ref: d5e2fd9028687dfc18c0ac1b249ccec38ab075f6
dir: /sys/src/cmd/samterm/flayer.c/
#include <u.h>
#include <libc.h>
#include <draw.h>
#include <thread.h>
#include <mouse.h>
#include <keyboard.h>
#include <frame.h>
#include "flayer.h"
#include "samterm.h"
#define DELTA 10
static Flayer **llist; /* front to back */
static int nllist;
static int nlalloc;
static Rectangle lDrect;
Vis visibility(Flayer *);
void newvisibilities(int);
void llinsert(Flayer*);
void lldelete(Flayer*);
Image *maincols[NCOL];
Image *cmdcols[NCOL];
void
flstart(Rectangle r)
{
lDrect = r;
/* Main text is yellowish */
maincols[BACK] = allocimagemix(display, DPaleyellow, DWhite);
maincols[HIGH] = allocimage(display, Rect(0,0,1,1), screen->chan, 1, DDarkyellow);
maincols[BORD] = allocimage(display, Rect(0,0,2,2), screen->chan, 1, DYellowgreen);
maincols[TEXT] = display->black;
maincols[HTEXT] = display->black;
/* Command text is blueish */
cmdcols[BACK] = allocimagemix(display, DPalebluegreen, DWhite);
cmdcols[HIGH] = allocimage(display, Rect(0,0,1,1), screen->chan, 1, DPalegreygreen);
cmdcols[BORD] = allocimage(display, Rect(0,0,2,2), screen->chan, 1, DPurpleblue);
cmdcols[TEXT] = display->black;
cmdcols[HTEXT] = display->black;
}
void
flnew(Flayer *l, Rune *(*fn)(Flayer*, long, ulong*), int u0, void *u1)
{
if(nllist == nlalloc){
nlalloc += DELTA;
llist = realloc(llist, nlalloc*sizeof(Flayer**));
if(llist == 0)
panic("flnew");
}
l->textfn = fn;
l->user0 = u0;
l->user1 = u1;
l->lastsr = ZR;
llinsert(l);
}
Rectangle
flrect(Flayer *l, Rectangle r)
{
rectclip(&r, lDrect);
l->entire = r;
l->scroll = insetrect(r, FLMARGIN);
r.min.x =
l->scroll.max.x = r.min.x+FLMARGIN+FLSCROLLWID+(FLGAP-FLMARGIN);
return r;
}
void
flinit(Flayer *l, Rectangle r, Font *ft, Image **cols)
{
lldelete(l);
llinsert(l);
l->visible = All;
l->origin = l->p0 = l->p1 = 0;
frinit(&l->f, insetrect(flrect(l, r), FLMARGIN), ft, screen, cols);
l->f.maxtab = maxtab*stringwidth(ft, "0");
newvisibilities(1);
draw(screen, l->entire, l->f.cols[BACK], nil, ZP);
scrdraw(l, 0L);
flborder(l, 0);
}
void
flclose(Flayer *l)
{
if(l->visible == All)
draw(screen, l->entire, display->white, nil, ZP);
else if(l->visible == Some){
if(l->f.b == 0)
l->f.b = allocimage(display, l->entire, screen->chan, 0, DNofill);
if(l->f.b){
draw(l->f.b, l->entire, display->white, nil, ZP);
flrefresh(l, l->entire, 0);
}
}
frclear(&l->f, 1);
lldelete(l);
if(l->f.b && l->visible!=All)
freeimage(l->f.b);
l->textfn = 0;
newvisibilities(1);
}
void
flborder(Flayer *l, int wide)
{
if(flprepare(l)){
border(l->f.b, l->entire, FLMARGIN, l->f.cols[BACK], ZP);
border(l->f.b, l->entire, wide? FLMARGIN : 1, l->f.cols[BORD], ZP);
if(l->visible==Some)
flrefresh(l, l->entire, 0);
}
}
Flayer *
flwhich(Point p)
{
int i;
if(p.x==0 && p.y==0)
return nllist? llist[0] : 0;
for(i=0; i<nllist; i++)
if(ptinrect(p, llist[i]->entire))
return llist[i];
return 0;
}
void
flupfront(Flayer *l)
{
int v = l->visible;
lldelete(l);
llinsert(l);
if(v!=All)
newvisibilities(0);
}
void
newvisibilities(int redraw)
/* if redraw false, we know it's a flupfront, and needn't
* redraw anyone becoming partially covered */
{
int i;
Vis ov;
Flayer *l;
