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- #include <u.h>
- #include <libc.h>
- #include <draw.h>
- #include <thread.h>
- #include <mouse.h>
- #include <frame.h>
- int
- _frcanfit(Frame *f, Point pt, Frbox *b)
- {
- int left, w, nr;
- uchar *p;
- Rune r;
- left = f->r.max.x-pt.x;
- if(b->nrune < 0)
- return b->minwid <= left;
- if(left >= b->wid)
- return b->nrune;
- for(nr=0,p=b->ptr; *p; p+=w,nr++){
- r = *p;
- if(r < Runeself)
- w = 1;
- else
- w = chartorune(&r, (char*)p);
- left -= stringnwidth(f->font, (char*)p, 1);
- if(left < 0)
- return nr;
- }
- drawerror(f->display, "_frcanfit can't");
- return 0;
- }
- void
- _frcklinewrap(Frame *f, Point *p, Frbox *b)
- {
- if((b->nrune<0? b->minwid : b->wid) > f->r.max.x-p->x){
- p->x = f->r.min.x;
- p->y += f->font->height;
- }
- }
- void
- _frcklinewrap0(Frame *f, Point *p, Frbox *b)
- {
- if(_frcanfit(f, *p, b) == 0){
- p->x = f->r.min.x;
- p->y += f->font->height;
- }
- }
- void
- _fradvance(Frame *f, Point *p, Frbox *b)
- {
- if(b->nrune<0 && b->bc=='\n'){
- p->x = f->r.min.x;
- p->y += f->font->height;
- }else
- p->x += b->wid;
- }
- int
- _frnewwid(Frame *f, Point pt, Frbox *b)
- {
- b->wid = _frnewwid0(f, pt, b);
- return b->wid;
- }
- int
- _frnewwid0(Frame *f, Point pt, Frbox *b)
- {
- int c, x;
- c = f->r.max.x;
- x = pt.x;
- if(b->nrune>=0 || b->bc!='\t')
- return b->wid;
- if(x+b->minwid > c)
- x = pt.x = f->r.min.x;
- x += f->maxtab;
- x -= (x-f->r.min.x)%f->maxtab;
- if(x-pt.x<b->minwid || x>c)
- x = pt.x+b->minwid;
- return x-pt.x;
- }
- void
- _frclean(Frame *f, Point pt, int n0, int n1) /* look for mergeable boxes */
- {
- Frbox *b;
- int nb, c;
- c = f->r.max.x;
- for(nb=n0; nb<n1-1; nb++){
- b = &f->box[nb];
- _frcklinewrap(f, &pt, b);
- while(b[0].nrune>=0 && nb<n1-1 && b[1].nrune>=0 && pt.x+b[0].wid+b[1].wid<c){
- _frmergebox(f, nb);
- n1--;
- b = &f->box[nb];
- }
- _fradvance(f, &pt, &f->box[nb]);
- }
- for(; nb<f->nbox; nb++){
- b = &f->box[nb];
- _frcklinewrap(f, &pt, b);
- _fradvance(f, &pt, &f->box[nb]);
- }
- f->lastlinefull = 0;
- if(pt.y >= f->r.max.y)
- f->lastlinefull = 1;
- }
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