helpdata.cpp

来自「A*算法 A*算法 A*算法 A*算法A*算法A*算法」· C++ 代码 · 共 1,035 行 · 第 1/2 页

    wxFSFile *fi;
    wxHtmlBookRecord *bookr;

    int IndexOld = m_index.size(),
        ContentsOld = m_contents.size();

    if (!path.IsEmpty())
        fsys.ChangePathTo(path, true);

    size_t booksCnt = m_bookRecords.GetCount();
    for (size_t i = 0; i < booksCnt; i++)
    {
        if ( m_bookRecords[i].GetBookFile() == bookfile.GetLocation() )
            return true; // book is (was) loaded
    }

    bookr = new wxHtmlBookRecord(bookfile.GetLocation(), fsys.GetPath(), title, deftopic);

    wxHtmlHelpDataItem *bookitem = new wxHtmlHelpDataItem;
    bookitem->level = 0;
    bookitem->id = 0;
    bookitem->page = deftopic;
    bookitem->name = title;
    bookitem->book = bookr;

    // store the contents index for later
    int cont_start = m_contents.size();

    m_contents.Add(bookitem);

    // Try to find cached binary versions:
    // 1. save file as book, but with .hhp.cached extension
    // 2. same as 1. but in temp path
    // 3. otherwise or if cache load failed, load it from MS.

    fi = fsys.OpenFile(bookfile.GetLocation() + wxT(".cached"));

    if (fi == NULL ||
#if wxUSE_DATETIME
          fi->GetModificationTime() < bookfile.GetModificationTime() ||
#endif // wxUSE_DATETIME
          !LoadCachedBook(bookr, fi->GetStream()))
    {
        if (fi != NULL) delete fi;
        fi = fsys.OpenFile(m_tempPath + wxFileNameFromPath(bookfile.GetLocation()) + wxT(".cached"));
        if (m_tempPath.empty() || fi == NULL ||
#if wxUSE_DATETIME
            fi->GetModificationTime() < bookfile.GetModificationTime() ||
#endif // wxUSE_DATETIME
            !LoadCachedBook(bookr, fi->GetStream()))
        {
            LoadMSProject(bookr, fsys, indexfile, contfile);
            if (!m_tempPath.empty())
            {
                wxFileOutputStream *outs = new wxFileOutputStream(m_tempPath +
                                                  SafeFileName(wxFileNameFromPath(bookfile.GetLocation())) + wxT(".cached"));
                SaveCachedBook(bookr, outs);
                delete outs;
            }
        }
    }

    if (fi != NULL) delete fi;

    // Now store the contents range
    bookr->SetContentsRange(cont_start, m_contents.size());

#if wxUSE_WCHAR_T
    // MS HTML Help files [written by MS HTML Help Workshop] are broken
    // in that the data are iso-8859-1 (including HTML entities), but must
    // be interpreted as being in language's windows charset. Correct the
    // differences here and also convert to wxConvLocal in ANSI build
    if (encoding != wxFONTENCODING_SYSTEM)
    {
        #if wxUSE_UNICODE
            #define CORRECT_STR(str, conv) \
                str = wxString((str).mb_str(wxConvISO8859_1), conv)
        #else
            #define CORRECT_STR(str, conv) \
                str = wxString((str).wc_str(conv), wxConvLocal)
        #endif
        wxCSConv conv(encoding);
        size_t IndexCnt = m_index.size();
        size_t ContentsCnt = m_contents.size();
        size_t i;
        for (i = IndexOld; i < IndexCnt; i++)
        {
            CORRECT_STR(m_index[i].name, conv);
        }
        for (i = ContentsOld; i < ContentsCnt; i++)
        {
            CORRECT_STR(m_contents[i].name, conv);
        }
        #undef CORRECT_STR
    }
#else
    wxUnusedVar(IndexOld);
    wxUnusedVar(ContentsOld);
    wxASSERT_MSG(encoding == wxFONTENCODING_SYSTEM, wxT("Help files need charset conversion, but wxUSE_WCHAR_T is 0"));
#endif // wxUSE_WCHAR_T/!wxUSE_WCHAR_T

