ttu.c - plan9port - [fork] Plan 9 from user space
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ttu.c (4777B)
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1 /* tu.c: draws horizontal lines */
2 # include "t.h"
3
4 void
5 makeline(int i, int c, int lintype)
6 {
7 int cr, type, shortl;
8
9 type = thish(i, c);
10 if (type == 0)
11 return;
12 shortl = (table[i][c].col[0] == '\\');
13 if (c > 0 && !shortl && thish(i, c - 1) == type)
14 return;
15 if (shortl == 0)
16 for (cr = c; cr < ncol && (ctype(i, cr) == 's' || type == thish(i, cr)); cr++)
17 ;
18 else
19 for (cr = c + 1; cr < ncol && ctype(i, cr) == 's'; cr++)
20 ;
21 drawline(i, c, cr - 1, lintype, 0, shortl);
22 }
23
24
25 void
26 fullwide(int i, int lintype)
27 {
28 int cr, cl;
29
30 if (!pr1403)
31 Bprint(&tabout, ".nr %d \\n(.v\n.vs \\n(.vu-\\n(.sp\n", SVS);
32 cr = 0;
33 while (cr < ncol) {
34 cl = cr;
35 while (i > 0 && vspand(prev(i), cl, 1))
36 cl++;
37 for (cr = cl; cr < ncol; cr++)
38 if (i > 0 && vspand(prev(i), cr, 1))
39 break;
40 if (cl < ncol)
41 drawline(i, cl, (cr < ncol ? cr - 1 : cr), lintype, 1, 0);
42 }
43 Bprint(&tabout, "\n");
44 if (!pr1403)
45 Bprint(&tabout, ".vs \\n(%du\n", SVS);
46 }
47
48
49 void
50 drawline(int i, int cl, int cr, int lintype, int noheight, int shortl)
51 {
52 char *exhr, *exhl, *lnch;
53 int lcount, ln, linpos, oldpos, nodata;
54
55 lcount = 0;
56 exhr = exhl = "";
57 switch (lintype) {
58 case '-':
59 lcount = 1;
60 break;
61 case '=':
62 lcount = pr1403 ? 1 : 2;
63 break;
64 case SHORTLINE:
65 lcount = 1;
66 break;
67 }
68 if (lcount <= 0)
69 return;
70 nodata = cr - cl >= ncol || noheight || allh(i);
71 if (!nodata)
72 Bprint(&tabout, "\\v'-.5m'");
73 for (ln = oldpos = 0; ln < lcount; ln++) {
74 linpos = 2 * ln - lcount + 1;
75 if (linpos != oldpos)
76 Bprint(&tabout, "\\v'%dp'", linpos - oldpos);
77 oldpos = linpos;
78 if (shortl == 0) {
79 tohcol(cl);
80 if (lcount > 1) {
81 switch (interv(i, cl)) {
82 case TOP:
83 exhl = ln == 0 ? "1p" : "-1p";
84 break;
85 case BOT:
86 exhl = ln == 1 ? "1p" : "-1p";
87 break;
88 case THRU:
89 exhl = "1p";
90 break;
91 }
92 if (exhl[0])
93 Bprint(&tabout, "\\h'%s'", exhl);
94 } else if (lcount == 1) {
95 switch (interv(i, cl)) {
96 case TOP:
97 case BOT:
98 exhl = "-1p";
99 break;
100 case THRU:
101 exhl = "1p";
102 break;
103 }
104 if (exhl[0])
105 Bprint(&tabout, "\\h'%s'", exhl);
106 }
107 if (lcount > 1) {
108 switch (interv(i, cr + 1)) {
109 case TOP:
110 exhr = ln == 0 ? "-1p" : "+1p";
111 break;
112 case BOT:
113 exhr = ln == 1 ? "-1p" : "+1p";
114 break;
115 case THRU:
116 exhr = "-1p";
117 break;
118 }
119 } else if (lcount == 1) {
120 switch (interv(i, cr + 1)) {
