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Revision 1.26, Sun Nov 25 19:24:20 2018 UTC (2 years, 3 months ago) by schwarze
Branch: MAIN
Changes since 1.25: +40 -17 lines

In tbl(7) -T html output,
span cells horizontally and vertically as requested by the layout.
Does not handle spans requested in the data section yet.

To be able to do this, record the number of rows spanned
in the first data cell (struct tbl_dat) of a vertical span.

Missing feature reported by Pali dot Rohar at gmail dot com.

/*	$Id: tbl_html.c,v 1.26 2018/11/25 19:24:20 schwarze Exp $ */
/*
 * Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv>
 * Copyright (c) 2014, 2015, 2017, 2018 Ingo Schwarze <schwarze@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
#include "config.h"

#include <sys/types.h>

#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "mandoc.h"
#include "out.h"
#include "html.h"

static	void	 html_tblopen(struct html *, const struct tbl_span *);
static	size_t	 html_tbl_len(size_t, void *);
static	size_t	 html_tbl_strlen(const char *, void *);
static	size_t	 html_tbl_sulen(const struct roffsu *, void *);


static size_t
html_tbl_len(size_t sz, void *arg)
{
	return sz;
}

static size_t
html_tbl_strlen(const char *p, void *arg)
{
	return strlen(p);
}

static size_t
html_tbl_sulen(const struct roffsu *su, void *arg)
{
	if (su->scale < 0.0)
		return 0;

	switch (su->unit) {
	case SCALE_FS:  /* 2^16 basic units */
		return su->scale * 65536.0 / 24.0;
	case SCALE_IN:  /* 10 characters per inch */
		return su->scale * 10.0;
	case SCALE_CM:  /* 2.54 cm per inch */
		return su->scale * 10.0 / 2.54;
	case SCALE_PC:  /* 6 pica per inch */
	case SCALE_VS:
		return su->scale * 10.0 / 6.0;
	case SCALE_EN:
	case SCALE_EM:
		return su->scale;
	case SCALE_PT:  /* 12 points per pica */
		return su->scale * 10.0 / 6.0 / 12.0;
	case SCALE_BU:  /* 24 basic units per character */
		return su->scale / 24.0;
	case SCALE_MM:  /* 1/1000 inch */
		return su->scale / 100.0;
	default:
		abort();
	}
}

static void
html_tblopen(struct html *h, const struct tbl_span *sp)
{
	if (h->tbl.cols == NULL) {
		h->tbl.len = html_tbl_len;
		h->tbl.slen = html_tbl_strlen;
		h->tbl.sulen = html_tbl_sulen;
		tblcalc(&h->tbl, sp, 0, 0);
	}
	assert(NULL == h->tblt);
	h->tblt = print_otag(h, TAG_TABLE, "c", "tbl");
}

void
print_tblclose(struct html *h)
{

	assert(h->tblt);
	print_tagq(h, h->tblt);
	h->tblt = NULL;
}

void
print_tbl(struct html *h, const struct tbl_span *sp)
{
	const struct tbl_dat	*dp;
	struct tag		*tt;
	const char		*hspans, *vspans, *halign, *valign;
	char			 hbuf[4], vbuf[4];

	/* Inhibit printing of spaces: we do padding ourselves. */

	if (h->tblt == NULL)
		html_tblopen(h, sp);

	assert(h->tblt);

	h->flags |= HTML_NONOSPACE;
	h->flags |= HTML_NOSPACE;

	tt = print_otag(h, TAG_TR, "");

	switch (sp->pos) {
	case TBL_SPAN_HORIZ:
	case TBL_SPAN_DHORIZ:
		print_otag(h, TAG_TD, "?", "colspan", "0");
		break;
	default:
		for (dp = sp->first; dp != NULL; dp = dp->next) {
			print_stagq(h, tt);
			switch (dp->layout->pos) {
			case TBL_CELL_SPAN:
			case TBL_CELL_DOWN:
				continue;
			default:
				break;
			}

			/* Determine the attribute values. */

			if (dp->hspans > 0) {
				(void)snprintf(hbuf, sizeof(hbuf),
				    "%d", dp->hspans + 1);
				hspans = hbuf;
			} else
				hspans = NULL;
			if (dp->vspans > 0) {
				(void)snprintf(vbuf, sizeof(vbuf),
				    "%d", dp->vspans + 1);
				vspans = vbuf;
			} else
				vspans = NULL;

			switch (dp->layout->pos) {
			case TBL_CELL_CENTRE:
				halign = "center";
				break;
			case TBL_CELL_RIGHT:
			case TBL_CELL_NUMBER:
				halign = "right";
				break;
			default:
				halign = NULL;
				break;
			}
			if (dp->layout->flags & TBL_CELL_TALIGN)
				valign = "top";
			else if (dp->layout->flags & TBL_CELL_BALIGN)
				valign = "bottom";
			else
				valign = NULL;

			/* Print the element and the attributes. */

			if (halign == NULL && valign == NULL)
				print_otag(h, TAG_TD, "??",
				    "colspan", hspans, "rowspan", vspans);
			else if (halign == NULL)
				print_otag(h, TAG_TD, "??s",
				    "colspan", hspans, "rowspan", vspans,
				    "vertical-align", valign);
			else if (valign == NULL)
				print_otag(h, TAG_TD, "??s",
				    "colspan", hspans, "rowspan", vspans,
				    "text-align", halign);
			else
				print_otag(h, TAG_TD, "??ss",
				    "colspan", hspans, "rowspan", vspans,
				    "vertical-align", valign,
				    "text-align", halign);
			if (dp->string != NULL)
				print_text(h, dp->string);
		}
		break;
	}

	print_tagq(h, tt);

	h->flags &= ~HTML_NONOSPACE;

	if (sp->next == NULL) {
		assert(h->tbl.cols);
		free(h->tbl.cols);
		h->tbl.cols = NULL;
		print_tblclose(h);
	}
}