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dmenu: style improvements
[dmenu.git] / dmenu.c
diff --git a/dmenu.c b/dmenu.c
index 9386e06..49a6583 100644 (file)
--- a/dmenu.c
+++ b/dmenu.c
@@ -1,481 +1,695 @@
 /* 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 <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <strings.h>
 #include <unistd.h>
 #include <unistd.h>
-#include <X11/keysym.h>
 #include <X11/Xlib.h>
 #include <X11/Xlib.h>
+#include <X11/Xatom.h>
 #include <X11/Xutil.h>
 #include <X11/Xutil.h>
-#include "dmenu.h"
+#ifdef XINERAMA
+#include <X11/extensions/Xinerama.h>
+#endif
+#include <X11/Xft/Xft.h>
+
+#include "drw.h"
+#include "util.h"
+
+/* macros */
+#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 TEXTNW(X,N)           (drw_font_getexts_width(drw->fonts[0], (X), (N)))
+#define TEXTW(X)              (drw_text(drw, 0, 0, 0, 0, (X), 0) + drw->fonts[0]->h)
+
+/* enums */
+enum { SchemeNorm, SchemeSel, SchemeOut, SchemeLast }; /* color schemes */
 
 typedef struct Item Item;
 struct Item {
        char *text;
 
 typedef struct Item Item;
 struct Item {
        char *text;
-       Item *next;         /* traverses all items */
-       Item *left, *right; /* traverses items matching current search pattern */
+       Item *left, *right;
+       bool out;
 };
 
 };
 
-/* forward declarations */
-static void appenditem(Item *i, Item **list, Item **last);
-static void calcoffsetsh(void);
-static void calcoffsetsv(void);
-static char *cistrstr(const char *s, const char *sub);
+static void appenditem(Item *, Item **, Item **);
+static void calcoffsets(void);
+static char *cistrstr(const char *, const char *);
 static void cleanup(void);
 static void cleanup(void);
-static void dinput(void);
-static void drawitem(const char *s, unsigned long col[ColLast]);
-static void drawmenuh(void);
-static void drawmenuv(void);
+static void drawmenu(void);
+static void grabkeyboard(void);
+static void insert(const char *, ssize_t);
+static void keypress(XKeyEvent *);
 static void match(void);
 static void match(void);
+static size_t nextrune(int);
+static void paste(void);
 static void readstdin(void);
 static void readstdin(void);
+static void run(void);
+static void setup(void);
+static void usage(void);
+
+static char text[BUFSIZ] = "";
+static int bh, mw, mh;
+static int sw, sh; /* X display screen geometry width, height */
+static int inputw, promptw;
+static size_t cursor;
+static Item *items = NULL;
+static Item *matches, *matchend;
+static Item *prev, *curr, *next, *sel;
+static int mon = -1, screen;
+
+static Atom clip, utf8;
+static Display *dpy;
+static Window root, win;
+static XIC xic;
+
+static ClrScheme scheme[SchemeLast];
+static Drw *drw;
+
+#include "config.h"
 
 
-/* variables */
-static char **argp = NULL;
-static char *maxname = NULL;
-static unsigned int cmdw = 0;
-static unsigned int lines = 0;
-static Item *allitems = NULL;  /* first of all items */
-static Item *item = NULL;      /* first of pattern matching items */
-static Item *sel = NULL;
-static Item *next = NULL;
-static Item *prev = NULL;
-static Item *curr = NULL;
 static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
 static char *(*fstrstr)(const char *, const char *) = strstr;
 static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
 static char *(*fstrstr)(const char *, const char *) = strstr;
-static void (*calcoffsets)(void) = calcoffsetsh;
 
 
-void
-appenditem(Item *i, Item **list, Item **last) {
-       if(!(*last))
-               *list = i;
+static void
+appenditem(Item *item, Item **list, Item **last)
+{
+       if (*last)
+               (*last)->right = item;
        else
        else
-               (*last)->right = i;
-       i->left = *last;
-       i->right = NULL;
-       *last = i;
+               *list = item;
+
+       item->left = *last;
+       item->right = NULL;
+       *last = item;
 }
 
