dlls/msxml3/xmlelem.c

   1 /*
   2  * XML Element implementation
   3  *
   4  * Copyright 2007 James Hawkins
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #define COBJMACROS
  22
  23 #include "config.h"
  24
  25 #include <stdarg.h>
  26 #include "windef.h"
  27 #include "winbase.h"
  28 #include "winuser.h"
  29 #include "ole2.h"
  30 #include "msxml2.h"
  31 #include "ocidl.h"
  32
  33 #include "wine/debug.h"
  34
  35 #include "msxml_private.h"
  36
  37 WINE_DEFAULT_DEBUG_CHANNEL(msxml);
  38
  39 #ifdef HAVE_LIBXML2
  40
  41 static HRESULT XMLElementCollection_create( IUnknown *pUnkOuter, xmlNodePtr node, LPVOID *ppObj );
  42
  43 /**********************************************************************
  44  * IXMLElement
  45  */
  46 typedef struct _xmlelem
  47 {
  48     const IXMLElementVtbl *lpVtbl;
  49     LONG ref;
  50     xmlNodePtr node;
  51 } xmlelem;
  52
  53 static inline xmlelem *impl_from_IXMLElement(IXMLElement *iface)
  54 {
  55     return (xmlelem *)((char*)iface - FIELD_OFFSET(xmlelem, lpVtbl));
  56 }
  57
  58 static HRESULT WINAPI xmlelem_QueryInterface(IXMLElement *iface, REFIID riid, void** ppvObject)
  59 {
  60     xmlelem *This = impl_from_IXMLElement(iface);
  61
  62     TRACE("%p %s %p\n", This, debugstr_guid(riid), ppvObject);
  63
  64     if (IsEqualGUID(riid, &IID_IUnknown) ||
  65         IsEqualGUID(riid, &IID_IXMLElement))
  66     {
  67         *ppvObject = iface;
  68     }
  69     else
  70     {
  71         FIXME("interface %s not implemented\n", debugstr_guid(riid));
  72         return E_NOINTERFACE;
  73     }
  74
  75     IXMLElement_AddRef(iface);
  76
  77     return S_OK;
  78 }
  79
  80 static ULONG WINAPI xmlelem_AddRef(IXMLElement *iface)
  81 {
  82     xmlelem *This = impl_from_IXMLElement(iface);
  83     TRACE("%p\n", This);
  84     return InterlockedIncrement(&This->ref);
  85 }
  86
  87 static ULONG WINAPI xmlelem_Release(IXMLElement *iface)
  88 {
  89     xmlelem *This = impl_from_IXMLElement(iface);
  90     LONG ref;
  91
  92     TRACE("%p\n", This);
  93
  94     ref = InterlockedDecrement(&This->ref);
  95     if (ref == 0)
  96     {
  97         HeapFree(GetProcessHeap(), 0, This);
  98     }
  99
 100     return ref;
 101 }
 102
 103 static HRESULT WINAPI xmlelem_GetTypeInfoCount(IXMLElement *iface, UINT* pctinfo)
 104 {
 105     xmlelem *This = impl_from_IXMLElement(iface);
 106
 107     TRACE("(%p)->(%p)\n", This, pctinfo);
 108
 109     *pctinfo = 1;
 110
 111     return S_OK;
 112 }
 113
 114 static HRESULT WINAPI xmlelem_GetTypeInfo(IXMLElement *iface, UINT iTInfo,
 115                                           LCID lcid, ITypeInfo** ppTInfo)
 116 {
 117     xmlelem *This = impl_from_IXMLElement(iface);
 118     HRESULT hr;
 119
 120     TRACE("(%p)->(%u %u %p)\n", This, iTInfo, lcid, ppTInfo);
 121
 122     hr = get_typeinfo(IXMLElement_tid, ppTInfo);
 123
 124     return hr;
 125 }
 126
 127 static HRESULT WINAPI xmlelem_GetIDsOfNames(IXMLElement *iface, REFIID riid,
 128                                             LPOLESTR* rgszNames, UINT cNames,
 129                                             LCID lcid, DISPID* rgDispId)
 130 {
 131     xmlelem *This = impl_from_IXMLElement(iface);
