tblockgen.c - plan9port - [fork] Plan 9 from user space
HTML git clone git://src.adamsgaard.dk/plan9port
DIR Log
DIR Files
DIR Refs
DIR README
DIR LICENSE
---
tblockgen.c (5209B)
---
1 #include <stdio.h>
2 #include <stdlib.h>
3 #include "pic.h"
4 #include "y.tab.h"
5
6 #define NBRACK 20 /* depth of [...] */
7 #define NBRACE 20 /* depth of {...} */
8
9 struct pushstack stack[NBRACK];
10 int nstack = 0;
11 struct pushstack bracestack[NBRACE];
12 int nbstack = 0;
13
14 void blockadj(obj *);
15
16 obj *leftthing(int c) /* called for {... or [... */
17 /* really ought to be separate functions */
18 {
19 obj *p;
20
21 if (c == '[') {
22 if (nstack >= NBRACK)
23 ERROR "[...] nested too deep" FATAL;
24 stack[nstack].p_x = curx;
25 stack[nstack].p_y = cury;
26 stack[nstack].p_hvmode = hvmode;
27 curx = cury = 0;
28 stack[nstack].p_xmin = xmin;
29 stack[nstack].p_xmax = xmax;
30 stack[nstack].p_ymin = ymin;
31 stack[nstack].p_ymax = ymax;
32 nstack++;
33 xmin = ymin = 30000;
34 xmax = ymax = -30000;
35 p = makenode(BLOCK, 7);
36 p->o_val[4] = nobj; /* 1st item within [...] */
37 if (p->o_nobj != nobj-1)
38 fprintf(stderr, "nobjs wrong%d %d\n", p->o_nobj, nobj);
39 } else {
40 if (nbstack >= NBRACK)
41 ERROR "{...} nested too deep" FATAL;
42 bracestack[nbstack].p_x = curx;
43 bracestack[nbstack].p_y = cury;
44 bracestack[nbstack].p_hvmode = hvmode;
45 nbstack++;
46 p = NULL;
47 }
48 return(p);
49 }
50
51 obj *rightthing(obj *p, int c) /* called for ... ] or ... } */
52 {
53 obj *q;
54
55 if (c == '}') {
56 nbstack--;
57 curx = bracestack[nbstack].p_x;
58 cury = bracestack[nbstack].p_y;
59 hvmode = bracestack[nbstack].p_hvmode;
60 q = makenode(MOVE, 0);
61 dprintf("M %g %g\n", curx, cury);
62 } else {
63 nstack--;
64 curx = stack[nstack].p_x;
65 cury = stack[nstack].p_y;
66 hvmode = stack[nstack].p_hvmode;
67 q = makenode(BLOCKEND, 7);
68 q->o_val[4] = p->o_nobj + 1; /* back pointer */
69 p->o_val[5] = q->o_nobj - 1; /* forward pointer */
70 if (xmin > xmax) /* nothing happened */
71 xmin = xmax;
72 if (ymin > ymax)
73 ymin = ymax;
74 p->o_val[0] = xmin; p->o_val[1] = ymin;
75 p->o_val[2] = xmax; p->o_val[3] = ymax;
76 p->o_symtab = q->o_symtab = stack[nstack+1].p_symtab;
77 xmin = stack[nstack].p_xmin;
78 ymin = stack[nstack].p_ymin;
79 xmax = stack[nstack].p_xmax;
80 ymax = stack[nstack].p_ymax;
81 }
82 return(q);
83 }
84
85 obj *blockgen(obj *p, obj *q) /* handles [...] */
86 {
87 int i, invis, at, with;
88 double ddval, h, w, xwith, ywith;
89 double x0, y0, x1, y1, cx, cy;
90 obj *ppos;
91 Attr *ap;
92
93 invis = at = 0;
94 with = xwith = ywith = 0;
95 ddval = 0;
96 w = p->o_val[2] - p->o_val[0];
97 h = p->o_val[3] - p->o_val[1];
98 cx = (p->o_val[2] + p->o_val[0]) / 2; /* geom ctr of [] wrt local orogin */
99 cy = (p->o_val[3] + p->o_val[1]) / 2;
100 dprintf("cx,cy=%g,%g\n", cx, cy);
101 for (i = 0; i < nattr; i++) {
102 ap = &attr[i];
103 switch (ap->a_type) {
