/* See LICENSE file for copyright and license details. */
#include <X11/XF86keysym.h>
#ifndef _EVDEVK
#define _EVDEVK(_v) (0x10081000 + (_v))
#endif
#include <ctype.h>
#include <fcntl.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <time.h>
#include <unistd.h>

#include <X11/Xlib.h>
#include <X11/Xatom.h>
#include <X11/Xutil.h>
#ifdef XINERAMA
#include <X11/extensions/Xinerama.h>
#endif
#include <X11/Xft/Xft.h>
#include <X11/Xresource.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 TEXTW(X)              (drw_fontset_getwidth(drw, (X)) + lrpad)
#define NUMBERSMAXDIGITS      100
#define NUMBERSBUFSIZE        (NUMBERSMAXDIGITS * 2) + 1

/* enums */
enum { SchemeNorm, SchemeSel, SchemeOut, SchemeNormHighlight, SchemeSelHighlight, SchemeLast }; /* color schemes */

struct item {
	char *text;
	struct item *left, *right;
	int out;
};

static char numbers[NUMBERSBUFSIZE] = "";
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, *nav;
static int mon = -1, screen;
static int use_text_input = 0;
static int initialindex;
static int managed = 0;

static Atom clip, utf8;
static Display *dpy;
static Window root, parentwin, win;
static XIC xic;

static Drw *drw;
static Clr *scheme[SchemeLast];

/* Empty arrays to be filled from command line, Xresources, and defaults, in decreasing order of precedence */
static char *colors[SchemeLast][2];
static const char *fonts[3] = { NULL, NULL, NULL };

#include "config.h"

static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
static char *(*fstrstr)(const char *, const char *) = strstr;

static void
appenditem(struct item *item, struct item **list, struct item **last)
{
	if (*last)
		(*last)->right = item;
	else
		*list = item;

	item->left = *last;
	item->right = NULL;
	*last = item;
}

static void
calcoffsets(void)
{
	int i, n;

	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;
	for (i = 0, prev = curr; prev && prev->left; prev = prev->left)
		if ((i += (lines > 0) ? bh : MIN(TEXTW(prev->left->text), n)) > n)
			break;
}

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;
}

static Window prevfocuswin = None;

static int
ignore_xerror(Display *d, XErrorEvent *ee)
{
	(void)d;
	(void)ee;
	return 0;
}

static void
cleanup(void)
{
	size_t i;

	if (xic) {
		XUnsetICFocus(xic);
		XDestroyIC(xic);
		xic = NULL;
	}
	XUngrabKey(dpy, AnyKey, AnyModifier, root);
	XSetErrorHandler(ignore_xerror);
	if (prevfocuswin && prevfocuswin != win && prevfocuswin != PointerRoot)
		XSetInputFocus(dpy, prevfocuswin, RevertToParent, CurrentTime);
	for (i = 0; i < SchemeLast; i++)
		free(scheme[i]);
	drw_free(drw);
	XSync(dpy, False);
	XCloseDisplay(dpy);
}

static char *
cistrstr(const char *s, const char *sub)
{
	size_t len;

	for (len = strlen(sub); *s; s++)
		if (!strncasecmp(s, sub, len))
			return (char *)s;
	return NULL;
}

static void
drawhighlights(struct item *item, int x, int y, int maxw)
{
	char restorechar, tokens[sizeof text], *highlight,  *token;
	int indentx, highlightlen;

	drw_setscheme(drw, scheme[item == sel ? SchemeSelHighlight : SchemeNormHighlight]);
	strcpy(tokens, text);
	for (token = strtok(tokens, " "); token; token = strtok(NULL, " ")) {
		highlight = fstrstr(item->text, token);
		while (highlight) {
			// Move item str end, calc width for highlight indent, & restore
			highlightlen = highlight - item->text;
			restorechar = *highlight;
			item->text[highlightlen] = '\0';
			indentx = TEXTW(item->text);
			item->text[highlightlen] = restorechar;

			// Move highlight str end, draw highlight, & restore
			restorechar = highlight[strlen(token)];
			highlight[strlen(token)] = '\0';
			drw_text(
				drw,
				x + indentx - (lrpad / 2) - 1,
				y,
				MIN(maxw - indentx, TEXTW(highlight) - lrpad),
				bh, 0, highlight, 0
			);
			highlight[strlen(token)] = restorechar;

			if (strlen(highlight) - strlen(token) < strlen(token)) break;
			highlight = fstrstr(highlight + strlen(token), token);
		}
	}
}

