Bool running = True;
-Display *dpy;
-DC dc = {0};
-Item *allitems = NULL; /* first of all items */
-Item *item = NULL;     /* first of pattern matching items */
-Item *sel = NULL;
-Item *next = NULL;
-Item *prev = NULL;
-Item *curr = NULL;
-Window root, win;
-int (*fstrncmp)(const char *, const char *, size_t n) = strncmp;
-char *(*fstrstr)(const char *, const char *) = strstr;
-
-Item *
-appenditem(Item *i, Item *last) {
-       if(!last)
-               item = i;
+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)
+{
+       unsigned int w = drw_fontset_getwidth_clamp(drw, str, n) + lrpad;
+       return MIN(w, n);
+}
+
+static void
+appenditem(struct item *item, struct item **list, struct item **last)
+{
+       if (*last)
+               (*last)->right = item;
        else
        else
-               last->right = i;
-       i->left = last;
-       i->right = NULL;
-       last = i;
-       nitem++;
-       return last;
+               *list = item;
+
+       item->left = *last;
+       item->right = NULL;
+       *last = item;
 }
 
 }
 
-void
-calcoffsets(void) {
-       unsigned int tw, w;
+static void
+calcoffsets(void)
+{
+       int i, n;
 
 
-       if(!curr)
-               return;
-       w = promptw + cmdw + 2 * SPACE;
-       for(next = curr; next; next=next->right) {
-               tw = textw(next->text);
-               if(tw > mw / 3)
-                       tw = mw / 3;
-               w += tw;
-               if(w > mw)
+       if (lines > 0)
+               n = lines * bh;
+       else
+               n = mw - (promptw + inputw + TEXTW("<") + TEXTW(">"));
+       /* calculate which items will begin the next page and previous page */
+       for (i = 0, next = curr; next; next = next->right)
+               if ((i += (lines > 0) ? bh : textw_clamp(next->text, n)) > n)
                        break;
                        break;
-       }
-       w = promptw + cmdw + 2 * SPACE;
-       for(prev = curr; prev && prev->left; prev=prev->left) {
-               tw = textw(prev->left->text);
-               if(tw > mw / 3)
-                       tw = mw / 3;
-               w += tw;
-               if(w > mw)
+       for (i = 0, prev = curr; prev && prev->left; prev = prev->left)
+               if ((i += (lines > 0) ? bh : textw_clamp(prev->left->text, n)) > n)
                        break;
                        break;
-       }
 }
 
 }
 
-char *
-cistrstr(const char *s, const char *sub) {
-       int c, csub;
-       unsigned int len;
-
-       if(!sub)
-               return (char *)s;
-       if((c = *sub++) != 0) {
-               c = tolower(c);
-               len = strlen(sub);
-               do {
-                       do {
-                               if((csub = *s++) == 0)
-                                       return (NULL);
-                       }
-                       while(tolower(csub) != c);
-               }
-               while(strncasecmp(s, sub, len) != 0);
-               s--;
-       }
-       return (char *)s;
+static int
+max_textw(void)
+{
+       int len = 0;
+       for (struct item *item = items; item && item->text; item++)
+               len = MAX(TEXTW(item->text), len);
+       return len;
 }
 
 }
 
-void
-cleanup(void) {
-       Item *itm;
-
-       while(allitems) {
-               itm = allitems->next;
-               free(allitems->text);
-               free(allitems);
-               allitems = itm;
+static void
+cleanup(void)
+{
+       size_t i;
+
+       XUngrabKey(dpy, AnyKey, AnyModifier, root);
+       for (i = 0; i < SchemeLast; i++)
+               free(scheme[i]);
+       for (i = 0; items && items[i].text; ++i)
+               free(items[i].text);
+       free(items);
+       drw_free(drw);
+       XSync(dpy, False);
+       XCloseDisplay(dpy);
+}
+
+static char *
+cistrstr(const char *h, const char *n)
+{
+       size_t i;
+
+       if (!n[0])
+               return (char *)h;
+
+       for (; *h; ++h) {
+               for (i = 0; n[i] && tolower((unsigned char)n[i]) ==
+                           tolower((unsigned char)h[i]); ++i)
+                       ;
+               if (n[i] == '\0')
+                       return (char *)h;
        }
        }
-       if(dc.font.set)
-               XFreeFontSet(dpy, dc.font.set);
+       return NULL;
+}
+
+static int
+drawitem(struct item *item, int x, int y, int w)
+{
+       if (item == sel)
+               drw_setscheme(drw, scheme[SchemeSel]);
+       else if (item->out)
+               drw_setscheme(drw, scheme[SchemeOut]);
        else
        else
-               XFreeFont(dpy, dc.font.xfont);
-       XFreePixmap(dpy, dc.drawable);
-       XFreeGC(dpy, dc.gc);
-       XDestroyWindow(dpy, win);
-       XUngrabKeyboard(dpy, CurrentTime);
+               drw_setscheme(drw, scheme[SchemeNorm]);
+
+       return drw_text(drw, x, y, w, bh, lrpad / 2, item->text, 0);
 }
 
