1 /* $Id: roff_term.c,v 1.14 2017/06/24 14:38:33 schwarze Exp $ */ 2 /* 3 * Copyright (c) 2010, 2014, 2015, 2017 Ingo Schwarze <schwarze@openbsd.org> 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 #include <sys/types.h> 18 19 #include <assert.h> 20 #include <stddef.h> 21 22 #include "mandoc.h" 23 #include "roff.h" 24 #include "out.h" 25 #include "term.h" 26 27 #define ROFF_TERM_ARGS struct termp *p, const struct roff_node *n 28 29 typedef void (*roff_term_pre_fp)(ROFF_TERM_ARGS); 30 31 static void roff_term_pre_br(ROFF_TERM_ARGS); 32 static void roff_term_pre_ce(ROFF_TERM_ARGS); 33 static void roff_term_pre_ft(ROFF_TERM_ARGS); 34 static void roff_term_pre_ll(ROFF_TERM_ARGS); 35 static void roff_term_pre_mc(ROFF_TERM_ARGS); 36 static void roff_term_pre_po(ROFF_TERM_ARGS); 37 static void roff_term_pre_sp(ROFF_TERM_ARGS); 38 static void roff_term_pre_ta(ROFF_TERM_ARGS); 39 static void roff_term_pre_ti(ROFF_TERM_ARGS); 40 41 static const roff_term_pre_fp roff_term_pre_acts[ROFF_MAX] = { 42 roff_term_pre_br, /* br */ 43 roff_term_pre_ce, /* ce */ 44 roff_term_pre_ft, /* ft */ 45 roff_term_pre_ll, /* ll */ 46 roff_term_pre_mc, /* mc */ 47 roff_term_pre_po, /* po */ 48 roff_term_pre_ce, /* rj */ 49 roff_term_pre_sp, /* sp */ 50 roff_term_pre_ta, /* ta */ 51 roff_term_pre_ti, /* ti */ 52 }; 53 54 55 void 56 roff_term_pre(struct termp *p, const struct roff_node *n) 57 { 58 assert(n->tok < ROFF_MAX); 59 (*roff_term_pre_acts[n->tok])(p, n); 60 } 61 62 static void 63 roff_term_pre_br(ROFF_TERM_ARGS) 64 { 65 term_newln(p); 66 if (p->flags & TERMP_BRIND) { 67 p->tcol->offset = p->tcol->rmargin; 68 p->tcol->rmargin = p->maxrmargin; 69 p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND); 70 } 71 } 72 73 static void 74 roff_term_pre_ce(ROFF_TERM_ARGS) 75 { 76 const struct roff_node *nc1, *nc2; 77 size_t len, lm; 78 79 roff_term_pre_br(p, n); 80 lm = p->tcol->offset; 81 nc1 = n->child->next; 82 while (nc1 != NULL) { 83 nc2 = nc1; 84 len = 0; 85 do { 86 if (nc2->type == ROFFT_TEXT) { 87 if (len) 88 len++; 89 len += term_strlen(p, nc2->string); 90 } 91 nc2 = nc2->next; 92 } while (nc2 != NULL && (nc2->type != ROFFT_TEXT || 93 (nc2->flags & NODE_LINE) == 0)); 94 p->tcol->offset = len >= p->tcol->rmargin ? 0 : 95 lm + len >= p->tcol->rmargin ? p->tcol->rmargin - len : 96 n->tok == ROFF_rj ? p->tcol->rmargin - len : 97 (lm + p->tcol->rmargin - len) / 2; 98 while (nc1 != nc2) { 99 if (nc1->type == ROFFT_TEXT) 100 term_word(p, nc1->string); 101 else 102 roff_term_pre(p, nc1); 103 nc1 = nc1->next; 104 } 105 p->flags |= TERMP_NOSPACE; 106 term_flushln(p); 107 } 108 p->tcol->offset = lm; 109 } 110 111 static void 112 roff_term_pre_ft(ROFF_TERM_ARGS) 113 { 114 switch (*n->child->string) { 115 case '4': 116 case '3': 117 case 'B': 118 term_fontrepl(p, TERMFONT_BOLD); 119 break; 120 case '2': 121 case 'I': 122 term_fontrepl(p, TERMFONT_UNDER); 123 break; 124 case 'P': 125 term_fontlast(p); 126 break; 127 case '1': 128 case 'C': 129 case 'R': 130 term_fontrepl(p, TERMFONT_NONE); 131 break; 132 default: 133 break; 134 } 135 } 136 137 static void 138 roff_term_pre_ll(ROFF_TERM_ARGS) 139 { 140 term_setwidth(p, n->child != NULL ? n->child->string : NULL); 141 } 142 143 static void 144 roff_term_pre_mc(ROFF_TERM_ARGS) 145 { 146 if (p->col) { 147 p->flags |= TERMP_NOBREAK; 148 term_flushln(p); 149 p->flags &= ~(TERMP_NOBREAK | TERMP_NOSPACE); 150 } 151 if (n->child != NULL) { 152 p->mc = n->child->string; 153 p->flags |= TERMP_NEWMC; 154 } else 155 p->flags |= TERMP_ENDMC; 156 } 157 158 static void 159 roff_term_pre_po(ROFF_TERM_ARGS) 160 { 161 struct roffsu su; 162 static int po, polast; 163 int ponew; 164 165 if (n->child != NULL && 166 a2roffsu(n->child->string, &su, SCALE_EM) != NULL) { 167 ponew = term_hen(p, &su); 168 if (*n->child->string == '+' || 169 *n->child->string == '-') 170 ponew += po; 171 } else 172 ponew = polast; 173 polast = po; 174 po = ponew; 175 176 ponew = po - polast + (int)p->tcol->offset; 177 p->tcol->offset = ponew > 0 ? ponew : 0; 178 } 179 180 static void 181 roff_term_pre_sp(ROFF_TERM_ARGS) 182 { 183 struct roffsu su; 184 int len; 185 186 if (n->child != NULL) { 187 if (a2roffsu(n->child->string, &su, SCALE_VS) == NULL) 188 su.scale = 1.0; 189 len = term_vspan(p, &su); 190 } else 191 len = 1; 192 193 if (len < 0) 194 p->skipvsp -= len; 195 else 196 while (len--) 197 term_vspace(p); 198 199 roff_term_pre_br(p, n); 200 } 201 202 static void 203 roff_term_pre_ta(ROFF_TERM_ARGS) 204 { 205 term_tab_set(p, NULL); 206 for (n = n->child; n != NULL; n = n->next) 207 term_tab_set(p, n->string); 208 } 209 210 static void 211 roff_term_pre_ti(ROFF_TERM_ARGS) 212 { 213 struct roffsu su; 214 const char *cp; 215 int len, sign; 216 217 roff_term_pre_br(p, n); 218 219 if (n->child == NULL) 220 return; 221 cp = n->child->string; 222 if (*cp == '+') { 223 sign = 1; 224 cp++; 225 } else if (*cp == '-') { 226 sign = -1; 227 cp++; 228 } else 229 sign = 0; 230 231 if (a2roffsu(cp, &su, SCALE_EM) == NULL) 232 return; 233 len = term_hen(p, &su); 234 235 if (sign == 0) { 236 p->ti = len - p->tcol->offset; 237 p->tcol->offset = len; 238 } else if (sign == 1) { 239 p->ti = len; 240 p->tcol->offset += len; 241 } else if ((size_t)len < p->tcol->offset) { 242 p->ti = -len; 243 p->tcol->offset -= len; 244 } else { 245 p->ti = -p->tcol->offset; 246 p->tcol->offset = 0; 247 } 248 } 249