mimecmn.cpp

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/////////////////////////////////////////////////////////////////////////////
// Name:        common/mimecmn.cpp
// Purpose:     classes and functions to manage MIME types
// Author:      Vadim Zeitlin
// Modified by:
//  Chris Elliott ([e-mail]) 5 Dec 00: write support for Win32
// Created:     23.09.98
// RCS-ID:      $Id: mimecmn.cpp,v 1.40 2005/07/21 16:19:40 ABX Exp $
// Copyright:   (c) 1998 Vadim Zeitlin <[e-mail]>
// Licence:     wxWindows licence (part of wxExtra library)
/////////////////////////////////////////////////////////////////////////////

// ============================================================================
// declarations
// ============================================================================

// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------

#ifdef    __GNUG__
    #pragma implementation "mimetypebase.h"
#endif

// for compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#if wxUSE_MIMETYPE

#ifndef WX_PRECOMP
  #include "wx/string.h"
#endif //WX_PRECOMP

#include "wx/module.h"
#include "wx/log.h"
#include "wx/file.h"
#include "wx/iconloc.h"
#include "wx/intl.h"
#include "wx/dynarray.h"
#include "wx/confbase.h"

#include "wx/mimetype.h"

// other standard headers
#include <ctype.h>

// implementation classes:
#if defined(__WXMSW__)
    #include "wx/msw/mimetype.h"
#elif defined(__WXMAC__)
    #include "wx/mac/mimetype.h"
#elif defined(__WXPM__) || defined (__EMX__)
    #include "wx/os2/mimetype.h"
    #undef __UNIX__
#elif defined(__DOS__)
    #include "wx/msdos/mimetype.h"
#else // Unix
    #include "wx/unix/mimetype.h"
#endif

// ============================================================================
// common classes
// ============================================================================

// ----------------------------------------------------------------------------
// wxFileTypeInfo
// ----------------------------------------------------------------------------

wxFileTypeInfo::wxFileTypeInfo(const wxChar *mimeType,
                               const wxChar *openCmd,
                               const wxChar *printCmd,
                               const wxChar *desc,
                               ...)
              : m_mimeType(mimeType),
                m_openCmd(openCmd),
                m_printCmd(printCmd),
                m_desc(desc)
{
    va_list argptr;
    va_start(argptr, desc);

    for ( ;; )
    {
        const wxChar *ext = va_arg(argptr, const wxChar *);
        if ( !ext )
        {
            // NULL terminates the list
            break;
        }

        m_exts.Add(ext);
    }

    va_end(argptr);
}


wxFileTypeInfo::wxFileTypeInfo(const wxArrayString& sArray)
{
    m_mimeType = sArray [0u];
    m_openCmd  = sArray [1u];
    m_printCmd = sArray [2u];
    m_desc     = sArray [3u];

    size_t count = sArray.GetCount();
    for ( size_t i = 4; i < count; i++ )
    {
        m_exts.Add(sArray[i]);
    }
}

#include "wx/arrimpl.cpp"
WX_DEFINE_OBJARRAY(wxArrayFileTypeInfo);

// ============================================================================
// implementation of the wrapper classes
// ============================================================================

// ----------------------------------------------------------------------------
// wxFileType
// ----------------------------------------------------------------------------

/* static */
wxString wxFileType::ExpandCommand(const wxString& command,
                                   const wxFileType::MessageParameters& params)
{
    bool hasFilename = false;

    wxString str;
    for ( const wxChar *pc = command.c_str(); *pc != wxT('\0'); pc++ ) {
        if ( *pc == wxT('%') ) {
            switch ( *++pc ) {
                case wxT('s'):
                    // '%s' expands into file name (quoted because it might
                    // contain spaces) - except if there are already quotes
                    // there because otherwise some programs may get confused
                    // by double double quotes
#if 0
                    if ( *(pc - 2) == wxT('"') )
                        str << params.GetFileName();
                    else
                        str << wxT('"') << params.GetFileName() << wxT('"');
#endif
                    str << params.GetFileName();
                    hasFilename = true;
                    break;

                case wxT('t'):
                    // '%t' expands into MIME type (quote it too just to be
                    // consistent)
                    str << wxT('\'') << params.GetMimeType() << wxT('\'');
                    break;

