Sweden-Number/dlls/msxml3/queryresult.c

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/*
* XPath query result node list implementation (TODO: XSLPattern support)
*
* Copyright 2005 Mike McCormack
* Copyright 2007 Mikolaj Zalewski
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#define COBJMACROS
#include "config.h"
#include <stdarg.h>
#include "windef.h"
#include "winbase.h"
#include "winuser.h"
#include "ole2.h"
#include "msxml2.h"
#include "msxml_private.h"
#include "wine/debug.h"
/* This file implements the object returned by a XPath query. Note that this is
* not the IXMLDOMNodeList returned by childNodes - it's implemented in nodelist.c.
* They are different because the list returned by XPath queries:
* - is static - gives the results for the XML tree as it existed during the
* execution of the query
* - supports IXMLDOMSelection (TODO)
*
* TODO: XSLPattern support
*/
WINE_DEFAULT_DEBUG_CHANNEL(msxml);
#ifdef HAVE_LIBXML2
#include <libxml/xpath.h>
static const struct IXMLDOMNodeListVtbl queryresult_vtbl;
typedef struct _queryresult
{
const struct IXMLDOMNodeListVtbl *lpVtbl;
LONG ref;
xmlNodePtr node;
xmlXPathObjectPtr result;
int resultPos;
} queryresult;
static inline queryresult *impl_from_IXMLDOMNodeList( IXMLDOMNodeList *iface )
{
return (queryresult *)((char*)iface - FIELD_OFFSET(queryresult, lpVtbl));
}
HRESULT queryresult_create(xmlNodePtr node, LPWSTR szQuery, IXMLDOMNodeList **out)
{
queryresult *This = CoTaskMemAlloc(sizeof(queryresult));
xmlXPathContextPtr ctxt = xmlXPathNewContext(node->doc);
xmlChar *str = xmlChar_from_wchar(szQuery);
HRESULT hr;
TRACE("(%p, %s, %p)\n", node, wine_dbgstr_w(szQuery), out);
*out = NULL;
if (This == NULL || ctxt == NULL || str == NULL)
{
hr = E_OUTOFMEMORY;
goto cleanup;
}
This->lpVtbl = &queryresult_vtbl;
This->ref = 1;
This->resultPos = 0;
This->node = node;
xmldoc_add_ref(This->node->doc);
ctxt->node = node;
This->result = xmlXPathEval(str, ctxt);
if (!This->result || This->result->type != XPATH_NODESET)
{
hr = E_FAIL;
goto cleanup;
}
*out = (IXMLDOMNodeList *)This;
hr = S_OK;
TRACE("found %d matches\n", xmlXPathNodeSetGetLength(This->result->nodesetval));
cleanup:
if (This != NULL && FAILED(hr))
IXMLDOMNodeList_Release( (IXMLDOMNodeList*) &This->lpVtbl );
if (ctxt != NULL)
xmlXPathFreeContext(ctxt);
HeapFree(GetProcessHeap(), 0, str);
return hr;
}
static HRESULT WINAPI queryresult_QueryInterface(
IXMLDOMNodeList *iface,
REFIID riid,
void** ppvObject )
{
TRACE("%p %s %p\n", iface, debugstr_guid(riid), ppvObject);
if(!ppvObject)
return E_INVALIDARG;
if ( IsEqualGUID( riid, &IID_IUnknown ) ||
IsEqualGUID( riid, &IID_IDispatch ) ||
IsEqualGUID( riid, &IID_IXMLDOMNodeList ) )
{
*ppvObject = iface;
}
else
{
FIXME("interface %s not implemented\n", debugstr_guid(riid));
*ppvObject = NULL;
return E_NOINTERFACE;
}
IXMLDOMNodeList_AddRef( iface );
return S_OK;
}
static ULONG WINAPI queryresult_AddRef(
IXMLDOMNodeList *iface )
{
queryresult *This = impl_from_IXMLDOMNodeList( iface );
return InterlockedIncrement( &This->ref );
}
static ULONG WINAPI queryresult_Release(
IXMLDOMNodeList *iface )
{
queryresult *This = impl_from_IXMLDOMNodeList( iface );
ULONG ref;
ref = InterlockedDecrement(&This->ref);
if ( ref == 0 )
{
xmlXPathFreeObject(This->result);
xmldoc_release(This->node->doc);
CoTaskMemFree(This);
}
return ref;
}
static HRESULT WINAPI queryresult_GetTypeInfoCount(
IXMLDOMNodeList *iface,
UINT* pctinfo )
{
queryresult *This = impl_from_IXMLDOMNodeList( iface );
