file.cpp
author insilmaril
Thu, 23 Mar 2006 12:38:54 +0000
changeset 257 199f2626fe70
parent 255 5da693c51f10
child 366 e95081c21da2
permissions -rw-r--r--
Version 1.7.12
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#include <qobject.h>
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#include <qmessagebox.h>
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#include <iostream>
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#include "file.h"
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#include "process.h"
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QString maskPath(QString p)
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{
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	// Change " " to "\ " to enable blanks in filenames
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	p=p.replace(QChar('&'),"\\&");
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	return p.replace(QChar(' '),"\\ ");
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}
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QString convertToRel (const QString &src, const QString &dst)
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{
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	QString s=src;
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	QString d=dst;
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	int i;
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	if (s==d) 
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	{
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		// Special case, we just need the name of the file,
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		// not the complete path
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		i=d.findRev ("/");
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		d=d.right (d.length()-i-1);
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	} else
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	{
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		// Find relative path from src to dst
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		// Remove the first "/"
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		if (s.section ("/",0,0).isEmpty()) 
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		{
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			s=s.right (s.length()-1);
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			d=d.right (d.length()-1);
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		}
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		// remove identical left parts
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		while (s.section("/",0,0) == d.section("/",0,0) ) 
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		{
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			i=s.find ("/");
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			s=s.right (s.length()-i-1);
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			d=d.right (d.length()-i-1);
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		}
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		// Now take care of paths where we have to go back first
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		int srcsep=s.contains("/");
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		int dstsep=d.contains("/");
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		if (srcsep <=  dstsep )
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		{
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			// find path to go up first and then back to dst
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			i=1;
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			while (i<=srcsep) 
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			{
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				d="../"+d;
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				i++;
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			}	
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		}
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	}	
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	return d;
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}
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QString makeUniqueDir (QString s)
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{
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	// Create unique directory e.g. s="/tmp/vym-XXXXXX"
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	// Convert QString to string first
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	char *p;
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	int bytes=s.length();
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	p=(char*) malloc (bytes+1);
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	int i;
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	for (i=0;i<bytes;i++)
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		p[i]=s.at(i).latin1();
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	p[bytes]=0;	
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	QString r=mkdtemp (p);
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	free (p);
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	return r;
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}
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void removeDir(QDir d)
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{
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	if (d.path().left(4)!="/tmp")
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	{
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		// This _should_ not be necessary, but proved to be useful ;-)
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		qWarning ("file.cpp::removeDir should remove "+d.path()+" - aborted.");
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		return;
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	}
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	// Traverse directories
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	d.setFilter( QDir::Dirs| QDir::Hidden | QDir::NoSymLinks );
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	const QFileInfoList *dirlist = d.entryInfoList();
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	QFileInfoListIterator itdir( *dirlist );
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	QFileInfo *fi;
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	while ( (fi = itdir.current()) != 0 ) 
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	{
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		if (fi->fileName() != "." && fi->fileName() != ".." )
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		{
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			if ( !d.cd(fi->fileName()) ) 
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				qWarning ("removeDir() cannot find the directory "+fi->fileName());
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			else 
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			{
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				// Recursively remove subdirs
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				removeDir (d);
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				d.cdUp();
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			}
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		}	
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		++itdir;
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	}		
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	// Traverse files
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	d.setFilter( QDir::Files| QDir::Hidden | QDir::NoSymLinks );
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	const QFileInfoList *filelist = d.entryInfoList();
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	QFileInfoListIterator itfile( *filelist );
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	while ( (fi = itfile.current()) != 0 ) 
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	{
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		QFile (fi->filePath()).remove();
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		++itfile;
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	}	
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	if (!d.rmdir(d.path()))
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		qWarning ("removeDir("+d.path()+") failed!");
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}		
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void makeSubDirs (const QString &s)
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{
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	QDir d(s);
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	d.mkdir(s);
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	d.mkdir ("images");	
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	d.mkdir ("flags");	
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}
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ErrorCode zipDir (const QDir &zipDir, const QString &zipName)
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{
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	ErrorCode err=success;
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	// zip the temporary directory
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	Process *zipProc=new Process ();
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	zipProc->clearArguments();
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	zipProc->setWorkingDirectory (QDir(zipDir));
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	zipProc->addArgument ("zip");
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	zipProc->addArgument ("-r");
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	zipProc->addArgument (zipName);
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	zipProc->addArgument (".");
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	if (!zipProc->start() )
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	{	
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		// zip could not be started
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		QMessageBox::critical( 0, QObject::tr( "Critical Error" ),
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					   QObject::tr("Couldn't start zip to compress data."));
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		err=aborted;
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	} else
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	{
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		// zip could be started
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		zipProc->waitFinished();
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		if (!zipProc->normalExit() )
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		{
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			QMessageBox::critical( 0, QObject::tr( "Critical Error" ),
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						   QObject::tr("zip didn't exit normally")+
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						   "\n" + zipProc->getErrout());
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			err=aborted;
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		} else
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		{
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			if (zipProc->exitStatus()>0)
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			{
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				QMessageBox::critical( 0, QObject::tr( "Critical Error" ),
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						   QString("zip exit code:  %1").arg(zipProc->exitStatus() )+
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						   "\n" + zipProc->getErrout() );
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				err=aborted;
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			}
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		}
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	}	// zip could be started
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	return err;	
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}
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ErrorCode unzipDir (const QDir &zipDir, const QString &zipName)
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{
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	ErrorCode err=success;
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	// Try to unzip file
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	Process *zipProc=new Process ();
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	zipProc->clearArguments();
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	zipProc->setWorkingDirectory (zipDir);
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	zipProc->addArgument ("unzip");
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	zipProc->addArgument ("-o");	// overwrite existing files!