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
		drw_setscheme(drw, scheme[SchemeNorm]);

	int r = drw_text(drw, x, y, w, bh, lrpad / 2, item->text, 0);
	drawhighlights(item, x, y, w);
	return r;
}

static void
recalculatenumbers()
{
	unsigned int numer = 0, denom = 0;
	struct item *item;
	if (matchend) {
		numer++;
		for (item = matchend; item && item->left; item = item->left)
			numer++;
	}
	for (item = items; item && item->text; item++)
		denom++;
	if (numer == denom)
		snprintf(numbers, NUMBERSBUFSIZE, "%d", numer);
	else
		snprintf(numbers, NUMBERSBUFSIZE, "%d/%d", numer, denom);
}

static void
drawmenu(void)
{
	static int curpos, oldcurlen;
	struct item *item;
	int x = 0, y = 0, fh = drw->fonts->h, w;
	int curlen, rcurlen;

	drw_setscheme(drw, scheme[SchemeNorm]);
	drw_rect(drw, 0, 0, mw, mh, 1, 1);

	/* draw top search bar background in SchemeOut (#383838) */
	drw_setscheme(drw, scheme[SchemeOut]);
	drw_rect(drw, 0, 0, mw, bh, 1, 1);

	if (prompt && *prompt) {
		if (colorprompt)
			drw_setscheme(drw, scheme[SchemeSel]);
		x = drw_text(drw, x, 0, promptw, bh, lrpad / 2, prompt, 0);
	}

	recalculatenumbers();

	/* draw input field */
	w = (lines > 0 || !matches) ? mw - x : inputw;
	w -= lrpad / 2;
	x += lrpad / 2;

	rcurlen = drw_fontset_getwidth(drw, text + cursor);
	curlen = drw_fontset_getwidth(drw, text) - rcurlen;
	curpos += curlen - oldcurlen;
	curpos = MIN(w - TEXTW(numbers), MAX(0, curpos));
	curpos = MAX(curpos, w - rcurlen - TEXTW(numbers));
	curpos = MIN(curpos, curlen);
	oldcurlen = curlen;

	drw_setscheme(drw, scheme[SchemeOut]);
	drw_text_align(drw, x, 0, curpos, bh, text, cursor, AlignR);
	drw_text_align(drw, x + curpos, 0, w - curpos - TEXTW(numbers), bh, text + cursor, strlen(text) - cursor, AlignL);
	drw_rect(drw, x + curpos - 1, 2 + (bh - fh) / 2, 2, fh - 4, 1, 0);

	if (lines > 0) {
		/* draw vertical list */
		x -= lrpad / 2;
		for (item = curr; item != next; item = item->right)
			drawitem(item, 0, y += bh, mw);
	} 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, MIN(TEXTW(item->text), mw - x - TEXTW(">") - TEXTW(numbers)));
		if (next) {
			w = TEXTW(">");
			drw_setscheme(drw, scheme[SchemeNorm]);
			drw_text(drw, mw - w - TEXTW(numbers), 0, w, bh, lrpad / 2, ">", 0);
		}
	}
	drw_setscheme(drw, scheme[SchemeOut]);
	drw_text(drw, mw - TEXTW(numbers), 0, TEXTW(numbers), bh, lrpad / 2, numbers, 0);
	drw_map(drw, win, 0, 0, mw, mh);
}

static void
grabfocus(void)
{
	struct timespec ts = { .tv_sec = 0, .tv_nsec = 1000000  };
	Window focuswin;
	int i, revertwin;

	for (i = 0; i < 100; ++i) {
		XGetInputFocus(dpy, &focuswin, &revertwin);
		if (focuswin == win)
			return;
		if (!prevfocuswin && focuswin != None && focuswin != PointerRoot)
			prevfocuswin = focuswin;
		XSetInputFocus(dpy, win, RevertToParent, CurrentTime);
		XGetInputFocus(dpy, &focuswin, &revertwin);
		if (focuswin == win)
			return;
		nanosleep(&ts, NULL);
	}
	die("cannot grab focus");
}

static void
grabkeyboard(void)
{
	struct timespec ts = { .tv_sec = 0, .tv_nsec = 1000000  };
	int i;

	if (embed || managed)
		return;
	/* 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);
	}
	die("cannot grab keyboard");
}

static void
match(void)
{
	static char **tokv = NULL;
	static int tokn = 0;

	char buf[sizeof text], *s;
	int i, tokc = 0;
	size_t len, textsize;
	struct 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:", tokn * sizeof *tokv);
	len = tokc ? strlen(tokv[0]) : 0;

