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
  37 #include "msxml_private.h"
  38
  39 #include "wine/debug.h"
  40
  41 /* This file implements the object returned by childNodes property. Note that this is
  42  * not the IXMLDOMNodeList returned by XPath querites - it's implemented in queryresult.c.
  43  * They are different because the list returned by childNodes:
  44  *  - is "live" - changes to the XML tree are automatically reflected in the list
  45  *  - doesn't supports IXMLDOMSelection
  46  *  - note that an attribute node have a text child in DOM but not in the XPath data model
  47  *    thus the child is inaccessible by an XPath query
  48  */
  49
  50 WINE_DEFAULT_DEBUG_CHANNEL(msxml);
  51
  52 #ifdef HAVE_LIBXML2
  53
  54 typedef struct _xmlnodelist
  55 {
  56     IXMLDOMNodeList IXMLDOMNodeList_iface;
  57     LONG ref;
  58     xmlNodePtr parent;
  59     xmlNodePtr current;
  60 } xmlnodelist;
  61
  62 static inline xmlnodelist *impl_from_IXMLDOMNodeList( IXMLDOMNodeList *iface )
  63 {
  64     return CONTAINING_RECORD(iface, xmlnodelist, IXMLDOMNodeList_iface);
  65 }
  66
  67 static HRESULT WINAPI xmlnodelist_QueryInterface(
  68     IXMLDOMNodeList *iface,
  69     REFIID riid,
  70     void** ppvObject )
  71 {
  72     TRACE("(%p)->(%s %p)\n", iface, debugstr_guid(riid), ppvObject);
  73
  74     if ( IsEqualGUID( riid, &IID_IUnknown ) ||
  75          IsEqualGUID( riid, &IID_IDispatch ) ||
  76          IsEqualGUID( riid, &IID_IXMLDOMNodeList ) )
  77     {
  78         *ppvObject = iface;
  79     }
  80     else
  81     {
  82         TRACE("interface %s not implemented\n", debugstr_guid(riid));
  83         *ppvObject = NULL;
  84         return E_NOINTERFACE;
  85     }
  86
  87     IXMLDOMNodeList_AddRef( iface );
  88
  89     return S_OK;
  90 }
  91
  92 static ULONG WINAPI xmlnodelist_AddRef(
  93     IXMLDOMNodeList *iface )
  94 {
  95     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
  96     ULONG ref = InterlockedIncrement( &This->ref );
  97     TRACE("(%p)->(%d)\n", This, ref);
  98     return ref;
  99 }
 100
 101 static ULONG WINAPI xmlnodelist_Release(
 102     IXMLDOMNodeList *iface )
 103 {
 104     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
 105     ULONG ref = InterlockedDecrement( &This->ref );
 106
 107     TRACE("(%p)->(%d)\n", This, ref);
 108     if ( ref == 0 )
 109     {
 110         xmldoc_release( This->parent->doc );
 111         heap_free( This );
 112     }
 113
 114     return ref;
 115 }
 116
 117 static HRESULT WINAPI xmlnodelist_GetTypeInfoCount(
 118     IXMLDOMNodeList *iface,
 119     UINT* pctinfo )
 120 {
 121     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
 122
 123     TRACE("(%p)->(%p)\n", This, pctinfo);
 124
 125     *pctinfo = 1;
 126
 127     return S_OK;
 128 }
 129
 130 static HRESULT WINAPI xmlnodelist_GetTypeInfo(
 131     IXMLDOMNodeList *iface,
 132     UINT iTInfo,
 133     LCID lcid,
 134     ITypeInfo** ppTInfo )
 135 {
 136     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
 137     HRESULT hr;
 138
 139     TRACE("(%p)->(%u %u %p)\n", This, iTInfo, lcid, ppTInfo);
 140
 141     hr = get_typeinfo(IXMLDOMNodeList_tid, ppTInfo);
 142
 143     return hr;
 144 }
 145
 146 static HRESULT WINAPI xmlnodelist_GetIDsOfNames(
 147     IXMLDOMNodeList *iface,
 148     REFIID riid,
 149     LPOLESTR* rgszNames,
 150     UINT cNames,
 151     LCID lcid,
 152     DISPID* rgDispId )
 153 {
 154     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
 155     ITypeInfo *typeinfo;
 156     HRESULT hr;
 157
 158     TRACE("(%p)->(%s %p %u %u %p)\n", This, debugstr_guid(riid), rgszNames, cNames,
 159           lcid, rgDispId);
 160
 161     if(!rgszNames || cNames == 0 || !rgDispId)
 162         return E_INVALIDARG;
 163
 164     hr = get_typeinfo(IXMLDOMNodeList_tid, &typeinfo);
 165     if(SUCCEEDED(hr))
 166     {
 167         hr = ITypeInfo_GetIDsOfNames(typeinfo, rgszNames, cNames, rgDispId);
 168         ITypeInfo_Release(typeinfo);
 169     }
 170
 171     return hr;
 172 }
 173
 174 static HRESULT WINAPI xmlnodelist_Invoke(
 175     IXMLDOMNodeList *iface,
 176     DISPID dispIdMember,
 177     REFIID riid,
 178     LCID lcid,
