utilscmn.cpp

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/////////////////////////////////////////////////////////////////////////////
// Name:        utilscmn.cpp
// Purpose:     Miscellaneous utility functions and classes
// Author:      Julian Smart
// Modified by:
// Created:     29/01/98
// RCS-ID:      $Id: utilscmn.cpp,v 1.145.2.1 2005/10/06 13:29:33 VZ Exp $
// Copyright:   (c) 1998 Julian Smart
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

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

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

#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) && !defined(__EMX__)
// Some older compilers (such as EMX) cannot handle
// #pragma interface/implementation correctly, iff
// #pragma implementation is used in _two_ translation
// units (as created by e.g. event.cpp compiled for
// libwx_base and event.cpp compiled for libwx_gui_core).
// So we must not use those pragmas for those compilers in
// such files.
    #pragma implementation "utils.h"
#endif

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

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#ifndef WX_PRECOMP
    #include "wx/app.h"
    #include "wx/string.h"
    #include "wx/utils.h"
    #include "wx/intl.h"
    #include "wx/log.h"

    #if wxUSE_GUI
        #include "wx/window.h"
        #include "wx/frame.h"
        #include "wx/menu.h"
        #include "wx/msgdlg.h"
        #include "wx/textdlg.h"
        #include "wx/textctrl.h"    // for wxTE_PASSWORD
        #if wxUSE_ACCEL
            #include "wx/menuitem.h"
            #include "wx/accel.h"
        #endif // wxUSE_ACCEL
    #endif // wxUSE_GUI
#endif // WX_PRECOMP

#include "wx/apptrait.h"

#include "wx/process.h"
#include "wx/txtstrm.h"
#include "wx/uri.h"
#include "wx/mimetype.h"
#include "wx/config.h"

#if defined(__WXWINCE__) && wxUSE_DATETIME
#include "wx/datetime.h"
#endif

#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#if !defined(__WATCOMC__)
    #if !(defined(_MSC_VER) && (_MSC_VER > 800))
        #include <errno.h>
    #endif
#endif

#if wxUSE_GUI
    #include "wx/colordlg.h"
    #include "wx/fontdlg.h"
    #include "wx/notebook.h"
    #include "wx/frame.h"
    #include "wx/statusbr.h"
#endif // wxUSE_GUI

#ifndef __WXWINCE__
#include <time.h>
#else
#include "wx/msw/wince/time.h"
#endif

#if !defined(__MWERKS__) && !defined(__WXWINCE__)
    #include <sys/types.h>
    #include <sys/stat.h>
#endif

#if defined(__WXMSW__)
    #include "wx/msw/private.h"
#endif

#if wxUSE_BASE

// ----------------------------------------------------------------------------
// common data
// ----------------------------------------------------------------------------

#if WXWIN_COMPATIBILITY_2_2
    const wxChar *wxInternalErrorStr = wxT("wxWidgets Internal Error");
    const wxChar *wxFatalErrorStr = wxT("wxWidgets Fatal Error");
#endif // WXWIN_COMPATIBILITY_2_2

// ============================================================================
// implementation
// ============================================================================

#if WXWIN_COMPATIBILITY_2_4

wxChar *
copystring (const wxChar *s)
{
    if (s == NULL) s = wxEmptyString;
    size_t len = wxStrlen (s) + 1;

    wxChar *news = new wxChar[len];
    memcpy (news, s, len * sizeof(wxChar));    // Should be the fastest

    return news;
}

#endif // WXWIN_COMPATIBILITY_2_4

// ----------------------------------------------------------------------------
// String <-> Number conversions (deprecated)
// ----------------------------------------------------------------------------

#if WXWIN_COMPATIBILITY_2_4

WXDLLIMPEXP_DATA_BASE(const wxChar *) wxFloatToStringStr = wxT("%.2f");
WXDLLIMPEXP_DATA_BASE(const wxChar *) wxDoubleToStringStr = wxT("%.2f");

void
StringToFloat (const wxChar *s, float *number)
{
    if (s && *s && number)
        *number = (float) wxStrtod (s, (wxChar **) NULL);
}

void
StringToDouble (const wxChar *s, double *number)
{
    if (s && *s && number)
        *number = wxStrtod (s, (wxChar **) NULL);
}

wxChar *
FloatToString (float number, const wxChar *fmt)
{
    static wxChar buf[256];

    wxSprintf (buf, fmt, number);
    return buf;
}

wxChar *
DoubleToString (double number, const wxChar *fmt)
{
    static wxChar buf[256];

    wxSprintf (buf, fmt, number);
    return buf;
}

void
StringToInt (const wxChar *s, int *number)
{
    if (s && *s && number)
        *number = (int) wxStrtol (s, (wxChar **) NULL, 10);
}

void
StringToLong (const wxChar *s, long *number)
{
    if (s && *s && number)
        *number = wxStrtol (s, (wxChar **) NULL, 10);
}

wxChar *
IntToString (int number)
{
    static wxChar buf[20];

    wxSprintf (buf, wxT("%d"), number);
    return buf;
}

wxChar *
LongToString (long number)
{
    static wxChar buf[20];

    wxSprintf (buf, wxT("%ld"), number);
    return buf;
}

#endif // WXWIN_COMPATIBILITY_2_4

// Array used in DecToHex conversion routine.
static wxChar hexArray[] = wxT("0123456789ABCDEF");

