/*

 * HTMLtree.c : implementation of access function for an HTML tree.

 *

 * See Copyright for the status of this software.

 *

 * daniel@veillard.com

 */

#define IN_LIBXML

#include "libxml.h"

#ifdef LIBXML_HTML_ENABLED

#include <string.h> /* for memset() only ! */

#include <ctype.h>

#include <stdlib.h>

#include <libxml/xmlmemory.h>

#include <libxml/HTMLparser.h>

#include <libxml/HTMLtree.h>

#include <libxml/entities.h>

#include <libxml/valid.h>

#include <libxml/xmlerror.h>

#include <libxml/parserInternals.h>

#include <libxml/globals.h>

#include <libxml/uri.h>

#include "buf.h"

/************************************************************************

 *                  *

 *    Getting/Setting encoding meta tags      *

 *                  *

 ************************************************************************/

/**

 * htmlGetMetaEncoding:

 * @doc:  the document

 *

 * Encoding definition lookup in the Meta tags

 *

 * Returns the current encoding as flagged in the HTML source

 */

const xmlChar *

htmlGetMetaEncoding(htmlDocPtr doc) {

    htmlNodePtr cur;

    const xmlChar *content;

    const xmlChar *encoding;

    if (doc == NULL)

  return(NULL);

    cur = doc->children;

    /*

     * Search the html

     */

    while (cur != NULL) {

  if ((cur->type == XML_ELEMENT_NODE) && (cur->name != NULL)) {

      if (xmlStrEqual(cur->name, BAD_CAST"html"))

    break;

      if (xmlStrEqual(cur->name, BAD_CAST"head"))

    goto found_head;

      if (xmlStrEqual(cur->name, BAD_CAST"meta"))

    goto found_meta;

  }

  cur = cur->next;

    }

    if (cur == NULL)

  return(NULL);

    cur = cur->children;

    /*

     * Search the head

     */

    while (cur != NULL) {

  if ((cur->type == XML_ELEMENT_NODE) && (cur->name != NULL)) {

      if (xmlStrEqual(cur->name, BAD_CAST"head"))

    break;

      if (xmlStrEqual(cur->name, BAD_CAST"meta"))

    goto found_meta;

  }

  cur = cur->next;

    }

    if (cur == NULL)

  return(NULL);

found_head:

    cur = cur->children;

    /*

     * Search the meta elements

     */

found_meta:

    while (cur != NULL) {

  if ((cur->type == XML_ELEMENT_NODE) && (cur->name != NULL)) {

      if (xmlStrEqual(cur->name, BAD_CAST"meta")) {

    xmlAttrPtr attr = cur->properties;

    int http;

    const xmlChar *value;

    content = NULL;

    http = 0;

    while (attr != NULL) {

        if ((attr->children != NULL) &&

            (attr->children->type == XML_TEXT_NODE) &&

            (attr->children->next == NULL)) {

      value = attr->children->content;

      if ((!xmlStrcasecmp(attr->name, BAD_CAST"http-equiv"))

       && (!xmlStrcasecmp(value, BAD_CAST"Content-Type")))

          http = 1;

      else if ((value != NULL)

       && (!xmlStrcasecmp(attr->name, BAD_CAST"content")))

          content = value;

      if ((http != 0) && (content != NULL))

          goto found_content;

        }

        attr = attr->next;

    }

      }

  }

  cur = cur->next;

    }

    return(NULL);

found_content:

    encoding = xmlStrstr(content, BAD_CAST"charset=");

    if (encoding == NULL)

  encoding = xmlStrstr(content, BAD_CAST"Charset=");

    if (encoding == NULL)

  encoding = xmlStrstr(content, BAD_CAST"CHARSET=");

    if (encoding != NULL) {

  encoding += 8;

    } else {

  encoding = xmlStrstr(content, BAD_CAST"charset =");

  if (encoding == NULL)

      encoding = xmlStrstr(content, BAD_CAST"Charset =");

  if (encoding == NULL)

      encoding = xmlStrstr(content, BAD_CAST"CHARSET =");

  if (encoding != NULL)

      encoding += 9;

    }

    if (encoding != NULL) {

  while ((*encoding == ' ') || (*encoding == '\t')) encoding++;

    }

    return(encoding);

}

/**

 * htmlSetMetaEncoding:

 * @doc:  the document

 * @encoding:  the encoding string

 *

 * Sets the current encoding in the Meta tags

 * NOTE: this will not change the document content encoding, just

 * the META flag associated.