    m_bookRecords.Add(bookr);
    if (!m_index.empty())
    {
        m_index.Sort(wxHtmlHelpIndexCompareFunc);
    }

    return true;
}


bool wxHtmlHelpData::AddBook(const wxString& book)
{
    wxString extension(book.Right(4).Lower());
    if (extension == wxT(".zip") ||
#if wxUSE_LIBMSPACK
        extension == wxT(".chm") /*compressed html help book*/ ||
#endif
        extension == wxT(".htb") /*html book*/)
    {
        wxFileSystem fsys;
        wxString s;
        bool rt = false;

#if wxUSE_LIBMSPACK
        if (extension == wxT(".chm"))
            s = fsys.FindFirst(book + wxT("#chm:*.hhp"), wxFILE);
        else
#endif
            s = fsys.FindFirst(book + wxT("#zip:*.hhp"), wxFILE);

        while (!s.IsEmpty())
        {
            if (AddBook(s)) rt = true;
            s = fsys.FindNext();
        }

        return rt;
    }

    wxFSFile *fi;
    wxFileSystem fsys;

    wxString title = _("noname"),
             safetitle,
             start = wxEmptyString,
             contents = wxEmptyString,
             index = wxEmptyString,
             charset = wxEmptyString;

    fi = fsys.OpenFile(book);
    if (fi == NULL)
    {
        wxLogError(_("Cannot open HTML help book: %s"), book.c_str());
        return false;
    }
    fsys.ChangePathTo(book);

    const wxChar *lineptr;
    wxChar linebuf[300];
    wxString tmp;
    wxHtmlFilterPlainText filter;
    tmp = filter.ReadFile(*fi);
    lineptr = tmp.c_str();

    do
    {
        lineptr = ReadLine(lineptr, linebuf, 300);

        for (wxChar *ch = linebuf; *ch != wxT('\0') && *ch != wxT('='); ch++)
           *ch = (wxChar)wxTolower(*ch);

        if (wxStrstr(linebuf, _T("title=")) == linebuf)
            title = linebuf + wxStrlen(_T("title="));
        if (wxStrstr(linebuf, _T("default topic=")) == linebuf)
            start = linebuf + wxStrlen(_T("default topic="));
        if (wxStrstr(linebuf, _T("index file=")) == linebuf)
            index = linebuf + wxStrlen(_T("index file="));
        if (wxStrstr(linebuf, _T("contents file=")) == linebuf)
            contents = linebuf + wxStrlen(_T("contents file="));
        if (wxStrstr(linebuf, _T("charset=")) == linebuf)
            charset = linebuf + wxStrlen(_T("charset="));
    } while (lineptr != NULL);

    wxFontEncoding enc = wxFONTENCODING_SYSTEM;
#if wxUSE_FONTMAP
    if (charset != wxEmptyString)
        enc = wxFontMapper::Get()->CharsetToEncoding(charset);
#endif

    bool rtval = AddBookParam(*fi, enc,
                              title, contents, index, start, fsys.GetPath());
    delete fi;

#if WXWIN_COMPATIBILITY_2_4
    CleanCompatibilityData();
#endif

    return rtval;
}

wxString wxHtmlHelpData::FindPageByName(const wxString& x)
{
    int cnt;
    int i;
    wxFileSystem fsys;
    wxFSFile *f;

    /* 1. try to open given file: */

    cnt = m_bookRecords.GetCount();
    for (i = 0; i < cnt; i++)
    {
        f = fsys.OpenFile(m_bookRecords[i].GetFullPath(x));
        if (f)
        {
            wxString url = m_bookRecords[i].GetFullPath(x);
            delete f;
            return url;
        }
    }


    /* 2. try to find a book: */

    for (i = 0; i < cnt; i++)
    {
        if (m_bookRecords[i].GetTitle() == x)
            return m_bookRecords[i].GetFullPath(m_bookRecords[i].GetStart());
    }

