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 #include "windef.h"
  27 #include "winbase.h"
  28 #include "winuser.h"
  29 #include "ole2.h"
  30 #include "msxml2.h"
  31
  32 #include "msxml_private.h"
  33
  34 #include "wine/debug.h"
  35
  36 /* This file implements the object returned by childNodes property. Note that this is
  37  * not the IXMLDOMNodeList returned by XPath querites - it's implemented in queryresult.c.
  38  * They are different because the list returned by childNodes:
  39  *  - is "live" - changes to the XML tree are automatically reflected in the list
  40  *  - doesn't supports IXMLDOMSelection
  41  *  - note that an attribute node have a text child in DOM but not in the XPath data model
  42  *    thus the child is inaccessible by an XPath query
  43  */
  44
  45 WINE_DEFAULT_DEBUG_CHANNEL(msxml);
  46
  47 #ifdef HAVE_LIBXML2
  48
  49 typedef struct _xmlnodelist
  50 {
  51     const struct IXMLDOMNodeListVtbl *lpVtbl;
  52     LONG ref;
  53     xmlNodePtr parent;
  54     xmlNodePtr current;
  55 } xmlnodelist;
  56
  57 static inline xmlnodelist *impl_from_IXMLDOMNodeList( IXMLDOMNodeList *iface )
  58 {
  59     return (xmlnodelist *)((char*)iface - FIELD_OFFSET(xmlnodelist, lpVtbl));
  60 }
  61
  62 static HRESULT WINAPI xmlnodelist_QueryInterface(
  63     IXMLDOMNodeList *iface,
  64     REFIID riid,
  65     void** ppvObject )
  66 {
  67     TRACE("(%p)->(%s %p)\n", iface, debugstr_guid(riid), ppvObject);
  68
  69     if(!ppvObject)
  70         return E_INVALIDARG;
  71
  72     if ( IsEqualGUID( riid, &IID_IUnknown ) ||
  73          IsEqualGUID( riid, &IID_IDispatch ) ||
  74          IsEqualGUID( riid, &IID_IXMLDOMNodeList ) )
  75     {
  76         *ppvObject = iface;
  77     }
  78     else
  79     {
  80         FIXME("interface %s not implemented\n", debugstr_guid(riid));
  81         *ppvObject = NULL;
  82         return E_NOINTERFACE;
  83     }
  84
  85     IXMLDOMNodeList_AddRef( iface );
  86
  87     return S_OK;
  88 }
  89
  90 static ULONG WINAPI xmlnodelist_AddRef(
  91     IXMLDOMNodeList *iface )
  92 {
  93     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
  94     return InterlockedIncrement( &This->ref );
  95 }
  96
  97 static ULONG WINAPI xmlnodelist_Release(
  98     IXMLDOMNodeList *iface )
  99 {
 100     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
 101     ULONG ref;
 102
 103     ref = InterlockedDecrement( &This->ref );
 104     if ( ref == 0 )
 105     {
 106         xmldoc_release( This->parent->doc );
 107         heap_free( This );
 108     }
 109
 110     return ref;
 111 }
 112
 113 static HRESULT WINAPI xmlnodelist_GetTypeInfoCount(
 114     IXMLDOMNodeList *iface,
 115     UINT* pctinfo )
 116 {
 117     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
 118
 119     TRACE("(%p)->(%p)\n", This, pctinfo);
 120
 121     *pctinfo = 1;
 122
 123     return S_OK;
 124 }
 125
 126 static HRESULT WINAPI xmlnodelist_GetTypeInfo(
 127     IXMLDOMNodeList *iface,
 128     UINT iTInfo,
 129     LCID lcid,
 130     ITypeInfo** ppTInfo )
 131 {
 132     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
 133     HRESULT hr;
 134
 135     TRACE("(%p)->(%u %u %p)\n", This, iTInfo, lcid, ppTInfo);
 136
 137     hr = get_typeinfo(IXMLDOMNodeList_tid, ppTInfo);
 138
 139     return hr;
 140 }
 141
 142 static HRESULT WINAPI xmlnodelist_GetIDsOfNames(
 143     IXMLDOMNodeList *iface,
 144     REFIID riid,
 145     LPOLESTR* rgszNames,
 146     UINT cNames,
 147     LCID lcid,
 148     DISPID* rgDispId )
 149 {
 150     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
 151     ITypeInfo *typeinfo;
 152     HRESULT hr;
 153
 154     TRACE("(%p)->(%s %p %u %u %p)\n", This, debugstr_guid(riid), rgszNames, cNames,
 155           lcid, rgDispId);
 156
 157     if(!rgszNames || cNames == 0 || !rgDispId)
 158         return E_INVALIDARG;
 159
 160     hr = get_typeinfo(IXMLDOMNodeList_tid, &typeinfo);
 161     if(SUCCEEDED(hr))
 162     {
 163         hr = ITypeInfo_GetIDsOfNames(typeinfo, rgszNames, cNames, rgDispId);
 164         ITypeInfo_Release(typeinfo);
 165     }
 166
 167     return hr;
 168 }
 169
 170 static HRESULT WINAPI xmlnodelist_Invoke(
 171     IXMLDOMNodeList *iface,
