Return to man_html.c CVS log

Up to [cvsweb.bsd.lv] / mandoc

Now that the NODE_NOFILL flag in the syntax tree is accurate,
use it in the man(7) HTML formatter rather than keeping fill mode
state locally, resulting in massive simplification (minus 40 LOC).

Move the html_fillmode() state handler function to the html.c module
such that both the man(7) and the roff(7) formatter (and in the future,
also the mdoc(7) formatter) can use it.  Give it a query mode, to be
invoked with TOKEN_NONE.

/*	$Id: man_html.c,v 1.163 2019/01/05 09:14:44 schwarze Exp $ */
/*
 * Copyright (c) 2008-2012, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
 * Copyright (c) 2013-2015, 2017-2019 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 AUTHORS DISCLAIM ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS 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 <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "mandoc_aux.h"
#include "mandoc.h"
#include "roff.h"
#include "man.h"
#include "out.h"
#include "html.h"
#include "main.h"

/* FIXME: have PD set the default vspace width. */

#define	MAN_ARGS	  const struct roff_meta *man, \
			  const struct roff_node *n, \
			  struct html *h

struct	man_html_act {
	int		(*pre)(MAN_ARGS);
	int		(*post)(MAN_ARGS);
};

static	void		  print_bvspace(struct html *,
				const struct roff_node *);
static	void		  print_man_head(const struct roff_meta *,
				struct html *);
static	void		  print_man_nodelist(MAN_ARGS);
static	void		  print_man_node(MAN_ARGS);
static	int		  man_B_pre(MAN_ARGS);
static	int		  man_HP_pre(MAN_ARGS);
static	int		  man_IP_pre(MAN_ARGS);
static	int		  man_I_pre(MAN_ARGS);
static	int		  man_OP_pre(MAN_ARGS);
static	int		  man_PP_pre(MAN_ARGS);
static	int		  man_RS_pre(MAN_ARGS);
static	int		  man_SH_pre(MAN_ARGS);
static	int		  man_SM_pre(MAN_ARGS);
static	int		  man_SS_pre(MAN_ARGS);
static	int		  man_SY_pre(MAN_ARGS);
static	int		  man_UR_pre(MAN_ARGS);
static	int		  man_abort_pre(MAN_ARGS);
static	int		  man_alt_pre(MAN_ARGS);
static	int		  man_ign_pre(MAN_ARGS);
static	int		  man_in_pre(MAN_ARGS);
static	void		  man_root_post(const struct roff_meta *,
				struct html *);
static	void		  man_root_pre(const struct roff_meta *,
				struct html *);

static	const struct man_html_act man_html_acts[MAN_MAX - MAN_TH] = {
	{ NULL, NULL }, /* TH */
	{ man_SH_pre, NULL }, /* SH */
	{ man_SS_pre, NULL }, /* SS */
	{ man_IP_pre, NULL }, /* TP */
	{ man_IP_pre, NULL }, /* TQ */
	{ man_abort_pre, NULL }, /* LP */
	{ man_PP_pre, NULL }, /* PP */
	{ man_abort_pre, NULL }, /* P */
	{ man_IP_pre, NULL }, /* IP */
	{ man_HP_pre, NULL }, /* HP */
	{ man_SM_pre, NULL }, /* SM */
	{ man_SM_pre, NULL }, /* SB */
	{ man_alt_pre, NULL }, /* BI */
	{ man_alt_pre, NULL }, /* IB */
	{ man_alt_pre, NULL }, /* BR */
	{ man_alt_pre, NULL }, /* RB */
	{ NULL, NULL }, /* R */
	{ man_B_pre, NULL }, /* B */
	{ man_I_pre, NULL }, /* I */
	{ man_alt_pre, NULL }, /* IR */
	{ man_alt_pre, NULL }, /* RI */
	{ NULL, NULL }, /* RE */
	{ man_RS_pre, NULL }, /* RS */
	{ man_ign_pre, NULL }, /* DT */
	{ man_ign_pre, NULL }, /* UC */
	{ man_ign_pre, NULL }, /* PD */
	{ man_ign_pre, NULL }, /* AT */
	{ man_in_pre, NULL }, /* in */
	{ man_SY_pre, NULL }, /* SY */
	{ NULL, NULL }, /* YS */
	{ man_OP_pre, NULL }, /* OP */
	{ NULL, NULL }, /* EX */
	{ NULL, NULL }, /* EE */
	{ man_UR_pre, NULL }, /* UR */
	{ NULL, NULL }, /* UE */
	{ man_UR_pre, NULL }, /* MT */
	{ NULL, NULL }, /* ME */
};


