/
qgsgrass.cpp
2132 lines (1819 loc) · 58.2 KB
/
qgsgrass.cpp
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/***************************************************************************
qgsgrass.cpp - Data provider for GRASS format
-------------------
begin : March, 2004
copyright : (C) 2004 by Radim Blazek
email : blazek@itc.it
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#ifdef _MSC_VER
// to avoid conflicting SF_UNKNOWN
#define _OLE2_H_
#endif
#include <setjmp.h>
#include "qgsgrass.h"
#include "qgslogger.h"
#include "qgsapplication.h"
#include "qgscoordinatereferencesystem.h"
#include "qgsfield.h"
#include "qgsrectangle.h"
#include "qgsconfig.h"
#include <QFileDialog>
#include <QMessageBox>
#include <QProcess>
#include <QSettings>
#include <QTextStream>
#include <QTemporaryFile>
#include <QHash>
#include <QTextCodec>
extern "C"
{
#ifndef _MSC_VER
#include <unistd.h>
#endif
#include <grass/version.h>
#include <grass/gprojects.h>
#if GRASS_VERSION_MAJOR < 7
#include <grass/Vect.h>
#else
#include <grass/vector.h>
#include <grass/raster.h>
#endif
}
#if !defined(GRASS_VERSION_MAJOR) || \
!defined(GRASS_VERSION_MINOR) || \
GRASS_VERSION_MAJOR<6 || \
(GRASS_VERSION_MAJOR == 6 && GRASS_VERSION_MINOR <= 2)
#define G__setenv(name,value) G__setenv( ( char * ) (name), (char *) (value) )
#endif
#define GRASS_LOCK sMutex.lock();
#define GRASS_UNLOCK sMutex.unlock();
QgsGrassObject::QgsGrassObject( const QString& gisdbase, const QString& location,
const QString& mapset, const QString& name, Type type ) :
mGisdbase( gisdbase )
, mLocation( location )
, mMapset( mapset )
, mName( name )
, mType( type )
{
}
bool QgsGrassObject::setFromUri( const QString& uri )
{
QgsDebugMsg( "uri = " + uri );
QFileInfo fi( uri );
if ( fi.isFile() )
{
QString path = fi.canonicalFilePath();
QgsDebugMsg( "path = " + path );
// /gisdbase_path/location/mapset/cellhd/raster_map
QRegExp rx( "(.*)/([^/]*)/([^/]*)/cellhd/([^/]*)", Qt::CaseInsensitive );
if ( rx.indexIn( path ) > -1 )
{
mGisdbase = rx.cap( 1 );
mLocation = rx.cap( 2 );
mMapset = rx.cap( 3 );
mName = rx.cap( 4 );
mType = Raster;
return QgsGrass::isLocation( mGisdbase + "/" + mLocation );
}
}
else
{
// /gisdbase_path/location/mapset/vector_map/layer
// QFileInfo.canonicalPath() on non existing file does not work (returns empty string)
// QFileInfo.absolutePath() does not necessarily remove symbolic links or redundant "." or ".."