 *

 * Returns 0 in case of success and -1 in case of error

 */

int

htmlSetMetaEncoding(htmlDocPtr doc, const xmlChar *encoding) {

    htmlNodePtr cur, meta = NULL, head = NULL;

    const xmlChar *content = NULL;

    char newcontent[100];

    newcontent[0] = 0;

    if (doc == NULL)

  return(-1);

    /* html isn't a real encoding it's just libxml2 way to get entities */

    if (!xmlStrcasecmp(encoding, BAD_CAST "html"))

        return(-1);

    if (encoding != NULL) {

  snprintf(newcontent, sizeof(newcontent), "text/html; charset=%s",

                (char *)encoding);

  newcontent[sizeof(newcontent) - 1] = 0;

    }

    cur = doc->children;

    /*

     * Search the html

     */

    while (cur != NULL) {

  if ((cur->type == XML_ELEMENT_NODE) && (cur->name != NULL)) {

      if (xmlStrcasecmp(cur->name, BAD_CAST"html") == 0)

    break;

      if (xmlStrcasecmp(cur->name, BAD_CAST"head") == 0)

    goto found_head;

      if (xmlStrcasecmp(cur->name, BAD_CAST"meta") == 0)

    goto found_meta;

  }

  cur = cur->next;

    }

    if (cur == NULL)

  return(-1);

    cur = cur->children;

    /*

     * Search the head

     */

    while (cur != NULL) {

  if ((cur->type == XML_ELEMENT_NODE) && (cur->name != NULL)) {

      if (xmlStrcasecmp(cur->name, BAD_CAST"head") == 0)

    break;

      if (xmlStrcasecmp(cur->name, BAD_CAST"meta") == 0) {

                head = cur->parent;

    goto found_meta;

            }

  }

  cur = cur->next;

    }

    if (cur == NULL)

  return(-1);

found_head:

    head = cur;

    if (cur->children == NULL)

        goto create;

    cur = cur->children;

found_meta:

    /*

     * Search and update all the remaining the meta elements carrying

     * encoding information

     */

    while (cur != NULL) {

  if ((cur->type == XML_ELEMENT_NODE) && (cur->name != NULL)) {

      if (xmlStrcasecmp(cur->name, BAD_CAST"meta") == 0) {

    xmlAttrPtr attr = cur->properties;

    int http;

    const xmlChar *value;

    content = NULL;

    http = 0;

    while (attr != NULL) {

        if ((attr->children != NULL) &&

            (attr->children->type == XML_TEXT_NODE) &&

            (attr->children->next == NULL)) {

      value = attr->children->content;

      if ((!xmlStrcasecmp(attr->name, BAD_CAST"http-equiv"))

       && (!xmlStrcasecmp(value, BAD_CAST"Content-Type")))

          http = 1;

      else

                        {

                           if ((value != NULL) &&

                               (!xmlStrcasecmp(attr->name, BAD_CAST"content")))

             content = value;

                        }

            if ((http != 0) && (content != NULL))

          break;

        }

        attr = attr->next;

    }

    if ((http != 0) && (content != NULL)) {

        meta = cur;

        break;

    }

      }

  }

  cur = cur->next;

    }

create:

    if (meta == NULL) {

        if ((encoding != NULL) && (head != NULL)) {

            /*

             * Create a new Meta element with the right attributes

             */

            meta = xmlNewDocNode(doc, NULL, BAD_CAST"meta", NULL);

            if (head->children == NULL)

                xmlAddChild(head, meta);

            else

                xmlAddPrevSibling(head->children, meta);

            xmlNewProp(meta, BAD_CAST"http-equiv", BAD_CAST"Content-Type");

            xmlNewProp(meta, BAD_CAST"content", BAD_CAST newcontent);

