renamed gridmenu.c into menu.c

1 files changed, 465 insertions, 0 deletions

diff --git a/menu.c b/menu.c
new file mode 100644
index 0000000..b4e08d4
--- /dev/null
+++ b/menu.c
@@ -0,0 +1,465 @@
+/*
+ * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
+ * (C)opyright MMVI Sander van Dijk <a dot h dot vandijk at gmail dot com>
+ * See LICENSE file for license details.
+ */
+
+#include "config.h"
+#include "draw.h"
+#include "util.h"
+
+#include <ctype.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+#include <time.h>
+#include <unistd.h>
+#include <X11/cursorfont.h>
+#include <X11/Xutil.h>
+#include <X11/keysym.h>
+
+typedef struct Item Item;
+
+struct Item {
+	Item *next;		/* traverses all items */
+	Item *left, *right;	/* traverses items matching current search pattern */
+	char *text;
+};
+
+static Display *dpy;
+static Window root;
+static Window win;
+static XRectangle rect;
+static Bool done = False;
+
+static Item *allitem = 0;	/* first of all items */
+static Item *item = 0;	/* first of pattern matching items */
+static Item *sel = 0;
+static Item *nextoff = 0;
+static Item *prevoff = 0;
+static Item *curroff = 0;
+
+static int screen;
+static char *title = 0;
+static char text[4096];
+static int ret = 0;
+static int nitem = 0;
+static unsigned int cmdw = 0;
+static unsigned int twidth = 0;
+static unsigned int cwidth = 0;
+static const int seek = 30;		/* 30px */
+
+static Brush brush = {0};
+
+static void draw_menu(void);
+static void kpress(XKeyEvent * e);
+
+static char version[] = "gridmenu - " VERSION ", (C)opyright MMVI Anselm R. Garbe\n";
+
+static void
+usage()
+{
+	fprintf(stderr, "%s", "usage: gridmenu [-v] [-t <title>]\n");
+	exit(1);
+}
+
+static void
+update_offsets()
+{
+	unsigned int tw, w = cmdw + 2 * seek;
+
+	if(!curroff)
+		return;
+
+	for(nextoff = curroff; nextoff; nextoff=nextoff->right) {
+		tw = textwidth(&brush.font, nextoff->text);
+		if(tw > rect.width / 3)
+			tw = rect.width / 3;
+		w += tw + brush.font.height;
+		if(w > rect.width)
+			break;
+	}
+
+	w = cmdw + 2 * seek;
+	for(prevoff = curroff; prevoff && prevoff->left; prevoff=prevoff->left) {
+		tw = textwidth(&brush.font, prevoff->left->text);
+		if(tw > rect.width / 3)
+			tw = rect.width / 3;
+		w += tw + brush.font.height;
+		if(w > rect.width)
+			break;
+	}
+}
+
+static void
+update_items(char *pattern)
+{
+	unsigned int plen = strlen(pattern);
+	Item *i, *j;
+
+	if(!pattern)
+		return;
+
+	if(!title || *pattern)
+		cmdw = cwidth;
+	else
+		cmdw = twidth;
+
+	item = j = 0;
+	nitem = 0;
+
+	for(i = allitem; i; i=i->next)
+		if(!plen || !strncmp(pattern, i->text, plen)) {
+			if(!j)
+				item = i;
+			else
+				j->right = i;
+			i->left = j;
+			i->right = 0;
+			j = i;
+			nitem++;
+		}
+	for(i = allitem; i; i=i->next)
+		if(plen && strncmp(pattern, i->text, plen)
+				&& strstr(i->text, pattern)) {
+			if(!j)
+				item = i;
+			else
+				j->right = i;
+			i->left = j;
+			i->right = 0;
+			j = i;
+			nitem++;
+		}
+
+	curroff = prevoff = nextoff = sel = item;
+
+	update_offsets();
+}
+
+/* creates brush structs for brush mode drawing */
+static void
+draw_menu()
+{
+	unsigned int offx = 0;
+	Item *i;
+
+	brush.rect = rect;
+	brush.rect.x = 0;
+	brush.rect.y = 0;
+	draw(dpy, &brush, False, 0);
+
+	/* print command */
