dmenu.c

/* See LICENSE file for copyright and license details. */
#include <ctype.h>
#include <locale.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <time.h>
#include <unistd.h>
#include <X11/cursorfont.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 "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)

/* enums */
enum { CurNormal, CurPointer, CurText, CurLast }; /* cursor */
enum { SchemeNorm, SchemeSel, SchemeNormOut, SchemeSelOut,
			 SchemeNormHighlight, SchemeSelHighlight, SchemeNormOutHighlight, SchemeSelOutHighlight,
			 SchemeBorder, SchemePrompt, SchemeLast }; /* color schemes */
typedef enum { UIInput, UIItems, UISymbolLeft, UISymbolRight, UILast } UIPart; /* ui parts */

struct item {
	int index;
	char *text;
	char *text_output;
	struct item *left, *right;
	double distance;
};

typedef struct
{
	int x;
	int y;
	int w;
	int h;
} Rect;

static char text[BUFSIZ] = "";
static char *embed;
static char separator;
static int separator_greedy;
static int separator_reverse;
static int bh, mw, mh;
static int inputw = 0, promptw, passwd = 0;
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 int *selected_items = NULL;
static unsigned int selected_items_size = 0;

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

static Drw *drw;
static Cur *mouse_cursor[CurLast];
static Clr *scheme[SchemeLast];

#include "config.h"

static char * cistrstr(const char *h, const char *n);
static int (*fstrncmp)(const char *, const char *, size_t) = strncasecmp;
static char *(*fstrstr)(const char *, const char *) = cistrstr;

static void
select_item(const struct item * const item)
{
	for (int i = 0;i < selected_items_size;i++)
		if (selected_items[i] == -1) {
			selected_items[i] = sel->index;
			return;
		}
	selected_items_size++;
	selected_items = realloc(selected_items, (selected_items_size + 1) * sizeof(size_t));
	selected_items[selected_items_size - 1] = sel->index;
}

static void
unselect_item(const struct item * const item)
{
	for (int i = 0;i < selected_items_size;i++)
		if (selected_items[i] == sel->index) {
			selected_items[i] = -1;
			return;
		}
}

static int
is_selected(const struct item * const item)
{
	for (int i = 0;i < selected_items_size;i++)
		if (selected_items[i] == item->index)
			return 1;
	return 0;
}

static void
toggle_selected(const struct item * const item)
{
	if (!item)
		return;
	if(is_selected(item))
		unselect_item(item);
	else
		select_item(item);
}

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(symbol_left) + TEXTW(symbol_right));
	/* 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 void
cleanup(void)
{
	size_t i;

	XUngrabKey(dpy, AnyKey, AnyModifier, root);
	for (i = 0; i < CurLast; i++)
		drw_cur_free(drw, mouse_cursor[i]);
	for (i = 0; i < SchemeLast; i++)
		free(scheme[i]);
	drw_free(drw);
	XSync(dpy, False);
	XCloseDisplay(dpy);
	free(selected_items);
}

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;
	}
	return NULL;
}

static void
drawhighlights(struct item *item, int x, int y, int maxw)
{
	int i, indent;
	char *highlight;
	char c;

	if (!(strlen(item->text) && strlen(text)))
		return;

	if (item == sel && is_selected(item))
		drw_setscheme(drw, scheme[SchemeSelOutHighlight]);
	else if (item == sel)
		drw_setscheme(drw, scheme[SchemeSelHighlight]);
	else if (is_selected(item))
		drw_setscheme(drw, scheme[SchemeNormOutHighlight]);
	else
		drw_setscheme(drw, scheme[SchemeNormHighlight]);

	for (i = 0, highlight = item->text; *highlight && text[i];) {
		if (!fstrncmp(highlight, text+i, 1)) {
			/* get indentation */
			c = *highlight;
			*highlight = '\0';
			indent = TEXTW(item->text);
			*highlight = c;

			/* highlight character */
			c = highlight[1];
			highlight[1] = '\0';
			drw_text(
				drw,
				x + indent - (lrpad / 2) - (lrpad % 2),
				y,
				MIN(maxw - indent, TEXTW(highlight) - lrpad),
				bh, 0, highlight, 0
			);
			highlight[1] = c;
			i++;
		}
		highlight++;
	}
}


static int
drawitem(struct item *item, int x, int y, int w)
{
	int r;
	if (item == sel && is_selected(item))
		drw_setscheme(drw, scheme[SchemeSelOut]);
	else if (item == sel)
		drw_setscheme(drw, scheme[SchemeSel]);
	else if (is_selected(item))
		drw_setscheme(drw, scheme[SchemeNormOut]);
	else
		drw_setscheme(drw, scheme[SchemeNorm]);

