garbeam@1: /*
garbeam@1:  * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
garbeam@1:  * (C)opyright MMVI Sander van Dijk <a dot h dot vandijk at gmail dot com>
garbeam@1:  * See LICENSE file for license details.
garbeam@1:  */
garbeam@1: 
garbeam@3: #include "config.h"
garbeam@3: #include "draw.h"
garbeam@3: #include "util.h"
garbeam@3: 
garbeam@1: #include <ctype.h>
garbeam@1: #include <stdlib.h>
garbeam@1: #include <stdio.h>
garbeam@1: #include <string.h>
garbeam@1: #include <sys/stat.h>
garbeam@1: #include <sys/wait.h>
garbeam@1: #include <time.h>
garbeam@1: #include <unistd.h>
garbeam@1: #include <X11/cursorfont.h>
garbeam@1: #include <X11/Xutil.h>
garbeam@1: #include <X11/keysym.h>
garbeam@1: 
garbeam@1: typedef struct Item Item;
garbeam@1: 
garbeam@1: struct Item {
garbeam@1: 	Item *next;		/* traverses all items */
garbeam@1: 	Item *left, *right;	/* traverses items matching current search pattern */
garbeam@1: 	char *text;
garbeam@1: };
garbeam@1: 
garbeam@3: static Display *dpy;
garbeam@3: static Window root;
garbeam@3: static Window win;
garbeam@3: static XRectangle rect;
garbeam@1: static Bool done = False;
garbeam@3: 
garbeam@7: static Item *allitem = NULL;	/* first of all items */
garbeam@7: static Item *item = NULL;	/* first of pattern matching items */
garbeam@7: static Item *sel = NULL;
garbeam@7: static Item *nextoff = NULL;
garbeam@7: static Item *prevoff = NULL;
garbeam@7: static Item *curroff = NULL;
garbeam@3: 
garbeam@3: static int screen;
garbeam@7: static char *title = NULL;
garbeam@3: static char text[4096];
garbeam@1: static int ret = 0;
garbeam@1: static int nitem = 0;
garbeam@1: static unsigned int cmdw = 0;
garbeam@1: static unsigned int twidth = 0;
garbeam@1: static unsigned int cwidth = 0;
garbeam@1: static const int seek = 30;		/* 30px */
garbeam@1: 
garbeam@3: static Brush brush = {0};
garbeam@3: 
garbeam@5: static void draw_menu();
garbeam@3: static void kpress(XKeyEvent * e);
garbeam@1: 
garbeam@3: static char version[] = "gridmenu - " VERSION ", (C)opyright MMVI Anselm R. Garbe\n";
garbeam@1: 
garbeam@1: static void
garbeam@1: usage()
garbeam@1: {
garbeam@3: 	fprintf(stderr, "%s", "usage: gridmenu [-v] [-t <title>]\n");
garbeam@1: 	exit(1);
garbeam@1: }
garbeam@1: 
garbeam@1: static void
garbeam@1: update_offsets()
garbeam@1: {
garbeam@1: 	unsigned int tw, w = cmdw + 2 * seek;
garbeam@1: 
garbeam@1: 	if(!curroff)
garbeam@1: 		return;
garbeam@1: 
garbeam@1: 	for(nextoff = curroff; nextoff; nextoff=nextoff->right) {
garbeam@3: 		tw = textwidth(&brush.font, nextoff->text);
garbeam@3: 		if(tw > rect.width / 3)
garbeam@3: 			tw = rect.width / 3;
garbeam@3: 		w += tw + brush.font.height;
garbeam@3: 		if(w > rect.width)
garbeam@1: 			break;
garbeam@1: 	}
garbeam@1: 
garbeam@1: 	w = cmdw + 2 * seek;
garbeam@1: 	for(prevoff = curroff; prevoff && prevoff->left; prevoff=prevoff->left) {
