[xmenu] / xmenu.c

#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>

/* macros */
#define LEN(x) (sizeof (x) / sizeof (x[0]))

/* color enum */
enum {ColorFG, ColorBG, ColorLast};

/* draw context structure */
struct DC {
	unsigned long unpressed[ColorLast];
	unsigned long pressed[ColorLast];
	unsigned long decoration[ColorLast];

	Drawable d;
	GC gc;
	XFontStruct *font;
	int fonth;
};

/* menu geometry structure */
struct Geometry {
	int itemb;      /* item border */
	int itemw;      /* item width */
	int itemh;      /* item height */
	int border;     /* window border width */
	int separator;  /* menu separator width */
};

/* screen geometry structure */
struct ScreenGeometry {
	int cursx, cursy;       /* cursor position */
	int screenw, screenh;   /* screen width and height */
};

/* menu item structure */
struct Item {
	char *label;
	char *output;
	int y;
	int h;
	struct Item *next;
	struct Menu *submenu;
};

/* menu structure */
struct Menu {
	struct Menu *parent;
	struct Item *list;
	struct Item *selected;
	int x, y, w, h;
	unsigned level;
	Window win;
};

/* function declarations */
static unsigned long getcolor(const char *s);
static void setupdc(void);
static void setupgeom(void);
static void setupgrab(void);
static struct Item *allocitem(const char *label, const char *output);
static struct Menu *allocmenu(struct Menu *parent, struct Item *list, unsigned level);
static void getmenuitem(Window win, int y,
                        struct Menu **menu_ret, struct Item **item_ret);
static void drawmenu(void);
static void calcscreengeom(void);
static void calcmenu(struct Menu *menu);
static void setcurrmenu(struct Menu *currmenu_new);
static void parsestdin(void);
static void run(void);
static void cleanupexit(void);
static void usage(void);

/* X variables */
static Colormap colormap;
static Display *dpy;
static Window rootwin;
static int screen;
static struct DC dc;

/* menu variables */
static struct Menu *rootmenu = NULL;
static struct Menu *currmenu = NULL;

/* geometry variables */
static struct Geometry geom;
static struct ScreenGeometry screengeom;

/* flag variables */
static Bool override_redirect = True;

#include "config.h"

int
main(int argc, char *argv[])
{
	int ch;

	while ((ch = getopt(argc, argv, "w")) != -1) {
		switch (ch) {
		case 'w':
			override_redirect = False;
			break;
		default:
			usage();
			break;
		}
	}
	argc -= optind;
	argv += optind;

	/* open connection to server and set X variables */
	if ((dpy = XOpenDisplay(NULL)) == NULL)
		errx(1, "cannot open display");
	screen = DefaultScreen(dpy);
	rootwin = RootWindow(dpy, screen);
	colormap = DefaultColormap(dpy, screen);

	/* setup */
	setupdc();
	setupgeom();
	setupgrab();

	/* generate menus and recalculate them */
	parsestdin();
	if (rootmenu == NULL)
		errx(1, "no menu generated");
	calcscreengeom();
	calcmenu(rootmenu);

	/* run event loop */
	run();

	return 1;   /* UNREACHABLE */
}

/* get color from color string */
static unsigned long
getcolor(const char *s)
{
	XColor color;

	if(!XAllocNamedColor(dpy, colormap, s, &color, &color))
		errx(1, "cannot allocate color: %s", s);
	return color.pixel;
}

/* init draw context */
static void
setupdc(void)
{
	/* get color pixels */
	dc.unpressed[ColorBG] = getcolor(UNPRESSEDBG);
	dc.unpressed[ColorFG] = getcolor(UNPRESSEDFG);
	dc.pressed[ColorBG] = getcolor(PRESSEDBG);
	dc.pressed[ColorFG] = getcolor(PRESSEDFG);
	dc.decoration[ColorBG] = getcolor(DECORATIONBG);
	dc.decoration[ColorFG] = getcolor(DECORATIONFG);

	/* try to get font */
	if ((dc.font = XLoadQueryFont(dpy, FONT)) == NULL)
		errx(1, "cannot load font");
	dc.fonth = dc.font->ascent + dc.font->descent;

	/* create GC and set its font */
	dc.gc = XCreateGC(dpy, rootwin, 0, NULL);
	XSetFont(dpy, dc.gc, dc.font->fid);
}

/* init menu geometry values */
static void
setupgeom(void)
{
	geom.itemb = ITEMB;
	geom.itemh = dc.fonth + ITEMB * 2;
	geom.itemw = ITEMW;
	geom.border = BORDER;
	geom.separator = SEPARATOR;
}

