frdraw.c (4225B)
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 }