1 #include <u.h>
2 #include <libc.h>
3 #include <draw.h>
4 #include <thread.h>
5 #include <mouse.h>
6 #include <frame.h>
7
8 int
_frcanfit(Frame * f,Point pt,Frbox * b)9 _frcanfit(Frame *f, Point pt, Frbox *b)
10 {
11 int left, w, nr;
12 uchar *p;
13 Rune r;
14
15 left = f->r.max.x-pt.x;
16 if(b->nrune < 0)
17 return b->minwid <= left;
18 if(left >= b->wid)
19 return b->nrune;
20 for(nr=0,p=b->ptr; *p; p+=w,nr++){
21 r = *p;
22 if(r < Runeself)
23 w = 1;
24 else
25 w = chartorune(&r, (char*)p);
26 left -= stringnwidth(f->font, (char*)p, 1);
27 if(left < 0)
28 return nr;
29 }
30 drawerror(f->display, "_frcanfit can't");
31 return 0;
32 }
33
34 void
_frcklinewrap(Frame * f,Point * p,Frbox * b)35 _frcklinewrap(Frame *f, Point *p, Frbox *b)
36 {
37 if((b->nrune<0? b->minwid : b->wid) > f->r.max.x-p->x){
38 p->x = f->r.min.x;
39 p->y += f->font->height;
40 }
41 }
42
43 void
_frcklinewrap0(Frame * f,Point * p,Frbox * b)44 _frcklinewrap0(Frame *f, Point *p, Frbox *b)
45 {
46 if(_frcanfit(f, *p, b) == 0){
47 p->x = f->r.min.x;
48 p->y += f->font->height;
49 }
50 }
51
52 void
_fradvance(Frame * f,Point * p,Frbox * b)53 _fradvance(Frame *f, Point *p, Frbox *b)
54 {
55 if(b->nrune<0 && b->bc=='\n'){
56 p->x = f->r.min.x;
57 p->y += f->font->height;
58 }else
59 p->x += b->wid;
60 }
61
62 int
_frnewwid(Frame * f,Point pt,Frbox * b)63 _frnewwid(Frame *f, Point pt, Frbox *b)
64 {
65 b->wid = _frnewwid0(f, pt, b);
66 return b->wid;
67 }
68
69 int
_frnewwid0(Frame * f,Point pt,Frbox * b)70 _frnewwid0(Frame *f, Point pt, Frbox *b)
71 {
72 int c, x;
73
74 c = f->r.max.x;
75 x = pt.x;
76 if(b->nrune>=0 || b->bc!='\t')
77 return b->wid;
78 if(x+b->minwid > c)
79 x = pt.x = f->r.min.x;
80 x += f->maxtab;
81 x -= (x-f->r.min.x)%f->maxtab;
82 if(x-pt.x<b->minwid || x>c)
83 x = pt.x+b->minwid;
84 return x-pt.x;
85 }
86
87 void
_frclean(Frame * f,Point pt,int n0,int n1)88 _frclean(Frame *f, Point pt, int n0, int n1) /* look for mergeable boxes */
89 {
90 Frbox *b;
91 int nb, c;
92
93 c = f->r.max.x;
94 for(nb=n0; nb<n1-1; nb++){
95 b = &f->box[nb];
96 _frcklinewrap(f, &pt, b);
97 while(b[0].nrune>=0 && nb<n1-1 && b[1].nrune>=0 && pt.x+b[0].wid+b[1].wid<c){
98 _frmergebox(f, nb);
99 n1--;
100 b = &f->box[nb];
101 }
102 _fradvance(f, &pt, &f->box[nb]);
103 }
104 for(; nb<f->nbox; nb++){
105 b = &f->box[nb];
106 _frcklinewrap(f, &pt, b);
107 _fradvance(f, &pt, &f->box[nb]);
108 }
109 f->lastlinefull = 0;
110 if(pt.y >= f->r.max.y)
111 f->lastlinefull = 1;
112 }
113