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HTMLparser.c
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HTMLparser.c
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/*
* HTMLparser.c : an HTML 4.0 non-verifying parser
*
* See Copyright for the status of this software.
*
* daniel@veillard.com
*/
#define IN_LIBXML
#include "libxml.h"
#ifdef LIBXML_HTML_ENABLED
#include <string.h>
#include <ctype.h>
#include <stdlib.h>
#include <libxml/HTMLparser.h>
#include <libxml/xmlmemory.h>
#include <libxml/tree.h>
#include <libxml/parser.h>
#include <libxml/parserInternals.h>
#include <libxml/xmlerror.h>
#include <libxml/HTMLtree.h>
#include <libxml/entities.h>
#include <libxml/encoding.h>
#include <libxml/xmlIO.h>
#include <libxml/uri.h>
#include "private/buf.h"
#include "private/enc.h"
#include "private/error.h"
#include "private/html.h"
#include "private/io.h"
#include "private/parser.h"
#include "private/tree.h"
#define HTML_MAX_NAMELEN 1000
#define HTML_PARSER_BIG_BUFFER_SIZE 1000
#define HTML_PARSER_BUFFER_SIZE 100
static int htmlOmittedDefaultValue = 1;
xmlChar * htmlDecodeEntities(htmlParserCtxtPtr ctxt, int len,
xmlChar end, xmlChar end2, xmlChar end3);
static void htmlParseComment(htmlParserCtxtPtr ctxt);
/************************************************************************
* *
* Some factorized error routines *
* *
************************************************************************/
/**
* htmlErrMemory:
* @ctxt: an HTML parser context
* @extra: extra information
*
* Handle a redefinition of attribute error
*/
static void
htmlErrMemory(xmlParserCtxtPtr ctxt)
{
xmlCtxtErrMemory(ctxt);
}
/**
* htmlParseErr:
* @ctxt: an HTML parser context
* @error: the error number
* @msg: the error message
* @str1: string infor
* @str2: string infor
*
* Handle a fatal parser error, i.e. violating Well-Formedness constraints
*/
static void LIBXML_ATTR_FORMAT(3,0)
htmlParseErr(xmlParserCtxtPtr ctxt, xmlParserErrors error,
const char *msg, const xmlChar *str1, const xmlChar *str2)
{
xmlCtxtErr(ctxt, NULL, XML_FROM_HTML, error, XML_ERR_ERROR,
str1, str2, NULL, 0, msg, str1, str2);
}
/**
* htmlParseErrInt:
* @ctxt: an HTML parser context
* @error: the error number
* @msg: the error message
* @val: integer info
*
* Handle a fatal parser error, i.e. violating Well-Formedness constraints
*/
static void LIBXML_ATTR_FORMAT(3,0)
htmlParseErrInt(xmlParserCtxtPtr ctxt, xmlParserErrors error,
const char *msg, int val)
{
xmlCtxtErr(ctxt, NULL, XML_FROM_HTML, error, XML_ERR_ERROR,
NULL, NULL, NULL, val, msg, val);
}
/************************************************************************
* *
* Parser stacks related functions and macros *
* *
************************************************************************/
/**
* htmlnamePush:
* @ctxt: an HTML parser context
* @value: the element name
*
* Pushes a new element name on top of the name stack
*
* Returns -1 in case of error, the index in the stack otherwise
*/
static int
htmlnamePush(htmlParserCtxtPtr ctxt, const xmlChar * value)
{
if ((ctxt->html < 3) && (xmlStrEqual(value, BAD_CAST "head")))
ctxt->html = 3;
if ((ctxt->html < 10) && (xmlStrEqual(value, BAD_CAST "body")))
ctxt->html = 10;
if (ctxt->nameNr >= ctxt->nameMax) {
size_t newSize = ctxt->nameMax * 2;
const xmlChar **tmp;
tmp = xmlRealloc((xmlChar **) ctxt->nameTab,
newSize * sizeof(ctxt->nameTab[0]));
if (tmp == NULL) {
htmlErrMemory(ctxt);
return (-1);
}
ctxt->nameTab = tmp;
ctxt->nameMax = newSize;
}
ctxt->nameTab[ctxt->nameNr] = value;
ctxt->name = value;
return (ctxt->nameNr++);
}
/**
* htmlnamePop:
* @ctxt: an HTML parser context
*
* Pops the top element name from the name stack
*
* Returns the name just removed
*/
static const xmlChar *
htmlnamePop(htmlParserCtxtPtr ctxt)
{
const xmlChar *ret;
if (ctxt->nameNr <= 0)
return (NULL);
ctxt->nameNr--;
if (ctxt->nameNr < 0)
return (NULL);
if (ctxt->nameNr > 0)
ctxt->name = ctxt->nameTab[ctxt->nameNr - 1];
else
ctxt->name = NULL;
ret = ctxt->nameTab[ctxt->nameNr];
ctxt->nameTab[ctxt->nameNr] = NULL;
return (ret);
}
/**
* htmlNodeInfoPush:
* @ctxt: an HTML parser context
* @value: the node info
*
* Pushes a new element name on top of the node info stack
*
* Returns 0 in case of error, the index in the stack otherwise
*/
static int
htmlNodeInfoPush(htmlParserCtxtPtr ctxt, htmlParserNodeInfo *value)
{
if (ctxt->nodeInfoNr >= ctxt->nodeInfoMax) {
if (ctxt->nodeInfoMax == 0)
ctxt->nodeInfoMax = 5;
ctxt->nodeInfoMax *= 2;
ctxt->nodeInfoTab = (htmlParserNodeInfo *)
xmlRealloc((htmlParserNodeInfo *)ctxt->nodeInfoTab,
ctxt->nodeInfoMax *
sizeof(ctxt->nodeInfoTab[0]));
if (ctxt->nodeInfoTab == NULL) {
htmlErrMemory(ctxt);
return (0);
}
}
ctxt->nodeInfoTab[ctxt->nodeInfoNr] = *value;
ctxt->nodeInfo = &ctxt->nodeInfoTab[ctxt->nodeInfoNr];
return (ctxt->nodeInfoNr++);
}
/**
* htmlNodeInfoPop:
* @ctxt: an HTML parser context
*
* Pops the top element name from the node info stack
*
* Returns 0 in case of error, the pointer to NodeInfo otherwise
*/
static htmlParserNodeInfo *
htmlNodeInfoPop(htmlParserCtxtPtr ctxt)
{
if (ctxt->nodeInfoNr <= 0)
return (NULL);
ctxt->nodeInfoNr--;
if (ctxt->nodeInfoNr < 0)
return (NULL);
if (ctxt->nodeInfoNr > 0)
ctxt->nodeInfo = &ctxt->nodeInfoTab[ctxt->nodeInfoNr - 1];
else
ctxt->nodeInfo = NULL;
return &ctxt->nodeInfoTab[ctxt->nodeInfoNr];
}
/*
* Macros for accessing the content. Those should be used only by the parser,
* and not exported.