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

static void
drawmenu(void)
{
	static Input input;
	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[SchemePrompt]);
		x = drw_text(drw, x, 0, promptw, bh, lrpad / 2, prompt, 0);
	}

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

	input.cursor = cursor;
	input.text = text;

	if (passwd) {
	  input.text = ecalloc(1, sizeof(text));
		memset(input.text, '*', strlen(text));
	};

	drw_setscheme(drw, scheme[SchemeNorm]);
	drw_input_text(drw, x, 0, w, bh, lrpad, &input);

	if(passwd) {
		free(input.text);
	}

	if (lines > 0) {
		/* draw vertical list */
		for (item = curr; item != next; item = item->right)
			drawitem(item, 0, y += bh, mw);
	} else if (matches) {
		/* draw horizontal list */
		x += inputw;
		if (curr->left) {
			w = TEXTW(symbol_left);
			drw_setscheme(drw, scheme[SchemeNorm]);
			drw_text(drw, x, 0, w, bh, lrpad / 2, symbol_left, 0);
			x += w;
		}
		for (item = curr; item != next; item = item->right)
			x = drawitem(item, x, 0, MIN(TEXTW(item->text), mw - x - (next ? TEXTW(symbol_right) : 0)));
		if (next) {
			w = TEXTW(symbol_right);
			drw_setscheme(drw, scheme[SchemeNorm]);
			drw_text(drw, mw - w, 0, w, bh, lrpad / 2, symbol_right, 0);
		}
	}
	drw_map(drw, win, 0, 0, mw, mh, border_width);
}

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;
	/* 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");
}

int
compare_distance(const void *a, const void *b)
{
	struct item *da = *(struct item **) a;
	struct item *db = *(struct item **) b;

	if (!db)
		return 1;
	if (!da)
		return -1;

	return da->distance == db->distance ? 0 : da->distance < db->distance ? -1 : 1;
}

void
fuzzymatch(void)
{
	/* bang - we have so much memory */
	struct item *it;
	struct item **fuzzymatches = NULL;
	char c;
	int number_of_matches = 0, i, pidx, sidx, eidx;
	int text_len = strlen(text), itext_len;

	matches = matchend = NULL;

	/* walk through all items */
	for (it = items; it && it->text; it++) {
		if (text_len) {
			itext_len = strlen(it->text);
			pidx = 0; /* pointer */
			sidx = eidx = -1; /* start of match, end of match */
			/* walk through item text */
			for (i = 0; i < itext_len && (c = it->text[i]); i++) {
				/* fuzzy match pattern */
				if (!fstrncmp(&text[pidx], &c, 1)) {
					if(sidx == -1)
						sidx = i;
					pidx++;
					if (pidx == text_len) {
						eidx = i;
						break;
					}
				}
			}
			/* build list of matches */
			if (eidx != -1) {
				/* compute distance */
				/* add penalty if match starts late (log(sidx+2))
				 * add penalty for long a match without many matching characters */
				it->distance = log(sidx + 2) + (double)(eidx - sidx - text_len);
				/* fprintf(stderr, "distance %s %f\n", it->text, it->distance); */
				appenditem(it, &matches, &matchend);
				number_of_matches++;
			}
		} else {
			appenditem(it, &matches, &matchend);
		}
	}

	if (number_of_matches) {
		/* initialize array with matches */
		if (!(fuzzymatches = realloc(fuzzymatches, number_of_matches * sizeof(struct item*))))
			die("cannot realloc %u bytes:", number_of_matches * sizeof(struct item*));
		for (i = 0, it = matches; it && i < number_of_matches; i++, it = it->right) {
			fuzzymatches[i] = it;
		}
		/* sort matches according to distance */
		qsort(fuzzymatches, number_of_matches, sizeof(struct item*), compare_distance);
		/* rebuild list of matches */
		matches = matchend = NULL;
		for (i = 0, it = fuzzymatches[i];  i < number_of_matches && it && \
				it->text; i++, it = fuzzymatches[i]) {
			appenditem(it, &matches, &matchend);
		}
		free(fuzzymatches);
	}
	curr = sel = matches;
	calcoffsets();
}

static void
match(void)
{
	if (fuzzy) {
		fuzzymatch();
		return;
	}
	static char **tokv = NULL;
	static int tokn = 0;

	char buf[sizeof text], *s;
	int i, tokc = 0;
	size_t len, textsize;
	struct item *item, *lprefix, *prefixend;

