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