ref: c3a430e6824a8f1f08f28a8df24b4b64266b06f9
dir: /sys/src/libcontrol/entry.c/
#include <u.h>
#include <libc.h>
#include <draw.h>
#include <thread.h>
#include <mouse.h>
#include <keyboard.h>
#include <control.h>
typedef struct Entry Entry;
struct Entry
{
Control;
int border;
CFont *font;
CImage *image;
CImage *textcolor;
CImage *bordercolor;
Rune *text;
int ntext;
int cursor;
int align;
int hasfocus;
int lastbut;
};
enum{
EAlign,
EBorder,
EBordercolor,
EData,
EFocus,
EFont,
EFormat,
EHide,
EImage,
ERect,
EReveal,
EShow,
ESize,
ETextcolor,
EValue,
};
static char *cmds[] = {
[EAlign] = "align",
[EBorder] = "border",
[EBordercolor] = "bordercolor",
[EData] = "data",
[EFocus] = "focus",
[EFont] = "font",
[EFormat] = "format",
[EHide] = "hide",
[EImage] = "image",
[ERect] = "rect",
[EReveal] = "reveal",
[EShow] = "show",
[ESize] = "size",
[ETextcolor] = "textcolor",
[EValue] = "value",
nil
};
static void
entryfree(Control *c)
{
Entry *e;
e = (Entry *)c;
_putctlfont(e->font);
_putctlimage(e->image);
_putctlimage(e->textcolor);
_putctlimage(e->bordercolor);
free(e->text);
}
static Point
entrypoint(Entry *e, int c)
{
Point p;
Rectangle r;
r = e->rect;
if(e->border > 0)
r = insetrect(r, e->border);
p = _ctlalignpoint(r,
runestringnwidth(e->font->font, e->text, e->ntext),
e->font->font->height, e->align);
if(c > e->ntext)
c = e->ntext;
p.x += runestringnwidth(e->font->font, e->text, c);
return p;
}
static void
entryshow(Entry *e)
{
Rectangle r, dr;
Point p;
if (e->hidden)
return;
r = e->rect;
draw(e->screen, r, e->image->image, nil, e->image->image->r.min);
if(e->border > 0){
border(e->screen, r, e->border, e->bordercolor->image, e->bordercolor->image->r.min);
dr = insetrect(r, e->border);
}else
dr = r;
p = entrypoint(e, 0);
_string(e->screen, p, e->textcolor->image,
ZP, e->font->font, nil, e->text, e->ntext,
dr, nil, ZP, SoverD);
if(e->hasfocus){
p = entrypoint(e, e->cursor);
r.min = p;
r.max.x = p.x+1;
r.max.y = p.y+e->font->font->height;
if(rectclip(&r, dr))
draw(e->screen, r, e->textcolor->image, nil, ZP);
}
flushimage(display, 1);
}
static void
entrysetpoint(Entry *e, Point cp)
{
Point p;
int i;
if(!ptinrect(cp, insetrect(e->rect, e->border)))
return;
p = entrypoint(e, 0);
for(i=0; i<e->ntext; i++){
p.x += runestringnwidth(e->font->font, e->text+i, 1);
if(p.x > cp.x)
break;
}
e->cursor = i;
entryshow(e);
}
static void
entrycut(Entry *e)
{
_ctlputsnarf(e->text);
e->cursor = 0;
e->ntext = 0;
e->text[0] = L'\0';
}
static void
entrypaste(Entry *e)
{
Rune *s;
int n;
s = _ctlgetsnarf();
if(s == nil)
return;
n = runestrlen(s);
e->text = ctlrealloc(e->text, (e->ntext+n+1)*sizeof(Rune));
memmove(e->text+e->cursor+n, e->text+e->cursor,
(e->ntext+1-e->cursor)*sizeof(Rune));
memmove(e->text+e->cursor, s, n*sizeof(Rune));
e->cursor += n;
e->ntext += n;
}
static void
entrymouse(Control *c, Mouse *m)
{
Entry *e;
e = (Entry*)c;
if(m->buttons==1 && e->lastbut==0){
entrysetpoint(e, m->xy);
} else if(m->buttons==3 && e->lastbut!=3){
entrycut(e);
entryshow(e);
} else if(m->buttons==5 && e->lastbut!=5){
entrypaste(e);
entryshow(e);
}
e->lastbut = m->buttons;
}
static void
entryctl(Control *c, CParse *cp)
{
int cmd;
Rectangle r;
Entry *e;
Rune *rp;
e = (Entry*)c;
cmd = _ctllookup(cp->args[0], cmds, nelem(cmds));
switch(cmd){
default:
ctlerror("%q: unrecognized message '%s'", e->name, cp->str);
break;
case EAlign:
_ctlargcount(e, cp, 2);
e->align = _ctlalignment(cp->args[1]);
