initial dmenu / dinput separation

1 files changed, 387 insertions, 0 deletions

diff --git a/dinput.c b/dinput.c
new file mode 100644
index 0000000..490380d
--- /dev/null
+++ b/dinput.c
@@ -0,0 +1,387 @@
+/* See LICENSE file for copyright and license details. */
+#include <ctype.h>
+#include <locale.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <strings.h>
+#include <unistd.h>
+#include <X11/keysym.h>
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#ifdef XINERAMA
+#include <X11/extensions/Xinerama.h>
+#endif
+
+/* macros */
+#define CLEANMASK(mask)         (mask & ~(numlockmask | LockMask))
+#define INRECT(X,Y,RX,RY,RW,RH) ((X) >= (RX) && (X) < (RX) + (RW) && (Y) >= (RY) && (Y) < (RY) + (RH))
+#define MIN(a, b)               ((a) < (b) ? (a) : (b))
+#define MAX(a, b)               ((a) > (b) ? (a) : (b))
+#define IS_UTF8_1ST_CHAR(c)     ((((c) & 0xc0) == 0xc0) || !((c) & 0x80))
+
+/* forward declarations */
+static void cleanup(void);
+static void drawcursor(void);
+static void drawinput(void);
+static void eprint(const char *errstr, ...);
+static Bool grabkeyboard(void);
+static void kpress(XKeyEvent * e);
+static void run(void);
+static void setup(Bool topbar);
+
+#include "config.h"
+
+/* variables */
+static char *prompt = NULL;
+static char text[4096];
+static int promptw = 0;
+static int ret = 0;
+static int screen;
+static unsigned int mw, mh;
+static unsigned int cursor = 0;
+static unsigned int numlockmask = 0;
+static Bool running = True;
+static Display *dpy;
+static Window parent, win;
+
+#include "draw.c"
+
+void
+cleanup(void) {
+	dccleanup();
+	XDestroyWindow(dpy, win);
+	XUngrabKeyboard(dpy, CurrentTime);
+}
+
+void
+drawcursor(void) {
+	XRectangle r = { dc.x, dc.y + 2, 1, dc.font.height - 2 };
+
+	r.x += textnw(text, cursor) + dc.font.height / 2;
+
+	XSetForeground(dpy, dc.gc, dc.norm[ColFG]);
+	XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
+}
+
+void
+drawinput(void)
+{
+	dc.x = 0;
+	dc.y = 0;
+	dc.w = mw;
+	dc.h = mh;
+	drawtext(NULL, dc.norm);
+	/* print prompt? */
+	if(prompt) {
+		dc.w = promptw;
+		drawtext(prompt, dc.sel);
+		dc.x += dc.w;
+	}
+	dc.w = mw - dc.x;
+	drawtext(*text ? text : NULL, dc.norm);
+	drawcursor();
+	XCopyArea(dpy, dc.drawable, win, dc.gc, 0, 0, mw, mh, 0, 0);
+	XFlush(dpy);
+}
+
+void
+eprint(const char *errstr, ...) {
+	va_list ap;
+
+	va_start(ap, errstr);
+	vfprintf(stderr, errstr, ap);
+	va_end(ap);
+	exit(EXIT_FAILURE);
+}
+
+Bool
+grabkeyboard(void) {
+	unsigned int len;
+
+	for(len = 1000; len; len--) {
+		if(XGrabKeyboard(dpy, parent, True, GrabModeAsync, GrabModeAsync, CurrentTime)
+		== GrabSuccess)
+			break;
+		usleep(1000);
+	}
+	return len > 0;
+}
+
+void
+kpress(XKeyEvent * e) {
+	char buf[sizeof text];
+	int num;
+	unsigned int i, len;
+	KeySym ksym;
+
+	len = strlen(text);
+	num = XLookupString(e, buf, sizeof buf, &ksym, NULL);
+	if(ksym == XK_KP_Enter)
+		ksym = XK_Return;
+	else if(ksym >= XK_KP_0 && ksym <= XK_KP_9)
+		ksym = (ksym - XK_KP_0) + XK_0;
+	else 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(tolower(ksym)) {
