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760 lines
15 KiB
C
760 lines
15 KiB
C
/* $Id: html.c,v 1.183 2014/12/02 10:08:06 schwarze Exp $ */
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/*
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* Copyright (c) 2008-2011, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
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* Copyright (c) 2011, 2012, 2013, 2014 Ingo Schwarze <schwarze@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "config.h"
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#include <sys/types.h>
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#include <assert.h>
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#include <ctype.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "mandoc.h"
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#include "mandoc_aux.h"
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#include "out.h"
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#include "html.h"
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#include "main.h"
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struct htmldata {
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const char *name;
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int flags;
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#define HTML_CLRLINE (1 << 0)
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#define HTML_NOSTACK (1 << 1)
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#define HTML_AUTOCLOSE (1 << 2) /* Tag has auto-closure. */
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};
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static const struct htmldata htmltags[TAG_MAX] = {
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{"html", HTML_CLRLINE}, /* TAG_HTML */
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{"head", HTML_CLRLINE}, /* TAG_HEAD */
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{"body", HTML_CLRLINE}, /* TAG_BODY */
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{"meta", HTML_CLRLINE | HTML_NOSTACK | HTML_AUTOCLOSE}, /* TAG_META */
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{"title", HTML_CLRLINE}, /* TAG_TITLE */
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{"div", HTML_CLRLINE}, /* TAG_DIV */
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{"h1", 0}, /* TAG_H1 */
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{"h2", 0}, /* TAG_H2 */
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{"span", 0}, /* TAG_SPAN */
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{"link", HTML_CLRLINE | HTML_NOSTACK | HTML_AUTOCLOSE}, /* TAG_LINK */
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{"br", HTML_CLRLINE | HTML_NOSTACK | HTML_AUTOCLOSE}, /* TAG_BR */
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{"a", 0}, /* TAG_A */
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{"table", HTML_CLRLINE}, /* TAG_TABLE */
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{"tbody", HTML_CLRLINE}, /* TAG_TBODY */
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{"col", HTML_CLRLINE | HTML_NOSTACK | HTML_AUTOCLOSE}, /* TAG_COL */
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{"tr", HTML_CLRLINE}, /* TAG_TR */
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{"td", HTML_CLRLINE}, /* TAG_TD */
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{"li", HTML_CLRLINE}, /* TAG_LI */
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{"ul", HTML_CLRLINE}, /* TAG_UL */
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{"ol", HTML_CLRLINE}, /* TAG_OL */
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{"dl", HTML_CLRLINE}, /* TAG_DL */
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{"dt", HTML_CLRLINE}, /* TAG_DT */
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{"dd", HTML_CLRLINE}, /* TAG_DD */
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{"blockquote", HTML_CLRLINE}, /* TAG_BLOCKQUOTE */
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{"pre", HTML_CLRLINE }, /* TAG_PRE */
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{"b", 0 }, /* TAG_B */
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{"i", 0 }, /* TAG_I */
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{"code", 0 }, /* TAG_CODE */
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{"small", 0 }, /* TAG_SMALL */
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{"style", HTML_CLRLINE}, /* TAG_STYLE */
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{"math", HTML_CLRLINE}, /* TAG_MATH */
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{"mrow", 0}, /* TAG_MROW */
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{"mi", 0}, /* TAG_MI */
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{"mo", 0}, /* TAG_MO */
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{"msup", 0}, /* TAG_MSUP */
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{"msub", 0}, /* TAG_MSUB */
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{"msubsup", 0}, /* TAG_MSUBSUP */
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{"mfrac", 0}, /* TAG_MFRAC */
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{"msqrt", 0}, /* TAG_MSQRT */
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{"mfenced", 0}, /* TAG_MFENCED */
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{"mtable", 0}, /* TAG_MTABLE */
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{"mtr", 0}, /* TAG_MTR */
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{"mtd", 0}, /* TAG_MTD */
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{"munderover", 0}, /* TAG_MUNDEROVER */
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{"munder", 0}, /* TAG_MUNDER*/
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{"mover", 0}, /* TAG_MOVER*/
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};
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static const char *const htmlattrs[ATTR_MAX] = {
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"name", /* ATTR_NAME */
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"rel", /* ATTR_REL */
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"href", /* ATTR_HREF */
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"type", /* ATTR_TYPE */
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"media", /* ATTR_MEDIA */
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"class", /* ATTR_CLASS */
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"style", /* ATTR_STYLE */
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"id", /* ATTR_ID */
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"colspan", /* ATTR_COLSPAN */
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"charset", /* ATTR_CHARSET */
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"open", /* ATTR_OPEN */
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"close", /* ATTR_CLOSE */
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"mathvariant", /* ATTR_MATHVARIANT */
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};
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static const char *const roffscales[SCALE_MAX] = {
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"cm", /* SCALE_CM */
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"in", /* SCALE_IN */
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"pc", /* SCALE_PC */
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"pt", /* SCALE_PT */
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"em", /* SCALE_EM */
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"em", /* SCALE_MM */
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"ex", /* SCALE_EN */
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"ex", /* SCALE_BU */
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"em", /* SCALE_VS */
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"ex", /* SCALE_FS */
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};
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static void bufncat(struct html *, const char *, size_t);
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static void print_ctag(struct html *, enum htmltag);
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static int print_escape(char);
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static int print_encode(struct html *, const char *, int);
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static void print_metaf(struct html *, enum mandoc_esc);
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static void print_attr(struct html *, const char *, const char *);
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void *
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html_alloc(const struct mchars *mchars, char *outopts)
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{
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struct html *h;
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const char *toks[5];
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char *v;
