dlls/hhctrl.ocx/chm.c

   1 /*
   2  * CHM Utility API
   3  *
   4  * Copyright 2005 James Hawkins
   5  * Copyright 2007 Jacek Caban
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #include "hhctrl.h"
  23
  24 #include "winreg.h"
  25 #include "shlwapi.h"
  26 #include "wine/debug.h"
  27
  28 WINE_DEFAULT_DEBUG_CHANNEL(htmlhelp);
  29
  30 #define BLOCK_BITS 12
  31 #define BLOCK_SIZE (1 << BLOCK_BITS)
  32 #define BLOCK_MASK (BLOCK_SIZE-1)
  33
  34 /* Reads a string from the #STRINGS section in the CHM file */
  35 static LPCSTR GetChmString(CHMInfo *chm, DWORD offset)
  36 {
  37     LPCSTR str;
  38
  39     if(!chm->strings_stream)
  40         return NULL;
  41
  42     if(chm->strings_size <= (offset >> BLOCK_BITS)) {
  43         chm->strings_size = (offset >> BLOCK_BITS)+1;
  44         if(chm->strings)
  45             chm->strings = heap_realloc_zero(chm->strings,
  46                     chm->strings_size*sizeof(char*));
  47         else
  48             chm->strings = heap_alloc_zero(
  49                     chm->strings_size*sizeof(char*));
  50
  51     }
  52
  53     if(!chm->strings[offset >> BLOCK_BITS]) {
  54         LARGE_INTEGER pos;
  55         DWORD read;
  56         HRESULT hres;
  57
  58         pos.QuadPart = offset & ~BLOCK_MASK;
  59         hres = IStream_Seek(chm->strings_stream, pos, STREAM_SEEK_SET, NULL);
  60         if(FAILED(hres)) {
  61             WARN("Seek failed: %08x\n", hres);
  62             return NULL;
  63         }
  64
  65         chm->strings[offset >> BLOCK_BITS] = heap_alloc(BLOCK_SIZE);
  66
  67         hres = IStream_Read(chm->strings_stream, chm->strings[offset >> BLOCK_BITS],
  68                             BLOCK_SIZE, &read);
  69         if(FAILED(hres)) {
  70             WARN("Read failed: %08x\n", hres);
  71             heap_free(chm->strings[offset >> BLOCK_BITS]);
  72             chm->strings[offset >> BLOCK_BITS] = NULL;
  73             return NULL;
  74         }
  75     }
  76
  77     str = chm->strings[offset >> BLOCK_BITS] + (offset & BLOCK_MASK);
  78     TRACE("offset %#x => %s\n", offset, debugstr_a(str));
  79     return str;
  80 }
  81
  82 static BOOL ReadChmSystem(CHMInfo *chm)
  83 {
  84     IStream *stream;
  85     DWORD ver=0xdeadbeef, read, buf_size;
  86     char *buf;
  87     HRESULT hres;
  88
  89     struct {
  90         WORD code;
  91         WORD len;
  92     } entry;
  93
  94     static const WCHAR wszSYSTEM[] = {'#','S','Y','S','T','E','M',0};
  95
  96     hres = IStorage_OpenStream(chm->pStorage, wszSYSTEM, NULL, STGM_READ, 0, &stream);
  97     if(FAILED(hres)) {
  98         WARN("Could not open #SYSTEM stream: %08x\n", hres);
  99         return FALSE;
 100     }
 101
 102     IStream_Read(stream, &ver, sizeof(ver), &read);
 103     TRACE("version is %x\n", ver);
 104
 105     buf = heap_alloc(8*sizeof(DWORD));
 106     buf_size = 8*sizeof(DWORD);
 107
 108     while(1) {
 109         hres = IStream_Read(stream, &entry, sizeof(entry), &read);
 110         if(hres != S_OK)
 111             break;
 112
 113         if(entry.len > buf_size)
 114             buf = heap_realloc(buf, buf_size=entry.len);
 115
 116         hres = IStream_Read(stream, buf, entry.len, &read);
 117         if(hres != S_OK)