QDir dir = fi.dir(); // .../mapset/vector_map - does not exist
if ( dir.cdUp() ) // .../mapset/
{
QString path = dir.canonicalPath();
QRegExp rx( "(.*)/([^/]*)/([^/]*)" );
if ( rx.indexIn( path ) > -1 )
{
mGisdbase = rx.cap( 1 );
mLocation = rx.cap( 2 );
mMapset = rx.cap( 3 );
mName = fi.dir().dirName();
mType = Vector;
QgsDebugMsg( "parsed : " + toString() );
return QgsGrass::isLocation( mGisdbase + "/" + mLocation );
}
}
}
return false;
}
QString QgsGrassObject::elementShort() const
{
if ( mType == Raster )
return "rast";
else if ( mType == Vector )
return "vect";
else if ( mType == Region )
return "region";
else
return "";
}
QString QgsGrassObject::elementName() const
{
return elementName( mType );
}
QString QgsGrassObject::elementName( Type type )
{
if ( type == Raster )
return "raster";
else if ( type == Vector )
return "vector";
else if ( type == Region )
return "region";
else
return "";
}
QString QgsGrassObject::dirName() const
{
return dirName( mType );
}
QString QgsGrassObject::dirName( Type type )
{
if ( type == Raster )
return "cellhd";
else if ( type == Vector )
return "vector";
else if ( type == Region )
return "windows";
else
return "";
}
QString QgsGrassObject::toString() const
{
return elementName() + " : " + mapsetPath() + " : " + mName;
}
bool QgsGrassObject::locationIdentical( const QgsGrassObject &other ) const
{
QFileInfo fi( locationPath() );
QFileInfo otherFi( other.locationPath() );
return fi == otherFi;
}
bool QgsGrassObject::mapsetIdentical( const QgsGrassObject &other ) const
{
QFileInfo fi( mapsetPath() );
QFileInfo otherFi( other.mapsetPath() );
return fi == otherFi;
}
QRegExp QgsGrassObject::newNameRegExp( Type type )
{
QRegExp rx;
if ( type == QgsGrassObject::Vector )
{
rx.setPattern( "[A-Za-z_][A-Za-z0-9_]+" );
}
else
{
rx.setPattern( "[A-Za-z0-9_.]+" );
}
return rx;
}
#ifdef Q_OS_WIN
#include <windows.h>
QString GRASS_LIB_EXPORT QgsGrass::shortPath( const QString &path )
{
TCHAR buf[MAX_PATH];
int len = GetShortPathName( path.toUtf8().constData(), buf, MAX_PATH );
if ( len == 0 || len > MAX_PATH )
{
QgsDebugMsg( QString( "GetShortPathName('%1') failed with %2: %3" )
.arg( path ).arg( len ).arg( GetLastError() ) );
return path;
}
QString res = QString::fromUtf8( buf );
// GRASS wxpyton GUI fails on paths with backslash, Windows do support forward slashesin paths
res.replace( "\\", "/" );
return res;
}
#endif
void GRASS_LIB_EXPORT QgsGrass::init( void )
{
// Warning!!!
// G_set_error_routine() once called from plugin
// is not valid in provider -> call it always
// Set error function
G_set_error_routine( &error_routine );
if ( initialized )
return;
QSettings settings;
// Is it active mode ?
active = false;
if ( getenv( "GISRC" ) )
{
G_TRY
{
// Store default values
defaultGisdbase = G_gisdbase();
defaultLocation = G_location();
defaultMapset = G_mapset();
active = true;
}
G_CATCH( QgsGrass::Exception &e )
{
QgsDebugMsg( QString( "GISRC set but cannot get gisdbase/location/mapset: %1" ).arg( e.what() ) );
}
}
// Don't use GISRC file and read/write GRASS variables (from location G_VAR_GISRC) to memory only.
G_set_gisrc_mode( G_GISRC_MODE_MEMORY );
// Init GRASS libraries (required)
G_no_gisinit(); // Doesn't check write permissions for mapset compare to G_gisinit("libgrass++");
// I think that mask should not be used in QGIS as it can only confuses people,
// anyway, I don't think anybody is using MASK
// TODO7: Rast_suppress_masking (see G_suppress_masking() macro above) needs MAPSET
#if GRASS_VERSION_MAJOR < 7
G_suppress_masking();
#endif
// Set program name
G_set_program_name( "QGIS" );
// Require GISBASE to be set. This should point to the location of
// the GRASS installation. The GRASS libraries use it to know
// where to look for things.
// Look first to see if GISBASE env var is already set.
// This is set when QGIS is run from within GRASS
// or when set explicitly by the user.
// This value should always take precedence.
