ref: b7da224d109d1f4580e3e66d8c945180495e3316
dir: /sys/src/libframe/frdraw.c/
#include <u.h> #include <libc.h> #include <draw.h> #include <thread.h> #include <mouse.h> #include <frame.h> void _frdrawtext(Frame *f, Point pt, Image *text, Image *back) { Frbox *b; int nb; for(nb=0,b=f->box; nb<f->nbox; nb++, b++){ _frcklinewrap(f, &pt, b); if(b->nrune >= 0){ stringbg(f->b, pt, text, ZP, f->font, (char*)b->ptr, back, ZP); } pt.x += b->wid; } } static int nbytes(char *s0, int nr) { char *s; Rune r; s = s0; while(--nr >= 0) s += chartorune(&r, s); return s-s0; } void frdrawsel(Frame *f, Point pt, ulong p0, ulong p1, int issel) { Image *back, *text; if(f->ticked) frtick(f, frptofchar(f, f->p0), 0); if(p0 == p1){ frtick(f, pt, issel); return; } if(issel){ back = f->cols[HIGH]; text = f->cols[HTEXT]; }else{ back = f->cols[BACK]; text = f->cols[TEXT]; } frdrawsel0(f, pt, p0, p1, back, text); } Point frdrawsel0(Frame *f, Point pt, ulong p0, ulong p1, Image *back, Image *text) { Frbox *b; int nb, nr, w, x, trim; Point qt; uint p; char *ptr; p = 0; b = f->box; trim = 0; for(nb=0; nb<f->nbox && p<p1; nb++){ nr = b->nrune; if(nr < 0) nr = 1; if(p+nr <= p0) goto Continue; if(p >= p0){ qt = pt; _frcklinewrap(f, &pt, b); /* fill in the end of a wrapped line */ if(pt.y > qt.y) draw(f->b, Rect(qt.x, qt.y, f->r.max.x, pt.y), back, nil, qt); } ptr = (char*)b->ptr; if(p < p0){ /* beginning of region: advance into box */ ptr += nbytes(ptr, p0-p); nr -= (p0-p); p = p0; } trim = 0; if(p+nr > p1){ /* end of region: trim box */ nr -= (p+nr)-p1; trim = 1; } if(b->nrune<0 || nr==b->nrune) w = b->wid; else w = stringnwidth(f->font, ptr, nr); x = pt.x+w; if(x > f->r.max.x) x = f->r.max.x; draw(f->b, Rect(pt.x, pt.y, x, pt.y+f->font->height), back, nil, pt); if(b->nrune >= 0) stringnbg(f->b, pt, text, ZP, f->font, ptr, nr, back, ZP); pt.x += w; Continue: b++; p += nr; } /* if this is end of last plain text box on wrapped line, fill to end of line */ if(p1>p0 && b>f->box && b<f->box+f->nbox && b[-1].nrune>0 && !trim){ qt = pt; _frcklinewrap(f, &pt, b); if(pt.y > qt.y) draw(f->b, Rect(qt.x, qt.y, f->r.max.x, pt.y), back, nil, qt); } return pt; } void frredraw(Frame *f) { int ticked; Point pt; if(f->p0 == f->p1){ ticked = f->ticked; if(ticked) frtick(f, frptofchar(f, f->p0), 0); frdrawsel0(f, frptofchar(f, 0), 0, f->nchars, f->cols[BACK], f->cols[TEXT]); if(ticked) frtick(f, frptofchar(f, f->p0), 1); return; } pt = frptofchar(f, 0); pt = frdrawsel0(f, pt, 0, f->p0, f->cols[BACK], f->cols[TEXT]); pt = frdrawsel0(f, pt, f->p0, f->p1, f->cols[HIGH], f->cols[HTEXT]); pt = frdrawsel0(f, pt, f->p1, f->nchars, f->cols[BACK], f->cols[TEXT]); } void frtick(Frame *f, Point pt, int ticked) { Rectangle r; if(f->ticked==ticked || f->tick==nil || !ptinrect(pt, f->r)) return; pt.x--; /* looks best just left of where requested */ r = Rect(pt.x, pt.y, pt.x+FRTICKW, pt.y+f->font->height); /* can go into left border but not right */ if(r.max.x > f->r.max.x) r.max.x = f->r.max.x; if(ticked){ draw(f->tickback, f->tickback->r, f->b, nil, pt); draw(f->b, r, f->tick, nil, ZP); }else draw(f->b, r, f->tickback, nil, ZP); f->ticked = ticked; } Point _frdraw(Frame *f, Point pt) { Frbox *b; int nb, n; for(b=f->box,nb=0; nb<f->nbox; nb++, b++){ _frcklinewrap0(f, &pt, b); if(pt.y == f->r.max.y){ f->nchars -= _frstrlen(f, nb); _frdelbox(f, nb, f->nbox-1); break; } if(b->nrune > 0){ n = _frcanfit(f, pt, b); if(n == 0) drawerror(f->display, "_frcanfit==0"); if(n != b->nrune){ _frsplitbox(f, nb, n); b = &f->box[nb]; } pt.x += b->wid; }else{ if(b->bc == '\n'){ pt.x = f->r.min.x; pt.y+=f->font->height; }else pt.x += _frnewwid(f, pt, b); } } return pt; } int _frstrlen(Frame *f, int nb) { int n; for(n=0; nb<f->nbox; nb++) n += NRUNE(&f->box[nb]); return n; }