dlls/mshtml/loadopts.c

   1 /*
   2  * Copyright 2006 Jacek Caban for CodeWeavers
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 #include "config.h"
  20
  21 #include <stdarg.h>
  22 #include <stdio.h>
  23
  24 #define COBJMACROS
  25
  26 #include "windef.h"
  27 #include "winbase.h"
  28 #include "winuser.h"
  29 #include "ole2.h"
  30 #include "optary.h"
  31
  32 #include "wine/debug.h"
  33
  34 #include "mshtml_private.h"
  35
  36 WINE_DEFAULT_DEBUG_CHANNEL(mshtml);
  37
  38 typedef struct load_opt {
  39     DWORD option;
  40     PVOID buffer;
  41     DWORD size;
  42
  43     struct load_opt *next;
  44 } load_opt;
  45
  46 typedef struct {
  47     IHtmlLoadOptions IHtmlLoadOptions_iface;
  48
  49     LONG ref;
  50
  51     load_opt *opts;
  52 } HTMLLoadOptions;
  53
  54 static inline HTMLLoadOptions *impl_from_IHtmlLoadOptions(IHtmlLoadOptions *iface)
  55 {
  56     return CONTAINING_RECORD(iface, HTMLLoadOptions, IHtmlLoadOptions_iface);
  57 }
  58
  59 static HRESULT WINAPI HtmlLoadOptions_QueryInterface(IHtmlLoadOptions *iface,
  60         REFIID riid, void **ppv)
  61 {
  62     HTMLLoadOptions *This = impl_from_IHtmlLoadOptions(iface);
  63
  64     TRACE("(%p)->(%s %p)\n", This, debugstr_mshtml_guid(riid), ppv);
  65
  66     if(IsEqualGUID(&IID_IUnknown, riid)) {
  67         *ppv = &This->IHtmlLoadOptions_iface;
  68     }else if(IsEqualGUID(&IID_IOptionArray, riid)) {
  69         *ppv = &This->IHtmlLoadOptions_iface;
  70     }else if(IsEqualGUID(&IID_IHtmlLoadOptions, riid)) {
  71         *ppv = &This->IHtmlLoadOptions_iface;
  72     }else {
  73         *ppv = NULL;
  74         WARN("(%p)->(%s %p)\n", This, debugstr_mshtml_guid(riid), ppv);
  75         return E_NOINTERFACE;
  76     }
  77
  78     IUnknown_AddRef((IUnknown*)*ppv);
  79     return S_OK;
  80 }
  81
  82 static ULONG WINAPI HtmlLoadOptions_AddRef(IHtmlLoadOptions *iface)
  83 {
  84     HTMLLoadOptions *This = impl_from_IHtmlLoadOptions(iface);
  85     LONG ref = InterlockedIncrement(&This->ref);
  86
  87     TRACE("(%p) ref=%d\n", This, ref);
  88
  89     return ref;
  90 }
  91
  92 static ULONG WINAPI HtmlLoadOptions_Release(IHtmlLoadOptions *iface)
  93 {
  94     HTMLLoadOptions *This = impl_from_IHtmlLoadOptions(iface);
  95     LONG ref = InterlockedDecrement(&This->ref);
  96
  97     TRACE("(%p) ref=%d\n", This, ref);
  98
  99     if(!ref) {
 100         load_opt *iter = This->opts, *last;
 101
 102         while(iter) {
 103             last = iter;
 104             iter = iter->next;
 105
 106             heap_free(last->buffer);
 107             heap_free(last);
 108         }
 109
 110         heap_free(This);
 111     }
 112
 113     return ref;
 114 }
 115
 116 static HRESULT WINAPI HtmlLoadOptions_QueryOption(IHtmlLoadOptions *iface, DWORD dwOption,
 117         LPVOID pBuffer, ULONG *pcbBuf)
 118 {
 119     HTMLLoadOptions *This = impl_from_IHtmlLoadOptions(iface);
 120     load_opt *iter;
 121
 122     TRACE("(%p)->(%d %p %p)\n", This, dwOption, pBuffer, pcbBuf);
 123
 124     for(iter = This->opts; iter; iter = iter->next) {
 125         if(iter->option == dwOption)
 126             break;
 127     }
 128
 129     if(!iter) {
 130         *pcbBuf = 0;
 131         return S_OK;
 132     }
 133
 134     if(*pcbBuf < iter->size) {
 135         *pcbBuf = iter->size;
 136         return E_FAIL;
 137     }
 138
 139     memcpy(pBuffer, iter->buffer, iter->size);
 140     *pcbBuf = iter->size;
 141
 142     return S_OK;
 143 }
 144
 145 static HRESULT WINAPI HtmlLoadOptions_SetOption(IHtmlLoadOptions *iface, DWORD dwOption,
 146         LPVOID pBuffer, ULONG cbBuf)
 147 {
 148     HTMLLoadOptions *This = impl_from_IHtmlLoadOptions(iface);
 149     load_opt *iter = NULL;
 150
 151     TRACE("(%p)->(%d %p %d)\n", This, dwOption, pBuffer, cbBuf);
 152
 153     for(iter = This->opts; iter; iter = iter->next) {
 154         if(iter->option == dwOption)
 155             break;
 156     }
 157
 158     if(!iter) {
 159         iter = heap_alloc(sizeof(load_opt));
 160         iter->next = This->opts;
 161         This->opts = iter;
 162
 163         iter->option = dwOption;
 164     }else {
 165         heap_free(iter->buffer);
 166     }
 167
 168     if(!cbBuf) {
 169         iter->buffer = NULL;
 170         iter->size = 0;
 171
 172         return S_OK;
 173     }
 174
 175     iter->size = cbBuf;
 176     iter->buffer = heap_alloc(cbBuf);
 177     memcpy(iter->buffer, pBuffer, iter->size);
 178
 179     return S_OK;
 180 }
 181
 182 static const IHtmlLoadOptionsVtbl HtmlLoadOptionsVtbl = {
 183     HtmlLoadOptions_QueryInterface,
 184     HtmlLoadOptions_AddRef,
 185     HtmlLoadOptions_Release,
 186     HtmlLoadOptions_QueryOption,
 187     HtmlLoadOptions_SetOption
 188 };
 189
 190 HRESULT HTMLLoadOptions_Create(IUnknown *pUnkOuter, REFIID riid, void** ppv)
 191 {
 192     HTMLLoadOptions *ret;
 193     HRESULT hres;
 194
 195     TRACE("(%p %s %p)\n", pUnkOuter, debugstr_mshtml_guid(riid), ppv);
 196
 197     ret = heap_alloc(sizeof(HTMLLoadOptions));
 198     if(!ret)
 199         return E_OUTOFMEMORY;
 200
 201     ret->IHtmlLoadOptions_iface.lpVtbl = &HtmlLoadOptionsVtbl;
 202     ret->ref = 1;
 203     ret->opts = NULL;
 204
 205     hres = IHtmlLoadOptions_QueryInterface(&ret->IHtmlLoadOptions_iface, riid, ppv);
 206     IHtmlLoadOptions_Release(&ret->IHtmlLoadOptions_iface);
 207     return hres;
 208 }