dlls/msxml3/nodelist.c

   1 /*
   2  *    Node list implementation
   3  *
   4  * Copyright 2005 Mike McCormack
   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 #ifdef HAVE_LIBXML2
  27 # include <libxml/parser.h>
  28 # include <libxml/xmlerror.h>
  29 #endif
  30
  31 #include "windef.h"
  32 #include "winbase.h"
  33 #include "winuser.h"
  34 #include "ole2.h"
  35 #include "msxml6.h"
  36 #include "msxml2did.h"
  37
  38 #include "msxml_private.h"
  39
  40 #include "wine/debug.h"
  41
  42 /* This file implements the object returned by childNodes property. Note that this is
  43  * not the IXMLDOMNodeList returned by XPath queries - it's implemented in selection.c.
  44  * They are different because the list returned by childNodes:
  45  *  - is "live" - changes to the XML tree are automatically reflected in the list
  46  *  - doesn't supports IXMLDOMSelection
  47  *  - note that an attribute node have a text child in DOM but not in the XPath data model
  48  *    thus the child is inaccessible by an XPath query
  49  */
  50
  51 WINE_DEFAULT_DEBUG_CHANNEL(msxml);
  52
  53 #ifdef HAVE_LIBXML2
  54
  55 typedef struct
  56 {
  57     DispatchEx dispex;
  58     IXMLDOMNodeList IXMLDOMNodeList_iface;
  59     LONG ref;
  60     xmlNodePtr parent;
  61     xmlNodePtr current;
  62     IEnumVARIANT *enumvariant;
  63 } xmlnodelist;
  64
  65 static HRESULT nodelist_get_item(IUnknown *iface, LONG index, VARIANT *item)
  66 {
  67     V_VT(item) = VT_DISPATCH;
  68     return IXMLDOMNodeList_get_item((IXMLDOMNodeList*)iface, index, (IXMLDOMNode**)&V_DISPATCH(item));
  69 }
  70
  71 static const struct enumvariant_funcs nodelist_enumvariant = {
  72     nodelist_get_item,
  73     NULL
  74 };
  75
  76 static inline xmlnodelist *impl_from_IXMLDOMNodeList( IXMLDOMNodeList *iface )
  77 {
  78     return CONTAINING_RECORD(iface, xmlnodelist, IXMLDOMNodeList_iface);
  79 }
  80
  81 static HRESULT WINAPI xmlnodelist_QueryInterface(
  82     IXMLDOMNodeList *iface,
  83     REFIID riid,
  84     void** ppvObject )
  85 {
  86     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
  87
  88     TRACE("(%p)->(%s %p)\n", This, debugstr_guid(riid), ppvObject);
  89
  90     if ( IsEqualGUID( riid, &IID_IUnknown ) ||
  91          IsEqualGUID( riid, &IID_IDispatch ) ||
  92          IsEqualGUID( riid, &IID_IXMLDOMNodeList ) )
  93     {
  94         *ppvObject = iface;
  95     }
  96     else if (IsEqualGUID( riid, &IID_IEnumVARIANT ))
  97     {
  98         if (!This->enumvariant)
  99         {
 100             HRESULT hr = create_enumvariant((IUnknown*)iface, FALSE, &nodelist_enumvariant, &This->enumvariant);
 101             if (FAILED(hr)) return hr;
 102         }
 103
 104         return IEnumVARIANT_QueryInterface(This->enumvariant, &IID_IEnumVARIANT, ppvObject);
 105     }
 106     else if (dispex_query_interface(&This->dispex, riid, ppvObject))
 107     {
 108         return *ppvObject ? S_OK : E_NOINTERFACE;
 109     }
 110     else
 111     {
 112         TRACE("interface %s not implemented\n", debugstr_guid(riid));
 113         *ppvObject = NULL;
 114         return E_NOINTERFACE;
 115     }
 116
 117     IXMLDOMNodeList_AddRef( iface );
 118
 119     return S_OK;
 120 }
 121
 122 static ULONG WINAPI xmlnodelist_AddRef(
 123     IXMLDOMNodeList *iface )
 124 {
 125     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
 126     ULONG ref = InterlockedIncrement( &This->ref );
 127     TRACE("(%p)->(%d)\n", This, ref);
 128     return ref;
 129 }
 130
 131 static ULONG WINAPI xmlnodelist_Release(
 132     IXMLDOMNodeList *iface )
 133 {
 134     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
 135     ULONG ref = InterlockedDecrement( &This->ref );