for(i = 0; i<nllist; i++){
l = llist[i];
l->lastsr = ZR; /* make sure scroll bar gets redrawn */
ov = l->visible;
l->visible = visibility(l);
#define V(a, b) (((a)<<2)|((b)))
switch(V(ov, l->visible)){
case V(Some, None):
if(l->f.b)
freeimage(l->f.b);
case V(All, None):
case V(All, Some):
l->f.b = 0;
frclear(&l->f, 0);
break;
case V(Some, Some):
if(l->f.b==0 && redraw)
case V(None, Some):
flprepare(l);
if(l->f.b && redraw){
flrefresh(l, l->entire, 0);
freeimage(l->f.b);
l->f.b = 0;
frclear(&l->f, 0);
}
case V(None, None):
case V(All, All):
break;
case V(Some, All):
if(l->f.b){
draw(screen, l->entire, l->f.b, nil, l->entire.min);
freeimage(l->f.b);
l->f.b = screen;
break;
}
case V(None, All):
flprepare(l);
break;
}
if(ov==None && l->visible!=None)
flnewlyvisible(l);
}
}
void
llinsert(Flayer *l)
{
int i;
for(i=nllist; i>0; --i)
llist[i]=llist[i-1];
llist[0]=l;
nllist++;
}
void
lldelete(Flayer *l)
{
int i;
for(i=0; i<nllist; i++)
if(llist[i]==l){
--nllist;
for(; i<nllist; i++)
llist[i] = llist[i+1];
return;
}
panic("lldelete");
}
void
flinsert(Flayer *l, Rune *sp, Rune *ep, long p0)
{
if(flprepare(l)){
frinsert(&l->f, sp, ep, p0-l->origin);
scrdraw(l, scrtotal(l));
if(l->visible==Some)
flrefresh(l, l->entire, 0);
}
}
void
fldelete(Flayer *l, long p0, long p1)
{
if(flprepare(l)){
p0 -= l->origin;
if(p0 < 0)
p0 = 0;
p1 -= l->origin;
if(p1<0)
p1 = 0;
frdelete(&l->f, p0, p1);
scrdraw(l, scrtotal(l));
if(l->visible==Some)
flrefresh(l, l->entire, 0);
}
}
int
flselect(Flayer *l, ulong *p)
{
static int clickcount;
static Point clickpt = {-10, -10};
int dt, dx, dy;
if(l->visible!=All)
flupfront(l);
dt = mousep->msec - l->click;
dx = abs(mousep->xy.x - clickpt.x);
dy = abs(mousep->xy.y - clickpt.y);
*p = frcharofpt(&l->f, mousep->xy) + l->origin;
l->click = mousep->msec;
clickpt = mousep->xy;
if(dx < 3 && dy < 3 && dt < Clicktime && clickcount < 3)
return ++clickcount;
clickcount = 0;
frselect(&l->f, mousectl);
l->p0 = l->f.p0+l->origin;
l->p1 = l->f.p1+l->origin;
return 0;
}
void
flsetselect(Flayer *l, long p0, long p1)
{
ulong fp0, fp1;
if(l->visible==None || !flprepare(l)){
l->p0 = p0, l->p1 = p1;
return;
}
l->p0 = p0, l->p1 = p1;
flfp0p1(l, &fp0, &fp1);
if(fp0==l->f.p0 && fp1==l->f.p1)
return;
if(fp1<=l->f.p0 || fp0>=l->f.p1 || l->f.p0==l->f.p1 || fp0==fp1){
/* no overlap or trivial repainting */
frdrawsel(&l->f, frptofchar(&l->f, l->f.p0), l->f.p0, l->f.p1, 0);
frdrawsel(&l->f, frptofchar(&l->f, fp0), fp0, fp1, 1);
goto Refresh;
}
/* the current selection and the desired selection overlap and are both non-empty */
if(fp0 < l->f.p0){
/* extend selection backwards */
frdrawsel(&l->f, frptofchar(&l->f, fp0), fp0, l->f.p0, 1);
}else if(fp0 > l->f.p0){
/* trim first part of selection */
frdrawsel(&l->f, frptofchar(&l->f, l->f.p0), l->f.p0, fp0, 0);
}
if(fp1 > l->f.p1){
/* extend selection forwards */
frdrawsel(&l->f, frptofchar(&l->f, l->f.p1), l->f.p1, fp1, 1);
}else if(fp1 < l->f.p1){
/* trim last part of selection */
frdrawsel(&l->f, frptofchar(&l->f, fp1), fp1, l->f.p1, 0);
}
Refresh:
l->f.p0 = fp0;
l->f.p1 = fp1;
if(l->visible==Some)
flrefresh(l, l->entire, 0);
}
void
flfp0p1(Flayer *l, ulong *pp0, ulong *pp1)