*
* Dirty macros, i.e. one need to make assumption on the context to use them
*
* CUR_PTR return the current pointer to the xmlChar to be parsed.
* CUR returns the current xmlChar value, i.e. a 8 bit value if compiled
* in ISO-Latin or UTF-8, and the current 16 bit value if compiled
* in UNICODE mode. This should be used internally by the parser
* only to compare to ASCII values otherwise it would break when
* running with UTF-8 encoding.
* NXT(n) returns the n'th next xmlChar. Same as CUR is should be used only
* to compare on ASCII based substring.
* UPP(n) returns the n'th next xmlChar converted to uppercase. Same as CUR
* it should be used only to compare on ASCII based substring.
* SKIP(n) Skip n xmlChar, and must also be used only to skip ASCII defined
* strings without newlines within the parser.
*
* Clean macros, not dependent of an ASCII context, expect UTF-8 encoding
*
* NEXT Skip to the next character, this does the proper decoding
* in UTF-8 mode. It also pop-up unfinished entities on the fly.
* NEXTL(l) Skip the current unicode character of l xmlChars long.
* COPY(to) copy one char to *to, increment CUR_PTR and to accordingly
*/
#define UPPER (toupper(*ctxt->input->cur))
#define SKIP(val) ctxt->input->cur += (val),ctxt->input->col+=(val)
#define NXT(val) ctxt->input->cur[(val)]
#define UPP(val) (toupper(ctxt->input->cur[(val)]))
#define CUR_PTR ctxt->input->cur
#define BASE_PTR ctxt->input->base
#define SHRINK \
if ((!PARSER_PROGRESSIVE(ctxt)) && \
(ctxt->input->cur - ctxt->input->base > 2 * INPUT_CHUNK) && \
(ctxt->input->end - ctxt->input->cur < 2 * INPUT_CHUNK)) \
xmlParserShrink(ctxt);
#define GROW \
if ((!PARSER_PROGRESSIVE(ctxt)) && \
(ctxt->input->end - ctxt->input->cur < INPUT_CHUNK)) \
xmlParserGrow(ctxt);
#define SKIP_BLANKS htmlSkipBlankChars(ctxt)
/* Imported from XML */
#define CUR (*ctxt->input->cur)
#define NEXT xmlNextChar(ctxt)
#define RAW (ctxt->token ? -1 : (*ctxt->input->cur))
#define NEXTL(l) do { \
if (*(ctxt->input->cur) == '\n') { \
ctxt->input->line++; ctxt->input->col = 1; \
} else ctxt->input->col++; \
ctxt->token = 0; ctxt->input->cur += l; \
} while (0)
/************
\
if (*ctxt->input->cur == '%') xmlParserHandlePEReference(ctxt); \
if (*ctxt->input->cur == '&') xmlParserHandleReference(ctxt);
************/
#define CUR_CHAR(l) htmlCurrentChar(ctxt, &l)
#define COPY_BUF(l,b,i,v) \
if (l == 1) b[i++] = v; \
else i += xmlCopyChar(l,&b[i],v)
/**
* htmlFindEncoding:
* @the HTML parser context
*
* Ty to find and encoding in the current data available in the input
* buffer this is needed to try to switch to the proper encoding when
* one face a character error.
* That's an heuristic, since it's operating outside of parsing it could
* try to use a meta which had been commented out, that's the reason it
* should only be used in case of error, not as a default.
*
* Returns an encoding string or NULL if not found, the string need to
* be freed
*/
static xmlChar *
htmlFindEncoding(xmlParserCtxtPtr ctxt) {
const xmlChar *start, *cur, *end;
xmlChar *ret;
if ((ctxt == NULL) || (ctxt->input == NULL) ||
(ctxt->input->flags & XML_INPUT_HAS_ENCODING))
return(NULL);
if ((ctxt->input->cur == NULL) || (ctxt->input->end == NULL))
return(NULL);
start = ctxt->input->cur;
end = ctxt->input->end;
/* we also expect the input buffer to be zero terminated */
if (*end != 0)
return(NULL);
cur = xmlStrcasestr(start, BAD_CAST "HTTP-EQUIV");
if (cur == NULL)
return(NULL);
cur = xmlStrcasestr(cur, BAD_CAST "CONTENT");
if (cur == NULL)
return(NULL);
cur = xmlStrcasestr(cur, BAD_CAST "CHARSET=");
if (cur == NULL)
return(NULL);
cur += 8;
start = cur;
while (((*cur >= 'A') && (*cur <= 'Z')) ||
((*cur >= 'a') && (*cur <= 'z')) ||
((*cur >= '0') && (*cur <= '9')) ||
(*cur == '-') || (*cur == '_') || (*cur == ':') || (*cur == '/'))
cur++;
if (cur == start)
return(NULL);
ret = xmlStrndup(start, cur - start);
if (ret == NULL)
htmlErrMemory(ctxt);
return(ret);
}
/**
* htmlCurrentChar:
* @ctxt: the HTML parser context
* @len: pointer to the length of the char read
*
* The current char value, if using UTF-8 this may actually span multiple
* bytes in the input buffer. Implement the end of line normalization:
* 2.11 End-of-Line Handling
* If the encoding is unspecified, in the case we find an ISO-Latin-1
* char, then the encoding converter is plugged in automatically.