 136
 137     TRACE("(%p)->(%d)\n", This, ref);
 138     if ( ref == 0 )
 139     {
 140         xmldoc_release( This->parent->doc );
 141         if (This->enumvariant) IEnumVARIANT_Release(This->enumvariant);
 142         heap_free( This );
 143     }
 144
 145     return ref;
 146 }
 147
 148 static HRESULT WINAPI xmlnodelist_GetTypeInfoCount(
 149     IXMLDOMNodeList *iface,
 150     UINT* pctinfo )
 151 {
 152     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
 153     return IDispatchEx_GetTypeInfoCount(&This->dispex.IDispatchEx_iface, pctinfo);
 154 }
 155
 156 static HRESULT WINAPI xmlnodelist_GetTypeInfo(
 157     IXMLDOMNodeList *iface,
 158     UINT iTInfo,
 159     LCID lcid,
 160     ITypeInfo** ppTInfo )
 161 {
 162     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
 163     return IDispatchEx_GetTypeInfo(&This->dispex.IDispatchEx_iface,
 164         iTInfo, lcid, ppTInfo);
 165 }
 166
 167 static HRESULT WINAPI xmlnodelist_GetIDsOfNames(
 168     IXMLDOMNodeList *iface,
 169     REFIID riid,
 170     LPOLESTR* rgszNames,
 171     UINT cNames,
 172     LCID lcid,
 173     DISPID* rgDispId )
 174 {
 175     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
 176     return IDispatchEx_GetIDsOfNames(&This->dispex.IDispatchEx_iface,
 177         riid, rgszNames, cNames, lcid, rgDispId);
 178 }
 179
 180 static HRESULT WINAPI xmlnodelist_Invoke(
 181     IXMLDOMNodeList *iface,
 182     DISPID dispIdMember,
 183     REFIID riid,
 184     LCID lcid,
 185     WORD wFlags,
 186     DISPPARAMS* pDispParams,
 187     VARIANT* pVarResult,
 188     EXCEPINFO* pExcepInfo,
 189     UINT* puArgErr )
 190 {
 191     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
 192     return IDispatchEx_Invoke(&This->dispex.IDispatchEx_iface,
 193         dispIdMember, riid, lcid, wFlags, pDispParams, pVarResult, pExcepInfo, puArgErr);
 194 }
 195
 196 static HRESULT WINAPI xmlnodelist_get_item(
 197         IXMLDOMNodeList* iface,
 198         LONG index,
 199         IXMLDOMNode** listItem)
 200 {
 201     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
 202     xmlNodePtr curr;
 203     LONG nodeIndex = 0;
 204
 205     TRACE("(%p)->(%d %p)\n", This, index, listItem);
 206
 207     if(!listItem)
 208         return E_INVALIDARG;
 209
 210     *listItem = NULL;
 211
 212     if (index < 0)
 213         return S_FALSE;
 214
 215     curr = This->parent->children;
 216     while(curr)
 217     {
 218         if(nodeIndex++ == index) break;
 219         curr = curr->next;
 220     }
 221     if(!curr) return S_FALSE;
 222
 223     *listItem = create_node( curr );
 224
 225     return S_OK;
 226 }
 227
 228 static HRESULT WINAPI xmlnodelist_get_length(
 229         IXMLDOMNodeList* iface,
 230         LONG* listLength)
 231 {
 232
 233     xmlNodePtr curr;
 234     LONG nodeCount = 0;
 235
 236     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
 237
 238     TRACE("(%p)->(%p)\n", This, listLength);
 239
 240     if(!listLength)
 241         return E_INVALIDARG;
 242
 243     curr = This->parent->children;
 244     while (curr)
 245     {
 246         nodeCount++;
 247         curr = curr->next;
 248     }
 249
 250     *listLength = nodeCount;
 251     return S_OK;
 252 }
 253
 254 static HRESULT WINAPI xmlnodelist_nextNode(
 255         IXMLDOMNodeList* iface,
 256         IXMLDOMNode** nextItem)
 257 {
 258     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
 259
 260     TRACE("(%p)->(%p)\n", This, nextItem );
 261
 262     if(!nextItem)
 263         return E_INVALIDARG;
 264
 265     *nextItem = NULL;
 266
 267     if (!This->current)
 268         return S_FALSE;
 269
 270     *nextItem = create_node( This->current );
