tfrdraw.c - plan9port - [fork] Plan 9 from user space
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tfrdraw.c (4225B)
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1 #include <u.h>
2 #include <libc.h>
3 #include <draw.h>
4 #include <mouse.h>
5 #include <frame.h>
6
7 void
8 _frdrawtext(Frame *f, Point pt, Image *text, Image *back)
9 {
10 Frbox *b;
11 int nb;
12
13 for(nb=0,b=f->box; nb<f->nbox; nb++, b++){
14 _frcklinewrap(f, &pt, b);
15 if(!f->noredraw && b->nrune >= 0)
16 stringbg(f->b, pt, text, ZP, f->font, (char*)b->ptr, back, ZP);
17 pt.x += b->wid;
18 }
19 }
20
21 static int
22 nbytes(char *s0, int nr)
23 {
24 char *s;
25 Rune r;
26
27 s = s0;
28 while(--nr >= 0)
29 s += chartorune(&r, s);
30 return s-s0;
31 }
32
33 void
34 frdrawsel(Frame *f, Point pt, ulong p0, ulong p1, int issel)
35 {
36 Image *back, *text;
37
38 if(f->ticked)
39 frtick(f, frptofchar(f, f->p0), 0);
40
41 if(p0 == p1){
42 frtick(f, pt, issel);
43 return;
44 }
45
46 if(issel){
47 back = f->cols[HIGH];
48 text = f->cols[HTEXT];
49 }else{
50 back = f->cols[BACK];
51 text = f->cols[TEXT];
52 }
53
54 frdrawsel0(f, pt, p0, p1, back, text);
55 }
56
57 Point
58 frdrawsel0(Frame *f, Point pt, ulong p0, ulong p1, Image *back, Image *text)
59 {
60 Frbox *b;
61 int nb, nr, w, x, trim;
62 Point qt;
63 uint p;
64 char *ptr;
65
66 if(p0 > p1)
67 sysfatal("libframe: frdrawsel0 p0=%lud > p1=%lud", p0, p1);
68
69 p = 0;
70 b = f->box;
71 trim = 0;
72 for(nb=0; nb<f->nbox && p<p1; nb++){
73 nr = b->nrune;
74 if(nr < 0)
75 nr = 1;
76 if(p+nr <= p0)
77 goto Continue;
78 if(p >= p0){
79 qt = pt;
80 _frcklinewrap(f, &pt, b);
81 /* fill in the end of a wrapped line */
82 if(pt.y > qt.y)
83 draw(f->b, Rect(qt.x, qt.y, f->r.max.x, pt.y), back, nil, qt);
84 }
85 ptr = (char*)b->ptr;
86 if(p < p0){ /* beginning of region: advance into box */
87 ptr += nbytes(ptr, p0-p);
88 nr -= (p0-p);
89 p = p0;
90 }
91 trim = 0;
92 if(p+nr > p1){ /* end of region: trim box */
93 nr -= (p+nr)-p1;
94 trim = 1;
95 }
96 if(b->nrune<0 || nr==b->nrune)
97 w = b->wid;
98 else
99 w = stringnwidth(f->font, ptr, nr);
100 x = pt.x+w;
101 if(x > f->r.max.x)
102 x = f->r.max.x;
103 draw(f->b, Rect(pt.x, pt.y, x, pt.y+f->font->height), back, nil, pt);
104 if(b->nrune >= 0)
105 stringnbg(f->b, pt, text, ZP, f->font, ptr, nr, back, ZP);
106 pt.x += w;
107 Continue:
108 b++;
109 p += nr;
110 }
111 /* if this is end of last plain text box on wrapped line, fill to end of line */
112 if(p1>p0 && b>f->box && b<f->box+f->nbox && b[-1].nrune>0 && !trim){
113 qt = pt;
114 _frcklinewrap(f, &pt, b);
115 if(pt.y > qt.y)
116 draw(f->b, Rect(qt.x, qt.y, f->r.max.x, pt.y), back, nil, qt);
117 }
118 return pt;
119 }
120
121 void
122 frredraw(Frame *f)
123 {
124 int ticked;
125 Point pt;
126
127 if(f->p0 == f->p1){
128 ticked = f->ticked;
129 if(ticked)
130 frtick(f, frptofchar(f, f->p0), 0);
131 frdrawsel0(f, frptofchar(f, 0), 0, f->nchars, f->cols[BACK], f->cols[TEXT]);
132 if(ticked)
133 frtick(f, frptofchar(f, f->p0), 1);
134 return;
135 }
136
137 pt = frptofchar(f, 0);
138 pt = frdrawsel0(f, pt, 0, f->p0, f->cols[BACK], f->cols[TEXT]);
139 pt = frdrawsel0(f, pt, f->p0, f->p1, f->cols[HIGH], f->cols[HTEXT]);
140 pt = frdrawsel0(f, pt, f->p1, f->nchars, f->cols[BACK], f->cols[TEXT]);
141 }
142
143 static void
144 _frtick(Frame *f, Point pt, int ticked)
145 {
146 Rectangle r;
147
148 if(f->ticked==ticked || f->tick==0 || !ptinrect(pt, f->r))
149 return;
150 pt.x -= f->tickscale; /* looks best just left of where requested */
151 r = Rect(pt.x, pt.y, pt.x+FRTICKW*f->tickscale, pt.y+f->font->height);
152 /* can go into left border but not right */
153 if(r.max.x > f->r.max.x)
154 r.max.x = f->r.max.x;
155 if(ticked){
156 draw(f->tickback, f->tickback->r, f->b, nil, pt);
157 draw(f->b, r, f->tick, nil, ZP);
158 }else
159 draw(f->b, r, f->tickback, nil, ZP);
160 f->ticked = ticked;
161 }
162
163 void
164 frtick(Frame *f, Point pt, int ticked)
165 {
166 if(f->tickscale != scalesize(f->display, 1)) {
167 if(f->ticked)
168 _frtick(f, pt, 0);
169 frinittick(f);
170 }
171 _frtick(f, pt, ticked);
172 }
173
174 Point
175 _frdraw(Frame *f, Point pt)
176 {
177 Frbox *b;
178 int nb, n;
179
180 for(b=f->box,nb=0; nb<f->nbox; nb++, b++){
181 _frcklinewrap0(f, &pt, b);
182 if(pt.y == f->r.max.y){
183 f->nchars -= _frstrlen(f, nb);
184 _frdelbox(f, nb, f->nbox-1);
185 break;
186 }
187 if(b->nrune > 0){
188 n = _frcanfit(f, pt, b);
189 if(n == 0)
190 break;
191 if(n != b->nrune){
192 _frsplitbox(f, nb, n);
193 b = &f->box[nb];
194 }
195 pt.x += b->wid;
196 }else{
197 if(b->bc == '\n'){
198 pt.x = f->r.min.x;
199 pt.y+=f->font->height;
200 }else
201 pt.x += _frnewwid(f, pt, b);
202 }
203 }
204 return pt;
205 }
206
207 int
208 _frstrlen(Frame *f, int nb)
209 {
210 int n;
211
212 for(n=0; nb<f->nbox; nb++)
213 n += NRUNE(&f->box[nb]);
214 return n;
215 }