 }
 
-void
-drawmenu(void) {
-       Item *i;
-
-       dc.x = 0;
-       dc.y = 0;
-       dc.w = mw;
-       dc.h = mh;
-       drawtext(NULL, dc.norm);
-       /* print prompt? */
-       if(promptw) {
-               dc.w = promptw;
-               drawtext(prompt, dc.sel);
+static void
+drawmenu(void)
+{
+       unsigned int curpos;
+       struct item *item;
+       int x = 0, y = 0, w;
+
+       drw_setscheme(drw, scheme[SchemeNorm]);
+       drw_rect(drw, 0, 0, mw, mh, 1, 1);
+
+       if (prompt && *prompt) {
+               drw_setscheme(drw, scheme[SchemeSel]);
+               x = drw_text(drw, x, 0, promptw, bh, lrpad / 2, prompt, 0);
+       }
+       /* draw input field */
+       w = (lines > 0 || !matches) ? mw - x : inputw;
+       drw_setscheme(drw, scheme[SchemeNorm]);
+       drw_text(drw, x, 0, w, bh, lrpad / 2, text, 0);
+
+       curpos = TEXTW(text) - TEXTW(&text[cursor]);
+       if ((curpos += lrpad / 2 - 1) < w) {
+               drw_setscheme(drw, scheme[SchemeNorm]);
+               drw_rect(drw, x + curpos, 2, 2, bh - 4, 1, 0);
        }
        }
-       dc.x += promptw;
-       dc.w = mw - promptw;
-       /* print command */
-       if(cmdw && item)
-               dc.w = cmdw;
-       drawtext(text[0] ? text : NULL, dc.norm);
-       dc.x += cmdw;
-       if(curr) {
-               dc.w = SPACE;
-               drawtext((curr && curr->left) ? "<" : NULL, dc.norm);
-               dc.x += dc.w;
-               /* determine maximum items */
-               for(i = curr; i != next; i=i->right) {
-                       dc.w = textw(i->text);
-                       if(dc.w > mw / 3)
-                               dc.w = mw / 3;
-                       drawtext(i->text, (sel == i) ? dc.sel : dc.norm);
-                       dc.x += dc.w;
+
+       if (lines > 0) {
+               /* draw vertical list */
+               for (item = curr; item != next; item = item->right)
+                       drawitem(item, x, y += bh, mw - x);
+       } else if (matches) {
+               /* draw horizontal list */
+               x += inputw;
+               w = TEXTW("<");
+               if (curr->left) {
+                       drw_setscheme(drw, scheme[SchemeNorm]);
+                       drw_text(drw, x, 0, w, bh, lrpad / 2, "<", 0);
+               }
+               x += w;
+               for (item = curr; item != next; item = item->right)
+                       x = drawitem(item, x, 0, textw_clamp(item->text, mw - x - TEXTW(">")));
+               if (next) {
+                       w = TEXTW(">");
+                       drw_setscheme(drw, scheme[SchemeNorm]);
+                       drw_text(drw, mw - w, 0, w, bh, lrpad / 2, ">", 0);
                }
                }
-               dc.x = mw - SPACE;
-               dc.w = SPACE;
-               drawtext(next ? ">" : NULL, dc.norm);
        }
        }
-       XCopyArea(dpy, dc.drawable, win, dc.gc, 0, 0, mw, mh, 0, 0);
-       XFlush(dpy);
+       drw_map(drw, win, 0, 0, mw, mh);
 }
 
 }
 
-void
-drawtext(const char *text, unsigned long col[ColLast]) {
-       int x, y, w, h;
-       static char buf[256];
-       unsigned int len, olen;
-       XRectangle r = { dc.x, dc.y, dc.w, dc.h };
-
-       XSetForeground(dpy, dc.gc, col[ColBG]);
-       XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
-       if(!text)
+static void
+grabfocus(void)
+{
+       struct timespec ts = { .tv_sec = 0, .tv_nsec = 10000000  };
+       Window focuswin;
+       int i, revertwin;
+
+       for (i = 0; i < 100; ++i) {
+               XGetInputFocus(dpy, &focuswin, &revertwin);
+               if (focuswin == win)
+                       return;
+               XSetInputFocus(dpy, win, RevertToParent, CurrentTime);
+               nanosleep(&ts, NULL);
+       }
+       die("cannot grab focus");
+}
+
+static void
+grabkeyboard(void)
+{
+       struct timespec ts = { .tv_sec = 0, .tv_nsec = 1000000  };
+       int i;
+
+       if (embed)
                return;
                return;
-       w = 0;
-       olen = len = strlen(text);
-       if(len >= sizeof buf)
-               len = sizeof buf - 1;
-       memcpy(buf, text, len);
-       buf[len] = 0;
-       h = dc.font.ascent + dc.font.descent;
-       y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
-       x = dc.x + (h / 2);
-       /* shorten text if necessary */
-       while(len && (w = textnw(buf, len)) > dc.w - h)
-               buf[--len] = 0;
-       if(len < olen) {
-               if(len > 1)
-                       buf[len - 1] = '.';
-               if(len > 2)
-                       buf[len - 2] = '.';
-               if(len > 3)
-                       buf[len - 3] = '.';
+       /* try to grab keyboard, we may have to wait for another process to ungrab */
+       for (i = 0; i < 1000; i++) {
+               if (XGrabKeyboard(dpy, DefaultRootWindow(dpy), True, GrabModeAsync,
+                                 GrabModeAsync, CurrentTime) == GrabSuccess)
+                       return;
+               nanosleep(&ts, NULL);
        }
        }
-       if(w > dc.w)
-               return; /* too long */
-       XSetForeground(dpy, dc.gc, col[ColFG]);
-       if(dc.font.set)
-               XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
-       else
-               XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
+       die("cannot grab keyboard");
 }
 
 }
 
-void *
-emalloc(unsigned int size) {
-       void *res = malloc(size);
+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;
 
 
-       if(!res)
-               eprint("fatal: could not malloc() %u bytes\n", size);
-       return res;
+       return da->distance == db->distance ? 0 : da->distance < db->distance ? -1 : 1;
 }
 
 void
 }
 
 void
-eprint(const char *errstr, ...) {
-       va_list ap;
+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;
 
 
-       va_start(ap, errstr);
-       vfprintf(stderr, errstr, ap);
-       va_end(ap);
-       exit(EXIT_FAILURE);
-}
+       matches = matchend = NULL;
 
 
-char *
-estrdup(const char *str) {
-       void *res = strdup(str);
+       /* 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(!res)
-               eprint("fatal: could not malloc() %u bytes\n", strlen(str));
-       return res;
+       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();
 }
 
 }
 
-unsigned long
-getcolor(const char *colstr) {
-       Colormap cmap = DefaultColormap(dpy, screen);
-       XColor color;
+static void
+match(void)
+{
+       if (fuzzy) {
+               fuzzymatch();
+               return;
+       }
+       static char **tokv = NULL;
+       static int tokn = 0;
 
