-/////////////////////////////////////////////////////////////////////////////
-// Name: xmlpars.cpp
-// Purpose: wxXmlDocument - XML parser
-// Author: Vaclav Slavik
-// Created: 2000/03/05
-// RCS-ID: $Id$
-// Copyright: (c) 2000 Vaclav Slavik
-// Licence: wxWindows licence
-/////////////////////////////////////////////////////////////////////////////
-
-#ifdef __GNUG__
-// nothing - already in xml.cpp
-#endif
-
-// For compilers that support precompilation, includes "wx.h".
-#include "wx/wxprec.h"
-
-#ifdef __BORLANDC__
- #pragma hdrstop
-#endif
-
-#include "wx/wfstream.h"
-#include "wx/intl.h"
-#include "wx/log.h"
-#include "wx/dynlib.h"
-#include "wx/xml/xmlio.h"
-
-#include <libxml/parser.h>
-#include <libxml/SAX.h>
-
-
-// wxWindows SAX handlers for bugs reporting:
-
-static void wxXmlParserError(void *ctx, const char *msg, ...)
-{
- wxString text;
- xmlParserCtxtPtr ctxt = (xmlParserCtxtPtr) ctx;
- if (ctxt->input)
- text.Printf( _("XML parser error at line %d: "), ctxt->input->line );
- va_list args;
- wxString tmp;
- va_start(args, msg);
- tmp.PrintfV( msg, args );
- va_end(args);
- text += tmp;
- wxLogError( text.c_str() );
-}
-
-static void wxXmlParserWarning(void *ctx, const char *msg, ...)
-{
- wxString text;
- xmlParserCtxtPtr ctxt = (xmlParserCtxtPtr) ctx;
- if (ctxt->input)
- text.Printf( _("XML parser warning at line %d: "), ctxt->input->line );
- va_list args;
- wxString tmp;
- va_start(args, msg);
- tmp.PrintfV( msg, args );
- va_end(args);
- text += tmp;
- wxLogWarning( text.c_str() );
-}
-
-static xmlSAXHandler gs_wxXmlSAXHandler;
-
-
-
-// dynamically loaded functions from libxml:
-typedef xmlParserCtxtPtr (*type_xmlCreatePushParserCtxt)
- (xmlSAXHandlerPtr sax, void *, const char *, int, const char *);
-typedef xmlNodePtr (*type_xmlNewText)(const xmlChar *);
-typedef xmlAttrPtr (*type_xmlSetProp)(xmlNodePtr, const xmlChar *, const xmlChar *);
-typedef int (*type_xmlParseChunk)(xmlParserCtxtPtr, const char *, int, int);
-typedef void (*type_xmlFreeParserCtxt)(xmlParserCtxtPtr);
-typedef xmlDocPtr (*type_xmlNewDoc)(const xmlChar *);
-typedef void (*type_xmlFreeDoc)(xmlDocPtr);
-typedef xmlNodePtr (*type_xmlNewDocNode)(xmlDocPtr, xmlNsPtr, const xmlChar *, const xmlChar *);
-typedef void (*type_xmlDocDumpMemory)(xmlDocPtr, xmlChar**, int *);
-typedef xmlNodePtr (*type_xmlAddChild)(xmlNodePtr, xmlNodePtr);
-typedef xmlNodePtr (*type_xmlNewChild)(xmlNodePtr, xmlNsPtr, const xmlChar *, const xmlChar *);
-typedef xmlChar * (*type_xmlNodeListGetString)(xmlDocPtr, xmlNodePtr, int);
-typedef xmlNodePtr (*type_xmlDocGetRootElement)(xmlDocPtr);
-typedef xmlNodePtr (*type_xmlDocSetRootElement)(xmlDocPtr doc, xmlNodePtr root);
-typedef void (*(*type_xmlFree))(void *);
-typedef int (*type_xmlKeepBlanksDefault)(int);
-typedef void (*type_xmlInitParser)(void);
-typedef void (*type_xmlCleanupParser)(void);
-typedef xmlSAXHandler *type_xmlDefaultSAXHandler;
-
-static struct
-{
- wxDllType Handle;
-
- type_xmlCreatePushParserCtxt xmlCreatePushParserCtxt;
- type_xmlNewText xmlNewText;
- type_xmlSetProp xmlSetProp;
- type_xmlParseChunk xmlParseChunk;
- type_xmlFreeParserCtxt xmlFreeParserCtxt;
- type_xmlNewDoc xmlNewDoc;
- type_xmlFreeDoc xmlFreeDoc;
- type_xmlNewDocNode xmlNewDocNode;
- type_xmlDocDumpMemory xmlDocDumpMemory;
- type_xmlAddChild xmlAddChild;