break;
case EBorder:
_ctlargcount(e, cp, 2);
if(cp->iargs[1] < 0)
ctlerror("%q: bad border: %c", e->name, cp->str);
e->border = cp->iargs[1];
break;
case EBordercolor:
_ctlargcount(e, cp, 2);
_setctlimage(e, &e->bordercolor, cp->args[1]);
break;
case EData:
_ctlargcount(e, cp, 1);
chanprint(e->data, "%S", e->text);
break;
case EFocus:
_ctlargcount(e, cp, 2);
e->hasfocus = cp->iargs[1];
e->lastbut = 0;
entryshow(e);
break;
case EFont:
_ctlargcount(e, cp, 2);
_setctlfont(e, &e->font, cp->args[1]);
break;
case EFormat:
_ctlargcount(e, cp, 2);
e->format = ctlstrdup(cp->args[1]);
break;
case EHide:
_ctlargcount(e, cp, 1);
e->hidden = 1;
break;
case EImage:
_ctlargcount(e, cp, 2);
_setctlimage(e, &e->image, cp->args[1]);
break;
case ERect:
_ctlargcount(e, cp, 5);
r.min.x = cp->iargs[1];
r.min.y = cp->iargs[2];
r.max.x = cp->iargs[3];
r.max.y = cp->iargs[4];
if(Dx(r)<=0 || Dy(r)<=0)
ctlerror("%q: bad rectangle: %s", e->name, cp->str);
e->rect = r;
break;
case EReveal:
_ctlargcount(e, cp, 1);
e->hidden = 0;
entryshow(e);
break;
case EShow:
_ctlargcount(e, cp, 1);
entryshow(e);
break;
case ESize:
if (cp->nargs == 3)
r.max = Pt(0x7fffffff, 0x7fffffff);
else{
_ctlargcount(e, cp, 5);
r.max.x = cp->iargs[3];
r.max.y = cp->iargs[4];
}
r.min.x = cp->iargs[1];
r.min.y = cp->iargs[2];
if(r.min.x<=0 || r.min.y<=0 || r.max.x<=0 || r.max.y<=0 || r.max.x < r.min.x || r.max.y < r.min.y)
ctlerror("%q: bad sizes: %s", e->name, cp->str);
e->size.min = r.min;
e->size.max = r.max;
break;
case ETextcolor:
_ctlargcount(e, cp, 2);
_setctlimage(e, &e->textcolor, cp->args[1]);
break;
case EValue:
_ctlargcount(e, cp, 2);
rp = _ctlrunestr(cp->args[1]);
if(runestrcmp(rp, e->text) != 0){
free(e->text);
e->text = rp;
e->ntext = runestrlen(e->text);
e->cursor = e->ntext;
entryshow(e);
}else
free(rp);
break;
}
}
static void
entrykey(Entry *e, Rune r)
{
char *p;
switch(r){
default:
e->text = ctlrealloc(e->text, (e->ntext+1+1)*sizeof(Rune));
memmove(e->text+e->cursor+1, e->text+e->cursor,
(e->ntext+1-e->cursor)*sizeof(Rune));
e->text[e->cursor++] = r;
e->ntext++;
break;
case L'\n': /* newline: return value */
p = _ctlstrrune(e->text);
chanprint(e->event, e->format, e->name, p);
free(p);
return;
case L'\b':
if(e->cursor > 0){
memmove(e->text+e->cursor-1, e->text+e->cursor,
(e->ntext+1-e->cursor)*sizeof(Rune));
e->cursor--;
e->ntext--;
}
break;
case Kright:
if(e->cursor < e->ntext)
e->cursor++;
break;
case Kleft:
if(e->cursor > 0)
e->cursor--;
break;
case 0x01: /* control A: beginning of line */
e->cursor = 0;
break;
case 0x05: /* control E: end of line */
e->cursor = e->ntext;
break;
case 0x15: /* control U: kill line */
e->cursor = 0;
e->ntext = 0;
break;
case 0x16: /* control V: paste (append snarf buffer) */
entrypaste(e);
break;
}
e->text[e->ntext] = L'\0';
}
static void
entrykeys(Control *c, Rune *rp)
{
Entry *e;
int i;
e = (Entry *)c;
for(i=0; rp[i]!=L'\0'; i++)
entrykey(e, rp[i]);
entryshow(e);
}
Control*
createentry(Controlset *cs, char *name)
{
Entry *e;
e = (Entry*) _createctl(cs, "entry", sizeof(Entry), name);
e->text = ctlmalloc(sizeof(Rune));
e->ntext = 0;
e->image = _getctlimage("white");
e->textcolor = _getctlimage("black");
e->bordercolor = _getctlimage("black");
e->font = _getctlfont("font");
e->format = ctlstrdup("%q: value %q");
e->border = 0;
e->ctl = entryctl;
e->mouse = entrymouse;
e->key = entrykeys;
e->exit = entryfree;
return (Control *)e;
}