 132     ITypeInfo *typeinfo;
 133     HRESULT hr;
 134
 135     TRACE("(%p)->(%s %p %u %u %p)\n", This, debugstr_guid(riid), rgszNames, cNames,
 136           lcid, rgDispId);
 137
 138     if(!rgszNames || cNames == 0 || !rgDispId)
 139         return E_INVALIDARG;
 140
 141     hr = get_typeinfo(IXMLElement_tid, &typeinfo);
 142     if(SUCCEEDED(hr))
 143     {
 144         hr = ITypeInfo_GetIDsOfNames(typeinfo, rgszNames, cNames, rgDispId);
 145         ITypeInfo_Release(typeinfo);
 146     }
 147
 148     return hr;
 149 }
 150
 151 static HRESULT WINAPI xmlelem_Invoke(IXMLElement *iface, DISPID dispIdMember,
 152                                      REFIID riid, LCID lcid, WORD wFlags,
 153                                      DISPPARAMS* pDispParams, VARIANT* pVarResult,
 154                                      EXCEPINFO* pExcepInfo, UINT* puArgErr)
 155 {
 156     xmlelem *This = impl_from_IXMLElement(iface);
 157     ITypeInfo *typeinfo;
 158     HRESULT hr;
 159
 160     TRACE("(%p)->(%d %s %d %d %p %p %p %p)\n", This, dispIdMember, debugstr_guid(riid),
 161           lcid, wFlags, pDispParams, pVarResult, pExcepInfo, puArgErr);
 162
 163     hr = get_typeinfo(IXMLElement_tid, &typeinfo);
 164     if(SUCCEEDED(hr))
 165     {
 166         hr = ITypeInfo_Invoke(typeinfo, &(This->lpVtbl), dispIdMember, wFlags, pDispParams,
 167                 pVarResult, pExcepInfo, puArgErr);
 168         ITypeInfo_Release(typeinfo);
 169     }
 170
 171     return hr;
 172 }
 173
 174 static inline BSTR str_dup_upper(BSTR str)
 175 {
 176     INT len = (lstrlenW(str) + 1) * sizeof(WCHAR);
 177     BSTR p = SysAllocStringLen(NULL, len);
 178     if (p)
 179     {
 180         memcpy(p, str, len);
 181         CharUpperW(p);
 182     }
 183     return p;
 184 }
 185
 186 static HRESULT WINAPI xmlelem_get_tagName(IXMLElement *iface, BSTR *p)
 187 {
 188     xmlelem *This = impl_from_IXMLElement(iface);
 189     BSTR temp;
 190
 191     TRACE("(%p, %p)\n", iface, p);
 192
 193     if (!p)
 194         return E_INVALIDARG;
 195
 196     temp = bstr_from_xmlChar(This->node->name);
 197     *p = str_dup_upper(temp);
 198     SysFreeString(temp);
 199
 200     TRACE("returning %s\n", debugstr_w(*p));
 201
 202     return S_OK;
 203 }
 204
 205 static HRESULT WINAPI xmlelem_put_tagName(IXMLElement *iface, BSTR p)
 206 {
 207     FIXME("(%p, %p): stub\n", iface, p);
 208
 209     if (!p)
 210         return E_INVALIDARG;
 211
 212     return E_NOTIMPL;
 213 }
 214
 215 static HRESULT WINAPI xmlelem_get_parent(IXMLElement *iface, IXMLElement **parent)
 216 {
 217     xmlelem *This = impl_from_IXMLElement(iface);
 218
 219     TRACE("(%p, %p)\n", iface, parent);
 220
 221     if (!parent)
 222         return E_INVALIDARG;
 223
 224     *parent = NULL;
 225
 226     if (!This->node->parent)
 227         return S_FALSE;
 228
 229     return XMLElement_create((IUnknown *)iface, This->node->parent, (LPVOID *)parent);
 230 }
 231
 232 static HRESULT WINAPI xmlelem_setAttribute(IXMLElement *iface, BSTR strPropertyName,
 233                                             VARIANT PropertyValue)
 234 {
 235     xmlelem *This = impl_from_IXMLElement(iface);
 236     xmlChar *name, *value;
 237     xmlAttrPtr attr;
 238