        }

    } else {

        /* remove the meta tag if NULL is passed */

        if (encoding == NULL) {

            xmlUnlinkNode(meta);

            xmlFreeNode(meta);

        }

        /* change the document only if there is a real encoding change */

        else if (xmlStrcasestr(content, encoding) == NULL) {

            xmlSetProp(meta, BAD_CAST"content", BAD_CAST newcontent);

        }

    }

    return(0);

}

/**

 * booleanHTMLAttrs:

 *

 * These are the HTML attributes which will be output

 * in minimized form, i.e. <option selected="selected"> will be

 * output as <option selected>, as per XSLT 1.0 16.2 "HTML Output Method"

 *

 */

static const char* const htmlBooleanAttrs[] = {

  "checked", "compact", "declare", "defer", "disabled", "ismap",

  "multiple", "nohref", "noresize", "noshade", "nowrap", "readonly",

  "selected", NULL

};

/**

 * htmlIsBooleanAttr:

 * @name:  the name of the attribute to check

 *

 * Determine if a given attribute is a boolean attribute.

 *

 * returns: false if the attribute is not boolean, true otherwise.

 */

int

htmlIsBooleanAttr(const xmlChar *name)

{

    int i = 0;

    while (htmlBooleanAttrs[i] != NULL) {

        if (xmlStrcasecmp((const xmlChar *)htmlBooleanAttrs[i], name) == 0)

            return 1;

        i++;

    }

    return 0;

}

#ifdef LIBXML_OUTPUT_ENABLED

/*

 * private routine exported from xmlIO.c

 */

xmlOutputBufferPtr

xmlAllocOutputBufferInternal(xmlCharEncodingHandlerPtr encoder);

/************************************************************************

 *                  *

 *      Output error handlers       *

 *                  *

 ************************************************************************/

/**

 * htmlSaveErrMemory:

 * @extra:  extra information

 *

 * Handle an out of memory condition

 */

static void

htmlSaveErrMemory(const char *extra)

{

    __xmlSimpleError(XML_FROM_OUTPUT, XML_ERR_NO_MEMORY, NULL, NULL, extra);

}

/**

 * htmlSaveErr:

 * @code:  the error number

 * @node:  the location of the error.

 * @extra:  extra information

 *

 * Handle an out of memory condition

 */

static void

htmlSaveErr(int code, xmlNodePtr node, const char *extra)

{

    const char *msg = NULL;

    switch(code) {

        case XML_SAVE_NOT_UTF8:

      msg = "string is not in UTF-8\n";

      break;

  case XML_SAVE_CHAR_INVALID:

      msg = "invalid character value\n";

      break;

  case XML_SAVE_UNKNOWN_ENCODING:

      msg = "unknown encoding %s\n";

      break;

  case XML_SAVE_NO_DOCTYPE:

      msg = "HTML has no DOCTYPE\n";

      break;

  default:

      msg = "unexpected error number\n";

    }

    __xmlSimpleError(XML_FROM_OUTPUT, code, node, msg, extra);

}

/************************************************************************

 *                  *

 *    Dumping HTML tree content to a simple buffer    *

 *                  *

 ************************************************************************/

/**

 * htmlBufNodeDumpFormat:

 * @buf:  the xmlBufPtr output

 * @doc:  the document

 * @cur:  the current node

 * @format:  should formatting spaces been added

 *

 * Dump an HTML node, recursive behaviour,children are printed too.

 *

 * Returns the number of byte written or -1 in case of error

 */

static size_t

htmlBufNodeDumpFormat(xmlBufPtr buf, xmlDocPtr doc, xmlNodePtr cur,

             int format) {

    size_t use;

    int ret;

    xmlOutputBufferPtr outbuf;

    if (cur == NULL) {

  return (-1);

    }

    if (buf == NULL) {

  return (-1);

    }

    outbuf = (xmlOutputBufferPtr) xmlMalloc(sizeof(xmlOutputBuffer));

    if (outbuf == NULL) {

        htmlSaveErrMemory("allocating HTML output buffer");

  return (-1);