 }
 
-void
-calcoffsetsh(void) {
-       unsigned int w, x;
+static void
+calcoffsets(void)
+{
+       int i, n;
 
 
-       w = promptw + cmdw + textw(&dc, "<") + textw(&dc, ">");
-       for(x = w, next = curr; next; next = next->right)
-               if((x += MIN(textw(&dc, next->text), mw / 3)) > 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 : MIN(TEXTW(next->text), n)) > n)
                        break;
                        break;
-       for(x = w, prev = curr; prev && prev->left; prev = prev->left)
-               if((x += MIN(textw(&dc, prev->left->text), mw / 3)) > mw)
+       for (i = 0, prev = curr; prev && prev->left; prev = prev->left)
+               if ((i += (lines > 0) ? bh : MIN(TEXTW(prev->left->text), n)) > n)
                        break;
 }
 
                        break;
 }
 
-void
-calcoffsetsv(void) {
-       unsigned int i;
-
-       next = prev = curr;
-       for(i = 0; i < lines && next; i++)
-               next = next->right;
-       mh = (dc.font.height + 2) * (i + 1);
-       for(i = 0; i < lines && prev && prev->left; i++)
-               prev = prev->left;
+static void
+cleanup(void)
+{
+       XUngrabKey(dpy, AnyKey, AnyModifier, root);
+       drw_clr_free(scheme[SchemeNorm].bg);
+       drw_clr_free(scheme[SchemeNorm].fg);
+       drw_clr_free(scheme[SchemeSel].fg);
+       drw_clr_free(scheme[SchemeSel].bg);
+       drw_clr_free(scheme[SchemeOut].fg);
+       drw_clr_free(scheme[SchemeOut].bg);
+       drw_free(drw);
+       XSync(dpy, False);
+       XCloseDisplay(dpy);
 }
 
 }
 
-char *
-cistrstr(const char *s, const char *sub) {
-       int c, csub;
-       unsigned int len;
+static char *
+cistrstr(const char *s, const char *sub)
+{
+       size_t len;
 
 
-       if(!sub)
-               return (char *)s;
-       if((c = tolower(*sub++)) != '\0') {
-               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;
+       for (len = strlen(sub); *s; s++)
+               if (!strncasecmp(s, sub, len))
+                       return (char *)s;
+       return NULL;
 }
 
 }
 
-void
-cleanup(void) {
-       Item *itm;
+static void
+drawmenu(void)
+{
+       int curpos;
+       Item *item;
+       int x = 0, y = 0, h = bh, w;
 
 
-       while(allitems) {
-               itm = allitems->next;
-               free(allitems->text);
-               free(allitems);
-               allitems = itm;
-       }
-       cleanupdraw(&dc);
-       XDestroyWindow(dpy, win);
-       XUngrabKeyboard(dpy, CurrentTime);
-       XCloseDisplay(dpy);
-}
+       drw_setscheme(drw, &scheme[SchemeNorm]);
+       drw_rect(drw, 0, 0, mw, mh, 1, 1, 1);
 
 
-void
-dinput(void) {
-       cleanup();
-       argp[0] = "dinput";
-       argp[1] = text;
-       execvp("dinput", argp);
-       eprint("cannot exec dinput\n");
-}
+       if (prompt && *prompt) {
+               drw_setscheme(drw, &scheme[SchemeSel]);
+               drw_text(drw, x, 0, promptw, bh, prompt, 0);
+               x += promptw;
+       }
+       /* draw input field */
+       w = (lines > 0 || !matches) ? mw - x : inputw;
+       drw_setscheme(drw, &scheme[SchemeNorm]);
+       drw_text(drw, x, 0, w, bh, text, 0);
 
