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/*
* This file is part of Hubbub.
* Licensed under the MIT License,
* http://www.opensource.org/licenses/mit-license.php
* Copyright 2008 Andrew Sidwell <takkaria@netsurf-browser.org>
*/
#include <assert.h>
#include <string.h>
#include "treebuilder/modes.h"
#include "treebuilder/internal.h"
#include "treebuilder/treebuilder.h"
#include "utils/utils.h"
/**
* Returns true iff there is an element in scope that has a namespace other
* than the HTML namespace.
*/
static bool element_in_scope_in_non_html_ns(hubbub_treebuilder *treebuilder)
{
element_context *stack = treebuilder->context.element_stack;
uint32_t node;
assert((signed) treebuilder->context.current_node >= 0);
for (node = treebuilder->context.current_node; node > 0; node--) {
element_type node_type = stack[node].type;
/* The list of element types given in the spec here are the
* scoping elements excluding TABLE and HTML. TABLE is handled
* in the previous conditional and HTML should only occur
* as the first node in the stack, which is never processed
* in this loop. */
if (node_type == TABLE || is_scoping_element(node_type))
break;
if (stack[node].ns != HUBBUB_NS_HTML)
return true;
}
return false;
}
/**
* Process a token as if in the secondary insertion mode.
*/
static void process_as_in_secondary(hubbub_treebuilder *treebuilder,
const hubbub_token *token)
{
/* Because we don't support calling insertion modes directly,
* instead we set the current mode to the secondary mode,
* call the token handler, and then reset the mode afterward
* as long as it's unchanged, as this has the same effect */
treebuilder->context.mode = treebuilder->context.second_mode;
hubbub_treebuilder_token_handler(token, treebuilder);
if (treebuilder->context.mode == treebuilder->context.second_mode)
treebuilder->context.mode = IN_FOREIGN_CONTENT;
if (treebuilder->context.mode == IN_FOREIGN_CONTENT &&
!element_in_scope_in_non_html_ns(treebuilder)) {
treebuilder->context.mode =
treebuilder->context.second_mode;
}
}
/**
* Break out of foreign content as a result of certain start tags or EOF.
*/
static void foreign_break_out(hubbub_treebuilder *treebuilder)
{
element_context *stack = treebuilder->context.element_stack;
/** \todo parse error */
while (stack[treebuilder->context.current_node].ns !=
HUBBUB_NS_HTML) {
hubbub_ns ns;
element_type type;
void *node;
element_stack_pop(treebuilder, &ns, &type, &node);
treebuilder->tree_handler->unref_node(
treebuilder->tree_handler->ctx,
node);
}
treebuilder->context.mode = treebuilder->context.second_mode;
}
/**
* Handle tokens in "in foreign content" insertion mode
*
* \param treebuilder The treebuilder instance
* \param token The token to process
* \return True to reprocess the token, false otherwise
*/
bool handle_in_foreign_content(hubbub_treebuilder *treebuilder,
const hubbub_token *token)
{
bool reprocess = false;
switch (token->type) {
case HUBBUB_TOKEN_CHARACTER:
append_text(treebuilder, &token->data.character);
break;
case HUBBUB_TOKEN_COMMENT:
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:
{
hubbub_ns cur_node_ns = treebuilder->context.element_stack[
treebuilder->context.current_node].ns;
element_type cur_node = current_node(treebuilder);
element_type type = element_type_from_name(treebuilder,
&token->data.tag.name);
if (cur_node_ns == HUBBUB_NS_HTML ||
(cur_node_ns == HUBBUB_NS_MATHML &&
(type != MGLYPH && type != MALIGNMARK) &&
(cur_node == MI || cur_node == MO ||
cur_node == MN || cur_node == MS ||
cur_node == MTEXT))) {
process_as_in_secondary(treebuilder, token);
} else if (type == B || type == BIG || type == BLOCKQUOTE ||
type == BODY || type == BR || type == CENTER ||
type == CODE || type == DD || type == DIV ||
type == DL || type == DT || type == EM ||
type == EMBED || type == FONT || type == H1 ||
type == H2 || type == H3 || type == H4 ||
type == H5 || type == H6 || type == HEAD ||
type == HR || type == I || type == IMG ||
type == LI || type == LISTING ||
type == MENU || type == META || type == NOBR ||
type == OL || type == P || type == PRE ||
type == RUBY || type == S || type == SMALL ||
type == SPAN || type == STRONG ||
type == STRIKE || type == SUB || type == SUP ||
type == TABLE || type == TT || type == U ||
type == UL || type == VAR) {
foreign_break_out(treebuilder);
reprocess = true;
} else {
hubbub_tag tag = token->data.tag;
adjust_foreign_attributes(treebuilder, &tag);
/* Set to the right namespace and insert */
tag.ns = cur_node_ns;
if (token->data.tag.self_closing) {
insert_element_no_push(treebuilder, &tag);
/** \todo ack sc flag */
} else {
insert_element(treebuilder, &tag);
}
}
}
break;
case HUBBUB_TOKEN_END_TAG:
process_as_in_secondary(treebuilder, token);
break;
case HUBBUB_TOKEN_EOF:
foreign_break_out(treebuilder);
reprocess = true;
break;
}
return reprocess;
}
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