ref: a573d608ce237a853699162955a6ed18999d370b
dir: /entry.c/
#include <u.h>
#include <libc.h>
#include <draw.h>
#include <mouse.h>
#include <keyboard.h>
#include <thread.h>
#include <ctype.h>
#include <bio.h>
#include "a.h"
enum
{
Senabled = 1 << 0,
Sfocused = 1 << 1,
};
enum
{
Padding = 4,
};
static void einsert(Entry *entry, char *s);
static void edelete(Entry *entry, int bs);
static char *menu2str[] =
{
"cut",
"paste",
"snarf",
0
};
enum
{
Mcut,
Mpaste,
Msnarf,
};
static Menu menu2 = { menu2str };
static Image *tick = nil;
int
min(int x, int y)
{
return x <= y ? x : y;
}
int
max(int x, int y)
{
return x >= y ? x : y;
}
static Image*
createtick(Image *bg, Image *fg)
{
enum { Tickw = 3 };
Image *t;
t = allocimage(display, Rect(0, 0, Tickw, font->height), screen->chan, 0, DWhite);
if(t == nil)
return 0;
/* background color */
draw(t, t->r, bg, nil, ZP);
/* vertical line */
draw(t, Rect(Tickw/2, 0, Tickw/2+1, font->height), fg, nil, ZP);
/* box on each end */
draw(t, Rect(0, 0, Tickw, Tickw), fg, nil, ZP);
draw(t, Rect(0, font->height-Tickw, Tickw, font->height), fg, nil, ZP);
return t;
}
void
entryinit(Entry *e, Cols *cols)
{
if(tick == nil)
tick = createtick(cols->back, cols->text);
e->state = Senabled;
e->buttons = 0;
e->tickx = 0;
e->size = 255;
e->text = emalloc(e->size * sizeof(char));
e->text[0] = 0;
e->p0 = 0;
e->p1 = 0;
e->len = 0;
e->c = chancreate(sizeof(char*), 1);
e->cols = cols;
}
int
entryhasfocus(Entry *e)
{
return (e->state & Sfocused);
}
static void
entryunfocus(Entry *e)
{
if(!entryhasfocus(e))
return;
e->state ^= Sfocused;
e->buttons = 0;
e->p0 = e->len;
e->p1 = e->len;
entryredraw(e);
}
void
entryfocus(Entry *e, int sel)
{
if(entryhasfocus(e))
return;
e->state |= Sfocused;
if(sel){
e->p0 = 0;
e->p1 = e->len;
}
entryredraw(e);
}
void
entrysettext(Entry *e, const char *text)
{
int l;
l = strlen(text);
if(l >= e->size) {
e->size = l;
e->text = erealloc(e->text, e->size * sizeof(char));
}
strncpy(e->text, text, l);
e->text[l] = 0;
e->len = l;
e->p0 = e->len;
e->p1 = e->p0;
e->tickx = stringnwidth(font, e->text, e->len);
}
void
entryresize(Entry *e, Rectangle r)
{
e->r = r;
}
void
entryredraw(Entry *e)
{
Rectangle r, clipr;
Point p;
int y, sels, sele;
clipr = screen->clipr;
replclipr(screen, 0, e->r);
draw(screen, e->r, e->cols->back, nil, ZP);
if(entryhasfocus(e))
border(screen, e->r, 1, e->cols->focus, ZP);
else
border(screen, e->r, 1, e->cols->text, ZP);
y = (Dy(e->r) - font->height) / 2;
p = Pt(e->r.min.x + Padding, e->r.min.y + y);
stringn(screen, p, e->cols->text, ZP, font, e->text, e->len);
if (e->p0 != e->p1) {
sels = min(e->p0, e->p1);
sele = max(e->p0, e->p1);
p.x += stringnwidth(font, e->text, sels);
stringnbg(screen, p, e->cols->text, ZP, font, e->text+sels, sele-sels, e->cols->sel, ZP);
} else if (e->state & Sfocused) {
e->tickx = stringnwidth(font, e->text, e->p0);
p.x += e->tickx;
r = Rect(p.x, p.y, p.x + Dx(tick->r), p.y + Dy(tick->r));
draw(screen, r, tick, nil, ZP);
}
flushimage(display, 1);
replclipr(screen, 0, clipr);
}
static int
ptpos(Entry *e, Mouse m)
{
int i, x, prev, cur;
x = m.xy.x - e->r.min.x - Padding;
prev = 0;
for(i = 0; i < e->len; i++){
cur = stringnwidth(font, e->text, i);
if ((prev+cur)/2 >= x){
i--;
break;
}else if (prev <= x && cur >= x)
break;
prev = cur;
}
return i;
}
static int
issep(char c)
{
return c == 0 || c == '/' || (!isalnum(c) && c != '-');
}
static void
entryclicksel(Entry *e)
{
int s, t;
if(e->p0 == 0)
e->p1 = e->len;
else if(e->p0 == e->len)
e->p0 = 0;
else{
s = e->p0;
t = e->p0;
while((s - 1) >= 0 && !issep(e->text[s - 1]))
--s;
