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qgswmsserver.cpp
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qgswmsserver.cpp
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/***************************************************************************
qgswmsserver.cpp
-------------------
begin : May 14, 2006
copyright : (C) 2006 by Marco Hugentobler & Ionut Iosifescu Enescu
email : marco dot hugentobler at karto dot baug dot ethz dot ch
***************************************************************************/
/***************************************************************************
* *
* 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 "qgswmsserver.h"
#include "qgscapabilitiescache.h"
#include "qgscrscache.h"
#include "qgsdxfexport.h"
#include "qgsfield.h"
#include "qgsgeometry.h"
#include "qgslayertree.h"
#include "qgslayertreemodel.h"
#include "qgslayertreemodellegendnode.h"
#include "qgslegendrenderer.h"
#include "qgsmaplayer.h"
#include "qgsmaplayerlegend.h"
#include "qgsmaplayerregistry.h"
#include "qgsmaprenderer.h"
#include "qgsmaptopixel.h"
#include "qgsproject.h"
#include "qgsrasteridentifyresult.h"
#include "qgsrasterlayer.h"
#include "qgsscalecalculator.h"
#include "qgscoordinatereferencesystem.h"
#include "qgsvectordataprovider.h"
#include "qgsvectorlayer.h"
#include "qgslogger.h"
#include "qgsmessagelog.h"
#include "qgsmapserviceexception.h"
#include "qgssldconfigparser.h"
#include "qgssymbolv2.h"
#include "qgsrendererv2.h"
#include "qgspaintenginehack.h"
#include "qgsogcutils.h"
#include "qgsfeature.h"
#include "qgseditorwidgetregistry.h"
#include "qgsserverstreamingdevice.h"
#include "qgsaccesscontrol.h"
#include "qgsfeaturerequest.h"
#include <QImage>
#include <QPainter>
#include <QStringList>
#include <QTemporaryFile>
#include <QTextStream>
#include <QDir>
//for printing
#include "qgscomposition.h"
#include <QBuffer>
#include <QPrinter>
#include <QSvgGenerator>
#include <QUrl>
#include <QPaintEngine>
QgsWMSServer::QgsWMSServer(
const QString& configFilePath
, QMap<QString, QString> ¶meters
, QgsWMSConfigParser* cp
, QgsRequestHandler* rh
, QgsMapRenderer* renderer
, QgsCapabilitiesCache* capCache
#ifdef HAVE_SERVER_PYTHON_PLUGINS
, const QgsAccessControl* accessControl
#endif
)
: QgsOWSServer(
configFilePath
, parameters
, rh
#ifdef HAVE_SERVER_PYTHON_PLUGINS
, accessControl
#endif
)
, mMapRenderer( renderer )
, mCapabilitiesCache( capCache )
, mConfigParser( cp )
, mOwnsConfigParser( false )
, mDrawLegendLayerLabel( true )
, mDrawLegendItemLabel( true )
{
#ifdef HAVE_SERVER_PYTHON_PLUGINS
mMapRenderer->setFeatureFilterProvider( mAccessControl );
#endif
}
QgsWMSServer::QgsWMSServer()
: QgsOWSServer(
QString()
, QMap<QString, QString>()
, nullptr
#ifdef HAVE_SERVER_PYTHON_PLUGINS
, nullptr
#endif
)
, mMapRenderer( nullptr )
, mCapabilitiesCache()
, mConfigParser( nullptr )
, mOwnsConfigParser( false )
, mDrawLegendLayerLabel( true )
, mDrawLegendItemLabel( true )
{
}
QgsWMSServer::~QgsWMSServer()
{
}
void QgsWMSServer::cleanupAfterRequest()
{
if ( mOwnsConfigParser )
{
delete mConfigParser;
mConfigParser = nullptr;
mOwnsConfigParser = false;
}
