dmenu/dinput.c

363 lines
8.1 KiB
C

/* See LICENSE file for copyright and license details. */
#include <ctype.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <X11/keysym.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#ifdef XINERAMA
#include <X11/extensions/Xinerama.h>
#endif
#include <draw.h>
/* macros */
#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 drawinput(void);
static void grabkeyboard(void);
static void kpress(XKeyEvent *e);
static void run(void);
static void setup(void);
#include "config.h"
/* variables */
static char *prompt = NULL;
static char text[4096];
static int promptw = 0;
static int screen;
static size_t cursor = 0;
static unsigned int numlockmask = 0;
static unsigned int mw, mh;
static unsigned long normcol[ColLast];
static unsigned long selcol[ColLast];
static Bool topbar = True;
static DC dc;
static Display *dpy;
static Window win, root;
void
cleanup(void) {
cleanupdraw(&dc);
XDestroyWindow(dpy, win);
XUngrabKeyboard(dpy, CurrentTime);
XCloseDisplay(dpy);
}
void
drawinput(void)
{
dc.x = 0;
dc.y = 0;
dc.w = mw;
dc.h = mh;
drawtext(&dc, NULL, normcol);
/* print prompt? */
if(prompt) {
dc.w = promptw;
drawtext(&dc, prompt, selcol);
dc.x += dc.w;
}
dc.w = mw - dc.x;
drawtext(&dc, text, normcol);
drawcursor(&dc, text, cursor, normcol);
commitdraw(&dc, win);
}
void
grabkeyboard(void) {
unsigned int len;
for(len = 1000; len; len--) {
if(XGrabKeyboard(dpy, root, True, GrabModeAsync, GrabModeAsync, CurrentTime)
== GrabSuccess)
return;
usleep(1000);
}
exit(EXIT_FAILURE);
}
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:
case XK_m:
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("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:
exit(EXIT_FAILURE);
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);
exit(EXIT_SUCCESS);
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 */
XSync(dpy, False);
while(!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;
}
exit(EXIT_FAILURE);
}
void
setup(void) {
int i, j, x, y;
#if XINERAMA
int n;
XineramaScreenInfo *info = NULL;
#endif
XModifierKeymap *modmap;
XSetWindowAttributes wa;
/* 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);
dc.dpy = dpy;
normcol[ColBG] = getcolor(&dc, normbgcolor);
normcol[ColFG] = getcolor(&dc, normfgcolor);
selcol[ColBG] = getcolor(&dc, selbgcolor);
selcol[ColFG] = getcolor(&dc, selfgcolor);
initfont(&dc, font);
/* input window */
wa.override_redirect = True;
wa.background_pixmap = ParentRelative;
wa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
/* input window geometry */
mh = dc.font.height + 2;
#if XINERAMA
if(XineramaIsActive(dpy) && (info = XineramaQueryScreens(dpy, &n))) {
i = 0;
if(n > 1) {
int di;
unsigned int dui;
Window dummy;
if(XQueryPointer(dpy, root, &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
{
x = 0;
y = topbar ? 0 : DisplayHeight(dpy, screen) - mh;
mw = DisplayWidth(dpy, screen);
}
win = XCreateWindow(dpy, root, x, y, mw, mh, 0,
DefaultDepth(dpy, screen), CopyFromParent,
DefaultVisual(dpy, screen),
CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
setupdraw(&dc, win);
if(prompt)
promptw = MIN(textw(&dc, prompt), mw / 5);
cursor = strlen(text);
XMapRaised(dpy, win);
}
int
main(int argc, char *argv[]) {
unsigned int i;
/* command line args */
progname = "dinput";
for(i = 1; i < argc; i++)
if(!strcmp(argv[i], "-i"))
; /* ignore flag */
else if(!strcmp(argv[i], "-b"))
topbar = False;
else if(!strcmp(argv[i], "-l"))
i++; /* ignore flag */
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")) {
printf("dinput-"VERSION", © 2006-2010 dinput engineers, see LICENSE for details\n");
exit(EXIT_SUCCESS);
}
else if(!*text)
strncpy(text, argv[i], sizeof text);
else {
fputs("usage: dinput [-b] [-fn <font>] [-nb <color>] [-nf <color>]\n"
" [-p <prompt>] [-sb <color>] [-sf <color>] [-v] [<text>]\n", stderr);
exit(EXIT_FAILURE);
}
if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
fprintf(stderr, "dinput: warning: no locale support\n");
if(!(dpy = XOpenDisplay(NULL)))
eprint("cannot open display\n");
if(atexit(&cleanup) != 0)
eprint("cannot register cleanup\n");
screen = DefaultScreen(dpy);
root = RootWindow(dpy, screen);
grabkeyboard();
setup();
run();
return 0;
}