/*
 * Printing leading vertical space before a block.
 * This is used for the paragraph macros.
 * The rules are pretty simple, since there's very little nesting going
 * on here.  Basically, if we're the first within another block (SS/SH),
 * then don't emit vertical space.  If we are (RS), then do.  If not the
 * first, print it.
 */
static void
print_bvspace(struct html *h, const struct roff_node *n)
{

	if (n->body && n->body->child)
		if (n->body->child->type == ROFFT_TBL)
			return;

	if (n->parent->type == ROFFT_ROOT || n->parent->tok != MAN_RS)
		if (NULL == n->prev)
			return;

	print_paragraph(h);
}

void
html_man(void *arg, const struct roff_meta *man)
{
	struct html		*h;
	struct roff_node	*n;
	struct tag		*t;

	h = (struct html *)arg;
	n = man->first->child;

	if ((h->oflags & HTML_FRAGMENT) == 0) {
		print_gen_decls(h);
		print_otag(h, TAG_HTML, "");
		if (n->type == ROFFT_COMMENT)
			print_gen_comment(h, n);
		t = print_otag(h, TAG_HEAD, "");
		print_man_head(man, h);
		print_tagq(h, t);
		print_otag(h, TAG_BODY, "");
	}

	man_root_pre(man, h);
	t = print_otag(h, TAG_DIV, "c", "manual-text");
	print_man_nodelist(man, n, h);
	print_tagq(h, t);
	man_root_post(man, h);
	print_tagq(h, NULL);
}

static void
print_man_head(const struct roff_meta *man, struct html *h)
{
	char	*cp;

	print_gen_head(h);
	mandoc_asprintf(&cp, "%s(%s)", man->title, man->msec);
	print_otag(h, TAG_TITLE, "");
	print_text(h, cp);
	free(cp);
}

static void
print_man_nodelist(MAN_ARGS)
{

	while (n != NULL) {
		print_man_node(man, n, h);
		n = n->next;
	}
}

static void
print_man_node(MAN_ARGS)
{
	struct tag	*t;
	int		 child;

	html_fillmode(h, n->flags & NODE_NOFILL ? ROFF_nf : ROFF_fi);

	child = 1;
	switch (n->type) {
	case ROFFT_TEXT:
		if (*n->string == '\0') {
			print_endline(h);
			return;
		}
		t = h->tag;
		if (*n->string == ' ' && n->flags & NODE_LINE &&
		    (h->flags & HTML_NONEWLINE) == 0)
			print_endline(h);
		else if (n->flags & NODE_DELIMC)
			h->flags |= HTML_NOSPACE;
		print_text(h, n->string);
		break;
	case ROFFT_COMMENT:
		return;
	case ROFFT_EQN:
		t = h->tag;
		print_eqn(h, n->eqn);
		break;
	case ROFFT_TBL:
		/*
		 * This will take care of initialising all of the table
		 * state data for the first table, then tearing it down
		 * for the last one.
		 */
		print_tbl(h, n->span);
		return;
	default:
		/*
		 * Close out scope of font prior to opening a macro
		 * scope.
		 */
		if (HTMLFONT_NONE != h->metac) {
			h->metal = h->metac;
			h->metac = HTMLFONT_NONE;
		}