 239     TRACE("(%p, %s)\n", iface, debugstr_w(strPropertyName));
 240
 241     if (!strPropertyName || V_VT(&PropertyValue) != VT_BSTR)
 242         return E_INVALIDARG;
 243
 244     name = xmlChar_from_wchar(strPropertyName);
 245     value = xmlChar_from_wchar(V_BSTR(&PropertyValue));
 246     attr = xmlSetProp(This->node, name, value);
 247
 248     HeapFree(GetProcessHeap(), 0, name);
 249     HeapFree(GetProcessHeap(), 0, value);
 250     return (attr) ? S_OK : S_FALSE;
 251 }
 252
 253 static HRESULT WINAPI xmlelem_getAttribute(IXMLElement *iface, BSTR strPropertyName,
 254                                            VARIANT *PropertyValue)
 255 {
 256     xmlelem *This = impl_from_IXMLElement(iface);
 257     xmlChar *val = NULL, *name;
 258     xmlAttrPtr ptr;
 259
 260     TRACE("(%p, %s, %p)\n", iface, debugstr_w(strPropertyName), PropertyValue);
 261
 262     if (!PropertyValue)
 263         return E_INVALIDARG;
 264
 265     VariantInit(PropertyValue);
 266     V_BSTR(PropertyValue) = NULL;
 267
 268     if (!strPropertyName)
 269         return E_INVALIDARG;
 270
 271     name = xmlChar_from_wchar(strPropertyName);
 272     ptr = This->node->properties;
 273     while (ptr)
 274     {
 275         if (!lstrcmpiA((LPSTR)name, (LPCSTR)ptr->name))
 276         {
 277             val = xmlNodeListGetString(ptr->doc, ptr->children, 1);
 278             break;
 279         }
 280
 281         ptr = ptr->next;
 282     }
 283
 284     if (val)
 285     {
 286         V_VT(PropertyValue) = VT_BSTR;
 287         V_BSTR(PropertyValue) = bstr_from_xmlChar(val);
 288     }
 289
 290     HeapFree(GetProcessHeap(), 0, name);
 291     xmlFree(val);
 292     TRACE("returning %s\n", debugstr_w(V_BSTR(PropertyValue)));
 293     return (val) ? S_OK : S_FALSE;
 294 }
 295
 296 static HRESULT WINAPI xmlelem_removeAttribute(IXMLElement *iface, BSTR strPropertyName)
 297 {
 298     xmlelem *This = impl_from_IXMLElement(iface);
 299     xmlChar *name;
 300     xmlAttrPtr attr;
 301     int res;
 302     HRESULT hr = S_FALSE;
 303
 304     TRACE("(%p, %s)\n", iface, debugstr_w(strPropertyName));
 305
 306     if (!strPropertyName)
 307         return E_INVALIDARG;
 308
 309     name = xmlChar_from_wchar(strPropertyName);
 310     attr = xmlHasProp(This->node, name);
 311     if (!attr)
 312         goto done;
 313
 314     res = xmlRemoveProp(attr);
 315
 316     if (res == 0)
 317         hr = S_OK;
 318
 319 done:
 320     HeapFree(GetProcessHeap(), 0, name);
 321     return hr;
 322 }
 323
 324 static HRESULT WINAPI xmlelem_get_children(IXMLElement *iface, IXMLElementCollection **p)
 325 {
 326     xmlelem *This = impl_from_IXMLElement(iface);
 327
 328     TRACE("(%p, %p)\n", iface, p);
 329
 330     if (!p)
 331         return E_INVALIDARG;
 332
 333     return XMLElementCollection_create((IUnknown *)iface, This->node->children, (LPVOID *)p);
 334 }
 335
 336 static long type_libxml_to_msxml(xmlElementType type)
 337 {
 338     switch (type)
 339     {
 340         case XML_ELEMENT_NODE:
 341             return XMLELEMTYPE_ELEMENT;
 342         case XML_TEXT_NODE:
 343             return XMLELEMTYPE_TEXT;
 344         case XML_COMMENT_NODE:
 345             return XMLELEMTYPE_COMMENT;
 346         case XML_DOCUMENT_NODE:
