freebsd-nq/contrib/mdocml/man_html.c
2017-02-19 17:46:37 +00:00

670 lines
13 KiB
C

/* $Id: man_html.c,v 1.133 2017/02/05 18:15:39 schwarze Exp $ */
/*
* Copyright (c) 2008-2012, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
* Copyright (c) 2013, 2014, 2015, 2017 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 "roff.h"
#include "man.h"
#include "out.h"
#include "html.h"
#include "main.h"
/* FIXME: have PD set the default vspace width. */
#define INDENT 5
#define MAN_ARGS const struct roff_meta *man, \
const struct roff_node *n, \
struct html *h
struct htmlman {
int (*pre)(MAN_ARGS);
int (*post)(MAN_ARGS);
};
static void print_bvspace(struct html *,
const struct roff_node *);
static void print_man_head(MAN_ARGS);
static void print_man_nodelist(MAN_ARGS);
static void print_man_node(MAN_ARGS);
static int fillmode(struct html *, int);
static int a2width(const struct roff_node *,
struct roffsu *);
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_UR_pre(MAN_ARGS);
static int man_alt_pre(MAN_ARGS);
static int man_br_pre(MAN_ARGS);
static int man_ign_pre(MAN_ARGS);
static int man_in_pre(MAN_ARGS);
static void man_root_post(MAN_ARGS);
static void man_root_pre(MAN_ARGS);
static const struct htmlman mans[MAN_MAX] = {
{ man_br_pre, NULL }, /* br */
{ NULL, NULL }, /* TH */
{ man_SH_pre, NULL }, /* SH */
{ man_SS_pre, NULL }, /* SS */
{ man_IP_pre, NULL }, /* TP */
{ man_PP_pre, NULL }, /* LP */
{ man_PP_pre, NULL }, /* PP */
{ man_PP_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 */
{ man_br_pre, NULL }, /* sp */
{ NULL, NULL }, /* nf */
{ NULL, NULL }, /* fi */
{ 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_ign_pre, NULL }, /* ft */
{ man_OP_pre, NULL }, /* OP */
{ NULL, NULL }, /* EX */
{ NULL, NULL }, /* EE */
{ man_UR_pre, NULL }, /* UR */
{ NULL, NULL }, /* UE */
{ man_ign_pre, NULL }, /* ll */
};
/*
* 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_man *man)
{
struct html *h;
struct tag *t;
h = (struct html *)arg;
if ((h->oflags & HTML_FRAGMENT) == 0) {
print_gen_decls(h);
print_otag(h, TAG_HTML, "");
t = print_otag(h, TAG_HEAD, "");
print_man_head(&man->meta, man->first, h);
print_tagq(h, t);
print_otag(h, TAG_BODY, "");
}
man_root_pre(&man->meta, man->first, h);
t = print_otag(h, TAG_DIV, "c", "manual-text");
print_man_nodelist(&man->meta, man->first->child, h);
print_tagq(h, t);
man_root_post(&man->meta, man->first, h);
print_tagq(h, NULL);
}
static void
print_man_head(MAN_ARGS)
{
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)
{
static int want_fillmode = MAN_fi;
static int save_fillmode;
struct tag *t;
int child;
/*
* Handle fill mode switch requests up front,
* they would just cause trouble in the subsequent code.
*/
switch (n->tok) {
case MAN_nf:
case MAN_EX:
want_fillmode = MAN_nf;
return;
case MAN_fi:
case MAN_EE:
want_fillmode = MAN_fi;
if (fillmode(h, 0) == MAN_fi)
print_otag(h, TAG_BR, "");
return;
default:
break;
}
/* Set up fill mode for the upcoming node. */
switch (n->type) {
case ROFFT_BLOCK:
save_fillmode = 0;
/* Some block macros suspend or cancel .nf. */
switch (n->tok) {
case MAN_TP: /* Tagged paragraphs */
case MAN_IP: /* temporarily disable .nf */
case MAN_HP: /* for the head. */
save_fillmode = want_fillmode;
/* FALLTHROUGH */
case MAN_SH: /* Section headers */
case MAN_SS: /* permanently cancel .nf. */
want_fillmode = MAN_fi;
/* FALLTHROUGH */
case MAN_PP: /* These have no head. */
case MAN_LP: /* They will simply */
case MAN_P: /* reopen .nf in the body. */
case MAN_RS:
case MAN_UR:
fillmode(h, MAN_fi);
break;
default:
break;
}
break;
case ROFFT_TBL:
fillmode(h, MAN_fi);
break;
case ROFFT_ELEM:
/*
* Some in-line macros produce tags and/or text
* in the handler, so they require fill mode to be
* configured up front just like for text nodes.