/* grab pointer */
static void
setupgrab(void)
{
	XGrabPointer(dpy, rootwin, True, ButtonPressMask | ButtonReleaseMask,
	             GrabModeAsync, GrabModeAsync, None, None, CurrentTime);
}

/* allocate an item */
static struct Item *
allocitem(const char *label, const char *output)
{
	struct Item *item;

	if ((item = malloc(sizeof *item)) == NULL)
		err(1, "malloc");
	if (*label == '\0') {
		item->label = NULL;
		item->output = NULL;
	} else {
		if ((item->label = strdup(label)) == NULL)
			err(1, "strdup");
		if ((item->output = strdup(output)) == NULL)
			err(1, "strdup");
	}
	item->y = 0;
	item->h = item->label ? geom.itemh : geom.separator;
	item->next = NULL;
	item->submenu = NULL;

	return item;
}

/* allocate a menu */
static struct Menu *
allocmenu(struct Menu *parent, struct Item *list, unsigned level)
{
	XSetWindowAttributes swa;
	struct Menu *menu;

	if ((menu = malloc(sizeof *menu)) == NULL)
		err(1, "malloc");
	menu->parent = parent;
	menu->list = list;
	menu->selected = NULL;
	menu->w = geom.itemw;
	menu->h = 0;    /* calculated by calcmenu() */
	menu->x = 0;    /* calculated by calcmenu() */
	menu->y = 0;    /* calculated by calcmenu() */
	menu->level = level;

	swa.override_redirect = override_redirect;
	swa.background_pixel = dc.decoration[ColorBG];
	swa.border_pixel = dc.decoration[ColorFG];
	swa.event_mask = ExposureMask | KeyPressMask | ButtonPressMask | ButtonReleaseMask
	               | PointerMotionMask;
	menu->win = XCreateWindow(dpy, rootwin, 0, 0, geom.itemw, geom.itemh, geom.border,
	                          CopyFromParent, CopyFromParent, CopyFromParent,
	                          CWOverrideRedirect | CWBackPixel | CWBorderPixel | CWEventMask,
	                          &swa);

	return menu;
}

/* create menus and items from the stdin */
static void
parsestdin(void)
{
	char *s, buf[BUFSIZ];
	char *label, *output;
	unsigned level = 0;
	unsigned i;
	struct Item *curritem = NULL;   /* item currently being read */
 	struct Menu *prevmenu = NULL;   /* menu the previous item was added to */
	struct Item *item;              /* dummy item for for loops */
	struct Menu *menu;              /* dummy menu for for loops */
 	size_t count = 0;   /* number of items in the current menu */

	while (fgets(buf, BUFSIZ, stdin) != NULL) {
		level = 0;
		s = buf;

		while (*s == '\t') {
			level++;
			s++;
		}

		label = output = s;

		while (*s != '\0' && *s != '\t' && *s != '\n')
			s++;

		while (*s == '\t')
			*s++ = '\0';

		if (*s != '\0' && *s != '\n')
			output = s;

		while (*s != '\0' && *s != '\n')
			s++;

		if (*s == '\n')
			*s = '\0';

		curritem = allocitem(label, output);

		if (prevmenu == NULL) {                 /* there is no menu yet */
			 menu = allocmenu(NULL, curritem, level);
			 rootmenu = menu;
			 prevmenu = menu;
			 count = 1;
		} else if (level < prevmenu->level) {   /* item is continuation of a parent menu*/
			for (menu = prevmenu, i = level;
			      menu != NULL && i < prevmenu->level;
			      menu = menu->parent, i++)
				;

			if (menu == NULL)
				errx(1, "reached NULL menu");

			for (item = menu->list; item->next != NULL; item = item->next)
				;

			item->next = curritem;
			prevmenu = menu;
		} else if (level == prevmenu->level) {  /* item is a continuation of current menu */
			for (item = prevmenu->list; item->next != NULL; item = item->next)
				;
			item->next = curritem;
		} else if (level > prevmenu->level) {   /* item begins a new menu */
			menu = allocmenu(prevmenu, curritem, level);

			for (item = prevmenu->list; item->next != NULL; item = item->next)
				;

			item->submenu = menu;

			prevmenu = menu;
		}
		count++;
	}
}

/* calculate screen geometry */
static void
calcscreengeom(void)
{
	Window w1, w2;  /* unused variables */
	int a, b;       /* unused variables */
	unsigned mask;  /* unused variable */

