Annotation of mandoc/out.c, Revision 1.58
1.58 ! schwarze 1: /* $Id: out.c,v 1.57 2014/12/23 13:48:57 schwarze Exp $ */
1.1 kristaps 2: /*
1.36 schwarze 3: * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.58 ! schwarze 4: * Copyright (c) 2011, 2014, 2015 Ingo Schwarze <schwarze@openbsd.org>
1.1 kristaps 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: */
1.12 kristaps 18: #include "config.h"
19:
1.1 kristaps 20: #include <sys/types.h>
21:
1.6 kristaps 22: #include <assert.h>
1.1 kristaps 23: #include <stdlib.h>
1.6 kristaps 24: #include <string.h>
1.7 kristaps 25: #include <time.h>
1.1 kristaps 26:
1.47 schwarze 27: #include "mandoc_aux.h"
1.30 kristaps 28: #include "mandoc.h"
1.1 kristaps 29: #include "out.h"
30:
1.30 kristaps 31: static void tblcalc_data(struct rofftbl *, struct roffcol *,
1.45 schwarze 32: const struct tbl_opts *, const struct tbl_dat *);
1.30 kristaps 33: static void tblcalc_literal(struct rofftbl *, struct roffcol *,
34: const struct tbl_dat *);
35: static void tblcalc_number(struct rofftbl *, struct roffcol *,
1.45 schwarze 36: const struct tbl_opts *, const struct tbl_dat *);
1.30 kristaps 37:
1.48 schwarze 38:
39: /*
1.55 schwarze 40: * Parse the *src string and store a scaling unit into *dst.
41: * If the string doesn't specify the unit, use the default.
42: * If no default is specified, fail.
1.56 schwarze 43: * Return 2 on complete success, 1 when a conversion was done,
44: * but there was trailing garbage, and 0 on total failure.
1.3 kristaps 45: */
1.1 kristaps 46: int
1.5 kristaps 47: a2roffsu(const char *src, struct roffsu *dst, enum roffscale def)
1.1 kristaps 48: {
1.55 schwarze 49: char *endptr;
1.1 kristaps 50:
1.56 schwarze 51: dst->unit = def == SCALE_MAX ? SCALE_BU : def;
52: dst->scale = strtod(src, &endptr);
53: if (endptr == src)
1.5 kristaps 54: return(0);
55:
1.56 schwarze 56: switch (*endptr++) {
1.48 schwarze 57: case 'c':
1.56 schwarze 58: dst->unit = SCALE_CM;
1.3 kristaps 59: break;
1.48 schwarze 60: case 'i':
1.56 schwarze 61: dst->unit = SCALE_IN;
62: break;
63: case 'f':
64: dst->unit = SCALE_FS;
65: break;
66: case 'M':
67: dst->unit = SCALE_MM;
68: break;
69: case 'm':
70: dst->unit = SCALE_EM;
71: break;
72: case 'n':
73: dst->unit = SCALE_EN;
1.3 kristaps 74: break;
1.48 schwarze 75: case 'P':
1.56 schwarze 76: dst->unit = SCALE_PC;
1.3 kristaps 77: break;
1.48 schwarze 78: case 'p':
1.56 schwarze 79: dst->unit = SCALE_PT;
1.3 kristaps 80: break;
1.56 schwarze 81: case 'u':
82: dst->unit = SCALE_BU;
1.3 kristaps 83: break;
1.48 schwarze 84: case 'v':
1.56 schwarze 85: dst->unit = SCALE_VS;
1.3 kristaps 86: break;
1.48 schwarze 87: case '\0':
1.56 schwarze 88: endptr--;
89: /* FALLTHROUGH */
90: default:
1.5 kristaps 91: if (SCALE_MAX == def)
92: return(0);
1.56 schwarze 93: dst->unit = def;
1.3 kristaps 94: break;
95: }
1.1 kristaps 96:
1.56 schwarze 97: return(*endptr == '\0' ? 2 : 1);
1.8 kristaps 98: }
1.30 kristaps 99:
100: /*
101: * Calculate the abstract widths and decimal positions of columns in a
102: * table. This routine allocates the columns structures then runs over
103: * all rows and cells in the table. The function pointers in "tbl" are
104: * used for the actual width calculations.
