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 <stdarg.h>
  20 #include <stdio.h>
  21
  22 #define COBJMACROS
  23
  24 #include "windef.h"
  25 #include "winbase.h"
  26 #include "winuser.h"
  27 #include "ole2.h"
  28 #include "optary.h"
  29
  30 #include "wine/debug.h"
  31
  32 #include "mshtml_private.h"
  33
  34 WINE_DEFAULT_DEBUG_CHANNEL(mshtml);
  35
  36 typedef struct load_opt {
  37     DWORD option;
  38     PVOID buffer;
  39     DWORD size;
  40
  41     struct load_opt *next;
  42 } load_opt;
  43
  44 typedef struct {
  45     IHtmlLoadOptions IHtmlLoadOptions_iface;
  46
  47     LONG ref;
  48
  49     load_opt *opts;
  50 } HTMLLoadOptions;
  51
  52 static inline HTMLLoadOptions *impl_from_IHtmlLoadOptions(IHtmlLoadOptions *iface)
  53 {
  54     return CONTAINING_RECORD(iface, HTMLLoadOptions, IHtmlLoadOptions_iface);
  55 }
  56
  57 static HRESULT WINAPI HtmlLoadOptions_QueryInterface(IHtmlLoadOptions *iface,
  58         REFIID riid, void **ppv)
  59 {
  60     HTMLLoadOptions *This = impl_from_IHtmlLoadOptions(iface);
  61
  62     TRACE("(%p)->(%s %p)\n", This, debugstr_mshtml_guid(riid), ppv);
  63
  64     if(IsEqualGUID(&IID_IUnknown, riid)) {
  65         *ppv = &This->IHtmlLoadOptions_iface;
  66     }else if(IsEqualGUID(&IID_IOptionArray, riid)) {
  67         *ppv = &This->IHtmlLoadOptions_iface;
  68     }else if(IsEqualGUID(&IID_IHtmlLoadOptions, riid)) {
  69         *ppv = &This->IHtmlLoadOptions_iface;
  70     }else {
  71         *ppv = NULL;
  72         WARN("(%p)->(%s %p)\n", This, debugstr_mshtml_guid(riid), ppv);
  73         return E_NOINTERFACE;
  74     }
  75
  76     IUnknown_AddRef((IUnknown*)*ppv);
  77     return S_OK;
  78 }
  79
  80 static ULONG WINAPI HtmlLoadOptions_AddRef(IHtmlLoadOptions *iface)
  81 {
  82     HTMLLoadOptions *This = impl_from_IHtmlLoadOptions(iface);
  83     LONG ref = InterlockedIncrement(&This->ref);
  84
  85     TRACE("(%p) ref=%d\n", This, ref);
  86
  87     return ref;
  88 }
  89
  90 static ULONG WINAPI HtmlLoadOptions_Release(IHtmlLoadOptions *iface)
  91 {
  92     HTMLLoadOptions *This = impl_from_IHtmlLoadOptions(iface);
  93     LONG ref = InterlockedDecrement(&This->ref);
  94
  95     TRACE("(%p) ref=%d\n", This, ref);
  96
  97     if(!ref) {
  98         load_opt *iter = This->opts, *last;
  99
 100         while(iter) {
 101             last = iter;
 102             iter = iter->next;
 103
 104             heap_free(last->buffer);
 105             heap_free(last);
 106         }
 107
 108         heap_free(This);
 109     }
 110
 111     return ref;
 112 }
 113
 114 static HRESULT WINAPI HtmlLoadOptions_QueryOption(IHtmlLoadOptions *iface, DWORD dwOption,
 115         LPVOID pBuffer, ULONG *pcbBuf)
 116 {
 117     HTMLLoadOptions *This = impl_from_IHtmlLoadOptions(iface);
 118     load_opt *iter;
 119
 120     TRACE("(%p)->(%d %p %p)\n", This, dwOption, pBuffer, pcbBuf);
 121
 122     for(iter = This->opts; iter; iter = iter->next) {
 123         if(iter->option == dwOption)
 124             break;
 125     }
 126
 127     if(!iter) {
 128         *pcbBuf = 0;
 129         return S_OK;
 130     }
 131
 132     if(*pcbBuf < iter->size) {
 133         *pcbBuf = iter->size;
 134         return E_FAIL;
 135     }
 136
 137     memcpy(pBuffer, iter->buffer, iter->size);
 138     *pcbBuf = iter->size;
 139
 140     return S_OK;
 141 }
 142
 143 static HRESULT WINAPI HtmlLoadOptions_SetOption(IHtmlLoadOptions *iface, DWORD dwOption,
 144         LPVOID pBuffer, ULONG cbBuf)
 145 {
 146     HTMLLoadOptions *This = impl_from_IHtmlLoadOptions(iface);
 147     load_opt *iter = NULL;
 148
 149     TRACE("(%p)->(%d %p %d)\n", This, dwOption, pBuffer, cbBuf);
 150
 151     for(iter = This->opts; iter; iter = iter->next) {
 152         if(iter->option == dwOption)
 153             break;
 154     }
 155
 156     if(!iter) {
 157         iter = heap_alloc(sizeof(load_opt));
 158         iter->next = This->opts;
 159         This->opts = iter;
 160
 161         iter->option = dwOption;
 162     }else {
 163         heap_free(iter->buffer);
 164     }
 165
 166     if(!cbBuf) {
 167         iter->buffer = NULL;
 168         iter->size = 0;
 169
 170         return S_OK;
 171     }
 172
 173     iter->size = cbBuf;
 174     iter->buffer = heap_alloc(cbBuf);
 175     memcpy(iter->buffer, pBuffer, iter->size);
 176
 177     return S_OK;
 178 }
 179
 180 static const IHtmlLoadOptionsVtbl HtmlLoadOptionsVtbl = {
 181     HtmlLoadOptions_QueryInterface,
 182     HtmlLoadOptions_AddRef,
 183     HtmlLoadOptions_Release,
 184     HtmlLoadOptions_QueryOption,
 185     HtmlLoadOptions_SetOption
 186 };
 187
 188 HRESULT HTMLLoadOptions_Create(IUnknown *pUnkOuter, REFIID riid, void** ppv)
 189 {
 190     HTMLLoadOptions *ret;
 191     HRESULT hres;
 192
 193     TRACE("(%p %s %p)\n", pUnkOuter, debugstr_mshtml_guid(riid), ppv);
 194
 195     ret = heap_alloc(sizeof(HTMLLoadOptions));
 196     if(!ret)
 197         return E_OUTOFMEMORY;
 198
 199     ret->IHtmlLoadOptions_iface.lpVtbl = &HtmlLoadOptionsVtbl;
 200     ret->ref = 1;
 201     ret->opts = NULL;
 202
 203     hres = IHtmlLoadOptions_QueryInterface(&ret->IHtmlLoadOptions_iface, riid, ppv);
 204     IHtmlLoadOptions_Release(&ret->IHtmlLoadOptions_iface);
 205     return hres;
 206 }