*
* Returns the current char value and its length
*/
static int
htmlCurrentChar(xmlParserCtxtPtr ctxt, int *len) {
const unsigned char *cur;
unsigned char c;
unsigned int val;
if (ctxt->token != 0) {
*len = 0;
return(ctxt->token);
}
if (ctxt->input->end - ctxt->input->cur < INPUT_CHUNK)
xmlParserGrow(ctxt);
if ((ctxt->input->flags & XML_INPUT_HAS_ENCODING) == 0) {
xmlChar * guess;
/*
* Assume it's a fixed length encoding (1) with
* a compatible encoding for the ASCII set, since
* HTML constructs only use < 128 chars
*/
if (*ctxt->input->cur < 0x80) {
if (*ctxt->input->cur == 0) {
if (ctxt->input->cur < ctxt->input->end) {
htmlParseErrInt(ctxt, XML_ERR_INVALID_CHAR,
"Char 0x%X out of allowed range\n", 0);
*len = 1;
return(' ');
} else {
*len = 0;
return(0);
}
}
*len = 1;
return(*ctxt->input->cur);
}
/*
* Humm this is bad, do an automatic flow conversion
*/
guess = htmlFindEncoding(ctxt);
if (guess == NULL) {
xmlSwitchEncoding(ctxt, XML_CHAR_ENCODING_8859_1);
} else {
xmlSwitchEncodingName(ctxt, (const char *) guess);
xmlFree(guess);
}
ctxt->input->flags |= XML_INPUT_HAS_ENCODING;
}
/*
* We are supposed to handle UTF8, check it's valid
* From rfc2044: encoding of the Unicode values on UTF-8:
*
* UCS-4 range (hex.) UTF-8 octet sequence (binary)
* 0000 0000-0000 007F 0xxxxxxx
* 0000 0080-0000 07FF 110xxxxx 10xxxxxx
* 0000 0800-0000 FFFF 1110xxxx 10xxxxxx 10xxxxxx
*
* Check for the 0x110000 limit too
*/
cur = ctxt->input->cur;
c = *cur;
if (c & 0x80) {
size_t avail;
if ((c & 0x40) == 0)
goto encoding_error;
avail = ctxt->input->end - ctxt->input->cur;
if ((avail < 2) || ((cur[1] & 0xc0) != 0x80))
goto encoding_error;
if ((c & 0xe0) == 0xe0) {
if ((avail < 3) || ((cur[2] & 0xc0) != 0x80))
goto encoding_error;
if ((c & 0xf0) == 0xf0) {
if (((c & 0xf8) != 0xf0) ||
(avail < 4) || ((cur[3] & 0xc0) != 0x80))
goto encoding_error;
/* 4-byte code */
*len = 4;
val = (cur[0] & 0x7) << 18;
val |= (cur[1] & 0x3f) << 12;
val |= (cur[2] & 0x3f) << 6;
val |= cur[3] & 0x3f;
if (val < 0x10000)
goto encoding_error;
} else {
/* 3-byte code */
*len = 3;
val = (cur[0] & 0xf) << 12;
val |= (cur[1] & 0x3f) << 6;
val |= cur[2] & 0x3f;
if (val < 0x800)
goto encoding_error;
}
} else {
/* 2-byte code */
*len = 2;
val = (cur[0] & 0x1f) << 6;
val |= cur[1] & 0x3f;
if (val < 0x80)
goto encoding_error;
}
if (!IS_CHAR(val)) {
htmlParseErrInt(ctxt, XML_ERR_INVALID_CHAR,
"Char 0x%X out of allowed range\n", val);
}
return(val);
} else {
if (*ctxt->input->cur == 0) {
if (ctxt->input->cur < ctxt->input->end) {
htmlParseErrInt(ctxt, XML_ERR_INVALID_CHAR,
"Char 0x%X out of allowed range\n", 0);
*len = 1;
return(' ');
} else {
*len = 0;
return(0);
}
}
/* 1-byte code */
*len = 1;
return(*ctxt->input->cur);
}
encoding_error:
xmlCtxtErrIO(ctxt, XML_ERR_INVALID_ENCODING, NULL);
if ((ctxt->input->flags & XML_INPUT_HAS_ENCODING) == 0)
xmlSwitchEncoding(ctxt, XML_CHAR_ENCODING_8859_1);
*len = 1;
return(*ctxt->input->cur);
}
/**
* htmlSkipBlankChars:
* @ctxt: the HTML parser context
*
* skip all blanks character found at that point in the input streams.