+		default:
+			return;
+		case XK_a:
+			ksym = XK_Home;
+			break;
+		case XK_b:
+			ksym = XK_Left;
+			break;
+		case XK_c:
+			ksym = XK_Escape;
+			break;
+		case XK_e:
+			ksym = XK_End;
+			break;
+		case XK_f:
+			ksym = XK_Right;
+			break;
+		case XK_h:
+			ksym = XK_BackSpace;
+			break;
+		case XK_j:
+			ksym = XK_Return;
+			break;
+		case XK_k:
+			text[cursor] = '\0';
+			break;
+		case XK_u:
+			memmove(text, text + cursor, sizeof text - cursor + 1);
+			cursor = 0;
+			break;
+		case XK_w:
+			if(cursor > 0) {
+				i = cursor;
+				while(i-- > 0 && text[i] == ' ');
+				while(i-- > 0 && text[i] != ' ');
+				memmove(text + i + 1, text + cursor, sizeof text - cursor + 1);
+				cursor = i + 1;
+			}
+			break;
+		case XK_y:
+			{
+				FILE *fp;
+				char *s;
+				if(!(fp = popen("sselp", "r")))
+					eprint("dinput: cannot popen sselp\n");
+				s = fgets(buf, sizeof buf, fp);
+				pclose(fp);
+				if(s == NULL)
+					return;
+			}
+			num = strlen(buf);
+			if(num && buf[num-1] == '\n')
+				buf[--num] = '\0';
+			break;
+		}
+	}
+	switch(ksym) {
+	default:
+		num = MIN(num, sizeof text - cursor);
+		if(num && !iscntrl((int) buf[0])) {
+			memmove(text + cursor + num, text + cursor, sizeof text - cursor - num);
+			memcpy(text + cursor, buf, num);
+			cursor += num;
+		}
+		break;
+	case XK_BackSpace:
+		if(cursor == 0)
+			return;
+		for(i = 1; cursor - i > 0 && !IS_UTF8_1ST_CHAR(text[cursor - i]); i++);
+		memmove(text + cursor - i, text + cursor, sizeof text - cursor + i);
+		cursor -= i;
+		break;
+	case XK_Delete:
+		if(cursor == len)
+			return;
+		for(i = 1; cursor + i < len && !IS_UTF8_1ST_CHAR(text[cursor + i]); i++);
+		memmove(text + cursor, text + cursor + i, sizeof text - cursor);
+		break;
+	case XK_End:
+		cursor = len;
+		break;
+	case XK_Escape:
+		ret = 1;
+		running = False;
+		return;
+	case XK_Home:
+		cursor = 0;
+		break;
+	case XK_Left:
+		if(cursor == 0)
+			return;
+		while(cursor-- > 0 && !IS_UTF8_1ST_CHAR(text[cursor]));
+		break;
+	case XK_Return:
+		fprintf(stdout, "%s", text);
+		fflush(stdout);
+		running = False;
+		return;
+	case XK_Right:
+		if(cursor == len)
+			return;
+		while(cursor++ < len && !IS_UTF8_1ST_CHAR(text[cursor]));
+		break;
+	}
+	drawinput();
+}
+
+void
+run(void) {
+	XEvent ev;
+
+	/* main event loop */
+	while(running && !XNextEvent(dpy, &ev))
+		switch (ev.type) {
+		case KeyPress:
+			kpress(&ev.xkey);
+			break;
+		case Expose:
+			if(ev.xexpose.count == 0)
+				drawinput();
+			break;
+		case VisibilityNotify:
+			if (ev.xvisibility.state != VisibilityUnobscured)
+				XRaiseWindow(dpy, win);
+			break;
+		}
+}
+
+void
+setup(Bool topbar) {
+	int i, j, x, y;
+#if XINERAMA
+	int n;
+	XineramaScreenInfo *info = NULL;
+#endif
+	XModifierKeymap *modmap;
+	XSetWindowAttributes wa;
+	XWindowAttributes pwa;
+
+	/* init modifier map */
+	modmap = XGetModifierMapping(dpy);
+	for(i = 0; i < 8; i++)
+		for(j = 0; j < modmap->max_keypermod; j++) {
+			if(modmap->modifiermap[i * modmap->max_keypermod + j]
