dlls/msxml3/nodelist.c

   1 /*
   2  *    Node list implementation
   3  *
   4  * Copyright 2005 Mike McCormack
   5  *
   6  * iface 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  * iface 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  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 "winnls.h"
  30 #include "ole2.h"
  31 #include "ocidl.h"
  32 #include "msxml.h"
  33 #include "xmldom.h"
  34 #include "msxml.h"
  35
  36 #include "msxml_private.h"
  37
  38 #include "wine/debug.h"
  39
  40 WINE_DEFAULT_DEBUG_CHANNEL(msxml);
  41
  42 #ifdef HAVE_LIBXML2
  43
  44 #ifdef HAVE_LIBXSLT
  45
  46 #ifdef HAVE_LIBXSLT_PATTERN_H
  47 #include <libxslt/pattern.h>
  48 #endif
  49 #ifdef HAVE_LIBXSLT_TRANSFORM_H
  50 #include <libxslt/transform.h>
  51 #endif
  52
  53 struct xslt_info {
  54     xsltTransformContextPtr ctxt;
  55     xsltCompMatchPtr pattern;
  56     xsltStylesheetPtr sheet;
  57 };
  58
  59 static void xlst_info_init( struct xslt_info *info )
  60 {
  61     info->ctxt = NULL;
  62     info->pattern = NULL;
  63     info->sheet = NULL;
  64 }
  65
  66 static int create_xslt_parser( struct xslt_info *info, xmlNodePtr node, const xmlChar *str )
  67 {
  68     info->sheet = xsltNewStylesheet();
  69     if (!info->sheet)
  70         return 0;
  71
  72     info->ctxt = xsltNewTransformContext( info->sheet, node->doc );
  73     if (!info->ctxt)
  74         return 0;
  75
  76     info->pattern = xsltCompilePattern( str, node->doc,
  77                                         node, info->sheet, info->ctxt );
  78     if (!info->pattern)
  79         return 0;
  80     return 1;
  81 }
  82
  83 void free_xslt_info( struct xslt_info *info )
  84 {
  85     if (info->pattern)
  86         xsltFreeCompMatchList( info->pattern );
  87     if (info->sheet)
  88         xsltFreeStylesheet( info->sheet );
  89     if (info->ctxt)
  90         xsltFreeTransformContext( info->ctxt );
  91 }
  92
  93 static HRESULT xslt_next_match( struct xslt_info *info, xmlNodePtr *node )
  94 {
  95     if (!info->ctxt)
  96         return S_FALSE;
  97
  98     /* make sure that the current element matches the pattern */
  99     while ( *node )
 100     {
 101         int r;
 102
 103         r = xsltTestCompMatchList( info->ctxt, *node, info->pattern );
 104         if ( 1 == r )
 105         {
 106             TRACE("Matched %p (%s)\n", *node, (*node)->name );
 107             return S_OK;
 108         }
 109         if (r != 0)
 110         {
 111             ERR("Pattern match failed\n");
 112             return E_FAIL;
 113         }
 114         *node = (*node)->next;
 115     }
 116     return S_OK;
 117 }
 118
 119 #else
 120
 121 struct xslt_info {
 122     /* empty */
 123 };
 124
 125 static void xlst_info_init( struct xslt_info *info )
 126 {
 127 }
 128
 129 void free_xslt_info( struct xslt_info *info )
 130 {
 131 }
 132
 133 static int create_xslt_parser( struct xslt_info *info, xmlNodePtr node, const xmlChar *str )
 134 {
 135     MESSAGE("libxslt was missing at compile time\n");
 136     return 0;
 137 }
 138
 139 static HRESULT xslt_next_match( struct xslt_info *info, xmlNodePtr *node )
 140 {
 141     return S_FALSE;
 142 }
 143
 144 #endif
 145
 146 typedef struct _xmlnodelist
 147 {
 148     const struct IXMLDOMNodeListVtbl *lpVtbl;
 149     LONG ref;
 150     xmlNodePtr node;
 151     xmlNodePtr current;
 152     struct xslt_info xinfo;
 153 } xmlnodelist;
 154
 155 static inline xmlnodelist *impl_from_IXMLDOMNodeList( IXMLDOMNodeList *iface )
 156 {
 157     return (xmlnodelist *)((char*)iface - FIELD_OFFSET(xmlnodelist, lpVtbl));
 158 }
 159
 160 static HRESULT WINAPI xmlnodelist_QueryInterface(
 161     IXMLDOMNodeList *iface,
 162     REFIID riid,
 163     void** ppvObject )
 164 {
 165     TRACE("%p %p %p\n", iface, debugstr_guid(riid), ppvObject);
 166
 167     if ( IsEqualGUID( riid, &IID_IUnknown ) ||
 168          IsEqualGUID( riid, &IID_IDispatch ) ||
 169          IsEqualGUID( riid, &IID_IXMLDOMNodeList ) )
 170     {
 171         *ppvObject = iface;
 172     }
 173     else
 174         return E_NOINTERFACE;
 175
 176     IXMLDOMNodeList_AddRef( iface );
 177
 178     return S_OK;
 179 }
 180
 181 static ULONG WINAPI xmlnodelist_AddRef(
 182     IXMLDOMNodeList *iface )
 183 {
 184     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
 185     return InterlockedIncrement( &This->ref );
 186 }
 187