 271     This->current = This->current->next;
 272     return S_OK;
 273 }
 274
 275 static HRESULT WINAPI xmlnodelist_reset(
 276         IXMLDOMNodeList* iface)
 277 {
 278     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
 279
 280     TRACE("%p\n", This);
 281     This->current = This->parent->children;
 282     return S_OK;
 283 }
 284
 285 static HRESULT WINAPI xmlnodelist__newEnum(
 286         IXMLDOMNodeList* iface,
 287         IUnknown** enumv)
 288 {
 289     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
 290     TRACE("(%p)->(%p)\n", This, enumv);
 291     return create_enumvariant((IUnknown*)iface, TRUE, &nodelist_enumvariant, (IEnumVARIANT**)enumv);
 292 }
 293
 294 static const struct IXMLDOMNodeListVtbl xmlnodelist_vtbl =
 295 {
 296     xmlnodelist_QueryInterface,
 297     xmlnodelist_AddRef,
 298     xmlnodelist_Release,
 299     xmlnodelist_GetTypeInfoCount,
 300     xmlnodelist_GetTypeInfo,
 301     xmlnodelist_GetIDsOfNames,
 302     xmlnodelist_Invoke,
 303     xmlnodelist_get_item,
 304     xmlnodelist_get_length,
 305     xmlnodelist_nextNode,
 306     xmlnodelist_reset,
 307     xmlnodelist__newEnum,
 308 };
 309
 310 static HRESULT xmlnodelist_get_dispid(IUnknown *iface, BSTR name, DWORD flags, DISPID *dispid)
 311 {
 312     WCHAR *ptr;
 313     int idx = 0;
 314
 315     for(ptr = name; *ptr && isdigitW(*ptr); ptr++)
 316         idx = idx*10 + (*ptr-'0');
 317     if(*ptr)
 318         return DISP_E_UNKNOWNNAME;
 319
 320     *dispid = DISPID_DOM_COLLECTION_BASE + idx;
 321     TRACE("ret %x\n", *dispid);
 322     return S_OK;
 323 }
 324
 325 static HRESULT xmlnodelist_invoke(IUnknown *iface, DISPID id, LCID lcid, WORD flags, DISPPARAMS *params,
 326         VARIANT *res, EXCEPINFO *ei)
 327 {
 328     xmlnodelist *This = impl_from_IXMLDOMNodeList( (IXMLDOMNodeList*)iface );
 329
 330     TRACE("(%p)->(%x %x %x %p %p %p)\n", This, id, lcid, flags, params, res, ei);
 331
 332     V_VT(res) = VT_DISPATCH;
 333     V_DISPATCH(res) = NULL;
 334
 335     if (id < DISPID_DOM_COLLECTION_BASE || id > DISPID_DOM_COLLECTION_MAX)
 336         return DISP_E_UNKNOWNNAME;
 337
 338     switch(flags)
 339     {
 340         case INVOKE_PROPERTYGET:
 341         {
 342             IXMLDOMNode *disp = NULL;
 343
 344             IXMLDOMNodeList_get_item(&This->IXMLDOMNodeList_iface, id - DISPID_DOM_COLLECTION_BASE, &disp);
 345             V_DISPATCH(res) = (IDispatch*)disp;
 346             break;
 347         }
 348         default:
 349         {
 350             FIXME("unimplemented flags %x\n", flags);
 351             break;
 352         }
 353     }
 354
 355     TRACE("ret %p\n", V_DISPATCH(res));
 356
 357     return S_OK;
 358 }
 359
 360 static const dispex_static_data_vtbl_t xmlnodelist_dispex_vtbl = {
 361     xmlnodelist_get_dispid,
 362     xmlnodelist_invoke
 363 };
 364
 365 static const tid_t xmlnodelist_iface_tids[] = {
 366     IXMLDOMNodeList_tid,
 367     0
 368 };
 369 static dispex_static_data_t xmlnodelist_dispex = {
 370     &xmlnodelist_dispex_vtbl,
 371     IXMLDOMNodeList_tid,
 372     NULL,
 373     xmlnodelist_iface_tids
 374 };
 375
 376 IXMLDOMNodeList* create_children_nodelist( xmlNodePtr node )
 377 {
 378     xmlnodelist *This;
 379
 380     This = heap_alloc( sizeof *This );
 381     if ( !This )
 382         return NULL;
 383
 384     This->IXMLDOMNodeList_iface.lpVtbl = &xmlnodelist_vtbl;
 385     This->ref = 1;
 386     This->parent = node;
 387     This->current = node->children;
 388     This->enumvariant = NULL;
 389     xmldoc_add_ref( node->doc );
 390
 391     init_dispex(&This->dispex, (IUnknown*)&This->IXMLDOMNodeList_iface, &xmlnodelist_dispex);
 392
 393     return &This->IXMLDOMNodeList_iface;
 394 }
 395
 396 #endif