	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;
	}
	if (lsubstr) {
		if (matches) {
			matchend->right = lsubstr;
			lsubstr->left = matchend;
		} else
			matches = lsubstr;
		matchend = substrend;
	}
	curr = sel = matches;
	calcoffsets();
}

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();
}

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);
	}
}

static void
keypress(XKeyEvent *ev)
{
	char buf[32];
	int len;
	KeySym ksym;
	Status status;

	ksym = NoSymbol;
	if (xic && ev->keycode == 0)
		len = Xutf8LookupString(xic, ev, buf, sizeof buf, &ksym, &status);
	else {
		len = XLookupString(ev, buf, sizeof buf, &ksym, NULL);
		status = (len > 0 && ksym != NoSymbol) ? XLookupBoth :
		         (len > 0) ? XLookupChars :
		         (ksym != NoSymbol) ? XLookupKeySym : XLookupNone;
	}
	switch (status) {
	default: /* XLookupNone, XBufferOverflow */
		return;
	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;
		case XK_u: /* delete left */
			insert(NULL, 0 - cursor);
			break;
		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;
		case XK_y: /* paste selection */
		case XK_Y:
			XConvertSelection(dpy, (ev->state & ShiftMask) ? clip : XA_PRIMARY,
			                  utf8, utf8, win, CurrentTime);
			return;
		case XK_Left:
			movewordedge(-1);
			goto draw;
		case XK_Right:
			movewordedge(+1);
			goto draw;
		case XK_Return:
		case XK_KP_Enter:
			break;
		case XK_bracketleft:
			cleanup();
			exit(1);
		default:
			return;
		}
	} else if (ev->state & Mod1Mask) {
		switch(ksym) {
		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:
insert:
		if (!iscntrl(*buf))
			insert(buf, len);
		break;
	case XK_Delete:
		if (text[cursor] == '\0')
			return;
		cursor = nextrune(+1);
		/* fallthrough */
	case XK_BackSpace:
		if (cursor == 0)
			return;
		insert(NULL, nextrune(-1) - cursor);
		break;
	case XK_End:
		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();
			while (next && (curr = curr->right))
				calcoffsets();
		}
		sel = matchend;
		break;
	case XK_Escape:
	case XF86XK_PowerOff:
		cleanup();
		exit(1);
	case XF86XK_Back:
	case XF86XK_KbdLcdMenu2:
		return;
	case XK_Home:
		if (sel == matches) {
			cursor = 0;
			break;
		}
		sel = curr = matches;
		calcoffsets();
		break;
	case XK_Left:
		if (cursor > 0 && (!sel || !sel->left || lines > 0)) {
			cursor = nextrune(-1);
			break;
		}
		if (lines > 0)
			return;
		/* fallthrough */
	case XF86XK_AudioRaiseVolume:
	case XK_Up:
		if (sel && sel->left) {
			sel = sel->left;
			if (sel->right == curr) {
				curr = prev;
				calcoffsets();
			}
		} else if (wrap_around) {
			// if there is no previous item, jump to the bottom of the list
			curr = matchend;
			calcoffsets();
			curr = prev;
			calcoffsets();
			while (next && (curr = curr->right))
				calcoffsets();
			sel = matchend;
		}
		break;
	case XK_Next:
		if (!next)
			return;
		sel = curr = next;
		calcoffsets();
		break;
	case XK_Prior:
		if (!prev)
			return;
		sel = curr = prev;
		calcoffsets();
		break;
	case XK_Menu:
	case XF86XK_KbdLcdMenu1:
		return;
	case XF86XK_Phone:
	case XF86XK_PickupPhone:
	case XK_Return:
	case XK_KP_Enter:
		if (use_text_input)
			puts((sel && (ev->state & ShiftMask)) ? sel->text : text);
		else
			puts((sel && !(ev->state & ShiftMask)) ? sel->text : text);
		if (!(ev->state & ControlMask)) {
			cleanup();
			exit(0);
		}
		if (sel)
			sel->out = 1;
		break;
	case XK_Right:
		if (text[cursor] != '\0') {
			cursor = nextrune(+1);
			break;
		}
		if (lines > 0)
			return;
		/* fallthrough */
	case XF86XK_AudioLowerVolume:
	case XK_Down:
		if (sel && sel->right) {
			sel = sel->right;
			if (sel == next) {
				curr = next;
			}
		} else if (wrap_around) {
			// if there is no next item, jump to the top of the list
			sel = curr = matches;
		}
		calcoffsets();
		break;
	case XK_Tab:
		if (!sel)
			return;
		strncpy(text, sel->text, sizeof text - 1);
		text[sizeof text - 1] = '\0';
		cursor = strlen(text);
		match();
		break;
	}

