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