}
void QgsWMSServer::executeRequest()
{
if ( !mMapRenderer || !mConfigParser || !mRequestHandler || !mCapabilitiesCache )
{
return; //TODO: error handling
}
//request type
QString request = mParameters.value( "REQUEST" );
if ( request.isEmpty() )
{
QgsMessageLog::logMessage( "unable to find 'REQUEST' parameter, exiting..." );
mRequestHandler->setServiceException( QgsMapServiceException( "OperationNotSupported", "Please check the value of the REQUEST parameter" ) );
cleanupAfterRequest();
return;
}
//version
QString version = mParameters.value( "VERSION", "1.3.0" );
bool getProjectSettings = ( request.compare( "GetProjectSettings", Qt::CaseInsensitive ) == 0 );
if ( getProjectSettings )
{
version = "1.3.0"; //getProjectSettings extends WMS 1.3.0 capabilities
}
//GetCapabilities
if ( request.compare( "GetCapabilities", Qt::CaseInsensitive ) == 0 || getProjectSettings )
{
QStringList cacheKeyList;
cacheKeyList << ( getProjectSettings ? "projectSettings" : version );
bool cache = true;
#ifdef HAVE_SERVER_PYTHON_PLUGINS
cache = mAccessControl->fillCacheKey( cacheKeyList );
#endif
QString cacheKey = cacheKeyList.join( "-" );
const QDomDocument* capabilitiesDocument = mCapabilitiesCache->searchCapabilitiesDocument( mConfigFilePath, cacheKey );
if ( !capabilitiesDocument ) //capabilities xml not in cache. Create a new one
{
QgsMessageLog::logMessage( "Capabilities document not found in cache" );
QDomDocument doc;
try
{
doc = getCapabilities( version, getProjectSettings );
}
catch ( QgsMapServiceException& ex )
{
mRequestHandler->setServiceException( ex );
cleanupAfterRequest();
return;
}
if ( cache )
{
mCapabilitiesCache->insertCapabilitiesDocument( mConfigFilePath, cacheKey, &doc );
capabilitiesDocument = mCapabilitiesCache->searchCapabilitiesDocument( mConfigFilePath, cacheKey );
}
else
{
doc = doc.cloneNode().toDocument();
capabilitiesDocument = &doc;
}
}
else
{
QgsMessageLog::logMessage( "Found capabilities document in cache" );
}
if ( capabilitiesDocument )
{
mRequestHandler->setGetCapabilitiesResponse( *capabilitiesDocument );
}
}
//GetMap
else if ( request.compare( "GetMap", Qt::CaseInsensitive ) == 0 )
{
//export as dxf
QString format = mParameters.value( "FORMAT" );
if ( format.compare( "application/dxf", Qt::CaseInsensitive ) == 0 )
{
try
{
getMapAsDxf();
cleanupAfterRequest();
return;
}
catch ( QgsMapServiceException& ex )
{
QgsMessageLog::logMessage( "Caught exception during GetMap request" );
mRequestHandler->setServiceException( ex );
cleanupAfterRequest();
return;
}
}
QImage* result = nullptr;
try
{
result = getMap();
}
catch ( QgsMapServiceException& ex )
{
QgsMessageLog::logMessage( "Caught exception during GetMap request" );
mRequestHandler->setServiceException( ex );
cleanupAfterRequest();
return;
}
if ( result )
{
QgsMessageLog::logMessage( "Setting GetMap response" );
mRequestHandler->setGetMapResponse( "WMS", result, getImageQuality() );
QgsMessageLog::logMessage( "Response sent" );
}
else
{
//do some error handling
QgsMessageLog::logMessage( "result image is 0" );
}
delete result;
}
//GetFeatureInfo
else if ( request.compare( "GetFeatureInfo", Qt::CaseInsensitive ) == 0 )
