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wine/dlls/hhctrl.ocx/chm.c

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/*
* CHM Utility API
*
* Copyright 2005 James Hawkins
* Copyright 2007 Jacek Caban
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "hhctrl.h"
#include "stream.h"
#include "winreg.h"
#include "shlwapi.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(htmlhelp);
/* Reads a string from the #STRINGS section in the CHM file */
static LPCSTR GetChmString(CHMInfo *chm, DWORD offset)
{
LPCSTR str;
if(!chm->strings_stream)
return NULL;
if(chm->strings_size <= (offset >> BLOCK_BITS)) {
chm->strings_size = (offset >> BLOCK_BITS)+1;
if(chm->strings)
chm->strings = heap_realloc_zero(chm->strings,
chm->strings_size*sizeof(char*));
else
chm->strings = heap_alloc_zero(
chm->strings_size*sizeof(char*));
}
if(!chm->strings[offset >> BLOCK_BITS]) {
LARGE_INTEGER pos;
DWORD read;
HRESULT hres;
pos.QuadPart = offset & ~BLOCK_MASK;
hres = IStream_Seek(chm->strings_stream, pos, STREAM_SEEK_SET, NULL);
if(FAILED(hres)) {
WARN("Seek failed: %08x\n", hres);
return NULL;
}
chm->strings[offset >> BLOCK_BITS] = heap_alloc(BLOCK_SIZE);
hres = IStream_Read(chm->strings_stream, chm->strings[offset >> BLOCK_BITS],
BLOCK_SIZE, &read);
if(FAILED(hres)) {
WARN("Read failed: %08x\n", hres);
heap_free(chm->strings[offset >> BLOCK_BITS]);
chm->strings[offset >> BLOCK_BITS] = NULL;
return NULL;
}
}
str = chm->strings[offset >> BLOCK_BITS] + (offset & BLOCK_MASK);
TRACE("offset %#x => %s\n", offset, debugstr_a(str));
return str;
}
static BOOL ReadChmSystem(CHMInfo *chm)
{
IStream *stream;
DWORD ver=0xdeadbeef, read, buf_size;
char *buf;
HRESULT hres;
struct {
WORD code;
WORD len;
} entry;
static const WCHAR wszSYSTEM[] = {'#','S','Y','S','T','E','M',0};
hres = IStorage_OpenStream(chm->pStorage, wszSYSTEM, NULL, STGM_READ, 0, &stream);
if(FAILED(hres)) {
WARN("Could not open #SYSTEM stream: %08x\n", hres);
return FALSE;
}
IStream_Read(stream, &ver, sizeof(ver), &read);
TRACE("version is %x\n", ver);
buf = heap_alloc(8*sizeof(DWORD));
buf_size = 8*sizeof(DWORD);
while(1) {
hres = IStream_Read(stream, &entry, sizeof(entry), &read);
if(hres != S_OK)
break;
if(entry.len > buf_size)
buf = heap_realloc(buf, buf_size=entry.len);
hres = IStream_Read(stream, buf, entry.len, &read);
if(hres != S_OK)
break;
switch(entry.code) {
case 0x0:
TRACE("TOC is %s\n", debugstr_an(buf, entry.len));
heap_free(chm->defToc);
chm->defToc = strdupnAtoW(buf, entry.len);
break;
case 0x2:
TRACE("Default topic is %s\n", debugstr_an(buf, entry.len));
heap_free(chm->defTopic);
chm->defTopic = strdupnAtoW(buf, entry.len);
break;
case 0x3:
TRACE("Title is %s\n", debugstr_an(buf, entry.len));
heap_free(chm->defTitle);
chm->defTitle = strdupnAtoW(buf, entry.len);
break;
case 0x4:
/* TODO: Currently only the Locale ID is loaded from this field */
TRACE("Locale is: %d\n", *(LCID*)&buf[0]);
if(!GetLocaleInfoW(*(LCID*)&buf[0], LOCALE_IDEFAULTANSICODEPAGE|LOCALE_RETURN_NUMBER,
(WCHAR *)&chm->codePage, sizeof(chm->codePage)/sizeof(WCHAR)))
chm->codePage = CP_ACP;
break;
case 0x5:
TRACE("Window name is %s\n", debugstr_an(buf, entry.len));
chm->defWindow = strdupnAtoW(buf, entry.len);
break;
case 0x6:
TRACE("Compiled file is %s\n", debugstr_an(buf, entry.len));
heap_free(chm->compiledFile);
chm->compiledFile = strdupnAtoW(buf, entry.len);
break;
case 0x9:
TRACE("Version is %s\n", debugstr_an(buf, entry.len));
break;
case 0xa:
TRACE("Time is %08x\n", *(DWORD*)buf);
break;
case 0xc:
TRACE("Number of info types: %d\n", *(DWORD*)buf);
break;
case 0xf:
TRACE("Check sum: %x\n", *(DWORD*)buf);
break;
default:
TRACE("unhandled code %x, size %x\n", entry.code, entry.len);