- type_xmlNewChild xmlNewChild;
- type_xmlNodeListGetString xmlNodeListGetString;
- type_xmlDocGetRootElement xmlDocGetRootElement;
- type_xmlDocSetRootElement xmlDocSetRootElement;
- type_xmlFree xmlFree;
- type_xmlKeepBlanksDefault xmlKeepBlanksDefault;
- type_xmlInitParser xmlInitParser;
- type_xmlCleanupParser xmlCleanupParser;
- type_xmlDefaultSAXHandler xmlDefaultSAXHandler;
-} gs_libxmlDLL;
-
-static bool gs_libxmlLoaded = FALSE;
-static bool gs_libxmlLoadFailed = FALSE;
-
-
-
-static void ReleaseLibxml()
-{
- if (gs_libxmlLoaded)
- {
- // Check for CleanupParser ..may have failed before initialised
- // during LOAD_SYMBOL in LoadLibxml()
- if (gs_libxmlDLL.xmlCleanupParser)
- gs_libxmlDLL.xmlCleanupParser();
- wxDllLoader::UnloadLibrary(gs_libxmlDLL.Handle);
- }
- gs_libxmlLoaded = FALSE;
- gs_libxmlLoadFailed = FALSE;
-}
-
-
-static bool LoadLibxml()
-{
- if (gs_libxmlLoaded) return TRUE;
- if (gs_libxmlLoadFailed) return FALSE;
- gs_libxmlLoadFailed = TRUE;
-
- {
- wxLogNull lg;
-#ifdef __UNIX__
- gs_libxmlDLL.Handle =
- wxDllLoader::LoadLibrary(wxT("wxlibxml.so.2"), &gs_libxmlLoaded);
- if (!gs_libxmlLoaded) gs_libxmlDLL.Handle =
- wxDllLoader::LoadLibrary(wxT("libxml.so.2"), &gs_libxmlLoaded);
-#endif
-#ifdef __WXMSW__
- gs_libxmlDLL.Handle =
- wxDllLoader::LoadLibrary(wxT("wxlibxml2.dll"), &gs_libxmlLoaded);
- if (!gs_libxmlLoaded) gs_libxmlDLL.Handle =
- wxDllLoader::LoadLibrary(wxT("libxml2.dll"), &gs_libxmlLoaded);
-#endif
- }
-
- if (!gs_libxmlLoaded)
- {
- wxLogError(_("Failed to load libxml shared library."));
- return FALSE;
- }
-
-#define LOAD_SYMBOL(sym) \
- gs_libxmlDLL.sym = \
- (type_##sym)wxDllLoader::GetSymbol(gs_libxmlDLL.Handle, wxT(#sym)); \
- if (!gs_libxmlDLL.sym) \
- { \
- ReleaseLibxml(); \
- wxLogError(_("Failed to load libxml shared library.")); \
- return FALSE; \
- }
-
- LOAD_SYMBOL(xmlCreatePushParserCtxt)
- LOAD_SYMBOL(xmlNewText)
- LOAD_SYMBOL(xmlSetProp)
- LOAD_SYMBOL(xmlParseChunk)
- LOAD_SYMBOL(xmlFreeParserCtxt)
- LOAD_SYMBOL(xmlNewDoc)
- LOAD_SYMBOL(xmlFreeDoc)
- LOAD_SYMBOL(xmlNewDocNode)
- LOAD_SYMBOL(xmlDocDumpMemory)
- LOAD_SYMBOL(xmlAddChild)
- LOAD_SYMBOL(xmlNewChild)
- LOAD_SYMBOL(xmlNodeListGetString)
- LOAD_SYMBOL(xmlDocGetRootElement)
- LOAD_SYMBOL(xmlDocSetRootElement)
- LOAD_SYMBOL(xmlFree)
- LOAD_SYMBOL(xmlKeepBlanksDefault)
- LOAD_SYMBOL(xmlInitParser)
- LOAD_SYMBOL(xmlCleanupParser)
- LOAD_SYMBOL(xmlDefaultSAXHandler)
-
-#undef LOAD_SYMBOL
-
- gs_libxmlLoadFailed = FALSE;
-
- gs_libxmlDLL.xmlInitParser();
- memcpy(&gs_wxXmlSAXHandler, gs_libxmlDLL.xmlDefaultSAXHandler,
- sizeof(xmlSAXHandler));
- gs_wxXmlSAXHandler.error = wxXmlParserError;
- gs_wxXmlSAXHandler.fatalError = wxXmlParserError;
- gs_wxXmlSAXHandler.warning = wxXmlParserWarning;
-
- return TRUE;
-}
-
-
-
-
-bool wxXmlIOHandlerLibxml::CanLoad(wxInputStream& stream)
-{
- if (!LoadLibxml()) return FALSE;
- char cheader[7];
- cheader[6] = 0;
- stream.Read(cheader, 6);
- stream.SeekI(-6, wxFromCurrent);
- return strcmp(cheader, "<?xml ") == 0;
-}
-
-
-
-bool wxXmlIOHandlerLibxml::CanSave()
-{
- return LoadLibxml();
-}
-
-
-
-static wxXmlProperty *CreateWXProperty(xmlDocPtr doc, xmlAttrPtr attr)
-{
- if (attr == NULL) return NULL;
-
- unsigned char *val =
- gs_libxmlDLL.xmlNodeListGetString(doc, attr->children, 1);
- wxXmlProperty *prop =
