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qgsproject.cpp
2373 lines (1928 loc) · 67 KB
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qgsproject.cpp
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/***************************************************************************
qgsproject.cpp - description
-------------------
begin : July 23, 2004
copyright : (C) 2004 by Mark Coletti
email : mcoletti at gmail.com
***************************************************************************/
/***************************************************************************
* *
* 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. *
* *
***************************************************************************/
#include "qgsproject.h"
#include "qgsdatasourceuri.h"
#include "qgsexception.h"
#include "qgslayertree.h"
#include "qgslayertreeutils.h"
#include "qgslayertreeregistrybridge.h"
#include "qgslogger.h"
#include "qgsmessagelog.h"
#include "qgspluginlayer.h"
#include "qgspluginlayerregistry.h"
#include "qgsprojectfiletransform.h"
#include "qgssnappingconfig.h"
#include "qgsprojectversion.h"
#include "qgsrasterlayer.h"
#include "qgsrectangle.h"
#include "qgsrelationmanager.h"
#include "qgsvectorlayer.h"
#include "qgsmapthemecollection.h"
#include "qgslayerdefinition.h"
#include "qgsunittypes.h"
#include "qgstransaction.h"
#include "qgstransactiongroup.h"
#include "qgsvectordataprovider.h"
#include "qgsprojectbadlayerhandler.h"
#include <QApplication>
#include <QFileInfo>
#include <QDomNode>
#include <QObject>
#include <QTextStream>
#include <QTemporaryFile>
#include <QDir>
#include <QUrl>
#include <QSettings>
#ifdef Q_OS_UNIX
#include <utime.h>
#elif _MSC_VER
#include <sys/utime.h>
#endif
// canonical project instance
QgsProject *QgsProject::sProject = nullptr;
/**
Take the given scope and key and convert them to a string list of key
tokens that will be used to navigate through a Property hierarchy
E.g., scope "someplugin" and key "/foo/bar/baz" will become a string list
of { "properties", "someplugin", "foo", "bar", "baz" }. "properties" is
always first because that's the permanent ``root'' Property node.
*/
QStringList makeKeyTokens_( const QString& scope, const QString& key )
{
QStringList keyTokens = QStringList( scope );
keyTokens += key.split( '/', QString::SkipEmptyParts );
// be sure to include the canonical root node
keyTokens.push_front( QStringLiteral( "properties" ) );
//check validy of keys since an unvalid xml name will will be dropped upon saving the xml file. If not valid, we print a message to the console.
for ( int i = 0; i < keyTokens.size(); ++i )
{
QString keyToken = keyTokens.at( i );
//invalid chars in XML are found at http://www.w3.org/TR/REC-xml/#NT-NameChar
//note : it seems \x10000-\xEFFFF is valid, but it when added to the regexp, a lot of unwanted characters remain
QString nameCharRegexp = QStringLiteral( "[^:A-Z_a-z\\xC0-\\xD6\\xD8-\\xF6\\xF8-\\x2FF\\x370-\\x37D\\x37F-\\x1FFF\\x200C-\\x200D\\x2070-\\x218F\\x2C00-\\x2FEF\\x3001-\\xD7FF\\xF900-\\xFDCF\\xFDF0-\\xFFFD\\-\\.0-9\\xB7\\x0300-\\x036F\\x203F-\\x2040]" );
QString nameStartCharRegexp = QStringLiteral( "^[^:A-Z_a-z\\xC0-\\xD6\\xD8-\\xF6\\xF8-\\x2FF\\x370-\\x37D\\x37F-\\x1FFF\\x200C-\\x200D\\x2070-\\x218F\\x2C00-\\x2FEF\\x3001-\\xD7FF\\xF900-\\xFDCF\\xFDF0-\\xFFFD]" );
if ( keyToken.contains( QRegExp( nameCharRegexp ) ) || keyToken.contains( QRegExp( nameStartCharRegexp ) ) )
{
QString errorString = QObject::tr( "Entry token invalid : '%1'. The token will not be saved to file." ).arg( keyToken );
QgsMessageLog::logMessage( errorString, QString::null, QgsMessageLog::CRITICAL );
}
}
return keyTokens;
}
/**
return the property that matches the given key sequence, if any
@param scope scope of key
@param key keyname
@param rootProperty is likely to be the top level QgsProjectPropertyKey in QgsProject:e:Imp.
