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/*
* TFileEditor.cc
*
* Turbo Vision - Version 2.0
*
* Copyright (c) 1994 by Borland International
* All Rights Reserved.
*
* Modified by Sergio Sigala <sergio@sigala.it>
* Modified by Max Okumoto <okumoto@ucsd.edu>
*/
#define Uses_TProgram
#define Uses_TGroup
#define Uses_TEditor
#define Uses_TFileEditor
#define Uses_TEvent
#define Uses_opstream
#define Uses_ipstream
#include <tvision/tv.h>
#include <fstream>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
using std::ifstream;
using std::ios;
using std::ofstream;
using std::streampos;
inline ushort min( ushort u1, ushort u2 )
{
return u1 < u2 ? u1 : u2;
}
inline uint min( uint u1, uint u2 )
{
return u1 < u2 ? u1 : u2;
}
TFileEditor::TFileEditor( const TRect& bounds,
TScrollBar *aHScrollBar,
TScrollBar *aVScrollBar,
TIndicator *aIndicator,
const char *aFileName
) :
TEditor( bounds, aHScrollBar, aVScrollBar, aIndicator, 0 )
{
if( aFileName == 0 )
fileName[0] = EOS;
else
{
strcpy( fileName, aFileName );
fexpand( fileName );
if( isValid )
isValid = loadFile();
}
}
void TFileEditor::doneBuffer()
{
delete buffer;
}
void TFileEditor::handleEvent( TEvent& event )
{
TEditor::handleEvent(event);
switch( event.what )
{
case evCommand:
switch( event.message.command )
{
case cmSave:
save();
break;
case cmSaveAs:
saveAs();
break;
default:
return;
}
break;
default:
return;
}
clearEvent(event);
}
void TFileEditor::initBuffer()
{
buffer = new char[bufSize];
}
Boolean TFileEditor::loadFile()
{
ifstream f( fileName, ios::in | ios::binary );
if( !f )
{
setBufLen( 0 );
return True;
}
else
{
streampos fSize = filelength(f);
if( setBufSize(fSize) == False )
{
editorDialog( edOutOfMemory );
return False;
}
f.read( &buffer[bufSize - fSize], fSize );
if( !f )
{
editorDialog( edReadError, fileName );
return False;
}
else
{
setBufLen(fSize);
return True;
}
}
}
Boolean TFileEditor::save()
{
if( *fileName == EOS )
return saveAs();
else
return saveFile();
}
Boolean TFileEditor::saveAs()
{
Boolean res = False;
if( editorDialog( edSaveAs, fileName ) != cmCancel )
{
fexpand( fileName );
message( owner, evBroadcast, cmUpdateTitle, 0 );
res = saveFile();
if( isClipboard() == True )
*fileName = EOS;
}
return res;
}
static void writeBlock( ofstream& f, char *buf, uint len )
{
while( len > 0 )
{
int l = len < INT_MAX ? len : INT_MAX;
f.write( buf, l );
buf += l;
len -= l;
}
}
Boolean TFileEditor::saveFile()
{
if( (editorFlags & efBackupFiles) != 0 )
{
/* SS: little change */
char backupName[PATH_MAX];
sprintf(backupName, "%s%s", fileName, backupExt);
rename( fileName, backupName );
}
ofstream f( fileName, ios::out | ios::binary );
if( !f )
{
editorDialog( edCreateError, fileName );
return False;
}
else
{
writeBlock( f, buffer, curPtr );
writeBlock( f, buffer+curPtr+gapLen, bufLen-curPtr );
if( !f )
{
editorDialog( edWriteError, fileName );
return False;
}
else
{
modified = False;
update(ufUpdate);
}
}
return True;
}
Boolean TFileEditor::setBufSize( uint newSize )
{
if( newSize == 0)
newSize = 0x1000;
else
newSize = (newSize + 0x0FFF) & 0xFFFFF000;
if( newSize != bufSize )
{
char *temp = buffer;
/* Bypass safety pool to allocate buffer, but check for possible
NULL return value. */
if( (buffer = (char *) malloc( newSize )) == 0 )
{
delete temp;
return False;
}
ulong n = bufLen - curPtr + delCount;
memcpy( buffer, temp, min( newSize, bufSize ) );
memmove( &buffer[newSize - n], &temp[bufSize - n], n );
delete temp;
bufSize = newSize;
gapLen = bufSize - bufLen;
}
return True;
}
void TFileEditor::shutDown()
{
setCmdState(cmSave, False);
setCmdState(cmSaveAs, False);
TEditor::shutDown();
}
void TFileEditor::updateCommands()
{
TEditor::updateCommands();
setCmdState(cmSave, True);
setCmdState(cmSaveAs, True);
}
Boolean TFileEditor::valid( ushort command )
{
if( command == cmValid )
return isValid;
else
{
if( modified == True )
{
int d;
if( *fileName == EOS )
d = edSaveUntitled;
else
d = edSaveModify;
switch( editorDialog( d, fileName ) )
{
case cmYes:
return save();
case cmNo:
modified = False;
return True;
case cmCancel:
return False;
}
}
}
return True;
}
#if !defined(NO_STREAMABLE)
void TFileEditor::write( opstream& os )
{
TEditor::write( os );
os.writeString( fileName );
os << selStart << selEnd << curPtr;
}
void *TFileEditor::read( ipstream& is )
{
TEditor::read( is );
bufSize = 0;
is.readString( fileName, sizeof( fileName ) );
if( isValid )
{
isValid = loadFile();
ulong sStart, sEnd, curs;
is >> sStart >> sEnd >> curs;
if( isValid && sEnd <= bufLen )
{
setSelect( sStart, sEnd, Boolean(curs == sStart) );
trackCursor( True );
}
}
return this;
}
TStreamable *TFileEditor::build()
{
return new TFileEditor( streamableInit );
}
TFileEditor::TFileEditor( StreamableInit ) : TEditor( streamableInit )
{
}
#endif
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