#ifdef Q_OS_WIN
QString gisBase = getenv( "WINGISBASE" ) ? getenv( "WINGISBASE" ) : getenv( "GISBASE" );
gisBase = shortPath( gisBase );
#else
QString gisBase = getenv( "GISBASE" );
#endif
QgsDebugMsg( QString( "GRASS gisBase from GISBASE env var is: %1" ).arg( gisBase ) );
if ( !isValidGrassBaseDir( gisBase ) )
{
// Look for gisbase in QSettings
gisBase = settings.value( "/GRASS/gisbase", "" ).toString();
QgsDebugMsg( QString( "GRASS gisBase from QSettings is: %1" ).arg( gisBase ) );
}
if ( !isValidGrassBaseDir( gisBase ) )
{
// Erase gisbase from settings because it does not exists
settings.setValue( "/GRASS/gisbase", "" );
#ifdef Q_OS_WIN
// Use the applicationDirPath()/grass
gisBase = shortPath( QCoreApplication::applicationDirPath() + "/grass" );
QgsDebugMsg( QString( "GRASS gisBase = %1" ).arg( gisBase ) );
#elif defined(Q_OS_MACX)
// check for bundled GRASS, fall back to configured path
gisBase = QCoreApplication::applicationDirPath().append( "/grass" );
if ( !isValidGrassBaseDir( gisBase ) )
{
gisBase = GRASS_BASE;
}
QgsDebugMsg( QString( "GRASS gisBase = %1" ).arg( gisBase ) );
#else
// Use the location specified --with-grass during configure
gisBase = GRASS_BASE;
QgsDebugMsg( QString( "GRASS gisBase from configure is: %1" ).arg( gisBase ) );
#endif
}
bool userGisbase = false;
bool valid = false;
while ( !( valid = isValidGrassBaseDir( gisBase ) ) )
{
// ask user if he wants to specify GISBASE
QMessageBox::StandardButton res = QMessageBox::warning( 0, QObject::tr( "GRASS plugin" ),
QObject::tr( "QGIS couldn't find your GRASS installation.\n"
"Would you like to specify path (GISBASE) to your GRASS installation?" ),
QMessageBox::Ok | QMessageBox::Cancel );
if ( res != QMessageBox::Ok )
{
userGisbase = false;
break;
}
// XXX Need to subclass this and add explantory message above to left side
userGisbase = true;
// For Mac, GISBASE folder may be inside GRASS bundle. Use Qt file dialog
// since Mac native dialog doesn't allow user to browse inside bundles.
gisBase = QFileDialog::getExistingDirectory(
0, QObject::tr( "Choose GRASS installation path (GISBASE)" ), gisBase,
QFileDialog::DontUseNativeDialog );
if ( gisBase == QString::null )
{
// User pressed cancel. No GRASS for you!
userGisbase = false;
break;
}
#ifdef Q_OS_WIN32
gisBase = shortPath( gisBase );
#endif
}
if ( !valid )
{
// warn user
QMessageBox::information( 0, QObject::tr( "GRASS plugin" ),
QObject::tr( "GRASS data won't be available if GISBASE is not specified." ) );
}
if ( userGisbase )
{
settings.setValue( "/GRASS/gisbase", gisBase );
}
QgsDebugMsg( QString( "Valid GRASS gisBase is: %1" ).arg( gisBase ) );
putEnv( "GISBASE", gisBase );
// Add path to GRASS modules
#ifdef Q_OS_WIN
QString sep = ";";
#else
QString sep = ":";
#endif
QString path = gisBase + "/bin";
path.append( sep + gisBase + "/scripts" );
path.append( sep + QgsApplication::pkgDataPath() + "/grass/scripts/" );
// On windows the GRASS libraries are in
// QgsApplication::prefixPath(), we have to add them
// to PATH to enable running of GRASS modules
// and database drivers
#ifdef Q_OS_WIN
// It seems that QgsApplication::prefixPath()
// is not initialized at this point
path.append( sep + shortPath( QCoreApplication::applicationDirPath() ) );
// Add path to MSYS bin
// Warning: MSYS sh.exe will translate this path to '/bin'
if ( QFileInfo( QCoreApplication::applicationDirPath() + "/msys/bin/" ).isDir() )
path.append( sep + shortPath( QCoreApplication::applicationDirPath() + "/msys/bin/" ) );
#endif
QString p = getenv( "PATH" );
path.append( sep + p );
QgsDebugMsg( QString( "set PATH: %1" ).arg( path ) );
putEnv( "PATH", path );
// Set PYTHONPATH
QString pythonpath = gisBase + "/etc/python";
QString pp = getenv( "PYTHONPATH" );
pythonpath.append( sep + pp );
QgsDebugMsg( QString( "set PYTHONPATH: %1" ).arg( pythonpath ) );
putEnv( "PYTHONPATH", pythonpath );
// Set GRASS_PAGER if not set, it is necessary for some
// modules printing to terminal, e.g. g.list
// We use 'cat' because 'more' is not present in MSYS (Win)
// and it doesn't work well in built in shell (Unix/Mac)
// and 'less' is not user friendly (for example user must press
// 'q' to quit which is definitely difficult for normal user)
// Also scroling can be don in scrollable window in both
// MSYS terminal and built in shell.