	XQueryPointer(dpy, rootwin, &w1, &w2, &screengeom.cursx, &screengeom.cursy, &a, &b, &mask);
	screengeom.screenw = DisplayWidth(dpy, screen);
	screengeom.screenh = DisplayHeight(dpy, screen);
}

/* recursivelly calculate height and position of the menus */
static void
calcmenu(struct Menu *menu)
{
	XWindowChanges changes;
	XSizeHints sizeh;
	struct Item *item;

	/* calculate items positions and menu height */
	for (item = menu->list; item != NULL; item = item->next) {
		item->y = menu->h;
		if (item->label == NULL)   /* height for separator item */
			menu->h += geom.separator;
		else
			menu->h += geom.itemh;
	}

	/* calculate menu's x and y positions */
	if (menu->parent == NULL) { /* if root menu, calculate in respect to cursor */
		if (screengeom.screenw - screengeom.cursx >= menu->w)
			menu->x = screengeom.cursx;
		else if (screengeom.cursx > menu->w)
			menu->x = screengeom.cursx - menu->w;

		if (screengeom.screenh - screengeom.cursy >= menu->h)
			menu->y = screengeom.cursy;
		else if (screengeom.screenh > menu->h)
			menu->y = screengeom.screenh - menu->h;
	} else {                    /* else, calculate in respect to parent menu */

		/* search for the item in parent menu that generates this menu */
		for (item = menu->parent->list; item->submenu != menu; item = item->next)
			;

		if (screengeom.screenw - (menu->parent->x + menu->parent->w) >= menu->w)
			menu->x = menu->parent->x + menu->parent->w;
		else if (menu->parent->x > menu->w)
			menu->x = menu->parent->x - menu->w;

		if (screengeom.screenh - (item->y + menu->parent->y) > menu->h)
			menu->y = item->y + menu->parent->y;
		else if (screengeom.screenh - menu->parent->y > menu->h)
			menu->y = menu->parent->y;
		else if (screengeom.screenh > menu->h)
			menu->y = screengeom.screenh - menu->h;
	}

	/* update menu geometry */
	changes.height = menu->h;
	changes.x = menu->x;
	changes.y = menu->y;
	XConfigureWindow(dpy, menu->win, CWHeight | CWX | CWY, &changes);

	/* set window manager size hints */
	sizeh.flags = PMaxSize | PMinSize;
	sizeh.min_width = sizeh.max_width = menu->w;
	sizeh.min_height = sizeh.max_height = menu->h;
	XSetWMNormalHints(dpy, menu->win, &sizeh);

	/* calculate positions of submenus */
	for (item = menu->list; item != NULL; item = item->next) {
		if (item->submenu != NULL)
			calcmenu(item->submenu);
	}
}

/* get menu and item of given window and position */
static void
getmenuitem(Window win, int y,
            struct Menu **menu_ret, struct Item **item_ret)
{
	struct Menu *menu = NULL;
	struct Item *item = NULL;

	for (menu = currmenu; menu != NULL; menu = menu->parent) {
		if (menu->win == win) {
			for (item = menu->list; item != NULL; item = item->next) {
				if (y >= item->y && y <= item->y + item->h) {
					goto done;
				}
			}
		}
	}


done:
	*menu_ret = menu;
	*item_ret = item;
}

/* set currentmenu to menu, umap previous menus and map current menu and its parents */
static void
setcurrmenu(struct Menu *currmenu_new)
{
	struct Menu *menu;

	if (currmenu_new == currmenu)
		return;

	for (menu = currmenu; menu != NULL; menu = menu->parent) {
		XUnmapWindow(dpy, menu->win);
	}

	currmenu = currmenu_new;

	for (menu = currmenu; menu != NULL; menu = menu->parent)
		XMapWindow(dpy, menu->win);
}

/* draw items of the current menu and of its ancestors */
static void
drawmenu(void)
{
	struct Menu *menu;
	struct Item *item;

	for (menu = currmenu; menu != NULL; menu = menu->parent) {
		for (item = menu->list; item != NULL; item = item->next) {
			unsigned long *color;
			size_t labellen;
			int labelx, labely;

			/* determine item color */
			if (item->label == NULL)
				color = dc.decoration;
			else if (item == menu->selected)
				color = dc.pressed;
			else
				color = dc.unpressed;

			/* draw item box */
			XSetForeground(dpy, dc.gc, color[ColorBG]);
			XFillRectangle(dpy, menu->win, dc.gc, 0, item->y,
			               geom.itemw, item->h);

			/* continue if item is a separator */
			if (item->label == NULL)
				continue;

