Annotation of src/usr.bin/mandoc/out.c, Revision 1.36
1.36 ! schwarze 1: /* $OpenBSD: out.c,v 1.35 2017/05/01 20:53:58 schwarze Exp $ */
1.1 schwarze 2: /*
1.9 schwarze 3: * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.35 schwarze 4: * Copyright (c) 2011, 2014, 2015, 2017 Ingo Schwarze <schwarze@openbsd.org>
1.1 schwarze 5: *
6: * Permission to use, copy, modify, and distribute this software for any
7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
9: *
10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17: */
18: #include <sys/types.h>
19:
1.2 schwarze 20: #include <assert.h>
1.1 schwarze 21: #include <stdlib.h>
1.2 schwarze 22: #include <string.h>
23: #include <time.h>
1.1 schwarze 24:
1.20 schwarze 25: #include "mandoc_aux.h"
1.9 schwarze 26: #include "mandoc.h"
1.1 schwarze 27: #include "out.h"
28:
1.9 schwarze 29: static void tblcalc_data(struct rofftbl *, struct roffcol *,
1.18 schwarze 30: const struct tbl_opts *, const struct tbl_dat *);
1.9 schwarze 31: static void tblcalc_literal(struct rofftbl *, struct roffcol *,
32: const struct tbl_dat *);
33: static void tblcalc_number(struct rofftbl *, struct roffcol *,
1.18 schwarze 34: const struct tbl_opts *, const struct tbl_dat *);
1.9 schwarze 35:
1.21 schwarze 36:
37: /*
1.27 schwarze 38: * Parse the *src string and store a scaling unit into *dst.
39: * If the string doesn't specify the unit, use the default.
40: * If no default is specified, fail.
1.36 ! schwarze 41: * Return a pointer to the byte after the last byte used,
! 42: * or NULL on total failure.
1.1 schwarze 43: */
1.36 ! schwarze 44: const char *
1.1 schwarze 45: a2roffsu(const char *src, struct roffsu *dst, enum roffscale def)
46: {
1.27 schwarze 47: char *endptr;
1.1 schwarze 48:
1.28 schwarze 49: dst->unit = def == SCALE_MAX ? SCALE_BU : def;
50: dst->scale = strtod(src, &endptr);
51: if (endptr == src)
1.36 ! schwarze 52: return NULL;
1.1 schwarze 53:
1.28 schwarze 54: switch (*endptr++) {
1.21 schwarze 55: case 'c':
1.28 schwarze 56: dst->unit = SCALE_CM;
1.1 schwarze 57: break;
1.21 schwarze 58: case 'i':
1.28 schwarze 59: dst->unit = SCALE_IN;
60: break;
61: case 'f':
62: dst->unit = SCALE_FS;
63: break;
64: case 'M':
65: dst->unit = SCALE_MM;
66: break;
67: case 'm':
68: dst->unit = SCALE_EM;
69: break;
70: case 'n':
71: dst->unit = SCALE_EN;
1.1 schwarze 72: break;
1.21 schwarze 73: case 'P':
1.28 schwarze 74: dst->unit = SCALE_PC;
1.1 schwarze 75: break;
1.21 schwarze 76: case 'p':
1.28 schwarze 77: dst->unit = SCALE_PT;
1.1 schwarze 78: break;
1.28 schwarze 79: case 'u':
80: dst->unit = SCALE_BU;
1.1 schwarze 81: break;
1.21 schwarze 82: case 'v':
1.28 schwarze 83: dst->unit = SCALE_VS;
1.1 schwarze 84: break;
1.21 schwarze 85: case '\0':
1.28 schwarze 86: endptr--;
87: /* FALLTHROUGH */
88: default:
1.1 schwarze 89: if (SCALE_MAX == def)
1.36 ! schwarze 90: return NULL;
1.28 schwarze 91: dst->unit = def;
1.1 schwarze 92: break;
93: }
1.36 ! schwarze 94: return endptr;
1.3 schwarze 95: }
1.9 schwarze 96:
97: /*
98: * Calculate the abstract widths and decimal positions of columns in a
99: * table. This routine allocates the columns structures then runs over
100: * all rows and cells in the table. The function pointers in "tbl" are
101: * used for the actual width calculations.
