/*
* This file is part of Hubbub.
* Licensed under the MIT License,
* http://www.opensource.org/licenses/mit-license.php
* Copyright 2008 John-Mark Bell <jmb@netsurf-browser.org>
*/
#include <assert.h>
#include <string.h>
#include <parserutils/charset/mibenum.h>
#include "treebuilder/modes.h"
#include "treebuilder/internal.h"
#include "treebuilder/treebuilder.h"
#include "charset/detect.h"
#include "utils/utils.h"
#include "utils/string.h"
/**
* Process a meta tag as if "in head".
*
* \param treebuilder The treebuilder instance
* \param token The token to process
*/
static hubbub_error process_meta_in_head(hubbub_treebuilder *treebuilder,
const hubbub_token *token)
{
static uint16_t utf16, utf16be, utf16le;
uint16_t charset_enc = 0;
uint16_t content_type_enc = 0;
size_t i;
hubbub_error err = HUBBUB_OK;
err = insert_element(treebuilder, &token->data.tag, false);
if (err != HUBBUB_OK)
return err;
/** \todo ack sc flag */
if (treebuilder->tree_handler->encoding_change == NULL)
return err;
/* Grab UTF-16 MIBenums */
if (utf16 == 0) {
utf16 = parserutils_charset_mibenum_from_name(
"utf-16", SLEN("utf-16"));
utf16be = parserutils_charset_mibenum_from_name(
"utf-16be", SLEN("utf-16be"));
utf16le = parserutils_charset_mibenum_from_name(
"utf-16le", SLEN("utf-16le"));
assert(utf16
!= 0 && utf16be
!= 0 && utf16le
!= 0); }
for (i = 0; i < token->data.tag.n_attributes; i++) {
hubbub_attribute *attr = &token->data.tag.attributes[i];
if (hubbub_string_match(attr->name.ptr, attr->name.len,
(const uint8_t *) "charset",
SLEN("charset")) == true) {
/* Extract charset */
charset_enc = parserutils_charset_mibenum_from_name(
(const char *) attr->value.ptr,
attr->value.len);
} else if (hubbub_string_match(attr->name.ptr, attr->name.len,
(const uint8_t *) "content",
SLEN("content")) == true) {
/* Extract charset from Content-Type */
content_type_enc = hubbub_charset_parse_content(
attr->value.ptr, attr->value.len);
}
}
/* Fall back, if necessary */
if (charset_enc == 0 && content_type_enc != 0)
charset_enc = content_type_enc;
if (charset_enc != 0) {
const char *name;
hubbub_charset_fix_charset(&charset_enc);
/* Change UTF-16 to UTF-8 */
if (charset_enc == utf16le || charset_enc == utf16be ||
charset_enc == utf16) {
charset_enc = parserutils_charset_mibenum_from_name(
"UTF-8", SLEN("UTF-8"));
}
name = parserutils_charset_mibenum_to_name(charset_enc);
err = treebuilder->tree_handler->encoding_change(
treebuilder->tree_handler->ctx, name);
}
return err;
}
/**
* Handle token in "in head" insertion mode
*
* \param treebuilder The treebuilder instance
* \param token The token to handle
* \return True to reprocess token, false otherwise
*/
hubbub_error handle_in_head(hubbub_treebuilder *treebuilder,
const hubbub_token *token)
{
hubbub_error err = HUBBUB_OK;
bool handled = false;
switch (token->type) {
case HUBBUB_TOKEN_CHARACTER:
err = process_characters_expect_whitespace(treebuilder,
token, true);
break;
case HUBBUB_TOKEN_COMMENT:
err = process_comment_append(treebuilder, token,
treebuilder->context.element_stack[
treebuilder->context.current_node].node);
break;
case HUBBUB_TOKEN_DOCTYPE:
/** \todo parse error */
break;
case HUBBUB_TOKEN_START_TAG:
{
element_type type = element_type_from_name(treebuilder,
&token->data.tag.name);
if (type == HTML) {
/* Process as if "in body" */
err = handle_in_body(treebuilder, token);
} else if (type == BASE || type == COMMAND || type == LINK) {
err = insert_element(treebuilder, &token->data.tag,
false);
/** \todo ack sc flag */
} else if (type == META) {
err = process_meta_in_head(treebuilder, token);
} else if (type == TITLE) {
err = parse_generic_rcdata(treebuilder, token, true);
} else if (type == NOFRAMES || type == STYLE) {
err = parse_generic_rcdata(treebuilder, token, false);
} else if (type == NOSCRIPT) {
if (treebuilder->context.enable_scripting) {
err = parse_generic_rcdata(treebuilder, token,
false);
} else {
err = insert_element(treebuilder,
&token->data.tag, true);
if (err != HUBBUB_OK)
return err;
treebuilder->context.mode = IN_HEAD_NOSCRIPT;
}
} else if (type == SCRIPT) {
/** \todo need to ensure that the client callback
* sets the parser-inserted/already-executed script
* flags. */
err = parse_generic_rcdata(treebuilder, token, false);
} else if (type == HEAD) {
/** \todo parse error */
} else {
err = HUBBUB_REPROCESS;
}
}
break;
case HUBBUB_TOKEN_END_TAG:
{
element_type type = element_type_from_name(treebuilder,
&token->data.tag.name);
if (type == HEAD) {
handled = true;
} else if (type == HTML || type == BODY || type == BR) {
err = HUBBUB_REPROCESS;
} /** \todo parse error */
}
break;
case HUBBUB_TOKEN_EOF:
err = HUBBUB_REPROCESS;
break;
}
if (handled || err == HUBBUB_REPROCESS) {
hubbub_ns ns;
element_type otype;
void *node;
element_stack_pop(treebuilder, &ns, &otype, &node);
treebuilder->tree_handler->unref_node(
treebuilder->tree_handler->ctx,
node);
treebuilder->context.mode = AFTER_HEAD;
}
return err;
}