}
}
heap_free(buf);
IStream_Release(stream);
return SUCCEEDED(hres);
}
LPWSTR FindContextAlias(CHMInfo *chm, DWORD index)
{
IStream *ivb_stream;
DWORD size, read, i;
DWORD *buf;
LPCSTR ret = NULL;
HRESULT hres;
static const WCHAR wszIVB[] = {'#','I','V','B',0};
hres = IStorage_OpenStream(chm->pStorage, wszIVB, NULL, STGM_READ, 0, &ivb_stream);
if(FAILED(hres)) {
WARN("Could not open #IVB stream: %08x\n", hres);
return NULL;
}
hres = IStream_Read(ivb_stream, &size, sizeof(size), &read);
if(FAILED(hres)) {
WARN("Read failed: %08x\n", hres);
IStream_Release(ivb_stream);
return NULL;
}
buf = heap_alloc(size);
hres = IStream_Read(ivb_stream, buf, size, &read);
IStream_Release(ivb_stream);
if(FAILED(hres)) {
WARN("Read failed: %08x\n", hres);
heap_free(buf);
return NULL;
}
size /= 2*sizeof(DWORD);
for(i=0; i<size; i++) {
if(buf[2*i] == index) {
ret = GetChmString(chm, buf[2*i+1]);
break;
}
}
heap_free(buf);
TRACE("returning %s\n", debugstr_a(ret));
return strdupAtoW(ret);
}
/*
* Tests if the file <chmfile>.<ext> exists, used for loading Indices, Table of Contents, etc.
* when these files are not available from the HH_WINTYPE structure.
*/
static WCHAR *FindHTMLHelpSetting(HHInfo *info, const WCHAR *extW)
{
static const WCHAR periodW[] = {'.',0};
IStorage *pStorage = info->pCHMInfo->pStorage;
IStream *pStream;
WCHAR *filename;
HRESULT hr;
filename = heap_alloc( (strlenW(info->pCHMInfo->compiledFile)
+ strlenW(periodW) + strlenW(extW) + 1) * sizeof(WCHAR) );
strcpyW(filename, info->pCHMInfo->compiledFile);
strcatW(filename, periodW);
strcatW(filename, extW);
hr = IStorage_OpenStream(pStorage, filename, NULL, STGM_READ, 0, &pStream);
if (FAILED(hr))
{
heap_free(filename);
return strdupAtoW("");
}
IStream_Release(pStream);
return filename;
}
static inline WCHAR *MergeChmString(LPCWSTR src, WCHAR **dst)
{
if(*dst == NULL)
*dst = strdupW(src);
return *dst;
}
void MergeChmProperties(HH_WINTYPEW *src, HHInfo *info, BOOL override)
{
DWORD unhandled_params = src->fsValidMembers & ~(HHWIN_PARAM_PROPERTIES|HHWIN_PARAM_STYLES
|HHWIN_PARAM_EXSTYLES|HHWIN_PARAM_RECT|HHWIN_PARAM_NAV_WIDTH
|HHWIN_PARAM_SHOWSTATE|HHWIN_PARAM_INFOTYPES|HHWIN_PARAM_TB_FLAGS
|HHWIN_PARAM_EXPANSION|HHWIN_PARAM_TABPOS|HHWIN_PARAM_TABORDER
|HHWIN_PARAM_HISTORY_COUNT|HHWIN_PARAM_CUR_TAB);
HH_WINTYPEW *dst = &info->WinType;
DWORD merge = override ? src->fsValidMembers : src->fsValidMembers & ~dst->fsValidMembers;
if (unhandled_params)
FIXME("Unsupported fsValidMembers fields: 0x%x\n", unhandled_params);
if (merge & HHWIN_PARAM_PROPERTIES) dst->fsWinProperties = src->fsWinProperties;
if (merge & HHWIN_PARAM_STYLES) dst->dwStyles = src->dwStyles;
if (merge & HHWIN_PARAM_EXSTYLES) dst->dwExStyles = src->dwExStyles;
if (merge & HHWIN_PARAM_RECT) dst->rcWindowPos = src->rcWindowPos;
if (merge & HHWIN_PARAM_NAV_WIDTH) dst->iNavWidth = src->iNavWidth;
if (merge & HHWIN_PARAM_SHOWSTATE) dst->nShowState = src->nShowState;
if (merge & HHWIN_PARAM_INFOTYPES) dst->paInfoTypes = src->paInfoTypes;
if (merge & HHWIN_PARAM_TB_FLAGS) dst->fsToolBarFlags = src->fsToolBarFlags;
if (merge & HHWIN_PARAM_EXPANSION) dst->fNotExpanded = src->fNotExpanded;
if (merge & HHWIN_PARAM_TABPOS) dst->tabpos = src->tabpos;
if (merge & HHWIN_PARAM_TABORDER) memcpy(&dst->tabOrder, &src->tabOrder, sizeof(src->tabOrder));
if (merge & HHWIN_PARAM_HISTORY_COUNT) dst->cHistory = src->cHistory;
if (merge & HHWIN_PARAM_CUR_TAB) dst->curNavType = src->curNavType;
dst->fsValidMembers |= merge;
/*
* Note: We assume that hwndHelp, hwndCaller, hwndToolBar, hwndNavigation, and hwndHTML cannot be
* modified by the user. rcHTML and rcMinSize are not currently supported, so don't bother to copy them.