 347             return XMLELEMTYPE_DOCUMENT;
 348         case XML_DTD_NODE:
 349             return XMLELEMTYPE_DTD;
 350         case XML_PI_NODE:
 351             return XMLELEMTYPE_PI;
 352         default:
 353             break;
 354     }
 355
 356     return XMLELEMTYPE_OTHER;
 357 }
 358
 359 static HRESULT WINAPI xmlelem_get_type(IXMLElement *iface, long *p)
 360 {
 361     xmlelem *This = impl_from_IXMLElement(iface);
 362
 363     TRACE("(%p, %p)\n", This, p);
 364
 365     if (!p)
 366         return E_INVALIDARG;
 367
 368     *p = type_libxml_to_msxml(This->node->type);
 369     TRACE("returning %ld\n", *p);
 370     return S_OK;
 371 }
 372
 373 static HRESULT WINAPI xmlelem_get_text(IXMLElement *iface, BSTR *p)
 374 {
 375     xmlelem *This = impl_from_IXMLElement(iface);
 376     xmlChar *content;
 377
 378     TRACE("(%p, %p)\n", iface, p);
 379
 380     if (!p)
 381         return E_INVALIDARG;
 382
 383     content = xmlNodeGetContent(This->node);
 384     *p = bstr_from_xmlChar(content);
 385     TRACE("returning %s\n", debugstr_w(*p));
 386
 387     xmlFree(content);
 388     return S_OK;
 389 }
 390
 391 static HRESULT WINAPI xmlelem_put_text(IXMLElement *iface, BSTR p)
 392 {
 393     xmlelem *This = impl_from_IXMLElement(iface);
 394     xmlChar *content;
 395
 396     TRACE("(%p, %s)\n", iface, debugstr_w(p));
 397
 398     /* FIXME: test which types can be used */
 399     if (This->node->type == XML_ELEMENT_NODE)
 400         return E_NOTIMPL;
 401
 402     content = xmlChar_from_wchar(p);
 403     xmlNodeSetContent(This->node, content);
 404
 405     HeapFree( GetProcessHeap(), 0, content);
 406
 407     return S_OK;
 408 }
 409
 410 static HRESULT WINAPI xmlelem_addChild(IXMLElement *iface, IXMLElement *pChildElem,
 411                                         long lIndex, long lreserved)
 412 {
 413     xmlelem *This = impl_from_IXMLElement(iface);
 414     xmlelem *childElem = impl_from_IXMLElement(pChildElem);
 415     xmlNodePtr child;
 416
 417     TRACE("(%p, %p, %ld, %ld)\n", iface, pChildElem, lIndex, lreserved);
 418
 419     if (lIndex == 0)
 420         child = xmlAddChild(This->node, childElem->node);
 421     else
 422         child = xmlAddNextSibling(This->node, childElem->node->last);
 423
 424     return (child) ? S_OK : S_FALSE;
 425 }
 426
 427 static HRESULT WINAPI xmlelem_removeChild(IXMLElement *iface, IXMLElement *pChildElem)
 428 {
 429     FIXME("(%p, %p): stub\n", iface, pChildElem);
 430     return E_NOTIMPL;
 431 }
 432
 433 static const struct IXMLElementVtbl xmlelem_vtbl =
 434 {
 435     xmlelem_QueryInterface,
 436     xmlelem_AddRef,
 437     xmlelem_Release,
 438     xmlelem_GetTypeInfoCount,
 439     xmlelem_GetTypeInfo,
 440     xmlelem_GetIDsOfNames,
 441     xmlelem_Invoke,
 442     xmlelem_get_tagName,
 443     xmlelem_put_tagName,
 444     xmlelem_get_parent,
 445     xmlelem_setAttribute,
 446     xmlelem_getAttribute,
 447     xmlelem_removeAttribute,
 448     xmlelem_get_children,
 449     xmlelem_get_type,
 450     xmlelem_get_text,
 451     xmlelem_put_text,
 452     xmlelem_addChild,
 453     xmlelem_removeChild
 454 };
 455
 456 HRESULT XMLElement_create(IUnknown *pUnkOuter, xmlNodePtr node, LPVOID *ppObj)