if ( !getenv( "GRASS_PAGER" ) )
{
QString pager;
QStringList pagers;
//pagers << "more" << "less" << "cat"; // se notes above
pagers << "cat";
for ( int i = 0; i < pagers.size(); i++ )
{
int state;
QProcess p;
p.start( pagers.at( i ) );
p.waitForStarted();
state = p.state();
p.write( "\004" ); // Ctrl-D
p.closeWriteChannel();
p.waitForFinished( 1000 );
p.kill();
if ( state == QProcess::Running )
{
pager = pagers.at( i );
break;
}
}
if ( pager.length() > 0 )
{
putEnv( "GRASS_PAGER", pager );
}
}
initialized = 1;
}
/*
* Check if given directory contains a GRASS installation
*/
bool QgsGrass::isValidGrassBaseDir( const QString& gisBase )
{
QgsDebugMsg( "isValidGrassBaseDir()" );
// GRASS currently doesn't handle paths with blanks
if ( gisBase.isEmpty() || gisBase.contains( " " ) )
{
return false;
}
/* TODO: G_is_gisbase() was added to GRASS 6.1 06-05-24,
enable its use after some period (others do update) */
#if 0
if ( QgsGrass::versionMajor() > 6 || QgsGrass::versionMinor() > 0 )
{
if ( G_is_gisbase( gisBase.toUtf8().constData() ) )
return true;
}
else
{
#endif
QFileInfo gbi( gisBase + "/etc/element_list" );
if ( gbi.exists() )
return true;
#if 0
}
#endif
return false;
}
bool QgsGrass::activeMode()
{
init();
return active;
}
QString QgsGrass::getDefaultGisdbase()
{
init();
return defaultGisdbase;
}
QString QgsGrass::getDefaultLocation()
{
init();
return defaultLocation;
}
QString QgsGrass::getDefaultMapset()
{
init();
return defaultMapset;
}
void QgsGrass::setLocation( QString gisdbase, QString location )
{
QgsDebugMsg( QString( "gisdbase = %1 location = %2" ).arg( gisdbase ).arg( location ) );
setMapset( gisdbase, location, "PERMANENT" );
}
void QgsGrass::setMapset( QString gisdbase, QString location, QString mapset )
{
QgsDebugMsg( QString( "gisdbase = %1 location = %2 mapset = %3" ).arg( gisdbase ).arg( location ).arg( mapset ) );
init();
// Set principal GRASS variables (in memory)
#ifdef Q_OS_WIN
G__setenv( "GISDBASE", shortPath( gisdbase ).toUtf8().data() );
#else
G__setenv( "GISDBASE", gisdbase.toUtf8().data() );
#endif
G__setenv( "LOCATION_NAME", location.toUtf8().data() );
G__setenv( "MAPSET", mapset.toUtf8().data() );
// Add all available mapsets to search path
char **ms = 0;
G_TRY
{
ms = G_available_mapsets();
}
G_CATCH( QgsGrass::Exception &e )
{
Q_UNUSED( e );
QgsDebugMsg( QString( "No available mapsets found: %1" ).arg( e.what() ) );
return;
}
for ( int i = 0; ms[i]; i++ )
G_add_mapset_to_search_path( ms[i] );
}
jmp_buf QgsGrass::jumper;
int QgsGrass::initialized = 0;
bool QgsGrass::active = 0;
QgsGrass::GERROR QgsGrass::lastError = QgsGrass::OK;
QString QgsGrass::error_message;
QString QgsGrass::defaultGisdbase;
QString QgsGrass::defaultLocation;
QString QgsGrass::defaultMapset;
QString QgsGrass::mMapsetLock;
QString QgsGrass::mGisrc;
QString QgsGrass::mTmp;
QMutex QgsGrass::sMutex;
int QgsGrass::error_routine( char *msg, int fatal )
{
return error_routine(( const char* ) msg, fatal );
}
int QgsGrass::error_routine( const char *msg, int fatal )
{
// G_fatal_error obviously is not thread safe (everything static in GRASS, especially fatal_jmp_buf)
// it means that anything which may end up with G_fatal_error must use mutex
// Unfortunately the exceptions thrown here can only be caught if GRASS libraries are compiled