 118             break;
 119
 120         switch(entry.code) {
 121         case 0x0:
 122             TRACE("TOC is %s\n", debugstr_an(buf, entry.len));
 123             heap_free(chm->defToc);
 124             chm->defToc = strdupnAtoW(buf, entry.len);
 125             break;
 126         case 0x2:
 127             TRACE("Default topic is %s\n", debugstr_an(buf, entry.len));
 128             heap_free(chm->defTopic);
 129             chm->defTopic = strdupnAtoW(buf, entry.len);
 130             break;
 131         case 0x3:
 132             TRACE("Title is %s\n", debugstr_an(buf, entry.len));
 133             heap_free(chm->defTitle);
 134             chm->defTitle = strdupnAtoW(buf, entry.len);
 135             break;
 136         case 0x5:
 137             TRACE("Default window is %s\n", debugstr_an(buf, entry.len));
 138             break;
 139         case 0x6:
 140             TRACE("Compiled file is %s\n", debugstr_an(buf, entry.len));
 141             heap_free(chm->compiledFile);
 142             chm->compiledFile = strdupnAtoW(buf, entry.len);
 143             break;
 144         case 0x9:
 145             TRACE("Version is %s\n", debugstr_an(buf, entry.len));
 146             break;
 147         case 0xa:
 148             TRACE("Time is %08x\n", *(DWORD*)buf);
 149             break;
 150         case 0xc:
 151             TRACE("Number of info types: %d\n", *(DWORD*)buf);
 152             break;
 153         case 0xf:
 154             TRACE("Check sum: %x\n", *(DWORD*)buf);
 155             break;
 156         default:
 157             TRACE("unhandled code %x, size %x\n", entry.code, entry.len);
 158         }
 159     }
 160
 161     heap_free(buf);
 162     IStream_Release(stream);
 163
 164     return SUCCEEDED(hres);
 165 }
 166
 167 LPWSTR FindContextAlias(CHMInfo *chm, DWORD index)
 168 {
 169     IStream *ivb_stream;
 170     DWORD size, read, i;
 171     DWORD *buf;
 172     LPCSTR ret = NULL;
 173     HRESULT hres;
 174
 175     static const WCHAR wszIVB[] = {'#','I','V','B',0};
 176
 177     hres = IStorage_OpenStream(chm->pStorage, wszIVB, NULL, STGM_READ, 0, &ivb_stream);
 178     if(FAILED(hres)) {
 179         WARN("Could not open #IVB stream: %08x\n", hres);
 180         return NULL;
 181     }
 182
 183     hres = IStream_Read(ivb_stream, &size, sizeof(size), &read);
 184     if(FAILED(hres)) {
 185         WARN("Read failed: %08x\n", hres);
 186         IStream_Release(ivb_stream);
 187         return NULL;
 188     }
 189
 190     buf = heap_alloc(size);
 191     hres = IStream_Read(ivb_stream, buf, size, &read);
 192     IStream_Release(ivb_stream);
 193     if(FAILED(hres)) {
 194         WARN("Read failed: %08x\n", hres);
 195         heap_free(buf);
 196         return NULL;
 197     }
 198
 199     size /= 2*sizeof(DWORD);
 200
 201     for(i=0; i<size; i++) {
 202         if(buf[2*i] == index) {
 203             ret = GetChmString(chm, buf[2*i+1]);
 204             break;
 205         }
 206     }
 207
 208     heap_free(buf);
 209
 210     TRACE("returning %s\n", debugstr_a(ret));
 211     return strdupAtoW(ret);
 212 }
 213
 214 /*
 215  * Tests if the file <chmfile>.<ext> exists, used for loading Indicies, Table of Contents, etc.
 216  * when these files are not available from the HH_WINTYPE structure.
