/
qgsmaplayer.cpp
1733 lines (1479 loc) · 52.9 KB
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qgsmaplayer.cpp
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/***************************************************************************
qgsmaplayer.cpp - description
-------------------
begin : Fri Jun 28 2002
copyright : (C) 2002 by Gary E.Sherman
email : sherman at mrcc.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 <QDateTime>
#include <QDir>
#include <QDomDocument>
#include <QDomElement>
#include <QDomImplementation>
#include <QDomNode>
#include <QFile>
#include <QFileInfo>
#include <QSettings> // TODO: get rid of it [MD]
#include <QTextStream>
#include <QUrl>
#include <sqlite3.h>
#include "qgsapplication.h"
#include "qgscoordinatereferencesystem.h"
#include "qgsdatasourceuri.h"
#include "qgslogger.h"
#include "qgsauthmanager.h"
#include "qgsmaplayer.h"
#include "qgsmaplayerlegend.h"
#include "qgsmaplayerstylemanager.h"
#include "qgspluginlayer.h"
#include "qgspluginlayerregistry.h"
#include "qgsprojectfiletransform.h"
#include "qgsproject.h"
#include "qgsproviderregistry.h"
#include "qgsrasterlayer.h"
#include "qgsrectangle.h"
#include "qgsvectorlayer.h"
#include "qgsvectordataprovider.h"
#include "qgsmaplayerregistry.h"
#include "qgsxmlutils.h"
QgsMapLayer::QgsMapLayer( QgsMapLayer::LayerType type,
const QString& lyrname,
const QString& source )
: mValid( false ) // assume the layer is invalid
, mDataSource( source )
, mLayerOrigName( lyrname ) // store the original name
, mID( "" )
, mLayerType( type )
, mBlendMode( QPainter::CompositionMode_SourceOver ) // Default to normal blending
, mLegend( nullptr )
, mStyleManager( new QgsMapLayerStyleManager( this ) )
{
// Set the display name = internal name
mLayerName = capitaliseLayerName( mLayerOrigName );
mShortName = "";
//mShortName.replace( QRegExp( "[\\W]" ), "_" );
// Generate the unique ID of this layer
QDateTime dt = QDateTime::currentDateTime();
mID = lyrname + dt.toString( "yyyyMMddhhmmsszzz" );
// Tidy the ID up to avoid characters that may cause problems
// elsewhere (e.g in some parts of XML). Replaces every non-word
// character (word characters are the alphabet, numbers and
// underscore) with an underscore.
// Note that the first backslashe in the regular expression is
// there for the compiler, so the pattern is actually \W
mID.replace( QRegExp( "[\\W]" ), "_" );
//set some generous defaults for scale based visibility
mMinScale = 0;
mMaxScale = 100000000;
mScaleBasedVisibility = false;
connect( this, SIGNAL( nameChanged() ), this, SIGNAL( layerNameChanged() ) );
connect( mStyleManager, SIGNAL( currentStyleChanged( QString ) ), this, SIGNAL( styleChanged() ) );
}
QgsMapLayer::~QgsMapLayer()
{
delete mLegend;
delete mStyleManager;
}
QgsMapLayer::LayerType QgsMapLayer::type() const
{
return mLayerType;
}
/** Get this layer's unique ID */
QString QgsMapLayer::id() const
{
return mID;
}
void QgsMapLayer::setLayerName( const QString & name )
{
setName( name );
}
void QgsMapLayer::setName( const QString& name )
{
QString newName = capitaliseLayerName( name );
if ( name == mLayerOrigName && newName == mLayerName )
return;
mLayerOrigName = name; // store the new original name
mLayerName = newName;
emit nameChanged();
}
/** Read property of QString layerName. */
QString QgsMapLayer::name() const
{
QgsDebugMsgLevel( "returning name '" + mLayerName + '\'', 4 );
return mLayerName;
}
QString QgsMapLayer::publicSource() const
{
// Redo this every time we're asked for it, as we don't know if
// dataSource has changed.