* For the others, keep the traditional approach
* of doing the same, for now.
*/
fillmode(h, want_fillmode);
break;
case ROFFT_TEXT:
if (fillmode(h, want_fillmode) == MAN_fi &&
want_fillmode == MAN_fi &&
n->flags & NODE_LINE && *n->string == ' ')
print_otag(h, TAG_BR, "");
if (*n->string != '\0')
break;
print_paragraph(h);
return;
default:
break;
}
/* Produce output for this node. */
child = 1;
switch (n->type) {
case ROFFT_TEXT:
t = h->tag;
print_text(h, n->string);
break;
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 (mans[n->tok].pre)
child = (*mans[n->tok].pre)(man, n, h);
/* Some block macros resume .nf in the body. */
if (save_fillmode && n->type == ROFFT_BODY)
want_fillmode = save_fillmode;
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 (fillmode(h, 0) == MAN_nf &&
n->next != NULL && n->next->flags & NODE_LINE)
print_endline(h);
}
/*
* MAN_nf switches to no-fill mode, MAN_fi to fill mode.
* Other arguments do not switch.
* The old mode is returned.
*/
static int
fillmode(struct html *h, int want)
{
struct tag *pre;
int had;
for (pre = h->tag; pre != NULL; pre = pre->next)
if (pre->tag == TAG_PRE)
break;
had = pre == NULL ? MAN_fi : MAN_nf;
if (want && want != had) {
if (want == MAN_nf)
print_otag(h, TAG_PRE, "");
else
print_tagq(h, pre);
}
return had;
}
static int
a2width(const struct roff_node *n, struct roffsu *su)
{
if (n->type != ROFFT_TEXT)
return 0;
if (a2roffsu(n->string, su, SCALE_EN))
return 1;
return 0;
}
static void
man_root_pre(MAN_ARGS)
{
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(MAN_ARGS)
{
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_br_pre(MAN_ARGS)
{
struct roffsu su;
SCALE_VS_INIT(&su, 1);
if (MAN_sp == n->tok) {
if (NULL != (n = n->child))
if ( ! a2roffsu(n->string, &su, SCALE_VS))
su.scale = 1.0;
} else
su.scale = 0.0;
print_otag(h, TAG_DIV, "suh", &su);
/* So the div isn't empty: */
print_text(h, "\\~");
return 0;
}
static int
man_SH_pre(MAN_ARGS)
{
if (n->type == ROFFT_HEAD)
print_otag(h, TAG_H1, "c", "Sh");
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)
{
if (n->type == ROFFT_HEAD)
print_otag(h, TAG_H2, "c", "Ss");
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, "c", "It-tag");
return 1;
} else if (n->type != ROFFT_HEAD) {
print_otag(h, TAG_DL, "c", "Bl-tag");
return 1;
}
/* FIXME: width specification. */
print_otag(h, TAG_DT, "c", "It-tag");
/* For IP, only print the first header element. */
if (MAN_IP == n->tok && n->child)
print_man_node(man, n->child, h);
/* For TP, only print next-line header elements. */
if (MAN_TP == n->tok) {
nn = n->child;
while (NULL != nn && 0 == (NODE_LINE & nn->flags))
nn = nn->next;
while (NULL != nn) {
print_man_node(man, nn, h);
nn = nn->next;
}
}
return 0;
}
static int
man_HP_pre(MAN_ARGS)
{
struct roffsu sum, sui;
const struct roff_node *np;
if (n->type == ROFFT_HEAD)
return 0;
else if (n->type != ROFFT_BLOCK)
return 1;
np = n->head->child;
if (np == NULL || !a2width(np, &sum))
SCALE_HS_INIT(&sum, INDENT);
sui.unit = sum.unit;
sui.scale = -sum.scale;
print_bvspace(h, n);
print_otag(h, TAG_DIV, "csului", "Pp", &sum, &sui);
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)
{
struct roffsu su;
if (n->type == ROFFT_HEAD)
return 0;
else if (n->type == ROFFT_BODY)
return 1;
SCALE_HS_INIT(&su, INDENT);
if (n->head->child)
a2width(n->head->child, &su);
print_otag(h, TAG_DIV, "sul", &su);
return 1;
}
static int
man_UR_pre(MAN_ARGS)
{
n = n->child;
assert(n->type == ROFFT_HEAD);
if (n->child != NULL) {
assert(n->child->type == ROFFT_TEXT);
print_otag(h, TAG_A, "ch", "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;
}