	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 = matchend = prefixend = NULL;
	textsize = strlen(text);
	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);
	}
	if (lprefix) {
		if (matches) {
			matchend->right = lprefix;
			lprefix->left = matchend;
		} else
			matches = lprefix;
		matchend = prefixend;
	}
	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
page_down(int draw)
{
	if (!next)
		return;
	sel = curr = next;
	if(draw) {
		calcoffsets();
		drawmenu();
	}
}


static void
page_up(int draw)
{
	if (!prev)
		return;
	sel = curr = prev;
	if(draw) {
		calcoffsets();
		drawmenu();
	}
}

static void
x_convert_selection(int shift)
{
	XConvertSelection(dpy, shift ? XA_PRIMARY : clip,
	                  utf8, utf8, win, CurrentTime);
}

static void
writestdout(unsigned int state)
{
	if (restrict_return) {
		if (!sel || state & (ShiftMask | ControlMask))
			return;
		if(print_index)
			printf("%d\n", sel->index);
		else
			puts(sel->text_output);
		cleanup();
		exit(0);
	}
	if (!(state & ControlMask)) {
		for (int i = 0;i < selected_items_size;i++)
			if (selected_items[i] != -1 && (!sel || sel->index != selected_items[i])) {
				if(print_index)
					printf("%d\n", items[selected_items[i]].index);
				else
					puts(items[selected_items[i]].text_output);
			}
		if (sel && !(state & ShiftMask))
			if(print_index)
				printf("%d\n", sel->index);
			else
				puts(sel->text_output);
		else
			puts(print_index ? "-1" : text);
		cleanup();
		exit(0);
	}
}

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

	len = XmbLookupString(xic, ev, buf, sizeof buf, &ksym, &status);
	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_v: /* paste selection */
		case XK_V:
		case XK_y:
		case XK_Y:
			x_convert_selection(ev->state & ShiftMask);
			return;
		case XK_Left:
		case XK_KP_Left:
			movewordedge(-1);
			drawmenu();
			return;
		case XK_Right:
		case XK_KP_Right:
			movewordedge(+1);
			drawmenu();
			return;
		case XK_Return:
		case XK_KP_Enter:
			if(!restrict_return)
				toggle_selected(sel);
			break;
		case XK_bracketleft:
			cleanup();
			exit(1);
		default:
			return;
		}
	} else if (ev->state & Mod1Mask) {
		switch(ksym) {
		case XK_b:
			movewordedge(-1);
			drawmenu();
			return;
		case XK_f:
			movewordedge(+1);
			drawmenu();
			return;
		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:
	case XK_KP_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:
	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();
			curr = prev;
			calcoffsets();
			while (next && (curr = curr->right))
				calcoffsets();
		}
		sel = matchend;
		break;
	case XK_Escape:
		cleanup();
		exit(1);
	case XK_Home:
	case XK_KP_Home:
		if (sel == matches) {
			cursor = 0;
			break;
		}
		sel = curr = matches;
		calcoffsets();
		break;
	case XK_Left:
	case XK_KP_Left:
		if (cursor > 0 && (!sel || !sel->left || lines > 0)) {
			cursor = nextrune(-1);
			break;
		}
		if (lines > 0)
			return;
		/* fallthrough */
	case XK_Up:
	case XK_KP_Up:
		if (sel && sel->left && (sel = sel->left)->right == curr) {
			curr = prev;
			calcoffsets();
		}
		break;
	case XK_Next:
	case XK_KP_Next:
		page_down(1);
		return;
	case XK_Prior:
	case XK_KP_Prior:
		page_up(1);
		return;
	case XK_Return:
	case XK_KP_Enter:
		writestdout(ev->state);
		break;
	case XK_Right:
	case XK_KP_Right:
		if (text[cursor] != '\0') {
			cursor = nextrune(+1);
			break;
		}
		if (lines > 0)
			return;
		/* fallthrough */
	case XK_Down:
	case XK_KP_Down:
		if (sel && sel->right && (sel = sel->right) == next) {
			curr = next;
			calcoffsets();
		}
		break;
	case XK_Tab:
		if (!matches) break; /* cannot complete no matches */
		strncpy(text, matches->text, sizeof text - 1);
		text[sizeof text - 1] = '\0';
		int initial_cursor = cursor;
		len = cursor = strlen(text); /* length of longest common prefix */
		for (item = matches; item && item->text; item = item->right) {
			if(!!fstrncmp(text, item->text, initial_cursor))
				continue;
			cursor = 0;
			while (cursor < len && !fstrncmp(text+cursor, item->text+cursor, 1))
				cursor++;
			len = cursor;
		}
		memset(text + len, '\0', strlen(text) - len);
		match();
		break;
	}