QString safeName = QgsDataSourceURI::removePassword( mDataSource );
return safeName;
}
QString QgsMapLayer::source() const
{
return mDataSource;
}
QgsRectangle QgsMapLayer::extent()
{
return mExtent;
}
/** Write blend mode for layer */
void QgsMapLayer::setBlendMode( QPainter::CompositionMode blendMode )
{
mBlendMode = blendMode;
emit blendModeChanged( blendMode );
emit styleChanged();
}
/** Read blend mode for layer */
QPainter::CompositionMode QgsMapLayer::blendMode() const
{
return mBlendMode;
}
bool QgsMapLayer::draw( QgsRenderContext& rendererContext )
{
Q_UNUSED( rendererContext );
return false;
}
void QgsMapLayer::drawLabels( QgsRenderContext& rendererContext )
{
Q_UNUSED( rendererContext );
}
bool QgsMapLayer::readLayerXML( const QDomElement& layerElement, const QString& relativeBasePath )
{
bool layerError;
QDomNode mnl;
QDomElement mne;
// read provider
QString provider;
mnl = layerElement.namedItem( "provider" );
mne = mnl.toElement();
provider = mne.text();
// set data source
mnl = layerElement.namedItem( "datasource" );
mne = mnl.toElement();
mDataSource = mne.text();
// if the layer needs authentication, ensure the master password is set
QRegExp rx( "authcfg=([a-z]|[A-Z]|[0-9]){7}" );
if (( rx.indexIn( mDataSource ) != -1 )
&& !QgsAuthManager::instance()->setMasterPassword( true ) )
{
return false;
}
// TODO: this should go to providers
// see also QgsProject::createEmbeddedLayer
if ( provider == "spatialite" )
{
QgsDataSourceURI uri( mDataSource );
uri.setDatabase( QgsProject::instance()->readPath( uri.database(), relativeBasePath ) );
mDataSource = uri.uri();
}
else if ( provider == "ogr" )
{
QStringList theURIParts = mDataSource.split( '|' );
theURIParts[0] = QgsProject::instance()->readPath( theURIParts[0], relativeBasePath );
mDataSource = theURIParts.join( "|" );
}
else if ( provider == "gpx" )
{
QStringList theURIParts = mDataSource.split( '?' );
theURIParts[0] = QgsProject::instance()->readPath( theURIParts[0], relativeBasePath );
mDataSource = theURIParts.join( "?" );
}
else if ( provider == "delimitedtext" )
{
QUrl urlSource = QUrl::fromEncoded( mDataSource.toAscii() );
if ( !mDataSource.startsWith( "file:" ) )
{
QUrl file = QUrl::fromLocalFile( mDataSource.left( mDataSource.indexOf( '?' ) ) );
urlSource.setScheme( "file" );
urlSource.setPath( file.path() );
}
QUrl urlDest = QUrl::fromLocalFile( QgsProject::instance()->readPath( urlSource.toLocalFile(), relativeBasePath ) );
urlDest.setQueryItems( urlSource.queryItems() );
mDataSource = QString::fromAscii( urlDest.toEncoded() );
}
else if ( provider == "wms" )
{
// >>> BACKWARD COMPATIBILITY < 1.9
// For project file backward compatibility we must support old format:
// 1. mode: <url>
// example: http://example.org/wms?
// 2. mode: tiled=<width>;<height>;<resolution>;<resolution>...,ignoreUrl=GetMap;GetFeatureInfo,featureCount=<count>,username=<name>,password=<password>,url=<url>
// example: tiled=256;256;0.703;0.351,url=http://example.org/tilecache?
// example: featureCount=10,http://example.org/wms?
// example: ignoreUrl=GetMap;GetFeatureInfo,username=cimrman,password=jara,url=http://example.org/wms?
