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kc3-lang/libxml2/HTMLtree.c
Daniel Veillard
- HTMLtree.c
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/* * HTMLtree.c : implemetation of access function for an HTML tree. * * See Copyright for the status of this software. * * Daniel.Veillard@w3.org */ #include "config.h" #include <stdio.h> #include <ctype.h> #include <stdlib.h> #include <string.h> /* for memset() only ! */ #include "xmlmemory.h" #include "HTMLparser.h" #include "HTMLtree.h" #include "entities.h" #include "valid.h" /** * htmlDtdDump: * @buf: the HTML buffer output * @doc: the document * * Dump the HTML document DTD, if any. */ static void htmlDtdDump(xmlBufferPtr buf, xmlDocPtr doc) { xmlDtdPtr cur = doc->intSubset; if (cur == NULL) { fprintf(stderr, "htmlDtdDump : no internal subset\n"); return; } xmlBufferWriteChar(buf, "<!DOCTYPE "); xmlBufferWriteCHAR(buf, cur->name); if (cur->ExternalID != NULL) { xmlBufferWriteChar(buf, " PUBLIC "); xmlBufferWriteQuotedString(buf, cur->ExternalID); if (cur->SystemID != NULL) { xmlBufferWriteChar(buf, " "); xmlBufferWriteQuotedString(buf, cur->SystemID); } } else if (cur->SystemID != NULL) { xmlBufferWriteChar(buf, " SYSTEM "); xmlBufferWriteQuotedString(buf, cur->SystemID); } xmlBufferWriteChar(buf, ">\n"); } /** * htmlAttrDump: * @buf: the HTML buffer output * @doc: the document * @cur: the attribute pointer * * Dump an HTML attribute */ static void htmlAttrDump(xmlBufferPtr buf, xmlDocPtr doc, xmlAttrPtr cur) { CHAR *value; if (cur == NULL) { fprintf(stderr, "htmlAttrDump : property == NULL\n"); return; } xmlBufferWriteChar(buf, " "); xmlBufferWriteCHAR(buf, cur->name); value = xmlNodeListGetString(doc, cur->val, 0); if (value) { xmlBufferWriteChar(buf, "="); xmlBufferWriteQuotedString(buf, value); xmlFree(value); } else { xmlBufferWriteChar(buf, "=\"\""); } } /** * htmlAttrListDump: * @buf: the HTML buffer output * @doc: the document * @cur: the first attribute pointer * * Dump a list of HTML attributes */ static void htmlAttrListDump(xmlBufferPtr buf, xmlDocPtr doc, xmlAttrPtr cur) { if (cur == NULL) { fprintf(stderr, "htmlAttrListDump : property == NULL\n"); return; } while (cur != NULL) { htmlAttrDump(buf, doc, cur); cur = cur->next; } } static void htmlNodeDump(xmlBufferPtr buf, xmlDocPtr doc, xmlNodePtr cur); /** * htmlNodeListDump: * @buf: the HTML buffer output * @doc: the document * @cur: the first node * * Dump an HTML node list, recursive behaviour,children are printed too. */ static void htmlNodeListDump(xmlBufferPtr buf, xmlDocPtr doc, xmlNodePtr cur) { if (cur == NULL) { fprintf(stderr, "htmlNodeListDump : node == NULL\n"); return; } while (cur != NULL) { htmlNodeDump(buf, doc, cur); cur = cur->next; } } /** * htmlNodeDump: * @buf: the HTML buffer output * @doc: the document * @cur: the current node * * Dump an HTML node, recursive behaviour,children are printed too. */ static void htmlNodeDump(xmlBufferPtr buf, xmlDocPtr doc, xmlNodePtr cur) { htmlElemDescPtr info; if (cur == NULL) { fprintf(stderr, "htmlNodeDump : node == NULL\n"); return; } /* * Special cases. */ if (cur->type == HTML_TEXT_NODE) { if (cur->content != NULL) { CHAR *buffer; /* uses the HTML encoding routine !!!!!!!!!! */ buffer = xmlEncodeEntitiesReentrant(doc, cur->content); if (buffer != NULL) { xmlBufferWriteCHAR(buf, buffer); xmlFree(buffer); } } return; } if (cur->type == HTML_COMMENT_NODE) { if (cur->content != NULL) { xmlBufferWriteChar(buf, "<!