 
-void
-drawbar(void) {
-       dc.x = 0;
-       dc.y = 0;
-       dc.w = mw;
-       dc.h = mh;
-       drawbox(&dc, normcol);
-       dc.h = dc.font.height + 2;
-       dc.y = topbar ? 0 : mh - dc.h;
-       /* print prompt? */
-       if(prompt) {
-               dc.w = promptw;
-               drawbox(&dc, selcol);
-               drawtext(&dc, prompt, selcol);
-               dc.x += dc.w;
+       if ((curpos = TEXTNW(text, cursor) + bh / 2 - 2) < w) {
+               drw_setscheme(drw, &scheme[SchemeNorm]);
+               drw_rect(drw, x + curpos + 2, 2, 1, bh - 4, 1, 1, 0);
        }
        }
-       dc.w = mw - dc.x;
-       /* print command */
-       if(cmdw && item && lines == 0)
-               dc.w = cmdw;
-       drawtext(&dc, text, normcol);
-       if(lines > 0)
-               drawmenuv();
-       else if(curr)
-               drawmenuh();
-       commitdraw(&dc, win);
-}
 
 
-void
-drawitem(const char *s, unsigned long col[ColLast]) {
-       const char *p;
-       unsigned int w = textnw(&dc, text, strlen(text));
+       if (lines > 0) {
+               /* draw vertical list */
+               w = mw - x;
+               for (item = curr; item != next; item = item->right) {
+                       y += h;
+                       if (item == sel)
+                               drw_setscheme(drw, &scheme[SchemeSel]);
+                       else if (item->out)
+                               drw_setscheme(drw, &scheme[SchemeOut]);
+                       else
+                               drw_setscheme(drw, &scheme[SchemeNorm]);
 
 
-       drawbox(&dc, col);
-       drawtext(&dc, s, col);
-       for(p = fstrstr(s, text); *text && (p = fstrstr(p, text)); p++)
-               drawline(&dc, textnw(&dc, s, p-s) + dc.h/2 - 1, dc.h-2, w, 1, col);
-}
+                       drw_text(drw, x, y, w, bh, item->text, 0);
+               }
+       } 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, "<", 0);
+               }
+               for (item = curr; item != next; item = item->right) {
+                       x += w;
+                       w = MIN(TEXTW(item->text), mw - x - TEXTW(">"));
 
 
-void
-drawmenuh(void) {
-       Item *i;
-
-       dc.x += cmdw;
-       dc.w = textw(&dc, "<");
-       drawtext(&dc, curr->left ? "<" : NULL, normcol);
-       dc.x += dc.w;
-       for(i = curr; i != next; i = i->right) {
-               dc.w = MIN(textw(&dc, i->text), mw / 3);
-               drawitem(i->text, (sel == i) ? selcol : normcol);
-               dc.x += dc.w;
+                       if (item == sel)
+                               drw_setscheme(drw, &scheme[SchemeSel]);
+                       else if (item->out)
+                               drw_setscheme(drw, &scheme[SchemeOut]);
+                       else
+                               drw_setscheme(drw, &scheme[SchemeNorm]);
+                       drw_text(drw, x, 0, w, bh, item->text, 0);
+               }
+               w = TEXTW(">");
+               x = mw - w;
+               if (next) {
+                       drw_setscheme(drw, &scheme[SchemeNorm]);
+                       drw_text(drw, x, 0, w, bh, ">", 0);
+               }
        }
        }
-       dc.w = textw(&dc, ">");
-       dc.x = mw - dc.w;
-       drawtext(&dc, next ? ">" : NULL, normcol);
+       drw_map(drw, win, 0, 0, mw, mh);
 }
 
 }
 
-void
-drawmenuv(void) {
-       Item *i;
-       XWindowAttributes wa;
+static void
+grabkeyboard(void)
+{
+       int i;
 