// This is modified version of old QgsWmsProvider::parseUri
// The new format has always params crs,format,layers,styles and that params
// should not appear in old format url -> use them to identify version
// XYZ tile layers do not need to contain crs,format params, but they have type=xyz
if ( !mDataSource.contains( "type=" ) &&
!mDataSource.contains( "crs=" ) && !mDataSource.contains( "format=" ) )
{
QgsDebugMsg( "Old WMS URI format detected -> converting to new format" );
QgsDataSourceURI uri;
if ( !mDataSource.startsWith( "http:" ) )
{
QStringList parts = mDataSource.split( ',' );
QStringListIterator iter( parts );
while ( iter.hasNext() )
{
QString item = iter.next();
if ( item.startsWith( "username=" ) )
{
uri.setParam( "username", item.mid( 9 ) );
}
else if ( item.startsWith( "password=" ) )
{
uri.setParam( "password", item.mid( 9 ) );
}
else if ( item.startsWith( "tiled=" ) )
{
// in < 1.9 tiled= may apper in to variants:
// tiled=width;height - non tiled mode, specifies max width and max height
// tiled=width;height;resolutions-1;resolution2;... - tile mode
QStringList params = item.mid( 6 ).split( ';' );
if ( params.size() == 2 ) // non tiled mode
{
uri.setParam( "maxWidth", params.takeFirst() );
uri.setParam( "maxHeight", params.takeFirst() );
}
else if ( params.size() > 2 ) // tiled mode
{
// resolutions are no more needed and size limit is not used for tiles
// we have to tell to the provider however that it is tiled
uri.setParam( "tileMatrixSet", "" );
}
}
else if ( item.startsWith( "featureCount=" ) )
{
uri.setParam( "featureCount", item.mid( 13 ) );
}
else if ( item.startsWith( "url=" ) )
{
uri.setParam( "url", item.mid( 4 ) );
}
else if ( item.startsWith( "ignoreUrl=" ) )
{
uri.setParam( "ignoreUrl", item.mid( 10 ).split( ';' ) );
}
}
}
else
{
uri.setParam( "url", mDataSource );
}
mDataSource = uri.encodedUri();
// At this point, the URI is obviously incomplete, we add additional params
// in QgsRasterLayer::readXml
}
// <<< BACKWARD COMPATIBILITY < 1.9
}
else
{
bool handled = false;
if ( provider == "gdal" )
{
if ( mDataSource.startsWith( "NETCDF:" ) )
{
// NETCDF:filename:variable
// filename can be quoted with " as it can contain colons
QRegExp r( "NETCDF:(.+):([^:]+)" );
if ( r.exactMatch( mDataSource ) )
{
QString filename = r.cap( 1 );
if ( filename.startsWith( '"' ) && filename.endsWith( '"' ) )
filename = filename.mid( 1, filename.length() - 2 );
mDataSource = "NETCDF:\"" + QgsProject::instance()->readPath( filename, relativeBasePath ) + "\":" + r.cap( 2 );
handled = true;
}
}
else if ( mDataSource.startsWith( "HDF4_SDS:" ) )
{
// HDF4_SDS:subdataset_type:file_name:subdataset_index
// filename can be quoted with " as it can contain colons
QRegExp r( "HDF4_SDS:([^:]+):(.+):([^:]+)" );
if ( r.exactMatch( mDataSource ) )
{
QString filename = r.cap( 2 );
if ( filename.startsWith( '"' ) && filename.endsWith( '"' ) )
filename = filename.mid( 1, filename.length() - 2 );
mDataSource = "HDF4_SDS:" + r.cap( 1 ) + ":\"" + QgsProject::instance()->readPath( filename, relativeBasePath ) + "\":" + r.cap( 3 );
handled = true;
}
}
else if ( mDataSource.startsWith( "HDF5:" ) )
{
// HDF5:file_name:subdataset
// filename can be quoted with " as it can contain colons
QRegExp r( "HDF5:(.+):([^:]+)" );
if ( r.exactMatch( mDataSource ) )
{
QString filename = r.cap( 1 );
if ( filename.startsWith( '"' ) && filename.endsWith( '"' ) )
filename = filename.mid( 1, filename.length() - 2 );
mDataSource = "HDF5:\"" + QgsProject::instance()->readPath( filename, relativeBasePath ) + "\":" + r.cap( 2 );
handled = true;
}
}
else if ( mDataSource.contains( QRegExp( "^(NITF_IM|RADARSAT_2_CALIB):" ) ) )
{
// NITF_IM:0:filename
// RADARSAT_2_CALIB:?:filename
QRegExp r( "([^:]+):([^:]+):(.+)" );
if ( r.exactMatch( mDataSource ) )
{
mDataSource = r.cap( 1 ) + ':' + r.cap( 2 ) + ':' + QgsProject::instance()->readPath( r.cap( 3 ), relativeBasePath );
handled = true;
}
}
}
if ( !handled )
mDataSource = QgsProject::instance()->readPath( mDataSource, relativeBasePath );
}
// Set the CRS from project file, asking the user if necessary.