    }

    memset(outbuf, 0, (size_t) sizeof(xmlOutputBuffer));

    outbuf->buffer = buf;

    outbuf->encoder = NULL;

    outbuf->writecallback = NULL;

    outbuf->closecallback = NULL;

    outbuf->context = NULL;

    outbuf->written = 0;

    use = xmlBufUse(buf);

    htmlNodeDumpFormatOutput(outbuf, doc, cur, NULL, format);

    xmlFree(outbuf);

    ret = xmlBufUse(buf) - use;

    return (ret);

}

/**

 * htmlNodeDump:

 * @buf:  the HTML buffer output

 * @doc:  the document

 * @cur:  the current node

 *

 * Dump an HTML node, recursive behaviour,children are printed too,

 * and formatting returns are added.

 *

 * Returns the number of byte written or -1 in case of error

 */

int

htmlNodeDump(xmlBufferPtr buf, xmlDocPtr doc, xmlNodePtr cur) {

    xmlBufPtr buffer;

    size_t ret;

    if ((buf == NULL) || (cur == NULL))

        return(-1);

    xmlInitParser();

    buffer = xmlBufFromBuffer(buf);

    if (buffer == NULL)

        return(-1);

    ret = htmlBufNodeDumpFormat(buffer, doc, cur, 1);

    xmlBufBackToBuffer(buffer);

    if (ret > INT_MAX)

        return(-1);

    return((int) ret);

}

/**

 * htmlNodeDumpFileFormat:

 * @out:  the FILE pointer

 * @doc:  the document

 * @cur:  the current node

 * @encoding: the document encoding

 * @format:  should formatting spaces been added

 *

 * Dump an HTML node, recursive behaviour,children are printed too.

 *

 * TODO: if encoding == NULL try to save in the doc encoding

 *

 * returns: the number of byte written or -1 in case of failure.

 */

int

htmlNodeDumpFileFormat(FILE *out, xmlDocPtr doc,

                 xmlNodePtr cur, const char *encoding, int format) {

    xmlOutputBufferPtr buf;

    xmlCharEncodingHandlerPtr handler = NULL;

    int ret;

    xmlInitParser();

    if (encoding != NULL) {

  xmlCharEncoding enc;

  enc = xmlParseCharEncoding(encoding);

  if (enc != XML_CHAR_ENCODING_UTF8) {

      handler = xmlFindCharEncodingHandler(encoding);

      if (handler == NULL)

    htmlSaveErr(XML_SAVE_UNKNOWN_ENCODING, NULL, encoding);

  }

    } else {

        /*

         * Fallback to HTML or ASCII when the encoding is unspecified

         */

        if (handler == NULL)

            handler = xmlFindCharEncodingHandler("HTML");

        if (handler == NULL)

            handler = xmlFindCharEncodingHandler("ascii");

    }

    /*

     * save the content to a temp buffer.

     */

    buf = xmlOutputBufferCreateFile(out, handler);

    if (buf == NULL) return(0);

    htmlNodeDumpFormatOutput(buf, doc, cur, NULL, format);

    ret = xmlOutputBufferClose(buf);

    return(ret);

}

/**

 * htmlNodeDumpFile:

 * @out:  the FILE pointer

 * @doc:  the document

 * @cur:  the current node

 *

 * Dump an HTML node, recursive behaviour,children are printed too,

 * and formatting returns are added.

 */

void

htmlNodeDumpFile(FILE *out, xmlDocPtr doc, xmlNodePtr cur) {

    htmlNodeDumpFileFormat(out, doc, cur, NULL, 1);

}

/**

 * htmlDocDumpMemoryFormat:

 * @cur:  the document

 * @mem:  OUT: the memory pointer

 * @size:  OUT: the memory length

 * @format:  should formatting spaces been added

 *

 * Dump an HTML document in memory and return the xmlChar * and it's size.

 * It's up to the caller to free the memory.

