ref: 8f211091301af3a465be701bfdfecf049733dc20
dir: /sys/src/cmd/kbmap.c/
#include <u.h> #include <libc.h> #include <draw.h> #include <event.h> #include <keyboard.h> typedef struct KbMap KbMap; struct KbMap { char *name; char *file; Rectangle r; int current; }; KbMap *map; int nmap; Image *txt, *sel; enum { PAD = 3, MARGIN = 5 }; char *dir = "/sys/lib/kbmap"; void* erealloc(void *v, ulong n) { v = realloc(v, n); if(v == nil) sysfatal("out of memory reallocating %lud", n); return v; } void* emalloc(ulong n) { void *v; v = malloc(n); if(v == nil) sysfatal("out of memory allocating %lud", n); memset(v, 0, n); return v; } char* estrdup(char *s) { int l; char *t; if (s == nil) return nil; l = strlen(s)+1; t = emalloc(l); memcpy(t, s, l); return t; } void init(void) { int i, fd, nr; Dir *pd; if((fd = open(dir, OREAD)) < 0) return; nmap = nr = dirreadall(fd, &pd); map = emalloc(nr * sizeof(KbMap)); for(i=0; i<nr; i++){ map[i].file = emalloc(strlen(dir) + strlen(pd[i].name) + 2); sprint(map[i].file, "%s/%s", dir, pd[i].name); map[i].name = estrdup(pd[i].name); map[i].current = 0; } free(pd); close(fd); } void drawmap(int i) { if(map[i].current) draw(screen, map[i].r, sel, nil, ZP); else draw(screen, map[i].r, display->black, nil, ZP); _string(screen, addpt(map[i].r.min, Pt(2,0)), txt, ZP, font, map[i].name, nil, strlen(map[i].name), map[i].r, nil, ZP, SoverD); border(screen, map[i].r, 1, txt, ZP); } void geometry(void) { int i, rows, cols; Rectangle r; rows = (Dy(screen->r)-2*MARGIN+PAD)/(font->height+PAD); if(rows < 1) rows = 1; cols = (nmap+rows-1)/rows; if(cols < 1) cols = 1; r = Rect(0,0,(Dx(screen->r)-2*MARGIN+PAD)/cols-PAD, font->height); for(i=0; i<nmap; i++) map[i].r = rectaddpt(rectaddpt(r, Pt(MARGIN+(PAD+Dx(r))*(i/rows), MARGIN+(PAD+Dy(r))*(i%rows))), screen->r.min); } void redraw(Image *screen) { int i; draw(screen, screen->r, display->black, nil, ZP); for(i=0; i<nmap; i++) drawmap(i); flushimage(display, 1); } void eresized(int new) { if(new && getwindow(display, Refmesg) < 0) fprint(2,"can't reattach to window"); geometry(); redraw(screen); } int writemap(char *file) { int i, fd, ofd; char buf[8192]; int n; char *p; if((fd = open(file, OREAD)) < 0){ fprint(2, "cannot open %s: %r\n", file); return -1; } if((ofd = open("/dev/kbmap", OWRITE|OTRUNC)) < 0){ fprint(2, "cannot open /dev/kbmap: %r\n"); close(fd); return -1; } /* do not write half lines */ n = 0; while((i = read(fd, buf + n, sizeof buf - 1 - n)) > 0){ n += i; buf[n] = '\0'; p = strrchr(buf, '\n'); if(p == nil){ if(n == sizeof buf - 1){ fprint(2, "writing /dev/kbmap: line too long\n"); break; } continue; } p++; if(write(ofd, buf, p - buf) != p - buf){ fprint(2, "writing /dev/kbmap: %r\n"); break; } n -= p - buf; memmove(buf, p, n); } close(fd); close(ofd); return 0; } void click(Mouse m) { int i, j; if(m.buttons == 0 || (m.buttons & ~4)) return; for(i=0; i<nmap; i++) if(ptinrect(m.xy, map[i].r)) break; if(i == nmap) return; do m = emouse(); while(m.buttons == 4); if(m.buttons != 0){ do m = emouse(); while(m.buttons); return; } for(j=0; j<nmap; j++) if(ptinrect(m.xy, map[j].r)) break; if(j != i) return; writemap(map[i].file); /* clean the previous current map */ for(j=0; j<nmap; j++) map[j].current = 0; map[i].current = 1; redraw(screen); } void usage(void) { fprint(2, "usage: kbmap [file...]\n"); exits("usage"); } void main(int argc, char **argv) { Event e; char *c; if(argc > 1) { argv++; argc--; map = emalloc((argc)*sizeof(KbMap)); while(argc--) { map[argc].file = estrdup(argv[argc]); c = strrchr(map[argc].file, '/'); map[argc].name = (c == nil ? map[argc].file : c+1); map[argc].current = 0; nmap++; } } else init(); if(initdraw(0, 0, "kbmap") < 0){ fprint(2, "kbmap: initdraw failed: %r\n"); exits("initdraw"); } enum{ Ctxt, Csel, Ncols, }; Theme th[Ncols] = { [Ctxt] { "text", 0xEAFFFFFF }, [Csel] { "hold", DBlue }, }; readtheme(th, nelem(th), nil); txt = allocimage(display, Rect(0,0,1,1), screen->chan, 1, th[Ctxt].c); sel = allocimage(display, Rect(0,0,1,1), screen->chan, 1, th[Csel].c); if(txt == nil || sel == nil) sysfatal("allocimage: %r"); eresized(0); einit(Emouse|Ekeyboard); for(;;){ switch(eread(Emouse|Ekeyboard, &e)){ case Ekeyboard: if(e.kbdc==Kdel || e.kbdc=='q') exits(0); break; case Emouse: if(e.mouse.buttons) click(e.mouse); break; } } }