file.cpp
author insilmaril
Tue, 03 Jun 2008 08:33:34 +0000
changeset 709 25eec6d77740
parent 633 dad2c8993342
child 721 12958f987bcf
permissions -rw-r--r--
Workaround for unreadable file with Qt 4.4
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#include <QDir>
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#include <QMessageBox>
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#include <QPixmap>
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#include <QLabel>
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#include <QTextStream>
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#include <iostream>
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#include "file.h"
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#include "process.h"
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#if defined(Q_OS_WIN32)
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#include "mkdtemp.h"
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#include <windows.h>
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#endif
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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.count("/");
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		int dstsep=d.count("/");
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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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#include <QFileDialog>
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extern QString vymName;
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extern QDir lastFileDir;
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QString browseDirectory (QWidget *parent,const QString &caption)
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{
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	QFileDialog fd(parent,caption);
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	fd.setMode (QFileDialog::DirectoryOnly);
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	fd.setCaption(vymName+ " - "+caption);
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	fd.setDir (lastFileDir);
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	fd.show();
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	if ( fd.exec() == QDialog::Accepted )
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		return fd.selectedFile();
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	else
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		return "";
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}
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bool reallyWriteDirectory(const QString &dir)
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{
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	QStringList eList = QDir(dir).entryList();
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	if (eList.first() ==".")  eList.pop_front();	// remove "."
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	if (eList.first() =="..") eList.pop_front();	// remove "."
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	if (!eList.isEmpty())
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	{
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		QMessageBox mb( vymName,
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			QObject::tr("The directory %1 is not empty.\nDo you risk to overwrite its contents?","write directory").arg(dir),
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		QMessageBox::Warning,
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		QMessageBox::Yes ,
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		QMessageBox::Cancel | QMessageBox::Default,
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		QMessageBox::NoButton );
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		mb.setButtonText( QMessageBox::Yes, QObject::tr("Overwrite") );
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		mb.setButtonText( QMessageBox::No, QObject::tr("Cancel"));
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		switch( mb.exec() ) 
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		{
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			case QMessageBox::Yes:
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				// save 
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				return true;
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			case QMessageBox::Cancel:
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				// do nothing
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				return false;
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		}
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	}
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	return true;
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}
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QString makeTmpDir (bool &ok, QString prefix)
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{
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	bool b;
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	QString path=makeUniqueDir (b,QDir::tempPath()+"/"+prefix+"-XXXXXX");
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	ok=b;
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	return path;
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}
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bool isInTmpDir(QString fn)
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{
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	QString temp=QDir::tempPath();
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	int l=temp.length();
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	return fn.left(l)==temp;
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}
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QString makeUniqueDir (bool &ok,QString s)
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{
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	// Create unique directory e.g. for s="/tmp/vym-XXXXXX"
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	// Convert Separators
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	s=QDir::convertSeparators(s);
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	// Convert QString to string 
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	ok=true;
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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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	if (r.isEmpty()) ok=false;
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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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	// This check should_ not be necessary, but proved to be useful ;-)
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	if (!isInTmpDir(d.path()))
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	{
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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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	QFileInfoList list = d.entryInfoList();
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	QFileInfo fi;
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	for (int i = 0; i < list.size(); ++i) 
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	{
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		fi=list.at(i);
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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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	}
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	// Traverse files
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	d.setFilter( QDir::Files| QDir::Hidden | QDir::NoSymLinks );
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	list = d.entryInfoList();
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	for (int i = 0; i < list.size(); ++i) 
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	{
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		fi=list.at(i);
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		QFile (fi.filePath()).remove(); 
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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 copyDir (QDir src, QDir dst)
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{
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	system ("cp -r "+src.path()+"/* "+dst.path());
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	/*
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	ErrorCode err=success;
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	Process *cpProc=new Process ();
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	QStringList args;
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	cpProc->setWorkingDirectory (src.path());
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	args <<"-r";
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	args <<src.path();
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	args <<dst.path();
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	cpProc->start ("cp",args);
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	if (!cpProc->waitForStarted() )
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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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		cpProc->waitForFinished();
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		if (cpProc->exitStatus()!=QProcess::NormalExit )
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		{
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			QMessageBox::critical( 0, QObject::tr( "Critical Error" ),
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						   QObject::tr("cp didn't exit normally")+
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						   "\n" + cpProc->getErrout());
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			err=aborted;
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		} else
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		{
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			if (cpProc->exitCode()>0)
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			{
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				QMessageBox::critical( 0, QObject::tr( "Critical Error" ),
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						   QString("cp exit code:  %1").arg(cpProc->exitCode() )+
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						   "\n" + cpProc->getErrout() );
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				err=aborted;
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			}
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		}
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	}	// cp could be started
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	*/
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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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	QStringList args;
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	Process *zipProc=new Process ();
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	zipProc->setWorkingDirectory (zipDir.path());
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	args <<"-r";
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	args <<zipName;
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	args <<".";
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	zipProc->start ("zip",args);
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	if (!zipProc->waitForStarted() )
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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->waitForFinished();
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		if (zipProc->exitStatus()!=QProcess::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->exitCode()>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->exitCode() )+
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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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#if !defined(Q_OS_WIN32)
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	QStringList args;
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	Process *zipProc=new Process ();
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	zipProc->setWorkingDirectory (zipDir.path());
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	args << "-o";	// overwrite existing files!