draw:
	drawmenu();
}

static void
motionnotify(XEvent *e)
{
	struct item *item;
	XMotionEvent *ev = &e->xmotion;
	int y = 0, h = bh;
        char *pageup = "Page up",  *pagedown = "Page down";
        char *gotop = "Go to top",  *gobottom = "Go to bottom";
        char *alreadytop = "Already at top",  *alreadybottom = "Already at bottom";

	if (ev->window != win){
		return;
	}

	if (ev->state & ~Button1Mask)
		return;

	if (lines > 0) {
		/* vertical list: (ctrl)left-click on item */
		for (item = curr; item != next; item = item->right) {
			y += h;
			if (ev->y >= y && ev->y <= (y + h)) {
				sel = item;
				drawmenu();
				return;
			}
		}
		/* display page up/down or jump top/bottom as appropriate */
		if(ev->y > mh || ev->y < 0){
			if (ev->y >= (mh)  && ev->y <= (mh + bh*scrollregion )) {
				nav->text = next ? pagedown : alreadybottom;
				drw_setscheme(drw, scheme[SchemeSel]);
				y=mh-bh;
			} else if (ev->y >= (mh + bh*scrollregion ) && ev->y < (mh + bh*scrollregion*2 )) {
				nav->text = next ? gobottom : alreadybottom;
				drw_setscheme(drw, scheme[SchemeSel]);
				y=mh-bh;
			} else if (ev->y >= (0 - h*scrollregion)  && ev->y <= (0)) {
				nav->text = curr != matches ? pageup : alreadytop;
				drw_setscheme(drw, scheme[SchemeSel]);
				y=0+bh;
			} else if (ev->y >= (0 - h*scrollregion*2) && ev->y <= (0 - h*scrollregion)) {
				nav->text = curr != matches ? gotop : alreadytop;
				drw_setscheme(drw, scheme[SchemeSel]);
				y=0+bh;
			} else {
				drawmenu();
				return;
			}
			drw_setscheme(drw, scheme[SchemeOut]);
			drw_text(drw, 0, y, mw, bh, lrpad / 2, nav->text, 0);
			drw_map(drw, win, 0, 0, mw, mh);
			XFlush(dpy);
			return;
		}
	}
	return;
}


static void
buttonpress(XEvent *e)
{
	struct item *item;
	XButtonPressedEvent *ev = &e->xbutton;
	int x = 0, y = 0, h = bh, w;

	if (ev->window != win)
		return;

	/* right-click: exit */
	if (ev->button == Button3)
		exit(1);

	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;
	}
	/* jump to top */
	if (ev->y >= (0 - h*scrollregion*2) && ev->y <= (0 - h*scrollregion)) {
		sel = curr = matches;
		calcoffsets();
		drawmenu();
		return;
	}
	/* scroll up */
	if (    (ev->button == Button4 && prev)
	     || (ev->y >= (0 - h*scrollregion)  && ev->y <= (0))
			) {
		sel = curr = prev;
		calcoffsets();
		drawmenu();
		return;
	}
	/* scroll down */
	if (    (ev->button == Button5 && next)
	     || (ev->y >= (mh)  && ev->y <= (mh + bh*scrollregion ))
	) {
		if(next)
			sel = curr = next;
		calcoffsets();
		drawmenu();
		return;
	}
	/* jump to bottom */
	if (ev->y >= (mh + bh*scrollregion ) && ev->y < (mh + bh*scrollregion*2 )) {
		if (next) {
			/* jump to end of list and position items in reverse */
			curr = matchend;
			calcoffsets();
			curr = prev;
			calcoffsets();
			while (next && (curr = curr->right))
				calcoffsets();
		}
		sel = matchend;
		drawmenu();
		return;
	}

	if (ev->button != Button1)
		return;
	if (ev->state & ~ControlMask & ~Button1Mask)
		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;
		}
	}
}