@return null if not found, otherwise located Property
*/
QgsProjectProperty* findKey_( const QString& scope,
const QString& key,
QgsProjectPropertyKey& rootProperty )
{
QgsProjectPropertyKey* currentProperty = &rootProperty;
QgsProjectProperty* nextProperty; // link to next property down hierarchy
QStringList keySequence = makeKeyTokens_( scope, key );
while ( !keySequence.isEmpty() )
{
// if the current head of the sequence list matches the property name,
// then traverse down the property hierarchy
if ( keySequence.first() == currentProperty->name() )
{
// remove front key since we're traversing down a level
keySequence.pop_front();
if ( 1 == keySequence.count() )
{
// if we have only one key name left, then return the key found
return currentProperty->find( keySequence.front() );
}
else if ( keySequence.isEmpty() )
{
// if we're out of keys then the current property is the one we
// want; i.e., we're in the rate case of being at the top-most
// property node
return currentProperty;
}
else if (( nextProperty = currentProperty->find( keySequence.first() ) ) )
{
if ( nextProperty->isKey() )
{
currentProperty = static_cast<QgsProjectPropertyKey*>( nextProperty );
}
else if ( nextProperty->isValue() && 1 == keySequence.count() )
{
// it may be that this may be one of several property value
// nodes keyed by QDict string; if this is the last remaining
// key token and the next property is a value node, then
// that's the situation, so return the currentProperty
return currentProperty;
}
else
{
// QgsProjectPropertyValue not Key, so return null
return nullptr;
}
}
else
{
// if the next key down isn't found
// then the overall key sequence doesn't exist
return nullptr;
}
}
else
{
return nullptr;
}
}
return nullptr;
}
/** Add the given key and value
@param scope scope of key
@param key key name
@param rootProperty is the property from which to start adding
@param value the value associated with the key
*/
QgsProjectProperty *addKey_( const QString& scope,
const QString& key,
QgsProjectPropertyKey* rootProperty,
const QVariant& value )
{
QStringList keySequence = makeKeyTokens_( scope, key );
// cursor through property key/value hierarchy
QgsProjectPropertyKey *currentProperty = rootProperty;
QgsProjectProperty *nextProperty; // link to next property down hierarchy
QgsProjectPropertyKey* newPropertyKey;
while ( ! keySequence.isEmpty() )
{
// if the current head of the sequence list matches the property name,
// then traverse down the property hierarchy
if ( keySequence.first() == currentProperty->name() )
{
// remove front key since we're traversing down a level
keySequence.pop_front();
// if key sequence has one last element, then we use that as the
// name to store the value
if ( 1 == keySequence.count() )
{
currentProperty->setValue( keySequence.front(), value );
return currentProperty;
}
// we're at the top element if popping the keySequence element
// will leave it empty; in that case, just add the key
else if ( keySequence.isEmpty() )
{
currentProperty->setValue( value );
return currentProperty;
}
else if (( nextProperty = currentProperty->find( keySequence.first() ) ) )
{
currentProperty = dynamic_cast<QgsProjectPropertyKey*>( nextProperty );
if ( currentProperty )
{
continue;
}
else // QgsProjectPropertyValue not Key, so return null
{
return nullptr;
}
}
else // the next subkey doesn't exist, so add it
{