    /* 3. try to find in contents: */

    cnt = m_contents.size();
    for (i = 0; i < cnt; i++)
    {
        if (m_contents[i].name == x)
            return m_contents[i].GetFullPath();
    }


    /* 4. try to find in index: */

    cnt = m_index.size();
    for (i = 0; i < cnt; i++)
    {
        if (m_index[i].name == x)
            return m_index[i].GetFullPath();
    }

    return wxEmptyString;
}

wxString wxHtmlHelpData::FindPageById(int id)
{
    size_t cnt = m_contents.size();
    for (size_t i = 0; i < cnt; i++)
    {
        if (m_contents[i].id == id)
        {
            return m_contents[i].GetFullPath();
        }
    }

    return wxEmptyString;
}

#if WXWIN_COMPATIBILITY_2_4
wxHtmlContentsItem::wxHtmlContentsItem()
    : m_Level(0), m_ID(wxID_ANY), m_Name(NULL), m_Page(NULL), m_Book(NULL),
      m_autofree(false)
{
}

wxHtmlContentsItem::wxHtmlContentsItem(const wxHtmlHelpDataItem& d)
{
    m_autofree = true;
    m_Level = d.level;
    m_ID = d.id;
    m_Name = wxStrdup(d.name.c_str());
    m_Page = wxStrdup(d.page.c_str());
    m_Book = d.book;
}

wxHtmlContentsItem& wxHtmlContentsItem::operator=(const wxHtmlContentsItem& d)
{
    if (m_autofree)
    {
        free(m_Name);
        free(m_Page);
    }
    m_autofree = true;
    m_Level = d.m_Level;
    m_ID = d.m_ID;
    m_Name = d.m_Name ? wxStrdup(d.m_Name) : NULL;
    m_Page = d.m_Page ? wxStrdup(d.m_Page) : NULL;
    m_Book = d.m_Book;
    return *this;
}

wxHtmlContentsItem::~wxHtmlContentsItem()
{
    if (m_autofree)
    {
        free(m_Name);
        free(m_Page);
    }
}

wxHtmlContentsItem* wxHtmlHelpData::GetContents()
{
    if (!m_cacheContents && !m_contents.empty())
    {
        size_t len = m_contents.size();
        m_cacheContents = new wxHtmlContentsItem[len];
        for (size_t i = 0; i < len; i++)
            m_cacheContents[i] = m_contents[i];
    }
    return m_cacheContents;
}

int wxHtmlHelpData::GetContentsCnt()
{
    return m_contents.size();
}

wxHtmlContentsItem* wxHtmlHelpData::GetIndex()
{
    if (!m_cacheContents && !m_index.empty())
    {
        size_t len = m_index.size();
        m_cacheContents = new wxHtmlContentsItem[len];
        for (size_t i = 0; i < len; i++)
            m_cacheContents[i] = m_index[i];
    }
    return m_cacheContents;
}

int wxHtmlHelpData::GetIndexCnt()
{
    return m_index.size();
}

void wxHtmlHelpData::CleanCompatibilityData()
{
    delete[] m_cacheContents;
    m_cacheContents = NULL;
    delete[] m_cacheIndex;
    m_cacheIndex = NULL;
}
#endif // WXWIN_COMPATIBILITY_2_4

//----------------------------------------------------------------------------------
// wxHtmlSearchStatus functions
//----------------------------------------------------------------------------------

wxHtmlSearchStatus::wxHtmlSearchStatus(wxHtmlHelpData* data, const wxString& keyword,
                                       bool case_sensitive, bool whole_words_only,
                                       const wxString& book)
{
    m_Data = data;
    m_Keyword = keyword;
    wxHtmlBookRecord* bookr = NULL;
    if (book != wxEmptyString)
    {
        // we have to search in a specific book. Find it first
        int i, cnt = data->m_bookRecords.GetCount();
        for (i = 0; i < cnt; i++)
            if (data->m_bookRecords[i].GetTitle() == book)
            {
                bookr = &(data->m_bookRecords[i]);
                m_CurIndex = bookr->GetContentsStart();
                m_MaxIndex = bookr->GetContentsEnd();
                break;
            }
        // check; we won't crash if the book doesn't exist, but it's Bad Anyway.
        wxASSERT(bookr);
    }
    if (! bookr)
    {
        // no book specified; search all books
        m_CurIndex = 0;
        m_MaxIndex = m_Data->m_contents.size();
    }
    m_Engine.LookFor(keyword, case_sensitive, whole_words_only);
    m_Active = (m_CurIndex < m_MaxIndex);
}