// Make it the saved CRS to have WMS layer projected correctly.
// We will still overwrite whatever GDAL etc picks up anyway
// further down this function.
mnl = layerElement.namedItem( "layername" );
mne = mnl.toElement();
QgsCoordinateReferenceSystem savedCRS;
CUSTOM_CRS_VALIDATION savedValidation;
QDomNode srsNode = layerElement.namedItem( "srs" );
mCRS.readXML( srsNode );
mCRS.setValidationHint( tr( "Specify CRS for layer %1" ).arg( mne.text() ) );
mCRS.validate();
savedCRS = mCRS;
// Do not validate any projections in children, they will be overwritten anyway.
// No need to ask the user for a projections when it is overwritten, is there?
savedValidation = QgsCoordinateReferenceSystem::customSrsValidation();
QgsCoordinateReferenceSystem::setCustomSrsValidation( nullptr );
// now let the children grab what they need from the Dom node.
layerError = !readXml( layerElement );
// overwrite CRS with what we read from project file before the raster/vector
// file readnig functions changed it. They will if projections is specfied in the file.
// FIXME: is this necessary?
QgsCoordinateReferenceSystem::setCustomSrsValidation( savedValidation );
mCRS = savedCRS;
// Abort if any error in layer, such as not found.
if ( layerError )
{
return false;
}
// the internal name is just the data source basename
//QFileInfo dataSourceFileInfo( mDataSource );
//internalName = dataSourceFileInfo.baseName();
// set ID
mnl = layerElement.namedItem( "id" );
if ( ! mnl.isNull() )
{
mne = mnl.toElement();
if ( ! mne.isNull() && mne.text().length() > 10 ) // should be at least 17 (yyyyMMddhhmmsszzz)
{
mID = mne.text();
}
}
// use scale dependent visibility flag
setScaleBasedVisibility( layerElement.attribute( "hasScaleBasedVisibilityFlag" ).toInt() == 1 );
setMinimumScale( layerElement.attribute( "minimumScale" ).toDouble() );
setMaximumScale( layerElement.attribute( "maximumScale" ).toDouble() );
QDomNode extentNode = layerElement.namedItem( "extent" );
if ( !extentNode.isNull() )
{
setExtent( QgsXmlUtils::readRectangle( extentNode.toElement() ) );
}
// set name
mnl = layerElement.namedItem( "layername" );
mne = mnl.toElement();
setName( mne.text() );
//short name
QDomElement shortNameElem = layerElement.firstChildElement( "shortname" );
if ( !shortNameElem.isNull() )
{
mShortName = shortNameElem.text();
}
//title
QDomElement titleElem = layerElement.firstChildElement( "title" );
if ( !titleElem.isNull() )
{
mTitle = titleElem.text();
}
//abstract
QDomElement abstractElem = layerElement.firstChildElement( "abstract" );
if ( !abstractElem.isNull() )
{
mAbstract = abstractElem.text();
}
//keywordList
QDomElement keywordListElem = layerElement.firstChildElement( "keywordList" );
if ( !keywordListElem.isNull() )
{
QStringList kwdList;
for ( QDomNode n = keywordListElem.firstChild(); !n.isNull(); n = n.nextSibling() )
{
kwdList << n.toElement().text();
}
mKeywordList = kwdList.join( ", " );
}
//metadataUrl
QDomElement dataUrlElem = layerElement.firstChildElement( "dataUrl" );
if ( !dataUrlElem.isNull() )
{
mDataUrl = dataUrlElem.text();
mDataUrlFormat = dataUrlElem.attribute( "format", "" );
}
//legendUrl
QDomElement legendUrlElem = layerElement.firstChildElement( "legendUrl" );
if ( !legendUrlElem.isNull() )
{
mLegendUrl = legendUrlElem.text();
mLegendUrlFormat = legendUrlElem.attribute( "format", "" );