+	if(!title || text[0]) {
+		cmdw = cwidth;
+		if(cmdw && item)
+			brush.rect.width = cmdw;
+		draw(dpy, &brush, False, text);
+	}
+	else {
+		cmdw = twidth;
+		brush.rect.width = cmdw;
+		draw(dpy, &brush, False, title);
+	}
+	offx += brush.rect.width;
+
+	if(curroff) {
+		brush.rect.x = offx;
+		brush.rect.width = seek;
+		offx += brush.rect.width;
+		draw(dpy, &brush, False, (curroff && curroff->left) ? "<" : 0);
+
+		/* determine maximum items */
+		for(i = curroff; i != nextoff; i=i->right) {
+			brush.border = False;
+			brush.rect.x = offx;
+			brush.rect.width = textwidth(&brush.font, i->text);
+			if(brush.rect.width > rect.width / 3)
+				brush.rect.width = rect.width / 3;
+			brush.rect.width += brush.font.height;
+			if(sel == i) {
+				swap((void **)&brush.fg, (void **)&brush.bg);
+				draw(dpy, &brush, True, i->text);
+				swap((void **)&brush.fg, (void **)&brush.bg);
+			}
+			else
+				draw(dpy, &brush, False, i->text);
+			offx += brush.rect.width;
+		}
+
+		brush.rect.x = rect.width - seek;
+		brush.rect.width = seek;
+		draw(dpy, &brush, False, nextoff ? ">" : 0);
+	}
+	XCopyArea(dpy, brush.drawable, win, brush.gc, 0, 0, rect.width,
+			rect.height, 0, 0);
+	XFlush(dpy);
+}
+
+static void
+kpress(XKeyEvent * e)
+{
+	KeySym ksym;
+	char buf[32];
+	int num, prev_nitem;
+	unsigned int i, len = strlen(text);
+
+	buf[0] = 0;
+	num = XLookupString(e, buf, sizeof(buf), &ksym, 0);
+
+	if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
+			|| IsMiscFunctionKey(ksym) || IsPFKey(ksym)
+			|| IsPrivateKeypadKey(ksym))
+		return;
+
+	/* first check if a control mask is omitted */
+	if(e->state & ControlMask) {
+		switch (ksym) {
+		case XK_H:
+		case XK_h:
+			ksym = XK_BackSpace;
+			break;
+		case XK_I:
+		case XK_i:
+			ksym = XK_Tab;
+			break;
+		case XK_J:
+		case XK_j:
+			ksym = XK_Return;
+			break;
+		case XK_N:
+		case XK_n:
+			ksym = XK_Right;
+			break;
+		case XK_P:
+		case XK_p:
+			ksym = XK_Left;
+			break;
+		case XK_U:
+		case XK_u:
+			text[0] = 0;
+			update_items(text);
+			draw_menu();
+			return;
+			break;
+		case XK_bracketleft:
+			ksym = XK_Escape;
+			break;
+		default:	/* ignore other control sequences */
+			return;
+			break;
+		}
+	}
+	switch (ksym) {
+	case XK_Left:
+		if(!(sel && sel->left))
+			return;
+		sel=sel->left;
+		if(sel->right == curroff) {
+			curroff = prevoff;
+			update_offsets();
+		}
+		break;
+	case XK_Tab:
+		if(!sel)
+			return;
+		strncpy(text, sel->text, sizeof(text));
+		update_items(text);
+		break;
+	case XK_Right:
+		if(!(sel && sel->right))
+			return;
+		sel=sel->right;
+		if(sel == nextoff) {
+			curroff = nextoff;
+			update_offsets();
+		}
+		break;
+	case XK_Return:
+		if(e->state & ShiftMask) {
+			if(text)
+				fprintf(stdout, "%s", text);
+		}
+		else if(sel)
+			fprintf(stdout, "%s", sel->text);
+		else if(text)
+			fprintf(stdout, "%s", text);
+		fflush(stdout);
+		done = True;
+		break;
+	case XK_Escape:
+		ret = 1;
+		done = True;
+		break;
+	case XK_BackSpace:
+		if((i = len)) {
+			prev_nitem = nitem;
+			do {
+				text[--i] = 0;
+				update_items(text);
+			} while(i && nitem && prev_nitem == nitem);
+			update_items(text);
+		}
+		break;
+	default:
+		if((num == 1) && !iscntrl((int) buf[0])) {
+			buf[num] = 0;
+			if(len > 0)