 
-       if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
-               eprint("error, cannot allocate color '%s'\n", colstr);
-       return color.pixel;
-}
+       char buf[sizeof text], *s;
+       int i, tokc = 0;
+       size_t len, textsize;
+       struct item *item, *lprefix, *lsubstr, *prefixend, *substrend;
 
 
-Bool
-grabkeyboard(void) {
-       unsigned int len;
+       strcpy(buf, text);
+       /* separate input text into tokens to be matched individually */
+       for (s = strtok(buf, " "); s; tokv[tokc - 1] = s, s = strtok(NULL, " "))
+               if (++tokc > tokn && !(tokv = realloc(tokv, ++tokn * sizeof *tokv)))
+                       die("cannot realloc %zu bytes:", tokn * sizeof *tokv);
+       len = tokc ? strlen(tokv[0]) : 0;
 
 
-       for(len = 1000; len; len--) {
-               if(XGrabKeyboard(dpy, root, True, GrabModeAsync, GrabModeAsync, CurrentTime)
-                       == GrabSuccess)
-                       break;
-               usleep(1000);
+       matches = lprefix = lsubstr = matchend = prefixend = substrend = NULL;
+       textsize = strlen(text) + 1;
+       for (item = items; item && item->text; item++) {
+               for (i = 0; i < tokc; i++)
+                       if (!fstrstr(item->text, tokv[i]))
+                               break;
+               if (i != tokc) /* not all tokens match */
+                       continue;
+               /* exact matches go first, then prefixes, then substrings */
+               if (!tokc || !fstrncmp(text, item->text, textsize))
+                       appenditem(item, &matches, &matchend);
+               else if (!fstrncmp(tokv[0], item->text, len))
+                       appenditem(item, &lprefix, &prefixend);
+               else
+                       appenditem(item, &lsubstr, &substrend);
+       }
+       if (lprefix) {
+               if (matches) {
+                       matchend->right = lprefix;
+                       lprefix->left = matchend;
+               } else
+                       matches = lprefix;
+               matchend = prefixend;
        }
        }
-       return len > 0;
+       if (lsubstr) {
+               if (matches) {
+                       matchend->right = lsubstr;
+                       lsubstr->left = matchend;
+               } else
+                       matches = lsubstr;
+               matchend = substrend;
+       }
+       curr = sel = matches;
+       calcoffsets();
 }
 
 }
 
-void
-initfont(const char *fontstr) {
-       char *def, **missing;
-       int i, n;
+static void
+insert(const char *str, ssize_t n)
+{
+       if (strlen(text) + n > sizeof text - 1)
+               return;
+       /* move existing text out of the way, insert new text, and update cursor */
+       memmove(&text[cursor + n], &text[cursor], sizeof text - cursor - MAX(n, 0));
+       if (n > 0)
+               memcpy(&text[cursor], str, n);
+       cursor += n;
+       match();
+}
 
 
-       if(!fontstr || fontstr[0] == '\0')
-               eprint("error, cannot load font: '%s'\n", fontstr);
-       missing = NULL;
-       if(dc.font.set)
-               XFreeFontSet(dpy, dc.font.set);
-       dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
-       if(missing)
-               XFreeStringList(missing);
-       if(dc.font.set) {
-               XFontSetExtents *font_extents;
-               XFontStruct **xfonts;
-               char **font_names;
-               dc.font.ascent = dc.font.descent = 0;
-               font_extents = XExtentsOfFontSet(dc.font.set);
-               n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
-               for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
-                       if(dc.font.ascent < (*xfonts)->ascent)
-                               dc.font.ascent = (*xfonts)->ascent;
-                       if(dc.font.descent < (*xfonts)->descent)
-                               dc.font.descent = (*xfonts)->descent;
-                       xfonts++;
-               }
-       }
-       else {
-               if(dc.font.xfont)
-                       XFreeFont(dpy, dc.font.xfont);
-               dc.font.xfont = NULL;
-               if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
-               && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
-                       eprint("error, cannot load font: '%s'\n", fontstr);
-               dc.font.ascent = dc.font.xfont->ascent;
-               dc.font.descent = dc.font.xfont->descent;
+static size_t
+nextrune(int inc)
+{
+       ssize_t n;
+
+       /* return location of next utf8 rune in the given direction (+1 or -1) */
+       for (n = cursor + inc; n + inc >= 0 && (text[n] & 0xc0) == 0x80; n += inc)
+               ;
+       return n;
+}
+
+static void
+movewordedge(int dir)
+{
+       if (dir < 0) { /* move cursor to the start of the word*/
+               while (cursor > 0 && strchr(worddelimiters, text[nextrune(-1)]))
+                       cursor = nextrune(-1);
+               while (cursor > 0 && !strchr(worddelimiters, text[nextrune(-1)]))
+                       cursor = nextrune(-1);
+       } else { /* move cursor to the end of the word */
+               while (text[cursor] && strchr(worddelimiters, text[cursor]))
+                       cursor = nextrune(+1);
+               while (text[cursor] && !strchr(worddelimiters, text[cursor]))
+                       cursor = nextrune(+1);
        }
        }
-       dc.font.height = dc.font.ascent + dc.font.descent;
 }
 
 }
 
-void
-kpress(XKeyEvent * e) {
+static void
+keypress(XKeyEvent *ev)
+{
        char buf[32];
        char buf[32];
-       int i, num;
-       unsigned int len;
+       int len;
        KeySym ksym;
        KeySym ksym;
+       Status status;
 