			/* draw item label */
			labellen = strlen(item->label);
			labelx = 0 + dc.fonth;
			labely = item->y + dc.fonth + geom.itemb;
			XSetForeground(dpy, dc.gc, color[ColorFG]);
			XDrawString(dpy, menu->win, dc.gc, labelx, labely, item->label, labellen);

			/* draw triangle, if item contains a submenu */
			if (item->submenu != NULL) {
				int trianglex = geom.itemw - (geom.itemb + dc.fonth);
				int triangley = item->y + geom.itemb;

				XPoint triangle[] = {
					{trianglex, triangley},
					{trianglex + dc.fonth, triangley + dc.fonth/2},
					{trianglex, triangley + dc.fonth},
					{trianglex, triangley}
				};

				XFillPolygon(dpy, menu->win, dc.gc, triangle, LEN(triangle),
				             Convex, CoordModeOrigin);
			}
		}
	}
}

/* run event loop */
static void
run(void)
{
	struct Menu *menu;
	struct Item *item;
	struct Item *previtem = NULL;
	XEvent ev;

	setcurrmenu(rootmenu);

	while (!XNextEvent(dpy, &ev)) {
		switch(ev.type) {
		case Expose:
			drawmenu();
			break;
		case MotionNotify:
			getmenuitem(ev.xbutton.window, ev.xbutton.y, &menu, &item);
			if (menu != NULL && item != NULL) {
				if (previtem != item) {
					if (item->submenu != NULL)
						setcurrmenu(item->submenu);
					else
						setcurrmenu(menu);
					previtem = item;
				} else if (menu->selected != item)
					menu->selected = item;
			}
			drawmenu();
			break;
		case ButtonRelease:
			getmenuitem(ev.xbutton.window, ev.xbutton.y, &menu, &item);
			if (menu != NULL && item != NULL) {
				if (item->label == NULL)
					break;  /* ignore separators */
				if (item->submenu != NULL) {
					setcurrmenu(item->submenu);
				} else {
					printf("%s\n", item->output);
					cleanupexit();
				}
				drawmenu();
			} else {
				cleanupexit();
			}
			break;
		}
	}
}

/* cleanup and exit */
static void
cleanupexit(void)
{
	XCloseDisplay(dpy);
	exit(0);
}