 179     WORD wFlags,
 180     DISPPARAMS* pDispParams,
 181     VARIANT* pVarResult,
 182     EXCEPINFO* pExcepInfo,
 183     UINT* puArgErr )
 184 {
 185     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
 186     ITypeInfo *typeinfo;
 187     HRESULT hr;
 188
 189     TRACE("(%p)->(%d %s %d %d %p %p %p %p)\n", This, dispIdMember, debugstr_guid(riid),
 190           lcid, wFlags, pDispParams, pVarResult, pExcepInfo, puArgErr);
 191
 192     hr = get_typeinfo(IXMLDOMNodeList_tid, &typeinfo);
 193     if(SUCCEEDED(hr))
 194     {
 195         hr = ITypeInfo_Invoke(typeinfo, &This->IXMLDOMNodeList_iface, dispIdMember, wFlags,
 196                 pDispParams, pVarResult, pExcepInfo, puArgErr);
 197         ITypeInfo_Release(typeinfo);
 198     }
 199
 200     return hr;
 201 }
 202
 203 static HRESULT WINAPI xmlnodelist_get_item(
 204         IXMLDOMNodeList* iface,
 205         LONG index,
 206         IXMLDOMNode** listItem)
 207 {
 208     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
 209     xmlNodePtr curr;
 210     LONG nodeIndex = 0;
 211
 212     TRACE("(%p)->(%d %p)\n", This, index, listItem);
 213
 214     if(!listItem)
 215         return E_INVALIDARG;
 216
 217     *listItem = NULL;
 218
 219     if (index < 0)
 220         return S_FALSE;
 221
 222     curr = This->parent->children;
 223     while(curr)
 224     {
 225         if(nodeIndex++ == index) break;
 226         curr = curr->next;
 227     }
 228     if(!curr) return S_FALSE;
 229
 230     *listItem = create_node( curr );
 231
 232     return S_OK;
 233 }
 234
 235 static HRESULT WINAPI xmlnodelist_get_length(
 236         IXMLDOMNodeList* iface,
 237         LONG* listLength)
 238 {
 239
 240     xmlNodePtr curr;
 241     LONG nodeCount = 0;
 242
 243     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
 244
 245     TRACE("(%p)->(%p)\n", This, listLength);
 246
 247     if(!listLength)
 248         return E_INVALIDARG;
 249
 250     curr = This->parent->children;
 251     while (curr)
 252     {
 253         nodeCount++;
 254         curr = curr->next;
 255     }
 256
 257     *listLength = nodeCount;
 258     return S_OK;
 259 }
 260
 261 static HRESULT WINAPI xmlnodelist_nextNode(
 262         IXMLDOMNodeList* iface,
 263         IXMLDOMNode** nextItem)
 264 {
 265     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
 266
 267     TRACE("(%p)->(%p)\n", This, nextItem );
 268
 269     if(!nextItem)
 270         return E_INVALIDARG;
 271
 272     *nextItem = NULL;
 273
 274     if (!This->current)
 275         return S_FALSE;
 276
 277     *nextItem = create_node( This->current );
 278     This->current = This->current->next;
 279     return S_OK;
 280 }
 281
 282 static HRESULT WINAPI xmlnodelist_reset(
 283         IXMLDOMNodeList* iface)
 284 {
 285     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
 286
 287     TRACE("%p\n", This);
 288     This->current = This->parent->children;
 289     return S_OK;
 290 }
 291
 292 static HRESULT WINAPI xmlnodelist__newEnum(
 293         IXMLDOMNodeList* iface,
 294         IUnknown** ppUnk)
 295 {
 296     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
 297     FIXME("(%p)->(%p)\n", This, ppUnk);
 298     return E_NOTIMPL;
 299 }
 300
 301
 302 static const struct IXMLDOMNodeListVtbl xmlnodelist_vtbl =
 303 {
 304     xmlnodelist_QueryInterface,
 305     xmlnodelist_AddRef,
 306     xmlnodelist_Release,
 307     xmlnodelist_GetTypeInfoCount,
 308     xmlnodelist_GetTypeInfo,
 309     xmlnodelist_GetIDsOfNames,
 310     xmlnodelist_Invoke,
 311     xmlnodelist_get_item,
 312     xmlnodelist_get_length,
 313     xmlnodelist_nextNode,
 314     xmlnodelist_reset,
 315     xmlnodelist__newEnum,
 316 };
 317
 318 IXMLDOMNodeList* create_children_nodelist( xmlNodePtr node )
 319 {
 320     xmlnodelist *nodelist;
 321
 322     nodelist = heap_alloc( sizeof *nodelist );
 323     if ( !nodelist )
 324         return NULL;
 325
 326     nodelist->IXMLDOMNodeList_iface.lpVtbl = &xmlnodelist_vtbl;
 327     nodelist->ref = 1;
 328     nodelist->parent = node;
 329     nodelist->current = node->children;
 330
 331     xmldoc_add_ref( node->doc );
 332
 333     return &nodelist->IXMLDOMNodeList_iface;
 334 }
 335
 336 #endif