*
* Returns the number of space chars skipped
*/
static int
htmlSkipBlankChars(xmlParserCtxtPtr ctxt) {
int res = 0;
while (IS_BLANK_CH(*(ctxt->input->cur))) {
if (*(ctxt->input->cur) == '\n') {
ctxt->input->line++; ctxt->input->col = 1;
} else ctxt->input->col++;
ctxt->input->cur++;
if (*ctxt->input->cur == 0)
xmlParserGrow(ctxt);
if (res < INT_MAX)
res++;
}
return(res);
}
/************************************************************************
* *
* The list of HTML elements and their properties *
* *
************************************************************************/
/*
* Start Tag: 1 means the start tag can be omitted
* End Tag: 1 means the end tag can be omitted
* 2 means it's forbidden (empty elements)
* 3 means the tag is stylistic and should be closed easily
* Depr: this element is deprecated
* DTD: 1 means that this element is valid only in the Loose DTD
* 2 means that this element is valid only in the Frameset DTD
*
* Name,Start Tag,End Tag,Save End,Empty,Deprecated,DTD,inline,Description
, subElements , impliedsubelt , Attributes, userdata
*/
/* Definitions and a couple of vars for HTML Elements */
#define FONTSTYLE "tt", "i", "b", "u", "s", "strike", "big", "small"
#define NB_FONTSTYLE 8
#define PHRASE "em", "strong", "dfn", "code", "samp", "kbd", "var", "cite", "abbr", "acronym"
#define NB_PHRASE 10
#define SPECIAL "a", "img", "applet", "embed", "object", "font", "basefont", "br", "script", "map", "q", "sub", "sup", "span", "bdo", "iframe"
#define NB_SPECIAL 16
#define INLINE FONTSTYLE, PHRASE, SPECIAL, FORMCTRL
#define NB_INLINE NB_PCDATA + NB_FONTSTYLE + NB_PHRASE + NB_SPECIAL + NB_FORMCTRL
#define BLOCK HEADING, LIST, "pre", "p", "dl", "div", "center", "noscript", "noframes", "blockquote", "form", "isindex", "hr", "table", "fieldset", "address"
#define NB_BLOCK NB_HEADING + NB_LIST + 14
#define FORMCTRL "input", "select", "textarea", "label", "button"
#define NB_FORMCTRL 5
#define PCDATA
#define NB_PCDATA 0
#define HEADING "h1", "h2", "h3", "h4", "h5", "h6"
#define NB_HEADING 6
#define LIST "ul", "ol", "dir", "menu"
#define NB_LIST 4
#define MODIFIER
#define NB_MODIFIER 0
#define FLOW BLOCK,INLINE
#define NB_FLOW NB_BLOCK + NB_INLINE
#define EMPTY NULL
static const char* const html_flow[] = { FLOW, NULL } ;
static const char* const html_inline[] = { INLINE, NULL } ;
/* placeholders: elts with content but no subelements */
static const char* const html_pcdata[] = { NULL } ;
#define html_cdata html_pcdata
/* ... and for HTML Attributes */
#define COREATTRS "id", "class", "style", "title"
#define NB_COREATTRS 4
#define I18N "lang", "dir"
#define NB_I18N 2
#define EVENTS "onclick", "ondblclick", "onmousedown", "onmouseup", "onmouseover", "onmouseout", "onkeypress", "onkeydown", "onkeyup"
#define NB_EVENTS 9
#define ATTRS COREATTRS,I18N,EVENTS
#define NB_ATTRS NB_NB_COREATTRS + NB_I18N + NB_EVENTS
#define CELLHALIGN "align", "char", "charoff"
#define NB_CELLHALIGN 3
#define CELLVALIGN "valign"
#define NB_CELLVALIGN 1
static const char* const html_attrs[] = { ATTRS, NULL } ;
static const char* const core_i18n_attrs[] = { COREATTRS, I18N, NULL } ;
static const char* const core_attrs[] = { COREATTRS, NULL } ;
static const char* const i18n_attrs[] = { I18N, NULL } ;
/* Other declarations that should go inline ... */
static const char* const a_attrs[] = { ATTRS, "charset", "type", "name",
"href", "hreflang", "rel", "rev", "accesskey", "shape", "coords",
"tabindex", "onfocus", "onblur", NULL } ;
static const char* const target_attr[] = { "target", NULL } ;
static const char* const rows_cols_attr[] = { "rows", "cols", NULL } ;
static const char* const alt_attr[] = { "alt", NULL } ;
static const char* const src_alt_attrs[] = { "src", "alt", NULL } ;
static const char* const href_attrs[] = { "href", NULL } ;
static const char* const clear_attrs[] = { "clear", NULL } ;
static const char* const inline_p[] = { INLINE, "p", NULL } ;
static const char* const flow_param[] = { FLOW, "param", NULL } ;
static const char* const applet_attrs[] = { COREATTRS , "codebase",
"archive", "alt", "name", "height", "width", "align",
"hspace", "vspace", NULL } ;
static const char* const area_attrs[] = { "shape", "coords", "href", "nohref",
"tabindex", "accesskey", "onfocus", "onblur", NULL } ;
static const char* const basefont_attrs[] =
{ "id", "size", "color", "face", NULL } ;