}
//attribution
QDomElement attribElem = layerElement.firstChildElement( "attribution" );
if ( !attribElem.isNull() )
{
mAttribution = attribElem.text();
mAttributionUrl = attribElem.attribute( "href", "" );
}
//metadataUrl
QDomElement metaUrlElem = layerElement.firstChildElement( "metadataUrl" );
if ( !metaUrlElem.isNull() )
{
mMetadataUrl = metaUrlElem.text();
mMetadataUrlType = metaUrlElem.attribute( "type", "" );
mMetadataUrlFormat = metaUrlElem.attribute( "format", "" );
}
#if 0
//read transparency level
QDomNode transparencyNode = layer_node.namedItem( "transparencyLevelInt" );
if ( ! transparencyNode.isNull() )
{
// set transparency level only if it's in project
// (otherwise it sets the layer transparent)
QDomElement myElement = transparencyNode.toElement();
setTransparency( myElement.text().toInt() );
}
#endif
readCustomProperties( layerElement );
return true;
} // bool QgsMapLayer::readLayerXML
bool QgsMapLayer::readXml( const QDomNode& layer_node )
{
Q_UNUSED( layer_node );
// NOP by default; children will over-ride with behavior specific to them
return true;
} // void QgsMapLayer::readXml
bool QgsMapLayer::writeLayerXML( QDomElement& layerElement, QDomDocument& document, const QString& relativeBasePath )
{
// use scale dependent visibility flag
layerElement.setAttribute( "hasScaleBasedVisibilityFlag", hasScaleBasedVisibility() ? 1 : 0 );
layerElement.setAttribute( "minimumScale", QString::number( minimumScale() ) );
layerElement.setAttribute( "maximumScale", QString::number( maximumScale() ) );
if ( !mExtent.isNull() )
{
layerElement.appendChild( QgsXmlUtils::writeRectangle( mExtent, document ) );
}
// ID
QDomElement layerId = document.createElement( "id" );
QDomText layerIdText = document.createTextNode( id() );
layerId.appendChild( layerIdText );
layerElement.appendChild( layerId );
// data source
QDomElement dataSource = document.createElement( "datasource" );
QString src = source();
QgsVectorLayer *vlayer = qobject_cast<QgsVectorLayer *>( this );
// TODO: what about postgres, mysql and others, they should not go through writePath()
if ( vlayer && vlayer->providerType() == "spatialite" )
{
QgsDataSourceURI uri( src );
QString database = QgsProject::instance()->writePath( uri.database(), relativeBasePath );
uri.setConnection( uri.host(), uri.port(), database, uri.username(), uri.password() );
src = uri.uri();
}
else if ( vlayer && vlayer->providerType() == "ogr" )
{
QStringList theURIParts = src.split( '|' );
theURIParts[0] = QgsProject::instance()->writePath( theURIParts[0], relativeBasePath );
src = theURIParts.join( "|" );
}
else if ( vlayer && vlayer->providerType() == "gpx" )
{
QStringList theURIParts = src.split( '?' );
theURIParts[0] = QgsProject::instance()->writePath( theURIParts[0], relativeBasePath );
src = theURIParts.join( "?" );
}
else if ( vlayer && vlayer->providerType() == "delimitedtext" )
{
QUrl urlSource = QUrl::fromEncoded( src.toAscii() );
QUrl urlDest = QUrl::fromLocalFile( QgsProject::instance()->writePath( urlSource.toLocalFile(), relativeBasePath ) );
urlDest.setQueryItems( urlSource.queryItems() );
src = QString::fromAscii( urlDest.toEncoded() );
}
else if ( vlayer && vlayer->providerType() == "memory" )
{
// Refetch the source from the provider, because adding fields actually changes the source for this provider.