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	args << zipName ;
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	args << "-d";
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	args << zipDir.path();
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	zipProc->start ("unzip",args);
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	if (!zipProc->waitForStarted() )
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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->waitForFinished();
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		if (zipProc->exitStatus()!=QProcess::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->exitCode()>0)
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			{
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				if (zipProc->exitCode()==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->exitCode() ) +
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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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#else
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    // Do this process creation using Win32 API.
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    //! Create process.
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    PROCESS_INFORMATION piProcInfo;
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    STARTUPINFO siStartInfo;
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    // Initialize members of the PROCESS_INFORMATION structure.
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    ::ZeroMemory( &piProcInfo, sizeof(PROCESS_INFORMATION) );
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    // Set up members of the STARTUPINFO structure.
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    ::ZeroMemory( &siStartInfo, sizeof(STARTUPINFO) );
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    siStartInfo.cb = sizeof(STARTUPINFO);
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    siStartInfo.dwFlags = STARTF_USESHOWWINDOW;
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    siStartInfo.wShowWindow = SW_MINIMIZE;
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    // Create command line.
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    QString argv("unzip -o ");
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    argv.append(QDir::convertSeparators(zipName));
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    argv.append(" -d ");
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    argv.append(QDir::convertSeparators(zipDir.path()));
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    // Create the child process.
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    if (!::CreateProcess(NULL, 
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                         (LPWSTR) argv.unicode(), // command line
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                         NULL, // process security attributes
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                         NULL, // primary thread security attributes
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                         TRUE, // handles are inherited
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                         0, // creation flags
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                         NULL, // use parent's environment
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                         NULL, // use parent's current directory
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                         &siStartInfo, // STARTUPINFO pointer
anng888@633
   376
                         &piProcInfo) ) // receives PROCESS_INFORMATION
insilmaril@606
   377
    {
anng888@633
   378
		QMessageBox::critical( 0, QObject::tr( "Critical Error" ),
anng888@633
   379
                               QObject::tr("Couldn't start unzip to decompress data."));
insilmaril@606
   380
        err = aborted;
insilmaril@606
   381
    }
insilmaril@606
   382
    else
insilmaril@606
   383
    {
insilmaril@606
   384
        // Wait for it to finish.
anng888@633
   385
        ::WaitForSingleObject( piProcInfo.hProcess, INFINITE );
anng888@633
   386
anng888@633
   387
        // Clean up handles.
anng888@633
   388
        CloseHandle(piProcInfo.hThread);
anng888@633
   389
        CloseHandle(piProcInfo.hProcess);
insilmaril@606
   390
    }
insilmaril@606
   391
#endif
anng888@633
   392
	return err;
insilmaril@195
   393
}
insilmaril@195
   394
insilmaril@195
   395
bool loadStringFromDisk (const QString &fname, QString &s)
insilmaril@195
   396
{
insilmaril@195
   397
	s="";
insilmaril@195
   398
	QFile file ( fname);
insilmaril@366
   399
	if ( !file.open( QIODevice::ReadOnly ) ) return false;
insilmaril@195
   400
insilmaril@195
   401
	QTextStream ts( &file );
insilmaril@195
   402
	ts.setEncoding (QTextStream::UnicodeUTF8);
insilmaril@195
   403
	while ( !ts.atEnd() ) 
insilmaril@195
   404
		s+=ts.readLine()+"\n"; 
insilmaril@195
   405
	file.close();
insilmaril@195
   406
	return true;
insilmaril@195
   407
}
insilmaril@195
   408
insilmaril@195
   409
bool saveStringToDisk (const QString &fname, const QString &s)
insilmaril@195
   410
{
insilmaril@195
   411
	QFile file( fname);
insilmaril@195
   412
insilmaril@195
   413
	file.setName ( fname);
insilmaril@366
   414
	if ( !file.open( QIODevice::WriteOnly ) ) 
insilmaril@195
   415
	{
insilmaril@195
   416
		file.close();
insilmaril@195
   417
		return false;
insilmaril@195
   418
	}	
insilmaril@195
   419
insilmaril@195
   420
	// Write it finally, and write in UTF8, no matter what 
insilmaril@195
   421
	QTextStream ts( &file );
insilmaril@195
   422
	ts.setEncoding (QTextStream::UnicodeUTF8);
insilmaril@195
   423
	ts << s;
insilmaril@195
   424
	file.close();
insilmaril@195
   425
	return true;
insilmaril@195
   426
}
insilmaril@195
   427
insilmaril@195
   428
insilmaril@234
   429
ImagePreview::ImagePreview (QWidget *par=0): QLabel (par)
insilmaril@195
   430
{
insilmaril@366
   431
	fdia=(Q3FileDialog*)par;
insilmaril@195
   432
}
insilmaril@195
   433
insilmaril@366
   434
void ImagePreview::previewUrl( const Q3Url &u )
insilmaril@195
   435
{
insilmaril@195
   436
    QString path = u.path();
insilmaril@195
   437
    QPixmap pix( path );
insilmaril@195
   438
    if ( pix.isNull() )
insilmaril@234
   439
	{
insilmaril@234
   440
		// Strange: If we have fd->setMode (QFileDialog::ExistingFiles)
insilmaril@234
   441
		// in the filedialog, then there are 3 calls to previewURL 
insilmaril@234
   442
		// for each selection. And only the first is the actual selected file
insilmaril@234
   443
		// while the following 2 point to the directory above the current one.
