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(!f->noredraw && b->nrune >= 0)
17 			string(f->b, pt, f->cols[TEXT], ZP, f->font, (char *)b->ptr);
18 		pt.x += b->wid;
19 	}
20 }
21 
22 static int
23 nbytes(char *s0, int nr)
24 {
25 	char *s;
26 	Rune r;
27 
28 	s = s0;
29 	while(--nr >= 0)
30 		s += chartorune(&r, s);
31 	return s-s0;
32 }
33 
34 void
35 frdrawsel(Frame *f, Point pt, ulong p0, ulong p1, int issel)
36 {
37 	Image *back, *text;
38 
39 	if(f->ticked)
40 		frtick(f, frptofchar(f, f->p0), 0);
41 
42 	if(p0 == p1){
43 		frtick(f, pt, issel);
44 		return;
45 	}
46 
47 	if(issel){
48 		back = f->cols[HIGH];
49 		text = f->cols[HTEXT];
50 	}else{
51 		back = f->cols[BACK];
52 		text = f->cols[TEXT];
53 	}
54 
55 	frdrawsel0(f, pt, p0, p1, back, text);
56 }
57 
58 void
59 frdrawsel0(Frame *f, Point pt, ulong p0, ulong p1, Image *back, Image *text)
60 {
61 	Frbox *b;
62 	int nb, nr, w, x, trim;
63 	Point qt;
64 	uint p;
65 	char *ptr;
66 
67 	p = 0;
68 	b = f->box;
69 	trim = 0;
70 	for(nb=0; nb<f->nbox && p<p1; nb++){
71 		nr = b->nrune;
72 		if(nr < 0)
73 			nr = 1;
74 		if(p+nr <= p0)
75 			goto Continue;
76 		if(p >= p0){
77 			qt = pt;
78 			_frcklinewrap(f, &pt, b);
79 			if(pt.y > qt.y)
80 				draw(f->b, Rect(qt.x, qt.y, f->r.max.x, pt.y), back, nil, qt);
81 		}
82 		ptr = (char*)b->ptr;
83 		if(p < p0){	/* beginning of region: advance into box */
84 			ptr += nbytes(ptr, p0-p);
85 			nr -= (p0-p);
86 			p = p0;
87 		}
88 		trim = 0;
89 		if(p+nr > p1){	/* end of region: trim box */
90 			nr -= (p+nr)-p1;
91 			trim = 1;
92 		}
93 		if(b->nrune<0 || nr==b->nrune)
94 			w = b->wid;
95 		else
96 			w = stringnwidth(f->font, ptr, nr);
97 		x = pt.x+w;
98 		if(x > f->r.max.x)
99 			x = f->r.max.x;
100 		draw(f->b, Rect(pt.x, pt.y, x, pt.y+f->font->height), back, nil, pt);
101 		if(b->nrune >= 0)
102 			stringn(f->b, pt, text, ZP, f->font, ptr, nr);
103 		pt.x += w;
104 	    Continue:
105 		b++;
106 		p += nr;
107 	}
108 	/* if this is end of last plain text box on wrapped line, fill to end of line */
109 	if(p1>p0 &&  b>f->box && b<f->box+f->nbox && b[-1].nrune>0 && !trim){
110 		qt = pt;
111 		_frcklinewrap(f, &pt, b);
112 		if(pt.y > qt.y)
113 			draw(f->b, Rect(qt.x, qt.y, f->r.max.x, pt.y), back, nil, qt);
114 	}
115 }
116 
117 void
118 frtick(Frame *f, Point pt, int ticked)
119 {
120 	Rectangle r;
121 
122 	if(f->ticked==ticked || f->tick==0 || !ptinrect(pt, f->r))
123 		return;
124 	pt.x--;	/* looks best just left of where requested */
125 	r = Rect(pt.x, pt.y, pt.x+FRTICKW, pt.y+f->font->height);
126 	/* can go into left border but not right */
127 	if(r.max.x > f->r.max.x)
128 		r.max.x = f->r.max.x;
129 	if(ticked){
130 		draw(f->tickback, f->tickback->r, f->b, nil, pt);
131 		draw(f->b, r, f->tick, nil, ZP);
132 	}else
133 		draw(f->b, r, f->tickback, nil, ZP);
134 	f->ticked = ticked;
135 }
136 
137 Point
138 _frdraw(Frame *f, Point pt)
139 {
140 	Frbox *b;
141 	int nb, n;
142 
143 	for(b=f->box,nb=0; nb<f->nbox; nb++, b++){
144 		_frcklinewrap0(f, &pt, b);
145 		if(pt.y == f->r.max.y){
146 			f->nchars -= _frstrlen(f, nb);
147 			_frdelbox(f, nb, f->nbox-1);
148 			break;
149 		}
150 		if(b->nrune > 0){
151 			n = _frcanfit(f, pt, b);
152 			if(n == 0)
153 				drawerror(f->display, "_frcanfit==0");
154 			if(n != b->nrune){
155 				_frsplitbox(f, nb, n);
156 				b = &f->box[nb];
157 			}
158 			pt.x += b->wid;
159 		}else{
160 			if(b->bc == '\n'){
161 				pt.x = f->r.min.x;
162 				pt.y+=f->font->height;
163 			}else
164 				pt.x += _frnewwid(f, pt, b);
165 		}
166 	}
167 	return pt;
168 }
169 
170 int
171 _frstrlen(Frame *f, int nb)
172 {
173 	int n;
174 
175 	for(n=0; nb<f->nbox; nb++)
176 		n += NRUNE(&f->box[nb]);
177 	return n;
178 }