if (( newPropertyKey = currentProperty->addKey( keySequence.first() ) ) )
{
currentProperty = newPropertyKey;
}
continue;
}
}
else
{
return nullptr;
}
}
return nullptr;
}
void removeKey_( const QString& scope,
const QString& key,
QgsProjectPropertyKey &rootProperty )
{
QgsProjectPropertyKey *currentProperty = &rootProperty;
QgsProjectProperty *nextProperty = nullptr; // link to next property down hierarchy
QgsProjectPropertyKey *previousQgsPropertyKey = nullptr; // link to previous property up hierarchy
QStringList keySequence = makeKeyTokens_( scope, key );
while ( ! keySequence.isEmpty() )
{
// if the current head of the sequence list matches the property name,
// then traverse down the property hierarchy
if ( keySequence.first() == currentProperty->name() )
{
// remove front key since we're traversing down a level
keySequence.pop_front();
// if we have only one key name left, then try to remove the key
// with that name
if ( 1 == keySequence.count() )
{
currentProperty->removeKey( keySequence.front() );
}
// if we're out of keys then the current property is the one we
// want to remove, but we can't delete it directly; we need to
// delete it from the parent property key container
else if ( keySequence.isEmpty() )
{
previousQgsPropertyKey->removeKey( currentProperty->name() );
}
else if (( nextProperty = currentProperty->find( keySequence.first() ) ) )
{
previousQgsPropertyKey = currentProperty;
currentProperty = dynamic_cast<QgsProjectPropertyKey*>( nextProperty );
if ( currentProperty )
{
continue;
}
else // QgsProjectPropertyValue not Key, so return null
{
return;
}
}
else // if the next key down isn't found
{ // then the overall key sequence doesn't exist
return;
}
}
else
{
return;
}
}
}
QgsProject::QgsProject( QObject* parent )
: QObject( parent )
, mBadLayerHandler( new QgsProjectBadLayerHandler() )
, mSnappingConfig( this )
, mRelationManager( new QgsRelationManager( this ) )
, mRootGroup( new QgsLayerTreeGroup )
, mAutoTransaction( false )
, mEvaluateDefaultValues( false )
, mDirty( false )
{
mProperties.setName( QStringLiteral( "properties" ) );
clear();
// bind the layer tree to the map layer registry.
// whenever layers are added to or removed from the registry,
// layer tree will be updated
mLayerTreeRegistryBridge = new QgsLayerTreeRegistryBridge( mRootGroup, this, this );
connect( this, SIGNAL( layersAdded( QList<QgsMapLayer*> ) ), this, SLOT( onMapLayersAdded( QList<QgsMapLayer*> ) ) );
connect( this, SIGNAL( layersRemoved( QStringList ) ), this, SLOT( cleanTransactionGroups() ) );
connect( this, SIGNAL( layersWillBeRemoved( QList<QgsMapLayer*> ) ), this, SLOT( onMapLayersRemoved( QList<QgsMapLayer*> ) ) );
}
QgsProject::~QgsProject()
{
delete mBadLayerHandler;
delete mRelationManager;
delete mLayerTreeRegistryBridge;
delete mRootGroup;
removeAllMapLayers();
}
QgsProject *QgsProject::instance()
{
if ( !sProject )
{
sProject = new QgsProject;
}
return sProject;
}
void QgsProject::setTitle( const QString& title )
{
if ( title == mTitle )
return;
mTitle = title;
setDirty( true );
}
QString QgsProject::title() const
{
return mTitle;
}
bool QgsProject::isDirty() const
{
return mDirty;
}
void QgsProject::setDirty( bool b )
{
mDirty = b;
}
void QgsProject::setFileName( const QString& name )
{
if ( name == mFile.fileName() )
return;
QString oldHomePath = homePath();
mFile.setFileName( name );
