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/* xmenu
* a simple fuzzy-selection menu made with Xlib
*/
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/XKBlib.h>
#include <stdio.h>
#include "ui.h"
#include "dynarr.h"
static Display *dsp;
static Window win;
static int scr;
static unsigned long fg, bg;
static XSizeHints szhint;
static GC gc;
static Font freg, fital;
/* TODO: center menu on screen */
void
ui_init(int argc, char **argv)
{
dsp = XOpenDisplay("");
scr = DefaultScreen(dsp);
fg = BlackPixel(dsp, scr);
bg = WhitePixel(dsp, scr);
szhint = (XSizeHints) { 0 };
szhint.width = 350;
szhint.height = 250;
szhint.flags = PSize;
win = XCreateSimpleWindow(
dsp,
DefaultRootWindow(dsp),
szhint.x, szhint.y,
szhint.width, szhint.height,
5 /* border width */,
fg, bg);
/* TODO: replace with modern XSetWMProperties */
char title[] = "xmenu";
XSetStandardProperties(dsp, win, title, title,
None, argv, argc, &szhint);
gc = XCreateGC(dsp, win, 0, 0);
XSetBackground(dsp, gc, bg);
XSetForeground(dsp, gc, fg);
XSelectInput(dsp, win, ButtonPressMask | KeyPressMask | ExposureMask);
XMapRaised(dsp, win);
freg = XLoadFont(dsp, "-*-new century schoolbook-medium-r-*-*-24-*-*-*-*-*-*-*");
fital = XLoadFont(dsp, "-*-new century schoolbook-medium-i-*-*-24-*-*-*-*-*-*-*");
}
UiKey
xksym_to_uik(KeySym sym)
{
switch (sym) {
case XK_Escape: return UIK_ESCAPE;
case XK_BackSpace: return UIK_BACKSPACE;
case XK_Up: return UIK_UP;
case XK_Down: return UIK_DOWN;
case XK_Left: return UIK_LEFT;
case XK_Right: return UIK_RIGHT;
case XK_Return: return UIK_RETURN;
case XK_Home: return UIK_HOME;
case XK_End: return UIK_END;
case XK_Page_Down: return UIK_PGDN;
case XK_Page_Up: return UIK_PGUP;
default: return UIK_UNKNOWN;
}
}
int
ui_wait_event(UiEvent *e)
{
XEvent ev;
KeySym sym;
XNextEvent(dsp, &ev);
switch (ev.type) {
case KeyPress:
e->type = UI_KEY_DOWN;
e->key.strn = XLookupString(&ev.xkey, e->key.str, 10, &sym, 0);
e->key.key = xksym_to_uik(sym);
return 1;
case KeyRelease:
e->type = UI_KEY_UP;
e->key.strn = XLookupString(&ev.xkey, e->key.str, 10, &sym, 0);
e->key.key = xksym_to_uik(sym);
return 1;
case Expose:
e->type = UI_REDRAW;
return 1;
}
fprintf(stderr, "[Unknown event %d]\n", ev.type);
return 0;
}
void
ui_draw(Str input, int inpi, int seli, Str *optv, int optc)
{
XWindowAttributes attr;
XClearWindow(dsp, win);
XGetWindowAttributes(dsp, win, &attr);
/* draw input */
XSetFont(dsp, gc, fital);
XDrawString(dsp, win, gc, 16, 24, input.s, input.n);
XFontStruct *f = XQueryFont(dsp, XGContextFromGC(gc));
int w = XTextWidth(f, input.s, inpi);
XDrawLine(dsp, win, gc, 16 + w, 24 - f->ascent, 16 + w, 24 + f->descent);
/* draw options */
XSetFont(dsp, gc, freg);
for (int i = 0; i < optc; i++) {
if (i == seli) {
int w = XTextWidth(XQueryFont(dsp,
XGContextFromGC(gc)),
optv[i].s, optv[i].n);
XFillRectangle(dsp, win, gc,
16, 28 + i * 24 + 8,
w, 24);
XSetForeground(dsp, gc, bg);
XDrawString(dsp, win, gc,
16, 48 + i * 24 + 8,
optv[i].s, optv[i].n);
XSetForeground(dsp, gc, fg);
} else {
XDrawString(dsp, win, gc,
16, 48 + i * 24 + 8,
optv[i].s, optv[i].n);
}
}
}
void
ui_fini(void)
{
XUnloadFont(dsp, freg);
XUnloadFont(dsp, fital);
XFreeGC(dsp, gc);
XDestroyWindow(dsp, win);
XCloseDisplay(dsp);
}
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