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qgsproject.cpp
3049 lines (2509 loc) · 90.2 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 "qgslabelingenginesettings.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 "qgspathresolver.h"
#include "qgsprojectstorage.h"
#include "qgsprojectstorageregistry.h"
#include "qgsprojectversion.h"
#include "qgsrasterlayer.h"
#include "qgsreadwritecontext.h"
#include "qgsrectangle.h"
#include "qgsrelationmanager.h"
#include "qgsannotationmanager.h"
#include "qgsvectorlayerjoininfo.h"
#include "qgsmapthemecollection.h"
#include "qgslayerdefinition.h"
#include "qgsunittypes.h"
#include "qgstransaction.h"
#include "qgstransactiongroup.h"
#include "qgsvectordataprovider.h"
#include "qgsprojectbadlayerhandler.h"
#include "qgssettings.h"
#include "qgsmaplayerlistutils.h"
#include "qgsmeshlayer.h"
#include "qgslayoutmanager.h"
#include "qgsmaplayerstore.h"
#include "qgsziputils.h"
#include "qgsauxiliarystorage.h"
#include "qgssymbollayerutils.h"
#include "qgsapplication.h"
#include "qgsexpressioncontextutils.h"
#include <QApplication>
#include <QFileInfo>
#include <QDomNode>
#include <QObject>
#include <QTextStream>
#include <QTemporaryFile>
#include <QDir>
#include <QUrl>
#ifdef _MSC_VER
#include <sys/utime.h>
#else
#include <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(), Qgis::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
\param propertiesModified the parameter will be set to true if the written entry modifies pre-existing properties
*/
QgsProjectProperty *addKey_( const QString &scope,
const QString &key,
QgsProjectPropertyKey *rootProperty,
const QVariant &value,
bool &propertiesModified )
{
QStringList keySequence = makeKeyTokens_( scope, key );
// cursor through property key/value hierarchy
QgsProjectPropertyKey *currentProperty = rootProperty;
QgsProjectProperty *nextProperty; // link to next property down hierarchy
QgsProjectPropertyKey *newPropertyKey = nullptr;
propertiesModified = false;
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() )
{
QgsProjectProperty *property = currentProperty->find( keySequence.front() );
if ( !property || property->value() != value )
{
currentProperty->setValue( keySequence.front(), value );
propertiesModified = true;
}
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() )
{
if ( currentProperty->value() != value )
{
currentProperty->setValue( value );
propertiesModified = true;
}
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;
}
/**
* Remove a given key
\param scope scope of key
\param key key name
\param rootProperty is the property from which to start adding
*/
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 )
, mLayerStore( new QgsMapLayerStore( this ) )
, mBadLayerHandler( new QgsProjectBadLayerHandler() )
, mSnappingConfig( this )
, mRelationManager( new QgsRelationManager( this ) )
, mAnnotationManager( new QgsAnnotationManager( this ) )
, mLayoutManager( new QgsLayoutManager( this ) )
, mRootGroup( new QgsLayerTree )
, mLabelingEngineSettings( new QgsLabelingEngineSettings )
, mArchive( new QgsProjectArchive() )
, mAuxiliaryStorage( new QgsAuxiliaryStorage() )
{
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, &QgsProject::layersAdded, this, &QgsProject::onMapLayersAdded );
connect( this, &QgsProject::layersRemoved, this, [ = ] { cleanTransactionGroups(); } );
connect( this, qgis::overload< const QList<QgsMapLayer *> & >::of( &QgsProject::layersWillBeRemoved ), this, &QgsProject::onMapLayersRemoved );
// proxy map layer store signals to this
connect( mLayerStore.get(), qgis::overload<const QStringList &>::of( &QgsMapLayerStore::layersWillBeRemoved ),
this, qgis::overload< const QStringList &>::of( &QgsProject::layersWillBeRemoved ) );
connect( mLayerStore.get(), qgis::overload< const QList<QgsMapLayer *> & >::of( &QgsMapLayerStore::layersWillBeRemoved ),
this, qgis::overload< const QList<QgsMapLayer *> & >::of( &QgsProject::layersWillBeRemoved ) );
connect( mLayerStore.get(), qgis::overload< const QString & >::of( &QgsMapLayerStore::layerWillBeRemoved ),
this, qgis::overload< const QString & >::of( &QgsProject::layerWillBeRemoved ) );
connect( mLayerStore.get(), qgis::overload< QgsMapLayer * >::of( &QgsMapLayerStore::layerWillBeRemoved ),
this, qgis::overload< QgsMapLayer * >::of( &QgsProject::layerWillBeRemoved ) );
