ref: 53d55013598d7cd214d01cbf0b026844fe7ca8d2
dir: /sys/src/cmd/mothra/libpanel/entry.c/
#include <u.h>
#include <libc.h>
#include <draw.h>
#include <event.h>
#include <panel.h>
#include "pldefs.h"
#include <keyboard.h>
typedef struct Entry Entry;
struct Entry{
Rectangle lastr;
Rune *entry;
char *sentry;
int sz, n;
int a, b;
Point text;
void (*hit)(Panel *, char *);
Point minsize;
};
#define SLACK 7 /* enough for one extra rune and ◀ and a nul */
void pl_cutentry(Panel *p){
Entry *ep;
ep=p->data;
memmove(ep->entry+ep->a, ep->entry+ep->b, (ep->n-ep->b)*sizeof(Rune));
ep->n -= ep->b-ep->a;
ep->entry[ep->n]=0;
ep->b=ep->a;
}
char *pl_snarfentry(Panel *p){
Entry *ep;
int n;
if(p->flags&USERFL) /* no snarfing from password entry */
return nil;
ep=p->data;
n=ep->b-ep->a;
if(n<1) return nil;
return smprint("%.*S", n, ep->entry+ep->a);
}
void pl_pasteentry(Panel *p, char *s){
Entry *ep;
int m;
ep=p->data;
m=utflen(s);
ep->sz=ep->n+m+100+SLACK;
ep->entry=pl_erealloc(ep->entry,ep->sz*sizeof(Rune));
memmove(ep->entry+ep->a+m, ep->entry+ep->b, (ep->n-ep->b)*sizeof(Rune));
ep->n+=m-(ep->b-ep->a);
while(m-- > 0)
s += chartorune(&ep->entry[ep->a++], s);
ep->b=ep->a;
ep->entry[ep->n]=0;
pldraw(p, p->b);
}
static void drawentry(Panel *p, Rectangle r, Rune *s){
Rectangle save;
Point tick;
Entry *ep;
Image *b;
int d;
ep = p->data;
b = p->b;
ep->text = r.min;
ep->lastr = r;
tick = ep->text;
tick.x += runestringnwidth(font, s, ep->a);
if(plkbfocus == p)
r.max.x -= TICKW;
ep->text.y = r.min.y;
if(!ptinrect(tick, r)){
d = 0;
if(tick.x < r.min.x)
d = r.min.x - tick.x;
else if(tick.x > r.max.x)
d = r.max.x - tick.x;
tick.x += d;
ep->text.x += d;
}
if(plkbfocus == p)
r.max.x += TICKW;
save = b->clipr;
if(!rectclip(&r, save))
return;
replclipr(b, b->repl, r);
runestring(b, ep->text, pl_black, ZP, font, s);
if(plkbfocus == p){
r.min = tick;
if(ep->a != ep->b){
r.max.x = ep->text.x+runestringnwidth(font, s, ep->b);
if(r.max.x < r.min.x){
d = r.min.x;
r.min.x = r.max.x;
r.max.x = d;
}
pl_highlight(b, r);
}else
pl_drawtick(b, r);
}
replclipr(b, b->repl, save);
}
void pl_drawentry(Panel *p){
Rectangle r;
Entry *ep;
Rune *s;
ep=p->data;
r=pl_box(p->b, p->r, p->state|BORDER);
s=ep->entry;
if(p->flags & USERFL){
Rune *p;
s=runestrdup(s);
for(p=s; *p; p++)
*p='*';
}
drawentry(p, r, s);
if(s != ep->entry)
free(s);
}
int pl_hitentry(Panel *p, Mouse *m){
Entry *ep;
int i, n, selecting;
if((m->buttons&7)==1){
if(plkbfocus != p)
p->state=DOWN;
plgrabkb(p);
ep = p->data;
for(i = 1; i <= ep->n; i++)
if(runestringnwidth(font, ep->entry, i) > m->xy.x-ep->text.x)
break;
n = i-1;
ep->a = ep->b = n;
pldraw(p, p->b);
selecting = 1;
while(m->buttons&1){
int old;
old=m->buttons;
if(display->bufp > display->buf)
flushimage(display, 1);
*m=emouse();
p->state=UP;
if((old&7)==1){
if((m->buttons&7)==3){
plsnarf(p);
pl_cutentry(p);
pldraw(p, p->b);
ep->b = n = ep->a;
}
if(selecting && (m->buttons&7)==1){