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toks[0] = "style";
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toks[1] = "man";
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toks[2] = "includes";
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toks[3] = "fragment";
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toks[4] = NULL;
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h = mandoc_calloc(1, sizeof(struct html));
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h->tags.head = NULL;
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h->symtab = mchars;
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while (outopts && *outopts)
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switch (getsubopt(&outopts, UNCONST(toks), &v)) {
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case 0:
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h->style = v;
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break;
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case 1:
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h->base_man = v;
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break;
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case 2:
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h->base_includes = v;
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break;
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case 3:
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h->oflags |= HTML_FRAGMENT;
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break;
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default:
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break;
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}
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return(h);
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}
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void
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html_free(void *p)
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{
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struct tag *tag;
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struct html *h;
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h = (struct html *)p;
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while ((tag = h->tags.head) != NULL) {
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h->tags.head = tag->next;
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free(tag);
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}
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free(h);
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}
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void
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print_gen_head(struct html *h)
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{
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struct htmlpair tag[4];
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struct tag *t;
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tag[0].key = ATTR_CHARSET;
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tag[0].val = "utf-8";
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print_otag(h, TAG_META, 1, tag);
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/*
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* Print a default style-sheet.
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*/
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t = print_otag(h, TAG_STYLE, 0, NULL);
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print_text(h, "table.head, table.foot { width: 100%; }\n"
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"td.head-rtitle, td.foot-os { text-align: right; }\n"
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"td.head-vol { text-align: center; }\n"
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"table.foot td { width: 50%; }\n"
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"table.head td { width: 33%; }\n"
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"div.spacer { margin: 1em 0; }\n");
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print_tagq(h, t);
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if (h->style) {
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tag[0].key = ATTR_REL;
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tag[0].val = "stylesheet";
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tag[1].key = ATTR_HREF;
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tag[1].val = h->style;
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tag[2].key = ATTR_TYPE;
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tag[2].val = "text/css";
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tag[3].key = ATTR_MEDIA;
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tag[3].val = "all";
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print_otag(h, TAG_LINK, 4, tag);
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}
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}
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static void
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print_metaf(struct html *h, enum mandoc_esc deco)
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{
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enum htmlfont font;
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switch (deco) {
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case ESCAPE_FONTPREV:
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font = h->metal;
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break;
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case ESCAPE_FONTITALIC:
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font = HTMLFONT_ITALIC;
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break;
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case ESCAPE_FONTBOLD:
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font = HTMLFONT_BOLD;
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break;
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case ESCAPE_FONTBI:
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font = HTMLFONT_BI;
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break;
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case ESCAPE_FONT:
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/* FALLTHROUGH */
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case ESCAPE_FONTROMAN:
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font = HTMLFONT_NONE;
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break;
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default:
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abort();
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/* NOTREACHED */
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}
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if (h->metaf) {
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print_tagq(h, h->metaf);
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h->metaf = NULL;
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}
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h->metal = h->metac;
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h->metac = font;
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switch (font) {
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case HTMLFONT_ITALIC:
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h->metaf = print_otag(h, TAG_I, 0, NULL);
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break;
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case HTMLFONT_BOLD:
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h->metaf = print_otag(h, TAG_B, 0, NULL);
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break;
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case HTMLFONT_BI:
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h->metaf = print_otag(h, TAG_B, 0, NULL);
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print_otag(h, TAG_I, 0, NULL);
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break;
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default:
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break;
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}
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}
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int
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html_strlen(const char *cp)
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{
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size_t rsz;
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int skip, sz;
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/*
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* Account for escaped sequences within string length
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* calculations. This follows the logic in term_strlen() as we
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* must calculate the width of produced strings.