emit fileNameChanged();
QString newHomePath = homePath();
if ( newHomePath != oldHomePath )
emit homePathChanged();
setDirty( true );
}
QString QgsProject::fileName() const
{
return mFile.fileName();
}
QFileInfo QgsProject::fileInfo() const
{
return QFileInfo( mFile );
}
QgsCoordinateReferenceSystem QgsProject::crs() const
{
QgsCoordinateReferenceSystem projectCrs;
long currentCRS = readNumEntry( QStringLiteral( "SpatialRefSys" ), QStringLiteral( "/ProjectCRSID" ), -1 );
if ( currentCRS != -1 )
{
projectCrs = QgsCoordinateReferenceSystem::fromSrsId( currentCRS );
}
return projectCrs;
}
void QgsProject::setCrs( const QgsCoordinateReferenceSystem &crs )
{
writeEntry( QStringLiteral( "SpatialRefSys" ), QStringLiteral( "/ProjectCRSProj4String" ), crs.toProj4() );
writeEntry( QStringLiteral( "SpatialRefSys" ), QStringLiteral( "/ProjectCRSID" ), static_cast< int >( crs.srsid() ) );
writeEntry( QStringLiteral( "SpatialRefSys" ), QStringLiteral( "/ProjectCrs" ), crs.authid() );
setDirty( true );
}
QString QgsProject::ellipsoid() const
{
return readEntry( QStringLiteral( "Measure" ), QStringLiteral( "/Ellipsoid" ), GEO_NONE );
}
void QgsProject::setEllipsoid( const QString& ellipsoid )
{
writeEntry( QStringLiteral( "Measure" ), QStringLiteral( "/Ellipsoid" ), ellipsoid );
setDirty( true );
}
void QgsProject::clear()
{
mFile.setFileName( QString() );
mProperties.clearKeys();
mTitle.clear();
mAutoTransaction = false;
mEvaluateDefaultValues = false;
mDirty = false;
mCustomVariables.clear();
mEmbeddedLayers.clear();
mRelationManager->clear();
mSnappingConfig.reset();
emit snappingConfigChanged();
mMapThemeCollection.reset( new QgsMapThemeCollection( this ) );
emit mapThemeCollectionChanged();
mRootGroup->removeAllChildren();
// reset some default project properties
// XXX THESE SHOULD BE MOVED TO STATUSBAR RELATED SOURCE
writeEntry( QStringLiteral( "PositionPrecision" ), QStringLiteral( "/Automatic" ), true );
writeEntry( QStringLiteral( "PositionPrecision" ), QStringLiteral( "/DecimalPlaces" ), 2 );
writeEntry( QStringLiteral( "Paths" ), QStringLiteral( "/Absolute" ), false );
//copy default units to project
QSettings s;
writeEntry( QStringLiteral( "Measurement" ), QStringLiteral( "/DistanceUnits" ), s.value( QStringLiteral( "/qgis/measure/displayunits" ) ).toString() );
writeEntry( QStringLiteral( "Measurement" ), QStringLiteral( "/AreaUnits" ), s.value( QStringLiteral( "/qgis/measure/areaunits" ) ).toString() );
setDirty( false );
}
// basically a debugging tool to dump property list values
void dump_( const QgsProjectPropertyKey& topQgsPropertyKey )
{
QgsDebugMsg( "current properties:" );
topQgsPropertyKey.dump();
}
/**
Restore any optional properties found in "doc" to "properties".
properties tags for all optional properties. Within that there will be scope
tags. In the following example there exist one property in the "fsplugin"
scope. "layers" is a list containing three string values.
\code{.xml}
<properties>
<fsplugin>
<foo type="int" >42</foo>
<baz type="int" >1</baz>
<layers type="QStringList" >
<value>railroad</value>
<value>airport</value>
</layers>
<xyqzzy type="int" >1</xyqzzy>
<bar type="double" >123.456</bar>
<feature_types type="QStringList" >
<value>type</value>
</feature_types>
</fsplugin>
</properties>
\endcode
@param doc xml document
@param project_properties should be the top QgsProjectPropertyKey node.