/* show usage */
static void
usage(void)
{
	(void)fprintf(stderr, "usage: xmenu [-w] menuname\n");
	exit(1);
}
Commit	Line	Data
a7732690	1	#include <err.h>
	2	#include <stdio.h>
	3	#include <stdlib.h>
	4	#include <string.h>
	5	#include <unistd.h>
	6	#include <X11/Xlib.h>
	7	#include <X11/Xutil.h>
	8
	9	/* macros */
	10	#define LEN(x) (sizeof (x) / sizeof (x[0]))
	11
	12	/* color enum */
	13	enum {ColorFG, ColorBG, ColorLast};
	14
	15	/* draw context structure */
	16	struct DC {
	17	unsigned long unpressed[ColorLast];
	18	unsigned long pressed[ColorLast];
	19	unsigned long decoration[ColorLast];
	20
	21	Drawable d;
	22	GC gc;
	23	XFontStruct *font;
	24	int fonth;
	25	};
	26
	27	/* menu geometry structure */
	28	struct Geometry {
	29	int itemb; /* item border */
	30	int itemw; /* item width */
	31	int itemh; /* item height */
a80fee22	32	int border; /* window border width */
a80fee22	33	int separator; /* menu separator width */
a7732690	34	};
	35
	36	/* screen geometry structure */
	37	struct ScreenGeometry {
	38	int cursx, cursy; /* cursor position */
	39	int screenw, screenh; /* screen width and height */
	40	};
	41
	42	/* menu item structure */
	43	struct Item {
	44	char *label;
	45	char *output;
7fbd1c5e	46	int y;
7fbd1c5e	47	int h;
a7732690	48	struct Item *next;
	49	struct Menu *submenu;
	50	};
	51
	52	/* menu structure */
	53	struct Menu {
	54	struct Menu *parent;
	55	struct Item *list;
	56	struct Item *selected;
	57	int x, y, w, h;
	58	unsigned level;
a7732690	59	Window win;
	60	};
	61
	62	/* function declarations */
	63	static unsigned long getcolor(const char *s);
	64	static void setupdc(void);
	65	static void setupgeom(void);
	66	static void setupgrab(void);
a80fee22	67	static struct Item allocitem(const char label, const char *output);
a7732690	68	static struct Menu allocmenu(struct Menu parent, struct Item *list, unsigned level);
a80fee22	69	static void getmenuitem(Window win, int y,
a7732690	70	struct Menu menu_ret, struct Item item_ret);
	71	static void drawmenu(void);
	72	static void calcscreengeom(void);
	73	static void calcmenu(struct Menu *menu);
	74	static void setcurrmenu(struct Menu *currmenu_new);
	75	static void parsestdin(void);
	76	static void run(void);
	77	static void cleanupexit(void);
	78	static void usage(void);
	79
	80	/* X variables */
	81	static Colormap colormap;
	82	static Display *dpy;
	83	static Window rootwin;
	84	static int screen;
	85	static struct DC dc;
	86
	87	/* menu variables */
	88	static struct Menu *rootmenu = NULL;
	89	static struct Menu *currmenu = NULL;
	90
	91	/* geometry variables */
	92	static struct Geometry geom;
a80fee22	93	static struct ScreenGeometry screengeom;
a7732690	94
	95	/* flag variables */
	96	static Bool override_redirect = True;
	97
	98	#include "config.h"
	99
	100	int
	101	main(int argc, char *argv[])
	102	{
	103	int ch;
	104
	105	while ((ch = getopt(argc, argv, "w")) != -1) {
	106	switch (ch) {
	107	case 'w':
	108	override_redirect = False;
	109	break;
	110	default:
	111	usage();
	112	break;
	113	}
	114	}
	115	argc -= optind;
	116	argv += optind;
	117
	118	/* open connection to server and set X variables */
	119	if ((dpy = XOpenDisplay(NULL)) == NULL)
	120	errx(1, "cannot open display");
	121	screen = DefaultScreen(dpy);
	122	rootwin = RootWindow(dpy, screen);
	123	colormap = DefaultColormap(dpy, screen);
	124
	125	/* setup */
	126	setupdc();
	127	setupgeom();
	128	setupgrab();
	129
	130	/* generate menus and recalculate them */
	131	parsestdin();
	132	if (rootmenu == NULL)
	133	errx(1, "no menu generated");
	134	calcscreengeom();
	135	calcmenu(rootmenu);
	136
	137	/* run event loop */
	138	run();
	139
	140	return 1; /* UNREACHABLE */
	141	}
	142
	143	/* get color from color string */
	144	static unsigned long
	145	getcolor(const char *s)
	146	{
	147	XColor color;
	148
	149	if(!XAllocNamedColor(dpy, colormap, s, &color, &color))
	150	errx(1, "cannot allocate color: %s", s);
	151	return color.pixel;
	152	}
	153
	154	/* init draw context */
	155	static void
	156	setupdc(void)
	157	{
158	/* get color pixels */
159	dc.unpressed[ColorBG] = getcolor(UNPRESSEDBG);