		/*
		 * Close out the current table, if it's open, and unset
		 * the "meta" table state.  This will be reopened on the
		 * next table element.
		 */
		if (h->tblt)
			print_tblclose(h);

		t = h->tag;
		if (n->tok < ROFF_MAX) {
			roff_html_pre(h, n);
			print_stagq(h, t);
			return;
		}

		assert(n->tok >= MAN_TH && n->tok < MAN_MAX);
		if (man_html_acts[n->tok - MAN_TH].pre != NULL)
			child = (*man_html_acts[n->tok - MAN_TH].pre)(man,
			    n, h);
		break;
	}

	if (child && n->child)
		print_man_nodelist(man, n->child, h);

	/* This will automatically close out any font scope. */
	print_stagq(h, t);

	if (n->flags & NODE_NOFILL &&
	    (n->next == NULL || n->next->flags & NODE_LINE)) {
		/* In .nf = <pre>, print even empty lines. */
		h->col++;
		print_endline(h);
	}
}

static void
man_root_pre(const struct roff_meta *man, struct html *h)
{
	struct tag	*t, *tt;
	char		*title;

	assert(man->title);
	assert(man->msec);
	mandoc_asprintf(&title, "%s(%s)", man->title, man->msec);

	t = print_otag(h, TAG_TABLE, "c", "head");
	tt = print_otag(h, TAG_TR, "");

	print_otag(h, TAG_TD, "c", "head-ltitle");
	print_text(h, title);
	print_stagq(h, tt);

	print_otag(h, TAG_TD, "c", "head-vol");
	if (NULL != man->vol)
		print_text(h, man->vol);
	print_stagq(h, tt);

	print_otag(h, TAG_TD, "c", "head-rtitle");
	print_text(h, title);
	print_tagq(h, t);
	free(title);
}

static void
man_root_post(const struct roff_meta *man, struct html *h)
{
	struct tag	*t, *tt;

	t = print_otag(h, TAG_TABLE, "c", "foot");
	tt = print_otag(h, TAG_TR, "");

	print_otag(h, TAG_TD, "c", "foot-date");
	print_text(h, man->date);
	print_stagq(h, tt);

	print_otag(h, TAG_TD, "c", "foot-os");
	if (man->os)
		print_text(h, man->os);
	print_tagq(h, t);
}

static int
man_SH_pre(MAN_ARGS)
{
	char	*id;

	if (n->type == ROFFT_HEAD) {
		id = html_make_id(n, 1);
		print_otag(h, TAG_H1, "cTi", "Sh", id);
		if (id != NULL)
			print_otag(h, TAG_A, "chR", "permalink", id);
	}
	return 1;
}

static int
man_alt_pre(MAN_ARGS)
{
	const struct roff_node	*nn;
	int		 i;
	enum htmltag	 fp;
	struct tag	*t;

	for (i = 0, nn = n->child; nn; nn = nn->next, i++) {
		switch (n->tok) {
		case MAN_BI:
			fp = i % 2 ? TAG_I : TAG_B;
			break;
		case MAN_IB:
			fp = i % 2 ? TAG_B : TAG_I;
			break;
		case MAN_RI:
			fp = i % 2 ? TAG_I : TAG_MAX;
			break;
		case MAN_IR:
			fp = i % 2 ? TAG_MAX : TAG_I;
			break;
		case MAN_BR:
			fp = i % 2 ? TAG_MAX : TAG_B;
			break;
		case MAN_RB:
			fp = i % 2 ? TAG_B : TAG_MAX;
			break;
		default:
			abort();
		}

		if (i)
			h->flags |= HTML_NOSPACE;

		if (fp != TAG_MAX)
			t = print_otag(h, fp, "");

		print_text(h, nn->string);

		if (fp != TAG_MAX)
			print_tagq(h, t);
	}
	return 0;
}

static int
man_SM_pre(MAN_ARGS)
{
	print_otag(h, TAG_SMALL, "");
	if (MAN_SB == n->tok)
		print_otag(h, TAG_B, "");
	return 1;
}

static int
man_SS_pre(MAN_ARGS)
{
	char	*id;

	if (n->type == ROFFT_HEAD) {
		id = html_make_id(n, 1);
		print_otag(h, TAG_H2, "cTi", "Ss", id);
		if (id != NULL)
			print_otag(h, TAG_A, "chR", "permalink", id);
	}
	return 1;
}