src = vlayer->dataProvider()->dataSourceUri();
}
else
{
bool handled = false;
if ( !vlayer )
{
QgsRasterLayer *rlayer = qobject_cast<QgsRasterLayer *>( this );
// Update path for subdataset
if ( rlayer && rlayer->providerType() == "gdal" )
{
if ( src.startsWith( "NETCDF:" ) )
{
// NETCDF:filename:variable
// filename can be quoted with " as it can contain colons
QRegExp r( "NETCDF:(.+):([^:]+)" );
if ( r.exactMatch( src ) )
{
QString filename = r.cap( 1 );
if ( filename.startsWith( '"' ) && filename.endsWith( '"' ) )
filename = filename.mid( 1, filename.length() - 2 );
src = "NETCDF:\"" + QgsProject::instance()->writePath( filename, relativeBasePath ) + "\":" + r.cap( 2 );
handled = true;
}
}
else if ( src.startsWith( "HDF4_SDS:" ) )
{
// HDF4_SDS:subdataset_type:file_name:subdataset_index
// filename can be quoted with " as it can contain colons
QRegExp r( "HDF4_SDS:([^:]+):(.+):([^:]+)" );
if ( r.exactMatch( src ) )
{
QString filename = r.cap( 2 );
if ( filename.startsWith( '"' ) && filename.endsWith( '"' ) )
filename = filename.mid( 1, filename.length() - 2 );
src = "HDF4_SDS:" + r.cap( 1 ) + ":\"" + QgsProject::instance()->writePath( filename, relativeBasePath ) + "\":" + r.cap( 3 );
handled = true;
}
}
else if ( src.startsWith( "HDF5:" ) )
{
// HDF5:file_name:subdataset
// filename can be quoted with " as it can contain colons
QRegExp r( "HDF5:(.+):([^:]+)" );
if ( r.exactMatch( src ) )
{
QString filename = r.cap( 1 );
if ( filename.startsWith( '"' ) && filename.endsWith( '"' ) )
filename = filename.mid( 1, filename.length() - 2 );
src = "HDF5:\"" + QgsProject::instance()->writePath( filename, relativeBasePath ) + "\":" + r.cap( 2 );
handled = true;
}
}
else if ( src.contains( QRegExp( "^(NITF_IM|RADARSAT_2_CALIB):" ) ) )
{
// NITF_IM:0:filename
// RADARSAT_2_CALIB:?:filename
QRegExp r( "([^:]+):([^:]+):(.+)" );
if ( r.exactMatch( src ) )
{
src = r.cap( 1 ) + ':' + r.cap( 2 ) + ':' + QgsProject::instance()->writePath( r.cap( 3 ), relativeBasePath );
handled = true;
}
}
}
}
if ( !handled )
src = QgsProject::instance()->writePath( src, relativeBasePath );
}
QDomText dataSourceText = document.createTextNode( src );
dataSource.appendChild( dataSourceText );
layerElement.appendChild( dataSource );
// layer name
QDomElement layerName = document.createElement( "layername" );
QDomText layerNameText = document.createTextNode( originalName() );
layerName.appendChild( layerNameText );
layerElement.appendChild( layerName );
// layer short name
if ( !mShortName.isEmpty() )
{
QDomElement layerShortName = document.createElement( "shortname" );
QDomText layerShortNameText = document.createTextNode( mShortName );
layerShortName.appendChild( layerShortNameText );
layerElement.appendChild( layerShortName );
}
// layer title
if ( !mTitle.isEmpty() )
{
QDomElement layerTitle = document.createElement( "title" );
QDomText layerTitleText = document.createTextNode( mTitle );
layerTitle.appendChild( layerTitleText );
layerElement.appendChild( layerTitle );
}
// layer abstract
if ( !mAbstract.isEmpty() )
{
QDomElement layerAbstract = document.createElement( "abstract" );
QDomText layerAbstractText = document.createTextNode( mAbstract );
layerAbstract.appendChild( layerAbstractText );
layerElement.appendChild( layerAbstract );
}
// layer keyword list
QStringList keywordStringList = keywordList().split( ',' );
if ( !keywordStringList.isEmpty() )
{
QDomElement layerKeywordList = document.createElement( "keywordList" );
for ( int i = 0; i < keywordStringList.size(); ++i )
{
QDomElement layerKeywordValue = document.createElement( "value" );
QDomText layerKeywordText = document.createTextNode( keywordStringList.at( i ).trimmed() );