160	dc.unpressed[ColorFG] = getcolor(UNPRESSEDFG);
161	dc.pressed[ColorBG] = getcolor(PRESSEDBG);
162	dc.pressed[ColorFG] = getcolor(PRESSEDFG);
163	dc.decoration[ColorBG] = getcolor(DECORATIONBG);
164	dc.decoration[ColorFG] = getcolor(DECORATIONFG);
165
166	/* try to get font */
167	if ((dc.font = XLoadQueryFont(dpy, FONT)) == NULL)
168	errx(1, "cannot load font");
169	dc.fonth = dc.font->ascent + dc.font->descent;
170
171	/* create GC and set its font */
172	dc.gc = XCreateGC(dpy, rootwin, 0, NULL);
173	XSetFont(dpy, dc.gc, dc.font->fid);
174	}
175
176	/* init menu geometry values */
177	static void
178	setupgeom(void)
179	{
180	geom.itemb = ITEMB;
181	geom.itemh = dc.fonth + ITEMB * 2;
182	geom.itemw = ITEMW;
183	geom.border = BORDER;
a80fee22	184	geom.separator = SEPARATOR;
a7732690	185	}
	186
	187	/* grab pointer */
	188	static void
	189	setupgrab(void)
	190	{
	191	XGrabPointer(dpy, rootwin, True, ButtonPressMask \| ButtonReleaseMask,
	192	GrabModeAsync, GrabModeAsync, None, None, CurrentTime);
	193	}
	194
	195	/* allocate an item */
	196	static struct Item *
a80fee22	197	allocitem(const char label, const char output)
a7732690	198	{
	199	struct Item *item;
	200
	201	if ((item = malloc(sizeof *item)) == NULL)
	202	err(1, "malloc");
7fbd1c5e	203	if (*label == '\0') {
	204	item->label = NULL;
	205	item->output = NULL;
	206	} else {
	207	if ((item->label = strdup(label)) == NULL)
	208	err(1, "strdup");
	209	if ((item->output = strdup(output)) == NULL)
	210	err(1, "strdup");
	211	}
a80fee22	212	item->y = 0;
7fbd1c5e	213	item->h = item->label ? geom.itemh : geom.separator;
a7732690	214	item->next = NULL;
	215	item->submenu = NULL;
	216
	217	return item;
	218	}
	219
	220	/* allocate a menu */
	221	static struct Menu *
	222	allocmenu(struct Menu parent, struct Item list, unsigned level)
	223	{
	224	XSetWindowAttributes swa;
	225	struct Menu *menu;
	226
	227	if ((menu = malloc(sizeof *menu)) == NULL)
	228	err(1, "malloc");
	229	menu->parent = parent;
	230	menu->list = list;
	231	menu->selected = NULL;
a7732690	232	menu->w = geom.itemw;
a80fee22	233	menu->h = 0; /* calculated by calcmenu() */
	234	menu->x = 0; /* calculated by calcmenu() */
	235	menu->y = 0; /* calculated by calcmenu() */
a7732690	236	menu->level = level;
a7732690	237
	238	swa.override_redirect = override_redirect;
	239	swa.background_pixel = dc.decoration[ColorBG];
	240	swa.border_pixel = dc.decoration[ColorFG];
	241	swa.event_mask = ExposureMask \| KeyPressMask \| ButtonPressMask \| ButtonReleaseMask
	242	\| PointerMotionMask;
	243	menu->win = XCreateWindow(dpy, rootwin, 0, 0, geom.itemw, geom.itemh, geom.border,
	244	CopyFromParent, CopyFromParent, CopyFromParent,
	245	CWOverrideRedirect \| CWBackPixel \| CWBorderPixel \| CWEventMask,
	246	&swa);
	247
	248	return menu;
	249	}
	250
	251	/* create menus and items from the stdin */
	252	static void
	253	parsestdin(void)
	254	{
	255	char *s, buf[BUFSIZ];
	256	char label, output;
	257	unsigned level = 0;
	258	unsigned i;
a80fee22	259	struct Item curritem = NULL; / item currently being read */
	260	struct Menu prevmenu = NULL; / menu the previous item was added to */
	261	struct Item item; / dummy item for for loops */
	262	struct Menu menu; / dummy menu for for loops */
a7732690	263	size_t count = 0; /* number of items in the current menu */
	264
	265	while (fgets(buf, BUFSIZ, stdin) != NULL) {
	266	level = 0;
	267	s = buf;
	268
	269	while (*s == '\t') {
	270	level++;
	271	s++;
	272	}
	273
	274	label = output = s;
	275
	276	while (s != '\0' && s != '\t' && *s != '\n')
	277	s++;
	278
	279	while (*s == '\t')
	280	*s++ = '\0';
	281
	282	if (s != '\0' && s != '\n')
	283	output = s;
	284
	285	while (s != '\0' && s != '\n')
	286	s++;
	287
	288	if (*s == '\n')
	289	*s = '\0';
	290
a80fee22	291	curritem = allocitem(label, output);
a7732690	292
a7732690	293	if (prevmenu == NULL) { /* there is no menu yet */
a80fee22	294	menu = allocmenu(NULL, curritem, level);
a7732690	295	rootmenu = menu;
	296	prevmenu = menu;
	297	count = 1;
	298	} else if (level < prevmenu->level) { /* item is continuation of a parent menu*/