{
QDomDocument featureInfoDoc;
try
{
if ( getFeatureInfo( featureInfoDoc, version ) != 0 )
{
cleanupAfterRequest();
return;
}
}
catch ( QgsMapServiceException& ex )
{
mRequestHandler->setServiceException( ex );
cleanupAfterRequest();
return;
}
QString infoFormat = mParameters.value( "INFO_FORMAT", "text/plain" );
mRequestHandler->setGetFeatureInfoResponse( featureInfoDoc, infoFormat );
}
//GetContext
else if ( request.compare( "GetContext", Qt::CaseInsensitive ) == 0 )
{
try
{
QDomDocument doc = getContext();
mRequestHandler->setXmlResponse( doc );
}
catch ( QgsMapServiceException& ex )
{
mRequestHandler->setServiceException( ex );
}
}
//GetSchemaExtension
else if ( request.compare( "GetSchemaExtension", Qt::CaseInsensitive ) == 0 )
{
try
{
QDomDocument doc = getSchemaExtension();
mRequestHandler->setXmlResponse( doc );
}
catch ( QgsMapServiceException& ex )
{
mRequestHandler->setServiceException( ex );
}
}
//GetStyle for compatibility with earlier QGIS versions
else if ( request.compare( "GetStyle", Qt::CaseInsensitive ) == 0 )
{
try
{
QDomDocument doc = getStyle();
mRequestHandler->setXmlResponse( doc );
}
catch ( QgsMapServiceException& ex )
{
mRequestHandler->setServiceException( ex );
}
}
//GetStyles
else if ( request.compare( "GetStyles", Qt::CaseInsensitive ) == 0 )
{
// GetStyles is defined for WMS1.1.1/SLD1.0
// and in qgis-server WMS1.3.0 extension
try
{
QDomDocument doc = getStyles();
mRequestHandler->setXmlResponse( doc );
}
catch ( QgsMapServiceException& ex )
{
mRequestHandler->setServiceException( ex );
}
}
//GetStyles
else if ( request.compare( "DescribeLayer", Qt::CaseInsensitive ) == 0 )
{
// DescribeLayer is defined for WMS1.1.1/SLD1.0
// and in qgis-server WMS1.3.0 extension
try
{
QDomDocument doc = describeLayer();
mRequestHandler->setXmlResponse( doc );
}
catch ( QgsMapServiceException& ex )
{
mRequestHandler->setServiceException( ex );
}
}
//GetLegendGraphic
else if ( request.compare( "GetLegendGraphic", Qt::CaseInsensitive ) == 0 ||
request.compare( "GetLegendGraphics", Qt::CaseInsensitive ) == 0 )
// GetLegendGraphics for compatibility with earlier QGIS versions
{
QImage* result = nullptr;
try
{
result = getLegendGraphics();
}
catch ( QgsMapServiceException& ex )
{
QgsMessageLog::logMessage( "Caught exception during GetLegendGraphic request" );
mRequestHandler->setServiceException( ex );
}
if ( result )
{
QgsMessageLog::logMessage( "Setting GetLegendGraphic response" );
//setting is the same for GetMap and GetLegendGraphic
mRequestHandler->setGetMapResponse( "WMS", result, getImageQuality() );
QgsMessageLog::logMessage( "Response sent" );
}
else
{
//do some error handling
QgsMessageLog::logMessage( "result image is 0" );
}
delete result;
}
//GetPrint
else if ( request.compare( "GetPrint", Qt::CaseInsensitive ) == 0 )
{
QByteArray* printOutput = nullptr;
try
{
printOutput = getPrint( mRequestHandler->format() );
}
catch ( QgsMapServiceException& ex )
{
mRequestHandler->setServiceException( ex );
}
if ( printOutput )
{
mRequestHandler->setGetPrintResponse( printOutput );
}
delete printOutput;
}
else//unknown request
{
QgsMapServiceException e( "OperationNotSupported", "Operation " + request + " not supported" );