connect( mLayerStore.get(), qgis::overload<const QStringList & >::of( &QgsMapLayerStore::layersRemoved ), this, &QgsProject::layersRemoved );
connect( mLayerStore.get(), &QgsMapLayerStore::layerRemoved, this, &QgsProject::layerRemoved );
connect( mLayerStore.get(), &QgsMapLayerStore::allLayersRemoved, this, &QgsProject::removeAll );
connect( mLayerStore.get(), &QgsMapLayerStore::layersAdded, this, &QgsProject::layersAdded );
connect( mLayerStore.get(), &QgsMapLayerStore::layerWasAdded, this, &QgsProject::layerWasAdded );
if ( QgsApplication::instance() )
{
connect( QgsApplication::instance(), &QgsApplication::requestForTranslatableObjects, this, &QgsProject::registerTranslatableObjects );
}
connect( mLayerStore.get(), qgis::overload< const QList<QgsMapLayer *> & >::of( &QgsMapLayerStore::layersWillBeRemoved ), this,
[ = ]( const QList<QgsMapLayer *> &layers )
{
for ( const auto &layer : layers )
{
disconnect( layer, &QgsMapLayer::dataSourceChanged, mRelationManager, &QgsRelationManager::updateRelationsStatus );
}
}
);
connect( mLayerStore.get(), qgis::overload< const QList<QgsMapLayer *> & >::of( &QgsMapLayerStore::layersAdded ), this,
[ = ]( const QList<QgsMapLayer *> &layers )
{
for ( const auto &layer : layers )
{
connect( layer, &QgsMapLayer::dataSourceChanged, mRelationManager, &QgsRelationManager::updateRelationsStatus );
}
}
);
}
QgsProject::~QgsProject()
{
mIsBeingDeleted = true;
clear();
delete mBadLayerHandler;
delete mRelationManager;
delete mLayerTreeRegistryBridge;
delete mRootGroup;
if ( this == sProject )
{
sProject = nullptr;
}
}
void QgsProject::setInstance( QgsProject *project )
{
sProject = project;
}
QgsProject *QgsProject::instance()
{
if ( !sProject )
{
sProject = new QgsProject;
}
return sProject;
}
void QgsProject::setTitle( const QString &title )
{
if ( title == mMetadata.title() )
return;
mMetadata.setTitle( title );
emit metadataChanged();
setDirty( true );
}
QString QgsProject::title() const
{
return mMetadata.title();
}
bool QgsProject::isDirty() const
{
return mDirty;
}
void QgsProject::setDirty( const bool dirty )
{
if ( dirty && mDirtyBlockCount > 0 )
return;
if ( mDirty == dirty )
return;
mDirty = dirty;
emit isDirtyChanged( mDirty );
}
void QgsProject::setPresetHomePath( const QString &path )
{
if ( path == mHomePath )
return;
mHomePath = path;
emit homePathChanged();
setDirty( true );
}
void QgsProject::registerTranslatableContainers( QgsTranslationContext *translationContext, QgsAttributeEditorContainer *parent, const QString &layerId )
{
const QList<QgsAttributeEditorElement *> elements = parent->children();
for ( QgsAttributeEditorElement *element : elements )
{
if ( element->type() == QgsAttributeEditorElement::AeTypeContainer )
{
QgsAttributeEditorContainer *container = dynamic_cast<QgsAttributeEditorContainer *>( element );
translationContext->registerTranslation( QStringLiteral( "project:layers:%1:formcontainers" ).arg( layerId ), container->name() );
if ( !container->children().empty() )
registerTranslatableContainers( translationContext, container, layerId );
}
}
}
void QgsProject::registerTranslatableObjects( QgsTranslationContext *translationContext )
{
//register layers
const QList<QgsLayerTreeLayer *> layers = mRootGroup->findLayers();
for ( const QgsLayerTreeLayer *layer : layers )
{
translationContext->registerTranslation( QStringLiteral( "project:layers:%1" ).arg( layer->layerId() ), layer->name() );
QgsMapLayer *mapLayer = layer->layer();
if ( mapLayer && mapLayer->type() == QgsMapLayerType::VectorLayer )
{
QgsVectorLayer *vlayer = qobject_cast<QgsVectorLayer *>( mapLayer );
//register aliases and fields
const QgsFields fields = vlayer->fields();
for ( const QgsField &field : fields )
{
QString fieldName;
if ( field.alias().isEmpty() )
fieldName = field.name();
else
fieldName = field.alias();
translationContext->registerTranslation( QStringLiteral( "project:layers:%1:fieldaliases" ).arg( vlayer->id() ), fieldName );
if ( field.editorWidgetSetup().type() == QStringLiteral( "ValueRelation" ) )
{
translationContext->registerTranslation( QStringLiteral( "project:layers:%1:fields:%2:valuerelationvalue" ).arg( vlayer->id(), field.name() ), field.editorWidgetSetup().config().value( QStringLiteral( "Value" ) ).toString() );
}
}
//register formcontainers