 
-       len = strlen(text);
-       buf[0] = 0;
-       num = XLookupString(e, buf, sizeof buf, &ksym, 0);
-       if(IsKeypadKey(ksym)) { 
-               if(ksym == XK_KP_Enter) {
-                       ksym = XK_Return;
-               } else if(ksym >= XK_KP_0 && ksym <= XK_KP_9) {
-                       ksym = (ksym - XK_KP_0) + XK_0;
-               }
-       }
-       if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
-                       || IsMiscFunctionKey(ksym) || IsPFKey(ksym)
-                       || IsPrivateKeypadKey(ksym))
+       len = XmbLookupString(xic, ev, buf, sizeof buf, &ksym, &status);
+       switch (status) {
+       default: /* XLookupNone, XBufferOverflow */
                return;
                return;
-       /* first check if a control mask is omitted */
-       if(e->state & ControlMask) {
-               switch (ksym) {
-               default:        /* ignore other control sequences */
-                       return;
-               case XK_bracketleft:
-                       ksym = XK_Escape;
-                       break;
-               case XK_h:
-               case XK_H:
-                       ksym = XK_BackSpace;
+       case XLookupChars:
+               goto insert;
+       case XLookupKeySym:
+       case XLookupBoth:
+               break;
+       }
+
+       if (ev->state & ControlMask) {
+               switch(ksym) {
+               case XK_a: ksym = XK_Home;      break;
+               case XK_b: ksym = XK_Left;      break;
+               case XK_c: ksym = XK_Escape;    break;
+               case XK_d: ksym = XK_Delete;    break;
+               case XK_e: ksym = XK_End;       break;
+               case XK_f: ksym = XK_Right;     break;
+               case XK_g: ksym = XK_Escape;    break;
+               case XK_h: ksym = XK_BackSpace; break;
+               case XK_i: ksym = XK_Tab;       break;
+               case XK_j: /* fallthrough */
+               case XK_J: /* fallthrough */
+               case XK_m: /* fallthrough */
+               case XK_M: ksym = XK_Return; ev->state &= ~ControlMask; break;
+               case XK_n: ksym = XK_Down;      break;
+               case XK_p: ksym = XK_Up;        break;
+
+               case XK_k: /* delete right */
+                       text[cursor] = '\0';
+                       match();
                        break;
                        break;
-               case XK_i:
-               case XK_I:
-                       ksym = XK_Tab;
+               case XK_u: /* delete left */
+                       insert(NULL, 0 - cursor);
                        break;
                        break;
-               case XK_j:
-               case XK_J:
-                       ksym = XK_Return;
+               case XK_w: /* delete word */
+                       while (cursor > 0 && strchr(worddelimiters, text[nextrune(-1)]))
+                               insert(NULL, nextrune(-1) - cursor);
+                       while (cursor > 0 && !strchr(worddelimiters, text[nextrune(-1)]))
+                               insert(NULL, nextrune(-1) - cursor);
                        break;
                        break;
-               case XK_u:
-               case XK_U:
-                       text[0] = 0;
-                       match(text);
-                       drawmenu();
+               case XK_y: /* paste selection */
+               case XK_Y:
+                       XConvertSelection(dpy, (ev->state & ShiftMask) ? clip : XA_PRIMARY,
+                                         utf8, utf8, win, CurrentTime);
                        return;
                        return;
-               case XK_w:
-               case XK_W:
-                       if(len) {
-                               i = len - 1;
-                               while(i >= 0 && text[i] == ' ')
-                                       text[i--] = 0;
-                               while(i >= 0 && text[i] != ' ')
-                                       text[i--] = 0;
-                               match(text);
-                               drawmenu();
-                       }
+               case XK_Left:
+               case XK_KP_Left:
+                       movewordedge(-1);
+                       goto draw;
+               case XK_Right:
+               case XK_KP_Right:
+                       movewordedge(+1);
+                       goto draw;
+               case XK_Return:
+               case XK_KP_Enter:
+                       break;
+               case XK_bracketleft:
+                       cleanup();
+                       exit(1);
+               default:
                        return;
                }
                        return;
                }
-       }
-       if(CLEANMASK(e->state) & Mod1Mask) {
+       } else if (ev->state & Mod1Mask) {
                switch(ksym) {
                switch(ksym) {
-               default: return;
-               case XK_h:
-                       ksym = XK_Left;
-                       break;
-               case XK_l:
-                       ksym = XK_Right;
-                       break;
-               case XK_j:
-                       ksym = XK_Next;
-                       break;
-               case XK_k:
-                       ksym = XK_Prior;
-                       break;
-               case XK_g:
-                       ksym = XK_Home;
-                       break;
-               case XK_G:
-                       ksym = XK_End;
-                       break;
+               case XK_b:
+                       movewordedge(-1);
+                       goto draw;
+               case XK_f:
+                       movewordedge(+1);
+                       goto draw;
+               case XK_g: ksym = XK_Home;  break;
+               case XK_G: ksym = XK_End;   break;
+               case XK_h: ksym = XK_Up;    break;
+               case XK_j: ksym = XK_Next;  break;
+               case XK_k: ksym = XK_Prior; break;
+               case XK_l: ksym = XK_Down;  break;
+               default:
+                       return;
                }
        }
                }
        }
+
        switch(ksym) {
        default:
        switch(ksym) {