 217  */
 218 static WCHAR *FindHTMLHelpSetting(HHInfo *info, const WCHAR *extW)
 219 {
 220     static const WCHAR periodW[] = {'.',0};
 221     IStorage *pStorage = info->pCHMInfo->pStorage;
 222     IStream *pStream;
 223     WCHAR *filename;
 224     HRESULT hr;
 225
 226     filename = heap_alloc( (strlenW(info->pCHMInfo->compiledFile)
 227                             + strlenW(periodW) + strlenW(extW) + 1) * sizeof(WCHAR) );
 228     strcpyW(filename, info->pCHMInfo->compiledFile);
 229     strcatW(filename, periodW);
 230     strcatW(filename, extW);
 231     hr = IStorage_OpenStream(pStorage, filename, NULL, STGM_READ, 0, &pStream);
 232     if (FAILED(hr))
 233     {
 234         heap_free(filename);
 235         return strdupAtoW("");
 236     }
 237     IStream_Release(pStream);
 238     return filename;
 239 }
 240
 241 /* Loads the HH_WINTYPE data from the CHM file
 242  *
 243  * FIXME: There may be more than one window type in the file, so
 244  *        add the ability to choose a certain window type
 245  */
 246 BOOL LoadWinTypeFromCHM(HHInfo *info)
 247 {
 248     LARGE_INTEGER liOffset;
 249     IStorage *pStorage = info->pCHMInfo->pStorage;
 250     IStream *pStream;
 251     HRESULT hr;
 252     DWORD cbRead;
 253
 254     static const WCHAR toc_extW[] = {'h','h','c',0};
 255     static const WCHAR index_extW[] = {'h','h','k',0};
 256     static const WCHAR windowsW[] = {'#','W','I','N','D','O','W','S',0};
 257
 258     hr = IStorage_OpenStream(pStorage, windowsW, NULL, STGM_READ, 0, &pStream);
 259     if (FAILED(hr))
 260     {
 261         /* no defined window types so use (hopefully) sane defaults */
 262         static const WCHAR defaultwinW[] = {'d','e','f','a','u','l','t','w','i','n','\0'};
 263         static const WCHAR null[] = {0};
 264         memset((void*)&(info->WinType), 0, sizeof(info->WinType));
 265         info->WinType.cbStruct=sizeof(info->WinType);
 266         info->WinType.fUniCodeStrings=TRUE;
 267         info->WinType.pszType=strdupW(defaultwinW);
 268         info->WinType.pszToc = strdupW(info->pCHMInfo->defToc ? info->pCHMInfo->defToc : null);
 269         info->WinType.pszIndex = strdupW(null);
 270         info->WinType.fsValidMembers=0;
 271         info->WinType.fsWinProperties=HHWIN_PROP_TRI_PANE;
 272         info->WinType.pszCaption=strdupW(info->pCHMInfo->defTitle ? info->pCHMInfo->defTitle : null);
 273         info->WinType.dwStyles=WS_POPUP;
 274         info->WinType.dwExStyles=0;
 275         info->WinType.nShowState=SW_SHOW;
 276         info->WinType.pszFile=strdupW(info->pCHMInfo->defTopic ? info->pCHMInfo->defTopic : null);
 277         info->WinType.curNavType=HHWIN_NAVTYPE_TOC;
 278         return TRUE;
 279     }
 280
 281     /* jump past the #WINDOWS header */
 282     liOffset.QuadPart = sizeof(DWORD) * 2;
 283
 284     hr = IStream_Seek(pStream, liOffset, STREAM_SEEK_SET, NULL);
 285     if (FAILED(hr)) goto done;
 286
 287     /* read the HH_WINTYPE struct data */
 288     hr = IStream_Read(pStream, &info->WinType, sizeof(info->WinType), &cbRead);
 289     if (FAILED(hr)) goto done;
 290
 291     /* convert the #STRINGS offsets to actual strings */
 292
 293     info->WinType.pszType      = info->pszType     = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszType));
 294     info->WinType.pszCaption   = info->pszCaption  = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszCaption));