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, imax = 0, size = 0;
	unsigned int tmpmax = 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 = 0;
		if (lines == 0 && !centered) {
			drw_font_getexts(drw->fonts, buf, strlen(buf), &tmpmax, NULL);
			if (tmpmax > inputw) {
				inputw = tmpmax;
				imax = i;
			}
		}
	}
	if (items)
		items[i].text = NULL;
	inputw = (items && lines == 0 && !centered) ? TEXTW(items[imax].text) : 0;
	lines = MIN(lines, i);
}

#include <poll.h>

static int
issoftkey(unsigned int keycode)
{
	/* X11 keycodes: Power=124, Menu(Left Softkey)=135, Back(Right Softkey)=166, Phone(Call)=177 */
	return keycode == 124 || keycode == 135 || keycode == 166 || keycode == 177;
}

static long long
dmenu_now_ms(void)
{
	struct timespec ts;
	clock_gettime(CLOCK_MONOTONIC, &ts);
	return (long long)ts.tv_sec * 1000LL + (long long)(ts.tv_nsec / 1000000L);
}

static void
write_softkey_suppress(long long until_ms)
{
	char buf[32];
	int fd = open("/tmp/sxmo_softkey_suppress", O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC, 0644);
	if (fd >= 0) {
		int len = snprintf(buf, sizeof(buf), "%lld\n", until_ms);
		(void)write(fd, buf, len);
		close(fd);
	}
}

static int
query_softkeys_down(void)
{
	char km[32];
	int mask = 0;
	if (!XQueryKeymap(dpy, km))
		return 0;
	if (km[135 / 8] & (1 << (135 % 8)))
		mask |= 1;
	if (km[166 / 8] & (1 << (166 % 8)))
		mask |= 2;
	return mask;
}

static void
read_softkey_state(int *mask_out, long long *ms_out)
{
	char buf[64];
	int fd = open("/tmp/sxmo_softkey_state", O_RDONLY | O_CLOEXEC);
	*mask_out = 0;
	*ms_out = 0;
	if (fd >= 0) {
		ssize_t n = read(fd, buf, sizeof(buf) - 1);
		close(fd);
		if (n > 0) {
			buf[n] = '\0';
			sscanf(buf, "%d %lld", mask_out, ms_out);
		}
	}
}

static void
clear_softkey_state(void)
{
	int fd = open("/tmp/sxmo_softkey_state", O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC, 0644);
	if (fd >= 0) {
		(void)write(fd, "0 0\n", 4);
		close(fd);
	}
}

static void
spawn_xdrawer_and_exit(void)
{
	clear_softkey_state();
	write_softkey_suppress(dmenu_now_ms() + 500);
	cleanup();
	if (fork() == 0) {
		int nullfd = open("/dev/null", O_RDWR);
		if (nullfd >= 0) {
			dup2(nullfd, 0);
			dup2(nullfd, 1);
			dup2(nullfd, 2);
			if (nullfd > 2)
				close(nullfd);
		}
		setsid();
		execlp("xdrawer", "xdrawer", (char *)NULL);
		execl("/home/user/.local/bin/xdrawer", "xdrawer", (char *)NULL);
		execl("/usr/bin/xdrawer", "xdrawer", (char *)NULL);
		_exit(0);
	}
	exit(1);
}

static void
run(void)
{
	XEvent ev;
	int soft_pending = 0;
	long long soft_deadline = 0;
	long long start_ignore = dmenu_now_ms() + 40;
	int initial_released = (query_softkeys_down() == 0);
	int init_soft_mask = 0;
	long long init_soft_ms = 0;
	int xfd = ConnectionNumber(dpy);

	read_softkey_state(&init_soft_mask, &init_soft_ms);

