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