--"); xmlBufferWriteCHAR(buf, cur->content); xmlBufferWriteChar(buf, "-->"); } return; } if (cur->type == HTML_ENTITY_REF_NODE) { xmlBufferWriteChar(buf, "&"); xmlBufferWriteCHAR(buf, cur->name); xmlBufferWriteChar(buf, ";"); return; } /* * Get specific HTmL info for taht node. */ info = htmlTagLookup(cur->name); xmlBufferWriteChar(buf, "<"); xmlBufferWriteCHAR(buf, cur->name); if (cur->properties != NULL) htmlAttrListDump(buf, doc, cur->properties); if (info->empty) { xmlBufferWriteChar(buf, ">"); if (cur->next != NULL) { if ((cur->next->type != HTML_TEXT_NODE) && (cur->next->type != HTML_ENTITY_REF_NODE)) xmlBufferWriteChar(buf, "\n"); } return; } if ((cur->content == NULL) && (cur->childs == NULL)) { if (info->endTag != 0) xmlBufferWriteChar(buf, ">"); else { xmlBufferWriteChar(buf, "></"); xmlBufferWriteCHAR(buf, cur->name); xmlBufferWriteChar(buf, ">"); } if (cur->next != NULL) { if ((cur->next->type != HTML_TEXT_NODE) && (cur->next->type != HTML_ENTITY_REF_NODE)) xmlBufferWriteChar(buf, "\n"); } return; } xmlBufferWriteChar(buf, ">"); if (cur->content != NULL) { CHAR *buffer; buffer = xmlEncodeEntitiesReentrant(doc, cur->content); if (buffer != NULL) { xmlBufferWriteCHAR(buf, buffer); xmlFree(buffer); } } if (cur->childs != NULL) { if ((cur->childs->type != HTML_TEXT_NODE) && (cur->childs->type != HTML_ENTITY_REF_NODE)) xmlBufferWriteChar(buf, "\n"); htmlNodeListDump(buf, doc, cur->childs); if ((cur->last->type != HTML_TEXT_NODE) && (cur->last->type != HTML_ENTITY_REF_NODE)) xmlBufferWriteChar(buf, "\n"); } xmlBufferWriteChar(buf, "</"); xmlBufferWriteCHAR(buf, cur->name); xmlBufferWriteChar(buf, ">"); if (cur->next != NULL) { if ((cur->next->type != HTML_TEXT_NODE) && (cur->next->type != HTML_ENTITY_REF_NODE)) xmlBufferWriteChar(buf, "\n"); } } /** * htmlDocContentDump: * @buf: the HTML buffer output * @cur: the document * * Dump an HTML document. */ static void htmlDocContentDump(xmlBufferPtr buf, xmlDocPtr cur) { if (cur->intSubset != NULL) htmlDtdDump(buf, cur); if (cur->root != NULL) { htmlNodeDump(buf, cur, cur->root); } xmlBufferWriteChar(buf, "\n"); } /** * htmlDocDumpMemory: * @cur: the document * @mem: OUT: the memory pointer * @size: OUT: the memory lenght * * Dump an HTML document in memory and return the CHAR * and it's size. * It's up to the caller to free the memory. */ void htmlDocDumpMemory(xmlDocPtr cur, CHAR**mem, int *size) { xmlBufferPtr buf; if (cur == NULL) { #ifdef DEBUG_TREE fprintf(stderr, "xmlDocDumpMemory : document == NULL\n"); #endif *mem = NULL; *size = 0; return; } buf = xmlBufferCreate(); if (buf == NULL) { *mem = NULL; *size = 0; return; } htmlDocContentDump(buf, cur); *mem = buf->content; *size = buf->use; memset(buf, -1, sizeof(xmlBuffer)); xmlFree(buf); } /** * htmlDocDump: * @f: the FILE* * @cur: the document * * Dump an HTML document to an open FILE. */ void htmlDocDump(FILE *f, xmlDocPtr cur) { xmlBufferPtr buf; if (cur == NULL) { #ifdef DEBUG_TREE fprintf(stderr, "xmlDocDump : document == NULL\n"); #endif return; } buf = xmlBufferCreate(); if (buf == NULL) return; htmlDocContentDump(buf, cur); xmlBufferDump(f, buf); xmlBufferFree(buf); } /** * htmlSaveFile: * @filename: the filename * @cur: the document * * Dump an HTML document to a file. * * returns: the number of byte written or -1 in case of failure. */ int htmlSaveFile(const char *filename, xmlDocPtr cur) { xmlBufferPtr buf; FILE *output = NULL; int ret; /* * save the content to a temp buffer. */ buf = xmlBufferCreate(); if (buf == NULL) return(0); htmlDocContentDump(buf, cur); output = fopen(filename, "w"); if (output == NULL) return(-1); ret = xmlBufferDump(output, buf); fclose(output); xmlBufferFree(buf); return(ret * sizeof(CHAR)); }