 172     DISPID dispIdMember,
 173     REFIID riid,
 174     LCID lcid,
 175     WORD wFlags,
 176     DISPPARAMS* pDispParams,
 177     VARIANT* pVarResult,
 178     EXCEPINFO* pExcepInfo,
 179     UINT* puArgErr )
 180 {
 181     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
 182     ITypeInfo *typeinfo;
 183     HRESULT hr;
 184
 185     TRACE("(%p)->(%d %s %d %d %p %p %p %p)\n", This, dispIdMember, debugstr_guid(riid),
 186           lcid, wFlags, pDispParams, pVarResult, pExcepInfo, puArgErr);
 187
 188     hr = get_typeinfo(IXMLDOMNodeList_tid, &typeinfo);
 189     if(SUCCEEDED(hr))
 190     {
 191         hr = ITypeInfo_Invoke(typeinfo, &(This->lpVtbl), dispIdMember, wFlags, pDispParams,
 192                 pVarResult, pExcepInfo, puArgErr);
 193         ITypeInfo_Release(typeinfo);
 194     }
 195
 196     return hr;
 197 }
 198
 199 static HRESULT WINAPI xmlnodelist_get_item(
 200         IXMLDOMNodeList* iface,
 201         LONG index,
 202         IXMLDOMNode** listItem)
 203 {
 204     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
 205     xmlNodePtr curr;
 206     LONG nodeIndex = 0;
 207
 208     TRACE("(%p)->(%d %p)\n", This, index, listItem);
 209
 210     if(!listItem)
 211         return E_INVALIDARG;
 212
 213     *listItem = NULL;
 214
 215     if (index < 0)
 216         return S_FALSE;
 217
 218     curr = This->parent->children;
 219     while(curr)
 220     {
 221         if(nodeIndex++ == index) break;
 222         curr = curr->next;
 223     }
 224     if(!curr) return S_FALSE;
 225
 226     *listItem = create_node( curr );
 227
 228     return S_OK;
 229 }
 230
 231 static HRESULT WINAPI xmlnodelist_get_length(
 232         IXMLDOMNodeList* iface,
 233         LONG* listLength)
 234 {
 235
 236     xmlNodePtr curr;
 237     LONG nodeCount = 0;
 238
 239     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
 240
 241     TRACE("(%p)->(%p)\n", This, listLength);
 242
 243     if(!listLength)
 244         return E_INVALIDARG;
 245
 246     curr = This->parent->children;
 247     while (curr)
 248     {
 249         nodeCount++;
 250         curr = curr->next;
 251     }
 252
 253     *listLength = nodeCount;
 254     return S_OK;
 255 }
 256
 257 static HRESULT WINAPI xmlnodelist_nextNode(
 258         IXMLDOMNodeList* iface,
 259         IXMLDOMNode** nextItem)
 260 {
 261     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
 262
 263     TRACE("(%p)->(%p)\n", This, nextItem );
 264
 265     if(!nextItem)
 266         return E_INVALIDARG;
 267
 268     *nextItem = NULL;
 269
 270     if (!This->current)
 271         return S_FALSE;
 272
 273     *nextItem = create_node( This->current );
 274     This->current = This->current->next;
 275     return S_OK;
 276 }
 277
 278 static HRESULT WINAPI xmlnodelist_reset(
 279         IXMLDOMNodeList* iface)
 280 {
 281     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
 282
 283     TRACE("%p\n", This);
 284     This->current = This->parent->children;
 285     return S_OK;
 286 }
 287
 288 static HRESULT WINAPI xmlnodelist__newEnum(
 289         IXMLDOMNodeList* iface,
 290         IUnknown** ppUnk)
 291 {
 292     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
 293     FIXME("(%p)->(%p)\n", This, ppUnk);
 294     return E_NOTIMPL;
 295 }
 296
 297
 298 static const struct IXMLDOMNodeListVtbl xmlnodelist_vtbl =
 299 {
 300     xmlnodelist_QueryInterface,
 301     xmlnodelist_AddRef,
 302     xmlnodelist_Release,
 303     xmlnodelist_GetTypeInfoCount,
 304     xmlnodelist_GetTypeInfo,
 305     xmlnodelist_GetIDsOfNames,
 306     xmlnodelist_Invoke,
 307     xmlnodelist_get_item,
 308     xmlnodelist_get_length,
 309     xmlnodelist_nextNode,
 310     xmlnodelist_reset,
 311     xmlnodelist__newEnum,
 312 };
 313
 314 IXMLDOMNodeList* create_children_nodelist( xmlNodePtr node )
 315 {
 316     xmlnodelist *nodelist;
 317
 318     nodelist = heap_alloc( sizeof *nodelist );
 319     if ( !nodelist )
 320         return NULL;
 321
 322     nodelist->lpVtbl = &xmlnodelist_vtbl;
 323     nodelist->ref = 1;
 324     nodelist->parent = node;
 325     nodelist->current = node->children;
 326
 327     xmldoc_add_ref( node->doc );
 328
 329     return (IXMLDOMNodeList*) &nodelist->lpVtbl;
 330 }
 331
 332 #endif