                case wxT('{'):
                    {
                        const wxChar *pEnd = wxStrchr(pc, wxT('}'));
                        if ( pEnd == NULL ) {
                            wxString mimetype;
                            wxLogWarning(_("Unmatched '{' in an entry for mime type %s."),
                                         params.GetMimeType().c_str());
                            str << wxT("%{");
                        }
                        else {
                            wxString param(pc + 1, pEnd - pc - 1);
                            str << wxT('\'') << params.GetParamValue(param) << wxT('\'');
                            pc = pEnd;
                        }
                    }
                    break;

                case wxT('n'):
                case wxT('F'):
                    // TODO %n is the number of parts, %F is an array containing
                    //      the names of temp files these parts were written to
                    //      and their mime types.
                    break;

                default:
                    wxLogDebug(wxT("Unknown field %%%c in command '%s'."),
                               *pc, command.c_str());
                    str << *pc;
            }
        }
        else {
            str << *pc;
        }
    }

    // metamail(1) man page states that if the mailcap entry doesn't have '%s'
    // the program will accept the data on stdin so normally we should append
    // "< %s" to the end of the command in such case, but not all commands
    // behave like this, in particular a common test is 'test -n "$DISPLAY"'
    // and appending "< %s" to this command makes the test fail... I don't
    // know of the correct solution, try to guess what we have to do.

    // test now carried out on reading file so test should never get here
    if ( !hasFilename && !str.empty()
#ifdef __UNIX__
                      && !str.StartsWith(_T("test "))
#endif // Unix
       ) {
        str << wxT(" < '") << params.GetFileName() << wxT('\'');
    }

    return str;
}

wxFileType::wxFileType(const wxFileTypeInfo& info)
{
    m_info = &info;
    m_impl = NULL;
}

wxFileType::wxFileType()
{
    m_info = NULL;
    m_impl = new wxFileTypeImpl;
}

wxFileType::~wxFileType()
{
    if ( m_impl )
        delete m_impl;
}

bool wxFileType::GetExtensions(wxArrayString& extensions)
{
    if ( m_info )
    {
        extensions = m_info->GetExtensions();
        return true;
    }

    return m_impl->GetExtensions(extensions);
}

bool wxFileType::GetMimeType(wxString *mimeType) const
{
    wxCHECK_MSG( mimeType, false, _T("invalid parameter in GetMimeType") );

    if ( m_info )
    {
        *mimeType = m_info->GetMimeType();

        return true;
    }

    return m_impl->GetMimeType(mimeType);
}

bool wxFileType::GetMimeTypes(wxArrayString& mimeTypes) const
{
    if ( m_info )
    {
        mimeTypes.Clear();
        mimeTypes.Add(m_info->GetMimeType());

        return true;
    }

    return m_impl->GetMimeTypes(mimeTypes);
}

bool wxFileType::GetIcon(wxIconLocation *iconLoc) const
{
    if ( m_info )
    {
        if ( iconLoc )
        {
            iconLoc->SetFileName(m_info->GetIconFile());
#ifdef __WXMSW__
            iconLoc->SetIndex(m_info->GetIconIndex());
#endif // __WXMSW__
        }

        return true;
    }

    return m_impl->GetIcon(iconLoc);
}

bool
wxFileType::GetIcon(wxIconLocation *iconloc,
                    const MessageParameters& params) const
{
    if ( !GetIcon(iconloc) )
    {
        return false;
    }

    // we may have "%s" in the icon location string, at least under Windows, so
    // expand this
    if ( iconloc )
    {
        iconloc->SetFileName(ExpandCommand(iconloc->GetFileName(), params));
    }

    return true;
}

bool wxFileType::GetDescription(wxString *desc) const
{
    wxCHECK_MSG( desc, false, _T("invalid parameter in GetDescription") );

    if ( m_info )
    {
        *desc = m_info->GetDescription();

        return true;
    }

    return m_impl->GetDescription(desc);
}

bool
wxFileType::GetOpenCommand(wxString *openCmd,
                           const wxFileType::MessageParameters& params) const
{
    wxCHECK_MSG( openCmd, false, _T("invalid parameter in GetOpenCommand") );

    if ( m_info )
    {
        *openCmd = ExpandCommand(m_info->GetOpenCommand(), params);

        return true;
    }