mRequestHandler->setServiceException( e );
}
cleanupAfterRequest();
}
void QgsWMSServer::appendFormats( QDomDocument &doc, QDomElement &elem, const QStringList &formats )
{
Q_FOREACH ( const QString& format, formats )
{
QDomElement formatElem = doc.createElement( "Format"/*wms:Format*/ );
formatElem.appendChild( doc.createTextNode( format ) );
elem.appendChild( formatElem );
}
}
QDomDocument QgsWMSServer::getCapabilities( QString version, bool fullProjectInformation )
{
QgsMessageLog::logMessage( "Entering." );
QDomDocument doc;
QDomElement wmsCapabilitiesElement;
//Prepare url
QString hrefString;
if ( mConfigParser )
{
hrefString = mConfigParser->serviceUrl();
}
if ( hrefString.isEmpty() )
{
hrefString = serviceUrl();
}
//href needs to be a prefix
if ( !hrefString.endsWith( "?" ) && !hrefString.endsWith( "&" ) )
{
hrefString.append( hrefString.contains( "?" ) ? "&" : "?" );
}
if ( version == "1.1.1" )
{
doc = QDomDocument( "WMT_MS_Capabilities SYSTEM 'http://schemas.opengis.net/wms/1.1.1/WMS_MS_Capabilities.dtd'" ); //WMS 1.1.1 needs DOCTYPE "SYSTEM http://schemas.opengis.net/wms/1.1.1/WMS_MS_Capabilities.dtd"
addXMLDeclaration( doc );
wmsCapabilitiesElement = doc.createElement( "WMT_MS_Capabilities"/*wms:WMS_Capabilities*/ );
}
else // 1.3.0 as default
{
addXMLDeclaration( doc );
wmsCapabilitiesElement = doc.createElement( "WMS_Capabilities"/*wms:WMS_Capabilities*/ );
wmsCapabilitiesElement.setAttribute( "xmlns", "http://www.opengis.net/wms" );
wmsCapabilitiesElement.setAttribute( "xmlns:sld", "http://www.opengis.net/sld" );
wmsCapabilitiesElement.setAttribute( "xmlns:qgs", "http://www.qgis.org/wms" );
wmsCapabilitiesElement.setAttribute( "xmlns:xsi", "http://www.w3.org/2001/XMLSchema-instance" );
QString schemaLocation = "http://www.opengis.net/wms";
schemaLocation += " http://schemas.opengis.net/wms/1.3.0/capabilities_1_3_0.xsd";
schemaLocation += " http://www.opengis.net/sld";
schemaLocation += " http://schemas.opengis.net/sld/1.1.0/sld_capabilities.xsd";
schemaLocation += " http://www.qgis.org/wms";
if ( mConfigParser && mConfigParser->WMSInspireActivated() )
{
wmsCapabilitiesElement.setAttribute( "xmlns:inspire_common", "http://inspire.ec.europa.eu/schemas/common/1.0" );
wmsCapabilitiesElement.setAttribute( "xmlns:inspire_vs", "http://inspire.ec.europa.eu/schemas/inspire_vs/1.0" );
schemaLocation += " http://inspire.ec.europa.eu/schemas/inspire_vs/1.0";
schemaLocation += " http://inspire.ec.europa.eu/schemas/inspire_vs/1.0/inspire_vs.xsd";
}
schemaLocation += " " + hrefString + "SERVICE=WMS&REQUEST=GetSchemaExtension";
wmsCapabilitiesElement.setAttribute( "xsi:schemaLocation", schemaLocation );
}
wmsCapabilitiesElement.setAttribute( "version", version );
doc.appendChild( wmsCapabilitiesElement );
//todo: add service capabilities
if ( mConfigParser )
{
mConfigParser->serviceCapabilities( wmsCapabilitiesElement, doc );
}
//wms:Capability element
QDomElement capabilityElement = doc.createElement( "Capability"/*wms:Capability*/ );
wmsCapabilitiesElement.appendChild( capabilityElement );
//wms:Request element
