wxWidgets/include/wx/html/helpdata.h

/////////////////////////////////////////////////////////////////////////////
// Name:        helpdata.h
// Purpose:     wxHtmlHelpData
// Notes:       Based on htmlhelp.cpp, implementing a monolithic
//              HTML Help controller class,  by Vaclav Slavik
// Author:      Harm van der Heijden and Vaclav Slavik
// RCS-ID:      $Id$
// Copyright:   (c) Harm van der Heijden and Vaclav Slavik
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifndef _WX_HELPDATA_H_
#define _WX_HELPDATA_H_

#ifdef __GNUG__
#pragma interface
#endif

#include "wx/defs.h"

#if wxUSE_HTML

#include "wx/object.h"
#include "wx/string.h"
#include "wx/filesys.h"
#include "wx/dynarray.h"
#include "wx/font.h"

//--------------------------------------------------------------------------------
// helper classes & structs
//--------------------------------------------------------------------------------

class WXDLLEXPORT wxHtmlBookRecord : public wxObject
{
    public:
        wxHtmlBookRecord(const wxString& basepath, const wxString& title,
                         const wxString& start)
        {
            m_BasePath = basepath;
            m_Title = title;
            m_Start = start;
            // for debugging, give the contents index obvious default values
            m_ContentsStart = m_ContentsEnd = -1;
        }
        wxString GetTitle() const { return m_Title; }
        wxString GetStart() const { return m_Start; }
        wxString GetBasePath() const { return m_BasePath; }
        /* SetContentsRange: store in the bookrecord where in the index/contents lists the
         * book's records are stored. This to facilitate searching in a specific book.
         * This code will have to be revised when loading/removing books becomes dynamic.
         * (as opposed to appending only)
         * Note that storing index range is pointless, because the index is alphab. sorted. */
        void SetContentsRange(int start, int end) { m_ContentsStart = start; m_ContentsEnd = end; }
        int GetContentsStart() const { return m_ContentsStart; }
        int GetContentsEnd() const { return m_ContentsEnd; }

    protected:
        wxString m_BasePath;
        wxString m_Title;
        wxString m_Start;
        int m_ContentsStart;
        int m_ContentsEnd;
};


WX_DECLARE_EXPORTED_OBJARRAY(wxHtmlBookRecord, wxHtmlBookRecArray);


typedef struct
{
    short int m_Level;
    int m_ID;
    wxChar* m_Name;
    wxChar* m_Page;
    wxHtmlBookRecord *m_Book;
}
wxHtmlContentsItem;

//------------------------------------------------------------------------------
// wxSearchEngine
//                  This class takes input streams and scans them for occurence
//                  of keyword(s)
//------------------------------------------------------------------------------
class WXDLLEXPORT wxSearchEngine : public wxObject
{
    public:
        wxSearchEngine() : wxObject() {m_Keyword = NULL; }
        ~wxSearchEngine() {if (m_Keyword) free(m_Keyword); }

        virtual void LookFor(const wxString& keyword, bool case_sensitive, bool whole_words_only);
        // Sets the keyword we will be searching for

        virtual bool Scan(wxInputStream *stream);
        // Scans the stream for the keyword.
        // Returns TRUE if the stream contains keyword, fALSE otherwise

    private:
        wxChar *m_Keyword;
        bool m_CaseSensitive;
        bool m_WholeWords;
};

class wxHtmlHelpData;

// State information of a search action. I'd have prefered to make this a nested
// class inside wxHtmlHelpData, but that's against coding standards :-(
// Never construct this class yourself, obtain a copy from
// wxHtmlHelpData::PrepareKeywordSearch(const wxString& key)
class WXDLLEXPORT wxHtmlSearchStatus
{
    public:
        // constructor; supply wxHtmlHelpData ptr, the keyword and (optionally) the
        // title of the book to search. By default, all books are searched.

        wxHtmlSearchStatus(wxHtmlHelpData* base, const wxString& keyword,
                           bool case_sensitive, bool whole_words_only,
                           const wxString& book = wxEmptyString);
        bool Search();  // do the next iteration
        bool IsActive() { return m_Active; }
        int GetCurIndex() { return m_CurIndex; }
        int GetMaxIndex() { return m_MaxIndex; }
        const wxString& GetName() { return m_Name; }
        wxHtmlContentsItem* GetContentsItem() { return m_ContentsItem; }

    private:
        wxHtmlHelpData* m_Data;
        wxSearchEngine m_Engine;
        wxString m_Keyword, m_Name;
        wxChar *m_LastPage;
        wxHtmlContentsItem* m_ContentsItem;
        bool m_Active;   // search is not finished
        int m_CurIndex;  // where we are now
        int m_MaxIndex;  // number of files we search
        // For progress bar: 100*curindex/maxindex = % complete
};

class WXDLLEXPORT wxHtmlHelpData : public wxObject
{
        DECLARE_DYNAMIC_CLASS(wxHtmlHelpData)

        friend class wxHtmlSearchStatus;

    public:
        wxHtmlHelpData();
        ~wxHtmlHelpData();

        void SetTempDir(const wxString& path);
        // Sets directory where temporary files are stored.
        // These temp files are index & contents file in binary (much faster to read)
        // form. These files are NOT deleted on program's exit.

        bool AddBook(const wxString& book);
        // Adds new book. 'book' is location of .htb file (stands for "html book").
        // See documentation for details on its format.
        // Returns success.
        bool AddBookParam(const wxFSFile& bookfile,
                          wxFontEncoding encoding,
                          const wxString& title, const wxString& contfile,
                          const wxString& indexfile = wxEmptyString,
                          const wxString& deftopic = wxEmptyString,
                          const wxString& path = wxEmptyString);

        // Some accessing stuff
        wxString FindPageByName(const wxString& page);
        // returns URL of page on basis of (file)name
        wxString FindPageById(int id);
        // returns URL of page on basis of MS id

        const wxHtmlBookRecArray& GetBookRecArray() { return m_BookRecords; }
        wxHtmlContentsItem* GetContents() { return m_Contents; }
        int GetContentsCnt() { return m_ContentsCnt; }
        wxHtmlContentsItem* GetIndex() { return m_Index; }
        int GetIndexCnt() { return m_IndexCnt; }

    protected:
        wxString m_TempPath;

        wxHtmlBookRecArray m_BookRecords;
        // each book has one record in this array
        wxHtmlContentsItem* m_Contents;
        int m_ContentsCnt;
        // list of all available books and pages.
        wxHtmlContentsItem* m_Index;
        int m_IndexCnt;
        // list of index items

    protected:
        bool LoadMSProject(wxHtmlBookRecord *book, wxFileSystem& fsys,
                           const wxString& indexfile, const wxString& contentsfile);
        // Imports .hhp files (MS HTML Help Workshop)
        bool LoadCachedBook(wxHtmlBookRecord *book, wxInputStream *f);
        // Reads binary book
        bool SaveCachedBook(wxHtmlBookRecord *book, wxOutputStream *f);
        // Writes binary book
};

#endif

#endif