// with -fexception option on Linux (works on Windows)
// GRASS developers are reluctant to add -fexception by default
// https://trac.osgeo.org/grass/ticket/869
QgsDebugMsg( QString( "error_routine (fatal = %1): %2" ).arg( fatal ).arg( msg ) );
error_message = msg;
if ( fatal )
{
QgsDebugMsg( "fatal -> longjmp" );
// Exceptions cannot be thrown from here if GRASS lib is not compiled with -fexceptions
//throw QgsGrass::Exception( QString::fromUtf8( msg ) );
lastError = FATAL;
#if (GRASS_VERSION_MAJOR < 7)
// longjump() is called by G_fatal_error in GRASS >= 7
longjmp( QgsGrass::jumper, 1 );
#endif
}
else
{
lastError = WARNING;
}
return 1;
}
void GRASS_LIB_EXPORT QgsGrass::resetError( void )
{
lastError = OK;
}
int GRASS_LIB_EXPORT QgsGrass::error( void )
{
return lastError;
}
QString GRASS_LIB_EXPORT QgsGrass::errorMessage( void )
{
return error_message;
}
QString GRASS_LIB_EXPORT QgsGrass::openMapset( const QString& gisdbase,
const QString& location, const QString& mapset )
{
QgsDebugMsg( QString( "gisdbase = %1" ).arg( gisdbase.toUtf8().constData() ) );
QgsDebugMsg( QString( "location = %1" ).arg( location.toUtf8().constData() ) );
QgsDebugMsg( QString( "mapset = %1" ).arg( mapset.toUtf8().constData() ) );
closeMapset(); // close currently opened mapset (if any)
QString mapsetPath = gisdbase + "/" + location + "/" + mapset;
// Check if the mapset is in use
QString gisBase = getenv( "GISBASE" );
if ( gisBase.isEmpty() )
return QObject::tr( "GISBASE is not set." );
QFileInfo fi( mapsetPath + "/WIND" );
if ( !fi.exists() )
{
return QObject::tr( "%1 is not a GRASS mapset." ).arg( mapsetPath );
}
QString lock = mapsetPath + "/.gislock";
#ifndef _MSC_VER
int pid = getpid();
#else
int pid = GetCurrentProcessId();
#endif
QgsDebugMsg( QString( "pid = %1" ).arg( pid ) );
#ifndef Q_OS_WIN
QFile lockFile( lock );
QProcess process;
QString lockProgram( gisBase + "/etc/lock" );
QStringList lockArguments;
lockArguments << lock << QString::number( pid );
QString lockCommand = lockProgram + " " + lockArguments.join( " " ); // for debug
QgsDebugMsg( "lock command: " + lockCommand );
process.start( lockProgram, lockArguments );
if ( !process.waitForStarted( 5000 ) )
{
return QObject::tr( "Cannot start %1" ).arg( lockCommand );
}
process.waitForFinished( 5000 );
QString processResult = QString( "exitStatus=%1, exitCode=%2, errorCode=%3, error=%4 stdout=%5, stderr=%6" )
.arg( process.exitStatus() ).arg( process.exitCode() )
.arg( process.error() ).arg( process.errorString() )
.arg( process.readAllStandardOutput().data() ).arg( process.readAllStandardError().data() );
QgsDebugMsg( "processResult: " + processResult );
// lock exit code:
// 0 - ok
// 1 - error
// 2 - mapset in use
if ( process.exitCode() == 2 )
{
return QObject::tr( "Mapset is already in use." );
}
if ( process.exitStatus() != QProcess::NormalExit || process.exitCode() != 0 )
{
QString message = QObject::tr( "Mapset lock failed" ) + " (" + processResult + ")";
return message;
}
#endif // Q_OS_WIN
// Create temporary directory
QFileInfo info( mapsetPath );
QString user = info.owner();
mTmp = QDir::tempPath() + "/grass6-" + user + "-" + QString::number( pid );
QDir dir( mTmp );
if ( dir.exists() )
{
QFileInfo dirInfo( mTmp );
if ( !dirInfo.isWritable() )
{
#ifndef Q_OS_WIN
lockFile.remove();
#endif
