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 void
_frdrawtext(Frame * f,Point pt,Image * text,Image * back)9 _frdrawtext(Frame *f, Point pt, Image *text, Image *back)
10 {
11 Frbox *b;
12 int nb;
13 static int x;
14
15 for(nb=0,b=f->box; nb<f->nbox; nb++, b++){
16 _frcklinewrap(f, &pt, b);
17 if(!f->noredraw && b->nrune >= 0)
18 stringbg(f->b, pt, text, ZP, f->font, (char*)b->ptr, back, ZP);
19 pt.x += b->wid;
20 }
21 }
22
23 static int
nbytes(char * s0,int nr)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
frdrawsel(Frame * f,Point pt,ulong p0,ulong p1,int issel)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 Point
frdrawsel0(Frame * f,Point pt,ulong p0,ulong p1,Image * back,Image * text)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 /* fill in the end of a wrapped line */
81 if(pt.y > qt.y)
82 draw(f->b, Rect(qt.x, qt.y, f->r.max.x, pt.y), back, nil, qt);
83 }
84 ptr = (char*)b->ptr;
85 if(p < p0){ /* beginning of region: advance into box */
86 ptr += nbytes(ptr, p0-p);
87 nr -= (p0-p);
88 p = p0;
89 }
90 trim = 0;
91 if(p+nr > p1){ /* end of region: trim box */
92 nr -= (p+nr)-p1;
93 trim = 1;
94 }
95 if(b->nrune<0 || nr==b->nrune)
96 w = b->wid;
97 else
98 w = stringnwidth(f->font, ptr, nr);
99 x = pt.x+w;
100 if(x > f->r.max.x)
101 x = f->r.max.x;
102 draw(f->b, Rect(pt.x, pt.y, x, pt.y+f->font->height), back, nil, pt);
103 if(b->nrune >= 0)
104 stringnbg(f->b, pt, text, ZP, f->font, ptr, nr, back, ZP);
105 pt.x += w;
106 Continue:
107 b++;
108 p += nr;
109 }
110 /* if this is end of last plain text box on wrapped line, fill to end of line */
111 if(p1>p0 && b>f->box && b<f->box+f->nbox && b[-1].nrune>0 && !trim){
112 qt = pt;
113 _frcklinewrap(f, &pt, b);
114 if(pt.y > qt.y)
115 draw(f->b, Rect(qt.x, qt.y, f->r.max.x, pt.y), back, nil, qt);
116 }
117 return pt;
118 }
119
120 void
frredraw(Frame * f)121 frredraw(Frame *f)
122 {
123 int ticked;
124 Point pt;
125
126 if(f->p0 == f->p1){
127 ticked = f->ticked;
128 if(ticked)
129 frtick(f, frptofchar(f, f->p0), 0);
130 frdrawsel0(f, frptofchar(f, 0), 0, f->nchars, f->cols[BACK], f->cols[TEXT]);
131 if(ticked)
132 frtick(f, frptofchar(f, f->p0), 1);
133 return;
134 }
135
136 pt = frptofchar(f, 0);
137 pt = frdrawsel0(f, pt, 0, f->p0, f->cols[BACK], f->cols[TEXT]);
138 pt = frdrawsel0(f, pt, f->p0, f->p1, f->cols[HIGH], f->cols[HTEXT]);
139 pt = frdrawsel0(f, pt, f->p1, f->nchars, f->cols[BACK], f->cols[TEXT]);
140 }
141
142 void
frtick(Frame * f,Point pt,int ticked)143 frtick(Frame *f, Point pt, int ticked)
144 {
145 Rectangle r;
146
147 if(f->ticked==ticked || f->tick==0 || !ptinrect(pt, f->r))
148 return;
149 pt.x--; /* looks best just left of where requested */
150 r = Rect(pt.x, pt.y, pt.x+FRTICKW, pt.y+f->font->height);
151 /* can go into left border but not right */
152 if(r.max.x > f->r.max.x)
153 r.max.x = f->r.max.x;
154 if(ticked){
155 draw(f->tickback, f->tickback->r, f->b, nil, pt);
156 draw(f->b, r, f->tick, nil, ZP);
157 }else
158 draw(f->b, r, f->tickback, nil, ZP);
159 f->ticked = ticked;
160 }
161
162 Point
_frdraw(Frame * f,Point pt)163 _frdraw(Frame *f, Point pt)
164 {
165 Frbox *b;
166 int nb, n;
167
168 for(b=f->box,nb=0; nb<f->nbox; nb++, b++){
169 _frcklinewrap0(f, &pt, b);
170 if(pt.y == f->r.max.y){
171 f->nchars -= _frstrlen(f, nb);
172 _frdelbox(f, nb, f->nbox-1);
173 break;
174 }
175 if(b->nrune > 0){
176 n = _frcanfit(f, pt, b);
177 if(n == 0)
178 drawerror(f->display, "_frcanfit==0");
179 if(n != b->nrune){
180 _frsplitbox(f, nb, n);
181 b = &f->box[nb];
182 }
183 pt.x += b->wid;
184 }else{
185 if(b->bc == '\n'){
186 pt.x = f->r.min.x;
187 pt.y+=f->font->height;
188 }else
189 pt.x += _frnewwid(f, pt, b);
190 }
191 }
192 return pt;
193 }
194
195 int
_frstrlen(Frame * f,int nb)196 _frstrlen(Frame *f, int nb)
197 {
198 int n;
199
200 for(n=0; nb<f->nbox; nb++)
201 n += NRUNE(&f->box[nb]);
202 return n;
203 }
204