 */

void

htmlDocDumpMemoryFormat(xmlDocPtr cur, xmlChar**mem, int *size, int format) {

    xmlOutputBufferPtr buf;

    xmlCharEncodingHandlerPtr handler = NULL;

    const char *encoding;

    xmlInitParser();

    if ((mem == NULL) || (size == NULL))

        return;

    if (cur == NULL) {

  *mem = NULL;

  *size = 0;

  return;

    }

    encoding = (const char *) htmlGetMetaEncoding(cur);

    if (encoding != NULL) {

  xmlCharEncoding enc;

  enc = xmlParseCharEncoding(encoding);

  if (enc != XML_CHAR_ENCODING_UTF8) {

      handler = xmlFindCharEncodingHandler(encoding);

      if (handler == NULL)

                htmlSaveErr(XML_SAVE_UNKNOWN_ENCODING, NULL, encoding);

  }

    } else {

        /*

         * Fallback to HTML or ASCII when the encoding is unspecified

         */

        if (handler == NULL)

            handler = xmlFindCharEncodingHandler("HTML");

        if (handler == NULL)

            handler = xmlFindCharEncodingHandler("ascii");

    }

    buf = xmlAllocOutputBufferInternal(handler);

    if (buf == NULL) {

  *mem = NULL;

  *size = 0;

  return;

    }

    htmlDocContentDumpFormatOutput(buf, cur, NULL, format);

    xmlOutputBufferFlush(buf);

    if (buf->conv != NULL) {

  *size = xmlBufUse(buf->conv);

  *mem = xmlStrndup(xmlBufContent(buf->conv), *size);

    } else {

  *size = xmlBufUse(buf->buffer);

  *mem = xmlStrndup(xmlBufContent(buf->buffer), *size);

    }

    (void)xmlOutputBufferClose(buf);

}

/**

 * htmlDocDumpMemory:

 * @cur:  the document

 * @mem:  OUT: the memory pointer

 * @size:  OUT: the memory length

 *

 * Dump an HTML document in memory and return the xmlChar * and it's size.

 * It's up to the caller to free the memory.

 */

void

htmlDocDumpMemory(xmlDocPtr cur, xmlChar**mem, int *size) {

  htmlDocDumpMemoryFormat(cur, mem, size, 1);

}

/************************************************************************

 *                  *

 *    Dumping HTML tree content to an I/O output buffer *

 *                  *

 ************************************************************************/

void xmlNsListDumpOutput(xmlOutputBufferPtr buf, xmlNsPtr cur);

/**

 * htmlDtdDumpOutput:

 * @buf:  the HTML buffer output

 * @doc:  the document

 * @encoding:  the encoding string

 *

 * TODO: check whether encoding is needed

 *

 * Dump the HTML document DTD, if any.

 */

static void

htmlDtdDumpOutput(xmlOutputBufferPtr buf, xmlDocPtr doc,

            const char *encoding ATTRIBUTE_UNUSED) {

    xmlDtdPtr cur = doc->intSubset;

    if (cur == NULL) {

  htmlSaveErr(XML_SAVE_NO_DOCTYPE, (xmlNodePtr) doc, NULL);

  return;

    }

    xmlOutputBufferWriteString(buf, "<!DOCTYPE ");

    xmlOutputBufferWriteString(buf, (const char *)cur->name);

    if (cur->ExternalID != NULL) {

  xmlOutputBufferWriteString(buf, " PUBLIC ");

  xmlBufWriteQuotedString(buf->buffer, cur->ExternalID);

  if (cur->SystemID != NULL) {

      xmlOutputBufferWriteString(buf, " ");

      xmlBufWriteQuotedString(buf->buffer, cur->SystemID);

  }

    } else if (cur->SystemID != NULL &&

         xmlStrcmp(cur->SystemID, BAD_CAST "about:legacy-compat")) {

  xmlOutputBufferWriteString(buf, " SYSTEM ");

  xmlBufWriteQuotedString(buf->buffer, cur->SystemID);

    }

    xmlOutputBufferWriteString(buf, ">\n");

}

/**

 * htmlAttrDumpOutput:

 * @buf:  the HTML buffer output

 * @doc:  the document

 * @cur:  the attribute pointer

 *

 * Dump an HTML attribute

 */

static void

htmlAttrDumpOutput(xmlOutputBufferPtr buf, xmlDocPtr doc, xmlAttrPtr cur) {

    xmlChar *value;

    /*

     * The html output method should not escape a & character

     * occurring in an attribute value immediately followed by

     * a { character (see Section B.7.1 of the HTML 4.0 Recommendation).