static int
man_PP_pre(MAN_ARGS)
{

	if (n->type == ROFFT_HEAD)
		return 0;
	else if (n->type == ROFFT_BLOCK)
		print_bvspace(h, n);

	return 1;
}

static int
man_IP_pre(MAN_ARGS)
{
	const struct roff_node	*nn;

	if (n->type == ROFFT_BODY) {
		print_otag(h, TAG_DD, "");
		return 1;
	} else if (n->type != ROFFT_HEAD) {
		print_otag(h, TAG_DL, "c", "Bl-tag");
		return 1;
	}

	print_otag(h, TAG_DT, "");

	switch(n->tok) {
	case MAN_IP:  /* Only print the first header element. */
		if (n->child != NULL)
			print_man_node(man, n->child, h);
		break;
	case MAN_TP:  /* Only print next-line header elements. */
	case MAN_TQ:
		nn = n->child;
		while (nn != NULL && (NODE_LINE & nn->flags) == 0)
			nn = nn->next;
		while (nn != NULL) {
			print_man_node(man, nn, h);
			nn = nn->next;
		}
		break;
	default:
		abort();
	}

	return 0;
}

static int
man_HP_pre(MAN_ARGS)
{
	if (n->type == ROFFT_HEAD)
		return 0;

	if (n->type == ROFFT_BLOCK) {
		print_bvspace(h, n);
		print_otag(h, TAG_DIV, "c", "HP");
	}
	return 1;
}

static int
man_OP_pre(MAN_ARGS)
{
	struct tag	*tt;

	print_text(h, "[");
	h->flags |= HTML_NOSPACE;
	tt = print_otag(h, TAG_SPAN, "c", "Op");

	if (NULL != (n = n->child)) {
		print_otag(h, TAG_B, "");
		print_text(h, n->string);
	}

	print_stagq(h, tt);

	if (NULL != n && NULL != n->next) {
		print_otag(h, TAG_I, "");
		print_text(h, n->next->string);
	}

	print_stagq(h, tt);
	h->flags |= HTML_NOSPACE;
	print_text(h, "]");
	return 0;
}

static int
man_B_pre(MAN_ARGS)
{
	print_otag(h, TAG_B, "");
	return 1;
}

static int
man_I_pre(MAN_ARGS)
{
	print_otag(h, TAG_I, "");
	return 1;
}

static int
man_in_pre(MAN_ARGS)
{
	print_otag(h, TAG_BR, "");
	return 0;
}

static int
man_ign_pre(MAN_ARGS)
{

	return 0;
}

static int
man_RS_pre(MAN_ARGS)
{
	if (n->type == ROFFT_HEAD)
		return 0;
	if (n->type == ROFFT_BLOCK)
		print_otag(h, TAG_DIV, "c", "Bd-indent");
	return 1;
}

static int
man_SY_pre(MAN_ARGS)
{
	switch (n->type) {
	case ROFFT_BLOCK:
		print_otag(h, TAG_TABLE, "c", "Nm");
		print_otag(h, TAG_TR, "");
		break;
	case ROFFT_HEAD:
		print_otag(h, TAG_TD, "");
		print_otag(h, TAG_CODE, "cT", "Nm");
		break;
	case ROFFT_BODY:
		print_otag(h, TAG_TD, "");
		break;
	default:
		abort();
	}
	return 1;
}

static int
man_UR_pre(MAN_ARGS)
{
	char *cp;
	n = n->child;
	assert(n->type == ROFFT_HEAD);
	if (n->child != NULL) {
		assert(n->child->type == ROFFT_TEXT);
		if (n->tok == MAN_MT) {
			mandoc_asprintf(&cp, "mailto:%s", n->child->string);
			print_otag(h, TAG_A, "cTh", "Mt", cp);
			free(cp);
		} else
			print_otag(h, TAG_A, "cTh", "Lk", n->child->string);
	}

	assert(n->next->type == ROFFT_BODY);
	if (n->next->child != NULL)
		n = n->next;

	print_man_nodelist(man, n->child, h);

	return 0;
}

static int
man_abort_pre(MAN_ARGS)
{
	abort();
}