Hugging Face's logo

Datasets:
meddyrat
/
dis-bench

Modalities:
Tabular
Text
Formats:
parquet
Size:
1K - 10K
Libraries:
Datasets
pandas
Polars
Dataset card Data Studio Files
xet
 Community
1
dis-bench / src /php /php-src /ext /dom /html5_serializer.c
meddyrat's picture
meddyrat
Replace repository contents with the original corrected artifact
1e94262
Raw History Blame Contribute Delete
16.1 kB
/*
+----------------------------------------------------------------------+
| Copyright (c) The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| https://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Niels Dossche <nielsdos@php.net> |
+----------------------------------------------------------------------+
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "php.h"
#if defined(HAVE_LIBXML) && defined(HAVE_DOM)
#include "php_dom.h"
#include "html5_serializer.h"
#include "namespace_compat.h"
#include "serialize_common.h"
#include <lexbor/encoding/encoding.h>
/* This file implements the HTML 5 serialization algorithm.
* https://html.spec.whatwg.org/multipage/parsing.html#serialising-html-fragments (Date 2024-12-11)
*/
#define TRY(x) do { if (UNEXPECTED((x) != SUCCESS)) { return FAILURE; } } while (0)
static zend_result dom_html5_serialize_doctype(dom_html5_serialize_context *ctx, const xmlDtd *dtd)
{
TRY(ctx->write_string_len(ctx->application_data, "<!DOCTYPE ", strlen("<!DOCTYPE ")));
TRY(ctx->write_string(ctx->application_data, (const char *) dtd->name));
return ctx->write_string_len(ctx->application_data, ">", strlen(">"));
}
static zend_result dom_html5_serialize_comment(dom_html5_serialize_context *ctx, const xmlNode *node)
{
TRY(ctx->write_string_len(ctx->application_data, "<!--", strlen("<!--")));
if (node->content) {
TRY(ctx->write_string(ctx->application_data, (const char*) node->content));
}
return ctx->write_string_len(ctx->application_data, "-->", strlen("-->"));
}
static zend_result dom_html5_serialize_processing_instruction(dom_html5_serialize_context *ctx, const xmlNode *node)
{
TRY(ctx->write_string_len(ctx->application_data, "<?", strlen("<?")));
TRY(ctx->write_string(ctx->application_data, (const char *) node->name));
TRY(ctx->write_string_len(ctx->application_data, " ", strlen(" ")));
if (node->content) {
TRY(ctx->write_string(ctx->application_data, (const char *) node->content));
}
return ctx->write_string_len(ctx->application_data, ">", strlen(">"));
}
static zend_result dom_html5_serialize_entity_ref(dom_html5_serialize_context *ctx, const xmlNode *node)
{
TRY(ctx->write_string_len(ctx->application_data, "&", strlen("&")));
TRY(ctx->write_string(ctx->application_data, (const char *) node->name));
return ctx->write_string_len(ctx->application_data, ";", strlen(";"));
}
/* https://html.spec.whatwg.org/multipage/parsing.html#escapingString */
static zend_result dom_html5_escape_string(dom_html5_serialize_context *ctx, const char *content, bool attribute_mode)
{
const char *last_output = content;
/* Note: uses UTF-8 internally, so <C2 A0> indicates a non-breaking space */
const char *mask = attribute_mode ? "&\xC2\"" : "&\xC2<>";
while (true) {
size_t chunk_length = strcspn(content, mask);
content += chunk_length;
if (*content == '\0') {
break;
}
switch (*content) {
/* Step 1 */
case '&': {
TRY(ctx->write_string_len(ctx->application_data, last_output, content - last_output));
TRY(ctx->write_string_len(ctx->application_data, "&amp;", strlen("&amp;")));
last_output = content + 1;
break;
}
/* Step 2 (non-breaking space) (note: uses UTF-8 internally) */
case '\xC2': {
if (content[1] == '\xA0') {
TRY(ctx->write_string_len(ctx->application_data, last_output, content - last_output));
TRY(ctx->write_string_len(ctx->application_data, "&nbsp;", strlen("&nbsp;")));
content++; /* Consume A0 too */
last_output = content + 1;
}
break;
}
/* Step 3 */
case '"': {
TRY(ctx->write_string_len(ctx->application_data, last_output, content - last_output));
TRY(ctx->write_string_len(ctx->application_data, "&quot;", strlen("&quot;")));
last_output = content + 1;
break;
}
/* Step 4 */
case '<': {
TRY(ctx->write_string_len(ctx->application_data, last_output, content - last_output));
TRY(ctx->write_string_len(ctx->application_data, "&lt;", strlen("&lt;")));
last_output = content + 1;
break;
}
case '>': {
TRY(ctx->write_string_len(ctx->application_data, last_output, content - last_output));
TRY(ctx->write_string_len(ctx->application_data, "&gt;", strlen("&gt;")));
last_output = content + 1;
break;
}
}
content++;
}
return ctx->write_string_len(ctx->application_data, last_output, content - last_output);
}
static zend_result dom_html5_serialize_text_node(dom_html5_serialize_context *ctx, const xmlNode *node)
{
if (!node->content) {
return SUCCESS;
}
const xmlNode *parent = node->parent;
if (parent != NULL && parent->type == XML_ELEMENT_NODE && php_dom_ns_is_fast(parent, php_dom_ns_is_html_magic_token)) {
size_t name_length = strlen((const char *) parent->name);
/* Spec tells us to only emit noscript content as-is if scripting is enabled.