TRACE("(%p)->(%p)\n", This, pctinfo);
*pctinfo = 1;
return S_OK;
}
static HRESULT WINAPI queryresult_GetTypeInfo(
IXMLDOMNodeList *iface,
UINT iTInfo,
LCID lcid,
ITypeInfo** ppTInfo )
{
queryresult *This = impl_from_IXMLDOMNodeList( iface );
HRESULT hr;
TRACE("(%p)->(%u %u %p)\n", This, iTInfo, lcid, ppTInfo);
hr = get_typeinfo(IXMLDOMNodeList_tid, ppTInfo);
return hr;
}
static HRESULT WINAPI queryresult_GetIDsOfNames(
IXMLDOMNodeList *iface,
REFIID riid,
LPOLESTR* rgszNames,
UINT cNames,
LCID lcid,
DISPID* rgDispId )
{
queryresult *This = impl_from_IXMLDOMNodeList( iface );
ITypeInfo *typeinfo;
HRESULT hr;
TRACE("(%p)->(%s %p %u %u %p)\n", This, debugstr_guid(riid), rgszNames, cNames,
lcid, rgDispId);
if(!rgszNames || cNames == 0 || !rgDispId)
return E_INVALIDARG;
hr = get_typeinfo(IXMLDOMNodeList_tid, &typeinfo);
if(SUCCEEDED(hr))
{
hr = ITypeInfo_GetIDsOfNames(typeinfo, rgszNames, cNames, rgDispId);
ITypeInfo_Release(typeinfo);
}
return hr;
}
static HRESULT WINAPI queryresult_Invoke(
IXMLDOMNodeList *iface,
DISPID dispIdMember,
REFIID riid,
LCID lcid,
WORD wFlags,
DISPPARAMS* pDispParams,
VARIANT* pVarResult,
EXCEPINFO* pExcepInfo,
UINT* puArgErr )
{
queryresult *This = impl_from_IXMLDOMNodeList( iface );
ITypeInfo *typeinfo;
HRESULT hr;
TRACE("(%p)->(%d %s %d %d %p %p %p %p)\n", This, dispIdMember, debugstr_guid(riid),
lcid, wFlags, pDispParams, pVarResult, pExcepInfo, puArgErr);
hr = get_typeinfo(IXMLDOMNodeList_tid, &typeinfo);
if(SUCCEEDED(hr))
{
hr = ITypeInfo_Invoke(typeinfo, &(This->lpVtbl), dispIdMember, wFlags, pDispParams,
pVarResult, pExcepInfo, puArgErr);
ITypeInfo_Release(typeinfo);
}
return hr;
}
static HRESULT WINAPI queryresult_get_item(
IXMLDOMNodeList* iface,
long index,
IXMLDOMNode** listItem)
{
queryresult *This = impl_from_IXMLDOMNodeList( iface );
TRACE("%p %ld\n", This, index);
if(!listItem)
return E_INVALIDARG;
*listItem = NULL;
if (index < 0 || index >= xmlXPathNodeSetGetLength(This->result->nodesetval))
return S_FALSE;
*listItem = create_node(This->result->nodesetval->nodeTab[index]);
This->resultPos = index + 1;
return S_OK;
}
static HRESULT WINAPI queryresult_get_length(
IXMLDOMNodeList* iface,
long* listLength)
{
queryresult *This = impl_from_IXMLDOMNodeList( iface );
TRACE("%p\n", This);
if(!listLength)
return E_INVALIDARG;
*listLength = xmlXPathNodeSetGetLength(This->result->nodesetval);
return S_OK;
}
static HRESULT WINAPI queryresult_nextNode(
IXMLDOMNodeList* iface,
IXMLDOMNode** nextItem)
{
queryresult *This = impl_from_IXMLDOMNodeList( iface );
TRACE("%p %p\n", This, nextItem );
if(!nextItem)
return E_INVALIDARG;
*nextItem = NULL;
if (This->resultPos >= xmlXPathNodeSetGetLength(This->result->nodesetval))
return S_FALSE;
*nextItem = create_node(This->result->nodesetval->nodeTab[This->resultPos]);
This->resultPos++;
return S_OK;
}
static HRESULT WINAPI queryresult_reset(
IXMLDOMNodeList* iface)
{
queryresult *This = impl_from_IXMLDOMNodeList( iface );
TRACE("%p\n", This);
This->resultPos = 0;
return S_OK;
}
static HRESULT WINAPI queryresult__newEnum(
IXMLDOMNodeList* iface,
IUnknown** ppUnk)
{
FIXME("\n");
return E_NOTIMPL;
}
static const struct IXMLDOMNodeListVtbl queryresult_vtbl =
{
queryresult_QueryInterface,
queryresult_AddRef,
queryresult_Release,
queryresult_GetTypeInfoCount,
queryresult_GetTypeInfo,
queryresult_GetIDsOfNames,
queryresult_Invoke,
queryresult_get_item,
queryresult_get_length,
queryresult_nextNode,
queryresult_reset,
queryresult__newEnum,
};
#endif