        default:
-               if(num && !iscntrl((int) buf[0])) {
-                       buf[num] = 0;
-                       if(len > 0)
-                               strncat(text, buf, sizeof text);
-                       else
-                               strncpy(text, buf, sizeof text);
-                       match(text);
-               }
+insert:
+               if (!iscntrl((unsigned char)*buf))
+                       insert(buf, len);
                break;
                break;
+       case XK_Delete:
+       case XK_KP_Delete:
+               if (text[cursor] == '\0')
+                       return;
+               cursor = nextrune(+1);
+               /* fallthrough */
        case XK_BackSpace:
        case XK_BackSpace:
-               if(len) {
-                       text[--len] = 0;
-                       match(text);
-               }
+               if (cursor == 0)
+                       return;
+               insert(NULL, nextrune(-1) - cursor);
                break;
        case XK_End:
                break;
        case XK_End:
-               if(!item)
-                       return;
-               while(next) {
-                       sel = curr = next;
+       case XK_KP_End:
+               if (text[cursor] != '\0') {
+                       cursor = strlen(text);
+                       break;
+               }
+               if (next) {
+                       /* jump to end of list and position items in reverse */
+                       curr = matchend;
                        calcoffsets();
                        calcoffsets();
+                       curr = prev;
+                       calcoffsets();
+                       while (next && (curr = curr->right))
+                               calcoffsets();
                }
                }
-               while(sel && sel->right)
-                       sel = sel->right;
+               sel = matchend;
                break;
        case XK_Escape:
                break;
        case XK_Escape:
-               ret = 1;
-               running = False;
-               break;
+               cleanup();
+               exit(1);
        case XK_Home:
        case XK_Home:
-               if(!item)
-                       return;
-               sel = curr = item;
+       case XK_KP_Home:
+               if (sel == matches) {
+                       cursor = 0;
+                       break;
+               }
+               sel = curr = matches;
                calcoffsets();
                break;
        case XK_Left:
                calcoffsets();
                break;
        case XK_Left:
-               if(!(sel && sel->left))
+       case XK_KP_Left:
+               if (cursor > 0 && (!sel || !sel->left || lines > 0)) {
+                       cursor = nextrune(-1);
+                       break;
+               }
+               if (lines > 0)
                        return;
                        return;
-               sel=sel->left;
-               if(sel->right == curr) {
+               /* fallthrough */
+       case XK_Up:
+       case XK_KP_Up:
+               if (sel && sel->left && (sel = sel->left)->right == curr) {
                        curr = prev;
                        calcoffsets();
                }
                break;
        case XK_Next:
                        curr = prev;
                        calcoffsets();
                }
                break;
        case XK_Next:
-               if(!next)
+       case XK_KP_Next:
+               if (!next)
                        return;
                sel = curr = next;
                calcoffsets();
                break;
        case XK_Prior:
                        return;
                sel = curr = next;
                calcoffsets();
                break;
        case XK_Prior:
-               if(!prev)
+       case XK_KP_Prior:
+               if (!prev)
                        return;
                sel = curr = prev;
                calcoffsets();
                break;
        case XK_Return:
                        return;
                sel = curr = prev;
                calcoffsets();
                break;
        case XK_Return:
-               if((e->state & ShiftMask) && text)
-                       fprintf(stdout, "%s", text);
-               else if(sel)
-                       fprintf(stdout, "%s", sel->text);
-               else if(text)
-                       fprintf(stdout, "%s", text);
-               fflush(stdout);
-               running = False;
+       case XK_KP_Enter:
+               puts((sel && !(ev->state & ShiftMask)) ? sel->text : text);
+               if (!(ev->state & ControlMask)) {
+                       cleanup();
+                       exit(0);
+               }
+               if (sel)
+                       sel->out = 1;
                break;
        case XK_Right:
                break;
        case XK_Right:
-               if(!(sel && sel->right))
+       case XK_KP_Right:
+               if (text[cursor] != '\0') {
+                       cursor = nextrune(+1);
+                       break;
+               }
+               if (lines > 0)
                        return;
                        return;
-               sel=sel->right;
-               if(sel == next) {
+               /* fallthrough */
+       case XK_Down:
+       case XK_KP_Down:
+               if (sel && sel->right && (sel = sel->right) == next) {
                        curr = next;
                        calcoffsets();
                }
                break;
        case XK_Tab:
                        curr = next;
                        calcoffsets();
                }
                break;
        case XK_Tab:
-               if(!sel)
+               if (!sel)
                        return;
                        return;
-               strncpy(text, sel->text, sizeof text);
-               match(text);
+               strncpy(text, sel->text, sizeof text - 1);
+               text[sizeof text - 1] = '\0';
+               cursor = strlen(text);
+               match();
                break;
        }
                break;
        }
+
+draw:
        drawmenu();
 }
 
