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