	for (;;) {
		if (!initial_released && query_softkeys_down() == 0)
			initial_released = 1;
		while (XPending(dpy)) {
			if (XNextEvent(dpy, &ev))
				return;
			if (!initial_released && query_softkeys_down() == 0)
				initial_released = 1;
			if (ev.type == KeyPress || ev.type == KeyRelease) {
				KeySym ks = XLookupKeysym(&ev.xkey, 0);
				int is_left = (ks == XK_Menu || ks == XF86XK_KbdLcdMenu1 || ev.xkey.keycode == 135);
				int is_right = (ks == XF86XK_Back || ks == XF86XK_KbdLcdMenu2 || ev.xkey.keycode == 166);
				if (is_left || is_right) {
					long long now = dmenu_now_ms();
					int which = (is_left ? 1 : 0) | (is_right ? 2 : 0);
					if (ev.type == KeyPress && init_soft_mask != 0 &&
					    (init_soft_mask | which) == 3 &&
					    (now - init_soft_ms) <= 320) {
						spawn_xdrawer_and_exit();
					}
					if (ev.type == KeyRelease) {
						initial_released = 1;
						continue;
					}
					if (!initial_released || now < start_ignore)
						continue;
					soft_pending |= which | query_softkeys_down();
					if (soft_pending == 3)
						spawn_xdrawer_and_exit();
					if (soft_deadline == 0)
						soft_deadline = now + 30;
					continue;
				}
				if (!issoftkey(ev.xkey.keycode)) {
					ev.xkey.window = win;
					if (XFilterEvent(&ev, None))
						continue;
				}
			} else if (XFilterEvent(&ev, None)) {
				continue;
			}
			switch(ev.type) {
			case MotionNotify:
				motionnotify(&ev);
				break;
			case ButtonRelease:
				buttonpress(&ev);
				break;
			case DestroyNotify:
				if (ev.xdestroywindow.window != win)
					break;
				cleanup();
				exit(1);
			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();
				if (xic)
					XSetICFocus(xic);
				break;
			case KeyPress:
				keypress(&ev.xkey);
				break;
			case SelectionNotify:
				if (ev.xselection.property == utf8)
					paste();
				break;
			}
		}

		if (soft_pending && soft_deadline > 0) {
			long long now = dmenu_now_ms();
			int hw_down = query_softkeys_down();
			soft_pending |= hw_down;
			if (soft_pending == 3)
				spawn_xdrawer_and_exit();
			long long rem = soft_deadline - now;
			if (rem <= 0) {
				clear_softkey_state();
				write_softkey_suppress(now + 250);
				if (soft_pending == 1) {
					puts((sel) ? sel->text : text);
					cleanup();
					exit(0);
				} else {
					cleanup();
					exit(1);
				}
			}
			struct pollfd pfd = { xfd, POLLIN, 0 };
			poll(&pfd, 1, (int)rem);
		} else {
			struct pollfd pfd = { xfd, POLLIN, 0 };
			poll(&pfd, 1, initial_released ? -1 : 40);
		}
	}
}

static void
setup(void)
{
	int x, y, i, j;
	unsigned int du;
	XSetWindowAttributes swa;
	XIM xim;
	Window w, dw, *dws;
	XWindowAttributes wa;
	XClassHint ch = {"dmenu", "dmenu"};
#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, (const char**)colors[j], 2);
	}
	for (j = 0; j < SchemeLast; ++j) {
		free(colors[j][ColFg]);
		free(colors[j][ColBg]);
	}

	clip = XInternAtom(dpy, "CLIPBOARD",   False);
	utf8 = XInternAtom(dpy, "UTF8_STRING", False);

	/* calculate menu geometry */
	const int bar_h = 24;
	bh = drw->fonts->h + 2;
	bh = MAX(bh, lineheight);
	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))) {
		int avail_h;
		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]))
					break;

		avail_h = MAX((int)bh * 2, (int)info[i].height - bar_h);
		if (lines > 0 && (int)mh > avail_h) {
			lines = MAX(1, (avail_h / (int)bh) - 1);
			mh = (lines + 1) * bh;
		}
		x = info[i].x_org;
		mw = info[i].width;
		y = info[i].y_org + (topbar ? bar_h : MAX(bar_h, (int)info[i].height - (int)mh));

		XFree(info);
	} else
#endif
	{
		int avail_h;
		if (!XGetWindowAttributes(dpy, parentwin, &wa))
			die("could not get embedding window attributes: 0x%lx",
			    parentwin);

		avail_h = MAX((int)bh * 2, (int)wa.height - bar_h);
		if (lines > 0 && (int)mh > avail_h) {
			lines = MAX(1, (avail_h / (int)bh) - 1);
			mh = (lines + 1) * bh;
		}
		x = 0;
		mw = wa.width;
		y = topbar ? bar_h : MAX(bar_h, (int)wa.height - (int)mh);
	}
	inputw = MIN(inputw, mw/3);
	match();