QDomElement requestElement = doc.createElement( "Request"/*wms:Request*/ );
capabilityElement.appendChild( requestElement );
QDomElement dcpTypeElement = doc.createElement( "DCPType"/*wms:DCPType*/ );
QDomElement httpElement = doc.createElement( "HTTP"/*wms:HTTP*/ );
dcpTypeElement.appendChild( httpElement );
QDomElement elem;
//wms:GetCapabilities
elem = doc.createElement( "GetCapabilities"/*wms:GetCapabilities*/ );
appendFormats( doc, elem, QStringList() << ( version == "1.1.1" ? "application/vnd.ogc.wms_xml" : "text/xml" ) );
elem.appendChild( dcpTypeElement );
requestElement.appendChild( elem );
// SOAP platform
//only give this information if it is not a WMS request to be in sync with the WMS capabilities schema
QMap<QString, QString>::const_iterator service_it = mParameters.constFind( "SERVICE" );
if ( service_it != mParameters.constEnd() && service_it.value().compare( "WMS", Qt::CaseInsensitive ) != 0 )
{
QDomElement soapElement = doc.createElement( "SOAP"/*wms:SOAP*/ );
httpElement.appendChild( soapElement );
QDomElement soapResourceElement = doc.createElement( "OnlineResource"/*wms:OnlineResource*/ );
soapResourceElement.setAttribute( "xmlns:xlink", "http://www.w3.org/1999/xlink" );
soapResourceElement.setAttribute( "xlink:type", "simple" );
soapResourceElement.setAttribute( "xlink:href", hrefString );
soapElement.appendChild( soapResourceElement );
}
//only Get supported for the moment
QDomElement getElement = doc.createElement( "Get"/*wms:Get*/ );
httpElement.appendChild( getElement );
QDomElement olResourceElement = doc.createElement( "OnlineResource"/*wms:OnlineResource*/ );
olResourceElement.setAttribute( "xmlns:xlink", "http://www.w3.org/1999/xlink" );
olResourceElement.setAttribute( "xlink:type", "simple" );
olResourceElement.setAttribute( "xlink:href", hrefString );
getElement.appendChild( olResourceElement );
#if 0
// POST already used by SOAP
QDomElement postElement = doc.createElement( "post"/*wms:SOAP*/ );
httpElement.appendChild( postElement );
QDomElement postResourceElement = doc.createElement( "OnlineResource"/*wms:OnlineResource*/ );
postResourceElement.setAttribute( "xmlns:xlink", "http://www.w3.org/1999/xlink" );
postResourceElement.setAttribute( "xlink:type", "simple" );
postResourceElement.setAttribute( "xlink:href", "http://" + QString( getenv( "SERVER_NAME" ) ) + QString( getenv( "REQUEST_URI" ) ) );
postElement.appendChild( postResourceElement );
dcpTypeElement.appendChild( postElement );
#endif
//wms:GetMap
elem = doc.createElement( "GetMap"/*wms:GetMap*/ );
appendFormats( doc, elem, QStringList() << "image/jpeg" << "image/png" << "image/png; mode=16bit" << "image/png; mode=8bit" << "image/png; mode=1bit" << "application/dxf" );
elem.appendChild( dcpTypeElement.cloneNode().toElement() ); //this is the same as for 'GetCapabilities'
requestElement.appendChild( elem );
//wms:GetFeatureInfo
elem = doc.createElement( "GetFeatureInfo" );
appendFormats( doc, elem, QStringList() << "text/plain" << "text/html" << "text/xml" << "application/vnd.ogc.gml" << "application/vnd.ogc.gml/3.1.1" );
elem.appendChild( dcpTypeElement.cloneNode().toElement() ); //this is the same as for 'GetCapabilities'