     * This is implemented in xmlEncodeEntitiesReentrant

     */

    if (cur == NULL) {

  return;

    }

    xmlOutputBufferWriteString(buf, " ");

    if ((cur->ns != NULL) && (cur->ns->prefix != NULL)) {

        xmlOutputBufferWriteString(buf, (const char *)cur->ns->prefix);

  xmlOutputBufferWriteString(buf, ":");

    }

    xmlOutputBufferWriteString(buf, (const char *)cur->name);

    if ((cur->children != NULL) && (!htmlIsBooleanAttr(cur->name))) {

  value = xmlNodeListGetString(doc, cur->children, 0);

  if (value) {

      xmlOutputBufferWriteString(buf, "=");

      if ((cur->ns == NULL) && (cur->parent != NULL) &&

    (cur->parent->ns == NULL) &&

    ((!xmlStrcasecmp(cur->name, BAD_CAST "href")) ||

           (!xmlStrcasecmp(cur->name, BAD_CAST "action")) ||

     (!xmlStrcasecmp(cur->name, BAD_CAST "src")) ||

     ((!xmlStrcasecmp(cur->name, BAD_CAST "name")) &&

      (!xmlStrcasecmp(cur->parent->name, BAD_CAST "a"))))) {

    xmlChar *escaped;

    xmlChar *tmp = value;

    while (IS_BLANK_CH(*tmp)) tmp++;

    /*

     * the < and > have already been escaped at the entity level

     * And doing so here breaks server side includes

     */

    escaped = xmlURIEscapeStr(tmp, BAD_CAST"@/:=?;#%&,+<>");

    if (escaped != NULL) {

        xmlBufWriteQuotedString(buf->buffer, escaped);

        xmlFree(escaped);

    } else {

        xmlBufWriteQuotedString(buf->buffer, value);

    }

      } else {

    xmlBufWriteQuotedString(buf->buffer, value);

      }

      xmlFree(value);

  } else  {

      xmlOutputBufferWriteString(buf, "=\"\"");

  }

    }

}

/**

 * htmlNodeDumpFormatOutput:

 * @buf:  the HTML buffer output

 * @doc:  the document

 * @cur:  the current node

 * @encoding:  the encoding string (unused)

 * @format:  should formatting spaces been added

 *

 * Dump an HTML node, recursive behaviour,children are printed too.

 */

void

htmlNodeDumpFormatOutput(xmlOutputBufferPtr buf, xmlDocPtr doc,

                   xmlNodePtr cur, const char *encoding ATTRIBUTE_UNUSED,

                         int format) {

    xmlNodePtr root, parent;

    xmlAttrPtr attr;

    const htmlElemDesc * info;

    xmlInitParser();

    if ((cur == NULL) || (buf == NULL)) {

  return;

    }

    root = cur;

    parent = cur->parent;

    while (1) {

        switch (cur->type) {

        case XML_HTML_DOCUMENT_NODE:

        case XML_DOCUMENT_NODE:

            if (((xmlDocPtr) cur)->intSubset != NULL) {

                htmlDtdDumpOutput(buf, (xmlDocPtr) cur, NULL);

            }

            if (cur->children != NULL) {

                /* Always validate cur->parent when descending. */

                if (cur->parent == parent) {

                    parent = cur;

                    cur = cur->children;

                    continue;

                }

            } else {

                xmlOutputBufferWriteString(buf, "\n");

            }

            break;

        case XML_ELEMENT_NODE:

            /*

             * Some users like lxml are known to pass nodes with a corrupted

             * tree structure. Fall back to a recursive call to handle this

             * case.

             */

            if ((cur->parent != parent) && (cur->children != NULL)) {

                htmlNodeDumpFormatOutput(buf, doc, cur, encoding, format);

                break;

            }

            /*

             * Get specific HTML info for that node.