102: */
103: void
1.24 schwarze 104: tblcalc(struct rofftbl *tbl, const struct tbl_span *sp,
105: size_t totalwidth)
1.9 schwarze 106: {
1.30 schwarze 107: const struct tbl_opts *opts;
1.9 schwarze 108: const struct tbl_dat *dp;
109: struct roffcol *col;
1.24 schwarze 110: size_t ewidth, xwidth;
1.16 schwarze 111: int spans;
1.30 schwarze 112: int icol, maxcol, necol, nxcol, quirkcol;
1.9 schwarze 113:
114: /*
115: * Allocate the master column specifiers. These will hold the
116: * widths and decimal positions for all cells in the column. It
117: * must be freed and nullified by the caller.
118: */
119:
120: assert(NULL == tbl->cols);
1.21 schwarze 121: tbl->cols = mandoc_calloc((size_t)sp->opts->cols,
122: sizeof(struct roffcol));
1.30 schwarze 123: opts = sp->opts;
1.9 schwarze 124:
1.25 schwarze 125: for (maxcol = -1; sp; sp = sp->next) {
1.9 schwarze 126: if (TBL_SPAN_DATA != sp->pos)
127: continue;
1.16 schwarze 128: spans = 1;
1.9 schwarze 129: /*
130: * Account for the data cells in the layout, matching it
131: * to data cells in the data section.
132: */
133: for (dp = sp->first; dp; dp = dp->next) {
1.16 schwarze 134: /* Do not used spanned cells in the calculation. */
135: if (0 < --spans)
136: continue;
137: spans = dp->spans;
138: if (1 < spans)
139: continue;
1.31 schwarze 140: icol = dp->layout->col;
1.24 schwarze 141: if (maxcol < icol)
142: maxcol = icol;
143: col = tbl->cols + icol;
144: col->flags |= dp->layout->flags;
145: if (dp->layout->flags & TBL_CELL_WIGN)
146: continue;
1.30 schwarze 147: tblcalc_data(tbl, col, opts, dp);
1.24 schwarze 148: }
149: }
150:
151: /*
152: * Count columns to equalize and columns to maximize.
153: * Find maximum width of the columns to equalize.
154: * Find total width of the columns *not* to maximize.
155: */
156:
157: necol = nxcol = 0;
158: ewidth = xwidth = 0;
159: for (icol = 0; icol <= maxcol; icol++) {
160: col = tbl->cols + icol;
161: if (col->flags & TBL_CELL_EQUAL) {
162: necol++;
163: if (ewidth < col->width)
164: ewidth = col->width;
165: }
166: if (col->flags & TBL_CELL_WMAX)
167: nxcol++;
168: else
169: xwidth += col->width;
170: }
171:
172: /*
173: * Equalize columns, if requested for any of them.
174: * Update total width of the columns not to maximize.
175: */
176:
177: if (necol) {
178: for (icol = 0; icol <= maxcol; icol++) {
179: col = tbl->cols + icol;
180: if ( ! (col->flags & TBL_CELL_EQUAL))
181: continue;
182: if (col->width == ewidth)
183: continue;
184: if (nxcol && totalwidth)
185: xwidth += ewidth - col->width;
186: col->width = ewidth;
187: }
188: }
189:
190: /*
191: * If there are any columns to maximize, find the total
192: * available width, deducting 3n margins between columns.
193: * Distribute the available width evenly.
194: */
195:
196: if (nxcol && totalwidth) {
1.35 schwarze 197: xwidth += 3*maxcol +
1.30 schwarze 198: (opts->opts & (TBL_OPT_BOX | TBL_OPT_DBOX) ?
199: 2 : !!opts->lvert + !!opts->rvert);
1.35 schwarze 200: if (xwidth >= totalwidth)
201: return;
202: xwidth = totalwidth - xwidth;
1.30 schwarze 203:
204: /*
205: * Emulate a bug in GNU tbl width calculation that
206: * manifests itself for large numbers of x-columns.
207: * Emulating it for 5 x-columns gives identical
208: * behaviour for up to 6 x-columns.