insilmaril@234
   444
		// So here's my workaround:
insilmaril@234
   445
		
insilmaril@234
   446
		if (fdia && fdia->selectedFiles().count()==0)
insilmaril@234
   447
			setText( QObject::tr("This is not an image.") );
insilmaril@234
   448
		if (fdia &&fdia->selectedFiles().count()>1)
insilmaril@234
   449
			setText( QObject::tr("Sorry, no preview for\nmultiple selected files.") );
insilmaril@234
   450
	}	
insilmaril@195
   451
    else
insilmaril@195
   452
	{
insilmaril@195
   453
		float max_w=300;
insilmaril@195
   454
		float max_h=300;
insilmaril@195
   455
		float r;
insilmaril@195
   456
		if (pix.width()>max_w)
insilmaril@195
   457
		{
insilmaril@195
   458
			r=max_w / pix.width();
insilmaril@195
   459
			pix.resize(qRound(pix.width()*r), qRound(pix.height()*r));
insilmaril@412
   460
			// TODO not a resize, but a shrink/enlarge is needed here...
insilmaril@195
   461
		}
insilmaril@195
   462
		if (pix.height()>max_h)
insilmaril@195
   463
		{
insilmaril@195
   464
			r=max_h / pix.height();
insilmaril@195
   465
			pix.resize(qRound(pix.width()*r), qRound(pix.height()*r));
insilmaril@412
   466
			// TODO not a resize, but a shrink/enlarge is needed here...
insilmaril@195
   467
		}
insilmaril@195
   468
        setPixmap( pix );
insilmaril@195
   469
	}	
insilmaril@195
   470
}
insilmaril@195
   471
insilmaril@366
   472
ImageIO::ImageIO ()
insilmaril@366
   473
{
insilmaril@366
   474
	// Create list with supported image types
insilmaril@366
   475
	// foreach (QByteArray format, QImageWriter::supportedImageFormats()) 
insilmaril@366
   476
	// imageTypes.append( tr("%1...").arg(QString(format).toUpper()));
insilmaril@366
   477
	imageFilters.append ("Images (*.png *.jpg *.jpeg *.bmp *.bmp *.ppm *.xpm *.xbm)");
insilmaril@366
   478
	imageTypes.append ("PNG");
insilmaril@366
   479
	imageFilters.append ("Portable Network Graphics (*.png)");
insilmaril@366
   480
	imageTypes.append ("PNG");
insilmaril@366
   481
	imageFilters.append ("Joint Photographic Experts Group (*.jpg)");
insilmaril@366
   482
	imageTypes.append ("JPG");
insilmaril@366
   483
	imageFilters.append ("Joint Photographic Experts Group (*.jpeg)");
insilmaril@366
   484
	imageTypes.append ("JPG");
insilmaril@366
   485
	imageFilters.append ("Windows Bitmap (*.bmp)");
insilmaril@366
   486
	imageTypes.append ("BMP");
insilmaril@366
   487
	imageFilters.append ("Portable Pixmap (*.ppm)");
insilmaril@366
   488
	imageTypes.append ("PPM");
insilmaril@366
   489
	imageFilters.append ("X11 Bitmap (*.xpm)");
insilmaril@366
   490
	imageTypes.append ("XPM");
insilmaril@366
   491
	imageFilters.append ("X11 Bitmap (*.xbm)");
insilmaril@366
   492
	imageTypes.append ("XBM");
insilmaril@366
   493
}
insilmaril@366
   494
insilmaril@366
   495
QStringList ImageIO::getFilters()
insilmaril@366
   496
{
insilmaril@366
   497
	return imageFilters;
insilmaril@366
   498
}
insilmaril@366
   499
insilmaril@366
   500
QString ImageIO::getType(QString filter)
insilmaril@366
   501
{
insilmaril@366
   502
	for (int i=0;i<imageFilters.count()+1;i++)
insilmaril@366
   503
		if (imageFilters.at(i)==filter) return imageTypes.at(i);
insilmaril@366
   504
	return QString();	
insilmaril@366
   505
}