             */

            if (cur->ns == NULL)

                info = htmlTagLookup(cur->name);

            else

                info = NULL;

            xmlOutputBufferWriteString(buf, "<");

            if ((cur->ns != NULL) && (cur->ns->prefix != NULL)) {

                xmlOutputBufferWriteString(buf, (const char *)cur->ns->prefix);

                xmlOutputBufferWriteString(buf, ":");

            }

            xmlOutputBufferWriteString(buf, (const char *)cur->name);

            if (cur->nsDef)

                xmlNsListDumpOutput(buf, cur->nsDef);

            attr = cur->properties;

            while (attr != NULL) {

                htmlAttrDumpOutput(buf, doc, attr);

                attr = attr->next;

            }

            if ((info != NULL) && (info->empty)) {

                xmlOutputBufferWriteString(buf, ">");

            } else if (cur->children == NULL) {

                if ((info != NULL) && (info->saveEndTag != 0) &&

                    (xmlStrcmp(BAD_CAST info->name, BAD_CAST "html")) &&

                    (xmlStrcmp(BAD_CAST info->name, BAD_CAST "body"))) {

                    xmlOutputBufferWriteString(buf, ">");

                } else {

                    xmlOutputBufferWriteString(buf, "></");

                    if ((cur->ns != NULL) && (cur->ns->prefix != NULL)) {

                        xmlOutputBufferWriteString(buf,

                                (const char *)cur->ns->prefix);

                        xmlOutputBufferWriteString(buf, ":");

                    }

                    xmlOutputBufferWriteString(buf, (const char *)cur->name);

                    xmlOutputBufferWriteString(buf, ">");

                }

            } else {

                xmlOutputBufferWriteString(buf, ">");

                if ((format) && (info != NULL) && (!info->isinline) &&

                    (cur->children->type != HTML_TEXT_NODE) &&

                    (cur->children->type != HTML_ENTITY_REF_NODE) &&

                    (cur->children != cur->last) &&

                    (cur->name != NULL) &&

                    (cur->name[0] != 'p')) /* p, pre, param */

                    xmlOutputBufferWriteString(buf, "\n");

                parent = cur;

                cur = cur->children;

                continue;

            }

            if ((format) && (cur->next != NULL) &&

                (info != NULL) && (!info->isinline)) {

                if ((cur->next->type != HTML_TEXT_NODE) &&

                    (cur->next->type != HTML_ENTITY_REF_NODE) &&

                    (parent != NULL) &&

                    (parent->name != NULL) &&

                    (parent->name[0] != 'p')) /* p, pre, param */

                    xmlOutputBufferWriteString(buf, "\n");

            }

            break;

        case XML_ATTRIBUTE_NODE:

            htmlAttrDumpOutput(buf, doc, (xmlAttrPtr) cur);

            break;

        case HTML_TEXT_NODE:

            if (cur->content == NULL)

                break;

            if (((cur->name == (const xmlChar *)xmlStringText) ||

                 (cur->name != (const xmlChar *)xmlStringTextNoenc)) &&

                ((parent == NULL) ||

                 ((xmlStrcasecmp(parent->name, BAD_CAST "script")) &&

                  (xmlStrcasecmp(parent->name, BAD_CAST "style"))))) {

                xmlChar *buffer;

                buffer = xmlEncodeEntitiesReentrant(doc, cur->content);

                if (buffer != NULL) {

                    xmlOutputBufferWriteString(buf, (const char *)buffer);

                    xmlFree(buffer);

                }

            } else {

                xmlOutputBufferWriteString(buf, (const char *)cur->content);

            }

            break;

        case HTML_COMMENT_NODE:

            if (cur->content != NULL) {

                xmlOutputBufferWriteString(buf, "<!--");

                xmlOutputBufferWriteString(buf, (const char *)cur->content);

                xmlOutputBufferWriteString(buf, "-->");

            }

            break;

        case HTML_PI_NODE:

            if (cur->name != NULL) {

                xmlOutputBufferWriteString(buf, "<?");

                xmlOutputBufferWriteString(buf, (const char *)cur->name);

                if (cur->content != NULL) {

                    xmlOutputBufferWriteString(buf, " ");