1/*	$Id: out.c,v 1.43 2011/09/20 23:05:49 schwarze Exp $ */
2/*
3 * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
4 * Copyright (c) 2011 Ingo Schwarze <schwarze@openbsd.org>
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#ifdef HAVE_CONFIG_H
19#include "config.h"
20#endif
21
22#include <sys/types.h>
23
24#include <assert.h>
25#include <ctype.h>
26#include <stdio.h>
27#include <stdlib.h>
28#include <string.h>
29#include <time.h>
30
31#include "mandoc.h"
32#include "out.h"
33
34static	void	tblcalc_data(struct rofftbl *, struct roffcol *,
35			const struct tbl *, const struct tbl_dat *);
36static	void	tblcalc_literal(struct rofftbl *, struct roffcol *,
37			const struct tbl_dat *);
38static	void	tblcalc_number(struct rofftbl *, struct roffcol *,
39			const struct tbl *, const struct tbl_dat *);
40
41/*
42 * Convert a `scaling unit' to a consistent form, or fail.  Scaling
43 * units are documented in groff.7, mdoc.7, man.7.
44 */
45int
46a2roffsu(const char *src, struct roffsu *dst, enum roffscale def)
47{
48	char		 buf[BUFSIZ], hasd;
49	int		 i;
50	enum roffscale	 unit;
51
52	if ('\0' == *src)
53		return(0);
54
55	i = hasd = 0;
56
57	switch (*src) {
58	case ('+'):
59		src++;
60		break;
61	case ('-'):
62		buf[i++] = *src++;
63		break;
64	default:
65		break;
66	}
67
68	if ('\0' == *src)
69		return(0);
70
71	while (i < BUFSIZ) {
72		if ( ! isdigit((unsigned char)*src)) {
73			if ('.' != *src)
74				break;
75			else if (hasd)
76				break;
77			else
78				hasd = 1;
79		}
80		buf[i++] = *src++;
81	}
82
83	if (BUFSIZ == i || (*src && *(src + 1)))
84		return(0);
85
86	buf[i] = '\0';
87
88	switch (*src) {
89	case ('c'):
90		unit = SCALE_CM;
91		break;
92	case ('i'):
93		unit = SCALE_IN;
94		break;
95	case ('P'):
96		unit = SCALE_PC;
97		break;
98	case ('p'):
99		unit = SCALE_PT;
100		break;
101	case ('f'):
102		unit = SCALE_FS;
103		break;
104	case ('v'):
105		unit = SCALE_VS;
106		break;
107	case ('m'):
108		unit = SCALE_EM;
109		break;
110	case ('\0'):
111		if (SCALE_MAX == def)
112			return(0);
113		unit = SCALE_BU;
114		break;
115	case ('u'):
116		unit = SCALE_BU;
117		break;
118	case ('M'):
119		unit = SCALE_MM;
120		break;
121	case ('n'):
122		unit = SCALE_EN;
123		break;
124	default:
125		return(0);
126	}
127
128	/* FIXME: do this in the caller. */
129	if ((dst->scale = atof(buf)) < 0)
130		dst->scale = 0;
131	dst->unit = unit;
132	return(1);
133}
134
135/*
136 * Calculate the abstract widths and decimal positions of columns in a
137 * table.  This routine allocates the columns structures then runs over
138 * all rows and cells in the table.  The function pointers in "tbl" are
139 * used for the actual width calculations.
140 */
141void
142tblcalc(struct rofftbl *tbl, const struct tbl_span *sp)
143{
144	const struct tbl_dat	*dp;
145	const struct tbl_head	*hp;
146	struct roffcol		*col;
147	int			 spans;
148
149	/*
150	 * Allocate the master column specifiers.  These will hold the
151	 * widths and decimal positions for all cells in the column.  It
152	 * must be freed and nullified by the caller.
153	 */
154
155	assert(NULL == tbl->cols);
156	tbl->cols = mandoc_calloc
157		((size_t)sp->tbl->cols, sizeof(struct roffcol));
158
159	hp = sp->head;
160
161	for ( ; sp; sp = sp->next) {
162		if (TBL_SPAN_DATA != sp->pos)
163			continue;
164		spans = 1;
165		/*
166		 * Account for the data cells in the layout, matching it
167		 * to data cells in the data section.