 457 {
 458     xmlelem *elem;
 459
 460     TRACE("(%p,%p)\n", pUnkOuter, ppObj);
 461
 462     if (!ppObj)
 463         return E_INVALIDARG;
 464
 465     *ppObj = NULL;
 466
 467     elem = HeapAlloc(GetProcessHeap(), 0, sizeof (*elem));
 468     if(!elem)
 469         return E_OUTOFMEMORY;
 470
 471     elem->lpVtbl = &xmlelem_vtbl;
 472     elem->ref = 1;
 473     elem->node = node;
 474
 475     *ppObj = &elem->lpVtbl;
 476
 477     TRACE("returning iface %p\n", *ppObj);
 478     return S_OK;
 479 }
 480
 481 /************************************************************************
 482  * IXMLElementCollection
 483  */
 484 typedef struct _xmlelem_collection
 485 {
 486     const IXMLElementCollectionVtbl *lpVtbl;
 487     const IEnumVARIANTVtbl          *lpvtblIEnumVARIANT;
 488     LONG ref;
 489     LONG length;
 490     xmlNodePtr node;
 491
 492     /* IEnumVARIANT members */
 493     xmlNodePtr current;
 494 } xmlelem_collection;
 495
 496 static inline xmlelem_collection *impl_from_IXMLElementCollection(IXMLElementCollection *iface)
 497 {
 498     return (xmlelem_collection *)((char*)iface - FIELD_OFFSET(xmlelem_collection, lpVtbl));
 499 }
 500
 501 static inline xmlelem_collection *impl_from_IEnumVARIANT(IEnumVARIANT *iface)
 502 {
 503     return (xmlelem_collection *)((char*)iface - FIELD_OFFSET(xmlelem_collection, lpvtblIEnumVARIANT));
 504 }
 505
 506 static HRESULT WINAPI xmlelem_collection_QueryInterface(IXMLElementCollection *iface, REFIID riid, void** ppvObject)
 507 {
 508     xmlelem_collection *This = impl_from_IXMLElementCollection(iface);
 509
 510     TRACE("%p %s %p\n", This, debugstr_guid(riid), ppvObject);
 511
 512     if (IsEqualGUID(riid, &IID_IUnknown) ||
 513         IsEqualGUID(riid, &IID_IXMLElementCollection))
 514     {
 515         *ppvObject = iface;
 516     }
 517     else if (IsEqualGUID(riid, &IID_IEnumVARIANT))
 518     {
 519         *ppvObject = &(This->lpvtblIEnumVARIANT);
 520     }
 521     else
 522     {
 523         FIXME("interface %s not implemented\n", debugstr_guid(riid));
 524         return E_NOINTERFACE;
 525     }
 526
 527     IXMLElementCollection_AddRef(iface);
 528
 529     return S_OK;
 530 }
 531
 532 static ULONG WINAPI xmlelem_collection_AddRef(IXMLElementCollection *iface)
 533 {
 534     xmlelem_collection *This = impl_from_IXMLElementCollection(iface);
 535     TRACE("%p\n", This);
 536     return InterlockedIncrement(&This->ref);
 537 }
 538
 539 static ULONG WINAPI xmlelem_collection_Release(IXMLElementCollection *iface)
 540 {
 541     xmlelem_collection *This = impl_from_IXMLElementCollection(iface);
 542     LONG ref;
 543
 544     TRACE("%p\n", This);
 545
 546     ref = InterlockedDecrement(&This->ref);
 547     if (ref == 0)
 548     {
 549         HeapFree(GetProcessHeap(), 0, This);
 550     }
 551
 552     return ref;
 553 }
 554
 555 static HRESULT WINAPI xmlelem_collection_GetTypeInfoCount(IXMLElementCollection *iface, UINT* pctinfo)
 556 {
 557     FIXME("\n");
 558     return E_NOTIMPL;
 559 }
 560
 561 static HRESULT WINAPI xmlelem_collection_GetTypeInfo(IXMLElementCollection *iface, UINT iTInfo,
 562                                                      LCID lcid, ITypeInfo** ppTInfo)
 563 {