 
-       dc.y = topbar ? dc.h : 0;
-       dc.w = mw - dc.x;
-       for(i = curr; i != next; i = i->right) {
-               drawitem(i->text, (sel == i) ? selcol : normcol);
-               dc.y += dc.h;
+       /* 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;
+               usleep(1000);
        }
        }
-       if(!XGetWindowAttributes(dpy, win, &wa))
-               eprint("cannot get window attributes");
-       XMoveResizeWindow(dpy, win, wa.x, wa.y + (topbar ? 0 : wa.height - mh), mw, mh);
+       die("cannot grab keyboard\n");
 }
 
 }
 
-void
-kpress(XKeyEvent *e) {
-       char buf[sizeof text];
-       int num;
-       unsigned int i, len;
-       KeySym ksym;
-
-       len = strlen(text);
-       num = XLookupString(e, buf, sizeof buf, &ksym, NULL);
-       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;
-       else if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
-       || IsMiscFunctionKey(ksym) || IsPFKey(ksym)
-       || IsPrivateKeypadKey(ksym))
+static void
+insert(const char *str, ssize_t n)
+{
+       if (strlen(text) + n > sizeof text - 1)
                return;
                return;
-       /* first check if a control mask is omitted */
-       if(e->state & ControlMask) {
-               switch(tolower(ksym)) {
-               default:
-                       return;
-               case XK_a:
-                       ksym = XK_Home;
-                       break;
-               case XK_b:
-                       ksym = XK_Left;
-                       break;
-               case XK_c:
-                       ksym = XK_Escape;
-                       break;
-               case XK_e:
-                       ksym = XK_End;
-                       break;
-               case XK_f:
-                       ksym = XK_Right;
-                       break;
-               case XK_h:
-                       ksym = XK_BackSpace;
-                       break;
-               case XK_i:
-                       ksym = XK_Tab;
-                       break;
-               case XK_j:
-               case XK_m:
-                       ksym = XK_Return;
-                       break;
-               case XK_n:
-                       ksym = XK_Down;
+       /* 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();
+}
+
+static void
+keypress(XKeyEvent *ev)
+{
+       char buf[32];
+       int len;
+       KeySym ksym = NoSymbol;
+       Status status;
+
+       len = XmbLookupString(xic, ev, buf, sizeof buf, &ksym, &status);
+       if (status == XBufferOverflow)
+               return;
+       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_p:
-                       ksym = XK_Up;
+               case XK_u: /* delete left */
+                       insert(NULL, 0 - cursor);
                        break;
                        break;
-               case XK_u:
-                       text[0] = '\0';
-                       match();
+               case XK_w: /* delete word */
+                       while (cursor > 0 && text[nextrune(-1)] == ' ')
+                               insert(NULL, nextrune(-1) - cursor);
+                       while (cursor > 0 && text[nextrune(-1)] != ' ')
+                               insert(NULL, nextrune(-1) - cursor);
                        break;
                        break;
-               case XK_w:
-                       if(len == 0)
-                               return;
-                       i = len;
-                       while(i-- > 0 && text[i] == ' ');
-                       while(i-- > 0 && text[i] != ' ');
-                       text[++i] = '\0';
-                       match();
+               case XK_y: /* paste selection */
+                       XConvertSelection(dpy, (ev->state & ShiftMask) ? clip : XA_PRIMARY,
+                                         utf8, utf8, win, CurrentTime);
+                       return;
+               case XK_Return:
+               case XK_KP_Enter:
                        break;
                        break;
+               case XK_bracketleft:
+                       cleanup();
+                       exit(1);
+               default:
+                       return;
+               }
+       else if (ev->state & Mod1Mask)
+               switch(ksym) {
+               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:
-               num = MIN(num, sizeof text);
-               if(num && !iscntrl((int) buf[0])) {
-                       memcpy(text + len, buf, num + 1);
