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Diffstat (limited to 'contrib/texinfo/makeinfo/html.c')
| -rw-r--r-- | contrib/texinfo/makeinfo/html.c | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/contrib/texinfo/makeinfo/html.c b/contrib/texinfo/makeinfo/html.c new file mode 100644 index 0000000..f2e53e5 --- /dev/null +++ b/contrib/texinfo/makeinfo/html.c @@ -0,0 +1,182 @@ +/* html.c -- html-related utilities. + $Id: html.c,v 1.5 1999/09/18 19:27:41 karl Exp $ + + Copyright (C) 1999 Free Software Foundation, Inc. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2, or (at your option) + any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software Foundation, + Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + +#include "system.h" +#include "cmds.h" +#include "html.h" +#include "lang.h" +#include "makeinfo.h" +#include "sectioning.h" + +/* See html.h. */ +int html_output_head_p = 0; + +void +html_output_head () +{ + char *html_title; + + if (html_output_head_p) + return; + html_output_head_p = 1; + + /* The <title> should not have markup. */ + html_title = title ? text_expansion (title) : _("Untitled"); + + add_word_args ("<html lang=\"%s\"><head>\n<title>%s</title>\n", + language_table[language_code].abbrev, html_title); + + add_word ("<meta http-equiv=\"Content-Type\" content=\"text/html"); + if (document_encoding) + add_word_args ("; charset=%s", document_encoding); + add_word ("\">\n"); + + add_word_args ("<meta name=description content=\"%s\">\n", html_title); + add_word_args ("<meta name=generator content=\"makeinfo %s\">\n", VERSION); + add_word ("<link href=\"http://texinfo.org/\" rel=generator-home>\n"); + add_word ("</head><body>\n\n"); +} + + +/* Escape HTML special characters in the string if necessary, + returning a pointer to a possibly newly-allocated one. */ +char * +escape_string (string) + char * string; +{ + int i=0, newlen=0; + char * newstring; + + do + { + /* Find how much to allocate. */ + switch (string[i]) + { + case '&': + newlen += 5; /* `&' */ + break; + case '<': + case '>': + newlen += 4; /* `<', `>' */ + break; + default: + newlen++; + } + i++; + } + while (string[i]); + + if (newlen == i) return string; /* Already OK. */ + + newstring = xmalloc (newlen + 2); + i = 0; + do + { + switch (string[i]) + { + case '&': + strcpy (newstring, "&"); + newstring += 5; + break; + case '<': + strcpy (newstring, "<"); + newstring += 4; + break; + case '>': + strcpy (newstring, ">"); + newstring += 4; + break; + default: + newstring[0] = string[i]; + newstring++; + } + } + while (string[i++]); + free (string); + return newstring - newlen -1; +} + +/* Open or close TAG according to START_OR_END. */ +void +insert_html_tag (start_or_end, tag) + int start_or_end; + char *tag; +{ + if (!paragraph_is_open && (start_or_end == START)) + { + /* Need to compensate for the <p> we are about to insert, or + else cm_xxx functions that call us will get wrong text + between START and END. */ + adjust_braces_following (output_paragraph_offset, 3); + add_word ("<p>"); + } + add_char ('<'); + if (start_or_end != START) + add_char ('/'); + add_word (tag); + add_char ('>'); +} + +/* Output an HTML <link> to the filename for NODE, including the + other string as extra attributes. */ +void +add_link (node, attributes) + char *node, *attributes; +{ + if (node) + { + add_word_args ("<link %s href=\"", attributes); + add_anchor_name (node, 1); + add_word ("\">\n"); + } +} + +/* Output NAME with characters escaped as appropriate for an anchor + name, i.e., escape URL special characters as %<n>. */ +void +add_escaped_anchor_name (name) + char *name; +{ + for (; *name; name++) + { + if (*name == '&') + add_word ("&"); + else if (! URL_SAFE_CHAR (*name)) + /* Cast so characters with the high bit set are treated as >128, + for example o-umlaut should be 246, not -10. */ + add_word_args ("%%%x", (unsigned char) *name); + else + add_char (*name); + } +} + +/* Insert the text for the name of a reference in an HTML anchor + appropriate for NODENAME. If HREF is nonzero, it will be + appropriate for a href= attribute, rather than name= i.e., including + the `#' if it's an internal reference. */ +void +add_anchor_name (nodename, href) + char *nodename; + int href; +{ + if (href) + add_char ('#'); + + add_escaped_anchor_name (nodename); +} |