*/
dst->pszType = MergeChmString(src->pszType, &info->stringsW.pszType);
dst->pszFile = MergeChmString(src->pszFile, &info->stringsW.pszFile);
dst->pszToc = MergeChmString(src->pszToc, &info->stringsW.pszToc);
dst->pszIndex = MergeChmString(src->pszIndex, &info->stringsW.pszIndex);
dst->pszCaption = MergeChmString(src->pszCaption, &info->stringsW.pszCaption);
dst->pszHome = MergeChmString(src->pszHome, &info->stringsW.pszHome);
dst->pszJump1 = MergeChmString(src->pszJump1, &info->stringsW.pszJump1);
dst->pszJump2 = MergeChmString(src->pszJump2, &info->stringsW.pszJump2);
dst->pszUrlJump1 = MergeChmString(src->pszUrlJump1, &info->stringsW.pszUrlJump1);
dst->pszUrlJump2 = MergeChmString(src->pszUrlJump2, &info->stringsW.pszUrlJump2);
/* FIXME: pszCustomTabs is a list of multiple zero-terminated strings so ReadString won't
* work in this case
*/
#if 0
dst->pszCustomTabs = MergeChmString(src->pszCustomTabs, &info->pszCustomTabs);
#endif
}
static inline WCHAR *ConvertChmString(HHInfo *info, const WCHAR **str)
{
WCHAR *ret = NULL;
if(*str)
*str = ret = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)*str));
return ret;
}
/* Loads the HH_WINTYPE data from the CHM file
*
* FIXME: There may be more than one window type in the file, so
* add the ability to choose a certain window type
*/
BOOL LoadWinTypeFromCHM(HHInfo *info)
{
LARGE_INTEGER liOffset;
WCHAR *pszType = NULL, *pszFile = NULL, *pszToc = NULL, *pszIndex = NULL, *pszCaption = NULL;
WCHAR *pszHome = NULL, *pszJump1 = NULL, *pszJump2 = NULL, *pszUrlJump1 = NULL, *pszUrlJump2 = NULL;
IStorage *pStorage = info->pCHMInfo->pStorage;
IStream *pStream = NULL;
HH_WINTYPEW wintype;
HRESULT hr;
DWORD cbRead;
BOOL ret = FALSE;
static const WCHAR null[] = {0};
static const WCHAR toc_extW[] = {'h','h','c',0};
static const WCHAR index_extW[] = {'h','h','k',0};
static const WCHAR windowsW[] = {'#','W','I','N','D','O','W','S',0};
hr = IStorage_OpenStream(pStorage, windowsW, NULL, STGM_READ, 0, &pStream);
if (SUCCEEDED(hr))
{
/* jump past the #WINDOWS header */
liOffset.QuadPart = sizeof(DWORD) * 2;
hr = IStream_Seek(pStream, liOffset, STREAM_SEEK_SET, NULL);
if (FAILED(hr)) goto done;
/* read the HH_WINTYPE struct data */
hr = IStream_Read(pStream, &wintype, sizeof(wintype), &cbRead);
if (FAILED(hr)) goto done;
/* convert the #STRINGS offsets to actual strings */
pszType = ConvertChmString(info, &wintype.pszType);
pszFile = ConvertChmString(info, &wintype.pszFile);
pszToc = ConvertChmString(info, &wintype.pszToc);
pszIndex = ConvertChmString(info, &wintype.pszIndex);
pszCaption = ConvertChmString(info, &wintype.pszCaption);
pszHome = ConvertChmString(info, &wintype.pszHome);
pszJump1 = ConvertChmString(info, &wintype.pszJump1);
pszJump2 = ConvertChmString(info, &wintype.pszJump2);
pszUrlJump1 = ConvertChmString(info, &wintype.pszUrlJump1);
pszUrlJump2 = ConvertChmString(info, &wintype.pszUrlJump2);
}
else
{
/* no defined window types so use (hopefully) sane defaults */
static const WCHAR defaultwinW[] = {'d','e','f','a','u','l','t','w','i','n','\0'};
memset(&wintype, 0, sizeof(wintype));
wintype.cbStruct = sizeof(wintype);
wintype.fUniCodeStrings = TRUE;
wintype.pszType = pszType = strdupW(info->pCHMInfo->defWindow ? info->pCHMInfo->defWindow : defaultwinW);
wintype.pszToc = pszToc = strdupW(info->pCHMInfo->defToc ? info->pCHMInfo->defToc : null);
