ref: d4bc9052beb3305d64a353a16641740380eb87af
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 *lightblue; Image *justblue; 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, justblue, nil, ZP); else draw(screen, map[i].r, lightblue, nil, ZP); _string(screen, addpt(map[i].r.min, Pt(2,0)), display->black, ZP, font, map[i].name, nil, strlen(map[i].name), map[i].r, nil, ZP, SoverD); border(screen, map[i].r, 1, display->black, ZP); } void geometry(void) { int i, rows; Rectangle r; rows = (Dy(screen->r)-2*MARGIN+PAD)/(font->height+PAD); r = Rect(0,0,(Dx(screen->r)-2*MARGIN), 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, lightblue, 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]; if((fd = open(file, OREAD)) < 0){ fprint(2, "cannot open %s: %r", file); return -1; } if((ofd = open("/dev/kbmap", OWRITE)) < 0) { fprint(2, "cannot open /dev/kbmap: %r"); close(fd); return -1; } while((i = read(fd, buf, sizeof buf)) > 0) if(write(ofd, buf, i) != i){ fprint(2, "writing /dev/kbmap: %r"); break; } close(fd); close(ofd); return 0; } void click(Mouse m) { int i, j; char buf[128]; 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; /* since maps are often just a delta of the distributed map... */ snprint(buf, sizeof buf, "%s/ascii", dir); writemap(buf); 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"); } lightblue = allocimagemix(display, DPalebluegreen, DWhite); if(lightblue == nil) sysfatal("allocimagemix: %r"); justblue = allocimagemix(display, DBlue, DWhite); if(justblue == nil) sysfatal("allocimagemix: %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; } } }