 188 static ULONG WINAPI xmlnodelist_Release(
 189     IXMLDOMNodeList *iface )
 190 {
 191     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
 192     ULONG ref;
 193
 194     ref = InterlockedDecrement( &This->ref );
 195     if ( ref == 0 )
 196     {
 197         free_xslt_info( &This->xinfo );
 198         HeapFree( GetProcessHeap(), 0, This );
 199     }
 200
 201     return ref;
 202 }
 203
 204 static HRESULT WINAPI xmlnodelist_GetTypeInfoCount(
 205     IXMLDOMNodeList *iface,
 206     UINT* pctinfo )
 207 {
 208     FIXME("\n");
 209     return E_NOTIMPL;
 210 }
 211
 212 static HRESULT WINAPI xmlnodelist_GetTypeInfo(
 213     IXMLDOMNodeList *iface,
 214     UINT iTInfo,
 215     LCID lcid,
 216     ITypeInfo** ppTInfo )
 217 {
 218     FIXME("\n");
 219     return E_NOTIMPL;
 220 }
 221
 222 static HRESULT WINAPI xmlnodelist_GetIDsOfNames(
 223     IXMLDOMNodeList *iface,
 224     REFIID riid,
 225     LPOLESTR* rgszNames,
 226     UINT cNames,
 227     LCID lcid,
 228     DISPID* rgDispId )
 229 {
 230     FIXME("\n");
 231     return E_NOTIMPL;
 232 }
 233
 234 static HRESULT WINAPI xmlnodelist_Invoke(
 235     IXMLDOMNodeList *iface,
 236     DISPID dispIdMember,
 237     REFIID riid,
 238     LCID lcid,
 239     WORD wFlags,
 240     DISPPARAMS* pDispParams,
 241     VARIANT* pVarResult,
 242     EXCEPINFO* pExcepInfo,
 243     UINT* puArgErr )
 244 {
 245     FIXME("\n");
 246     return E_NOTIMPL;
 247 }
 248
 249 static HRESULT WINAPI xmlnodelist_get_item(
 250         IXMLDOMNodeList* iface,
 251         long index,
 252         IXMLDOMNode** listItem)
 253 {
 254     FIXME("\n");
 255     return E_NOTIMPL;
 256 }
 257
 258 static HRESULT WINAPI xmlnodelist_get_length(
 259         IXMLDOMNodeList* iface,
 260         long* listLength)
 261 {
 262     FIXME("\n");
 263     return E_NOTIMPL;
 264 }
 265
 266 static HRESULT WINAPI xmlnodelist_nextNode(
 267         IXMLDOMNodeList* iface,
 268         IXMLDOMNode** nextItem)
 269 {
 270     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
 271     HRESULT r;
 272
 273     TRACE("%p %p\n", This, nextItem );
 274
 275     r = xslt_next_match( &This->xinfo, &This->current );
 276     if (FAILED(r) )
 277         return r;
 278
 279     if (!This->current)
 280         return S_FALSE;
 281
 282     *nextItem = create_node( This->current );
 283     This->current = This->current->next;
 284     return S_OK;
 285 }
 286
 287 static HRESULT WINAPI xmlnodelist_reset(
 288         IXMLDOMNodeList* iface)
 289 {
 290     xmlnodelist *This = impl_from_IXMLDOMNodeList( iface );
 291
 292     TRACE("%p\n", This);
 293     This->current = This->node;
 294     return S_OK;
 295 }
 296
 297 static HRESULT WINAPI xmlnodelist__newEnum(
 298         IXMLDOMNodeList* iface,
 299         IUnknown** ppUnk)
 300 {
 301     FIXME("\n");
 302     return E_NOTIMPL;
 303 }
 304
 305
 306 static const struct IXMLDOMNodeListVtbl xmlnodelist_vtbl =
 307 {
 308     xmlnodelist_QueryInterface,
 309     xmlnodelist_AddRef,
 310     xmlnodelist_Release,
 311     xmlnodelist_GetTypeInfoCount,
 312     xmlnodelist_GetTypeInfo,
 313     xmlnodelist_GetIDsOfNames,
 314     xmlnodelist_Invoke,
 315     xmlnodelist_get_item,
 316     xmlnodelist_get_length,
 317     xmlnodelist_nextNode,
 318     xmlnodelist_reset,
 319     xmlnodelist__newEnum,
 320 };
 321
 322 static xmlnodelist *new_nodelist( xmlNodePtr node )
 323 {
 324     xmlnodelist *nodelist;
 325
 326     nodelist = HeapAlloc( GetProcessHeap(), 0, sizeof *nodelist );
 327     if ( !nodelist )
 328         return NULL;
 329
 330     nodelist->lpVtbl = &xmlnodelist_vtbl;
 331     nodelist->ref = 1;
 332     nodelist->node = node;
 333     nodelist->current = node;
 334     xlst_info_init( &nodelist->xinfo );
 335
 336     return nodelist;
 337 }
 338
 339 IXMLDOMNodeList* create_nodelist( xmlNodePtr node )
 340 {
 341     xmlnodelist *nodelist = new_nodelist( node );
 342     if (!node)
 343         return NULL;
 344     return (IXMLDOMNodeList*) &nodelist->lpVtbl;
 345 }
 346
 347 IXMLDOMNodeList* create_filtered_nodelist( xmlNodePtr node, const xmlChar *str )
 348 {
 349     xmlnodelist *This = new_nodelist( node );
 350
 351     if (create_xslt_parser( &This->xinfo, node, str ))
 352         return (IXMLDOMNodeList*) &This->lpVtbl;
 353
 354     IXMLDOMNodeList_Release( (IXMLDOMNodeList*) &This->lpVtbl );
 355     return NULL;
 356 }
 357
 358 #endif