209: */
210:
211: if (nxcol == 5) {
212: quirkcol = xwidth % nxcol + 2;
213: if (quirkcol != 3 && quirkcol != 4)
214: quirkcol = -1;
215: } else
216: quirkcol = -1;
217:
218: necol = 0;
219: ewidth = 0;
1.24 schwarze 220: for (icol = 0; icol <= maxcol; icol++) {
221: col = tbl->cols + icol;
222: if ( ! (col->flags & TBL_CELL_WMAX))
223: continue;
1.30 schwarze 224: col->width = (double)xwidth * ++necol / nxcol
225: - ewidth + 0.4995;
226: if (necol == quirkcol)
227: col->width--;
228: ewidth += col->width;
1.9 schwarze 229: }
230: }
231: }
232:
233: static void
234: tblcalc_data(struct rofftbl *tbl, struct roffcol *col,
1.18 schwarze 235: const struct tbl_opts *opts, const struct tbl_dat *dp)
1.9 schwarze 236: {
237: size_t sz;
238:
239: /* Branch down into data sub-types. */
240:
241: switch (dp->layout->pos) {
1.21 schwarze 242: case TBL_CELL_HORIZ:
243: case TBL_CELL_DHORIZ:
1.9 schwarze 244: sz = (*tbl->len)(1, tbl->arg);
245: if (col->width < sz)
246: col->width = sz;
247: break;
1.21 schwarze 248: case TBL_CELL_LONG:
249: case TBL_CELL_CENTRE:
250: case TBL_CELL_LEFT:
251: case TBL_CELL_RIGHT:
1.9 schwarze 252: tblcalc_literal(tbl, col, dp);
253: break;
1.21 schwarze 254: case TBL_CELL_NUMBER:
1.18 schwarze 255: tblcalc_number(tbl, col, opts, dp);
1.9 schwarze 256: break;
1.21 schwarze 257: case TBL_CELL_DOWN:
1.10 schwarze 258: break;
1.9 schwarze 259: default:
260: abort();
261: }
262: }
263:
264: static void
265: tblcalc_literal(struct rofftbl *tbl, struct roffcol *col,
266: const struct tbl_dat *dp)
267: {
1.16 schwarze 268: size_t sz;
1.10 schwarze 269: const char *str;
1.9 schwarze 270:
1.10 schwarze 271: str = dp->string ? dp->string : "";
272: sz = (*tbl->slen)(str, tbl->arg);
273:
1.9 schwarze 274: if (col->width < sz)
275: col->width = sz;
276: }
277:
278: static void
279: tblcalc_number(struct rofftbl *tbl, struct roffcol *col,
1.18 schwarze 280: const struct tbl_opts *opts, const struct tbl_dat *dp)
1.9 schwarze 281: {
1.21 schwarze 282: int i;
1.10 schwarze 283: size_t sz, psz, ssz, d;
284: const char *str;
1.9 schwarze 285: char *cp;
286: char buf[2];
287:
288: /*
289: * First calculate number width and decimal place (last + 1 for
1.16 schwarze 290: * non-decimal numbers). If the stored decimal is subsequent to
1.9 schwarze 291: * ours, make our size longer by that difference
292: * (right-"shifting"); similarly, if ours is subsequent the
293: * stored, then extend the stored size by the difference.
294: * Finally, re-assign the stored values.
295: */
296:
1.10 schwarze 297: str = dp->string ? dp->string : "";
298: sz = (*tbl->slen)(str, tbl->arg);
1.9 schwarze 299:
1.10 schwarze 300: /* FIXME: TBL_DATA_HORIZ et al.? */
1.9 schwarze 301:
1.18 schwarze 302: buf[0] = opts->decimal;
1.9 schwarze 303: buf[1] = '\0';
304:
305: psz = (*tbl->slen)(buf, tbl->arg);
306:
1.18 schwarze 307: if (NULL != (cp = strrchr(str, opts->decimal))) {
1.9 schwarze 308: buf[1] = '\0';
309: for (ssz = 0, i = 0; cp != &str[i]; i++) {
310: buf[0] = str[i];
311: ssz += (*tbl->slen)(buf, tbl->arg);
312: }
313: d = ssz + psz;
314: } else
315: d = sz + psz;
316:
317: /* Adjust the settings for this column. */
318:
319: if (col->decimal > d) {
320: sz += col->decimal - d;
321: d = col->decimal;
322: } else
323: col->width += d - col->decimal;
324:
325: if (sz > col->width)
326: col->width = sz;
327: if (d > col->decimal)
328: col->decimal = d;
329: }
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