-                       len += num;
-                       match();
-               }
+               if (!iscntrl(*buf))
+                       insert(buf, len);
                break;
                break;
+       case XK_Delete:
+               if (text[cursor] == '\0')
+                       return;
+               cursor = nextrune(+1);
+               /* fallthrough */
        case XK_BackSpace:
        case XK_BackSpace:
-               if(len == 0)
+               if (cursor == 0)
                        return;
                        return;
-               for(i = 1; len - i > 0 && !IS_UTF8_1ST_CHAR(text[len - i]); i++);
-               len -= i;
-               text[len] = '\0';
-               match();
+               insert(NULL, nextrune(-1) - cursor);
                break;
        case XK_End:
                break;
        case XK_End:
-               while(next) {
-                       sel = curr = next;
+               if (text[cursor] != '\0') {
+                       cursor = strlen(text);
+                       break;
+               }
+               if (next) {
+                       /* jump to end of list and position items in reverse */
+                       curr = matchend;
+                       calcoffsets();
+                       curr = prev;
                        calcoffsets();
                        calcoffsets();
+                       while (next && (curr = curr->right))
+                               calcoffsets();
                }
                }
-               while(sel && sel->right)
-                       sel = sel->right;
+               sel = matchend;
                break;
        case XK_Escape:
                break;
        case XK_Escape:
-               exit(EXIT_FAILURE);
+               cleanup();
+               exit(1);
        case XK_Home:
        case XK_Home:
-               sel = curr = item;
+               if (sel == matches) {
+                       cursor = 0;
+                       break;
+               }
+               sel = curr = matches;
                calcoffsets();
                break;
        case XK_Left:
                calcoffsets();
                break;
        case XK_Left:
-       case XK_Up:
-               if(!sel || !sel->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:
+               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)
+               if (!next)
                        return;
                sel = curr = next;
                calcoffsets();
                break;
        case XK_Prior:
                        return;
                sel = curr = next;
                calcoffsets();
                break;
        case XK_Prior:
-               if(!prev)
+               if (!prev)
                        return;
                sel = curr = prev;
                calcoffsets();
                break;
        case XK_Return:
                        return;
                sel = curr = prev;
                calcoffsets();
                break;
        case XK_Return:
-               if(e->state & ShiftMask)
-                       dinput();
-               fprintf(stdout, "%s", sel ? sel->text : text);
-               fflush(stdout);
-               exit(EXIT_SUCCESS);
+       case XK_KP_Enter:
+               puts((sel && !(ev->state & ShiftMask)) ? sel->text : text);
+               if (!(ev->state & ControlMask)) {
+                       cleanup();
+                       exit(0);
+               }
+               if (sel)
+                       sel->out = true;
+               break;
        case XK_Right:
        case XK_Right:
-       case XK_Down:
-               if(!sel || !sel->right)
+               if (text[cursor] != '\0') {
+                       cursor = nextrune(+1);
+                       break;
+               }
+               if (lines > 0)
                        return;
                        return;
-               sel = sel->right;
-               if(sel == next) {
+               /* fallthrough */
+       case XK_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)
-                       strncpy(text, sel->text, sizeof text);
-               dinput();
+               if (!sel)
+                       return;
+               strncpy(text, sel->text, sizeof text - 1);
+               text[sizeof text - 1] = '\0';
+               cursor = strlen(text);
+               match();
                break;
        }
                break;
        }
-       drawbar();
+       drawmenu();
 }
 