	drawmenu();
}

static void
get_input_rect(Rect* rect)
{
	rect->x = promptw;
	rect->y = 0;
	rect->w = (lines > 0 || !matches) ? mw - rect->x : inputw;
	rect->h = bh;
}

static void
get_symbol_left_rect(Rect* rect)
{
	if (lines > 0 || !matches || !curr->left) {
		rect->x = 0;
		rect->y = 0;
		rect->w = 0;
		rect->h = 0;
		return;
	}

	rect->x = promptw + inputw;
	rect->y = 0;
	rect->w = TEXTW(symbol_left);
	rect->h = bh;
}

static void
get_symbol_right_rect(Rect* rect)
{
	if (lines > 0 || !matches || !next) {
		rect->x = 0;
		rect->y = 0;
		rect->w = 0;
		rect->h = 0;
		return;
	}

	rect->x = mw - TEXTW(symbol_right);
	rect->y = 0;
	rect->w = TEXTW(symbol_right);
	rect->h = bh;
}

static void
get_items_rect(Rect* rect)
{
	if (lines > 0) {
		rect->x = 0;
		rect->y = bh;
		rect->w = mw;
		rect->h = mh - bh;
	} else if (matches) {
		rect->x = promptw + inputw + (curr->left ? TEXTW(symbol_left) : 0);
		rect->y = 0;
		rect->w = mw - rect->x - (next ? TEXTW(symbol_right) : 0);
		rect->h = bh;
	} else {
		rect->x = 0;
		rect->y = 0;
		rect->w = 0;
		rect->h = 0;
	}
}


static int
is_in(UIPart ui_part, int x, int y)
{
	Rect rect = {0};

	switch (ui_part)
	{
		case UIInput:
			get_input_rect(&rect);
			break;
		case UIItems:
			get_items_rect(&rect);
			break;
		case UISymbolLeft:
			get_symbol_left_rect(&rect);
			break;
		case UISymbolRight:
			get_symbol_right_rect(&rect);
			break;
		default:
			return 0;
	}

	return x >= rect.x && x < rect.x + rect.w && y >= rect.y && y < rect.y + rect.h;
}

static UIPart
get_ui_part_at(int x, int y)
{
	for(int i = 0; i < UILast; i++) {
		if(is_in(i, x, y))
			return i;
	}

	return UILast;
}

static void
get_item_at(struct item **item, int x_at, int y_at) {
	int x = 0, y = 0, h = bh, w;

	if (lines > 0) {
		w = mw - x;
		for (*item = curr; *item != next; *item = (*item)->right) {
			y += h;
			if (y_at >= y && y_at <= (y + h))
				return;
		}
	} else if (matches) {
		x += inputw + promptw;
		w = curr->left ? TEXTW(symbol_left) : 0;
		for (*item = curr; *item != next; *item = (*item)->right) {
			x += w;
			w = MIN(TEXTW((*item)->text), mw - x - (next ? TEXTW(symbol_right) : 0));
			if (x_at >= x && x_at <= x + w)
				return;
		}
	}
	
	*item = NULL;
}

static void
buttonpress(XEvent *e)
{
	UIPart ui_part;
	struct item *item;
	XButtonPressedEvent *ev = &e->xbutton;

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

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

	/* middle-mouse click: paste selection */
	if (ev->button == Button2) {
		x_convert_selection(ev->state & ShiftMask);
		return;
	}

	/* scroll up */
	if (ev->button == Button4) {
		page_up(0);
		calcoffsets();
		get_item_at(&item, ev->x, ev->y);
		if (item != NULL && sel !=  item) {
			sel = item;
			drawmenu();
		}
		return;
	}
	
	/* scroll down */
	if (ev->button == Button5) {
		page_down(0);
		calcoffsets();
		get_item_at(&item, ev->x, ev->y);
		if (item != NULL && sel !=  item) {
			sel = item;
			drawmenu();
		}
		return;
	}