static const char* const quote_attrs[] = { ATTRS, "cite", NULL } ;
static const char* const body_contents[] = { FLOW, "ins", "del", NULL } ;
static const char* const body_attrs[] = { ATTRS, "onload", "onunload", NULL } ;
static const char* const body_depr[] = { "background", "bgcolor", "text",
"link", "vlink", "alink", NULL } ;
static const char* const button_attrs[] = { ATTRS, "name", "value", "type",
"disabled", "tabindex", "accesskey", "onfocus", "onblur", NULL } ;
static const char* const col_attrs[] = { ATTRS, "span", "width", CELLHALIGN, CELLVALIGN, NULL } ;
static const char* const col_elt[] = { "col", NULL } ;
static const char* const edit_attrs[] = { ATTRS, "datetime", "cite", NULL } ;
static const char* const compact_attrs[] = { ATTRS, "compact", NULL } ;
static const char* const dl_contents[] = { "dt", "dd", NULL } ;
static const char* const compact_attr[] = { "compact", NULL } ;
static const char* const label_attr[] = { "label", NULL } ;
static const char* const fieldset_contents[] = { FLOW, "legend" } ;
static const char* const font_attrs[] = { COREATTRS, I18N, "size", "color", "face" , NULL } ;
static const char* const form_contents[] = { HEADING, LIST, INLINE, "pre", "p", "div", "center", "noscript", "noframes", "blockquote", "isindex", "hr", "table", "fieldset", "address", NULL } ;
static const char* const form_attrs[] = { ATTRS, "method", "enctype", "accept", "name", "onsubmit", "onreset", "accept-charset", NULL } ;
static const char* const frame_attrs[] = { COREATTRS, "longdesc", "name", "src", "frameborder", "marginwidth", "marginheight", "noresize", "scrolling" , NULL } ;
static const char* const frameset_attrs[] = { COREATTRS, "rows", "cols", "onload", "onunload", NULL } ;
static const char* const frameset_contents[] = { "frameset", "frame", "noframes", NULL } ;
static const char* const head_attrs[] = { I18N, "profile", NULL } ;
static const char* const head_contents[] = { "title", "isindex", "base", "script", "style", "meta", "link", "object", NULL } ;
static const char* const hr_depr[] = { "align", "noshade", "size", "width", NULL } ;
static const char* const version_attr[] = { "version", NULL } ;
static const char* const html_content[] = { "head", "body", "frameset", NULL } ;
static const char* const iframe_attrs[] = { COREATTRS, "longdesc", "name", "src", "frameborder", "marginwidth", "marginheight", "scrolling", "align", "height", "width", NULL } ;
static const char* const img_attrs[] = { ATTRS, "longdesc", "name", "height", "width", "usemap", "ismap", NULL } ;
static const char* const embed_attrs[] = { COREATTRS, "align", "alt", "border", "code", "codebase", "frameborder", "height", "hidden", "hspace", "name", "palette", "pluginspace", "pluginurl", "src", "type", "units", "vspace", "width", NULL } ;
static const char* const input_attrs[] = { ATTRS, "type", "name", "value", "checked", "disabled", "readonly", "size", "maxlength", "src", "alt", "usemap", "ismap", "tabindex", "accesskey", "onfocus", "onblur", "onselect", "onchange", "accept", NULL } ;
static const char* const prompt_attrs[] = { COREATTRS, I18N, "prompt", NULL } ;
static const char* const label_attrs[] = { ATTRS, "for", "accesskey", "onfocus", "onblur", NULL } ;
static const char* const legend_attrs[] = { ATTRS, "accesskey", NULL } ;
static const char* const align_attr[] = { "align", NULL } ;
static const char* const link_attrs[] = { ATTRS, "charset", "href", "hreflang", "type", "rel", "rev", "media", NULL } ;
static const char* const map_contents[] = { BLOCK, "area", NULL } ;
static const char* const name_attr[] = { "name", NULL } ;
static const char* const action_attr[] = { "action", NULL } ;
static const char* const blockli_elt[] = { BLOCK, "li", NULL } ;
static const char* const meta_attrs[] = { I18N, "http-equiv", "name", "scheme", "charset", NULL } ;
static const char* const content_attr[] = { "content", NULL } ;
static const char* const type_attr[] = { "type", NULL } ;
static const char* const noframes_content[] = { "body", FLOW MODIFIER, NULL } ;
static const char* const object_contents[] = { FLOW, "param", NULL } ;
static const char* const object_attrs[] = { ATTRS, "declare", "classid", "codebase", "data", "type", "codetype", "archive", "standby", "height", "width", "usemap", "name", "tabindex", NULL } ;
static const char* const object_depr[] = { "align", "border", "hspace", "vspace", NULL } ;