registerTranslatableContainers( translationContext, vlayer->editFormConfig().invisibleRootContainer(), vlayer->id() );
}
}
//register layergroups
const QList<QgsLayerTreeGroup *> groupLayers = mRootGroup->findGroups();
for ( const QgsLayerTreeGroup *groupLayer : groupLayers )
{
translationContext->registerTranslation( QStringLiteral( "project:layergroups" ), groupLayer->name() );
}
//register relations
const QList<QgsRelation> &relations = mRelationManager->relations().values();
for ( const QgsRelation &relation : relations )
{
translationContext->registerTranslation( QStringLiteral( "project:relations" ), relation.name() );
}
}
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 );
}
QgsProjectStorage *QgsProject::projectStorage() const
{
return QgsApplication::projectStorageRegistry()->projectStorageFromUri( mFile.fileName() );
}
QDateTime QgsProject::lastModified() const
{
if ( QgsProjectStorage *storage = projectStorage() )
{
QgsProjectStorage::Metadata metadata;
storage->readProjectStorageMetadata( mFile.fileName(), metadata );
return metadata.lastModified;
}
else
{
return QFileInfo( mFile.fileName() ).lastModified();
}
}
QString QgsProject::absolutePath() const
{
if ( projectStorage() )
return QString();
if ( mFile.fileName().isEmpty() )
return QString(); // this is to protect ourselves from getting current directory from QFileInfo::absoluteFilePath()
return QFileInfo( mFile.fileName() ).absolutePath();
}
QString QgsProject::absoluteFilePath() const
{
if ( projectStorage() )
return QString();
if ( mFile.fileName().isEmpty() )
return QString(); // this is to protect ourselves from getting current directory from QFileInfo::absoluteFilePath()
return QFileInfo( mFile.fileName() ).absoluteFilePath();
}
QString QgsProject::baseName() const
{
if ( QgsProjectStorage *storage = projectStorage() )
{
QgsProjectStorage::Metadata metadata;
storage->readProjectStorageMetadata( mFile.fileName(), metadata );
return metadata.name;
}
else
{
return QFileInfo( mFile.fileName() ).completeBaseName();
}
}
QgsCoordinateReferenceSystem QgsProject::crs() const
{
return mCrs;
}
void QgsProject::setCrs( const QgsCoordinateReferenceSystem &crs )
{
if ( crs == mCrs )
return;
mCrs = crs;
writeEntry( QStringLiteral( "SpatialRefSys" ), QStringLiteral( "/ProjectionsEnabled" ), crs.isValid() ? 1 : 0 );
setDirty( true );
emit crsChanged();
}
QString QgsProject::ellipsoid() const
{
if ( !crs().isValid() )
return GEO_NONE;
return readEntry( QStringLiteral( "Measure" ), QStringLiteral( "/Ellipsoid" ), GEO_NONE );
}
void QgsProject::setEllipsoid( const QString &ellipsoid )
{
writeEntry( QStringLiteral( "Measure" ), QStringLiteral( "/Ellipsoid" ), ellipsoid );
emit ellipsoidChanged( ellipsoid );
}
QgsCoordinateTransformContext QgsProject::transformContext() const
{
return mTransformContext;
}
void QgsProject::setTransformContext( const QgsCoordinateTransformContext &context )
{
if ( context == mTransformContext )
return;
mTransformContext = context;
for ( auto &layer : mLayerStore.get()->mapLayers() )
{
layer->setTransformContext( context );
}
emit transformContextChanged();
}
void QgsProject::clear()
{
QgsSettings s;
mFile.setFileName( QString() );
mProperties.clearKeys();
mHomePath.clear();
mAutoTransaction = false;
mEvaluateDefaultValues = false;
mDirty = false;
mTrustLayerMetadata = false;
mCustomVariables.clear();
mMetadata = QgsProjectMetadata();
if ( !s.value( QStringLiteral( "projects/anonymize_new_projects" ), false, QgsSettings::Core ).toBool() )
{
mMetadata.setCreationDateTime( QDateTime::currentDateTime() );
mMetadata.setAuthor( QgsApplication::userFullName() );
}
emit metadataChanged();
QgsCoordinateTransformContext context;
context.readSettings();
setTransformContext( context );
mEmbeddedLayers.clear();
mRelationManager->clear();
mAnnotationManager->clear();
mLayoutManager->clear();
mSnappingConfig.reset();
emit snappingConfigChanged( mSnappingConfig );
emit topologicalEditingChanged();
mMapThemeCollection.reset( new QgsMapThemeCollection( this ) );
emit mapThemeCollectionChanged();
mLabelingEngineSettings->clear();
mAuxiliaryStorage.reset( new QgsAuxiliaryStorage() );
mArchive->clear();
emit labelingEngineSettingsChanged();
if ( !mIsBeingDeleted )
{
// possibly other signals should also not be thrown on destruction -- e.g. labelEngineSettingsChanged, etc.