p->state=UP;
for(i = 0; i < ep->n; i++)
if(runestringnwidth(font, ep->entry, i)+TICKW > m->xy.x-ep->text.x)
break;
/*
* tick is moved towards the mouse pointer dragging the selection
* after drawing it has to be set so that (a <= b), since
* the rest of the logic assumes that's always the case
*/
ep->a = i;
ep->b = n;
pldraw(p, p->b);
if(ep->a > ep->b){
ep->a = n;
ep->b = i;
}
}else
selecting = 0;
if((m->buttons&7)==5)
plpaste(p);
}
}
p->state=UP;
pldraw(p, p->b);
}
return 0;
}
void pl_typeentry(Panel *p, Rune c){
Entry *ep;
ep=p->data;
switch(c){
case '\n':
case '\r':
if(ep->hit) ep->hit(p, plentryval(p));
return;
case Kleft:
if(ep->a > 0)
ep->a--;
ep->b=ep->a;
break;
case Kright:
if(ep->a<ep->n)
ep->a++;
ep->b = ep->a;
break;
case Ksoh:
ep->a=ep->b=0;
break;
case Kenq:
ep->a=ep->b=ep->n;
break;
case Kesc:
ep->a=0;
ep->b=ep->n;
plsnarf(p);
/* no break */
case Kdel: /* clear */
ep->a = ep->b = ep->n = 0;
*ep->entry = 0;
break;
case Knack: /* ^U: erase line */
ep->a = 0;
pl_cutentry(p);
break;
case Kbs: /* ^H: erase character */
if(ep->a > 0 && ep->a == ep->b)
ep->a--;
/* wet floor */
if(0){
case Ketb: /* ^W: erase word */
while(ep->a>0 && !pl_idchar(ep->entry[ep->a-1]))
--ep->a;
while(ep->a>0 && pl_idchar(ep->entry[ep->a-1]))
--ep->a;
}
pl_cutentry(p);
break;
default:
if(c < 0x20 || (c & 0xFF00) == KF || (c & 0xFF00) == Spec)
break;
memmove(ep->entry+ep->a+1, ep->entry+ep->b, (ep->n-ep->b)*sizeof(Rune));
ep->n -= ep->b - ep->a - 1;
ep->entry[ep->a++] = c;
ep->b = ep->a;
if(ep->n>ep->sz){
ep->sz = ep->n+100;
ep->entry=pl_erealloc(ep->entry, (ep->sz+SLACK)*sizeof(Rune));
}
ep->entry[ep->n]=0;
break;
}
pldraw(p, p->b);
}
Point pl_getsizeentry(Panel *p, Point children){
USED(children);
return pl_boxsize(((Entry *)p->data)->minsize, p->state);
}
void pl_childspaceentry(Panel *p, Point *ul, Point *size){
USED(p, ul, size);
}
void pl_freeentry(Panel *p){
Entry *ep;
ep = p->data;
free(ep->entry);
free(ep->sentry);
ep->entry = nil;
ep->sentry = nil;
}
void plinitentry(Panel *v, int flags, int wid, char *str, void (*hit)(Panel *, char *)){
Entry *ep;
ep=v->data;
v->flags=flags|LEAF;
v->state=UP;
v->draw=pl_drawentry;
v->hit=pl_hitentry;
v->type=pl_typeentry;
v->getsize=pl_getsizeentry;
v->childspace=pl_childspaceentry;
ep->minsize=Pt(wid, font->height);
v->free=pl_freeentry;
v->snarf=pl_snarfentry;
v->paste=pl_pasteentry;
ep->a = ep->b = 0;
ep->n = str ? utflen(str) : 0;
ep->sz = ep->n + 100;
ep->entry=pl_erealloc(ep->entry, (ep->sz+SLACK)*sizeof(Rune));
runesnprint(ep->entry, ep->sz, "%s", str ? str : "");
ep->hit=hit;
v->kind="entry";
}
Panel *plentry(Panel *parent, int flags, int wid, char *str, void (*hit)(Panel *, char *)){
Panel *v;
v=pl_newpanel(parent, sizeof(Entry));
plinitentry(v, flags, wid, str, hit);
return v;
}
char *plentryval(Panel *p){
Entry *ep;
ep=p->data;
free(ep->sentry);
ep->sentry = smprint("%S", ep->entry);
return ep->sentry;
}