* However, the user agent (PHP) does not support (JS) scripting.
* Furthermore, if actually consumed by a browser then we should err on the safe side and not emit the content as-is. */
if (dom_local_name_compare_ex(parent, "style", strlen("style"), name_length)
|| dom_local_name_compare_ex(parent, "script", strlen("script"), name_length)
|| dom_local_name_compare_ex(parent, "xmp", strlen("xmp"), name_length)
|| dom_local_name_compare_ex(parent, "iframe", strlen("iframe"), name_length)
|| dom_local_name_compare_ex(parent, "noembed", strlen("noembed"), name_length)
|| dom_local_name_compare_ex(parent, "noframes", strlen("noframes"), name_length)
|| dom_local_name_compare_ex(parent, "plaintext", strlen("plaintext"), name_length)) {
return ctx->write_string(ctx->application_data, (const char *) node->content);
}
}
return dom_html5_escape_string(ctx, (const char *) node->content, false);
}
static zend_result dom_html5_serialize_element_tag_name(dom_html5_serialize_context *ctx, const xmlNode *node)
{
/* Note: it is not the serializer's responsibility to care about uppercase/lowercase (see createElement() note) */
if (node->ns != NULL && node->ns->prefix != NULL
&& !(php_dom_ns_is_fast(node, php_dom_ns_is_html_magic_token) || php_dom_ns_is_fast(node, php_dom_ns_is_mathml_magic_token) || php_dom_ns_is_fast(node, php_dom_ns_is_svg_magic_token))) {
TRY(ctx->write_string(ctx->application_data, (const char *) node->ns->prefix));
TRY(ctx->write_string_len(ctx->application_data, ":", strlen(":")));
}
return ctx->write_string(ctx->application_data, (const char *) node->name);
}
static zend_result dom_html5_serialize_element_start(dom_html5_serialize_context *ctx, const xmlNode *node)
{
TRY(ctx->write_string_len(ctx->application_data, "<", strlen("<")));
TRY(dom_html5_serialize_element_tag_name(ctx, node));
/* We don't support the "is" value during element creation, so no handling here. */
for (const xmlAttr *attr = node->properties; attr; attr = attr->next) {
TRY(ctx->write_string_len(ctx->application_data, " ", strlen(" ")));
if (attr->ns == NULL) {
TRY(ctx->write_string(ctx->application_data, (const char *) attr->name));
} else {
if (php_dom_ns_is_fast((const xmlNode *) attr, php_dom_ns_is_xml_magic_token)) {
TRY(ctx->write_string_len(ctx->application_data, "xml:", strlen("xml:")));
TRY(ctx->write_string(ctx->application_data, (const char *) attr->name));
} else if (php_dom_ns_is_fast((const xmlNode *) attr, php_dom_ns_is_xmlns_magic_token)) {
/* Compatibility for real attributes */
if (strcmp((const char *) attr->name, "xmlns") == 0) {
TRY(ctx->write_string_len(ctx->application_data, "xmlns", strlen("xmlns")));
} else {
TRY(ctx->write_string_len(ctx->application_data, "xmlns:", strlen("xmlns:")));
TRY(ctx->write_string(ctx->application_data, (const char *) attr->name));
}
} else if (php_dom_ns_is_fast((const xmlNode *) attr, php_dom_ns_is_xlink_magic_token)) {
TRY(ctx->write_string_len(ctx->application_data, "xlink:", strlen("xlink:")));
TRY(ctx->write_string(ctx->application_data, (const char *) attr->name));
} else if (attr->ns->prefix == NULL) {
TRY(ctx->write_string(ctx->application_data, (const char *) attr->name));
} else {
TRY(ctx->write_string(ctx->application_data, (const char *) attr->ns->prefix));
TRY(ctx->write_string_len(ctx->application_data, ":", strlen(":")));