+			== XKeysymToKeycode(dpy, XK_Num_Lock))
+				numlockmask = (1 << i);
+		}
+	XFreeModifiermap(modmap);
+
+	/* style */
+	dc.norm[ColBG] = getcolor(normbgcolor);
+	dc.norm[ColFG] = getcolor(normfgcolor);
+	dc.sel[ColBG] = getcolor(selbgcolor);
+	dc.sel[ColFG] = getcolor(selfgcolor);
+	initfont(font);
+
+	/* menu window */
+	wa.override_redirect = True;
+	wa.background_pixmap = ParentRelative;
+	wa.event_mask = ExposureMask | ButtonPressMask | KeyPressMask | VisibilityChangeMask;
+
+	/* menu window geometry */
+	mh = (dc.font.height + 2);
+#if XINERAMA
+	if(parent == RootWindow(dpy, screen) && XineramaIsActive(dpy) && (info = XineramaQueryScreens(dpy, &n))) {
+		i = 0;
+		if(n > 1) {
+			int di;
+			unsigned int dui;
+			Window dummy;
+			if(XQueryPointer(dpy, parent, &dummy, &dummy, &x, &y, &di, &di, &dui))
+				for(i = 0; i < n; i++)
+					if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
+						break;
+		}
+		x = info[i].x_org;
+		y = topbar ? info[i].y_org : info[i].y_org + info[i].height - mh;
+		mw = info[i].width;
+		XFree(info);
+	}
+	else
+#endif
+	{
+		XGetWindowAttributes(dpy, parent, &pwa);
+		x = 0;
+		y = topbar ? 0 : pwa.height - mh;
+		mw = pwa.width;
+	}
+
+	win = XCreateWindow(dpy, parent, x, y, mw, mh, 0,
+			DefaultDepth(dpy, screen), CopyFromParent,
+			DefaultVisual(dpy, screen),
+			CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
+
+	/* pixmap */
+	dcsetup();
+	if(prompt)
+		promptw = MIN(textw(prompt), mw / 5);
+	cursor = strlen(text);
+	XMapRaised(dpy, win);
+}
+
+int
+main(int argc, char *argv[]) {
+	unsigned int i;
+	Bool topbar = True;
+
+	/* command line args */
+	for(i = 1; i < argc; i++)
+		if(!strcmp(argv[i], "-b"))
+			topbar = False;
+		else if(!strcmp(argv[i], "-e")) {
+			if(++i < argc) parent = atoi(argv[i]);
+		}
+		else if(!strcmp(argv[i], "-fn")) {
+			if(++i < argc) font = argv[i];
+		}
+		else if(!strcmp(argv[i], "-nb")) {
+			if(++i < argc) normbgcolor = argv[i];
+		}
+		else if(!strcmp(argv[i], "-nf")) {
+			if(++i < argc) normfgcolor = argv[i];
+		}
+		else if(!strcmp(argv[i], "-p")) {
+			if(++i < argc) prompt = argv[i];
+		}
+		else if(!strcmp(argv[i], "-sb")) {
+			if(++i < argc) selbgcolor = argv[i];
+		}
+		else if(!strcmp(argv[i], "-sf")) {
+			if(++i < argc) selfgcolor = argv[i];
+		}
+		else if(!strcmp(argv[i], "-v"))
+			eprint("dinput-"VERSION", © 2006-2010 dinput engineers, see LICENSE for details\n");
+		else if(!*text)
+			strncpy(text, argv[i], sizeof text);
+		else
+			eprint("usage: dinput [-b] [-e <xid>] [-fn <font>] [-nb <color>] [-nf <color>]\n"
+			       "              [-p <prompt>] [-sb <color>] [-sf <color>] [-v] [<text>]\n");
+	if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
+		fprintf(stderr, "dinput: warning: no locale support\n");
+	if(!(dpy = XOpenDisplay(NULL)))
+		eprint("dinput: cannot open display\n");
+	screen = DefaultScreen(dpy);
+	if(!parent)
+		parent = RootWindow(dpy, screen);
+
+	running = grabkeyboard();
+	setup(topbar);
+	drawinput();
+	XSync(dpy, False);
+	run();
+	cleanup();
+	XCloseDisplay(dpy);
+	return ret;
+}