1 #include <u.h>
2 #include <libc.h>
3 #include <draw.h>
4 #include <mouse.h>
5 #include <frame.h>
6 
7 void
8 _frredraw(Frame *f, Point pt)
9 {
10 	Frbox *b;
11 	int nb;
12 	/* static int x; */
13 
14 	for(nb=0,b=f->box; nb<f->nbox; nb++, b++){
15 		_frcklinewrap(f, &pt, b);
16 		if(b->nrune >= 0){
17 			string(f->b, pt, f->cols[TEXT], ZP, f->font, (char *)b->ptr);
18 		}
19 		pt.x += b->wid;
20 	}
21 }
22 
23 static int
24 nbytes(char *s0, int nr)
25 {
26 	char *s;
27 	Rune r;
28 
29 	s = s0;
30 	while(--nr >= 0)
31 		s += chartorune(&r, s);
32 	return s-s0;
33 }
34 
35 void
36 frdrawsel(Frame *f, Point pt, ulong p0, ulong p1, int issel)
37 {
38 	Image *back, *text;
39 
40 	if(f->ticked)
41 		frtick(f, frptofchar(f, f->p0), 0);
42 
43 	if(p0 == p1){
44 		frtick(f, pt, issel);
45 		return;
46 	}
47 
48 	if(issel){
49 		back = f->cols[HIGH];
50 		text = f->cols[HTEXT];
51 	}else{
52 		back = f->cols[BACK];
53 		text = f->cols[TEXT];
54 	}
55 
56 	frdrawsel0(f, pt, p0, p1, back, text);
57 }
58 
59 void
60 frdrawsel0(Frame *f, Point pt, ulong p0, ulong p1, Image *back, Image *text)
61 {
62 	Frbox *b;
63 	int nb, nr, w, x, trim;
64 	Point qt;
65 	uint p;
66 	char *ptr;
67 
68 	p = 0;
69 	b = f->box;
70 	trim = 0;
71 	for(nb=0; nb<f->nbox && p<p1; nb++){
72 		nr = b->nrune;
73 		if(nr < 0)
74 			nr = 1;
75 		if(p+nr <= p0)
76 			goto Continue;
77 		if(p >= p0){
78 			qt = pt;
79 			_frcklinewrap(f, &pt, b);
80 			if(pt.y > qt.y)
81 				draw(f->b, Rect(qt.x, qt.y, f->r.max.x, pt.y), back, nil, qt);
82 		}
83 		ptr = (char*)b->ptr;
84 		if(p < p0){	/* beginning of region: advance into box */
85 			ptr += nbytes(ptr, p0-p);
86 			nr -= (p0-p);
87 			p = p0;
88 		}
89 		trim = 0;
90 		if(p+nr > p1){	/* end of region: trim box */
91 			nr -= (p+nr)-p1;
92 			trim = 1;
93 		}
94 		if(b->nrune<0 || nr==b->nrune)
95 			w = b->wid;
96 		else
97 			w = stringnwidth(f->font, ptr, nr);
98 		x = pt.x+w;
99 		if(x > f->r.max.x)
100 			x = f->r.max.x;
101 		draw(f->b, Rect(pt.x, pt.y, x, pt.y+f->font->height), back, nil, pt);
102 		if(b->nrune >= 0)
103 			stringn(f->b, pt, text, ZP, f->font, ptr, nr);
104 		pt.x += w;
105 	    Continue:
106 		b++;
107 		p += nr;
108 	}
109 	/* if this is end of last plain text box on wrapped line, fill to end of line */
110 	if(p1>p0 &&  b>f->box && b<f->box+f->nbox && b[-1].nrune>0 && !trim){
111 		qt = pt;
112 		_frcklinewrap(f, &pt, b);
113 		if(pt.y > qt.y)
114 			draw(f->b, Rect(qt.x, qt.y, f->r.max.x, pt.y), back, nil, qt);
115 	}
116 }
117 
118 void
119 frtick(Frame *f, Point pt, int ticked)
120 {
121 	Rectangle r;
122 
123 	if(f->ticked==ticked || f->tick==0 || !ptinrect(pt, f->r))
124 		return;
125 	pt.x--;	/* looks best just left of where requested */
126 	r = Rect(pt.x, pt.y, pt.x+FRTICKW, pt.y+f->font->height);
127 	if(ticked){
128 		draw(f->tickback, f->tickback->r, f->b, nil, pt);
129 		draw(f->b, r, f->tick, nil, ZP);
130 	}else
131 		draw(f->b, r, f->tickback, nil, ZP);
132 	f->ticked = ticked;
133 }
134 
135 Point
136 _frdraw(Frame *f, Point pt)
137 {
138 	Frbox *b;
139 	int nb, n;
140 
141 	for(b=f->box,nb=0; nb<f->nbox; nb++, b++){
142 		_frcklinewrap0(f, &pt, b);
143 		if(pt.y == f->r.max.y){
144 			f->nchars -= _frstrlen(f, nb);
145 			_frdelbox(f, nb, f->nbox-1);
146 			break;
147 		}
148 		if(b->nrune > 0){
149 			n = _frcanfit(f, pt, b);
150 			if(n == 0)
151 				drawerror(f->display, "_frcanfit==0");
152 			if(n != b->nrune){
153 				_frsplitbox(f, nb, n);
154 				b = &f->box[nb];
155 			}
156 			pt.x += b->wid;
157 		}else{
158 			if(b->bc == '\n'){
159 				pt.x = f->r.min.x;
160 				pt.y+=f->font->height;
161 			}else
162 				pt.x += _frnewwid(f, pt, b);
163 		}
164 	}
165 	return pt;
166 }
167 
168 int
169 _frstrlen(Frame *f, int nb)
170 {
171 	int n;
172 
173 	for(n=0; nb<f->nbox; nb++)
174 		n += NRUNE(&f->box[nb]);
175 	return n;
176 }