garbeam@3: 		tw = textwidth(&brush.font, prevoff->left->text);
garbeam@3: 		if(tw > rect.width / 3)
garbeam@3: 			tw = rect.width / 3;
garbeam@3: 		w += tw + brush.font.height;
garbeam@3: 		if(w > rect.width)
garbeam@1: 			break;
garbeam@1: 	}
garbeam@1: }
garbeam@1: 
garbeam@1: static void
garbeam@1: update_items(char *pattern)
garbeam@1: {
garbeam@1: 	unsigned int plen = strlen(pattern);
garbeam@1: 	Item *i, *j;
garbeam@1: 
garbeam@1: 	if(!pattern)
garbeam@1: 		return;
garbeam@1: 
garbeam@1: 	if(!title || *pattern)
garbeam@1: 		cmdw = cwidth;
garbeam@1: 	else
garbeam@1: 		cmdw = twidth;
garbeam@1: 
garbeam@7: 	item = j = NULL;
garbeam@1: 	nitem = 0;
garbeam@1: 
garbeam@1: 	for(i = allitem; i; i=i->next)
garbeam@1: 		if(!plen || !strncmp(pattern, i->text, plen)) {
garbeam@1: 			if(!j)
garbeam@1: 				item = i;
garbeam@1: 			else
garbeam@1: 				j->right = i;
garbeam@1: 			i->left = j;
garbeam@7: 			i->right = NULL;
garbeam@1: 			j = i;
garbeam@1: 			nitem++;
garbeam@1: 		}
garbeam@1: 	for(i = allitem; i; i=i->next)
garbeam@1: 		if(plen && strncmp(pattern, i->text, plen)
garbeam@1: 				&& strstr(i->text, pattern)) {
garbeam@1: 			if(!j)
garbeam@1: 				item = i;
garbeam@1: 			else
garbeam@1: 				j->right = i;
garbeam@1: 			i->left = j;
garbeam@7: 			i->right = NULL;
garbeam@1: 			j = i;
garbeam@1: 			nitem++;
garbeam@1: 		}
garbeam@1: 
garbeam@1: 	curroff = prevoff = nextoff = sel = item;
garbeam@1: 
garbeam@1: 	update_offsets();
garbeam@1: }
garbeam@1: 
garbeam@1: /* creates brush structs for brush mode drawing */
garbeam@1: static void
garbeam@1: draw_menu()
garbeam@1: {
garbeam@1: 	unsigned int offx = 0;
garbeam@1: 	Item *i;
garbeam@1: 
garbeam@3: 	brush.rect = rect;
garbeam@1: 	brush.rect.x = 0;
garbeam@1: 	brush.rect.y = 0;
garbeam@3: 	draw(dpy, &brush, False, 0);
garbeam@1: 
garbeam@1: 	/* print command */
garbeam@1: 	if(!title || text[0]) {
garbeam@1: 		cmdw = cwidth;
garbeam@1: 		if(cmdw && item)
garbeam@1: 			brush.rect.width = cmdw;
garbeam@3: 		draw(dpy, &brush, False, text);
garbeam@1: 	}
garbeam@1: 	else {
garbeam@1: 		cmdw = twidth;
garbeam@1: 		brush.rect.width = cmdw;
garbeam@3: 		draw(dpy, &brush, False, title);
garbeam@1: 	}
garbeam@1: 	offx += brush.rect.width;
garbeam@1: 
garbeam@1: 	if(curroff) {
garbeam@1: 		brush.rect.x = offx;
garbeam@1: 		brush.rect.width = seek;
garbeam@1: 		offx += brush.rect.width;
garbeam@3: 		draw(dpy, &brush, False, (curroff && curroff->left) ? "<" : 0);
garbeam@1: 
garbeam@1: 		/* determine maximum items */
garbeam@1: 		for(i = curroff; i != nextoff; i=i->right) {
garbeam@1: 			brush.border = False;
garbeam@1: 			brush.rect.x = offx;
garbeam@3: 			brush.rect.width = textwidth(&brush.font, i->text);
garbeam@3: 			if(brush.rect.width > rect.width / 3)
garbeam@3: 				brush.rect.width = rect.width / 3;
garbeam@3: 			brush.rect.width += brush.font.height;