	/* create menu window */
	swa.override_redirect = managed ? False : True;
	swa.background_pixel = scheme[SchemeNorm][ColBg].pixel;
	swa.event_mask = ExposureMask | KeyPressMask | KeyReleaseMask | ButtonPressMask | ButtonReleaseMask | ButtonMotionMask;
	win = XCreateWindow(dpy, parentwin, x, y, mw, mh, border_width,
	                    CopyFromParent, CopyFromParent, CopyFromParent,
	                    CWOverrideRedirect | CWBackPixel | CWEventMask, &swa);
	XSetWindowBorder(dpy, win, scheme[SchemeSel][ColBg].pixel);
	XSetClassHint(dpy, win, &ch);

	drw_resize(drw, mw, mh);
	calcoffsets();

	for (i = 0; i < initialindex; i++) {
		if (sel && sel->right && (sel = sel->right) == next) {
			curr = next;
			calcoffsets();
		}
	}

	XMapRaised(dpy, win);
	drawmenu();
	XFlush(dpy);

	if (managed) {
		XTextProperty prop;
		char *windowtitle = prompt != NULL ? (char *)prompt : "dmenu";
		Xutf8TextListToTextProperty(dpy, &windowtitle, 1, XUTF8StringStyle, &prop);
		XSetWMName(dpy, win, &prop);
		XSetTextProperty(dpy, win, &prop, XInternAtom(dpy, "_NET_WM_NAME", False));
		XFree(prop.value);
	} else {
		grabkeyboard();
		grabfocus();
	}

	/* input methods */
	XSetLocaleModifiers("");
	if ((xim = XOpenIM(dpy, NULL, NULL, NULL)) == NULL) {
		XSetLocaleModifiers("@im=local");
		if ((xim = XOpenIM(dpy, NULL, NULL, NULL)) == NULL) {
			XSetLocaleModifiers("@im=");
			xim = XOpenIM(dpy, NULL, NULL, NULL);
		}
	}

	if (xim) {
		xic = XCreateIC(xim, XNInputStyle, XIMPreeditNothing | XIMStatusNothing,
		                XNClientWindow, win, XNFocusWindow, win, NULL);
		if (xic)
			XSetICFocus(xic);
	}

	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();
	}

	if (!(nav = malloc(sizeof *nav)))
		die("cannot malloc %u bytes:", sizeof *nav);
	nav->out = 1;

}

static void
usage(void)
{
	fputs("usage: dmenu [-bfiv] [-l lines] [-H height] [-p prompt] [-fn font] [-m monitor]\n"
	      "             [-nb color] [-nf color] [-sb color] [-sf color] [-w windowid]\n", stderr);
	exit(1);
}

void
readxresources(void) {
	XrmInitialize();

	char* xrm;
	if ((xrm = XResourceManagerString(drw->dpy))) {
		char *type;
		XrmDatabase xdb = XrmGetStringDatabase(xrm);
		XrmValue xval;

		if (XrmGetResource(xdb, "dmenu.font", "*", &type, &xval) && !fonts[0])
			fonts[0] = strdup(xval.addr);

		if (XrmGetResource(xdb, "dmenu.background", "*", &type, &xval) && !colors[SchemeNorm][ColBg] )
			colors[SchemeNorm][ColBg] = strdup(xval.addr);
		if (XrmGetResource(xdb, "dmenu.foreground", "*", &type, &xval) && !colors[SchemeNorm][ColFg] )
			colors[SchemeNorm][ColFg] = strdup(xval.addr);

		if (XrmGetResource(xdb, "dmenu.selbackground", "*", &type, &xval) && !colors[SchemeSel][ColBg] )
			colors[SchemeSel][ColBg] = strdup(xval.addr);
		if (XrmGetResource(xdb, "dmenu.selforeground", "*", &type, &xval) && !colors[SchemeSel][ColFg] )
			colors[SchemeSel][ColFg] = strdup(xval.addr);