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* Assume that characters are always width of "1". This is
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* hacky, but it gets the job done for approximation of widths.
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*/
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sz = 0;
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skip = 0;
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while (1) {
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rsz = strcspn(cp, "\\");
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if (rsz) {
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cp += rsz;
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if (skip) {
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skip = 0;
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rsz--;
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}
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sz += rsz;
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}
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if ('\0' == *cp)
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break;
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cp++;
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switch (mandoc_escape(&cp, NULL, NULL)) {
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case ESCAPE_ERROR:
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return(sz);
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case ESCAPE_UNICODE:
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/* FALLTHROUGH */
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case ESCAPE_NUMBERED:
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/* FALLTHROUGH */
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case ESCAPE_SPECIAL:
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if (skip)
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skip = 0;
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else
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sz++;
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break;
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case ESCAPE_SKIPCHAR:
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skip = 1;
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break;
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default:
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break;
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}
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}
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return(sz);
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}
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static int
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print_escape(char c)
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{
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switch (c) {
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case '<':
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printf("<");
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break;
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case '>':
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printf(">");
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break;
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case '&':
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printf("&");
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break;
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case '"':
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printf(""");
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break;
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case ASCII_NBRSP:
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putchar('-');
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break;
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case ASCII_HYPH:
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putchar('-');
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/* FALLTHROUGH */
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case ASCII_BREAK:
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break;
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default:
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return(0);
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}
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return(1);
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}
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static int
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print_encode(struct html *h, const char *p, int norecurse)
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{
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size_t sz;
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int c, len, nospace;
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const char *seq;
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enum mandoc_esc esc;
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static const char rejs[9] = { '\\', '<', '>', '&', '"',
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ASCII_NBRSP, ASCII_HYPH, ASCII_BREAK, '\0' };
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nospace = 0;
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while ('\0' != *p) {
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if (HTML_SKIPCHAR & h->flags && '\\' != *p) {
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h->flags &= ~HTML_SKIPCHAR;
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p++;
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continue;
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}
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sz = strcspn(p, rejs);
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fwrite(p, 1, sz, stdout);
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p += (int)sz;
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if ('\0' == *p)
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break;
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if (print_escape(*p++))
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continue;
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esc = mandoc_escape(&p, &seq, &len);
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if (ESCAPE_ERROR == esc)
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break;
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switch (esc) {
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case ESCAPE_FONT:
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/* FALLTHROUGH */
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case ESCAPE_FONTPREV:
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/* FALLTHROUGH */
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case ESCAPE_FONTBOLD:
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/* FALLTHROUGH */
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case ESCAPE_FONTITALIC:
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/* FALLTHROUGH */
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case ESCAPE_FONTBI:
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/* FALLTHROUGH */
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case ESCAPE_FONTROMAN:
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if (0 == norecurse)
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print_metaf(h, esc);
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continue;
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case ESCAPE_SKIPCHAR:
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h->flags |= HTML_SKIPCHAR;
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continue;
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default:
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break;
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}
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if (h->flags & HTML_SKIPCHAR) {
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h->flags &= ~HTML_SKIPCHAR;
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continue;
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}
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switch (esc) {
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case ESCAPE_UNICODE:
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/* Skip past "u" header. */
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c = mchars_num2uc(seq + 1, len - 1);
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break;
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case ESCAPE_NUMBERED:
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c = mchars_num2char(seq, len);
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if (c < 0)