        drawmenu();
 }
 
-void
-match(char *pattern) {
-       unsigned int plen;
-       Item *i, *j;
+static void
+buttonpress(XEvent *e)
+{
+       struct item *item;
+       XButtonPressedEvent *ev = &e->xbutton;
+       int x = 0, y = 0, h = bh, w;
 
 
-       if(!pattern)
+       if (ev->window != win)
                return;
                return;
-       plen = strlen(pattern);
-       item = j = NULL;
-       nitem = 0;
-       for(i = allitems; i; i = i->next)
-               if((i->matched = !fstrncmp(pattern, i->text, plen)))
-                       j = appenditem(i, j);
-       for(i = allitems; i; i = i->next)
-               if(!i->matched && fstrstr(i->text, pattern))
-                       j = appenditem(i, j);
-       curr = prev = next = sel = item;
-       calcoffsets();
-}
 
 
-void
-readstdin(void) {
-       char *p, buf[1024];
-       unsigned int len = 0, max = 0;
-       Item *i, *new;
+       /* right-click: exit */
+       if (ev->button == Button3)
+               exit(1);
 
 
-       i = 0;
-       while(fgets(buf, sizeof buf, stdin)) {
-               len = strlen(buf);
-               if (buf[len - 1] == '\n')
-                       buf[len - 1] = 0;
-               p = estrdup(buf);
-               if(max < len) {
-                       maxname = p;
-                       max = len;
+       if (prompt && *prompt)
+               x += promptw;
+
+       /* input field */
+       w = (lines > 0 || !matches) ? mw - x : inputw;
+
+       /* left-click on input: clear input,
+        * NOTE: if there is no left-arrow the space for < is reserved so
+        *       add that to the input width */
+       if (ev->button == Button1 &&
+          ((lines <= 0 && ev->x >= 0 && ev->x <= x + w +
+          ((!prev || !curr->left) ? TEXTW("<") : 0)) ||
+          (lines > 0 && ev->y >= y && ev->y <= y + h))) {
+               insert(NULL, -cursor);
+               drawmenu();
+               return;
+       }
+       /* middle-mouse click: paste selection */
+       if (ev->button == Button2) {
+               XConvertSelection(dpy, (ev->state & ShiftMask) ? clip : XA_PRIMARY,
+                                 utf8, utf8, win, CurrentTime);
+               drawmenu();
+               return;
+       }
+       /* scroll up */
+       if (ev->button == Button4 && prev) {
+               sel = curr = prev;
+               calcoffsets();
+               drawmenu();
+               return;
+       }
+       /* scroll down */
+       if (ev->button == Button5 && next) {
+               sel = curr = next;
+               calcoffsets();
+               drawmenu();
+               return;
+       }
+       if (ev->button != Button1)
+               return;
+       if (ev->state & ~ControlMask)
+               return;
+       if (lines > 0) {
+               /* vertical list: (ctrl)left-click on item */
+               w = mw - x;
+               for (item = curr; item != next; item = item->right) {
+                       y += h;
+                       if (ev->y >= y && ev->y <= (y + h)) {
+                               puts(item->text);
+                               if (!(ev->state & ControlMask))
+                                       exit(0);
+                               sel = item;
+                               if (sel) {
+                                       sel->out = 1;
+                                       drawmenu();
+                               }
+                               return;
+                       }
+               }
+       } else if (matches) {
+               /* left-click on left arrow */
+               x += inputw;
+               w = TEXTW("<");
+               if (prev && curr->left) {
+                       if (ev->x >= x && ev->x <= x + w) {
+                               sel = curr = prev;
+                               calcoffsets();
+                               drawmenu();
+                               return;
+                       }
+               }
+               /* horizontal list: (ctrl)left-click on item */
+               for (item = curr; item != next; item = item->right) {
+                       x += w;
+                       w = MIN(TEXTW(item->text), mw - x - TEXTW(">"));
+                       if (ev->x >= x && ev->x <= x + w) {
+                               puts(item->text);
+                               if (!(ev->state & ControlMask))
+                                       exit(0);
+                               sel = item;
+                               if (sel) {
+                                       sel->out = 1;
+                                       drawmenu();
+                               }
+                               return;
+                       }
+               }
+               /* left-click on right arrow */
+               w = TEXTW(">");
+               x = mw - w;
+               if (next && ev->x >= x && ev->x <= x + w) {
+                       sel = curr = next;
+                       calcoffsets();
+                       drawmenu();
+                       return;
                }
                }
-               new = emalloc(sizeof(Item));
-               new->next = new->left = new->right = NULL;
-               new->text = p;
-               if(!i)
-                       allitems = new;
-               else 
-                       i->next = new;
-               i = new;
        }
 }
 
        }
 }
 
-void
-run(void) {
+static void
+paste(void)
+{
+       char *p, *q;
+       int di;
+       unsigned long dl;
+       Atom da;
+
+       /* we have been given the current selection, now insert it into input */
+       if (XGetWindowProperty(dpy, win, utf8, 0, (sizeof text / 4) + 1, False,
+                          utf8, &da, &di, &dl, &dl, (unsigned char **)&p)
+           == Success && p) {
+               insert(p, (q = strchr(p, '\n')) ? q - p : (ssize_t)strlen(p));
+               XFree(p);
+       }
+       drawmenu();
+}
+
+static void
+readstdin(void)
+{
+       char buf[sizeof text], *p;
+       size_t i, size = 0;
+
+       /* read each line from stdin and add it to the item list */
+       for (i = 0; fgets(buf, sizeof buf, stdin); i++) {
+               if (i + 1 >= size / sizeof *items)
+                       if (!(items = realloc(items, (size += BUFSIZ))))
+                               die("cannot realloc %zu bytes:", size);
+               if ((p = strchr(buf, '\n')))
+                       *p = '\0';
+               if (!(items[i].text = strdup(buf)))
+                       die("cannot strdup %zu bytes:", strlen(buf) + 1);
+               items[i].out = 0;
+       }
+       if (items)
+               items[i].text = NULL;
+       lines = MIN(lines, i);
+}
+
+static void
+run(void)
+{
        XEvent ev;
 
        XEvent ev;
 
-       /* main event loop */
-       while(running && !XNextEvent(dpy, &ev))
-               switch (ev.type) {
-               default:        /* ignore all crap */
+       while (!XNextEvent(dpy, &ev)) {
+               if (XFilterEvent(&ev, win))
+                       continue;
+               switch(ev.type) {
+               case DestroyNotify:
+                       if (ev.xdestroywindow.window != win)
+                               break;
+                       cleanup();
+                       exit(1);
+               case ButtonPress:
+                       buttonpress(&ev);
+                       break;
+               case Expose:
+                       if (ev.xexpose.count == 0)
+                               drw_map(drw, win, 0, 0, mw, mh);
+                       break;
+               case FocusIn:
+                       /* regrab focus from parent window */
+                       if (ev.xfocus.window != win)
+                               grabfocus();
                        break;
                case KeyPress:
                        break;
                case KeyPress:
-                       kpress(&ev.xkey);
+                       keypress(&ev.xkey);
                        break;
                        break;
-               case Expose:
-                       if(ev.xexpose.count == 0)
-                               drawmenu();
+               case SelectionNotify:
+                       if (ev.xselection.property == utf8)
+                               paste();
+                       break;
+               case VisibilityNotify:
+                       if (ev.xvisibility.state != VisibilityUnobscured)
+                               XRaiseWindow(dpy, win);
                        break;
                }
                        break;
                }
+       }
 }
 
