1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
/* Copyright (c) 1992 AT&T - All rights reserved. */
#include <u.h>
#include <libc.h>
#include <libg.h>
#include <frame.h>
void
frselect(Frame *f, Mouse *m) /* when called, button 1 is down */
{
ulong p0, p1, q;
Point mp, pt0, pt1, qt;
int b;
b = m->buttons;
mp = m->xy;
Again:
f->modified = 0;
frselectp(f, F&~D);
p0 = p1 = frcharofpt(f, mp);
pt0 = frptofchar(f, p0);
pt1 = frptofchar(f, p1);
frselectf(f, pt0, pt1, F&~D);
do{
if(f->modified) /* special hack so 8½ can frselect in parallel */
goto Again;
q = frcharofpt(f, m->xy);
if(p1 != q){
if(p0 == p1)
frselectf(f, pt0, pt1, F&~D);
qt = frptofchar(f, q);
if(p1 < q)
frselectf(f, pt1, qt, F&~D);
else
frselectf(f, qt, pt1, F&~D);
p1 = q;
pt1 = qt;
if(p0 == p1)
frselectf(f, pt0, pt1, F&~D);
}
f->modified = 0;
if(p0 < p1)
f->p0 = p0, f->p1 = p1;
else
f->p0 = p1, f->p1 = p0;
frgetmouse();
}while(m->buttons == b);
}
/* it is assumed p0<=p1 and both were generated by frptofchar() */
void
frselectf(Frame *f, Point p0, Point p1, Fcode c)
{
int n;
Point q0, q1;
if(p0.x == f->left)
p0.x = f->r.min.x;
if(p1.x == f->left)
p1.x = f->r.min.x;
q0 = p0;
q1 = p1;
q0.y += f->font->height;
q1.y += f->font->height;
n = (p1.y-p0.y)/f->font->height;
if(f->b == 0)
berror("frselectf b==0");
if(p0.y == f->r.max.y)
return;
if(n == 0){
if(p0.x == p1.x)
if(p0.x == f->r.min.x)
q1.x++;
else
p0.x--;
bitblt(f->b, p0, f->b, Rpt(p0, q1), c);
}else{
if(p0.x >= f->r.max.x)
p0.x = f->r.max.x-1;
bitblt(f->b, p0, f->b, Rect(p0.x, p0.y, f->r.max.x, q0.y), c);
if(n > 1)
bitblt(f->b, Pt(f->r.min.x, q0.y),
f->b, Rect(f->r.min.x, q0.y, f->r.max.x, p1.y), c);
bitblt(f->b, Pt(f->r.min.x, p1.y),
f->b, Rect(f->r.min.x, p1.y, q1.x, q1.y), c);
}
}
void
frselectp(Frame *f, Fcode c)
{
Point pt0, pt1;
pt0 = frptofchar(f, f->p0);
pt1 = (f->p0==f->p1)? pt0 : frptofchar(f, f->p1);
frselectf(f, pt0, pt1, c);
}
|
