435 lines
13 KiB
C
435 lines
13 KiB
C
/*
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* CHM Utility API
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*
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* Copyright 2005 James Hawkins
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* Copyright 2007 Jacek Caban
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "hhctrl.h"
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#include "winreg.h"
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#include "shlwapi.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(htmlhelp);
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#define BLOCK_BITS 12
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#define BLOCK_SIZE (1 << BLOCK_BITS)
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#define BLOCK_MASK (BLOCK_SIZE-1)
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/* Reads a string from the #STRINGS section in the CHM file */
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static LPCSTR GetChmString(CHMInfo *chm, DWORD offset)
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{
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if(!chm->strings_stream)
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return NULL;
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if(chm->strings_size <= (offset >> BLOCK_BITS)) {
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chm->strings_size = (offset >> BLOCK_BITS)+1;
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if(chm->strings)
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chm->strings = heap_realloc_zero(chm->strings,
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chm->strings_size*sizeof(char*));
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else
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chm->strings = heap_alloc_zero(
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chm->strings_size*sizeof(char*));
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}
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if(!chm->strings[offset >> BLOCK_BITS]) {
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LARGE_INTEGER pos;
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DWORD read;
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HRESULT hres;
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pos.QuadPart = offset & ~BLOCK_MASK;
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hres = IStream_Seek(chm->strings_stream, pos, STREAM_SEEK_SET, NULL);
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if(FAILED(hres)) {
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WARN("Seek failed: %08x\n", hres);
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return NULL;
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}
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chm->strings[offset >> BLOCK_BITS] = heap_alloc(BLOCK_SIZE);
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hres = IStream_Read(chm->strings_stream, chm->strings[offset >> BLOCK_BITS],
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BLOCK_SIZE, &read);
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if(FAILED(hres)) {
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WARN("Read failed: %08x\n", hres);
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heap_free(chm->strings[offset >> BLOCK_BITS]);
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chm->strings[offset >> BLOCK_BITS] = NULL;
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return NULL;
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}
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}
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return chm->strings[offset >> BLOCK_BITS] + (offset & BLOCK_MASK);
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}
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static BOOL ReadChmSystem(CHMInfo *chm)
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{
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IStream *stream;
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DWORD ver=0xdeadbeef, read, buf_size;
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char *buf;
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HRESULT hres;
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struct {
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WORD code;
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WORD len;
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} entry;
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static const WCHAR wszSYSTEM[] = {'#','S','Y','S','T','E','M',0};
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hres = IStorage_OpenStream(chm->pStorage, wszSYSTEM, NULL, STGM_READ, 0, &stream);
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if(FAILED(hres)) {
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WARN("Could not open #SYSTEM stream: %08x\n", hres);
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return FALSE;
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}
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IStream_Read(stream, &ver, sizeof(ver), &read);
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TRACE("version is %x\n", ver);
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buf = heap_alloc(8*sizeof(DWORD));
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buf_size = 8*sizeof(DWORD);
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while(1) {
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hres = IStream_Read(stream, &entry, sizeof(entry), &read);
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if(hres != S_OK)
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break;
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if(entry.len > buf_size)
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buf = heap_realloc(buf, buf_size=entry.len);
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hres = IStream_Read(stream, buf, entry.len, &read);
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if(hres != S_OK)
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break;
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switch(entry.code) {
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case 0x0:
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TRACE("TOC is %s\n", debugstr_an(buf, entry.len));
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heap_free(chm->defToc);
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chm->defToc = strdupnAtoW(buf, entry.len);
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break;
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case 0x2:
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TRACE("Default topic is %s\n", debugstr_an(buf, entry.len));
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heap_free(chm->defTopic);
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chm->defTopic = strdupnAtoW(buf, entry.len);
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break;
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case 0x3:
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TRACE("Title is %s\n", debugstr_an(buf, entry.len));
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heap_free(chm->defTitle);
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chm->defTitle = strdupnAtoW(buf, entry.len);
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break;
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case 0x5:
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TRACE("Default window is %s\n", debugstr_an(buf, entry.len));
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break;
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case 0x6:
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TRACE("Compiled file is %s\n", debugstr_an(buf, entry.len));
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break;
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case 0x9:
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TRACE("Version is %s\n", debugstr_an(buf, entry.len));
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break;
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case 0xa:
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TRACE("Time is %08x\n", *(DWORD*)buf);
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break;
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case 0xc:
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TRACE("Number of info types: %d\n", *(DWORD*)buf);
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break;
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case 0xf:
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TRACE("Check sum: %x\n", *(DWORD*)buf);
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break;
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default:
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TRACE("unhandled code %x, size %x\n", entry.code, entry.len);
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}
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}
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heap_free(buf);
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IStream_Release(stream);
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return SUCCEEDED(hres);
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}
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LPWSTR FindContextAlias(CHMInfo *chm, DWORD index)
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{
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IStream *ivb_stream;