 564     FIXME("\n");
 565     return E_NOTIMPL;
 566 }
 567
 568 static HRESULT WINAPI xmlelem_collection_GetIDsOfNames(IXMLElementCollection *iface, REFIID riid,
 569                                                        LPOLESTR* rgszNames, UINT cNames,
 570                                                        LCID lcid, DISPID* rgDispId)
 571 {
 572     FIXME("\n");
 573     return E_NOTIMPL;
 574 }
 575
 576 static HRESULT WINAPI xmlelem_collection_Invoke(IXMLElementCollection *iface, DISPID dispIdMember,
 577                                                 REFIID riid, LCID lcid, WORD wFlags,
 578                                                 DISPPARAMS* pDispParams, VARIANT* pVarResult,
 579                                                 EXCEPINFO* pExcepInfo, UINT* puArgErr)
 580 {
 581     FIXME("\n");
 582     return E_NOTIMPL;
 583 }
 584
 585 static HRESULT WINAPI xmlelem_collection_put_length(IXMLElementCollection *iface, long v)
 586 {
 587     TRACE("(%p, %ld)\n", iface, v);
 588     return E_FAIL;
 589 }
 590
 591 static HRESULT WINAPI xmlelem_collection_get_length(IXMLElementCollection *iface, long *p)
 592 {
 593     xmlelem_collection *This = impl_from_IXMLElementCollection(iface);
 594
 595     TRACE("(%p, %p)\n", iface, p);
 596
 597     if (!p)
 598         return E_INVALIDARG;
 599
 600     *p = This->length;
 601     return S_OK;
 602 }
 603
 604 static HRESULT WINAPI xmlelem_collection_get__newEnum(IXMLElementCollection *iface, IUnknown **ppUnk)
 605 {
 606     xmlelem_collection *This = impl_from_IXMLElementCollection(iface);
 607
 608     TRACE("(%p, %p)\n", iface, ppUnk);
 609
 610     if (!ppUnk)
 611         return E_INVALIDARG;
 612
 613     *ppUnk = (IUnknown *)This;
 614     IUnknown_AddRef(*ppUnk);
 615     return S_OK;
 616 }
 617
 618 static HRESULT WINAPI xmlelem_collection_item(IXMLElementCollection *iface, VARIANT var1,
 619                                               VARIANT var2, IDispatch **ppDisp)
 620 {
 621     xmlelem_collection *This = impl_from_IXMLElementCollection(iface);
 622     xmlNodePtr ptr = This->node;
 623     int index, i;
 624
 625     TRACE("(%p, %p)\n", iface, ppDisp);
 626
 627     if (!ppDisp)
 628         return E_INVALIDARG;
 629
 630     *ppDisp = NULL;
 631
 632     index = V_I4(&var1);
 633     if (index < 0)
 634         return E_INVALIDARG;
 635     if (index >= This->length)
 636         return E_FAIL;
 637
 638     for (i = 0; i < index; i++)
 639         ptr = ptr->next;
 640
 641     return XMLElement_create((IUnknown *)iface, ptr, (LPVOID *)ppDisp);
 642 }
 643
 644 static const struct IXMLElementCollectionVtbl xmlelem_collection_vtbl =
 645 {
 646     xmlelem_collection_QueryInterface,
 647     xmlelem_collection_AddRef,
 648     xmlelem_collection_Release,
 649     xmlelem_collection_GetTypeInfoCount,
 650     xmlelem_collection_GetTypeInfo,
 651     xmlelem_collection_GetIDsOfNames,
 652     xmlelem_collection_Invoke,
 653     xmlelem_collection_put_length,
 654     xmlelem_collection_get_length,
 655     xmlelem_collection_get__newEnum,
 656     xmlelem_collection_item
 657 };
 658
 659 /************************************************************************
 660  * xmlelem_collection implementation of IEnumVARIANT.