*/
void _getProperties( const QDomDocument& doc, QgsProjectPropertyKey& project_properties )
{
QDomNodeList properties = doc.elementsByTagName( QStringLiteral( "properties" ) );
if ( properties.count() > 1 )
{
QgsDebugMsg( "there appears to be more than one ``properties'' XML tag ... bailing" );
return;
}
else if ( properties.count() < 1 ) // no properties found, so we're done
{
return;
}
// item(0) because there should only be ONE "properties" node
QDomNodeList scopes = properties.item( 0 ).childNodes();
if ( scopes.count() < 1 )
{
QgsDebugMsg( "empty ``properties'' XML tag ... bailing" );
return;
}
QDomNode propertyNode = properties.item( 0 );
if ( ! project_properties.readXml( propertyNode ) )
{
QgsDebugMsg( "Project_properties.readXml() failed" );
}
}
/**
Get the project title
@todo XXX we should go with the attribute xor title, not both.
*/
static void _getTitle( const QDomDocument& doc, QString& title )
{
QDomNodeList nl = doc.elementsByTagName( QStringLiteral( "title" ) );
title = QLatin1String( "" ); // by default the title will be empty
if ( !nl.count() )
{
QgsDebugMsg( "unable to find title element" );
return;
}
QDomNode titleNode = nl.item( 0 ); // there should only be one, so zeroth element ok
if ( !titleNode.hasChildNodes() ) // if not, then there's no actual text
{
QgsDebugMsg( "unable to find title element" );
return;
}
QDomNode titleTextNode = titleNode.firstChild(); // should only have one child
if ( !titleTextNode.isText() )
{
QgsDebugMsg( "unable to find title element" );
return;
}
QDomText titleText = titleTextNode.toText();
title = titleText.data();
}
QgsProjectVersion getVersion( const QDomDocument& doc )
{
QDomNodeList nl = doc.elementsByTagName( QStringLiteral( "qgis" ) );
if ( !nl.count() )
{
QgsDebugMsg( " unable to find qgis element in project file" );
return QgsProjectVersion( 0, 0, 0, QString() );
}
QDomNode qgisNode = nl.item( 0 ); // there should only be one, so zeroth element ok
QDomElement qgisElement = qgisNode.toElement(); // qgis node should be element
QgsProjectVersion projectVersion( qgisElement.attribute( QStringLiteral( "version" ) ) );
return projectVersion;
}
void QgsProject::processLayerJoins( QgsVectorLayer* layer )
{
if ( !layer )
return;
layer->createJoinCaches();
layer->updateFields();
}
QgsSnappingConfig QgsProject::snappingConfig() const
{
return mSnappingConfig;
}
void QgsProject::setSnappingConfig( const QgsSnappingConfig& snappingConfig )
{
if ( mSnappingConfig == snappingConfig )
return;
mSnappingConfig = snappingConfig;
setDirty();
emit snappingConfigChanged();
}
bool QgsProject::_getMapLayers( const QDomDocument& doc, QList<QDomNode>& brokenNodes )
{
// Layer order is set by the restoring the legend settings from project file.
// This is done on the 'readProject( ... )' signal
QDomNodeList nl = doc.elementsByTagName( QStringLiteral( "maplayer" ) );
// process the map layer nodes
if ( 0 == nl.count() ) // if we have no layers to process, bail
{
return true; // Decided to return "true" since it's
// possible for there to be a project with no
// layers; but also, more imporantly, this
// would cause the tests/qgsproject to fail
// since the test suite doesn't currently
// support test layers
}
bool returnStatus = true;
emit layerLoaded( 0, nl.count() );
// order layers based on their dependencies
QgsLayerDefinition::DependencySorter depSorter( doc );
if ( depSorter.hasCycle() || depSorter.hasMissingDependency() )
return false;
QVector<QDomNode> sortedLayerNodes = depSorter.sortedLayerNodes();
// Collect vector layers with joins.