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DWORD size, read, i;
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DWORD *buf;
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LPCSTR ret = NULL;
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HRESULT hres;
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static const WCHAR wszIVB[] = {'#','I','V','B',0};
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hres = IStorage_OpenStream(chm->pStorage, wszIVB, NULL, STGM_READ, 0, &ivb_stream);
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if(FAILED(hres)) {
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WARN("Could not open #IVB stream: %08x\n", hres);
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return NULL;
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}
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hres = IStream_Read(ivb_stream, &size, sizeof(size), &read);
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if(FAILED(hres)) {
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WARN("Read failed: %08x\n", hres);
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IStream_Release(ivb_stream);
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return NULL;
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}
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buf = heap_alloc(size);
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hres = IStream_Read(ivb_stream, buf, size, &read);
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IStream_Release(ivb_stream);
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if(FAILED(hres)) {
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WARN("Read failed: %08x\n", hres);
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heap_free(buf);
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return NULL;
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}
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size /= 2*sizeof(DWORD);
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for(i=0; i<size; i++) {
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if(buf[2*i] == index) {
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ret = GetChmString(chm, buf[2*i+1]);
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break;
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}
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}
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heap_free(buf);
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TRACE("returning %s\n", debugstr_a(ret));
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return strdupAtoW(ret);
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}
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/* Loads the HH_WINTYPE data from the CHM file
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*
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* FIXME: There may be more than one window type in the file, so
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* add the ability to choose a certain window type
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*/
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BOOL LoadWinTypeFromCHM(HHInfo *info)
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{
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LARGE_INTEGER liOffset;
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IStorage *pStorage = info->pCHMInfo->pStorage;
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IStream *pStream;
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HRESULT hr;
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DWORD cbRead;
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static const WCHAR windowsW[] = {'#','W','I','N','D','O','W','S',0};
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hr = IStorage_OpenStream(pStorage, windowsW, NULL, STGM_READ, 0, &pStream);
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if (FAILED(hr))
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{
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/* no defined window types so use (hopefully) sane defaults */
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static const WCHAR defaultwinW[] = {'d','e','f','a','u','l','t','w','i','n','\0'};
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static const WCHAR null[] = {0};
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memset((void*)&(info->WinType), 0, sizeof(info->WinType));
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info->WinType.cbStruct=sizeof(info->WinType);
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info->WinType.fUniCodeStrings=TRUE;
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info->WinType.pszType=strdupW(defaultwinW);
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info->WinType.pszToc = strdupW(info->pCHMInfo->defToc ? info->pCHMInfo->defToc : null);
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info->WinType.pszIndex = strdupW(null);
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info->WinType.fsValidMembers=0;
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info->WinType.fsWinProperties=HHWIN_PROP_TRI_PANE;
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info->WinType.pszCaption=strdupW(info->pCHMInfo->defTitle);
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info->WinType.dwStyles=WS_POPUP;
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info->WinType.dwExStyles=0;
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info->WinType.nShowState=SW_SHOW;
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info->WinType.pszFile=strdupW(info->pCHMInfo->defTopic);
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info->WinType.curNavType=HHWIN_NAVTYPE_TOC;
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return TRUE;
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}
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/* jump past the #WINDOWS header */
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liOffset.QuadPart = sizeof(DWORD) * 2;
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hr = IStream_Seek(pStream, liOffset, STREAM_SEEK_SET, NULL);
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if (FAILED(hr)) goto done;
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/* read the HH_WINTYPE struct data */
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hr = IStream_Read(pStream, &info->WinType, sizeof(info->WinType), &cbRead);
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if (FAILED(hr)) goto done;
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/* convert the #STRINGS offsets to actual strings */
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info->WinType.pszType = info->pszType = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszType));
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info->WinType.pszCaption = info->pszCaption = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszCaption));
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info->WinType.pszToc = info->pszToc = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszToc));
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info->WinType.pszIndex = info->pszIndex = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszIndex));
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info->WinType.pszFile = info->pszFile = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszFile));
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info->WinType.pszHome = info->pszHome = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszHome));
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info->WinType.pszJump1 = info->pszJump1 = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszJump1));
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info->WinType.pszJump2 = info->pszJump2 = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszJump2));
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info->WinType.pszUrlJump1 = info->pszUrlJump1 = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszUrlJump1));
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info->WinType.pszUrlJump2 = info->pszUrlJump2 = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszUrlJump2));
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/* FIXME: pszCustomTabs is a list of multiple zero-terminated strings so ReadString won't
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* work in this case
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*/
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#if 0
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info->WinType.pszCustomTabs = info->pszCustomTabs = CHM_ReadString(pChmInfo, (DWORD_PTR)info->WinType.pszCustomTabs);
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#endif
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done:
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IStream_Release(pStream);
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return SUCCEEDED(hr);
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}
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static LPCWSTR skip_schema(LPCWSTR url)
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{
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static const WCHAR its_schema[] = {'i','t','s',':'};
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static const WCHAR msits_schema[] = {'m','s','-','i','t','s',':'};
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static const WCHAR mk_schema[] = {'m','k',':','@','M','S','I','T','S','t','o','r','e',':'};