requestElement.appendChild( elem );
//wms:GetLegendGraphic
elem = doc.createElement(( version == "1.1.1" ? "GetLegendGraphic" : "sld:GetLegendGraphic" )/*wms:GetLegendGraphic*/ );
appendFormats( doc, elem, QStringList() << "image/jpeg" << "image/png" );
elem.appendChild( dcpTypeElement.cloneNode().toElement() ); // this is the same as for 'GetCapabilities'
requestElement.appendChild( elem );
//wms:DescribeLayer
elem = doc.createElement(( version == "1.1.1" ? "DescribeLayer" : "sld:DescribeLayer" )/*wms:GetLegendGraphic*/ );
appendFormats( doc, elem, QStringList() << "text/xml" );
elem.appendChild( dcpTypeElement.cloneNode().toElement() ); // this is the same as for 'GetCapabilities'
requestElement.appendChild( elem );
//wms:GetStyles
elem = doc.createElement(( version == "1.1.1" ? "GetStyles" : "qgs:GetStyles" )/*wms:GetStyles*/ );
appendFormats( doc, elem, QStringList() << "text/xml" );
elem.appendChild( dcpTypeElement.cloneNode().toElement() ); //this is the same as for 'GetCapabilities'
requestElement.appendChild( elem );
if ( fullProjectInformation ) //remove composer templates from GetCapabilities in the long term
{
//wms:GetPrint
elem = doc.createElement( "GetPrint" /*wms:GetPrint*/ );
appendFormats( doc, elem, QStringList() << "svg" << "png" << "pdf" );
elem.appendChild( dcpTypeElement.cloneNode().toElement() ); //this is the same as for 'GetCapabilities'
requestElement.appendChild( elem );
}
//Exception element is mandatory
elem = doc.createElement( "Exception" );
appendFormats( doc, elem, QStringList() << ( version == "1.1.1" ? "application/vnd.ogc.se_xml" : "XML" ) );
capabilityElement.appendChild( elem );
//UserDefinedSymbolization element
if ( version == "1.3.0" )
{
elem = doc.createElement( "sld:UserDefinedSymbolization" );
elem.setAttribute( "SupportSLD", "1" );
elem.setAttribute( "UserLayer", "0" );
elem.setAttribute( "UserStyle", "1" );
elem.setAttribute( "RemoteWFS", "0" );
elem.setAttribute( "InlineFeature", "0" );
elem.setAttribute( "RemoteWCS", "0" );
capabilityElement.appendChild( elem );
if ( mConfigParser && mConfigParser->WMSInspireActivated() )
{
mConfigParser->inspireCapabilities( capabilityElement, doc );
}
}
if ( mConfigParser && fullProjectInformation ) //remove composer templates from GetCapabilities in the long term
{
//Insert <ComposerTemplate> elements derived from wms:_ExtendedCapabilities
mConfigParser->printCapabilities( capabilityElement, doc );
}
if ( mConfigParser && fullProjectInformation )
{
//WFS layers
QStringList wfsLayers = mConfigParser->wfsLayerNames();
if ( !wfsLayers.isEmpty() )
{
QDomElement wfsLayersElem = doc.createElement( "WFSLayers" );
QStringList::const_iterator wfsIt = wfsLayers.constBegin();
for ( ; wfsIt != wfsLayers.constEnd(); ++wfsIt )
{
QDomElement wfsLayerElem = doc.createElement( "WFSLayer" );
wfsLayerElem.setAttribute( "name", *wfsIt );
wfsLayersElem.appendChild( wfsLayerElem );
}
capabilityElement.appendChild( wfsLayersElem );
}
}
//add the xml content for the individual layers/styles
QgsMessageLog::logMessage( "calling layersAndStylesCapabilities" );
if ( mConfigParser )
{
mConfigParser->layersAndStylesCapabilities( capabilityElement, doc, version, fullProjectInformation );