- new wxXmlProperty(attr->name, val, CreateWXProperty(doc, attr->next));
- (*gs_libxmlDLL.xmlFree)(val);
- return prop;
-}
-
-
-
-static wxXmlNode *CreateWXNode(xmlDocPtr doc, wxXmlNode *parent, xmlNodePtr node)
-{
- if (node == NULL) return NULL;
-
- wxXmlNode *nd = new wxXmlNode(parent, (wxXmlNodeType)node->type,
- node->name, node->content,
- CreateWXProperty(doc, node->properties),
- CreateWXNode(doc, parent, node->next));
- CreateWXNode(doc, nd, node->children);
- return nd;
-}
-
-
-
-bool wxXmlIOHandlerLibxml::Load(wxInputStream& stream, wxXmlDocument& doc)
-{
- if (!LoadLibxml()) return FALSE;
-
- xmlDocPtr dc;
- xmlParserCtxtPtr ctxt;
-
- char buffer[1024];
- int res;
-
- res = stream.Read(buffer, 4).LastRead();
- if (res > 0)
- {
- bool okay = TRUE;
- gs_libxmlDLL.xmlKeepBlanksDefault(0);
- ctxt = gs_libxmlDLL.xmlCreatePushParserCtxt(&gs_wxXmlSAXHandler,
- NULL, buffer, res, ""/*docname*/);
- while ((res = stream.Read(buffer, 1024).LastRead()) > 0)
- if (gs_libxmlDLL.xmlParseChunk(ctxt, buffer, res, 0) != 0)
- okay = FALSE;
- if (gs_libxmlDLL.xmlParseChunk(ctxt, buffer, 0, 1) != 0) okay = FALSE;
- dc = ctxt->myDoc;
- gs_libxmlDLL.xmlFreeParserCtxt(ctxt);
-
- doc.SetVersion(dc->version);
- doc.SetEncoding(dc->encoding);
- doc.SetRoot(CreateWXNode(dc, NULL, gs_libxmlDLL.xmlDocGetRootElement(dc)));
-
- gs_libxmlDLL.xmlFreeDoc(dc);
-
- return okay;
- }
- else return FALSE;
-}
-
-
-
-static void CreateLibxmlNode(xmlNodePtr node, wxXmlNode *wxnode)
-{
- node->type = (xmlElementType)wxnode->GetType();
-
- wxXmlProperty *prop = wxnode->GetProperties();
- while (prop)
- {
- gs_libxmlDLL.xmlSetProp(node, (xmlChar*)prop->GetName().mb_str(),
- (xmlChar*)prop->GetValue().mb_str());
- prop = prop->GetNext();
- }
-
- wxXmlNode *child = wxnode->GetChildren();
- xmlNodePtr n;
- xmlChar *content, *name;
-
- while (child)
- {
- name = (xmlChar*)child->GetName().mb_str();
- if (!child->GetContent()) content = NULL;
- else content = (xmlChar*)child->GetContent().mb_str();
- if (child->GetType() == wxXML_TEXT_NODE)
- gs_libxmlDLL.xmlAddChild(node, n = gs_libxmlDLL.xmlNewText(content));
- else
- n = gs_libxmlDLL.xmlNewChild(node, NULL, name, content);
- CreateLibxmlNode(n, child);
- child = child->GetNext();
- }
-}
-
-
-
-bool wxXmlIOHandlerLibxml::Save(wxOutputStream& stream, const wxXmlDocument& doc)
-{
- if (!LoadLibxml()) return FALSE;
-
- xmlDocPtr dc;
-
- wxASSERT_MSG(doc.GetRoot() != NULL, _("Trying to save empty document!"));
-
- gs_libxmlDLL.xmlKeepBlanksDefault(0);
- dc = gs_libxmlDLL.xmlNewDoc((xmlChar*)doc.GetVersion().mb_str());
-
- gs_libxmlDLL.xmlDocSetRootElement(dc,
- gs_libxmlDLL.xmlNewDocNode(dc, NULL,
- (xmlChar*)doc.GetRoot()->GetName().mb_str(), NULL));
- CreateLibxmlNode(gs_libxmlDLL.xmlDocGetRootElement(dc), doc.GetRoot());
-
- xmlChar *buffer;
- int size;
-
- gs_libxmlDLL.xmlDocDumpMemory(dc, &buffer, &size);
- gs_libxmlDLL.xmlFreeDoc(dc);
- stream.Write(buffer, size);
- (*gs_libxmlDLL.xmlFree)(buffer);
- return stream.LastWrite() == (unsigned)size;
-}
-
-
-
-
-#include "wx/module.h"
-
-class wxXmlLibxmlModule: public wxModule
-{
- DECLARE_DYNAMIC_CLASS(wxXmlLibxmlModule)
- public:
- wxXmlLibxmlModule() {}
- bool OnInit() { return TRUE; }
- void OnExit() { ReleaseLibxml(); }
-};
-
-IMPLEMENT_DYNAMIC_CLASS(wxXmlLibxmlModule, wxModule)
projects / wxWidgets.git / commitdiff