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if(!strncmpiW(its_schema, url, sizeof(its_schema)/sizeof(WCHAR)))
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return url+sizeof(its_schema)/sizeof(WCHAR);
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if(!strncmpiW(msits_schema, url, sizeof(msits_schema)/sizeof(WCHAR)))
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return url+sizeof(msits_schema)/sizeof(WCHAR);
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if(!strncmpiW(mk_schema, url, sizeof(mk_schema)/sizeof(WCHAR)))
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return url+sizeof(mk_schema)/sizeof(WCHAR);
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return url;
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}
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void SetChmPath(ChmPath *file, LPCWSTR base_file, LPCWSTR path)
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{
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LPCWSTR ptr;
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static const WCHAR separatorW[] = {':',':',0};
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path = skip_schema(path);
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ptr = strstrW(path, separatorW);
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if(ptr) {
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WCHAR chm_file[MAX_PATH];
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WCHAR rel_path[MAX_PATH];
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WCHAR base_path[MAX_PATH];
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LPWSTR p;
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strcpyW(base_path, base_file);
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p = strrchrW(base_path, '\\');
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if(p)
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*p = 0;
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memcpy(rel_path, path, (ptr-path)*sizeof(WCHAR));
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rel_path[ptr-path] = 0;
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PathCombineW(chm_file, base_path, rel_path);
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file->chm_file = strdupW(chm_file);
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ptr += 2;
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}else {
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file->chm_file = strdupW(base_file);
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ptr = path;
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}
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file->chm_index = strdupW(ptr);
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TRACE("ChmFile = {%s %s}\n", debugstr_w(file->chm_file), debugstr_w(file->chm_index));
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}
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IStream *GetChmStream(CHMInfo *info, LPCWSTR parent_chm, ChmPath *chm_file)
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{
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IStorage *storage;
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IStream *stream = NULL;
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HRESULT hres;
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TRACE("%s (%s :: %s)\n", debugstr_w(parent_chm), debugstr_w(chm_file->chm_file),
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debugstr_w(chm_file->chm_index));
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if(parent_chm || chm_file->chm_file) {
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hres = IITStorage_StgOpenStorage(info->pITStorage,
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chm_file->chm_file ? chm_file->chm_file : parent_chm, NULL,
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STGM_READ | STGM_SHARE_DENY_WRITE, NULL, 0, &storage);
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if(FAILED(hres)) {
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WARN("Could not open storage: %08x\n", hres);
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return NULL;
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}
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}else {
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storage = info->pStorage;
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IStorage_AddRef(info->pStorage);
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}
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hres = IStorage_OpenStream(storage, chm_file->chm_index, NULL, STGM_READ, 0, &stream);
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IStorage_Release(storage);
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if(FAILED(hres))
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WARN("Could not open stream: %08x\n", hres);
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return stream;
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}
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/* Opens the CHM file for reading */
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CHMInfo *OpenCHM(LPCWSTR szFile)
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{
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HRESULT hres;
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CHMInfo *ret;
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static const WCHAR wszSTRINGS[] = {'#','S','T','R','I','N','G','S',0};
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if (!(ret = heap_alloc_zero(sizeof(CHMInfo))))
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return NULL;
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if (!(ret->szFile = strdupW(szFile))) {
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heap_free(ret);
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return NULL;
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}
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hres = CoCreateInstance(&CLSID_ITStorage, NULL, CLSCTX_INPROC_SERVER,
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&IID_IITStorage, (void **) &ret->pITStorage) ;
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if(FAILED(hres)) {
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WARN("Could not create ITStorage: %08x\n", hres);
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return CloseCHM(ret);
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}
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hres = IITStorage_StgOpenStorage(ret->pITStorage, szFile, NULL,
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STGM_READ | STGM_SHARE_DENY_WRITE, NULL, 0, &ret->pStorage);
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if(FAILED(hres)) {
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WARN("Could not open storage: %08x\n", hres);
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return CloseCHM(ret);
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}
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hres = IStorage_OpenStream(ret->pStorage, wszSTRINGS, NULL, STGM_READ, 0,
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&ret->strings_stream);
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if(FAILED(hres)) {
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WARN("Could not open #STRINGS stream: %08x\n", hres);
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/* It's not critical, so we pass */
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}
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if(!ReadChmSystem(ret)) {
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WARN("Could not read #SYSTEM\n");
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return CloseCHM(ret);
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}
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return ret;
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}
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CHMInfo *CloseCHM(CHMInfo *chm)
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{
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if(chm->pITStorage)
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IITStorage_Release(chm->pITStorage);
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if(chm->pStorage)
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IStorage_Release(chm->pStorage);
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if(chm->strings_stream)
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IStream_Release(chm->strings_stream);
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if(chm->strings_size) {
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DWORD i;
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for(i=0; i<chm->strings_size; i++)
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heap_free(chm->strings[i]);
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}
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heap_free(chm->strings);
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heap_free(chm->defTitle);
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heap_free(chm->defTopic);
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heap_free(chm->defToc);
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heap_free(chm->szFile);
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heap_free(chm);
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return NULL;
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}
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