		if (XrmGetResource(xdb, "dmenu.selhighlightbackground", "*", &type, &xval) && !colors[SchemeSelHighlight][ColBg] )
			colors[SchemeSelHighlight][ColBg] = strdup(xval.addr);
		if (XrmGetResource(xdb, "dmenu.selhighlightforeground", "*", &type, &xval) && !colors[SchemeSelHighlight][ColFg] )
			colors[SchemeSelHighlight][ColFg] = strdup(xval.addr);

		if (XrmGetResource(xdb, "dmenu.highlightbackground", "*", &type, &xval) && !colors[SchemeNormHighlight][ColBg] )
			colors[SchemeNormHighlight][ColBg] = strdup(xval.addr);
		if (XrmGetResource(xdb, "dmenu.highlightforeground", "*", &type, &xval) && !colors[SchemeNormHighlight][ColFg] )
			colors[SchemeNormHighlight][ColFg] = strdup(xval.addr);

		if (XrmGetResource(xdb, "dmenu.outbackground", "*", &type, &xval) && !colors[SchemeOut][ColBg] )
			colors[SchemeOut][ColBg] = strdup(xval.addr);
		if (XrmGetResource(xdb, "dmenu.outforeground", "*", &type, &xval) && !colors[SchemeOut][ColFg] )
			colors[SchemeOut][ColFg] = strdup(xval.addr);

		XrmDestroyDatabase(xdb);
	}
}

int
main(int argc, char *argv[])
{
	XWindowAttributes wa;
	int i, fast = 0;

	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], "-nc"))   /* prevents centering dmenu on screen */
			centered = 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;
		} else if (!strcmp(argv[i], "-t")) /* favors text input over selection */
			use_text_input = 1;
		else if (!strcmp(argv[i], "-wm")) { /* display as managed wm window */
			managed = 1;
		} 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], "-H")) {
			lineheight = atoi(argv[++i]);
			lineheight = MAX(lineheight, min_lineheight);
		}
		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] = strdup(argv[++i]);
		else if (!strcmp(argv[i], "-nb"))  /* normal background color */
			colors[SchemeNorm][ColBg] = strdup(argv[++i]);
		else if (!strcmp(argv[i], "-nf"))  /* normal foreground color */
			colors[SchemeNorm][ColFg] = strdup(argv[++i]);
		else if (!strcmp(argv[i], "-sb"))  /* selected background color */
			colors[SchemeSel][ColBg]  = strdup(argv[++i]);
		else if (!strcmp(argv[i], "-sf"))  /* selected foreground color */
			colors[SchemeSel][ColFg]  = strdup(argv[++i]);
		else if (!strcmp(argv[i], "-w"))   /* embedding window id */
			embed = argv[++i];
		else if ((!strcmp(argv[i], "--index")) || (!strcmp(argv[i], "-I"))) /* initial index selection, 0-indexed (bemenu compatible) */
			initialindex = atoi(argv[++i]);
		else if (!strcmp(argv[i], "-idx")) /* initial index selection, 1-indexed */
			initialindex = atoi(argv[++i]) - 1;
		else
			usage();

	if (getenv("DMENU_WRAP_AROUND"))
		wrap_around = 1;

	if (!setlocale(LC_CTYPE, "") || !XSupportsLocale())
		fputs("warning: no locale support\n", stderr);
	XSetLocaleModifiers("");
	if (!(dpy = XOpenDisplay(NULL)))
		die("cannot open display");
	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);
	drw = drw_create(dpy, screen, root, wa.width, wa.height);

	/* Apply defaults to font and colors*/
	if (!fonts[0]) {
		fonts[0] = defaultfonts[0];
		fonts[1] = defaultfonts[1];
	} else {
		fonts[1] = defaultfonts[1];
	}
	for (i = 0; i < SchemeLast; ++i){
		if ( !colors[i][ColBg] )
		   colors[i][ColBg] = strdup(defaultcolors[i][ColBg]);
		if ( !colors[i][ColFg] )
		   colors[i][ColFg] = strdup(defaultcolors[i][ColFg]);
	}

	if (!drw_fontset_create(drw, fonts, 2))
		die("no fonts could be loaded.");

	lrpad = drw->fonts->h / 2;

#ifdef __OpenBSD__
	if (pledge("stdio rpath", NULL) == -1)
		die("pledge");
#endif

	readstdin();
	setup();
	run();

	return 1; /* unreachable */
}