 }
 
-void
-setup(int x, int y, int w) {
-       unsigned int i, j;
-       XModifierKeymap *modmap;
-       XSetWindowAttributes wa;
-
-       /* init modifier map */
-       modmap = XGetModifierMapping(dpy);
-       for(i = 0; i < 8; i++)
-               for(j = 0; j < modmap->max_keypermod; j++) {
-                       if(modmap->modifiermap[i * modmap->max_keypermod + j]
-                       == XKeysymToKeycode(dpy, XK_Num_Lock))
-                               numlockmask = (1 << i);
+static void
+setup(void)
+{
+       int x, y, i, j;
+       unsigned int du, tmp;
+       XSetWindowAttributes swa;
+       XIM xim;
+       Window w, dw, *dws;
+       XWindowAttributes wa;
+       XClassHint ch = {"dmenu", "dmenu"};
+       struct item *item;
+#ifdef XINERAMA
+       XineramaScreenInfo *info;
+       Window pw;
+       int a, di, n, area = 0;
+#endif
+       /* init appearance */
+       for (j = 0; j < SchemeLast; j++)
+               scheme[j] = drw_scm_create(drw, colors[j], alphas[j], 2);
+
+       clip = XInternAtom(dpy, "CLIPBOARD",   False);
+       utf8 = XInternAtom(dpy, "UTF8_STRING", False);
+
+       /* calculate menu geometry */
+       bh = drw->fonts->h + 2;
+       lines = MAX(lines, 0);
+       mh = (lines + 1) * bh;
+       promptw = (prompt && *prompt) ? TEXTW(prompt) - lrpad / 4 : 0;
+#ifdef XINERAMA
+       i = 0;
+       if (parentwin == root && (info = XineramaQueryScreens(dpy, &n))) {
+               XGetInputFocus(dpy, &w, &di);
+               if (mon >= 0 && mon < n)
+                       i = mon;
+               else if (w != root && w != PointerRoot && w != None) {
+                       /* find top-level window containing current input focus */
+                       do {
+                               if (XQueryTree(dpy, (pw = w), &dw, &w, &dws, &du) && dws)
+                                       XFree(dws);
+                       } while (w != root && w != pw);
+                       /* find xinerama screen with which the window intersects most */
+                       if (XGetWindowAttributes(dpy, pw, &wa))
+                               for (j = 0; j < n; j++)
+                                       if ((a = INTERSECT(wa.x, wa.y, wa.width, wa.height, info[j])) > area) {
+                                               area = a;
+                                               i = j;
+                                       }
+               }
+               /* no focused window is on screen, so use pointer location instead */
+               if (mon < 0 && !area && XQueryPointer(dpy, root, &dw, &dw, &x, &y, &di, &di, &du))
+                       for (i = 0; i < n; i++)
+                               if (INTERSECT(x, y, 1, 1, info[i]) != 0)
+                                       break;
+
+               if (centered) {
+                       mw = MIN(MAX(max_textw() + promptw, min_width), info[i].width);
+                       x = info[i].x_org + ((info[i].width  - mw) / 2);
+                       y = info[i].y_org + ((info[i].height - mh) / 2);
+               } else {
+                       x = info[i].x_org;
+                       y = info[i].y_org + (topbar ? 0 : info[i].height - mh);
+                       mw = info[i].width;
+               }
+
+               XFree(info);
+       } else
+#endif
+       {
+               if (!XGetWindowAttributes(dpy, parentwin, &wa))
+                       die("could not get embedding window attributes: 0x%lx",
+                           parentwin);
+
+               if (centered) {
+                       mw = MIN(MAX(max_textw() + promptw, min_width), wa.width);
+                       x = (wa.width  - mw) / 2;
+                       y = (wa.height - mh) / 2;
+               } else {
+                       x = 0;
+                       y = topbar ? 0 : wa.height - mh;
+                       mw = wa.width;
                }
                }
-       XFreeModifiermap(modmap);
-
-       /* style */
-       dc.norm[ColBG] = getcolor(normbg);
-       dc.norm[ColFG] = getcolor(normfg);
-       dc.sel[ColBG] = getcolor(selbg);
-       dc.sel[ColFG] = getcolor(selfg);
-       initfont(font);
-
-       /* menu window */
-       wa.override_redirect = 1;
-       wa.background_pixmap = ParentRelative;
-       wa.event_mask = ExposureMask | ButtonPressMask | KeyPressMask;
-       mw = w ? w : DisplayWidth(dpy, screen);
-       mh = dc.font.height + 2;
-       if(y < 0) {
-               if(y == (int)(unsigned int)-1)
-                       y = DisplayHeight(dpy, screen) - mh;
-               else
-                       y = (-1 * y) - mh;
        }
        }
-       win = XCreateWindow(dpy, root, x, y, mw, mh, 0,
-                       DefaultDepth(dpy, screen), CopyFromParent,
-                       DefaultVisual(dpy, screen),
-                       CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
-
-       /* pixmap */
-       dc.drawable = XCreatePixmap(dpy, root, mw, mh, DefaultDepth(dpy, screen));
-       dc.gc = XCreateGC(dpy, root, 0, 0);
-       XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
-       if(!dc.font.set)
-               XSetFont(dpy, dc.gc, dc.font.xfont->fid);
-       if(maxname)
-               cmdw = textw(maxname);
-       if(cmdw > mw / 3)
-               cmdw = mw / 3;
-       if(prompt)
-               promptw = textw(prompt);
-       if(promptw > mw / 5)
-               promptw = mw / 5;
-       text[0] = 0;
-       match(text);
-       XMapRaised(dpy, win);
-}
+       for (item = items; item && item->text; ++item) {
+               if ((tmp = textw_clamp(item->text, mw/3)) > inputw) {
+                       if ((inputw = tmp) == mw/3)
+                               break;
+               }
+       }
+       match();
+
+       /* create menu window */
+       swa.override_redirect = True;
+       swa.background_pixel = 0;
+       swa.border_pixel = 0;
+       swa.colormap = cmap;
+       swa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask | ButtonPressMask;
+       win = XCreateWindow(dpy, parentwin, x, y, mw, mh, 0,
+                           depth, CopyFromParent, visual,
+                           CWOverrideRedirect | CWBackPixel | CWBorderPixel | CWColormap | CWEventMask, &swa);
+       XSetClassHint(dpy, win, &ch);
 
 
-unsigned int
-textnw(const char *text, unsigned int len) {
-       XRectangle r;
 
 
-       if(dc.font.set) {
-               XmbTextExtents(dc.font.set, text, len, NULL, &r);
-               return r.width;
+       /* input methods */
+       if ((xim = XOpenIM(dpy, NULL, NULL, NULL)) == NULL)
+               die("XOpenIM failed: could not open input device");
+
+       xic = XCreateIC(xim, XNInputStyle, XIMPreeditNothing | XIMStatusNothing,
+                       XNClientWindow, win, XNFocusWindow, win, NULL);
+
+       XMapRaised(dpy, win);
+       if (embed) {
+               XSelectInput(dpy, parentwin, FocusChangeMask | SubstructureNotifyMask);
+               if (XQueryTree(dpy, parentwin, &dw, &w, &dws, &du) && dws) {
+                       for (i = 0; i < du && dws[i] != win; ++i)
+                               XSelectInput(dpy, dws[i], FocusChangeMask);
+                       XFree(dws);
+               }
+               grabfocus();
        }
        }
-       return XTextWidth(dc.font.xfont, text, len);
+       drw_resize(drw, mw, mh);
+       drawmenu();
 }
 