	299	for (menu = prevmenu, i = level;
	300	menu != NULL && i < prevmenu->level;
	301	menu = menu->parent, i++)
	302	;
	303
	304	if (menu == NULL)
	305	errx(1, "reached NULL menu");
	306
a80fee22	307	for (item = menu->list; item->next != NULL; item = item->next)
a7732690	308	;
a7732690	309
a80fee22	310	item->next = curritem;
a7732690	311	prevmenu = menu;
a7732690	312	} else if (level == prevmenu->level) { /* item is a continuation of current menu */
a80fee22	313	for (item = prevmenu->list; item->next != NULL; item = item->next)
a7732690	314	;
a80fee22	315	item->next = curritem;
a7732690	316	} else if (level > prevmenu->level) { /* item begins a new menu */
a80fee22	317	menu = allocmenu(prevmenu, curritem, level);
a7732690	318
a80fee22	319	for (item = prevmenu->list; item->next != NULL; item = item->next)
a7732690	320	;
a7732690	321
a80fee22	322	item->submenu = menu;
a7732690	323
	324	prevmenu = menu;
	325	}
a80fee22	326	count++;
a7732690	327	}
	328	}
	329
	330	/* calculate screen geometry */
	331	static void
	332	calcscreengeom(void)
	333	{
	334	Window w1, w2; /* unused variables */
	335	int a, b; /* unused variables */
	336	unsigned mask; /* unused variable */
	337
a80fee22	338	XQueryPointer(dpy, rootwin, &w1, &w2, &screengeom.cursx, &screengeom.cursy, &a, &b, &mask);
	339	screengeom.screenw = DisplayWidth(dpy, screen);
	340	screengeom.screenh = DisplayHeight(dpy, screen);
a7732690	341	}
	342
	343	/* recursivelly calculate height and position of the menus */
	344	static void
	345	calcmenu(struct Menu *menu)
	346	{
	347	XWindowChanges changes;
09c13122	348	XSizeHints sizeh;
a80fee22	349	struct Item *item;
a7732690	350
a80fee22	351	/* calculate items positions and menu height */
	352	for (item = menu->list; item != NULL; item = item->next) {
	353	item->y = menu->h;
7fbd1c5e	354	if (item->label == NULL) /* height for separator item */
a80fee22	355	menu->h += geom.separator;
	356	else
	357	menu->h += geom.itemh;
	358	}
a7732690	359
	360	/* calculate menu's x and y positions */
	361	if (menu->parent == NULL) { /* if root menu, calculate in respect to cursor */
a80fee22	362	if (screengeom.screenw - screengeom.cursx >= menu->w)
	363	menu->x = screengeom.cursx;
	364	else if (screengeom.cursx > menu->w)
	365	menu->x = screengeom.cursx - menu->w;
	366
	367	if (screengeom.screenh - screengeom.cursy >= menu->h)
	368	menu->y = screengeom.cursy;
	369	else if (screengeom.screenh > menu->h)
	370	menu->y = screengeom.screenh - menu->h;
a7732690	371	} else { /* else, calculate in respect to parent menu */
	372
	373	/* search for the item in parent menu that generates this menu */
a80fee22	374	for (item = menu->parent->list; item->submenu != menu; item = item->next)
a7732690	375	;
a7732690	376
a80fee22	377	if (screengeom.screenw - (menu->parent->x + menu->parent->w) >= menu->w)
a7732690	378	menu->x = menu->parent->x + menu->parent->w;
	379	else if (menu->parent->x > menu->w)
	380	menu->x = menu->parent->x - menu->w;
	381
a80fee22	382	if (screengeom.screenh - (item->y + menu->parent->y) > menu->h)
	383	menu->y = item->y + menu->parent->y;
	384	else if (screengeom.screenh - menu->parent->y > menu->h)
a7732690	385	menu->y = menu->parent->y;
a80fee22	386	else if (screengeom.screenh > menu->h)
a80fee22	387	menu->y = screengeom.screenh - menu->h;
a7732690	388	}
	389
	390	/* update menu geometry */
	391	changes.height = menu->h;
	392	changes.x = menu->x;
	393	changes.y = menu->y;
	394	XConfigureWindow(dpy, menu->win, CWHeight \| CWX \| CWY, &changes);
	395
09c13122	396	/* set window manager size hints */
	397	sizeh.flags = PMaxSize \| PMinSize;
	398	sizeh.min_width = sizeh.max_width = menu->w;
	399	sizeh.min_height = sizeh.max_height = menu->h;
	400	XSetWMNormalHints(dpy, menu->win, &sizeh);
	401
a80fee22	402	/* calculate positions of submenus */
a7732690	403	for (item = menu->list; item != NULL; item = item->next) {
	404	if (item->submenu != NULL)
	405	calcmenu(item->submenu);
	406	}
	407	}
	408
	409	/* get menu and item of given window and position */
	410	static void
a80fee22	411	getmenuitem(Window win, int y,
a7732690	412	struct Menu menu_ret, struct Item item_ret)