+				strncat(text, buf, sizeof(text));
+			else
+				strncpy(text, buf, sizeof(text));
+			update_items(text);
+		}
+	}
+	draw_menu();
+}
+
+static char *
+read_allitems()
+{
+	static char *maxname = 0;
+	char *p, buf[1024];
+	unsigned int len = 0, max = 0;
+	Item *i, *new;
+
+	i = 0;
+	while(fgets(buf, sizeof(buf), stdin)) {
+		len = strlen(buf);
+		if (buf[len - 1] == '\n')
+			buf[len - 1] = 0;
+		p = estrdup(buf);
+		if(max < len) {
+			maxname = p;
+			max = len;
+		}
+
+		new = emalloc(sizeof(Item));
+		new->next = new->left = new->right = 0;
+		new->text = p;
+		if(!i)
+			allitem = new;
+		else 
+			i->next = new;
+		i = new;
+	}
+
+	return maxname;
+}
+
+int
+main(int argc, char *argv[])
+{
+	int i;
+	XSetWindowAttributes wa;
+	char *maxname;
+	XEvent ev;
+
+	/* command line args */
+	for(i = 1; i < argc; i++) {
+		if (argv[i][0] == '-')
+			switch (argv[i][1]) {
+			case 'v':
+				fprintf(stdout, "%s", version);
+				exit(0);
+				break;
+			case 't':
+				if(++i < argc)
+					title = argv[i];
+				else
+					usage();
+				break;
+			default:
+				usage();
+				break;
+			}
+		else
+			usage();
+	}
+
+	dpy = XOpenDisplay(0);
+	if(!dpy)
+		error("gridmenu: cannot open dpy\n");
+	screen = DefaultScreen(dpy);
+	root = RootWindow(dpy, screen);
+
+	maxname = read_allitems();
+
+	/* grab as early as possible, but after reading all items!!! */
+	while(XGrabKeyboard(dpy, root, True, GrabModeAsync,
+			 GrabModeAsync, CurrentTime) != GrabSuccess)
+		usleep(1000);
+
+	/* style */
+	loadcolors(dpy, screen, &brush, BGCOLOR, FGCOLOR, BORDERCOLOR);
+	loadfont(dpy, &brush.font, FONT);
+
+	wa.override_redirect = 1;
+	wa.background_pixmap = ParentRelative;
+	wa.event_mask = ExposureMask | ButtonPressMask | KeyPressMask
+		| SubstructureRedirectMask | SubstructureNotifyMask;
+
+	rect.width = DisplayWidth(dpy, screen);
+	rect.height = brush.font.height + 4;
+	rect.y = DisplayHeight(dpy, screen) - rect.height;
+	rect.x = 0;
+
+	win = XCreateWindow(dpy, root, rect.x, rect.y,
+			rect.width, rect.height, 0, DefaultDepth(dpy, screen),
+			CopyFromParent, DefaultVisual(dpy, screen),
+			CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
+	XDefineCursor(dpy, win, XCreateFontCursor(dpy, XC_xterm));
+	XFlush(dpy);
+
+	/* pixmap */
+	brush.gc = XCreateGC(dpy, win, 0, 0);
+	brush.drawable = XCreatePixmap(dpy, win, rect.width, rect.height,
+			DefaultDepth(dpy, screen));
+	XFlush(dpy);
+
+	if(maxname)
+		cwidth = textwidth(&brush.font, maxname) + brush.font.height;
+	if(cwidth > rect.width / 3)
+		cwidth = rect.width / 3;
+
+	if(title) {
+		twidth = textwidth(&brush.font, title) + brush.font.height;
+		if(twidth > rect.width / 3)
+			twidth = rect.width / 3;
+	}
+
+	cmdw = title ? twidth : cwidth;
+
+	text[0] = 0;
+	update_items(text);
+	XMapRaised(dpy, win);
+	draw_menu();
+	XFlush(dpy);
+
+	/* main event loop */
+	while(!XNextEvent(dpy, &ev)) {
+		switch (ev.type) {
+			case KeyPress:
+				kpress(&ev.xkey);
+				break;
+			case Expose:
+				if(ev.xexpose.count == 0) {
+					draw_menu();
+				}
+				break;
+			default:
+				break;
+		}
+		if(done)
+			break;
+	}
+
+	XUngrabKeyboard(dpy, CurrentTime);
+	XFreePixmap(dpy, brush.drawable);
+	XFreeGC(dpy, brush.gc);
+	XDestroyWindow(dpy, win);
+	XCloseDisplay(dpy);
+
+	return ret;
+}