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continue;
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break;
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case ESCAPE_SPECIAL:
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c = mchars_spec2cp(h->symtab, seq, len);
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if (c <= 0)
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continue;
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break;
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case ESCAPE_NOSPACE:
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if ('\0' == *p)
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nospace = 1;
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continue;
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default:
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continue;
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}
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if ((c < 0x20 && c != 0x09) ||
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(c > 0x7E && c < 0xA0))
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c = 0xFFFD;
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if (c > 0x7E)
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printf("&#%d;", c);
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else if ( ! print_escape(c))
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putchar(c);
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}
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return(nospace);
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}
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static void
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print_attr(struct html *h, const char *key, const char *val)
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{
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printf(" %s=\"", key);
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(void)print_encode(h, val, 1);
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putchar('\"');
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}
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struct tag *
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print_otag(struct html *h, enum htmltag tag,
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int sz, const struct htmlpair *p)
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{
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int i;
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struct tag *t;
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/* Push this tags onto the stack of open scopes. */
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if ( ! (HTML_NOSTACK & htmltags[tag].flags)) {
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t = mandoc_malloc(sizeof(struct tag));
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t->tag = tag;
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t->next = h->tags.head;
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h->tags.head = t;
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} else
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t = NULL;
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if ( ! (HTML_NOSPACE & h->flags))
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if ( ! (HTML_CLRLINE & htmltags[tag].flags)) {
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/* Manage keeps! */
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if ( ! (HTML_KEEP & h->flags)) {
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if (HTML_PREKEEP & h->flags)
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h->flags |= HTML_KEEP;
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putchar(' ');
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} else
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printf(" ");
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}
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if ( ! (h->flags & HTML_NONOSPACE))
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h->flags &= ~HTML_NOSPACE;
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else
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h->flags |= HTML_NOSPACE;
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/* Print out the tag name and attributes. */
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printf("<%s", htmltags[tag].name);
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for (i = 0; i < sz; i++)
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print_attr(h, htmlattrs[p[i].key], p[i].val);
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/* Accommodate for "well-formed" singleton escaping. */
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if (HTML_AUTOCLOSE & htmltags[tag].flags)
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putchar('/');
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putchar('>');
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h->flags |= HTML_NOSPACE;
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if ((HTML_AUTOCLOSE | HTML_CLRLINE) & htmltags[tag].flags)
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putchar('\n');
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return(t);
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}
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static void
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print_ctag(struct html *h, enum htmltag tag)
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{
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printf("</%s>", htmltags[tag].name);
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if (HTML_CLRLINE & htmltags[tag].flags) {
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h->flags |= HTML_NOSPACE;
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putchar('\n');
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}
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}
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void
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print_gen_decls(struct html *h)
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{
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puts("<!DOCTYPE html>");
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}
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void
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print_text(struct html *h, const char *word)
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{
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if ( ! (HTML_NOSPACE & h->flags)) {
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/* Manage keeps! */
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if ( ! (HTML_KEEP & h->flags)) {
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if (HTML_PREKEEP & h->flags)
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h->flags |= HTML_KEEP;
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putchar(' ');
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} else
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printf(" ");
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}
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assert(NULL == h->metaf);
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switch (h->metac) {
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case HTMLFONT_ITALIC:
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h->metaf = print_otag(h, TAG_I, 0, NULL);
|
|
break;
|
|
case HTMLFONT_BOLD:
|
|
h->metaf = print_otag(h, TAG_B, 0, NULL);
|
|
break;
|
|
case HTMLFONT_BI:
|
|
h->metaf = print_otag(h, TAG_B, 0, NULL);
|
|
print_otag(h, TAG_I, 0, NULL);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
assert(word);
|
|
if ( ! print_encode(h, word, 0)) {
|
|
if ( ! (h->flags & HTML_NONOSPACE))
|
|
h->flags &= ~HTML_NOSPACE;
|
|
h->flags &= ~HTML_NONEWLINE;
|
|
} else
|
|
h->flags |= HTML_NOSPACE | HTML_NONEWLINE;
|
|
|
|
if (h->metaf) {
|
|
print_tagq(h, h->metaf);
|
|
h->metaf = NULL;
|
|
}
|
|
|
|
h->flags &= ~HTML_IGNDELIM;
|
|
}
|
|
|
|
void
|
|
print_tagq(struct html *h, const struct tag *until)
|
|
{
|
|
struct tag *tag;
|
|
|
|
while ((tag = h->tags.head) != NULL) {
|
|
/*
|
|
* Remember to close out and nullify the current
|
|
* meta-font and table, if applicable.
|
|
*/
|
|
if (tag == h->metaf)
|
|
h->metaf = NULL;
|
|
if (tag == h->tblt)
|
|
h->tblt = NULL;
|
|
print_ctag(h, tag->tag);
|
|
h->tags.head = tag->next;
|
|
free(tag);
|
|
if (until && tag == until)
|
|
return;
|
|
}
|
|
}
|
|
|
|
void
|
|
print_stagq(struct html *h, const struct tag *suntil)
|
|
{
|
|
struct tag *tag;
|
|
|
|
while ((tag = h->tags.head) != NULL) {
|
|
if (suntil && tag == suntil)
|
|
return;
|
|
/*
|
|
* Remember to close out and nullify the current
|
|
* meta-font and table, if applicable.