// They need to refresh join caches and symbology infos after all layers are loaded
QList< QPair< QgsVectorLayer*, QDomElement > > vLayerList;
int i = 0;
Q_FOREACH ( const QDomNode& node, sortedLayerNodes )
{
QDomElement element = node.toElement();
QString name = node.namedItem( QStringLiteral( "layername" ) ).toElement().text();
if ( !name.isNull() )
emit loadingLayer( tr( "Loading layer %1" ).arg( name ) );
if ( element.attribute( QStringLiteral( "embedded" ) ) == QLatin1String( "1" ) )
{
createEmbeddedLayer( element.attribute( QStringLiteral( "id" ) ), readPath( element.attribute( QStringLiteral( "project" ) ) ), brokenNodes, vLayerList );
continue;
}
else
{
if ( !addLayer( element, brokenNodes, vLayerList ) )
{
returnStatus = false;
}
}
emit layerLoaded( i + 1, nl.count() );
i++;
}
// Update field map of layers with joins and create join caches if necessary
// Needs to be done here once all dependent layers are loaded
QList< QPair< QgsVectorLayer*, QDomElement > >::iterator vIt = vLayerList.begin();
for ( ; vIt != vLayerList.end(); ++vIt )
{
processLayerJoins( vIt->first );
}
QSet<QgsVectorLayer *> notified;
for ( vIt = vLayerList.begin(); vIt != vLayerList.end(); ++vIt )
{
if ( notified.contains( vIt->first ) )
continue;
notified << vIt->first;
emit readMapLayer( vIt->first, vIt->second );
}
return returnStatus;
}
bool QgsProject::addLayer( const QDomElement &layerElem, QList<QDomNode> &brokenNodes, QList< QPair< QgsVectorLayer*, QDomElement > > &vectorLayerList )
{
QString type = layerElem.attribute( QStringLiteral( "type" ) );
QgsDebugMsg( "Layer type is " + type );
QgsMapLayer *mapLayer = nullptr;
if ( type == QLatin1String( "vector" ) )
{
mapLayer = new QgsVectorLayer;
}
else if ( type == QLatin1String( "raster" ) )
{
mapLayer = new QgsRasterLayer;
}
else if ( type == QLatin1String( "plugin" ) )
{
QString typeName = layerElem.attribute( QStringLiteral( "name" ) );
mapLayer = QgsApplication::pluginLayerRegistry()->createLayer( typeName );
}
if ( !mapLayer )
{
QgsDebugMsg( "Unable to create layer" );
return false;
}
Q_CHECK_PTR( mapLayer );
// have the layer restore state that is stored in Dom node
if ( mapLayer->readLayerXml( layerElem, this ) && mapLayer->isValid() )
{
// postpone readMapLayer signal for vector layers with joins
QgsVectorLayer *vLayer = qobject_cast<QgsVectorLayer*>( mapLayer );
if ( !vLayer || vLayer->vectorJoins().isEmpty() )
emit readMapLayer( mapLayer, layerElem );
else
vectorLayerList.push_back( qMakePair( vLayer, layerElem ) );
QList<QgsMapLayer *> myLayers;
myLayers << mapLayer;
addMapLayers( myLayers );
return true;
}
else
{
delete mapLayer;
QgsDebugMsg( "Unable to load " + type + " layer" );
brokenNodes.push_back( layerElem );
return false;
}
}
bool QgsProject::read( const QString& filename )
{
mFile.setFileName( filename );
return read();
}
bool QgsProject::read()
{
clearError();
QScopedPointer<QDomDocument> doc( new QDomDocument( QStringLiteral( "qgis" ) ) );
if ( !mFile.open( QIODevice::ReadOnly | QIODevice::Text ) )
{
mFile.close();
setError( tr( "Unable to open %1" ).arg( mFile.fileName() ) );
return false;
}
// location of problem associated with errorMsg
int line, column;
QString errorMsg;
if ( !doc->setContent( &mFile, &errorMsg, &line, &column ) )
{