	/* left-click */
	if (ev->button != Button1)
		return;

	ui_part = get_ui_part_at(ev->x, ev->y);

	/* left-click on symbols: do nothing */
	if (ui_part == UISymbolLeft || ui_part == UISymbolRight) {
		return;
	}

	if (ui_part == UIInput) {
		/* shift-left-click on input: print input on stdout */
		if(ev->state & ShiftMask) {
			writestdout(ev->state);
			return;
		}
		/* left-click on input: clear input */
		insert(NULL, -cursor);
		drawmenu();
		return;
	}

	if(ui_part == UIItems) {
		if (ev->state & ShiftMask)
			return;
		/* ctrl-left-click on items: select item */
		if(!restrict_return)
			toggle_selected(sel);
		/* left-click on items: print selected items on stdout */
		get_item_at(&item, ev->x, ev->y);
		if(item != NULL) {
			writestdout(ev->state);
			drawmenu();
			return;
		}
	}
}

static void
mousemove(XEvent *e)
{
	UIPart ui_part;
	struct item* item;
	XPointerMovedEvent *ev = &e->xmotion;

	ui_part = get_ui_part_at(ev->x, ev->y);

	if (ui_part == UIInput) {
		drw_cur_set(drw, win, mouse_cursor[CurText]);
		return;
	}

	if(ui_part == UIItems) {
		drw_cur_set(drw, win, mouse_cursor[CurPointer]);
		get_item_at(&item, ev->x, ev->y);
		if (item != NULL) {
			if(sel != item) {
				sel = item;
				drawmenu();
			}
			return;
		}
	}

	drw_cur_set(drw, win, mouse_cursor[CurNormal]);
}

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;
	if(passwd){
    inputw = lines = 0;
    return;
  }

	/* 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);
		if (separator && (p = separator_greedy ?
		    strrchr(items[i].text, separator) : strchr(items[i].text, separator))) {
			*p = '\0';
			items[i].text_output = ++p;
		} else {
			items[i].text_output = items[i].text;
		}
		if (separator_reverse) {
			p = items[i].text;
			items[i].text = items[i].text_output;
			items[i].text_output = p;
		}
		items[i].index = i;
		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 ? TEXTW(items[imax].text) : 0;
	lines = MIN(lines, i);
}

static void
run(void)
{
	XEvent ev;

	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 MotionNotify:
			mousemove(&ev);
			break;
		case Expose:
			if (ev.xexpose.count == 0)
				drw_map(drw, win, 0, 0, mw, mh, border_width);
			break;
		case FocusIn:
			/* regrab focus from parent window */
			if (ev.xfocus.window != win)
				grabfocus();
			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, 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 cursors */
	mouse_cursor[CurNormal] = drw_cur_create(drw, XC_left_ptr);
	mouse_cursor[CurPointer] = drw_cur_create(drw, XC_hand2);
	mouse_cursor[CurText] = drw_cur_create(drw, XC_xterm);

	/* init appearance */
	for (j = 0; j < SchemeLast; j++)
		scheme[j] = drw_scm_create(drw, colors[j], 2);

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

	/* calculate menu geometry */
	bh = drw->fonts->h + 2;
	bh = MAX(bh,lineheight);	/* make a menu line AT LEAST 'lineheight' tall */
	lines = MAX(lines, 0);
	mh = (lines + 1) * bh;
	promptw = (prompt && *prompt) ? TEXTW(prompt) : 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 (position == CENTER) {
			mw = MIN(MAX(max_textw() + promptw, min_width), info[i].width) - border_width * 2;
			x = info[i].x_org + ((info[i].width - mw) / 2) - border_width;
			y = info[i].y_org + (centered_height >= 0 ? centered_height : ((info[i].height - mh) / 2));
		} else {
			x = info[i].x_org;
			y = info[i].y_org + (position == TOP ? 0 : info[i].height - mh - border_width * 2);
			mw = info[i].width - border_width * 2;
		}

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

		if (position == CENTER) {
			mw = MIN(MAX(max_textw() + promptw, min_width), wa.width) - border_width * 2;
			x = ((wa.width - mw) / 2) - border_width;
			y = centered_height >= 0 ? centered_height : (wa.height - mh) / 2;
		} else {
			x = 0;
			y = position == TOP ? 0 : wa.height - mh - border_width * 2;
			mw = wa.width - border_width * 20;
		}
	}
	inputw = MIN(inputw, mw/3);
	match();