105: */
106: void
1.52 schwarze 107: tblcalc(struct rofftbl *tbl, const struct tbl_span *sp,
108: size_t totalwidth)
1.30 kristaps 109: {
1.58 ! schwarze 110: const struct tbl_opts *opts;
1.30 kristaps 111: const struct tbl_dat *dp;
112: struct roffcol *col;
1.52 schwarze 113: size_t ewidth, xwidth;
1.43 schwarze 114: int spans;
1.58 ! schwarze 115: int icol, maxcol, necol, nxcol, quirkcol;
1.30 kristaps 116:
117: /*
118: * Allocate the master column specifiers. These will hold the
119: * widths and decimal positions for all cells in the column. It
120: * must be freed and nullified by the caller.
121: */
122:
123: assert(NULL == tbl->cols);
1.48 schwarze 124: tbl->cols = mandoc_calloc((size_t)sp->opts->cols,
125: sizeof(struct roffcol));
1.58 ! schwarze 126: opts = sp->opts;
1.30 kristaps 127:
1.53 schwarze 128: for (maxcol = -1; sp; sp = sp->next) {
1.30 kristaps 129: if (TBL_SPAN_DATA != sp->pos)
130: continue;
1.43 schwarze 131: spans = 1;
1.30 kristaps 132: /*
133: * Account for the data cells in the layout, matching it
134: * to data cells in the data section.
135: */
136: for (dp = sp->first; dp; dp = dp->next) {
1.43 schwarze 137: /* Do not used spanned cells in the calculation. */
138: if (0 < --spans)
139: continue;
140: spans = dp->spans;
141: if (1 < spans)
142: continue;
1.52 schwarze 143: icol = dp->layout->head->ident;
144: if (maxcol < icol)
145: maxcol = icol;
146: col = tbl->cols + icol;
147: col->flags |= dp->layout->flags;
148: if (dp->layout->flags & TBL_CELL_WIGN)
149: continue;
1.58 ! schwarze 150: tblcalc_data(tbl, col, opts, dp);
1.52 schwarze 151: }
152: }
153:
154: /*
155: * Count columns to equalize and columns to maximize.
156: * Find maximum width of the columns to equalize.
157: * Find total width of the columns *not* to maximize.
158: */
159:
160: necol = nxcol = 0;
161: ewidth = xwidth = 0;
162: for (icol = 0; icol <= maxcol; icol++) {
163: col = tbl->cols + icol;
164: if (col->flags & TBL_CELL_EQUAL) {
165: necol++;
166: if (ewidth < col->width)
167: ewidth = col->width;
168: }
169: if (col->flags & TBL_CELL_WMAX)
170: nxcol++;
171: else
172: xwidth += col->width;
173: }
174:
175: /*
176: * Equalize columns, if requested for any of them.
177: * Update total width of the columns not to maximize.
178: */
179:
180: if (necol) {
181: for (icol = 0; icol <= maxcol; icol++) {
182: col = tbl->cols + icol;
183: if ( ! (col->flags & TBL_CELL_EQUAL))
184: continue;
185: if (col->width == ewidth)
186: continue;
187: if (nxcol && totalwidth)
188: xwidth += ewidth - col->width;
189: col->width = ewidth;
190: }
191: }
192:
193: /*
194: * If there are any columns to maximize, find the total
195: * available width, deducting 3n margins between columns.
196: * Distribute the available width evenly.
197: */
198:
199: if (nxcol && totalwidth) {
1.58 ! schwarze 200: xwidth = totalwidth - xwidth - 3*maxcol -
! 201: (opts->opts & (TBL_OPT_BOX | TBL_OPT_DBOX) ?