emit projectColorsChanged();
}
// 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
writeEntry( QStringLiteral( "Measurement" ), QStringLiteral( "/DistanceUnits" ), s.value( QStringLiteral( "/qgis/measure/displayunits" ) ).toString() );
writeEntry( QStringLiteral( "Measurement" ), QStringLiteral( "/AreaUnits" ), s.value( QStringLiteral( "/qgis/measure/areaunits" ) ).toString() );
removeAllMapLayers();
mRootGroup->clear();
setDirty( false );
emit cleared();
}
// basically a debugging tool to dump property list values
void dump_( const QgsProjectPropertyKey &topQgsPropertyKey )
{
QgsDebugMsg( QStringLiteral( "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 )
{
QDomElement propertiesElem = doc.documentElement().firstChildElement( QStringLiteral( "properties" ) );
if ( propertiesElem.isNull() ) // no properties found, so we're done
{
return;
}
QDomNodeList scopes = propertiesElem.childNodes();
if ( scopes.count() < 1 )
{
QgsDebugMsg( QStringLiteral( "empty ``properties'' XML tag ... bailing" ) );
return;
}
if ( ! project_properties.readXml( propertiesElem ) )
{
QgsDebugMsg( QStringLiteral( "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.clear(); // by default the title will be empty
if ( !nl.count() )
{
QgsDebugMsg( QStringLiteral( "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( QStringLiteral( "unable to find title element" ) );
return;
}
QDomNode titleTextNode = titleNode.firstChild(); // should only have one child
if ( !titleTextNode.isText() )
{
QgsDebugMsg( QStringLiteral( "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( QStringLiteral( " 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;
}
QgsSnappingConfig QgsProject::snappingConfig() const
{
return mSnappingConfig;
}
void QgsProject::setSnappingConfig( const QgsSnappingConfig &snappingConfig )
{
if ( mSnappingConfig == snappingConfig )
return;
mSnappingConfig = snappingConfig;
setDirty( true );
emit snappingConfigChanged( mSnappingConfig );
}
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;
const QVector<QDomNode> sortedLayerNodes = depSorter.sortedLayerNodes();
int i = 0;
for ( const QDomNode &node : sortedLayerNodes )
{
const QDomElement element = node.toElement();
const QString name = translate( QStringLiteral( "project:layers:%1" ).arg( node.namedItem( QStringLiteral( "id" ) ).toElement().text() ), 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 );
}
else
{
QgsReadWriteContext context;
context.setPathResolver( pathResolver() );
context.setProjectTranslator( this );
context.setTransformContext( transformContext() );
if ( !addLayer( element, brokenNodes, context ) )
{
returnStatus = false;
}
const auto messages = context.takeMessages();
if ( messages.count() )
{
emit loadingLayerMessageReceived( tr( "Loading layer %1" ).arg( name ), messages );
}
}
emit layerLoaded( i + 1, nl.count() );
i++;
}
return returnStatus;
}
bool QgsProject::addLayer( const QDomElement &layerElem, QList<QDomNode> &brokenNodes, QgsReadWriteContext &context )
{
QString type = layerElem.attribute( QStringLiteral( "type" ) );
QgsDebugMsgLevel( "Layer type is " + type, 4 );
std::unique_ptr<QgsMapLayer> mapLayer;
if ( type == QLatin1String( "vector" ) )
{
mapLayer = qgis::make_unique<QgsVectorLayer>();
// apply specific settings to vector layer
if ( QgsVectorLayer *vl = qobject_cast<QgsVectorLayer *>( mapLayer.get() ) )
{
vl->setReadExtentFromXml( mTrustLayerMetadata );
}
}
else if ( type == QLatin1String( "raster" ) )
{
mapLayer = qgis::make_unique<QgsRasterLayer>();
}
else if ( type == QLatin1String( "mesh" ) )
{
mapLayer = qgis::make_unique<QgsMeshLayer>();
}
else if ( type == QLatin1String( "plugin" ) )
{
QString typeName = layerElem.attribute( QStringLiteral( "name" ) );
mapLayer.reset( QgsApplication::pluginLayerRegistry()->createLayer( typeName ) );
}
if ( !mapLayer )
{
QgsDebugMsg( QStringLiteral( "Unable to create layer" ) );
return false;
}
Q_CHECK_PTR( mapLayer ); // NOLINT
// This is tricky: to avoid a leak we need to check if the layer was already in the store
// because if it was, the newly created layer will not be added to the store and it would leak.
const QString layerId { layerElem.namedItem( QStringLiteral( "id" ) ).toElement().text() };
Q_ASSERT( ! layerId.isEmpty() );
const bool layerWasStored { layerStore()->mapLayer( layerId ) != nullptr };
// have the layer restore state that is stored in Dom node