// want to make this class as GUI independent as possible; so commented out
#if 0
QMessageBox::critical( 0, tr( "Project File Read Error" ),
tr( "%1 at line %2 column %3" ).arg( errorMsg ).arg( line ).arg( column ) );
#endif
QString errorString = tr( "Project file read error: %1 at line %2 column %3" )
.arg( errorMsg ).arg( line ).arg( column );
QgsDebugMsg( errorString );
mFile.close();
setError( tr( "%1 for file %2" ).arg( errorString, mFile.fileName() ) );
return false;
}
mFile.close();
QgsDebugMsg( "Opened document " + mFile.fileName() );
QgsDebugMsg( "Project title: " + mTitle );
// get project version string, if any
QgsProjectVersion fileVersion = getVersion( *doc );
QgsProjectVersion thisVersion( Qgis::QGIS_VERSION );
if ( thisVersion > fileVersion )
{
QgsLogger::warning( "Loading a file that was saved with an older "
"version of qgis (saved in " + fileVersion.text() +
", loaded in " + Qgis::QGIS_VERSION +
"). Problems may occur." );
QgsProjectFileTransform projectFile( *doc, fileVersion );
//! Shows a warning when an old project file is read.
emit oldProjectVersionWarning( fileVersion.text() );
QgsDebugMsg( "Emitting oldProjectVersionWarning(oldVersion)." );
projectFile.updateRevision( thisVersion );
}
// start new project, just keep the file name
QString fileName = mFile.fileName();
clear();
mFile.setFileName( fileName );
// now get any properties
_getProperties( *doc, mProperties );
QgsDebugMsg( QString::number( mProperties.count() ) + " properties read" );
dump_( mProperties );
// now get project title
_getTitle( *doc, mTitle );
QDomNodeList nl = doc->elementsByTagName( QStringLiteral( "autotransaction" ) );
if ( nl.count() )
{
QDomElement transactionElement = nl.at( 0 ).toElement();
if ( transactionElement.attribute( QStringLiteral( "active" ), QStringLiteral( "0" ) ).toInt() == 1 )
mAutoTransaction = true;
}
nl = doc->elementsByTagName( QStringLiteral( "evaluateDefaultValues" ) );
if ( nl.count() )
{
QDomElement evaluateDefaultValuesElement = nl.at( 0 ).toElement();
if ( evaluateDefaultValuesElement.attribute( QStringLiteral( "active" ), QStringLiteral( "0" ) ).toInt() == 1 )
mEvaluateDefaultValues = true;
}
// read the layer tree from project file
mRootGroup->setCustomProperty( QStringLiteral( "loading" ), 1 );
QDomElement layerTreeElem = doc->documentElement().firstChildElement( QStringLiteral( "layer-tree-group" ) );
if ( !layerTreeElem.isNull() )
{
// read the tree but do not resolve the references (we have not loaded the layers yet)
mRootGroup->readChildrenFromXml( layerTreeElem );
}
else
{
QgsLayerTreeUtils::readOldLegend( mRootGroup, doc->documentElement().firstChildElement( QStringLiteral( "legend" ) ) );
}
QgsDebugMsg( "Loaded layer tree:\n " + mRootGroup->dump() );
mLayerTreeRegistryBridge->setEnabled( false );
// get the map layers
QList<QDomNode> brokenNodes;
bool clean = _getMapLayers( *doc, brokenNodes );
// review the integrity of the retrieved map layers
if ( !clean )
{
QgsDebugMsg( "Unable to get map layers from project file." );
if ( !brokenNodes.isEmpty() )
{
QgsDebugMsg( "there are " + QString::number( brokenNodes.size() ) + " broken layers" );
}
// we let a custom handler decide what to do with missing layers
// (default implementation ignores them, there's also a GUI handler that lets user choose correct path)