garbeam@1: 			if(sel == i) {
garbeam@3: 				swap((void **)&brush.fg, (void **)&brush.bg);
garbeam@3: 				draw(dpy, &brush, True, i->text);
garbeam@3: 				swap((void **)&brush.fg, (void **)&brush.bg);
garbeam@1: 			}
garbeam@3: 			else
garbeam@3: 				draw(dpy, &brush, False, i->text);
garbeam@1: 			offx += brush.rect.width;
garbeam@1: 		}
garbeam@1: 
garbeam@3: 		brush.rect.x = rect.width - seek;
garbeam@1: 		brush.rect.width = seek;
garbeam@3: 		draw(dpy, &brush, False, nextoff ? ">" : 0);
garbeam@1: 	}
garbeam@3: 	XCopyArea(dpy, brush.drawable, win, brush.gc, 0, 0, rect.width,
garbeam@3: 			rect.height, 0, 0);
garbeam@3: 	XFlush(dpy);
garbeam@1: }
garbeam@1: 
garbeam@1: static void
garbeam@3: kpress(XKeyEvent * e)
garbeam@1: {
garbeam@1: 	KeySym ksym;
garbeam@1: 	char buf[32];
garbeam@1: 	int num, prev_nitem;
garbeam@1: 	unsigned int i, len = strlen(text);
garbeam@1: 
garbeam@1: 	buf[0] = 0;
garbeam@1: 	num = XLookupString(e, buf, sizeof(buf), &ksym, 0);
garbeam@1: 
garbeam@1: 	if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
garbeam@1: 			|| IsMiscFunctionKey(ksym) || IsPFKey(ksym)
garbeam@1: 			|| IsPrivateKeypadKey(ksym))
garbeam@1: 		return;
garbeam@1: 
garbeam@1: 	/* first check if a control mask is omitted */
garbeam@1: 	if(e->state & ControlMask) {
garbeam@1: 		switch (ksym) {
garbeam@1: 		case XK_H:
garbeam@1: 		case XK_h:
garbeam@1: 			ksym = XK_BackSpace;
garbeam@1: 			break;
garbeam@1: 		case XK_I:
garbeam@1: 		case XK_i:
garbeam@1: 			ksym = XK_Tab;
garbeam@1: 			break;
garbeam@1: 		case XK_J:
garbeam@1: 		case XK_j:
garbeam@1: 			ksym = XK_Return;
garbeam@1: 			break;
garbeam@1: 		case XK_N:
garbeam@1: 		case XK_n:
garbeam@1: 			ksym = XK_Right;
garbeam@1: 			break;
garbeam@1: 		case XK_P:
garbeam@1: 		case XK_p:
garbeam@1: 			ksym = XK_Left;
garbeam@1: 			break;
garbeam@1: 		case XK_U:
garbeam@1: 		case XK_u:
garbeam@1: 			text[0] = 0;
garbeam@1: 			update_items(text);
garbeam@1: 			draw_menu();
garbeam@1: 			return;
garbeam@1: 			break;
garbeam@1: 		case XK_bracketleft:
garbeam@1: 			ksym = XK_Escape;
garbeam@1: 			break;
garbeam@1: 		default:	/* ignore other control sequences */
garbeam@1: 			return;
garbeam@1: 			break;
garbeam@1: 		}
garbeam@1: 	}
garbeam@1: 	switch (ksym) {
garbeam@1: 	case XK_Left:
garbeam@1: 		if(!(sel && sel->left))
garbeam@1: 			return;
garbeam@1: 		sel=sel->left;
garbeam@1: 		if(sel->right == curroff) {
garbeam@1: 			curroff = prevoff;
garbeam@1: 			update_offsets();
garbeam@1: 		}
garbeam@1: 		break;
garbeam@1: 	case XK_Tab:
garbeam@1: 		if(!sel)
garbeam@1: 			return;
garbeam@3: 		strncpy(text, sel->text, sizeof(text));
garbeam@1: 		update_items(text);
garbeam@1: 		break;
garbeam@1: 	case XK_Right:
garbeam@1: 		if(!(sel && sel->right))
garbeam@1: 			return;
garbeam@1: 		sel=sel->right;
garbeam@1: 		if(sel == nextoff) {
garbeam@1: 			curroff = nextoff;
garbeam@1: 			update_offsets();