 }
 
-void
-match(void) {
-       unsigned int len;
-       Item *i, *itemend, *lexact, *lprefix, *lsubstr, *exactend, *prefixend, *substrend;
-
-       len = strlen(text);
-       item = lexact = lprefix = lsubstr = itemend = exactend = prefixend = substrend = NULL;
-       for(i = allitems; i; i = i->next)
-               if(!fstrncmp(text, i->text, len + 1))
-                       appenditem(i, &lexact, &exactend);
-               else if(!fstrncmp(text, i->text, len))
-                       appenditem(i, &lprefix, &prefixend);
-               else if(fstrstr(i->text, text))
-                       appenditem(i, &lsubstr, &substrend);
-       if(lexact) {
-               item = lexact;
-               itemend = exactend;
-       }
-       if(lprefix) {
-               if(itemend) {
-                       itemend->right = lprefix;
-                       lprefix->left = itemend;
-               }
+static void
+match(void)
+{
+       static char **tokv = NULL;
+       static int tokn = 0;
+
+       char buf[sizeof text], *s;
+       int i, tokc = 0;
+       size_t len;
+       Item *item, *lprefix, *lsubstr, *prefixend, *substrend;
+
+       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 %u bytes\n", tokn * sizeof *tokv);
+       len = tokc ? strlen(tokv[0]) : 0;
+
+       matches = lprefix = lsubstr = matchend = prefixend = substrend = NULL;
+       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(tokv[0], item->text, len + 1))
+                       appenditem(item, &matches, &matchend);
+               else if (!fstrncmp(tokv[0], item->text, len))
+                       appenditem(item, &lprefix, &prefixend);
                else
                else
-                       item = lprefix;
-               itemend = prefixend;
+                       appenditem(item, &lsubstr, &substrend);
        }
        }
-       if(lsubstr) {
-               if(itemend) {
-                       itemend->right = lsubstr;
-                       lsubstr->left = itemend;
-               }
-               else
-                       item = lsubstr;
+       if (lprefix) {
+               if (matches) {
+                       matchend->right = lprefix;
+                       lprefix->left = matchend;
+               } else
+                       matches = lprefix;
+               matchend = prefixend;
+       }
+       if (lsubstr) {
+               if (matches) {
+                       matchend->right = lsubstr;
+                       lsubstr->left = matchend;
+               } else
+                       matches = lsubstr;
+               matchend = substrend;
        }
        }
-       curr = prev = next = sel = item;
+       curr = sel = matches;
        calcoffsets();
 }
 
        calcoffsets();
 }
 
-void
-readstdin(void) {
-       char *p, buf[sizeof text];
-       unsigned int len = 0, max = 0;
-       Item *i, *new;
-
-       i = NULL;
-       while(fgets(buf, sizeof buf, stdin)) {
-               len = strlen(buf);
-               if(buf[len-1] == '\n')
-                       buf[--len] = '\0';
-               if(!(p = strdup(buf)))
-                       eprint("cannot strdup %u bytes\n", len);
-               if((max = MAX(max, len)) == len)
-                       maxname = p;
-               if(!(new = malloc(sizeof *new)))
-                       eprint("cannot malloc %u bytes\n", sizeof *new);
-               new->next = new->left = new->right = NULL;
-               new->text = p;
-               if(!i)
-                       allitems = new;
-               else 
-                       i->next = new;
-               i = new;
+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
+paste(void)
+{
+       char *p, *q;
+       int di;
+       unsigned long dl;
+       Atom da;
+
+       /* we have been given the current selection, now insert it into input */
+       XGetWindowProperty(dpy, win, utf8, 0, (sizeof text / 4) + 1, False,
+                          utf8, &da, &di, &dl, &dl, (unsigned char **)&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, *maxstr = NULL;
+       size_t i, max = 0, 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 %u bytes:", size);
+               if ((p = strchr(buf, '\n')))
+                       *p = '\0';
+               if (!(items[i].text = strdup(buf)))
+                       die("cannot strdup %u bytes:", strlen(buf) + 1);
+               items[i].out = false;
+               if (strlen(items[i].text) > max)
+                       max = strlen(maxstr = items[i].text);
+       }
+       if (items)
+               items[i].text = NULL;
+       inputw = maxstr ? TEXTW(maxstr) : 0;
+       lines = MIN(lines, i);
+}
+
+static void
+run(void)
+{
+       XEvent ev;
+
+       while (!XNextEvent(dpy, &ev)) {
+               if (XFilterEvent(&ev, win))
+                       continue;
+               switch(ev.type) {
+               case Expose:
+                       if (ev.xexpose.count == 0)
+                               drw_map(drw, win, 0, 0, mw, mh);
+                       break;
+               case KeyPress:
+                       keypress(&ev.xkey);
+                       break;
+               case SelectionNotify:
+                       if (ev.xselection.property == utf8)
+                               paste();
+                       break;
+               case VisibilityNotify:
+                       if (ev.xvisibility.state != VisibilityUnobscured)
+                               XRaiseWindow(dpy, win);
+                       break;
+               }
        }
 }
 