168		 */
169		for (dp = sp->first; dp; dp = dp->next) {
170			/* Do not used spanned cells in the calculation. */
171			if (0 < --spans)
172				continue;
173			spans = dp->spans;
174			if (1 < spans)
175				continue;
176			assert(dp->layout);
177			col = &tbl->cols[dp->layout->head->ident];
178			tblcalc_data(tbl, col, sp->tbl, dp);
179		}
180	}
181
182	/*
183	 * Calculate width of the spanners.  These get one space for a
184	 * vertical line, two for a double-vertical line.
185	 */
186
187	for ( ; hp; hp = hp->next) {
188		col = &tbl->cols[hp->ident];
189		switch (hp->pos) {
190		case (TBL_HEAD_VERT):
191			col->width = (*tbl->len)(1, tbl->arg);
192			break;
193		case (TBL_HEAD_DVERT):
194			col->width = (*tbl->len)(2, tbl->arg);
195			break;
196		default:
197			break;
198		}
199	}
200}
201
202static void
203tblcalc_data(struct rofftbl *tbl, struct roffcol *col,
204		const struct tbl *tp, const struct tbl_dat *dp)
205{
206	size_t		 sz;
207
208	/* Branch down into data sub-types. */
209
210	switch (dp->layout->pos) {
211	case (TBL_CELL_HORIZ):
212		/* FALLTHROUGH */
213	case (TBL_CELL_DHORIZ):
214		sz = (*tbl->len)(1, tbl->arg);
215		if (col->width < sz)
216			col->width = sz;
217		break;
218	case (TBL_CELL_LONG):
219		/* FALLTHROUGH */
220	case (TBL_CELL_CENTRE):
221		/* FALLTHROUGH */
222	case (TBL_CELL_LEFT):
223		/* FALLTHROUGH */
224	case (TBL_CELL_RIGHT):
225		tblcalc_literal(tbl, col, dp);
226		break;
227	case (TBL_CELL_NUMBER):
228		tblcalc_number(tbl, col, tp, dp);
229		break;
230	case (TBL_CELL_DOWN):
231		break;
232	default:
233		abort();
234		/* NOTREACHED */
235	}
236}
237
238static void
239tblcalc_literal(struct rofftbl *tbl, struct roffcol *col,
240		const struct tbl_dat *dp)
241{
242	size_t		 sz;
243	const char	*str;
244
245	str = dp->string ? dp->string : "";
246	sz = (*tbl->slen)(str, tbl->arg);
247
248	if (col->width < sz)
249		col->width = sz;
250}
251
252static void
253tblcalc_number(struct rofftbl *tbl, struct roffcol *col,
254		const struct tbl *tp, const struct tbl_dat *dp)
255{
256	int 		 i;
257	size_t		 sz, psz, ssz, d;
258	const char	*str;
259	char		*cp;
260	char		 buf[2];
261
262	/*
263	 * First calculate number width and decimal place (last + 1 for
264	 * non-decimal numbers).  If the stored decimal is subsequent to
265	 * ours, make our size longer by that difference
266	 * (right-"shifting"); similarly, if ours is subsequent the
267	 * stored, then extend the stored size by the difference.
268	 * Finally, re-assign the stored values.
269	 */
270
271	str = dp->string ? dp->string : "";
272	sz = (*tbl->slen)(str, tbl->arg);
273
274	/* FIXME: TBL_DATA_HORIZ et al.? */
275
276	buf[0] = tp->decimal;
277	buf[1] = '\0';
278
279	psz = (*tbl->slen)(buf, tbl->arg);
280
281	if (NULL != (cp = strrchr(str, tp->decimal))) {
282		buf[1] = '\0';
283		for (ssz = 0, i = 0; cp != &str[i]; i++) {
284			buf[0] = str[i];
285			ssz += (*tbl->slen)(buf, tbl->arg);
286		}
287		d = ssz + psz;
288	} else
289		d = sz + psz;
290
291	/* Adjust the settings for this column. */
292
293	if (col->decimal > d) {
294		sz += col->decimal - d;
295		d = col->decimal;
296	} else
297		col->width += d - col->decimal;
298
299	if (sz > col->width)
300		col->width = sz;
301	if (d > col->decimal)
302		col->decimal = d;
303}
304