TRY(ctx->write_string(ctx->application_data, (const char *) attr->name));
}
}
TRY(ctx->write_string_len(ctx->application_data, "=\"", strlen("=\"")));
for (xmlNodePtr child = attr->children; child != NULL; child = child->next) {
if (child->type == XML_TEXT_NODE) {
if (child->content != NULL) {
TRY(dom_html5_escape_string(ctx, (const char *) child->content, true));
}
} else if (child->type == XML_ENTITY_REF_NODE) {
TRY(ctx->write_string_len(ctx->application_data, "&", strlen("&")));
TRY(dom_html5_escape_string(ctx, (const char *) child->name, true));
TRY(ctx->write_string_len(ctx->application_data, ";", strlen(";")));
}
}
TRY(ctx->write_string_len(ctx->application_data, "\"", strlen("\"")));
}
return ctx->write_string_len(ctx->application_data, ">", strlen(">"));
/* Note: "continue on to the next child if the element is void" is handled in the iteration and dom_html5_serialize_element_end() */
}
/* https://html.spec.whatwg.org/multipage/syntax.html#void-elements
* https://html.spec.whatwg.org/multipage/parsing.html#serializes-as-void */
static bool dom_html5_serializes_as_void(const xmlNode *node)
{
if (php_dom_ns_is_fast(node, php_dom_ns_is_html_magic_token)) {
size_t name_length = strlen((const char *) node->name);
if (/* These are the void elements from https://html.spec.whatwg.org/multipage/syntax.html#void-elements */
dom_local_name_compare_ex(node, "area", strlen("area"), name_length)
|| dom_local_name_compare_ex(node, "base", strlen("base"), name_length)
|| dom_local_name_compare_ex(node, "br", strlen("br"), name_length)
|| dom_local_name_compare_ex(node, "col", strlen("col"), name_length)
|| dom_local_name_compare_ex(node, "embed", strlen("embed"), name_length)
|| dom_local_name_compare_ex(node, "hr", strlen("hr"), name_length)
|| dom_local_name_compare_ex(node, "img", strlen("img"), name_length)
|| dom_local_name_compare_ex(node, "input", strlen("input"), name_length)
|| dom_local_name_compare_ex(node, "link", strlen("link"), name_length)
|| dom_local_name_compare_ex(node, "meta", strlen("meta"), name_length)
|| dom_local_name_compare_ex(node, "source", strlen("source"), name_length)
|| dom_local_name_compare_ex(node, "track", strlen("track"), name_length)
|| dom_local_name_compare_ex(node, "wbr", strlen("wbr"), name_length)
/* These are the additional names from https://html.spec.whatwg.org/multipage/parsing.html#serializes-as-void */
|| dom_local_name_compare_ex(node, "basefont", strlen("basefont"), name_length)
|| dom_local_name_compare_ex(node, "bgsound", strlen("bgsound"), name_length)
|| dom_local_name_compare_ex(node, "frame", strlen("frame"), name_length)
|| dom_local_name_compare_ex(node, "keygen", strlen("keygen"), name_length)
|| dom_local_name_compare_ex(node, "param", strlen("param"), name_length)) {
return true;
}
}
return false;
}
static zend_result dom_html5_serialize_element_end(dom_html5_serialize_context *ctx, const xmlNode *node)
{
if (!dom_html5_serializes_as_void(node)) {
TRY(ctx->write_string_len(ctx->application_data, "</", strlen("</")));
TRY(dom_html5_serialize_element_tag_name(ctx, node));
return ctx->write_string_len(ctx->application_data, ">", strlen(">"));
}
return SUCCESS;
}
/* https://html.spec.whatwg.org/multipage/parsing.html#html-fragment-serialisation-algorithm */
static zend_result dom_html5_serialize_node(dom_html5_serialize_context *ctx, const xmlNode *node, const xmlNode *bound)