}
QgsMessageLog::logMessage( "layersAndStylesCapabilities returned" );
#if 0
//for debugging: save the document to disk
QFile capabilitiesFile( QDir::tempPath() + "/capabilities.txt" );
if ( capabilitiesFile.open( QIODevice::WriteOnly | QIODevice::Text ) )
{
QTextStream capabilitiesStream( &capabilitiesFile );
doc.save( capabilitiesStream, 4 );
}
#endif
return doc;
}
QDomDocument QgsWMSServer::getContext()
{
QDomDocument doc;
addXMLDeclaration( doc );
QDomElement owsContextElem = doc.createElement( "OWSContext" );
owsContextElem.setAttribute( "xmlns", "http://www.opengis.net/ows-context" );
owsContextElem.setAttribute( "xmlns:ows-context", "http://www.opengis.net/ows-context" );
owsContextElem.setAttribute( "xmlns:context", "http://www.opengis.net/context" );
owsContextElem.setAttribute( "xmlns:ows", "http://www.opengis.net/ows" );
owsContextElem.setAttribute( "xmlns:sld", "http://www.opengis.net/sld" );
owsContextElem.setAttribute( "xmlns:ogc", "http://www.opengis.net/ogc" );
owsContextElem.setAttribute( "xmlns:gml", "http://www.opengis.net/gml" );
owsContextElem.setAttribute( "xmlns:kml", "http://www.opengis.net/kml/2.2" );
owsContextElem.setAttribute( "xmlns:xlink", "http://www.w3.org/1999/xlink" );
owsContextElem.setAttribute( "xmlns:ns9", "http://www.w3.org/2005/Atom" );
owsContextElem.setAttribute( "xmlns:xal", "urn:oasis:names:tc:ciq:xsdschema:xAL:2.0" );
owsContextElem.setAttribute( "xmlns:ins", "http://www.inspire.org" );
owsContextElem.setAttribute( "version", "0.3.1" );
doc.appendChild( owsContextElem );
if ( mConfigParser )
{
//Prepare url
QString hrefString = mConfigParser->serviceUrl();
if ( hrefString.isEmpty() )
{
hrefString = serviceUrl();
}
mConfigParser->owsGeneralAndResourceList( owsContextElem, doc, hrefString );
}
return doc;
}
static QgsLayerTreeModelLegendNode* _findLegendNodeForRule( QgsLayerTreeModel* legendModel, const QString& rule )
{
Q_FOREACH ( QgsLayerTreeLayer* nodeLayer, legendModel->rootGroup()->findLayers() )
{
Q_FOREACH ( QgsLayerTreeModelLegendNode* legendNode, legendModel->layerLegendNodes( nodeLayer ) )
{
if ( legendNode->data( Qt::DisplayRole ).toString() == rule )
return legendNode;
}
}
return nullptr;
}
static QgsRectangle _parseBBOX( const QString &bboxStr, bool &ok )
{
ok = false;
QStringList lst = bboxStr.split( "," );
if ( lst.count() != 4 )
return QgsRectangle();
double d[4];
for ( int i = 0; i < 4; i++ )
{
bool ok;
lst[i].replace( " ", "+" );
d[i] = lst[i].toDouble( &ok );
if ( !ok )
return QgsRectangle();
}
ok = true;
if ( d[2] <= d[0] || d[3] <= d[1] )
{
throw QgsMapServiceException( "InvalidParameterValue", "BBOX is empty" );
}
return QgsRectangle( d[0], d[1], d[2], d[3] );
}
QImage* QgsWMSServer::getLegendGraphics()
{
if ( !mConfigParser || !mMapRenderer )
{
return nullptr;
}
if ( !mParameters.contains( "LAYER" ) && !mParameters.contains( "LAYERS" ) )
{
throw QgsMapServiceException( "LayerNotSpecified", "LAYER is mandatory for GetLegendGraphic operation" );
}
if ( !mParameters.contains( "FORMAT" ) )
{
throw QgsMapServiceException( "FormatNotSpecified", "FORMAT is mandatory for GetLegendGraphic operation" );