	/* create menu window */
	swa.override_redirect = True;
	swa.background_pixel = scheme[SchemeNorm][ColBg].pixel;
	swa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask |
	                 ButtonPressMask | PointerMotionMask;
	win = XCreateWindow(dpy, parentwin, x, y, mw + border_width * 2, mh + border_width * 2, 0,
	                    CopyFromParent, CopyFromParent, CopyFromParent,
	                    CWOverrideRedirect | CWBackPixel | CWEventMask, &swa);
	XSetClassHint(dpy, win, &ch);


	/* 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();
	}
	
	XRectangle rectangles[4] = {
		{0, 0, mw + border_width * 2, border_width},
		{0, 0, border_width, mh + border_width * 2},
		{0, mh + border_width, mw + border_width * 2, border_width},
		{mw + border_width, 0, border_width, mh + border_width * 2}};

	XSetForeground(drw->dpy, drw->gc, scheme[SchemeBorder][ColBg].pixel);
	XDrawRectangles(drw->dpy, win, drw->gc, rectangles, 4);
	XFillRectangles(drw->dpy, win, drw->gc, rectangles, 4);

	drw_resize(drw, mw, mh);
	drawmenu();
}

static void
usage(void)
{
	fputs("\nusage: dmenu [-bcfirstvFP] [-ix] [-l lines] [-h height]\n"
	      "             [-p prompt] [-it text]\n"
	      "             [-d separator] [-D separator]\n"
	      "             [-fn font] [-m monitor] [-w windowid]\n"
	      "             [-nhb color] [-nhf color] [-shb color] [-shf color]\n"
	      "             [-nb color] [-nf color] [-sb color] [-sf color]\n", stderr);
	exit(1);
}

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], "-t"))   /* centers dmenu on screen */
			position = TOP;
		else if (!strcmp(argv[i], "-b")) /* appears at the bottom of the screen */
			position = BOTTOM;
		else if (!strcmp(argv[i], "-c"))   /* centers dmenu on screen */
			position = CENTER;
		else if (!strcmp(argv[i], "-f"))   /* grabs keyboard before reading stdin */
			fast = 1;
		else if (!strcmp(argv[i], "-i")) { /* case-insensitive item matching */
			// kept for compatibility
		} else if (!strcmp(argv[i], "-s")) { /* case-sensitive item matching */
			fstrncmp = strncmp;
			fstrstr = strstr;
		} else if (!strcmp(argv[i], "-r"))
			restrict_return = 1;
		else if (!strcmp(argv[i], "-F"))   /* disable fuzzy matching */
			fuzzy = 0;
		else if (!strcmp(argv[i], "-P"))   /* is the input a password */
			passwd = 1;
		else if (!strcmp(argv[i], "-ix"))  /* adds ability to return index in list */
			print_index = 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")) { /* minimum height of one menu line */
			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], "-it")) {   /* embedding window id */
			const char * text = argv[++i];
			insert(text, strlen(text));
		}
		else if (!strcmp(argv[i], "-d") || /* field separator */
		         (separator_greedy = !strcmp(argv[i], "-D"))) {
			separator = argv[++i][0];
			separator_reverse = argv[i][1] == '|';
		}
		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], "-nhb")) /* normal hi background color */
			colors[SchemeNormHighlight][ColBg] = argv[++i];
		else if (!strcmp(argv[i], "-nhf")) /* normal hi foreground color */
			colors[SchemeNormHighlight][ColFg] = argv[++i];
		else if (!strcmp(argv[i], "-shb")) /* selected hi background color */
			colors[SchemeSelHighlight][ColBg] = argv[++i];
		else if (!strcmp(argv[i], "-shf")) /* selected hi foreground color */
			colors[SchemeSelHighlight][ColFg] = argv[++i];
		else if (!strcmp(argv[i], "-w"))   /* embedding window id */
			embed = argv[++i];
		else if (!strcmp(argv[i], "-bw"))
			border_width = atoi(argv[++i]); /* border width */
		else
			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);
	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 - border_width * 2, wa.height - border_width * 2);
	if (!drw_fontset_create(drw, fonts, LENGTH(fonts)))
		die("no fonts could be loaded.");
	lrpad = drw->fonts->h * font_lrpad_multiplier;

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

	if (fast && !isatty(0)) {
		grabkeyboard();
		readstdin();
	} else {
		readstdin();
		grabkeyboard();
	}
	setup();
	run();

	return 1; /* unreachable */
}