{
long p0 = l->p0-l->origin, p1 = l->p1-l->origin;
if(p0 < 0)
p0 = 0;
if(p1 < 0)
p1 = 0;
if(p0 > l->f.nchars)
p0 = l->f.nchars;
if(p1 > l->f.nchars)
p1 = l->f.nchars;
*pp0 = p0;
*pp1 = p1;
}
Rectangle
rscale(Rectangle r, Point old, Point new)
{
r.min.x = r.min.x*new.x/old.x;
r.min.y = r.min.y*new.y/old.y;
r.max.x = r.max.x*new.x/old.x;
r.max.y = r.max.y*new.y/old.y;
return r;
}
void
flresize(Rectangle dr)
{
int i;
Flayer *l;
Frame *f;
Rectangle r, olDrect;
int move;
olDrect = lDrect;
lDrect = dr;
move = 0;
/* no moving on rio; must repaint */
if(0 && Dx(dr)==Dx(olDrect) && Dy(dr)==Dy(olDrect))
move = 1;
else
draw(screen, lDrect, display->white, nil, ZP);
for(i=0; i<nllist; i++){
l = llist[i];
l->lastsr = ZR;
f = &l->f;
if(move)
r = rectaddpt(rectsubpt(l->entire, olDrect.min), dr.min);
else{
r = rectaddpt(rscale(rectsubpt(l->entire, olDrect.min),
subpt(olDrect.max, olDrect.min),
subpt(dr.max, dr.min)), dr.min);
if(l->visible==Some && f->b){
freeimage(f->b);
frclear(f, 0);
}
f->b = 0;
if(l->visible!=None)
frclear(f, 0);
}
if(!rectclip(&r, dr))
panic("flresize");
if(r.max.x-r.min.x<100)
r.min.x = dr.min.x;
if(r.max.x-r.min.x<100)
r.max.x = dr.max.x;
if(r.max.y-r.min.y<2*FLMARGIN+f->font->height)
r.min.y = dr.min.y;
if(r.max.y-r.min.y<2*FLMARGIN+f->font->height)
r.max.y = dr.max.y;
if(!move)
l->visible = None;
frsetrects(f, insetrect(flrect(l, r), FLMARGIN), f->b);
if(!move && f->b)
scrdraw(l, scrtotal(l));
}
newvisibilities(1);
}
int
flprepare(Flayer *l)
{
Frame *f;
ulong n;
Rune *r;
if(l->visible == None)
return 0;
f = &l->f;
if(f->b == 0){
if(l->visible == All)
f->b = screen;
else if((f->b = allocimage(display, l->entire, screen->chan, 0, 0))==0)
return 0;
draw(f->b, l->entire, f->cols[BACK], nil, ZP);
border(f->b, l->entire, l==llist[0]? FLMARGIN : 1, f->cols[BORD], ZP);
n = f->nchars;
frinit(f, f->entire, f->font, f->b, 0);
f->maxtab = maxtab*stringwidth(f->font, "0");
r = (*l->textfn)(l, n, &n);
frinsert(f, r, r+n, (ulong)0);
frdrawsel(f, frptofchar(f, f->p0), f->p0, f->p1, 0);
flfp0p1(l, &f->p0, &f->p1);
frdrawsel(f, frptofchar(f, f->p0), f->p0, f->p1, 1);
l->lastsr = ZR;
scrdraw(l, scrtotal(l));
}
return 1;
}
static int somevis, someinvis, justvis;
Vis
visibility(Flayer *l)
{
somevis = someinvis = 0;
justvis = 1;
flrefresh(l, l->entire, 0);
justvis = 0;
if(somevis==0)
return None;
if(someinvis==0)
return All;
return Some;
}
void
flrefresh(Flayer *l, Rectangle r, int i)
{
Flayer *t;
Rectangle s;
Top:
if((t=llist[i++]) == l){
if(!justvis)
draw(screen, r, l->f.b, nil, r.min);
somevis = 1;
}else{
if(!rectXrect(t->entire, r))
goto Top; /* avoid stacking unnecessarily */
if(t->entire.min.x>r.min.x){
s = r;
s.max.x = t->entire.min.x;
flrefresh(l, s, i);
r.min.x = t->entire.min.x;
}
if(t->entire.min.y>r.min.y){
s = r;
s.max.y = t->entire.min.y;
flrefresh(l, s, i);
r.min.y = t->entire.min.y;
}
if(t->entire.max.x<r.max.x){
s = r;
s.min.x = t->entire.max.x;
flrefresh(l, s, i);
r.max.x = t->entire.max.x;
}
if(t->entire.max.y<r.max.y){
s = r;
s.min.y = t->entire.max.y;
flrefresh(l, s, i);
r.max.y = t->entire.max.y;
}
/* remaining piece of r is blocked by t; forget about it */
someinvis = 1;
}
}