15 #include <QStringList>
28 #include <QRegularExpression>
30 static const char *QGIS_URILIST_MIMETYPE =
"application/x-vnd.qgis.qgis.uri";
35 const QStringList decoded = decode( encData );
36 if ( decoded.size() < 4 )
44 if (
layerType == QLatin1String(
"raster" ) && decoded.size() >= 6 )
55 if ( decoded.size() > 6 )
57 if ( decoded.size() > 7 )
58 pId = decoded.at( 7 );
59 if ( decoded.size() > 8 )
61 if ( decoded.size() > 9 )
64 QgsDebugMsgLevel( QStringLiteral(
"type:%1 key:%2 name:%3 uri:%4 supportedCRS:%5 supportedFormats:%6" )
71 : providerKey( layer->providerType() )
72 , name( layer->name() )
73 , uri( layer->dataProvider() ? layer->dataProvider()->dataSourceUri() : layer->source() )
74 , layerId( layer->id() )
75 , pId( QString::number( QCoreApplication::applicationPid() ) )
77 switch ( layer->
type() )
82 wkbType = qobject_cast< QgsVectorLayer *>( layer )->wkbType();
98 layerType = QStringLiteral(
"pointcloud" );
103 layerType = QStringLiteral(
"vector-tile" );
118 return encode( { layerType,
122 encode( supportedCrs ),
123 encode( supportedFormats ),
135 if ( layerType != QLatin1String(
"vector" ) )
137 error = QObject::tr(
"%1: Not a vector layer." ).arg( name );
148 if ( providerKey == QLatin1String(
"memory" ) )
150 error = QObject::tr(
"Cannot get memory layer." );
163 if ( layerType != QLatin1String(
"raster" ) )
165 error = QObject::tr(
"%1: Not a raster layer." ).arg( name );
185 if ( layerType != QLatin1String(
"mesh" ) )
187 error = QObject::tr(
"%1: Not a mesh layer." ).arg( name );
216 return data->hasFormat( QGIS_URILIST_MIMETYPE );
221 QMimeData *mimeData =
new QMimeData();
223 mimeData->setData( QGIS_URILIST_MIMETYPE, uriListToByteArray( layers ) );
230 QByteArray encodedData = data->data( QGIS_URILIST_MIMETYPE );
231 QDataStream stream( &encodedData, QIODevice::ReadOnly );
234 while ( !stream.atEnd() )
238 list.append(
Uri( xUri ) );
250 _addLayerTreeNodeToUriList( child, uris );
269 const auto constNodes = nodes;
271 _addLayerTreeNodeToUriList( node, uris );
272 return uriListToByteArray( uris );
277 if ( uri.
pId.isEmpty() )
280 const qint64 pid = uri.
pId.toLongLong();
281 return pid == QCoreApplication::applicationPid();
284 QString QgsMimeDataUtils::encode(
const QStringList &items )
288 const QRegularExpression re( QStringLiteral(
"(?<!\\\\):" ) );
289 const auto constItems = items;
290 for (
const QString &item : constItems )
293 str.replace(
'\\', QLatin1String(
"\\\\" ) );
294 str.replace( re, QStringLiteral(
"\\:" ) );
295 encoded +=
str +
':';
297 return encoded.left( encoded.length() - 1 );
300 QStringList QgsMimeDataUtils::decode(
const QString &encoded )
304 bool inEscape =
false;
305 const auto constEncoded = encoded;
306 for (
const QChar
c : constEncoded )
308 if (
c ==
'\\' && inEscape )
312 else if (
c ==
'\\' )
316 else if (
c ==
':' && !inEscape )
318 items.append( item );
327 items.append( item );
334 QByteArray encodedData;
336 QDataStream stream( &encodedData, QIODevice::WriteOnly );
337 const auto constLayers = layers;
338 for (
const Uri &u : constLayers )
Layer tree node points to a map layer.
QgsMapLayer * layer() const
Returns the map layer associated with this node.
This class is a base class for nodes in a layer tree.
QList< QgsLayerTreeNode * > children()
Gets list of children of the node. Children are owned by the parent.
static bool isLayer(const QgsLayerTreeNode *node)
Check whether the node is a valid layer node.
static QgsLayerTreeLayer * toLayer(QgsLayerTreeNode *node)
Cast node to a layer.
static bool isGroup(QgsLayerTreeNode *node)
Check whether the node is a valid group node.
static QgsLayerTreeGroup * toGroup(QgsLayerTreeNode *node)
Cast node to a group.
Base class for all map layer types.
Represents a mesh layer supporting display of data on structured or unstructured meshes.
static QByteArray layerTreeNodesToUriList(const QList< QgsLayerTreeNode * > &nodes)
Returns encoded URI list from a list of layer tree nodes.
static bool isUriList(const QMimeData *data)
QList< QgsMimeDataUtils::Uri > UriList
static QMimeData * encodeUriList(const UriList &layers)
Encodes a URI list to a new QMimeData object.
static UriList decodeUriList(const QMimeData *data)
static bool hasOriginatedFromCurrentAppInstance(const QgsMimeDataUtils::Uri &uri)
Returns true if uri originated from the current QGIS application instance.
static QgsProject * instance()
Returns the QgsProject singleton instance.
Q_INVOKABLE QgsMapLayer * mapLayer(const QString &layerId) const
Retrieve a pointer to a registered layer by layer ID.
QgsCoordinateTransformContext transformContext
Represents a raster layer.
Represents a vector layer which manages a vector based data sets.
static Type parseType(const QString &wktStr)
Attempts to extract the WKB type from a WKT string.
static QString displayString(Type type) SIP_HOLDGIL
Returns a non-translated display string type for a WKB type, e.g., the geometry name used in WKT geom...
@ PointCloudLayer
Added in 3.18.
@ VectorTileLayer
Added in 3.14.
@ AnnotationLayer
Contains freeform, georeferenced annotations. Added in QGIS 3.16.
As part of the API refactoring and improvements which landed in the Processing API was substantially reworked from the x version This was done in order to allow much of the underlying Processing framework to be ported into c
#define QgsDebugMsgLevel(str, level)
QgsMeshLayer * meshLayer(bool &owner, QString &error) const
Gets mesh layer from uri if possible, otherwise returns nullptr and error is set.
QString filePath
Path to file, if uri is associated with a file.
QString uri
Identifier of the data source recognized by its providerKey.
QString name
Human readable name to be used e.g. in layer tree.
QgsMapLayer * mapLayer() const
Returns the layer from the active project corresponding to this uri (if possible),...
QString pId
Unique ID associated with application instance.
QgsRasterLayer * rasterLayer(bool &owner, QString &error) const
Gets raster layer from uri if possible, otherwise returns nullptr and error is set.
QString providerKey
For "vector" / "raster" type: provider id.
QgsVectorLayer * vectorLayer(bool &owner, QString &error) const
Gets vector layer from uri if possible, otherwise returns nullptr and error is set.
QString layerId
Layer ID, if uri is associated with a layer from a QgsProject.
QString data() const
Returns encoded representation of the object.
QgsWkbTypes::Type wkbType
WKB type, if associated with a vector layer, or QgsWkbTypes::Unknown if not yet known.
Uri()=default
Constructs invalid URI.
QStringList supportedFormats
QString layerType
Type of URI.
Setting options for loading vector layers.