ref: 4024ba789b30f0586f1caf01653d663570e3c001
dir: /wctl.c/
#include "inc.h"
/*
* TODO: i feel like this could use some cleanup
*/
char Ebadwr[] = "bad rectangle in wctl request";
char Ewalloc[] = "window allocation failed in wctl request";
/* >= Top are disallowed if mouse button is pressed */
enum
{
New,
Resize,
Move,
Scroll,
Noscroll,
Set,
Top,
Bottom,
Current,
Hide,
Unhide,
Delete,
};
static char *cmds[] = {
[New] = "new",
[Resize] = "resize",
[Move] = "move",
[Scroll] = "scroll",
[Noscroll] = "noscroll",
[Set] = "set",
[Top] = "top",
[Bottom] = "bottom",
[Current] = "current",
[Hide] = "hide",
[Unhide] = "unhide",
[Delete] = "delete",
nil
};
enum
{
Cd,
Deltax,
Deltay,
Hidden,
Id,
Maxx,
Maxy,
Minx,
Miny,
PID,
R,
Scrolling,
Noscrolling,
};
static char *params[] = {
[Cd] = "-cd",
[Deltax] = "-dx",
[Deltay] = "-dy",
[Hidden] = "-hide",
[Id] = "-id",
[Maxx] = "-maxx",
[Maxy] = "-maxy",
[Minx] = "-minx",
[Miny] = "-miny",
[PID] = "-pid",
[R] = "-r",
[Scrolling] = "-scroll",
[Noscrolling] = "-noscroll",
nil
};
static int
word(char **sp, char *tab[])
{
char *s, *t;
int i;
s = *sp;
while(isspacerune(*s))
s++;
t = s;
while(*s!='\0' && !isspacerune(*s))
s++;
for(i=0; tab[i]!=nil; i++)
if(strncmp(tab[i], t, strlen(tab[i])) == 0){
*sp = s;
return i;
}
return -1;
}
int
set(int sign, int neg, int abs, int pos)
{
if(sign < 0)
return neg;
if(sign > 0)
return pos;
return abs;
}
void
shift(int *minp, int *maxp, int min, int max)
{
if(*maxp > max){
*minp += max-*maxp;
*maxp = max;
}
if(*minp < min){
*maxp += min-*minp;
if(*maxp > max)
*maxp = max;
*minp = min;
}
}
Rectangle
rectonscreen(Rectangle r)
{
shift(&r.min.x, &r.max.x, screen->r.min.x, screen->r.max.x);
shift(&r.min.y, &r.max.y, screen->r.min.y, screen->r.max.y);
return r;
}
/* permit square brackets, in the manner of %R */
int
riostrtol(char *s, char **t)
{
int n;
while(*s!='\0' && (*s==' ' || *s=='\t' || *s=='['))
s++;
if(*s == '[')
s++;
n = strtol(s, t, 10);
if(*t != s)
while((*t)[0] == ']')
(*t)++;
return n;
}
Wctlcmd
parsewctl(char *s, Rectangle r)
{
Wctlcmd cmd;
int n, nt, param, xy, sign;
char *f[2], *t;
cmd.pid = 0;
cmd.hidden = FALSE;
cmd.scrolling = scrolling;
cmd.dir = nil;
cmd.error = nil;
cmd.cmd = word(&s, cmds);
if(cmd.cmd < 0)
goto Lose;
if(cmd.cmd == New)
r = newrect();
while((param = word(&s, params)) >= 0){
switch(param){ /* special cases */
case Hidden:
cmd.hidden = TRUE;
continue;
case Scrolling:
cmd.scrolling = TRUE;
continue;
case Noscrolling:
cmd.scrolling = FALSE;
continue;
case R:
r.min.x = riostrtol(s, &t);
if(t == s)
goto Lose;
s = t;
r.min.y = riostrtol(s, &t);
if(t == s)
goto Lose;
s = t;
r.max.x = riostrtol(s, &t);
if(t == s)
goto Lose;
s = t;
r.max.y = riostrtol(s, &t);
if(t == s)
goto Lose;
s = t;
continue;
}
while(isspacerune(*s))
s++;
if(param == Cd){
cmd.dir = s;
if((nt = gettokens(cmd.dir, f, nelem(f), " \t\r\n\v\f")) < 1)
goto Lose;
n = strlen(cmd.dir);
if(cmd.dir[0] == '\'' && cmd.dir[n-1] == '\'')
