reactos/dll/win32/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     const IHtmlLoadOptionsVtbl *lpHtmlLoadOptionsVtbl;
  48
  49     LONG ref;
  50
  51     load_opt *opts;
  52 } HTMLLoadOptions;
  53
  54 #define LOADOPTS(x)  ((IHtmlLoadOptions*) &(x)->lpHtmlLoadOptionsVtbl)
  55
  56 #define LOADOPTS_THIS(iface) DEFINE_THIS(HTMLLoadOptions, HtmlLoadOptions, iface)
  57
  58 static HRESULT WINAPI HtmlLoadOptions_QueryInterface(IHtmlLoadOptions *iface,
  59         REFIID riid, void **ppv)
  60 {
  61     HTMLLoadOptions *This = LOADOPTS_THIS(iface);
  62
  63     *ppv = NULL;
  64
  65     if(IsEqualGUID(&IID_IUnknown, riid)) {
  66         TRACE("(%p)->(IID_IUnknown %p)\n", This, ppv);
  67         *ppv = LOADOPTS(This);
  68     }else if(IsEqualGUID(&IID_IOptionArray, riid)) {
  69         TRACE("(%p)->(IID_IOptionArray %p)\n", This, ppv);
  70         *ppv = LOADOPTS(This);
  71     }else if(IsEqualGUID(&IID_IHtmlLoadOptions, riid)) {
  72         TRACE("(%p)->(IID_IHtmlLoadOptions %p)\n", This, ppv);
  73         *ppv = LOADOPTS(This);
  74     }
  75
  76     if(*ppv) {
  77         IHtmlLoadOptions_AddRef(LOADOPTS(This));
  78         return S_OK;
  79     }
  80
  81     WARN("(%p)->(%s %p)\n", This, debugstr_guid(riid), ppv);
  82     return E_NOINTERFACE;
  83 }
  84
  85 static ULONG WINAPI HtmlLoadOptions_AddRef(IHtmlLoadOptions *iface)
  86 {
  87     HTMLLoadOptions *This = LOADOPTS_THIS(iface);
  88     LONG ref = InterlockedIncrement(&This->ref);
  89
  90     TRACE("(%p) ref=%d\n", This, ref);
  91
  92     return ref;
  93 }
  94
  95 static ULONG WINAPI HtmlLoadOptions_Release(IHtmlLoadOptions *iface)
  96 {
  97     HTMLLoadOptions *This = LOADOPTS_THIS(iface);
  98     LONG ref = InterlockedDecrement(&This->ref);
  99
 100     TRACE("(%p) ref=%d\n", This, ref);
 101
 102     if(!ref) {
 103         load_opt *iter = This->opts, *last;
 104
 105         while(iter) {
 106             last = iter;
 107             iter = iter->next;
 108
 109             heap_free(last->buffer);
 110             heap_free(last);
 111         }
 112
 113         heap_free(This);
 114     }
 115
 116     return ref;
 117 }
 118
 119 static HRESULT WINAPI HtmlLoadOptions_QueryOption(IHtmlLoadOptions *iface, DWORD dwOption,
 120         LPVOID pBuffer, ULONG *pcbBuf)
 121 {
 122     HTMLLoadOptions *This = LOADOPTS_THIS(iface);
 123     load_opt *iter;
 124
 125     TRACE("(%p)->(%d %p %p)\n", This, dwOption, pBuffer, pcbBuf);
 126
 127     for(iter = This->opts; iter; iter = iter->next) {
 128         if(iter->option == dwOption)
 129             break;
 130     }
 131
 132     if(!iter) {
 133         *pcbBuf = 0;
 134         return S_OK;
 135     }
 136
 137     if(*pcbBuf < iter->size) {
 138         *pcbBuf = iter->size;
 139         return E_FAIL;
 140     }
 141
 142     memcpy(pBuffer, iter->buffer, iter->size);
 143     *pcbBuf = iter->size;
 144
 145     return S_OK;
 146 }
 147
 148 static HRESULT WINAPI HtmlLoadOptions_SetOption(IHtmlLoadOptions *iface, DWORD dwOption,
 149         LPVOID pBuffer, ULONG cbBuf)
 150 {
 151     HTMLLoadOptions *This = LOADOPTS_THIS(iface);
 152     load_opt *iter = NULL;
 153
 154     TRACE("(%p)->(%d %p %d)\n", This, dwOption, pBuffer, cbBuf);
 155
 156     for(iter = This->opts; iter; iter = iter->next) {
 157         if(iter->option == dwOption)
 158             break;
 159     }
 160
 161     if(!iter) {
 162         iter = heap_alloc(sizeof(load_opt));
 163         iter->next = This->opts;
 164         This->opts = iter;
 165
 166         iter->option = dwOption;
 167     }else {
 168         heap_free(iter->buffer);
 169     }
 170
 171     if(!cbBuf) {
 172         iter->buffer = NULL;
 173         iter->size = 0;
 174
 175         return S_OK;
 176     }
 177
 178     iter->size = cbBuf;
 179     iter->buffer = heap_alloc(cbBuf);
 180     memcpy(iter->buffer, pBuffer, iter->size);
 181
 182     return S_OK;
 183 }
 184
 185 #undef LOADOPTS_THIS
 186
 187 static const IHtmlLoadOptionsVtbl HtmlLoadOptionsVtbl = {
 188     HtmlLoadOptions_QueryInterface,
 189     HtmlLoadOptions_AddRef,
 190     HtmlLoadOptions_Release,
 191     HtmlLoadOptions_QueryOption,
 192     HtmlLoadOptions_SetOption
 193 };
 194
 195 HRESULT HTMLLoadOptions_Create(IUnknown *pUnkOuter, REFIID riid, void** ppv)
 196 {
 197     HTMLLoadOptions *ret;
 198     HRESULT hres;
 199
 200     TRACE("(%p %s %p)\n", pUnkOuter, debugstr_guid(riid), ppv);
 201
 202     ret = heap_alloc(sizeof(HTMLLoadOptions));
 203
 204     ret->lpHtmlLoadOptionsVtbl = &HtmlLoadOptionsVtbl;
 205     ret->ref = 1;
 206     ret->opts = NULL;
 207
 208     hres = IHtmlLoadOptions_QueryInterface(LOADOPTS(ret), riid, ppv);
 209     IHtmlLoadOptions_Release(LOADOPTS(ret));
 210
 211     return hres;
 212 }