while(t < e->len && !issep(e->text[t]))
++t;
e->p0 = s;
e->p1 = t;
}
}
int
entrymouse(Entry *e, Mouse m)
{
static int lastn = -1;
static ulong lastms = 0;
int in, n, sels, sele;
char *s;
usize len;
s = nil;
len = 0;
in = ptinrect(m.xy, e->r);
if(in && !e->buttons && m.buttons)
e->state |= Sfocused;
if(e->state & Sfocused){
n = ptpos(e, m);
if(!in && !e->buttons && m.buttons){
entryunfocus(e);
return -1;
}
if(m.buttons & 1){ /* holding left button */
sels = min(e->p0, e->p1);
sele = max(e->p0, e->p1);
if(m.buttons == (1|2) && e->buttons == 1){
if(sels != sele){
/* TODO: snarf */
edelete(e, 0);
}
}else if(m.buttons == (1|4) && e->buttons == 1){
/* TODO: paste */
//plan9_paste(&s, &len);
if(len > 0 && s != nil)
einsert(e, s);
free(s);
}else if(m.buttons == 1 && e->buttons <= 1){
e->p0 = n;
if (e->buttons == 0){
e->p1 = n;
if(n == lastn && lastms > 0 && (m.msec - lastms)<=250)
entryclicksel(e);
}
}
entryredraw(e);
lastn = n;
lastms = m.msec;
} else if (m.buttons & 2) {
//sels = min(e->p0, e->p1);
//sele = max(e->p0, e->p1);
/* TODO
//n = emenuhit(2, &e.mouse, &menu2);
n = -1;
switch(n) {
case Mcut:
if (sels != sele) {
plan9_snarf(entry->text+sels, sele-sels);
text_delete(entry, 0);
}
break;
case Mpaste:
plan9_paste(&s, &len);
if (len >= 0 && s != NULL)
text_insert(entry, s);
free(s);
break;
case Msnarf:
if (sels != sele) {
plan9_snarf(entry->text+sels, sele-sels);
}
break;
}
entryredraw(e);
*/
}
e->buttons = m.buttons;
return 0;
}
return -1;
}
void
entrykey(Entry *e, Rune k)
{
int sels, sele, n;
char s[UTFmax+1];
if(!entryhasfocus(e))
return;
sels = min(e->p0, e->p1);
sele = max(e->p0, e->p1);
switch (k) {
case Keof:
case '\n':
e->p0 = e->p1 = e->len;
nbsendp(e->c, strdup(e->text));
break;
case Knack: /* ^U: delete selection, if any, and everything before that */
memmove(e->text, e->text + sele, e->len - sele);
e->len = e->len - sele;
e->p0 = 0;
e->text[e->len] = 0;
break;
case Kleft:
e->p0 = max(0, sels-1);
break;
case Kright:
e->p0 = min(e->len, sele+1);
break;
case Ksoh: /* ^A: start of line */
case Khome:
e->p0 = 0;
break;
case Kenq: /* ^E: end of line */
case Kend:
e->p0 = e->len;
break;
case Kdel:
edelete(e, 0);
break;
case Kbs:
edelete(e, 1);
break;
case Ketb:
while(sels > 0 && !isalnum(e->text[sels-1]))
sels--;
while(sels > 0 && isalnum(e->text[sels-1]))
sels--;
e->p0 = sels;
e->p1 = sele;
edelete(e, 0);
break;
case Kesc:
if (sels == sele) {
sels = e->p0 = 0;
sele = e->p1 = e->len;
}
/* TODO */
//plan9_snarf(e->text+sels, sele-sels);
edelete(e, 0);
break;
case 0x7: /* ^G: remove focus */
entryunfocus(e);
return;
default:
if(k < 0x20 || (k & 0xFF00) == KF || (k & 0xFF00) == Spec || (n = runetochar(s, &k)) < 1)
return;
s[n] = 0;
einsert(e, s);
}
e->p1 = e->p0;
entryredraw(e);
}
static void
einsert(Entry *e, char *s)
{
int sels, sele, n;
char *p;
n = strlen(s);
if(e->size <= e->len + n){
e->size = (e->len + n)*2 + 1;
if((p = realloc(e->text, e->size)) == nil)
return;
e->text = p;
}
sels = min(e->p0, e->p1);
sele = max(e->p0, e->p1);
if(sels != sele){
memmove(e->text + sels + n, e->text + sele, e->len - sele);
e->len -= sele - sels;
e->p0 = sels;
}else if (e->p0 != e->len)
memmove(e->text + e->p0 + n, e->text + e->p0, e->len - e->p0);
memmove(e->text + sels, s, n);
e->len += n;
e->p1 = sels;
e->p0 = sels + n;
e->text[e->len] = 0;
}
static void
edelete(Entry *e, int bs)
{
int sels, sele;
sels = min(e->p0, e->p1);
sele = max(e->p0, e->p1);
if(sels == sele && sels == 0)
return;
memmove(e->text + sels - bs, e->text + sele, e->len - sele);
e->p0 = sels - bs;
e->len -= sele - sels + bs;
e->p1 = e->p0;
e->text[e->len] = 0;
}