static const char* const ol_attrs[] = { "type", "compact", "start", NULL} ;
static const char* const option_elt[] = { "option", NULL } ;
static const char* const optgroup_attrs[] = { ATTRS, "disabled", NULL } ;
static const char* const option_attrs[] = { ATTRS, "disabled", "label", "selected", "value", NULL } ;
static const char* const param_attrs[] = { "id", "value", "valuetype", "type", NULL } ;
static const char* const width_attr[] = { "width", NULL } ;
static const char* const pre_content[] = { PHRASE, "tt", "i", "b", "u", "s", "strike", "a", "br", "script", "map", "q", "span", "bdo", "iframe", NULL } ;
static const char* const script_attrs[] = { "charset", "src", "defer", "event", "for", NULL } ;
static const char* const language_attr[] = { "language", NULL } ;
static const char* const select_content[] = { "optgroup", "option", NULL } ;
static const char* const select_attrs[] = { ATTRS, "name", "size", "multiple", "disabled", "tabindex", "onfocus", "onblur", "onchange", NULL } ;
static const char* const style_attrs[] = { I18N, "media", "title", NULL } ;
static const char* const table_attrs[] = { ATTRS, "summary", "width", "border", "frame", "rules", "cellspacing", "cellpadding", "datapagesize", NULL } ;
static const char* const table_depr[] = { "align", "bgcolor", NULL } ;
static const char* const table_contents[] = { "caption", "col", "colgroup", "thead", "tfoot", "tbody", "tr", NULL} ;
static const char* const tr_elt[] = { "tr", NULL } ;
static const char* const talign_attrs[] = { ATTRS, CELLHALIGN, CELLVALIGN, NULL} ;
static const char* const th_td_depr[] = { "nowrap", "bgcolor", "width", "height", NULL } ;
static const char* const th_td_attr[] = { ATTRS, "abbr", "axis", "headers", "scope", "rowspan", "colspan", CELLHALIGN, CELLVALIGN, NULL } ;
static const char* const textarea_attrs[] = { ATTRS, "name", "disabled", "readonly", "tabindex", "accesskey", "onfocus", "onblur", "onselect", "onchange", NULL } ;
static const char* const tr_contents[] = { "th", "td", NULL } ;
static const char* const bgcolor_attr[] = { "bgcolor", NULL } ;
static const char* const li_elt[] = { "li", NULL } ;
static const char* const ul_depr[] = { "type", "compact", NULL} ;
static const char* const dir_attr[] = { "dir", NULL} ;
#define DECL (const char**)
static const htmlElemDesc
html40ElementTable[] = {
{ "a", 0, 0, 0, 0, 0, 0, 1, "anchor ",
DECL html_inline , NULL , DECL a_attrs , DECL target_attr, NULL
},
{ "abbr", 0, 0, 0, 0, 0, 0, 1, "abbreviated form",
DECL html_inline , NULL , DECL html_attrs, NULL, NULL
},
{ "acronym", 0, 0, 0, 0, 0, 0, 1, "",
DECL html_inline , NULL , DECL html_attrs, NULL, NULL
},
{ "address", 0, 0, 0, 0, 0, 0, 0, "information on author ",
DECL inline_p , NULL , DECL html_attrs, NULL, NULL
},
{ "applet", 0, 0, 0, 0, 1, 1, 2, "java applet ",
DECL flow_param , NULL , NULL , DECL applet_attrs, NULL
},
{ "area", 0, 2, 2, 1, 0, 0, 0, "client-side image map area ",
EMPTY , NULL , DECL area_attrs , DECL target_attr, DECL alt_attr
},
{ "b", 0, 3, 0, 0, 0, 0, 1, "bold text style",
DECL html_inline , NULL , DECL html_attrs, NULL, NULL
},
{ "base", 0, 2, 2, 1, 0, 0, 0, "document base uri ",
EMPTY , NULL , NULL , DECL target_attr, DECL href_attrs
},
{ "basefont", 0, 2, 2, 1, 1, 1, 1, "base font size " ,
EMPTY , NULL , NULL, DECL basefont_attrs, NULL
},
{ "bdo", 0, 0, 0, 0, 0, 0, 1, "i18n bidi over-ride ",
DECL html_inline , NULL , DECL core_i18n_attrs, NULL, DECL dir_attr
},
{ "big", 0, 3, 0, 0, 0, 0, 1, "large text style",
DECL html_inline , NULL , DECL html_attrs, NULL, NULL
},
{ "blockquote", 0, 0, 0, 0, 0, 0, 0, "long quotation ",
DECL html_flow , NULL , DECL quote_attrs , NULL, NULL
},
{ "body", 1, 1, 0, 0, 0, 0, 0, "document body ",
DECL body_contents , "div" , DECL body_attrs, DECL body_depr, NULL
},
{ "br", 0, 2, 2, 1, 0, 0, 1, "forced line break ",
EMPTY , NULL , DECL core_attrs, DECL clear_attrs , NULL
},
{ "button", 0, 0, 0, 0, 0, 0, 2, "push button ",
DECL html_flow MODIFIER , NULL , DECL button_attrs, NULL, NULL
},
{ "caption", 0, 0, 0, 0, 0, 0, 0, "table caption ",
DECL html_inline , NULL , DECL html_attrs, NULL, NULL
},
{ "center", 0, 3, 0, 0, 1, 1, 0, "shorthand for div align=center ",
DECL html_flow , NULL , NULL, DECL html_attrs, NULL
},
{ "cite", 0, 0, 0, 0, 0, 0, 1, "citation",
DECL html_inline , NULL , DECL html_attrs, NULL, NULL
},
{ "code", 0, 0, 0, 0, 0, 0, 1, "computer code fragment",