! 202: 2 : !!opts->lvert + !!opts->rvert);
! 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;
1.52 schwarze 220: for (icol = 0; icol <= maxcol; icol++) {
221: col = tbl->cols + icol;
222: if ( ! (col->flags & TBL_CELL_WMAX))
223: continue;
1.58 ! schwarze 224: col->width = (double)xwidth * ++necol / nxcol
! 225: - ewidth + 0.4995;
! 226: if (necol == quirkcol)
! 227: col->width--;
! 228: ewidth += col->width;
1.30 kristaps 229: }
230: }
231: }
232:
233: static void
234: tblcalc_data(struct rofftbl *tbl, struct roffcol *col,
1.45 schwarze 235: const struct tbl_opts *opts, const struct tbl_dat *dp)
1.30 kristaps 236: {
237: size_t sz;
238:
239: /* Branch down into data sub-types. */
240:
241: switch (dp->layout->pos) {
1.48 schwarze 242: case TBL_CELL_HORIZ:
1.30 kristaps 243: /* FALLTHROUGH */
1.48 schwarze 244: case TBL_CELL_DHORIZ:
1.30 kristaps 245: sz = (*tbl->len)(1, tbl->arg);
246: if (col->width < sz)
247: col->width = sz;
248: break;
1.48 schwarze 249: case TBL_CELL_LONG:
1.30 kristaps 250: /* FALLTHROUGH */
1.48 schwarze 251: case TBL_CELL_CENTRE:
1.30 kristaps 252: /* FALLTHROUGH */
1.48 schwarze 253: case TBL_CELL_LEFT:
1.30 kristaps 254: /* FALLTHROUGH */
1.48 schwarze 255: case TBL_CELL_RIGHT:
1.30 kristaps 256: tblcalc_literal(tbl, col, dp);
257: break;
1.48 schwarze 258: case TBL_CELL_NUMBER:
1.45 schwarze 259: tblcalc_number(tbl, col, opts, dp);
1.35 kristaps 260: break;
1.48 schwarze 261: case TBL_CELL_DOWN:
1.30 kristaps 262: break;
263: default:
264: abort();
265: /* NOTREACHED */
266: }
267: }
268:
269: static void
270: tblcalc_literal(struct rofftbl *tbl, struct roffcol *col,
271: const struct tbl_dat *dp)
272: {
1.43 schwarze 273: size_t sz;
1.34 kristaps 274: const char *str;
1.30 kristaps 275:
1.34 kristaps 276: str = dp->string ? dp->string : "";
277: sz = (*tbl->slen)(str, tbl->arg);
278:
1.30 kristaps 279: if (col->width < sz)
280: col->width = sz;
281: }
282:
283: static void
284: tblcalc_number(struct rofftbl *tbl, struct roffcol *col,
1.45 schwarze 285: const struct tbl_opts *opts, const struct tbl_dat *dp)
1.30 kristaps 286: {
1.48 schwarze 287: int i;
1.34 kristaps 288: size_t sz, psz, ssz, d;
289: const char *str;
1.30 kristaps 290: char *cp;
291: char buf[2];
292:
293: /*
294: * First calculate number width and decimal place (last + 1 for
1.43 schwarze 295: * non-decimal numbers). If the stored decimal is subsequent to
1.30 kristaps 296: * ours, make our size longer by that difference
297: * (right-"shifting"); similarly, if ours is subsequent the
298: * stored, then extend the stored size by the difference.
299: * Finally, re-assign the stored values.
300: */
301:
1.34 kristaps 302: str = dp->string ? dp->string : "";
303: sz = (*tbl->slen)(str, tbl->arg);
1.30 kristaps 304:
1.34 kristaps 305: /* FIXME: TBL_DATA_HORIZ et al.? */
1.30 kristaps 306:
1.45 schwarze 307: buf[0] = opts->decimal;
1.30 kristaps 308: buf[1] = '\0';
309:
310: psz = (*tbl->slen)(buf, tbl->arg);
311:
1.45 schwarze 312: if (NULL != (cp = strrchr(str, opts->decimal))) {
1.30 kristaps 313: buf[1] = '\0';
314: for (ssz = 0, i = 0; cp != &str[i]; i++) {
315: buf[0] = str[i];
316: ssz += (*tbl->slen)(buf, tbl->arg);
317: }
318: d = ssz + psz;
319: } else
320: d = sz + psz;
321:
322: /* Adjust the settings for this column. */
323:
324: if (col->decimal > d) {
325: sz += col->decimal - d;
326: d = col->decimal;
327: } else
328: col->width += d - col->decimal;
329:
330: if (sz > col->width)
331: col->width = sz;
332: if (d > col->decimal)
333: col->decimal = d;
334: }
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