// Convert 2-digit hex number to decimal
int wxHexToDec(const wxString& buf)
{
    int firstDigit, secondDigit;

    if (buf.GetChar(0) >= wxT('A'))
        firstDigit = buf.GetChar(0) - wxT('A') + 10;
    else
       firstDigit = buf.GetChar(0) - wxT('0');

    if (buf.GetChar(1) >= wxT('A'))
        secondDigit = buf.GetChar(1) - wxT('A') + 10;
    else
        secondDigit = buf.GetChar(1) - wxT('0');

    return (firstDigit & 0xF) * 16 + (secondDigit & 0xF );
}

// Convert decimal integer to 2-character hex string
void wxDecToHex(int dec, wxChar *buf)
{
    int firstDigit = (int)(dec/16.0);
    int secondDigit = (int)(dec - (firstDigit*16.0));
    buf[0] = hexArray[firstDigit];
    buf[1] = hexArray[secondDigit];
    buf[2] = 0;
}

// Convert decimal integer to 2-character hex string
wxString wxDecToHex(int dec)
{
    wxChar buf[3];
    wxDecToHex(dec, buf);
    return wxString(buf);
}

// ----------------------------------------------------------------------------
// misc functions
// ----------------------------------------------------------------------------

// Return the current date/time
wxString wxNow()
{
#ifdef __WXWINCE__
#if wxUSE_DATETIME
    wxDateTime now = wxDateTime::Now();
    return now.Format();
#else
    return wxEmptyString;
#endif
#else
    time_t now = time((time_t *) NULL);
    char *date = ctime(&now);
    date[24] = '\0';
    return wxString::FromAscii(date);
#endif
}

void wxUsleep(unsigned long milliseconds)
{
    wxMilliSleep(milliseconds);
}

const wxChar *wxGetInstallPrefix()
{
    wxString prefix;

    if ( wxGetEnv(wxT("WXPREFIX"), &prefix) )
        return prefix.c_str();

#ifdef wxINSTALL_PREFIX
    return wxT(wxINSTALL_PREFIX);
#else
    return wxEmptyString;
#endif
}

wxString wxGetDataDir()
{
    wxString dir = wxGetInstallPrefix();
    dir <<  wxFILE_SEP_PATH << wxT("share") << wxFILE_SEP_PATH << wxT("wx");
    return dir;
}

int wxGetOsVersion(int *verMaj, int *verMin)
{
    // we want this function to work even if there is no wxApp
    wxConsoleAppTraits traitsConsole;
    wxAppTraits *traits = wxTheApp ? wxTheApp->GetTraits() : NULL;
    if ( ! traits )
        traits = &traitsConsole;

    wxToolkitInfo& info = traits->GetToolkitInfo();
    if ( verMaj )
        *verMaj = info.versionMajor;
    if ( verMin )
        *verMin = info.versionMinor;
    return info.os;
}

// ----------------------------------------------------------------------------
// network and user id functions
// ----------------------------------------------------------------------------

// Get Full RFC822 style email address
bool wxGetEmailAddress(wxChar *address, int maxSize)
{
    wxString email = wxGetEmailAddress();
    if ( !email )
        return false;

    wxStrncpy(address, email, maxSize - 1);
    address[maxSize - 1] = wxT('\0');

    return true;
}

wxString wxGetEmailAddress()
{
    wxString email;

    wxString host = wxGetFullHostName();
    if ( !host.empty() )
    {
        wxString user = wxGetUserId();
        if ( !user.empty() )
        {
            email << user << wxT('@') << host;
        }
    }

    return email;
}

wxString wxGetUserId()
{
    static const int maxLoginLen = 256; // FIXME arbitrary number

    wxString buf;
    bool ok = wxGetUserId(wxStringBuffer(buf, maxLoginLen), maxLoginLen);

    if ( !ok )
        buf.Empty();

    return buf;
}

wxString wxGetUserName()
{
    static const int maxUserNameLen = 1024; // FIXME arbitrary number

    wxString buf;
    bool ok = wxGetUserName(wxStringBuffer(buf, maxUserNameLen), maxUserNameLen);

    if ( !ok )
        buf.Empty();

    return buf;
}

wxString wxGetHostName()
{
    static const size_t hostnameSize = 257;

    wxString buf;
    bool ok = wxGetHostName(wxStringBuffer(buf, hostnameSize), hostnameSize);

    if ( !ok )
        buf.Empty();

    return buf;
}

wxString wxGetFullHostName()
{
    static const size_t hostnameSize = 257;