 }
 
-unsigned int
-textw(const char *text) {
-       return textnw(text, strlen(text)) + dc.font.height;
+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);
+       exit(1);
 }
 
 int
 }
 
 int
-main(int argc, char *argv[]) {
-       int x = 0, y = 0, w = 0;
-       unsigned int i;
+main(int argc, char *argv[])
+{
+       XWindowAttributes wa;
+       int i, fast = 0;
 
 
-       /* command line args */
-       for(i = 1; i < argc; i++)
-               if(!strcmp(argv[i], "-i")) {
+       for (i = 1; i < argc; i++)
+               /* these options take no arguments */
+               if (!strcmp(argv[i], "-v")) {      /* prints version information */
+                       puts("dmenu-"VERSION);
+                       exit(0);
+               } else if (!strcmp(argv[i], "-b")) /* appears at the bottom of the screen */
+                       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 */
                        fstrncmp = strncasecmp;
                        fstrstr = cistrstr;
                        fstrncmp = strncasecmp;
                        fstrstr = cistrstr;
-               }
-               else if(!strcmp(argv[i], "-fn")) {
-                       if(++i < argc) font = argv[i];
-               }
-               else if(!strcmp(argv[i], "-nb")) {
-                       if(++i < argc) normbg = argv[i];
-               }
-               else if(!strcmp(argv[i], "-nf")) {
-                       if(++i < argc) normfg = argv[i];
-               }
-               else if(!strcmp(argv[i], "-p")) {
-                       if(++i < argc) prompt = argv[i];
-               }
-               else if(!strcmp(argv[i], "-sb")) {
-                       if(++i < argc) selbg = argv[i];
-               }
-               else if(!strcmp(argv[i], "-sf")) {
-                       if(++i < argc) selfg = argv[i];
-               }
-               else if(!strcmp(argv[i], "-x")) {
-                       if(++i < argc) x = atoi(argv[i]);
-               }
-               else if(!strcmp(argv[i], "-y")) {
-                       if(++i < argc) {
-                               if(!strcmp(argv[i], "-0"))
-                                       y = (int)(unsigned int)-1;
-                               else
-                                       y = atoi(argv[i]);
-                       }
-               }
-               else if(!strcmp(argv[i], "-w")) {
-                       if(++i < argc) w = atoi(argv[i]);
-               }
-               else if(!strcmp(argv[i], "-v"))
-                       eprint("dmenu-"VERSION", © 2006-2008 dmenu engineers, see LICENSE for details\n");
+               } else if (i + 1 == argc)
+                       usage();
+               /* these options take one argument */
+               else if (!strcmp(argv[i], "-l"))   /* number of lines in vertical list */
+                       lines = atoi(argv[++i]);
+               else if (!strcmp(argv[i], "-m"))
+                       mon = atoi(argv[++i]);
+               else if (!strcmp(argv[i], "-p"))   /* adds prompt to left of input field */
+                       prompt = argv[++i];
+               else if (!strcmp(argv[i], "-fn"))  /* font or font set */
+                       fonts[0] = argv[++i];
+               else if (!strcmp(argv[i], "-nb"))  /* normal background color */
+                       colors[SchemeNorm][ColBg] = argv[++i];
+               else if (!strcmp(argv[i], "-nf"))  /* normal foreground color */
+                       colors[SchemeNorm][ColFg] = argv[++i];
+               else if (!strcmp(argv[i], "-sb"))  /* selected background color */
+                       colors[SchemeSel][ColBg] = argv[++i];
+               else if (!strcmp(argv[i], "-sf"))  /* selected foreground color */
+                       colors[SchemeSel][ColFg] = argv[++i];
+               else if (!strcmp(argv[i], "-w"))   /* embedding window id */
+                       embed = argv[++i];
                else
                else
-                       eprint("usage: dmenu [-i] [-fn <font>] [-nb <color>] [-nf <color>]\n"
-                              "             [-p <prompt>] [-sb <color>] [-sf <color>]\n"
-                              "             [-x <x>] [-y <y>] [-w <w>] [-v]\n");
-       setlocale(LC_CTYPE, "");
-       dpy = XOpenDisplay(0);
-       if(!dpy)
-               eprint("dmenu: cannot open display\n");
+                       usage();
+
+       if (!setlocale(LC_CTYPE, "") || !XSupportsLocale())
+               fputs("warning: no locale support\n", stderr);
+       if (!(dpy = XOpenDisplay(NULL)))
+               die("cannot open display");
        screen = DefaultScreen(dpy);
        root = RootWindow(dpy, screen);
        screen = DefaultScreen(dpy);
        root = RootWindow(dpy, screen);
+       if (!embed || !(parentwin = strtol(embed, NULL, 0)))
+               parentwin = root;
+       if (!XGetWindowAttributes(dpy, parentwin, &wa))
+               die("could not get embedding window attributes: 0x%lx",
+                   parentwin);
+       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;
+
+#ifdef __OpenBSD__
+       if (pledge("stdio rpath", NULL) == -1)
+               die("pledge");
+#endif
 
 
-       if(isatty(STDIN_FILENO)) {
+       if (fast && !isatty(0)) {
+               grabkeyboard();
                readstdin();
                readstdin();
-               running = grabkeyboard();
-       }
-       else { /* prevent keypress loss */
-               running = grabkeyboard();
+       } else {
                readstdin();
                readstdin();
+               grabkeyboard();
        }
        }
-
-       setup(x, y, w);
-       drawmenu();
-       XSync(dpy, False);
+       setup();
        run();
        run();
-       cleanup();
-       XCloseDisplay(dpy);
-       return ret;
+
+       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);
+       }
 }
 }