layerKeywordValue.appendChild( layerKeywordText );
layerKeywordList.appendChild( layerKeywordValue );
}
layerElement.appendChild( layerKeywordList );
}
// layer metadataUrl
QString aDataUrl = dataUrl();
if ( !aDataUrl.isEmpty() )
{
QDomElement layerDataUrl = document.createElement( "dataUrl" );
QDomText layerDataUrlText = document.createTextNode( aDataUrl );
layerDataUrl.appendChild( layerDataUrlText );
layerDataUrl.setAttribute( "format", dataUrlFormat() );
layerElement.appendChild( layerDataUrl );
}
// layer legendUrl
QString aLegendUrl = legendUrl();
if ( !aLegendUrl.isEmpty() )
{
QDomElement layerLegendUrl = document.createElement( "legendUrl" );
QDomText layerLegendUrlText = document.createTextNode( aLegendUrl );
layerLegendUrl.appendChild( layerLegendUrlText );
layerLegendUrl.setAttribute( "format", legendUrlFormat() );
layerElement.appendChild( layerLegendUrl );
}
// layer attribution
QString aAttribution = attribution();
if ( !aAttribution.isEmpty() )
{
QDomElement layerAttribution = document.createElement( "attribution" );
QDomText layerAttributionText = document.createTextNode( aAttribution );
layerAttribution.appendChild( layerAttributionText );
layerAttribution.setAttribute( "href", attributionUrl() );
layerElement.appendChild( layerAttribution );
}
// layer metadataUrl
QString aMetadataUrl = metadataUrl();
if ( !aMetadataUrl.isEmpty() )
{
QDomElement layerMetadataUrl = document.createElement( "metadataUrl" );
QDomText layerMetadataUrlText = document.createTextNode( aMetadataUrl );
layerMetadataUrl.appendChild( layerMetadataUrlText );
layerMetadataUrl.setAttribute( "type", metadataUrlType() );
layerMetadataUrl.setAttribute( "format", metadataUrlFormat() );
layerElement.appendChild( layerMetadataUrl );
}
// timestamp if supported
if ( timestamp() > QDateTime() )
{
QDomElement stamp = document.createElement( "timestamp" );
QDomText stampText = document.createTextNode( timestamp().toString( Qt::ISODate ) );
stamp.appendChild( stampText );
layerElement.appendChild( stamp );
}
layerElement.appendChild( layerName );
// zorder
// This is no longer stored in the project file. It is superfluous since the layers
// are written and read in the proper order.
// spatial reference system id
QDomElement mySrsElement = document.createElement( "srs" );
mCRS.writeXML( mySrsElement, document );
layerElement.appendChild( mySrsElement );
#if 0
// <transparencyLevelInt>
QDomElement transparencyLevelIntElement = document.createElement( "transparencyLevelInt" );
QDomText transparencyLevelIntText = document.createTextNode( QString::number( getTransparency() ) );
transparencyLevelIntElement.appendChild( transparencyLevelIntText );
maplayer.appendChild( transparencyLevelIntElement );
#endif
// now append layer node to map layer node
writeCustomProperties( layerElement, document );
return writeXml( layerElement, document );
} // bool QgsMapLayer::writeXML
QDomDocument QgsMapLayer::asLayerDefinition( const QList<QgsMapLayer *>& layers, const QString& relativeBasePath )
{
QDomDocument doc( "qgis-layer-definition" );
QDomElement qgiselm = doc.createElement( "qlr" );
doc.appendChild( qgiselm );
QDomElement layerselm = doc.createElement( "maplayers" );
Q_FOREACH ( QgsMapLayer* layer, layers )
{
QDomElement layerelm = doc.createElement( "maplayer" );
layer->writeLayerXML( layerelm, doc, relativeBasePath );
layerselm.appendChild( layerelm );
}
qgiselm.appendChild( layerselm );
return doc;
}
QList<QgsMapLayer*> QgsMapLayer::fromLayerDefinition( QDomDocument& document, bool addToRegistry, bool addToLegend, const QString& relativeBasePath )
{
QList<QgsMapLayer*> layers;