 661  */
 662 static HRESULT WINAPI xmlelem_collection_IEnumVARIANT_QueryInterface(
 663     IEnumVARIANT *iface, REFIID riid, LPVOID *ppvObj)
 664 {
 665     xmlelem_collection *this = impl_from_IEnumVARIANT(iface);
 666     return IXMLDocument_QueryInterface((IXMLDocument *)this, riid, ppvObj);
 667 }
 668
 669 static ULONG WINAPI xmlelem_collection_IEnumVARIANT_AddRef(
 670     IEnumVARIANT *iface)
 671 {
 672     xmlelem_collection *this = impl_from_IEnumVARIANT(iface);
 673     return IXMLDocument_AddRef((IXMLDocument *)this);
 674 }
 675
 676 static ULONG WINAPI xmlelem_collection_IEnumVARIANT_Release(
 677     IEnumVARIANT *iface)
 678 {
 679     xmlelem_collection *this = impl_from_IEnumVARIANT(iface);
 680     return IXMLDocument_Release((IXMLDocument *)this);
 681 }
 682
 683 static HRESULT WINAPI xmlelem_collection_IEnumVARIANT_Next(
 684     IEnumVARIANT *iface, ULONG celt, VARIANT *rgVar, ULONG *pCeltFetched)
 685 {
 686     xmlelem_collection *This = impl_from_IEnumVARIANT(iface);
 687     xmlNodePtr ptr = This->current;
 688
 689     TRACE("(%p, %d, %p, %p)\n", iface, celt, rgVar, pCeltFetched);
 690
 691     if (!rgVar)
 692         return E_INVALIDARG;
 693
 694     /* FIXME: handle celt */
 695     if (pCeltFetched)
 696         *pCeltFetched = 1;
 697
 698     This->current = This->current->next;
 699
 700     V_VT(rgVar) = VT_DISPATCH;
 701     return XMLElement_create((IUnknown *)iface, ptr, (LPVOID *)&V_DISPATCH(rgVar));
 702 }
 703
 704 static HRESULT WINAPI xmlelem_collection_IEnumVARIANT_Skip(
 705     IEnumVARIANT *iface, ULONG celt)
 706 {
 707     FIXME("(%p, %d): stub\n", iface, celt);
 708     return E_NOTIMPL;
 709 }
 710
 711 static HRESULT WINAPI xmlelem_collection_IEnumVARIANT_Reset(
 712     IEnumVARIANT *iface)
 713 {
 714     xmlelem_collection *This = impl_from_IEnumVARIANT(iface);
 715     This->current = This->node;
 716     return S_OK;
 717 }
 718
 719 static HRESULT WINAPI xmlelem_collection_IEnumVARIANT_Clone(
 720     IEnumVARIANT *iface, IEnumVARIANT **ppEnum)
 721 {
 722     FIXME("(%p, %p): stub\n", iface, ppEnum);
 723     return E_NOTIMPL;
 724 }
 725
 726 static const struct IEnumVARIANTVtbl xmlelem_collection_IEnumVARIANTvtbl =
 727 {
 728     xmlelem_collection_IEnumVARIANT_QueryInterface,
 729     xmlelem_collection_IEnumVARIANT_AddRef,
 730     xmlelem_collection_IEnumVARIANT_Release,
 731     xmlelem_collection_IEnumVARIANT_Next,
 732     xmlelem_collection_IEnumVARIANT_Skip,
 733     xmlelem_collection_IEnumVARIANT_Reset,
 734     xmlelem_collection_IEnumVARIANT_Clone
 735 };
 736
 737 static HRESULT XMLElementCollection_create(IUnknown *pUnkOuter, xmlNodePtr node, LPVOID *ppObj)
 738 {
 739     xmlelem_collection *collection;
 740     xmlNodePtr ptr;
 741
 742     TRACE("(%p,%p)\n", pUnkOuter, ppObj);
 743
 744     *ppObj = NULL;
 745
 746     if (!node)
 747         return S_FALSE;
 748
 749     collection = HeapAlloc(GetProcessHeap(), 0, sizeof (*collection));
 750     if(!collection)
 751         return E_OUTOFMEMORY;
 752
 753     collection->lpVtbl = &xmlelem_collection_vtbl;
 754     collection->lpvtblIEnumVARIANT = &xmlelem_collection_IEnumVARIANTvtbl;
 755     collection->ref = 1;
 756     collection->length = 0;
 757     collection->node = node;
 758     collection->current = node;
 759
 760     ptr = node;
 761     while (ptr)
 762     {
 763         collection->length++;
 764         ptr = ptr->next;
 765     }
 766
 767     *ppObj = &collection->lpVtbl;
 768
 769     TRACE("returning iface %p\n", *ppObj);
 770     return S_OK;
 771 }
 772
 773 #endif