DECL html_inline , NULL , DECL html_attrs, NULL, NULL
},
{ "col", 0, 2, 2, 1, 0, 0, 0, "table column ",
EMPTY , NULL , DECL col_attrs , NULL, NULL
},
{ "colgroup", 0, 1, 0, 0, 0, 0, 0, "table column group ",
DECL col_elt , "col" , DECL col_attrs , NULL, NULL
},
{ "dd", 0, 1, 0, 0, 0, 0, 0, "definition description ",
DECL html_flow , NULL , DECL html_attrs, NULL, NULL
},
{ "del", 0, 0, 0, 0, 0, 0, 2, "deleted text ",
DECL html_flow , NULL , DECL edit_attrs , NULL, NULL
},
{ "dfn", 0, 0, 0, 0, 0, 0, 1, "instance definition",
DECL html_inline , NULL , DECL html_attrs, NULL, NULL
},
{ "dir", 0, 0, 0, 0, 1, 1, 0, "directory list",
DECL blockli_elt, "li" , NULL, DECL compact_attrs, NULL
},
{ "div", 0, 0, 0, 0, 0, 0, 0, "generic language/style container",
DECL html_flow, NULL, DECL html_attrs, DECL align_attr, NULL
},
{ "dl", 0, 0, 0, 0, 0, 0, 0, "definition list ",
DECL dl_contents , "dd" , DECL html_attrs, DECL compact_attr, NULL
},
{ "dt", 0, 1, 0, 0, 0, 0, 0, "definition term ",
DECL html_inline, NULL, DECL html_attrs, NULL, NULL
},
{ "em", 0, 3, 0, 0, 0, 0, 1, "emphasis",
DECL html_inline, NULL, DECL html_attrs, NULL, NULL
},
{ "embed", 0, 1, 0, 0, 1, 1, 1, "generic embedded object ",
EMPTY, NULL, DECL embed_attrs, NULL, NULL
},
{ "fieldset", 0, 0, 0, 0, 0, 0, 0, "form control group ",
DECL fieldset_contents , NULL, DECL html_attrs, NULL, NULL
},
{ "font", 0, 3, 0, 0, 1, 1, 1, "local change to font ",
DECL html_inline, NULL, NULL, DECL font_attrs, NULL
},
{ "form", 0, 0, 0, 0, 0, 0, 0, "interactive form ",
DECL form_contents, "fieldset", DECL form_attrs , DECL target_attr, DECL action_attr
},
{ "frame", 0, 2, 2, 1, 0, 2, 0, "subwindow " ,
EMPTY, NULL, NULL, DECL frame_attrs, NULL
},
{ "frameset", 0, 0, 0, 0, 0, 2, 0, "window subdivision" ,
DECL frameset_contents, "noframes" , NULL , DECL frameset_attrs, NULL
},
{ "h1", 0, 0, 0, 0, 0, 0, 0, "heading ",
DECL html_inline, NULL, DECL html_attrs, DECL align_attr, NULL
},
{ "h2", 0, 0, 0, 0, 0, 0, 0, "heading ",
DECL html_inline, NULL, DECL html_attrs, DECL align_attr, NULL
},
{ "h3", 0, 0, 0, 0, 0, 0, 0, "heading ",
DECL html_inline, NULL, DECL html_attrs, DECL align_attr, NULL
},
{ "h4", 0, 0, 0, 0, 0, 0, 0, "heading ",
DECL html_inline, NULL, DECL html_attrs, DECL align_attr, NULL
},
{ "h5", 0, 0, 0, 0, 0, 0, 0, "heading ",
DECL html_inline, NULL, DECL html_attrs, DECL align_attr, NULL
},
{ "h6", 0, 0, 0, 0, 0, 0, 0, "heading ",
DECL html_inline, NULL, DECL html_attrs, DECL align_attr, NULL
},
{ "head", 1, 1, 0, 0, 0, 0, 0, "document head ",
DECL head_contents, NULL, DECL head_attrs, NULL, NULL
},
{ "hr", 0, 2, 2, 1, 0, 0, 0, "horizontal rule " ,
EMPTY, NULL, DECL html_attrs, DECL hr_depr, NULL
},
{ "html", 1, 1, 0, 0, 0, 0, 0, "document root element ",
DECL html_content , NULL , DECL i18n_attrs, DECL version_attr, NULL
},
{ "i", 0, 3, 0, 0, 0, 0, 1, "italic text style",
DECL html_inline, NULL, DECL html_attrs, NULL, NULL
},
{ "iframe", 0, 0, 0, 0, 0, 1, 2, "inline subwindow ",
DECL html_flow, NULL, NULL, DECL iframe_attrs, NULL
},
{ "img", 0, 2, 2, 1, 0, 0, 1, "embedded image ",
EMPTY, NULL, DECL img_attrs, DECL align_attr, DECL src_alt_attrs
},
{ "input", 0, 2, 2, 1, 0, 0, 1, "form control ",
EMPTY, NULL, DECL input_attrs , DECL align_attr, NULL
},
{ "ins", 0, 0, 0, 0, 0, 0, 2, "inserted text",
DECL html_flow, NULL, DECL edit_attrs, NULL, NULL
},
{ "isindex", 0, 2, 2, 1, 1, 1, 0, "single line prompt ",
EMPTY, NULL, NULL, DECL prompt_attrs, NULL
},
{ "kbd", 0, 0, 0, 0, 0, 0, 1, "text to be entered by the user",
DECL html_inline, NULL, DECL html_attrs, NULL, NULL
},
{ "label", 0, 0, 0, 0, 0, 0, 1, "form field label text ",
DECL html_inline MODIFIER, NULL, DECL label_attrs , NULL, NULL
},
{ "legend", 0, 0, 0, 0, 0, 0, 0, "fieldset legend ",
DECL html_inline, NULL, DECL legend_attrs , DECL align_attr, NULL
},
{ "li", 0, 1, 1, 0, 0, 0, 0, "list item ",
DECL html_flow, NULL, DECL html_attrs, NULL, NULL
},
{ "link", 0, 2, 2, 1, 0, 0, 0, "a media-independent link ",
EMPTY, NULL, DECL link_attrs, DECL target_attr, NULL
},
{ "map", 0, 0, 0, 0, 0, 0, 2, "client-side image map ",
DECL map_contents , NULL, DECL html_attrs , NULL, DECL name_attr
},
{ "menu", 0, 0, 0, 0, 1, 1, 0, "menu list ",
DECL blockli_elt , NULL, NULL, DECL compact_attrs, NULL
},
{ "meta", 0, 2, 2, 1, 0, 0, 0, "generic metainformation ",