104 case HEIGHT:
105 h = ap->a_val.f;
106 break;
107 case WIDTH:
108 w = ap->a_val.f;
109 break;
110 case WITH:
111 with = ap->a_val.i; /* corner */
112 break;
113 case PLACE: /* actually with position ... */
114 ppos = ap->a_val.o;
115 xwith = cx - ppos->o_x;
116 ywith = cy - ppos->o_y;
117 with = PLACE;
118 break;
119 case AT:
120 case FROM:
121 ppos = ap->a_val.o;
122 curx = ppos->o_x;
123 cury = ppos->o_y;
124 at++;
125 break;
126 case INVIS:
127 invis = INVIS;
128 break;
129 case TEXTATTR:
130 savetext(ap->a_sub, ap->a_val.p);
131 break;
132 }
133 }
134 if (with) {
135 switch (with) {
136 case NORTH: ywith = -h / 2; break;
137 case SOUTH: ywith = h / 2; break;
138 case EAST: xwith = -w / 2; break;
139 case WEST: xwith = w / 2; break;
140 case NE: xwith = -w / 2; ywith = -h / 2; break;
141 case SE: xwith = -w / 2; ywith = h / 2; break;
142 case NW: xwith = w / 2; ywith = -h / 2; break;
143 case SW: xwith = w / 2; ywith = h / 2; break;
144 }
145 curx += xwith;
146 cury += ywith;
147 }
148 if (!at) {
149 if (isright(hvmode))
150 curx += w / 2;
151 else if (isleft(hvmode))
152 curx -= w / 2;
153 else if (isup(hvmode))
154 cury += h / 2;
155 else
156 cury -= h / 2;
157 }
158 x0 = curx - w / 2;
159 y0 = cury - h / 2;
160 x1 = curx + w / 2;
161 y1 = cury + h / 2;
162 extreme(x0, y0);
163 extreme(x1, y1);
164 p->o_x = curx;
165 p->o_y = cury;
166 p->o_nt1 = ntext1;
167 p->o_nt2 = ntext;
168 ntext1 = ntext;
169 p->o_val[0] = w;
170 p->o_val[1] = h;
171 p->o_val[2] = cx;
172 p->o_val[3] = cy;
173 p->o_val[5] = q->o_nobj - 1; /* last item in [...] */
174 p->o_ddval = ddval;
175 p->o_attr = invis;
176 dprintf("[] %g %g %g %g at %g %g, h=%g, w=%g\n", x0, y0, x1, y1, curx, cury, h, w);
177 if (isright(hvmode))
178 curx = x1;
179 else if (isleft(hvmode))
180 curx = x0;
181 else if (isup(hvmode))
182 cury = y1;
183 else
184 cury = y0;
185 for (i = 0; i <= 5; i++)
186 q->o_val[i] = p->o_val[i];
187 stack[nstack+1].p_symtab = NULL; /* so won't be found again */
188 blockadj(p); /* fix up coords for enclosed blocks */
189 return(p);
190 }
191
192 void blockadj(obj *p) /* adjust coords in block starting at p */
193 {
194 double dx, dy;
195 int n, lev;
196
197 dx = p->o_x - p->o_val[2];
198 dy = p->o_y - p->o_val[3];
199 n = p->o_nobj + 1;
200 dprintf("into blockadj: dx,dy=%g,%g\n", dx, dy);
201 for (lev = 1; lev > 0; n++) {
202 p = objlist[n];
203 if (p->o_type == BLOCK)
204 lev++;
205 else if (p->o_type == BLOCKEND)
206 lev--;
207 dprintf("blockadj: type=%d o_x,y=%g,%g;", p->o_type, p->o_x, p->o_y);
208 p->o_x += dx;
209 p->o_y += dy;
210 dprintf(" becomes %g,%g\n", p->o_x, p->o_y);
211 switch (p->o_type) { /* other absolute coords */
212 case LINE:
213 case ARROW:
214 case SPLINE:
215 p->o_val[0] += dx;
216 p->o_val[1] += dy;
217 break;
218 case ARC:
219 p->o_val[0] += dx;
220 p->o_val[1] += dy;
221 p->o_val[2] += dx;
222 p->o_val[3] += dy;
223 break;
224 }
225 }
226 }