        }
 }
 
+static void
+setup(void)
+{
+       int x, y;
+       XSetWindowAttributes swa;
+       XIM xim;
+#ifdef XINERAMA
+       XineramaScreenInfo *info;
+       Window w, pw, dw, *dws;
+       XWindowAttributes wa;
+       int a, j, di, n, i = 0, area = 0;
+       unsigned int du;
+#endif
+
+       /* init appearance */
+       scheme[SchemeNorm].bg = drw_clr_create(drw, normbgcolor);
+       scheme[SchemeNorm].fg = drw_clr_create(drw, normfgcolor);
+       scheme[SchemeSel].bg = drw_clr_create(drw, selbgcolor);
+       scheme[SchemeSel].fg = drw_clr_create(drw, selfgcolor);
+       scheme[SchemeOut].bg = drw_clr_create(drw, outbgcolor);
+       scheme[SchemeOut].fg = drw_clr_create(drw, outfgcolor);
+
+       clip = XInternAtom(dpy, "CLIPBOARD",   False);
+       utf8 = XInternAtom(dpy, "UTF8_STRING", False);
+
+       /* calculate menu geometry */
+       bh = drw->fonts[0]->h + 2;
+       lines = MAX(lines, 0);
+       mh = (lines + 1) * bh;
+#ifdef XINERAMA
+       if ((info = XineramaQueryScreens(dpy, &n))) {
+               XGetInputFocus(dpy, &w, &di);
+               if (mon != -1 && mon < n)
+                       i = mon;
+               if (!i && 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 == -1 && !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]))
+                                       break;
+
+               x = info[i].x_org;
+               y = info[i].y_org + (topbar ? 0 : info[i].height - mh);
+               mw = info[i].width;
+               XFree(info);
+       } else
+#endif
+       {
+               x = 0;
+               y = topbar ? 0 : sh - mh;
+               mw = sw;
+       }
+       promptw = (prompt && *prompt) ? TEXTW(prompt) : 0;
+       inputw = MIN(inputw, mw/3);
+       match();
+
+       /* create menu window */
+       swa.override_redirect = True;
+       swa.background_pixel = scheme[SchemeNorm].bg->pix;
+       swa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
+       win = XCreateWindow(dpy, root, x, y, mw, mh, 0,
+                           DefaultDepth(dpy, screen), CopyFromParent,
+                           DefaultVisual(dpy, screen),
+                           CWOverrideRedirect | CWBackPixel | CWEventMask, &swa);
+
+       /* open input methods */
+       xim = XOpenIM(dpy, NULL, NULL, NULL);
+       xic = XCreateIC(xim, XNInputStyle, XIMPreeditNothing | XIMStatusNothing,
+                       XNClientWindow, win, XNFocusWindow, win, NULL);
+
+       XMapRaised(dpy, win);
+       drw_resize(drw, mw, mh);
+       drawmenu();
+}
+
+static void
+usage(void)
+{
+       fputs("usage: dmenu [-b] [-f] [-i] [-l lines] [-p prompt] [-fn font] [-m monitor]\n"
+             "             [-nb color] [-nf color] [-sb color] [-sf color] [-v]\n", stderr);
+       exit(1);
+}
+
 int
 int
-main(int argc, char *argv[]) {
-       unsigned int i;
+main(int argc, char *argv[])
+{
+       bool fast = false;
+       int i;
 
