-/////////////////////////////////////////////////////////////////////////////
-// Name: xmlexpat.cpp
-// Purpose: wxXmlDocument - XML reader via Expat
-// Author: Vaclav Slavik
-// Created: 2001/04/30
-// RCS-ID: $Id$
-// Copyright: (c) 2001 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/strconv.h"
-#include "wx/xrc/xmlio.h"
-
-#include "xmlparse.h"
-
-/*
-
- FIXME:
- - process all elements, including CDATA
-
- */
-
-
-// converts Expat-produced string in UTF-8 into wxString.
-inline static wxString CharToString(wxMBConv *conv,
- const char *s, size_t len = wxSTRING_MAXLEN)
-{
-#if wxUSE_UNICODE
- (void)conv;
- return wxString(s, wxConvUTF8, len);
-#else
- if ( conv )
- {
- size_t nLen = (len != wxSTRING_MAXLEN) ? len :
- nLen = wxConvUTF8.MB2WC((wchar_t*) NULL, s, 0);
-
- wchar_t *buf = new wchar_t[nLen+1];
- wxConvUTF8.MB2WC(buf, s, nLen);
- buf[nLen] = 0;
- return wxString(buf, *conv, len);
- delete[] buf;
- }
- else
- return wxString(s, len);
-#endif
-}
-
-bool wxXmlIOHandlerExpat::CanLoad(wxInputStream& stream)
-{
- char cheader[7];
- cheader[6] = 0;
- stream.Read(cheader, 6);
- stream.SeekI(-6, wxFromCurrent);
- return (strcmp(cheader, "<?xml ") == 0);
-}
-
-
-struct wxXmlParsingContext
-{
- wxMBConv *conv;
-
- wxXmlNode *root;
- wxXmlNode *node;
- wxXmlNode *lastAsText;
- wxString encoding;
- wxString version;
-};
-
-static void StartElementHnd(void *userData, const char *name, const char **atts)
-{
- wxXmlParsingContext *ctx = (wxXmlParsingContext*)userData;
- wxXmlNode *node = new wxXmlNode(wxXML_ELEMENT_NODE, CharToString(ctx->conv, name));
- const char **a = atts;
- while (*a)
- {
- node->AddProperty(CharToString(ctx->conv, a[0]), CharToString(ctx->conv, a[1]));
- a += 2;
- }
- if (ctx->root == NULL)
- ctx->root = node;
- else
- ctx->node->AddChild(node);
- ctx->node = node;
- ctx->lastAsText = NULL;
-}
-
-static void EndElementHnd(void *userData, const char* WXUNUSED(name))
-{
- wxXmlParsingContext *ctx = (wxXmlParsingContext*)userData;
-
- ctx->node = ctx->node->GetParent();
- ctx->lastAsText = NULL;
-}
-
-static void TextHnd(void *userData, const char *s, int len)
-{
- wxXmlParsingContext *ctx = (wxXmlParsingContext*)userData;
- char *buf = new char[len + 1];
-
- buf[len] = '\0';
- memcpy(buf, s, (size_t)len);
-
- if (ctx->lastAsText)
- {
- ctx->lastAsText->SetContent(ctx->lastAsText->GetContent() +
- CharToString(ctx->conv, buf));
- }
- else
- {
- bool whiteOnly = TRUE;
- for (char *c = buf; *c != '\0'; c++)
- if (*c != ' ' && *c != '\t' && *c != '\n' && *c != '\r')
- {
- whiteOnly = FALSE;
- break;
- }
- if (!whiteOnly)
- {
- ctx->lastAsText = new wxXmlNode(wxXML_TEXT_NODE, wxT("text"),
- CharToString(ctx->conv, buf));
- ctx->node->AddChild(ctx->lastAsText);
- }
- }
-
- delete[] buf;
-}
-
-static void CommentHnd(void *userData, const char *data)
-{
- wxXmlParsingContext *ctx = (wxXmlParsingContext*)userData;
-
- if (ctx->node)
- {
- // VS: ctx->node == NULL happens if there is a comment before
- // the root element (e.g. wxDesigner's output). We ignore such
- // comments, no big deal...