EMPTY, NULL, DECL meta_attrs , NULL , DECL content_attr
},
{ "noframes", 0, 0, 0, 0, 0, 2, 0, "alternate content container for non frame-based rendering ",
DECL noframes_content, "body" , DECL html_attrs, NULL, NULL
},
{ "noscript", 0, 0, 0, 0, 0, 0, 0, "alternate content container for non script-based rendering ",
DECL html_flow, "div", DECL html_attrs, NULL, NULL
},
{ "object", 0, 0, 0, 0, 0, 0, 2, "generic embedded object ",
DECL object_contents , "div" , DECL object_attrs, DECL object_depr, NULL
},
{ "ol", 0, 0, 0, 0, 0, 0, 0, "ordered list ",
DECL li_elt , "li" , DECL html_attrs, DECL ol_attrs, NULL
},
{ "optgroup", 0, 0, 0, 0, 0, 0, 0, "option group ",
DECL option_elt , "option", DECL optgroup_attrs, NULL, DECL label_attr
},
{ "option", 0, 1, 0, 0, 0, 0, 0, "selectable choice " ,
DECL html_pcdata, NULL, DECL option_attrs, NULL, NULL
},
{ "p", 0, 1, 0, 0, 0, 0, 0, "paragraph ",
DECL html_inline, NULL, DECL html_attrs, DECL align_attr, NULL
},
{ "param", 0, 2, 2, 1, 0, 0, 0, "named property value ",
EMPTY, NULL, DECL param_attrs, NULL, DECL name_attr
},
{ "pre", 0, 0, 0, 0, 0, 0, 0, "preformatted text ",
DECL pre_content, NULL, DECL html_attrs, DECL width_attr, NULL
},
{ "q", 0, 0, 0, 0, 0, 0, 1, "short inline quotation ",
DECL html_inline, NULL, DECL quote_attrs, NULL, NULL
},
{ "s", 0, 3, 0, 0, 1, 1, 1, "strike-through text style",
DECL html_inline, NULL, NULL, DECL html_attrs, NULL
},
{ "samp", 0, 0, 0, 0, 0, 0, 1, "sample program output, scripts, etc.",
DECL html_inline, NULL, DECL html_attrs, NULL, NULL
},
{ "script", 0, 0, 0, 0, 0, 0, 2, "script statements ",
DECL html_cdata, NULL, DECL script_attrs, DECL language_attr, DECL type_attr
},
{ "select", 0, 0, 0, 0, 0, 0, 1, "option selector ",
DECL select_content, NULL, DECL select_attrs, NULL, NULL
},
{ "small", 0, 3, 0, 0, 0, 0, 1, "small text style",
DECL html_inline, NULL, DECL html_attrs, NULL, NULL
},
{ "span", 0, 0, 0, 0, 0, 0, 1, "generic language/style container ",
DECL html_inline, NULL, DECL html_attrs, NULL, NULL
},
{ "strike", 0, 3, 0, 0, 1, 1, 1, "strike-through text",
DECL html_inline, NULL, NULL, DECL html_attrs, NULL
},
{ "strong", 0, 3, 0, 0, 0, 0, 1, "strong emphasis",
DECL html_inline, NULL, DECL html_attrs, NULL, NULL
},
{ "style", 0, 0, 0, 0, 0, 0, 0, "style info ",
DECL html_cdata, NULL, DECL style_attrs, NULL, DECL type_attr
},
{ "sub", 0, 3, 0, 0, 0, 0, 1, "subscript",
DECL html_inline, NULL, DECL html_attrs, NULL, NULL
},
{ "sup", 0, 3, 0, 0, 0, 0, 1, "superscript ",
DECL html_inline, NULL, DECL html_attrs, NULL, NULL
},
{ "table", 0, 0, 0, 0, 0, 0, 0, "",
DECL table_contents , "tr" , DECL table_attrs , DECL table_depr, NULL
},
{ "tbody", 1, 0, 0, 0, 0, 0, 0, "table body ",
DECL tr_elt , "tr" , DECL talign_attrs, NULL, NULL
},
{ "td", 0, 0, 0, 0, 0, 0, 0, "table data cell",
DECL html_flow, NULL, DECL th_td_attr, DECL th_td_depr, NULL
},
{ "textarea", 0, 0, 0, 0, 0, 0, 1, "multi-line text field ",
DECL html_pcdata, NULL, DECL textarea_attrs, NULL, DECL rows_cols_attr
},
{ "tfoot", 0, 1, 0, 0, 0, 0, 0, "table footer ",
DECL tr_elt , "tr" , DECL talign_attrs, NULL, NULL
},
{ "th", 0, 1, 0, 0, 0, 0, 0, "table header cell",
DECL html_flow, NULL, DECL th_td_attr, DECL th_td_depr, NULL
},
{ "thead", 0, 1, 0, 0, 0, 0, 0, "table header ",
DECL tr_elt , "tr" , DECL talign_attrs, NULL, NULL
},
{ "title", 0, 0, 0, 0, 0, 0, 0, "document title ",
DECL html_pcdata, NULL, DECL i18n_attrs, NULL, NULL
},
{ "tr", 0, 0, 0, 0, 0, 0, 0, "table row ",
DECL tr_contents , "td" , DECL talign_attrs, DECL bgcolor_attr, NULL
},
{ "tt", 0, 3, 0, 0, 0, 0, 1, "teletype or monospaced text style",
DECL html_inline, NULL, DECL html_attrs, NULL, NULL
},
{ "u", 0, 3, 0, 0, 1, 1, 1, "underlined text style",
DECL html_inline, NULL, NULL, DECL html_attrs, NULL
},
{ "ul", 0, 0, 0, 0, 0, 0, 0, "unordered list ",
DECL li_elt , "li" , DECL html_attrs, DECL ul_depr, NULL
},
{ "var", 0, 0, 0, 0, 0, 0, 1, "instance of a variable or program argument",
DECL html_inline, NULL, DECL html_attrs, NULL, NULL
}
};
typedef struct {
const char *oldTag;
const char *newTag;
} htmlStartCloseEntry;
/*
* start tags that imply the end of current element
*/
static const htmlStartCloseEntry htmlStartClose[] = {
{ "a", "a" },
{ "a", "fieldset" },
{ "a", "table" },
{ "a", "td" },
{ "a", "th" },
{ "address", "dd" },
{ "address", "dl" },
{ "address", "dt" },
{ "address", "form" },