(cmd.dir++)[n-1] = '\0'; /* drop quotes */
s += n+(nt-1);
continue;
}
sign = 0;
if(*s == '-'){
sign = -1;
s++;
}else if(*s == '+'){
sign = +1;
s++;
}
if(!isdigitrune(*s))
goto Lose;
xy = riostrtol(s, &s);
switch(param){
case -1:
cmd.error = "unrecognized wctl parameter";
return cmd;
case Minx:
r.min.x = set(sign, r.min.x-xy, xy, r.min.x+xy);
break;
case Miny:
r.min.y = set(sign, r.min.y-xy, xy, r.min.y+xy);
break;
case Maxx:
r.max.x = set(sign, r.max.x-xy, xy, r.max.x+xy);
break;
case Maxy:
r.max.y = set(sign, r.max.y-xy, xy, r.max.y+xy);
break;
case Deltax:
r.max.x = set(sign, r.max.x-xy, r.min.x+xy, r.max.x+xy);
break;
case Deltay:
r.max.y = set(sign, r.max.y-xy, r.min.y+xy, r.max.y+xy);
break;
case Id:
cmd.id = xy;
break;
case PID:
cmd.pid = xy;
break;
}
}
cmd.r = rectonscreen(rectaddpt(r, screen->r.min));
while(isspacerune(*s))
s++;
if(cmd.cmd != New && *s != '\0'){
cmd.error = "extraneous text in wctl message";
return cmd;
}
cmd.args = s;
return cmd;
Lose:
cmd.error = "unrecognized wctl command";
return cmd;
}
char*
wctlcmd(Window *w, Rectangle r, int cmd)
{
switch(cmd){
case Move:
if(!goodrect(r))
return Ebadwr;
if(!eqpt(r.min, w->img->r.min))
wmove(w, r.min);
break;
case Resize:
if(!goodrect(r))
return Ebadwr;
if(!eqrect(r, w->img->r))
wresize(w, r);
break;
// TODO: these three work somewhat differently in rio
case Top:
wraise(w);
break;
case Bottom:
wlower(w);
break;
case Current:
if(w->hidden)
return "window is hidden";
wfocus(w);
wraise(w);
break;
case Hide:
switch(whide(w)){
case -1: return "window already hidden";
case 0: return "hide failed";
}
break;
case Unhide:
switch(wunhide(w)){
case -1: return "window not hidden";
case 0: return "hide failed";
}
break;
case Delete:
wdelete(w);
break;
case Scroll:
w->scrolling = TRUE;
xshow(&w->text, w->text.nr);
wsendmsg(w, Wakeup);
break;
case Noscroll:
w->scrolling = FALSE;
wsendmsg(w, Wakeup);
break;
default:
return "invalid wctl message";
}
return nil;
}
char*
wctlnew(Wctlcmd cmd)
{
Window *w;
char *argv[4], **args;
w = wcreate(cmd.r, cmd.hidden, cmd.scrolling);
assert(w);
args = nil;
if(cmd.pid == 0){
argv[0] = "rc";
argv[1] = "-c";
while(isspacerune(*cmd.args))
cmd.args++;
if(*cmd.args == '\0'){
argv[1] = "-i";
argv[2] = nil;
}else{
argv[2] = cmd.args;
argv[3] = nil;
}
args = argv;
}
if(wincmd(w, cmd.pid, cmd.dir, args) == 0)
return "window creation failed";
return nil;
}
char*
writewctl(Window *w, char *data)
{
Rectangle r;
Wctlcmd cmd;
if(w == nil)
r = ZR;
else
r = rectsubpt(w->img->r, screen->r.min);
cmd = parsewctl(data, r);
if(cmd.error)
return cmd.error;
if(cmd.id != 0){
w = wfind(cmd.id);
if(w == nil)
return "no such window id";
}
if(w == nil && cmd.cmd != New)
return "command needs to be run within a window";
switch(cmd.cmd){
case New:
return wctlnew(cmd);
case Set:
if(cmd.pid > 0)
wsetpid(w, cmd.pid, 0);
return nil;
default:
incref(w);
cmd.error = wctlcmd(w, cmd.r, cmd.cmd);
wrelease(w);
return cmd.error;
}
}