return QObject::tr( "Temporary directory %1 exists but is not writable" ).arg( mTmp );
}
}
else if ( !dir.mkdir( mTmp ) )
{
#ifndef Q_OS_WIN
lockFile.remove();
#endif
return QObject::tr( "Cannot create temporary directory %1" ).arg( mTmp );
}
// Create GISRC file
QString globalGisrc = QDir::home().path() + "/.grassrc6";
mGisrc = mTmp + "/gisrc";
QgsDebugMsg( QString( "globalGisrc = %1" ).arg( globalGisrc ) );
QgsDebugMsg( QString( "mGisrc = %1" ).arg( mGisrc ) );
QFile out( mGisrc );
if ( !out.open( QIODevice::WriteOnly ) )
{
#ifndef Q_OS_WIN
lockFile.remove();
#endif
return QObject::tr( "Cannot create %1" ).arg( mGisrc );
}
QTextStream stream( &out );
QFile in( globalGisrc );
QString line;
bool guiSet = false;
char buf[1000];
if ( in.open( QIODevice::ReadOnly ) )
{
while ( in.readLine( buf, 1000 ) != -1 )
{
line = buf;
if ( line.contains( "GISDBASE:" ) ||
line.contains( "LOCATION_NAME:" ) ||
line.contains( "MAPSET:" ) )
{
continue;
}
if ( line.contains( "GRASS_GUI:" ) )
guiSet = true;
stream << line;
}
in.close();
}
line = "GISDBASE: " + gisdbase + "\n";
stream << line;
line = "LOCATION_NAME: " + location + "\n";
stream << line;
line = "MAPSET: " + mapset + "\n";
stream << line;
if ( !guiSet )
{
stream << "GRASS_GUI: wxpython\n";
}
out.close();
// Set GISRC environment variable
/* _Correct_ putenv() implementation is not making copy! */
putEnv( "GISRC", mGisrc );
// Reinitialize GRASS
G__setenv( "GISRC", mGisrc.toUtf8().data() );
#ifdef Q_OS_WIN
G__setenv( "GISDBASE", shortPath( gisdbase ).toLocal8Bit().data() );
#else
G__setenv( "GISDBASE", gisdbase.toUtf8().data() );
#endif
G__setenv( "LOCATION_NAME", location.toLocal8Bit().data() );
G__setenv( "MAPSET", mapset.toLocal8Bit().data() );
defaultGisdbase = gisdbase;
defaultLocation = location;
defaultMapset = mapset;
active = true;
// closeMapset() added at the beginning
#if 0
#ifndef Q_OS_WIN
// Close old mapset
if ( mMapsetLock.length() > 0 )
{
QFile file( mMapsetLock );
file.remove();
}
#endif
#endif
mMapsetLock = lock;
return NULL;
}
QString QgsGrass::closeMapset()
{
QgsDebugMsg( "entered." );
if ( mMapsetLock.length() > 0 )
{
#ifndef Q_OS_WIN
QFile file( mMapsetLock );
if ( !file.remove() )
{
return QObject::tr( "Cannot remove mapset lock: %1" ).arg( mMapsetLock );
}
#endif
mMapsetLock = "";
putenv(( char * ) "GISRC" );
// Reinitialize GRASS
G__setenv( "GISRC", ( char * ) "" );
// Temporarily commented because of
// http://trac.osgeo.org/qgis/ticket/1900
// http://trac.osgeo.org/gdal/ticket/3313
// it can be uncommented once GDAL with patch gets deployed (probably GDAL 1.8)
//G__setenv( "GISDBASE", ( char * ) "" );
//G__setenv( "LOCATION_NAME", ( char * ) "" );
//G__setenv( "MAPSET", ( char * ) "" );
defaultGisdbase = "";
defaultLocation = "";
defaultMapset = "";
active = 0;
// Delete temporary dir
// To be sure that we don't delete '/' for example
if ( mTmp.left( 4 ) == "/tmp" )
{
QDir dir( mTmp );
for ( unsigned int i = 0; i < dir.count(); i++ )
{
if ( dir[i] == "." || dir[i] == ".." )
continue;
dir.remove( dir[i] );
if ( dir.remove( dir[i] ) )
{
QgsDebugMsg( QString( "Cannot remove temporary file %1" ).arg( dir[i] ) );
}
}
if ( !dir.rmdir( mTmp ) )
{
QgsDebugMsg( QString( "Cannot remove temporary directory %1" ).arg( mTmp ) );
}
}
}
return NULL;
}
QStringList GRASS_LIB_EXPORT QgsGrass::locations( const QString& gisdbase )
{