garbeam@1: 		}
garbeam@1: 		break;
garbeam@1: 	case XK_Return:
garbeam@1: 		if(e->state & ShiftMask) {
garbeam@1: 			if(text)
garbeam@1: 				fprintf(stdout, "%s", text);
garbeam@1: 		}
garbeam@1: 		else if(sel)
garbeam@1: 			fprintf(stdout, "%s", sel->text);
garbeam@1: 		else if(text)
garbeam@1: 			fprintf(stdout, "%s", text);
garbeam@1: 		fflush(stdout);
garbeam@1: 		done = True;
garbeam@1: 		break;
garbeam@1: 	case XK_Escape:
garbeam@1: 		ret = 1;
garbeam@1: 		done = True;
garbeam@1: 		break;
garbeam@1: 	case XK_BackSpace:
garbeam@1: 		if((i = len)) {
garbeam@1: 			prev_nitem = nitem;
garbeam@1: 			do {
garbeam@1: 				text[--i] = 0;
garbeam@1: 				update_items(text);
garbeam@1: 			} while(i && nitem && prev_nitem == nitem);
garbeam@1: 			update_items(text);
garbeam@1: 		}
garbeam@1: 		break;
garbeam@1: 	default:
garbeam@1: 		if((num == 1) && !iscntrl((int) buf[0])) {
garbeam@1: 			buf[num] = 0;
garbeam@1: 			if(len > 0)
garbeam@3: 				strncat(text, buf, sizeof(text));
garbeam@1: 			else
garbeam@3: 				strncpy(text, buf, sizeof(text));
garbeam@1: 			update_items(text);
garbeam@1: 		}
garbeam@1: 	}
garbeam@1: 	draw_menu();
garbeam@1: }
garbeam@1: 
garbeam@1: static char *
garbeam@1: read_allitems()
garbeam@1: {
garbeam@7: 	static char *maxname = NULL;
garbeam@1: 	char *p, buf[1024];
garbeam@1: 	unsigned int len = 0, max = 0;
garbeam@1: 	Item *i, *new;
garbeam@1: 
garbeam@3: 	i = 0;
garbeam@1: 	while(fgets(buf, sizeof(buf), stdin)) {
garbeam@1: 		len = strlen(buf);
garbeam@1: 		if (buf[len - 1] == '\n')
garbeam@1: 			buf[len - 1] = 0;
garbeam@3: 		p = estrdup(buf);
garbeam@1: 		if(max < len) {
garbeam@1: 			maxname = p;
garbeam@1: 			max = len;
garbeam@1: 		}
garbeam@1: 
garbeam@3: 		new = emalloc(sizeof(Item));
garbeam@7: 		new->next = new->left = new->right = NULL;
garbeam@1: 		new->text = p;
garbeam@1: 		if(!i)
garbeam@1: 			allitem = new;
garbeam@1: 		else 
garbeam@1: 			i->next = new;
garbeam@1: 		i = new;
garbeam@1: 	}
garbeam@1: 
garbeam@1: 	return maxname;
garbeam@1: }
garbeam@1: 
garbeam@1: int
garbeam@1: main(int argc, char *argv[])
garbeam@1: {
garbeam@1: 	int i;
garbeam@1: 	XSetWindowAttributes wa;
garbeam@3: 	char *maxname;
garbeam@1: 	XEvent ev;
garbeam@1: 
garbeam@1: 	/* command line args */
garbeam@1: 	for(i = 1; i < argc; i++) {
garbeam@1: 		if (argv[i][0] == '-')
garbeam@1: 			switch (argv[i][1]) {
garbeam@1: 			case 'v':
garbeam@1: 				fprintf(stdout, "%s", version);
garbeam@1: 				exit(0);
garbeam@1: 				break;
garbeam@1: 			case 't':
garbeam@1: 				if(++i < argc)
garbeam@1: 					title = argv[i];
garbeam@1: 				else
garbeam@1: 					usage();
garbeam@1: 				break;
garbeam@1: 			default:
garbeam@1: 				usage();
garbeam@1: 				break;
garbeam@1: 			}
garbeam@1: 		else
garbeam@1: 			usage();
garbeam@1: 	}
garbeam@1: 
garbeam@3: 	dpy = XOpenDisplay(0);
garbeam@3: 	if(!dpy)