121 case TOP:
122 case BOT:
123 exhr = "+1p";
124 break;
125 case THRU:
126 exhr = "-1p";
127 break;
128 }
129 }
130 } else
131 Bprint(&tabout, "\\h'|\\n(%2su'", reg(cl, CLEFT));
132 Bprint(&tabout, "\\s\\n(%d", LSIZE);
133 if (linsize)
134 Bprint(&tabout, "\\v'-\\n(%dp/6u'", LSIZE);
135 if (shortl)
136 Bprint(&tabout, "\\l'|\\n(%2su'", reg(cr, CRIGHT));
137 else
138 {
139 lnch = "\\(ul";
140 if (pr1403)
141 lnch = lintype == 2 ? "=" : "\\(ru";
142 if (cr + 1 >= ncol)
143 Bprint(&tabout, "\\l'|\\n(TWu%s%s'", exhr, lnch);
144 else
145 Bprint(&tabout, "\\l'(|\\n(%2su+|\\n(%2su)/2u%s%s'", reg(cr, CRIGHT),
146 reg(cr + 1, CLEFT), exhr, lnch);
147 }
148 if (linsize)
149 Bprint(&tabout, "\\v'\\n(%dp/6u'", LSIZE);
150 Bprint(&tabout, "\\s0");
151 }
152 if (oldpos != 0)
153 Bprint(&tabout, "\\v'%dp'", -oldpos);
154 if (!nodata)
155 Bprint(&tabout, "\\v'+.5m'");
156 }
157
158
159 void
160 getstop(void)
161 {
162 int i, c, k, junk, stopp;
163
164 stopp = 1;
165 for (i = 0; i < MAXLIN; i++)
166 linestop[i] = 0;
167 for (i = 0; i < nlin; i++)
168 for (c = 0; c < ncol; c++) {
169 k = left(i, c, &junk);
170 if (k >= 0 && linestop[k] == 0)
171 linestop[k] = ++stopp;
172 }
173 if (boxflg || allflg || dboxflg)
174 linestop[0] = 1;
175 }
176
177
178 int
179 left(int i, int c, int *lwidp)
180 {
181 int kind, li, lj;
182 /* returns -1 if no line to left */
183 /* returns number of line where it starts */
184 /* stores into lwid the kind of line */
185 *lwidp = 0;
186 if (i < 0)
187 return(-1);
188 kind = lefdata(i, c);
189 if (kind == 0)
190 return(-1);
191 if (i + 1 < nlin)
192 if (lefdata(next(i), c) == kind)
193 return(-1);
194 li = i;
195 while (i >= 0 && lefdata(i, c) == kind)
196 i = prev(li = i);
197 if (prev(li) == -1)
198 li = 0;
199 *lwidp = kind;
200 for (lj = i + 1; lj < li; lj++)
201 if (instead[lj] && strcmp(instead[lj], ".TH") == 0)
202 return(li);
203 for (i = i + 1; i < li; i++)
204 if (fullbot[i])
205 li = i;
206 return(li);
207 }
208
209
210 int
211 lefdata(int i, int c)
212 {
213 int ck;
214
215 if (i >= nlin)
216 i = nlin - 1;
217 if (ctype(i, c) == 's') {
218 for (ck = c; ctype(i, ck) == 's'; ck--)
219 ;
220 if (thish(i, ck) == 0)
221 return(0);
222 }
223 i = stynum[i];
224 i = lefline[c][i];
225 if (i > 0)
226 return(i);
227 if (dboxflg && c == 0)
228 return(2);
229 if (allflg)
230 return(1);
231 if (boxflg && c == 0)
232 return(1);
233 return(0);
234 }
235
236
237 int
238 next(int i)
239 {
240 while (i + 1 < nlin) {
241 i++;
242 if (!fullbot[i] && !instead[i])
243 break;
244 }
245 return(i);
246 }
247
248
249 int
250 prev(int i)
251 {
252 while (--i >= 0 && (fullbot[i] || instead[i]))
253 ;
254 return(i);
255 }