QgsDebugMsg( QString( "gisdbase = %1" ).arg( gisdbase ) );
QStringList list;
if ( gisdbase.isEmpty() )
return list;
QDir d = QDir( gisdbase );
d.setFilter( QDir::NoDotAndDotDot | QDir::Dirs );
for ( unsigned int i = 0; i < d.count(); i++ )
{
if ( QFile::exists( gisdbase + "/" + d[i]
+ "/PERMANENT/DEFAULT_WIND" ) )
{
list.append( QString( d[i] ) );
}
}
return list;
}
QStringList GRASS_LIB_EXPORT QgsGrass::mapsets( const QString& gisdbase, const QString& locationName )
{
QgsDebugMsg( QString( "gisbase = %1 locationName = %2" ).arg( gisdbase ).arg( locationName ) );
if ( gisdbase.isEmpty() || locationName.isEmpty() )
return QStringList();
return QgsGrass::mapsets( gisdbase + "/" + locationName );
}
QStringList GRASS_LIB_EXPORT QgsGrass::mapsets( const QString& locationPath )
{
QgsDebugMsg( QString( "locationPath = %1" ).arg( locationPath ) );
QStringList list;
if ( locationPath.isEmpty() )
return list;
QDir d = QDir( locationPath );
d.setFilter( QDir::NoDotAndDotDot | QDir::Dirs );
for ( unsigned int i = 0; i < d.count(); i++ )
{
if ( QFile::exists( locationPath + "/" + d[i] + "/WIND" ) )
{
list.append( d[i] );
}
}
return list;
}
QStringList GRASS_LIB_EXPORT QgsGrass::vectors( const QString& gisdbase, const QString& locationName,
const QString& mapsetName )
{
QgsDebugMsg( "entered." );
if ( gisdbase.isEmpty() || locationName.isEmpty() || mapsetName.isEmpty() )
return QStringList();
/* TODO: G_list() was added to GRASS 6.1 06-05-24,
enable its use after some period (others do update) */
/*
if ( QgsGrass::versionMajor() > 6 || QgsGrass::versionMinor() > 0 )
{
QStringList list;
char **glist = G_list( G_ELEMENT_VECTOR,
gisbase.toUtf8().constData(),
locationName.toUtf8().constData(),
mapsetName.toUtf8().constData() );
int i = 0;
while ( glist[i] )
{
list.append( QString(glist[i]) );
i++;
}
G_free_list ( glist );
return list;
}
*/
return QgsGrass::vectors( gisdbase + "/" + locationName + "/" + mapsetName );
}
QStringList GRASS_LIB_EXPORT QgsGrass::vectors( const QString& mapsetPath )
{
QgsDebugMsg( QString( "mapsetPath = %1" ).arg( mapsetPath ) );
QStringList list;
if ( mapsetPath.isEmpty() )
return list;
QDir d = QDir( mapsetPath + "/vector" );
d.setFilter( QDir::NoDotAndDotDot | QDir::Dirs );
for ( unsigned int i = 0; i < d.count(); i++ )
{
/*
if ( QFile::exists ( mapsetPath + "/vector/" + d[i] + "/head" ) )
{
list.append(d[i]);
}
*/
list.append( d[i] );
}
return list;
}
QStringList GRASS_LIB_EXPORT QgsGrass::vectorLayers( const QString& gisdbase, const QString& location,
const QString& mapset, const QString& mapName )
{
GRASS_LOCK
QgsDebugMsg( QString( "gisdbase = %1 location = %2 mapset = %3 mapName = %4" ).arg( gisdbase ).arg( location ).arg( mapset ).arg( mapName ) );
QStringList list;
// Set location
QgsGrass::setLocation( gisdbase, location );
/* Open vector */
QgsGrass::resetError();
//Vect_set_open_level( 2 );
struct Map_info map;
int level = -1;
// Vect_open_old_head GRASS is raising fatal error if topo exists but it is in different (older) version.
// It means that even we could open it on level one, it ends with exception,
// but we need level 2 anyway to get list of layers, so it does not matter, only the error message may be misleading.
G_TRY
{
level = Vect_open_old_head( &map, ( char * ) mapName.toUtf8().data(), ( char * ) mapset.toUtf8().data() );