 
-       /* command line args */
-       progname = "dmenu";
-       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 = false;
+               else if (!strcmp(argv[i], "-f"))   /* grabs keyboard before reading stdin */
+                       fast = true;
+               else if (!strcmp(argv[i], "-i")) { /* case-insensitive item matching */
                        fstrncmp = strncasecmp;
                        fstrstr = cistrstr;
                        fstrncmp = strncasecmp;
                        fstrstr = cistrstr;
-               }
-               else if(!strcmp(argv[i], "-b"))
-                       topbar = False;
-               else if(!strcmp(argv[i], "-l")) {
-                       if(++i < argc) lines = atoi(argv[i]);
-                       if(lines > 0)
-                               calcoffsets = calcoffsetsv;
-               }
-               else if(!strcmp(argv[i], "-fn")) {
-                       if(++i < argc) font = argv[i];
-               }
-               else if(!strcmp(argv[i], "-nb")) {
-                       if(++i < argc) normbgcolor = argv[i];
-               }
-               else if(!strcmp(argv[i], "-nf")) {
-                       if(++i < argc) normfgcolor = argv[i];
-               }
-               else if(!strcmp(argv[i], "-p")) {
-                       if(++i < argc) prompt = argv[i];
-               }
-               else if(!strcmp(argv[i], "-sb")) {
-                       if(++i < argc) selbgcolor = argv[i];
-               }
-               else if(!strcmp(argv[i], "-sf")) {
-                       if(++i < argc) selfgcolor = argv[i];
-               }
-               else if(!strcmp(argv[i], "-v")) {
-                       printf("dmenu-"VERSION", © 2006-2010 dmenu engineers, see LICENSE for details\n");
-                       exit(EXIT_SUCCESS);
-               }
-               else {
-                       fputs("usage: dmenu [-i] [-b] [-l <lines>] [-fn <font>] [-nb <color>]\n"
-                             "             [-nf <color>] [-p <prompt>] [-sb <color>] [-sf <color>] [-v]\n", stderr);
-                       exit(EXIT_FAILURE);
-               }
-       if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
-               fprintf(stderr, "dmenu: warning: no locale support\n");
-       if(!(dpy = XOpenDisplay(NULL)))
-               eprint("cannot open display\n");
-       if(atexit(&cleanup) != 0)
-               eprint("cannot register cleanup\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 */
+                       normbgcolor = argv[++i];
+               else if (!strcmp(argv[i], "-nf"))  /* normal foreground color */
+                       normfgcolor = argv[++i];
+               else if (!strcmp(argv[i], "-sb"))  /* selected background color */
+                       selbgcolor = argv[++i];
+               else if (!strcmp(argv[i], "-sf"))  /* selected foreground color */
+                       selfgcolor = argv[++i];
+               else
+                       usage();
+
+       if (!setlocale(LC_CTYPE, "") || !XSupportsLocale())
+               fputs("warning: no locale support\n", stderr);
+       if (!(dpy = XOpenDisplay(NULL)))
+               die("cannot open display\n");
        screen = DefaultScreen(dpy);
        root = RootWindow(dpy, screen);
        screen = DefaultScreen(dpy);
        root = RootWindow(dpy, screen);
-       if(!(argp = malloc(sizeof *argp * (argc+2))))
-               eprint("cannot malloc %u bytes\n", sizeof *argp * (argc+2));
-       memcpy(argp + 2, argv + 1, sizeof *argp * argc);
-
-       readstdin();
-       grabkeyboard();
-       setup(lines);
-       if(maxname)
-               cmdw = MIN(textw(&dc, maxname), mw / 3);
-       match();
+       sw = DisplayWidth(dpy, screen);
+       sh = DisplayHeight(dpy, screen);
+       drw = drw_create(dpy, screen, root, sw, sh);
+       drw_load_fonts(drw, fonts, LENGTH(fonts));
+       if (!drw->fontcount)
+               die("no fonts could be loaded.\n");
+       drw_setscheme(drw, &scheme[SchemeNorm]);
+
+       if (fast) {
+               grabkeyboard();
+               readstdin();
+       } else {
+               readstdin();
+               grabkeyboard();
+       }
+       setup();
        run();
        run();
-       return 0;
+
+       return 1; /* unreachable */
 }
 }