wintype.pszIndex = pszIndex = strdupW(null);
wintype.fsValidMembers = 0;
wintype.fsWinProperties = HHWIN_PROP_TRI_PANE;
wintype.dwStyles = WS_POPUP;
wintype.dwExStyles = 0;
wintype.nShowState = SW_SHOW;
wintype.curNavType = HHWIN_NAVTYPE_TOC;
}
/* merge the new data with any pre-existing HH_WINTYPE structure */
MergeChmProperties(&wintype, info, FALSE);
if (!info->WinType.pszCaption)
info->WinType.pszCaption = info->stringsW.pszCaption = strdupW(info->pCHMInfo->defTitle ? info->pCHMInfo->defTitle : null);
if (!info->WinType.pszFile)
info->WinType.pszFile = info->stringsW.pszFile = strdupW(info->pCHMInfo->defTopic ? info->pCHMInfo->defTopic : null);
if (!info->WinType.pszToc)
info->WinType.pszToc = info->stringsW.pszToc = FindHTMLHelpSetting(info, toc_extW);
if (!info->WinType.pszIndex)
info->WinType.pszIndex = info->stringsW.pszIndex = FindHTMLHelpSetting(info, index_extW);
heap_free(pszType);
heap_free(pszFile);
heap_free(pszToc);
heap_free(pszIndex);
heap_free(pszCaption);
heap_free(pszHome);
heap_free(pszJump1);
heap_free(pszJump2);
heap_free(pszUrlJump1);
heap_free(pszUrlJump2);
ret = TRUE;
done:
if (pStream)
IStream_Release(pStream);
return ret;
}
LPCWSTR skip_schema(LPCWSTR url)
{
static const WCHAR its_schema[] = {'i','t','s',':'};
static const WCHAR msits_schema[] = {'m','s','-','i','t','s',':'};
static const WCHAR mk_schema[] = {'m','k',':','@','M','S','I','T','S','t','o','r','e',':'};
if(!strncmpiW(its_schema, url, sizeof(its_schema)/sizeof(WCHAR)))
return url+sizeof(its_schema)/sizeof(WCHAR);
if(!strncmpiW(msits_schema, url, sizeof(msits_schema)/sizeof(WCHAR)))
return url+sizeof(msits_schema)/sizeof(WCHAR);
if(!strncmpiW(mk_schema, url, sizeof(mk_schema)/sizeof(WCHAR)))
return url+sizeof(mk_schema)/sizeof(WCHAR);
return url;
}
void SetChmPath(ChmPath *file, LPCWSTR base_file, LPCWSTR path)
{
LPCWSTR ptr;
static const WCHAR separatorW[] = {':',':',0};
path = skip_schema(path);
ptr = strstrW(path, separatorW);
if(ptr) {
WCHAR chm_file[MAX_PATH];
WCHAR rel_path[MAX_PATH];
WCHAR base_path[MAX_PATH];
LPWSTR p;
strcpyW(base_path, base_file);
p = strrchrW(base_path, '\\');
if(p)
*p = 0;
memcpy(rel_path, path, (ptr-path)*sizeof(WCHAR));
rel_path[ptr-path] = 0;
PathCombineW(chm_file, base_path, rel_path);
file->chm_file = strdupW(chm_file);
ptr += 2;
}else {
file->chm_file = strdupW(base_file);
ptr = path;
}
file->chm_index = strdupW(ptr);
TRACE("ChmFile = {%s %s}\n", debugstr_w(file->chm_file), debugstr_w(file->chm_index));
}
IStream *GetChmStream(CHMInfo *info, LPCWSTR parent_chm, ChmPath *chm_file)
{
IStorage *storage;
IStream *stream = NULL;
HRESULT hres;
TRACE("%s (%s :: %s)\n", debugstr_w(parent_chm), debugstr_w(chm_file->chm_file),
debugstr_w(chm_file->chm_index));
if(parent_chm || chm_file->chm_file) {
hres = IITStorage_StgOpenStorage(info->pITStorage,
chm_file->chm_file ? chm_file->chm_file : parent_chm, NULL,
STGM_READ | STGM_SHARE_DENY_WRITE, NULL, 0, &storage);
if(FAILED(hres)) {
WARN("Could not open storage: %08x\n", hres);
return NULL;
}
}else {
storage = info->pStorage;
IStorage_AddRef(info->pStorage);
}
hres = IStorage_OpenStream(storage, chm_file->chm_index, NULL, STGM_READ, 0, &stream);
IStorage_Release(storage);
if(FAILED(hres))
WARN("Could not open stream: %08x\n", hres);
return stream;
}
/*
* Retrieve a CHM document and parse the data from the <title> element to get the document's title.