 295     info->WinType.pszFile      = info->pszFile     = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszFile));
 296     info->WinType.pszHome      = info->pszHome     = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszHome));
 297     info->WinType.pszJump1     = info->pszJump1    = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszJump1));
 298     info->WinType.pszJump2     = info->pszJump2    = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszJump2));
 299     info->WinType.pszUrlJump1  = info->pszUrlJump1 = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszUrlJump1));
 300     info->WinType.pszUrlJump2  = info->pszUrlJump2 = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszUrlJump2));
 301
 302     if (info->WinType.pszToc)
 303         info->WinType.pszToc   = info->pszToc      = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszToc));
 304     else
 305         info->WinType.pszToc   = info->pszToc      = FindHTMLHelpSetting(info, toc_extW);
 306     if (info->WinType.pszIndex)
 307         info->WinType.pszIndex = info->pszIndex    = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszIndex));
 308     else
 309         info->WinType.pszIndex = info->pszIndex    = FindHTMLHelpSetting(info, index_extW);
 310
 311     /* FIXME: pszCustomTabs is a list of multiple zero-terminated strings so ReadString won't
 312      * work in this case
 313      */
 314 #if 0
 315     info->WinType.pszCustomTabs = info->pszCustomTabs = CHM_ReadString(pChmInfo, (DWORD_PTR)info->WinType.pszCustomTabs);
 316 #endif
 317
 318 done:
 319     IStream_Release(pStream);
 320
 321     return SUCCEEDED(hr);
 322 }
 323
 324 LPCWSTR skip_schema(LPCWSTR url)
 325 {
 326     static const WCHAR its_schema[] = {'i','t','s',':'};
 327     static const WCHAR msits_schema[] = {'m','s','-','i','t','s',':'};
 328     static const WCHAR mk_schema[] = {'m','k',':','@','M','S','I','T','S','t','o','r','e',':'};
 329
 330     if(!strncmpiW(its_schema, url, sizeof(its_schema)/sizeof(WCHAR)))
 331         return url+sizeof(its_schema)/sizeof(WCHAR);
 332     if(!strncmpiW(msits_schema, url, sizeof(msits_schema)/sizeof(WCHAR)))
 333         return url+sizeof(msits_schema)/sizeof(WCHAR);
 334     if(!strncmpiW(mk_schema, url, sizeof(mk_schema)/sizeof(WCHAR)))
 335         return url+sizeof(mk_schema)/sizeof(WCHAR);
 336
 337     return url;
 338 }
 339
 340 void SetChmPath(ChmPath *file, LPCWSTR base_file, LPCWSTR path)
 341 {
 342     LPCWSTR ptr;
 343     static const WCHAR separatorW[] = {':',':',0};
 344
 345     path = skip_schema(path);
 346
 347     ptr = strstrW(path, separatorW);
 348     if(ptr) {
 349         WCHAR chm_file[MAX_PATH];
 350         WCHAR rel_path[MAX_PATH];
 351         WCHAR base_path[MAX_PATH];
 352         LPWSTR p;
 353
 354         strcpyW(base_path, base_file);
 355         p = strrchrW(base_path, '\\');
 356         if(p)
 357             *p = 0;
 358
 359         memcpy(rel_path, path, (ptr-path)*sizeof(WCHAR));
 360         rel_path[ptr-path] = 0;
 361
 362         PathCombineW(chm_file, base_path, rel_path);
 363
 364         file->chm_file = strdupW(chm_file);
 365         ptr += 2;
 366     }else {
 367         file->chm_file = strdupW(base_file);
 368         ptr = path;
 369     }
 370
 371     file->chm_index = strdupW(ptr);
 372