#if WXWIN_COMPATIBILITY_2_4
wxHtmlContentsItem* wxHtmlSearchStatus::GetContentsItem()
{
    static wxHtmlContentsItem it;
    it = wxHtmlContentsItem(*m_CurItem);
    return &it;
}
#endif

bool wxHtmlSearchStatus::Search()
{
    wxFSFile *file;
    int i = m_CurIndex;  // shortcut
    bool found = false;
    wxString thepage;

    if (!m_Active)
    {
        // sanity check. Illegal use, but we'll try to prevent a crash anyway
        wxASSERT(m_Active);
        return false;
    }

    m_Name = wxEmptyString;
    m_CurItem = NULL;
    thepage = m_Data->m_contents[i].page;

    m_Active = (++m_CurIndex < m_MaxIndex);
    // check if it is same page with different anchor:
    if (!m_LastPage.empty())
    {
        const wxChar *p1, *p2;
        for (p1 = thepage.c_str(), p2 = m_LastPage.c_str();
             *p1 != 0 && *p1 != _T('#') && *p1 == *p2; p1++, p2++) {}

        m_LastPage = thepage;

        if (*p1 == 0 || *p1 == _T('#'))
            return false;
    }
    else m_LastPage = thepage;

    wxFileSystem fsys;
    file = fsys.OpenFile(m_Data->m_contents[i].book->GetFullPath(thepage));
    if (file)
    {
        if (m_Engine.Scan(*file))
        {
            m_Name = m_Data->m_contents[i].name;
            m_CurItem = &m_Data->m_contents[i];
            found = true;
        }
        delete file;
    }
    return found;
}








//--------------------------------------------------------------------------------
// wxHtmlSearchEngine
//--------------------------------------------------------------------------------

void wxHtmlSearchEngine::LookFor(const wxString& keyword, bool case_sensitive, bool whole_words_only)
{
    m_CaseSensitive = case_sensitive;
    m_WholeWords = whole_words_only;
    m_Keyword = keyword;

    if (!m_CaseSensitive)
        m_Keyword.LowerCase();
}


static inline bool WHITESPACE(wxChar c)
{
    return c == _T(' ') || c == _T('\n') || c == _T('\r') || c == _T('\t');
}

bool wxHtmlSearchEngine::Scan(const wxFSFile& file)
{
    wxASSERT_MSG(!m_Keyword.empty(), wxT("wxHtmlSearchEngine::LookFor must be called before scanning!"));

    int i, j;
    int wrd = m_Keyword.Length();
    bool found = false;
    wxHtmlFilterHTML filter;
    wxString tmp = filter.ReadFile(file);
    int lng = tmp.length();
    const wxChar *buf = tmp.c_str();

    if (!m_CaseSensitive)
        tmp.LowerCase();

    const wxChar *kwd = m_Keyword.c_str();

    if (m_WholeWords)
    {
        for (i = 0; i < lng - wrd; i++)
        {
            if (WHITESPACE(buf[i])) continue;
            j = 0;
            while ((j < wrd) && (buf[i + j] == kwd[j])) j++;
            if (j == wrd && WHITESPACE(buf[i + j])) { found = true; break; }
        }
    }

    else
    {
        for (i = 0; i < lng - wrd; i++)
        {
            j = 0;
            while ((j < wrd) && (buf[i + j] == kwd[j])) j++;
            if (j == wrd) { found = true; break; }
        }
    }

    return found;
}



#endif