{
while (node != NULL) {
switch (node->type) {
case XML_DTD_NODE: {
TRY(dom_html5_serialize_doctype(ctx, (const xmlDtd *) node));
break;
}
case XML_CDATA_SECTION_NODE:
case XML_TEXT_NODE: {
TRY(dom_html5_serialize_text_node(ctx, node));
break;
}
case XML_PI_NODE: {
TRY(dom_html5_serialize_processing_instruction(ctx, node));
break;
}
case XML_COMMENT_NODE: {
TRY(dom_html5_serialize_comment(ctx, node));
break;
}
case XML_ELEMENT_NODE: {
TRY(dom_html5_serialize_element_start(ctx, node));
const xmlNode *children = node->children;
if (php_dom_ns_is_fast(node, php_dom_ns_is_html_magic_token) && xmlStrEqual(node->name, BAD_CAST "template")) {
children = php_dom_retrieve_templated_content(ctx->private_data, node);
}
if (children) {
if (!dom_html5_serializes_as_void(node)) {
node = children;
continue;
}
} else {
/* Not descended, so wouldn't put the closing tag as it's normally only done when going back upwards. */
TRY(dom_html5_serialize_element_end(ctx, node));
}
break;
}
case XML_DOCUMENT_FRAG_NODE: {
if (node->children) {
node = node->children;
continue;
}
break;
}
/* Only exists for compatibility with XML and old DOM. */
case XML_ENTITY_REF_NODE: {
TRY(dom_html5_serialize_entity_ref(ctx, node));
break;
}
default:
break;
}
if (node->next) {
node = node->next;
} else {
/* Go upwards, until we find a parent node with a next sibling, or until we hit the bound. */
do {
node = node->parent;
if (node == bound) {
return SUCCESS;
}
if (node->type == XML_ELEMENT_NODE) {
TRY(dom_html5_serialize_element_end(ctx, node));
}
} while (node->next == NULL);
node = node->next;
}
}
return SUCCESS;
}
/* Note: this serializes the _children_, excluding the node itself! */
zend_result dom_html5_serialize(dom_html5_serialize_context *ctx, const xmlNode *node)
{
/* Step 1. Note that this algorithm serializes children. Only elements, documents, and fragments can have children. */
if (node->type != XML_ELEMENT_NODE
&& node->type != XML_DOCUMENT_FRAG_NODE
&& node->type != XML_DOCUMENT_NODE
&& node->type != XML_HTML_DOCUMENT_NODE) {
return SUCCESS;
}
if (node->type == XML_ELEMENT_NODE && dom_html5_serializes_as_void(node)) {
return SUCCESS;
}
/* Step 2 not needed because we're not using a string to store the serialized data */
/* Step 3. If the node is a template element, then let the node instead be the template element's template contents (a DocumentFragment node). */
xmlNodePtr children = php_dom_retrieve_templated_content(ctx->private_data, node);
if (!children) {
children = node->children;
}
/* Step 4 concerns shadow roots, but we don't have these, so skip. */
/* Step 5 */
return dom_html5_serialize_node(ctx, children, node);
}
/* Variant on the above that is equivalent to the "outer HTML". */
zend_result dom_html5_serialize_outer(dom_html5_serialize_context *ctx, const xmlNode *node)
{
if (node->type == XML_DOCUMENT_NODE || node->type == XML_HTML_DOCUMENT_NODE || node->type == XML_DOCUMENT_FRAG_NODE) {
node = node->children;
if (!node) {
return SUCCESS;
}
return dom_html5_serialize_node(ctx, node, node->parent);
} else {
xmlNodePtr old_next = node->next;
((xmlNodePtr) node)->next = NULL;
zend_result result = dom_html5_serialize_node(ctx, node, node->parent);
((xmlNodePtr) node)->next = old_next;
return result;
}
}
#endif /* HAVE_LIBXML && HAVE_DOM */