garbeam@3: 		error("gridmenu: cannot open dpy\n");
garbeam@3: 	screen = DefaultScreen(dpy);
garbeam@3: 	root = RootWindow(dpy, screen);
garbeam@1: 
garbeam@1: 	maxname = read_allitems();
garbeam@1: 
garbeam@1: 	/* grab as early as possible, but after reading all items!!! */
garbeam@3: 	while(XGrabKeyboard(dpy, root, True, GrabModeAsync,
garbeam@1: 			 GrabModeAsync, CurrentTime) != GrabSuccess)
garbeam@1: 		usleep(1000);
garbeam@1: 
garbeam@3: 	/* style */
garbeam@3: 	loadcolors(dpy, screen, &brush, BGCOLOR, FGCOLOR, BORDERCOLOR);
garbeam@3: 	loadfont(dpy, &brush.font, FONT);
garbeam@1: 
garbeam@1: 	wa.override_redirect = 1;
garbeam@1: 	wa.background_pixmap = ParentRelative;
garbeam@5: 	wa.event_mask = ExposureMask | ButtonPressMask | KeyPressMask;
garbeam@1: 
garbeam@3: 	rect.width = DisplayWidth(dpy, screen);
garbeam@5: 	rect.height = labelheight(&brush.font);
garbeam@3: 	rect.y = DisplayHeight(dpy, screen) - rect.height;
garbeam@3: 	rect.x = 0;
garbeam@1: 
garbeam@3: 	win = XCreateWindow(dpy, root, rect.x, rect.y,
garbeam@3: 			rect.width, rect.height, 0, DefaultDepth(dpy, screen),
garbeam@3: 			CopyFromParent, DefaultVisual(dpy, screen),
garbeam@1: 			CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
garbeam@3: 	XDefineCursor(dpy, win, XCreateFontCursor(dpy, XC_xterm));
garbeam@3: 	XFlush(dpy);
garbeam@1: 
garbeam@1: 	/* pixmap */
garbeam@5: 	brush.gc = XCreateGC(dpy, root, 0, 0);
garbeam@3: 	brush.drawable = XCreatePixmap(dpy, win, rect.width, rect.height,
garbeam@3: 			DefaultDepth(dpy, screen));
garbeam@3: 	XFlush(dpy);
garbeam@1: 
garbeam@1: 	if(maxname)
garbeam@3: 		cwidth = textwidth(&brush.font, maxname) + brush.font.height;
garbeam@3: 	if(cwidth > rect.width / 3)
garbeam@3: 		cwidth = rect.width / 3;
garbeam@1: 
garbeam@1: 	if(title) {
garbeam@3: 		twidth = textwidth(&brush.font, title) + brush.font.height;
garbeam@3: 		if(twidth > rect.width / 3)
garbeam@3: 			twidth = rect.width / 3;
garbeam@1: 	}
garbeam@1: 
garbeam@1: 	cmdw = title ? twidth : cwidth;
garbeam@1: 
garbeam@1: 	text[0] = 0;
garbeam@1: 	update_items(text);
garbeam@3: 	XMapRaised(dpy, win);
garbeam@1: 	draw_menu();
garbeam@3: 	XFlush(dpy);
garbeam@1: 
garbeam@1: 	/* main event loop */
garbeam@3: 	while(!XNextEvent(dpy, &ev)) {
garbeam@1: 		switch (ev.type) {
garbeam@1: 			case KeyPress:
garbeam@3: 				kpress(&ev.xkey);
garbeam@1: 				break;
garbeam@1: 			case Expose:
garbeam@1: 				if(ev.xexpose.count == 0) {
garbeam@1: 					draw_menu();
garbeam@1: 				}
garbeam@1: 				break;
garbeam@1: 			default:
garbeam@1: 				break;
garbeam@1: 		}
garbeam@1: 		if(done)
garbeam@1: 			break;
garbeam@1: 	}
garbeam@1: 
garbeam@3: 	XUngrabKeyboard(dpy, CurrentTime);
garbeam@3: 	XFreePixmap(dpy, brush.drawable);
garbeam@3: 	XFreeGC(dpy, brush.gc);
garbeam@3: 	XDestroyWindow(dpy, win);
garbeam@3: 	XCloseDisplay(dpy);
garbeam@1: 
garbeam@1: 	return ret;
garbeam@1: }