	413	{
	414	struct Menu *menu = NULL;
	415	struct Item *item = NULL;
	416
	417	for (menu = currmenu; menu != NULL; menu = menu->parent) {
	418	if (menu->win == win) {
	419	for (item = menu->list; item != NULL; item = item->next) {
7fbd1c5e	420	if (y >= item->y && y <= item->y + item->h) {
a7732690	421	goto done;
	422	}
	423	}
	424	}
	425	}
	426
	427
	428	done:
	429	*menu_ret = menu;
	430	*item_ret = item;
	431	}
	432
	433	/* set currentmenu to menu, umap previous menus and map current menu and its parents */
	434	static void
	435	setcurrmenu(struct Menu *currmenu_new)
	436	{
	437	struct Menu *menu;
	438
	439	if (currmenu_new == currmenu)
	440	return;
	441
	442	for (menu = currmenu; menu != NULL; menu = menu->parent) {
	443	XUnmapWindow(dpy, menu->win);
	444	}
	445
	446	currmenu = currmenu_new;
	447
	448	for (menu = currmenu; menu != NULL; menu = menu->parent)
	449	XMapWindow(dpy, menu->win);
	450	}
	451
	452	/* draw items of the current menu and of its ancestors */
	453	static void
	454	drawmenu(void)
	455	{
	456	struct Menu *menu;
	457	struct Item *item;
	458
	459	for (menu = currmenu; menu != NULL; menu = menu->parent) {
a7732690	460	for (item = menu->list; item != NULL; item = item->next) {
	461	unsigned long *color;
	462	size_t labellen;
	463	int labelx, labely;
a7732690	464
a7732690	465	/* determine item color */
7fbd1c5e	466	if (item->label == NULL)
	467	color = dc.decoration;
	468	else if (item == menu->selected)
a7732690	469	color = dc.pressed;
	470	else
	471	color = dc.unpressed;
	472
a7732690	473	/* draw item box */
a7732690	474	XSetForeground(dpy, dc.gc, color[ColorBG]);
7fbd1c5e	475	XFillRectangle(dpy, menu->win, dc.gc, 0, item->y,
	476	geom.itemw, item->h);
	477
	478	/* continue if item is a separator */
	479	if (item->label == NULL)
	480	continue;
a7732690	481
	482	/* draw item label */
	483	labellen = strlen(item->label);
	484	labelx = 0 + dc.fonth;
7fbd1c5e	485	labely = item->y + dc.fonth + geom.itemb;
a7732690	486	XSetForeground(dpy, dc.gc, color[ColorFG]);
	487	XDrawString(dpy, menu->win, dc.gc, labelx, labely, item->label, labellen);
	488
	489	/* draw triangle, if item contains a submenu */
	490	if (item->submenu != NULL) {
	491	int trianglex = geom.itemw - (geom.itemb + dc.fonth);
7fbd1c5e	492	int triangley = item->y + geom.itemb;
a7732690	493
	494	XPoint triangle[] = {
	495	{trianglex, triangley},
	496	{trianglex + dc.fonth, triangley + dc.fonth/2},
	497	{trianglex, triangley + dc.fonth},
	498	{trianglex, triangley}
	499	};
	500
	501	XFillPolygon(dpy, menu->win, dc.gc, triangle, LEN(triangle),
	502	Convex, CoordModeOrigin);
	503	}
a7732690	504	}
	505	}
	506	}
	507
	508	/* run event loop */
	509	static void
	510	run(void)
	511	{
	512	struct Menu *menu;
	513	struct Item *item;
	514	struct Item *previtem = NULL;
	515	XEvent ev;
	516
	517	setcurrmenu(rootmenu);
	518
	519	while (!XNextEvent(dpy, &ev)) {
	520	switch(ev.type) {
	521	case Expose:
	522	drawmenu();
	523	break;
	524	case MotionNotify:
a80fee22	525	getmenuitem(ev.xbutton.window, ev.xbutton.y, &menu, &item);
a7732690	526	if (menu != NULL && item != NULL) {
	527	if (previtem != item) {
	528	if (item->submenu != NULL)
	529	setcurrmenu(item->submenu);
	530	else
	531	setcurrmenu(menu);
	532	previtem = item;
	533	} else if (menu->selected != item)
	534	menu->selected = item;
	535	}
	536	drawmenu();
	537	break;
	538	case ButtonRelease:
a80fee22	539	getmenuitem(ev.xbutton.window, ev.xbutton.y, &menu, &item);
a7732690	540	if (menu != NULL && item != NULL) {
7fbd1c5e	541	if (item->label == NULL)
7fbd1c5e	542	break; /* ignore separators */
a7732690	543	if (item->submenu != NULL) {
	544	setcurrmenu(item->submenu);
	545	} else {
	546	printf("%s\n", item->output);
	547	cleanupexit();
	548	}
	549	drawmenu();
	550	} else {
	551	cleanupexit();
	552	}
	553	break;
	554	}
	555	}
	556	}
	557
	558	/* cleanup and exit */
	559	static void
	560	cleanupexit(void)
	561	{
	562	XCloseDisplay(dpy);
	563	exit(0);
	564	}
	565
	566	/* show usage */
	567	static void
	568	usage(void)
	569	{
	570	(void)fprintf(stderr, "usage: xmenu [-w] menuname\n");
	571	exit(1);
	572	}