|
|
*/
|
|
if (tag == h->metaf)
|
|
h->metaf = NULL;
|
|
if (tag == h->tblt)
|
|
h->tblt = NULL;
|
|
print_ctag(h, tag->tag);
|
|
h->tags.head = tag->next;
|
|
free(tag);
|
|
}
|
|
}
|
|
|
|
void
|
|
print_paragraph(struct html *h)
|
|
{
|
|
struct tag *t;
|
|
struct htmlpair tag;
|
|
|
|
PAIR_CLASS_INIT(&tag, "spacer");
|
|
t = print_otag(h, TAG_DIV, 1, &tag);
|
|
print_tagq(h, t);
|
|
}
|
|
|
|
|
|
void
|
|
bufinit(struct html *h)
|
|
{
|
|
|
|
h->buf[0] = '\0';
|
|
h->buflen = 0;
|
|
}
|
|
|
|
void
|
|
bufcat_style(struct html *h, const char *key, const char *val)
|
|
{
|
|
|
|
bufcat(h, key);
|
|
bufcat(h, ":");
|
|
bufcat(h, val);
|
|
bufcat(h, ";");
|
|
}
|
|
|
|
void
|
|
bufcat(struct html *h, const char *p)
|
|
{
|
|
|
|
/*
|
|
* XXX This is broken and not easy to fix.
|
|
* When using the -Oincludes option, buffmt_includes()
|
|
* may pass in strings overrunning BUFSIZ, causing a crash.
|
|
*/
|
|
|
|
h->buflen = strlcat(h->buf, p, BUFSIZ);
|
|
assert(h->buflen < BUFSIZ);
|
|
}
|
|
|
|
void
|
|
bufcat_fmt(struct html *h, const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
(void)vsnprintf(h->buf + (int)h->buflen,
|
|
BUFSIZ - h->buflen - 1, fmt, ap);
|
|
va_end(ap);
|
|
h->buflen = strlen(h->buf);
|
|
}
|
|
|
|
static void
|
|
bufncat(struct html *h, const char *p, size_t sz)
|
|
{
|
|
|
|
assert(h->buflen + sz + 1 < BUFSIZ);
|
|
strncat(h->buf, p, sz);
|
|
h->buflen += sz;
|
|
}
|
|
|
|
void
|
|
buffmt_includes(struct html *h, const char *name)
|
|
{
|
|
const char *p, *pp;
|
|
|
|
pp = h->base_includes;
|
|
|
|
bufinit(h);
|
|
while (NULL != (p = strchr(pp, '%'))) {
|
|
bufncat(h, pp, (size_t)(p - pp));
|
|
switch (*(p + 1)) {
|
|
case'I':
|
|
bufcat(h, name);
|
|
break;
|
|
default:
|
|
bufncat(h, p, 2);
|
|
break;
|
|
}
|
|
pp = p + 2;
|
|
}
|
|
if (pp)
|
|
bufcat(h, pp);
|
|
}
|
|
|
|
void
|
|
buffmt_man(struct html *h, const char *name, const char *sec)
|
|
{
|
|
const char *p, *pp;
|
|
|
|
pp = h->base_man;
|
|
|
|
bufinit(h);
|
|
while (NULL != (p = strchr(pp, '%'))) {
|
|
bufncat(h, pp, (size_t)(p - pp));
|
|
switch (*(p + 1)) {
|
|
case 'S':
|
|
bufcat(h, sec ? sec : "1");
|
|
break;
|
|
case 'N':
|
|
bufcat_fmt(h, "%s", name);
|
|
break;
|
|
default:
|
|
bufncat(h, p, 2);
|
|
break;
|
|
}
|
|
pp = p + 2;
|
|
}
|
|
if (pp)
|
|
bufcat(h, pp);
|
|
}
|
|
|
|
void
|
|
bufcat_su(struct html *h, const char *p, const struct roffsu *su)
|
|
{
|
|
double v;
|
|
|
|
v = su->scale;
|
|
if (SCALE_MM == su->unit && 0.0 == (v /= 100.0))
|
|
v = 1.0;
|
|
else if (SCALE_BU == su->unit)
|
|
v /= 24.0;
|
|
|
|
bufcat_fmt(h, "%s: %.2f%s;", p, v, roffscales[su->unit]);
|
|
}
|
|
|
|
void
|
|
bufcat_id(struct html *h, const char *src)
|
|
{
|
|
|
|
/* Cf. <http://www.w3.org/TR/html4/types.html#h-6.2>. */
|
|
|
|
while ('\0' != *src)
|
|
bufcat_fmt(h, "%.2x", *src++);
|
|
}
|