 373     TRACE("ChmFile = {%s %s}\n", debugstr_w(file->chm_file), debugstr_w(file->chm_index));
 374 }
 375
 376 IStream *GetChmStream(CHMInfo *info, LPCWSTR parent_chm, ChmPath *chm_file)
 377 {
 378     IStorage *storage;
 379     IStream *stream = NULL;
 380     HRESULT hres;
 381
 382     TRACE("%s (%s :: %s)\n", debugstr_w(parent_chm), debugstr_w(chm_file->chm_file),
 383           debugstr_w(chm_file->chm_index));
 384
 385     if(parent_chm || chm_file->chm_file) {
 386         hres = IITStorage_StgOpenStorage(info->pITStorage,
 387                 chm_file->chm_file ? chm_file->chm_file : parent_chm, NULL,
 388                 STGM_READ | STGM_SHARE_DENY_WRITE, NULL, 0, &storage);
 389         if(FAILED(hres)) {
 390             WARN("Could not open storage: %08x\n", hres);
 391             return NULL;
 392         }
 393     }else {
 394         storage = info->pStorage;
 395         IStorage_AddRef(info->pStorage);
 396     }
 397
 398     hres = IStorage_OpenStream(storage, chm_file->chm_index, NULL, STGM_READ, 0, &stream);
 399     IStorage_Release(storage);
 400     if(FAILED(hres))
 401         WARN("Could not open stream: %08x\n", hres);
 402
 403     return stream;
 404 }
 405
 406 /* Opens the CHM file for reading */
 407 CHMInfo *OpenCHM(LPCWSTR szFile)
 408 {
 409     HRESULT hres;
 410     CHMInfo *ret;
 411
 412     static const WCHAR wszSTRINGS[] = {'#','S','T','R','I','N','G','S',0};
 413
 414     if (!(ret = heap_alloc_zero(sizeof(CHMInfo))))
 415         return NULL;
 416
 417     if (!(ret->szFile = strdupW(szFile))) {
 418         heap_free(ret);
 419         return NULL;
 420     }
 421
 422     hres = CoCreateInstance(&CLSID_ITStorage, NULL, CLSCTX_INPROC_SERVER,
 423             &IID_IITStorage, (void **) &ret->pITStorage) ;
 424     if(FAILED(hres)) {
 425         WARN("Could not create ITStorage: %08x\n", hres);
 426         return CloseCHM(ret);
 427     }
 428
 429     hres = IITStorage_StgOpenStorage(ret->pITStorage, szFile, NULL,
 430             STGM_READ | STGM_SHARE_DENY_WRITE, NULL, 0, &ret->pStorage);
 431     if(FAILED(hres)) {
 432         WARN("Could not open storage: %08x\n", hres);
 433         return CloseCHM(ret);
 434     }
 435     hres = IStorage_OpenStream(ret->pStorage, wszSTRINGS, NULL, STGM_READ, 0,
 436             &ret->strings_stream);
 437     if(FAILED(hres)) {
 438         WARN("Could not open #STRINGS stream: %08x\n", hres);
 439         /* It's not critical, so we pass */
 440     }
 441
 442     if(!ReadChmSystem(ret)) {
 443         WARN("Could not read #SYSTEM\n");
 444         return CloseCHM(ret);
 445     }
 446
 447     return ret;
 448 }
 449
 450 CHMInfo *CloseCHM(CHMInfo *chm)
 451 {
 452     if(chm->pITStorage)
 453         IITStorage_Release(chm->pITStorage);
 454
 455     if(chm->pStorage)
 456         IStorage_Release(chm->pStorage);
 457
 458     if(chm->strings_stream)
 459         IStream_Release(chm->strings_stream);
 460
 461     if(chm->strings_size) {
 462         DWORD i;
 463
 464         for(i=0; i<chm->strings_size; i++)
 465             heap_free(chm->strings[i]);
 466     }
 467
 468     heap_free(chm->strings);
 469     heap_free(chm->defTitle);
 470     heap_free(chm->defTopic);
 471     heap_free(chm->defToc);
 472     heap_free(chm->szFile);
 473     heap_free(chm->compiledFile);
 474     heap_free(chm);
 475
 476     return NULL;
 477 }