QDomNodeList layernodes = document.elementsByTagName( "maplayer" );
for ( int i = 0; i < layernodes.size(); ++i )
{
QDomNode layernode = layernodes.at( i );
QDomElement layerElem = layernode.toElement();
QString type = layerElem.attribute( "type" );
QgsDebugMsg( type );
QgsMapLayer *layer = nullptr;
if ( type == "vector" )
{
layer = new QgsVectorLayer;
}
else if ( type == "raster" )
{
layer = new QgsRasterLayer;
}
else if ( type == "plugin" )
{
QString typeName = layerElem.attribute( "name" );
layer = QgsPluginLayerRegistry::instance()->createLayer( typeName );
}
if ( !layer )
continue;
bool ok = layer->readLayerXML( layerElem, relativeBasePath );
if ( ok )
{
layers << layer;
if ( addToRegistry )
QgsMapLayerRegistry::instance()->addMapLayer( layer, addToLegend );
}
}
return layers;
}
QList<QgsMapLayer *> QgsMapLayer::fromLayerDefinitionFile( const QString &qlrfile )
{
QFile file( qlrfile );
if ( !file.open( QIODevice::ReadOnly ) )
{
QgsDebugMsg( "Can't open file" );
return QList<QgsMapLayer*>();
}
QDomDocument doc;
if ( !doc.setContent( &file ) )
{
QgsDebugMsg( "Can't set content" );
return QList<QgsMapLayer*>();
}
QFileInfo fileinfo( file );
QDir::setCurrent( fileinfo.absoluteDir().path() );
return QgsMapLayer::fromLayerDefinition( doc );
}
bool QgsMapLayer::writeXml( QDomNode & layer_node, QDomDocument & document )
{
Q_UNUSED( layer_node );
Q_UNUSED( document );
// NOP by default; children will over-ride with behavior specific to them
return true;
} // void QgsMapLayer::writeXml
void QgsMapLayer::readCustomProperties( const QDomNode &layerNode, const QString &keyStartsWith )
{
mCustomProperties.readXml( layerNode, keyStartsWith );
}
void QgsMapLayer::writeCustomProperties( QDomNode &layerNode, QDomDocument &doc ) const
{
mCustomProperties.writeXml( layerNode, doc );
}
void QgsMapLayer::readStyleManager( const QDomNode& layerNode )
{
QDomElement styleMgrElem = layerNode.firstChildElement( "map-layer-style-manager" );
if ( !styleMgrElem.isNull() )
mStyleManager->readXml( styleMgrElem );
else
mStyleManager->reset();
}
void QgsMapLayer::writeStyleManager( QDomNode& layerNode, QDomDocument& doc ) const
{
if ( mStyleManager )
{
QDomElement styleMgrElem = doc.createElement( "map-layer-style-manager" );
mStyleManager->writeXml( styleMgrElem );
layerNode.appendChild( styleMgrElem );
}
}
bool QgsMapLayer::isValid()
{
return mValid;
}
void QgsMapLayer::invalidTransformInput()
{
QgsDebugMsg( "called" );
// TODO: emit a signal - it will be used to update legend
}
QString QgsMapLayer::lastErrorTitle()
{
return QString();
}
QString QgsMapLayer::lastError()
{
return QString();
}
#if 0
void QgsMapLayer::connectNotify( const char * signal )
{
Q_UNUSED( signal );
QgsDebugMsgLevel( "QgsMapLayer connected to " + QString( signal ), 3 );
} // QgsMapLayer::connectNotify
#endif
bool QgsMapLayer::isInScaleRange( double scale ) const
{
return !mScaleBasedVisibility || ( mMinScale * QGis::SCALE_PRECISION < scale && scale < mMaxScale );
}
void QgsMapLayer::toggleScaleBasedVisibility( bool theVisibilityFlag )
{
setScaleBasedVisibility( theVisibilityFlag );
}
bool QgsMapLayer::hasScaleBasedVisibility() const
{
return mScaleBasedVisibility;
}
void QgsMapLayer::setMinimumScale( double theMinScale )
{
mMinScale = theMinScale;
}
double QgsMapLayer::minimumScale() const
{
return mMinScale;
}
void QgsMapLayer::setMaximumScale( double theMaxScale )
{
mMaxScale = theMaxScale;
}
void QgsMapLayer::setScaleBasedVisibility( const bool enabled )
{
mScaleBasedVisibility = enabled;
}
double QgsMapLayer::maximumScale() const
{
return mMaxScale;
}
QStringList QgsMapLayer::subLayers() const
{
return QStringList(); // Empty
}