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	zipProc->addArgument (zipName );
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	zipProc->addArgument ("-d");
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	zipProc->addArgument (zipDir.path());
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	if (!zipProc->start() )
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	{
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		QMessageBox::critical( 0, QObject::tr( "Critical Error" ),
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					   QObject::tr("Couldn't start unzip to decompress data."));
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		err=aborted;
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	} else
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	{
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		zipProc->waitFinished();
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		if (!zipProc->normalExit() )
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		{
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			QMessageBox::critical( 0,QObject::tr( "Critical Error" ),
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						   QObject::tr("unzip didn't exit normally") +
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						   zipProc->getErrout() );
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			err=aborted;
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		} else
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		{
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			if (zipProc->exitStatus()>0)
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			{
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				if (zipProc->exitStatus()==9)
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					// no zipped file, but maybe .xml or old version? Try again.
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					err=nozip;
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				else	
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				{
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					QMessageBox::critical( 0, QObject::tr( "Critical Error" ),
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								   QString("unzip exit code:  %1").arg(zipProc->exitStatus() ) +
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								   zipProc->getErrout() );
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					err=aborted;
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				}
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			} 
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		}
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	}
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	return err;	
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}
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bool loadStringFromDisk (const QString &fname, QString &s)
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{
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	s="";
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	QFile file ( fname);
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	if ( !file.open( IO_ReadOnly ) ) return false;
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	QTextStream ts( &file );
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	ts.setEncoding (QTextStream::UnicodeUTF8);
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	while ( !ts.atEnd() ) 
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		s+=ts.readLine()+"\n"; 
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	file.close();
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	return true;
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}
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bool saveStringToDisk (const QString &fname, const QString &s)
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{
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	QFile file( fname);
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	file.setName ( fname);
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	if ( !file.open( IO_WriteOnly ) ) 
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	{
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		file.close();
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		return false;
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	}	
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	// Write it finally, and write in UTF8, no matter what 
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	QTextStream ts( &file );
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	ts.setEncoding (QTextStream::UnicodeUTF8);
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	ts << s;
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	file.close();
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	return true;
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}
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ImagePreview::ImagePreview (QWidget *par=0): QLabel (par)
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{
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	fdia=(QFileDialog*)par;
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}
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void ImagePreview::previewUrl( const QUrl &u )
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{
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    QString path = u.path();
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    QPixmap pix( path );
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    if ( pix.isNull() )
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	{
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		// Strange: If we have fd->setMode (QFileDialog::ExistingFiles)
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		// in the filedialog, then there are 3 calls to previewURL 
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		// for each selection. And only the first is the actual selected file
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		// while the following 2 point to the directory above the current one.
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		// So here's my workaround:
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		if (fdia && fdia->selectedFiles().count()==0)
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			setText( QObject::tr("This is not an image.") );
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		if (fdia &&fdia->selectedFiles().count()>1)
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			setText( QObject::tr("Sorry, no preview for\nmultiple selected files.") );
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	}	
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    else
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	{
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		float max_w=300;
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		float max_h=300;
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		float r;
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		if (pix.width()>max_w)
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		{
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			r=max_w / pix.width();
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			pix.resize(qRound(pix.width()*r), qRound(pix.height()*r));
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			// FIXME not a resize, but a shrink/enlarge is needed here...
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		}
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		if (pix.height()>max_h)
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		{
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			r=max_h / pix.height();
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			pix.resize(qRound(pix.width()*r), qRound(pix.height()*r));
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			// FIXME not a resize, but a shrink/enlarge is needed here...
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		}
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        setPixmap( pix );
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	}	
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}
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