- ctx->node->AddChild(new wxXmlNode(wxXML_COMMENT_NODE,
- wxT("comment"), CharToString(ctx->conv, data)));
- }
- ctx->lastAsText = NULL;
-}
-
-static void DefaultHnd(void *userData, const char *s, int len)
-{
- // XML header:
- if (len > 6 && memcmp(s, "<?xml ", 6) == 0)
- {
- wxXmlParsingContext *ctx = (wxXmlParsingContext*)userData;
-
- wxString buf = CharToString(ctx->conv, s, (size_t)len);
- int pos;
- pos = buf.Find(wxT("encoding="));
- if (pos != wxNOT_FOUND)
- ctx->encoding = buf.Mid(pos + 10).BeforeFirst(buf[(size_t)pos+9]);
- pos = buf.Find(wxT("version="));
- if (pos != wxNOT_FOUND)
- ctx->version = buf.Mid(pos + 9).BeforeFirst(buf[(size_t)pos+8]);
- }
-}
-
-static int UnknownEncodingHnd(void * WXUNUSED(encodingHandlerData),
- const XML_Char *name, XML_Encoding *info)
-{
- // We must build conversion table for expat. The easiest way to do so
- // is to let wxCSConv convert as string containing all characters to
- // wide character representation:
- wxCSConv conv(name);
- char mbBuf[255];
- wchar_t wcBuf[255];
- size_t i;
-
- for (i = 0; i < 255; i++)
- mbBuf[i] = i+1;
- mbBuf[255] = 0;
- conv.MB2WC(wcBuf, mbBuf, 255);
- wcBuf[255] = 0;
-
- info->map[0] = 0;
- for (i = 0; i < 255; i++)
- info->map[i+1] = (int)wcBuf[i];
-
- info->data = NULL;
- info->convert = NULL;
- info->release = NULL;
-
- return 1;
-}
-
-bool wxXmlIOHandlerExpat::Load(wxInputStream& stream, wxXmlDocument& doc,
- const wxString& encoding)
-{
- const size_t BUFSIZE = 1024;
- char buf[BUFSIZE];
- wxXmlParsingContext ctx;
- bool done;
- XML_Parser parser = XML_ParserCreate(NULL);
-
- ctx.root = ctx.node = NULL;
- ctx.encoding = wxT("UTF-8"); // default in absence of encoding=""
- ctx.conv = NULL;
-#if !wxUSE_UNICODE
- if ( encoding != wxT("UTF-8") && encoding != wxT("utf-8") )
- ctx.conv = new wxCSConv(encoding);
-#endif
-
- XML_SetUserData(parser, (void*)&ctx);
- XML_SetElementHandler(parser, StartElementHnd, EndElementHnd);
- XML_SetCharacterDataHandler(parser, TextHnd);
- XML_SetCommentHandler(parser, CommentHnd);
- XML_SetDefaultHandler(parser, DefaultHnd);
- XML_SetUnknownEncodingHandler(parser, UnknownEncodingHnd, NULL);
-
- do
- {
- size_t len = stream.Read(buf, BUFSIZE).LastRead();
- done = (len < BUFSIZE);
- if (!XML_Parse(parser, buf, len, done))
- {
- wxLogError(_("XML parsing error: '%s' at line %d"),
- XML_ErrorString(XML_GetErrorCode(parser)),
- XML_GetCurrentLineNumber(parser));
- return FALSE;
- }
- } while (!done);
-
- doc.SetVersion(ctx.version);
- doc.SetFileEncoding(ctx.encoding);
- doc.SetRoot(ctx.root);
-
- XML_ParserFree(parser);
-#if !wxUSE_UNICODE
- if ( ctx.conv )
- delete ctx.conv;
-#endif
-
- return TRUE;
-}
projects / wxWidgets.git / commitdiff