mBadLayerHandler->handleBadLayers( brokenNodes );
}
// now that layers are loaded, we can resolve layer tree's references to the layers
mRootGroup->resolveReferences( this );
mLayerTreeRegistryBridge->setEnabled( true );
// load embedded groups and layers
loadEmbeddedNodes( mRootGroup );
// make sure the are just valid layers
QgsLayerTreeUtils::removeInvalidLayers( mRootGroup );
mRootGroup->removeCustomProperty( QStringLiteral( "loading" ) );
mMapThemeCollection.reset( new QgsMapThemeCollection( this ) );
emit mapThemeCollectionChanged();
mMapThemeCollection->readXml( *doc );
// reassign change dependencies now that all layers are loaded
QMap<QString, QgsMapLayer*> existingMaps = mapLayers();
for ( QMap<QString, QgsMapLayer*>::iterator it = existingMaps.begin(); it != existingMaps.end(); it++ )
{
it.value()->setDependencies( it.value()->dependencies() );
}
mSnappingConfig.readProject( *doc );
emit snappingConfigChanged();
//add variables defined in project file
QStringList variableNames = readListEntry( QStringLiteral( "Variables" ), QStringLiteral( "/variableNames" ) );
QStringList variableValues = readListEntry( QStringLiteral( "Variables" ), QStringLiteral( "/variableValues" ) );
mCustomVariables.clear();
if ( variableNames.length() == variableValues.length() )
{
for ( int i = 0; i < variableNames.length(); ++i )
{
mCustomVariables.insert( variableNames.at( i ), variableValues.at( i ) );
}
}
else
{
QgsMessageLog::logMessage( tr( "Project Variables Invalid" ), tr( "The project contains invalid variable settings." ) );
}
emit customVariablesChanged();
// read the project: used by map canvas and legend
emit readProject( *doc );
// if all went well, we're allegedly in pristine state
if ( clean )
setDirty( false );
emit nonIdentifiableLayersChanged( nonIdentifiableLayers() );
return true;
}
void QgsProject::loadEmbeddedNodes( QgsLayerTreeGroup *group )
{
Q_FOREACH ( QgsLayerTreeNode *child, group->children() )
{
if ( QgsLayerTree::isGroup( child ) )
{
QgsLayerTreeGroup *childGroup = QgsLayerTree::toGroup( child );
if ( childGroup->customProperty( QStringLiteral( "embedded" ) ).toInt() )
{
// make sure to convert the path from relative to absolute
QString projectPath = readPath( childGroup->customProperty( QStringLiteral( "embedded_project" ) ).toString() );
childGroup->setCustomProperty( QStringLiteral( "embedded_project" ), projectPath );
QgsLayerTreeGroup *newGroup = createEmbeddedGroup( childGroup->name(), projectPath, childGroup->customProperty( QStringLiteral( "embedded-invisible-layers" ) ).toStringList() );
if ( newGroup )
{
QList<QgsLayerTreeNode*> clonedChildren;
Q_FOREACH ( QgsLayerTreeNode *newGroupChild, newGroup->children() )
clonedChildren << newGroupChild->clone();
delete newGroup;
childGroup->insertChildNodes( 0, clonedChildren );
}
}
else
{
loadEmbeddedNodes( childGroup );
}
}
else if ( QgsLayerTree::isLayer( child ) )
{
if ( child->customProperty( QStringLiteral( "embedded" ) ).toInt() )
{
QList<QDomNode> brokenNodes;
QList< QPair< QgsVectorLayer*, QDomElement > > vectorLayerList;
createEmbeddedLayer( QgsLayerTree::toLayer( child )->layerId(), child->customProperty( QStringLiteral( "embedded_project" ) ).toString(), brokenNodes, vectorLayerList );
}
}
}
}