*/
WCHAR *GetDocumentTitle(CHMInfo *info, LPCWSTR document)
{
strbuf_t node, node_name, content;
WCHAR *document_title = NULL;
IStream *str = NULL;
IStorage *storage;
stream_t stream;
HRESULT hres;
TRACE("%s\n", debugstr_w(document));
storage = info->pStorage;
if(!storage) {
WARN("Could not open storage to obtain the title for a document.\n");
return NULL;
}
IStorage_AddRef(storage);
hres = IStorage_OpenStream(storage, document, NULL, STGM_READ, 0, &str);
IStorage_Release(storage);
if(FAILED(hres))
WARN("Could not open stream: %08x\n", hres);
stream_init(&stream, str);
strbuf_init(&node);
strbuf_init(&content);
strbuf_init(&node_name);
while(next_node(&stream, &node)) {
get_node_name(&node, &node_name);
TRACE("%s\n", node.buf);
if(!strcasecmp(node_name.buf, "title")) {
if(next_content(&stream, &content) && content.len > 1)
{
document_title = strdupnAtoW(&content.buf[1], content.len-1);
FIXME("magic: %s\n", debugstr_w(document_title));
break;
}
}
strbuf_zero(&node);
}
strbuf_free(&node);
strbuf_free(&content);
strbuf_free(&node_name);
IStream_Release(str);
return document_title;
}
/* Opens the CHM file for reading */
CHMInfo *OpenCHM(LPCWSTR szFile)
{
HRESULT hres;
CHMInfo *ret;
static const WCHAR wszSTRINGS[] = {'#','S','T','R','I','N','G','S',0};
if (!(ret = heap_alloc_zero(sizeof(CHMInfo))))
return NULL;
ret->codePage = CP_ACP;
if (!(ret->szFile = strdupW(szFile))) {
heap_free(ret);
return NULL;
}
hres = CoCreateInstance(&CLSID_ITStorage, NULL, CLSCTX_INPROC_SERVER,
&IID_IITStorage, (void **) &ret->pITStorage) ;
if(FAILED(hres)) {
WARN("Could not create ITStorage: %08x\n", hres);
return CloseCHM(ret);
}
hres = IITStorage_StgOpenStorage(ret->pITStorage, szFile, NULL,
STGM_READ | STGM_SHARE_DENY_WRITE, NULL, 0, &ret->pStorage);
if(FAILED(hres)) {
WARN("Could not open storage: %08x\n", hres);
return CloseCHM(ret);
}
hres = IStorage_OpenStream(ret->pStorage, wszSTRINGS, NULL, STGM_READ, 0,
&ret->strings_stream);
if(FAILED(hres)) {
WARN("Could not open #STRINGS stream: %08x\n", hres);
/* It's not critical, so we pass */
}
if(!ReadChmSystem(ret)) {
WARN("Could not read #SYSTEM\n");
return CloseCHM(ret);
}
return ret;
}
CHMInfo *CloseCHM(CHMInfo *chm)
{
if(chm->pITStorage)
IITStorage_Release(chm->pITStorage);
if(chm->pStorage)
IStorage_Release(chm->pStorage);
if(chm->strings_stream)
IStream_Release(chm->strings_stream);
if(chm->strings_size) {
DWORD i;
for(i=0; i<chm->strings_size; i++)
heap_free(chm->strings[i]);
}
heap_free(chm->strings);
heap_free(chm->defWindow);
heap_free(chm->defTitle);
heap_free(chm->defTopic);
heap_free(chm->defToc);
heap_free(chm->szFile);
heap_free(chm->compiledFile);
heap_free(chm);
return NULL;
}
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