    wxString buf;
    bool ok = wxGetFullHostName(wxStringBuffer(buf, hostnameSize), hostnameSize);

    if ( !ok )
        buf.Empty();

    return buf;
}

wxString wxGetHomeDir()
{
    wxString home;
    wxGetHomeDir(&home);

    return home;
}

#if 0

wxString wxGetCurrentDir()
{
    wxString dir;
    size_t len = 1024;
    bool ok;
    do
    {
        ok = getcwd(dir.GetWriteBuf(len + 1), len) != NULL;
        dir.UngetWriteBuf();

        if ( !ok )
        {
            if ( errno != ERANGE )
            {
                wxLogSysError(_T("Failed to get current directory"));

                return wxEmptyString;
            }
            else
            {
                // buffer was too small, retry with a larger one
                len *= 2;
            }
        }
        //else: ok
    } while ( !ok );

    return dir;
}

#endif // 0

// ----------------------------------------------------------------------------
// wxExecute
// ----------------------------------------------------------------------------

// wxDoExecuteWithCapture() helper: reads an entire stream into one array
//
// returns true if ok, false if error
#if wxUSE_STREAMS
static bool ReadAll(wxInputStream *is, wxArrayString& output)
{
    wxCHECK_MSG( is, false, _T("NULL stream in wxExecute()?") );

    // the stream could be already at EOF or in wxSTREAM_BROKEN_PIPE state
    is->Reset();

    wxTextInputStream tis(*is);

    bool cont = true;
    while ( cont )
    {
        wxString line = tis.ReadLine();
        if ( is->Eof() )
            break;

        if ( !*is )
        {
            cont = false;
        }
        else
        {
            output.Add(line);
        }
    }

    return cont;
}
#endif // wxUSE_STREAMS

// this is a private function because it hasn't a clean interface: the first
// array is passed by reference, the second by pointer - instead we have 2
// public versions of wxExecute() below
static long wxDoExecuteWithCapture(const wxString& command,
                                   wxArrayString& output,
                                   wxArrayString* error,
                                   int flags)
{
    // create a wxProcess which will capture the output
    wxProcess *process = new wxProcess;
    process->Redirect();

    long rc = wxExecute(command, wxEXEC_SYNC | flags, process);

#if wxUSE_STREAMS
    if ( rc != -1 )
    {
        if ( !ReadAll(process->GetInputStream(), output) )
            rc = -1;

        if ( error )
        {
            if ( !ReadAll(process->GetErrorStream(), *error) )
                rc = -1;
        }

    }
#else
    wxUnusedVar(output);
    wxUnusedVar(error);
#endif // wxUSE_STREAMS/!wxUSE_STREAMS

    delete process;

    return rc;
}

long wxExecute(const wxString& command, wxArrayString& output, int flags)
{
    return wxDoExecuteWithCapture(command, output, NULL, flags);
}

long wxExecute(const wxString& command,
               wxArrayString& output,
               wxArrayString& error,
               int flags)
{
    return wxDoExecuteWithCapture(command, output, &error, flags);
}

// ----------------------------------------------------------------------------
// Launch default browser
// ----------------------------------------------------------------------------

bool wxLaunchDefaultBrowser(const wxString& url)
{
    bool success = true;

    wxString finalurl = url;

    //if it isn't a full url, try appending http:// to it
    if(wxURI(url).IsReference())
        finalurl = wxString(wxT("http://")) + url;

#if defined(__WXMSW__) && wxUSE_CONFIG_NATIVE

    wxString command;

    // ShellExecute() always opens in the same window,
    // so do it manually for new window (from Mahogany)
    wxRegKey key(wxRegKey::HKCR, url.BeforeFirst(':') + wxT("\\shell\\open"));
    if ( key.Exists() )
    {
        wxRegKey keyDDE(key, wxT("DDEExec"));
        if ( keyDDE.Exists() )
        {
            wxRegKey keyTopic(keyDDE, wxT("topic"));
            wxString ddeTopic = keyTopic.QueryDefaultValue();

            // we only know the syntax of WWW_OpenURL DDE request
            if ( ddeTopic == wxT("WWW_OpenURL") )
            {
                wxString ddeCmd = keyDDE.QueryDefaultValue();

                // this is a bit naive but should work as -1 can't appear
                // elsewhere in the DDE topic, normally
                if ( ddeCmd.Replace(wxT("-1"), wxT("0"),
                                    false /* only first occurence */) == 1 )
                {
                    // and also replace the parameters
                    if ( ddeCmd.Replace(wxT("%1"), url, false) == 1 )
                    {
                        // magic incantation understood by wxMSW
                        command << wxT("WX_DDE#")
                                << wxRegKey(key, wxT("command")).QueryDefaultValue() << wxT('#')
                                << wxRegKey(keyDDE, wxT("application")).QueryDefaultValue()
                                << wxT('#') << ddeTopic << wxT('#')
                                << ddeCmd;
                    }
                }
            }