}
bool contentBasedLegend = false;
QgsRectangle contentBasedLegendExtent;
if ( mParameters.contains( "BBOX" ) )
{
contentBasedLegend = true;
bool bboxOk;
contentBasedLegendExtent = _parseBBOX( mParameters["BBOX"], bboxOk );
if ( !bboxOk || contentBasedLegendExtent.isEmpty() )
throw QgsMapServiceException( "InvalidParameterValue", "Invalid BBOX parameter" );
if ( mParameters.contains( "RULE" ) )
throw QgsMapServiceException( "InvalidParameterValue", "BBOX parameter cannot be combined with RULE" );
}
QStringList layersList, stylesList;
if ( readLayersAndStyles( layersList, stylesList ) != 0 )
{
QgsMessageLog::logMessage( "error reading layers and styles" );
return nullptr;
}
if ( layersList.size() < 1 )
{
return nullptr;
}
//scale
double scaleDenominator = -1;
QMap<QString, QString>::const_iterator scaleIt = mParameters.constFind( "SCALE" );
if ( scaleIt != mParameters.constEnd() )
{
bool conversionSuccess;
double scaleValue = scaleIt.value().toDouble( &conversionSuccess );
if ( conversionSuccess )
{
scaleDenominator = scaleValue;
}
}
QgsCoordinateReferenceSystem dummyCRS;
QStringList layerIds = layerSet( layersList, stylesList, dummyCRS, scaleDenominator );
if ( layerIds.size() < 1 )
{
return nullptr;
}
//get icon size, spaces between legend items and font from config parser
double boxSpace, layerSpace, layerTitleSpace, symbolSpace, iconLabelSpace, symbolWidth, symbolHeight;
QFont layerFont, itemFont;
QColor layerFontColor, itemFontColor;
legendParameters( boxSpace, layerSpace, layerTitleSpace, symbolSpace,
iconLabelSpace, symbolWidth, symbolHeight, layerFont, itemFont, layerFontColor, itemFontColor );
QString rule;
int ruleSymbolWidth = 0, ruleSymbolHeight = 0;
QMap<QString, QString>::const_iterator ruleIt = mParameters.constFind( "RULE" );
if ( ruleIt != mParameters.constEnd() )
{
rule = ruleIt.value();
QMap<QString, QString>::const_iterator widthIt = mParameters.constFind( "WIDTH" );
if ( widthIt != mParameters.constEnd() )
{
bool conversionSuccess;
double width = widthIt.value().toDouble( &conversionSuccess );
if ( conversionSuccess )
{
ruleSymbolWidth = width;
}
}
QMap<QString, QString>::const_iterator heightIt = mParameters.constFind( "HEIGHT" );
if ( heightIt != mParameters.constEnd() )
{
bool conversionSuccess;
double width = heightIt.value().toDouble( &conversionSuccess );
if ( conversionSuccess )
{
ruleSymbolHeight = width;
}
}
}
// Checks showFeatureCount parameter
bool showFeatureCount = false;
if ( mParameters.contains( "SHOWFEATURECOUNT" ) )
showFeatureCount = QVariant( mParameters[ "SHOWFEATURECOUNT" ] ).toBool();
// Create the layer tree root
QgsLayerTreeGroup rootGroup;
// Store layers' name to reset them
QMap<QString, QString> layerNameMap;
// Create tree layer node for each layer
Q_FOREACH ( const QString& layerId, layerIds )
{
// get layer
QgsMapLayer *ml = QgsMapLayerRegistry::instance()->mapLayer( layerId );
// create tree layer node
QgsLayerTreeLayer *layer = rootGroup.addLayer( ml );
// store the layer's name
layerNameMap.insert( layerId, ml->name() );
// set layer name with layer's title to have it in legend
if ( !ml->title().isEmpty() )
layer->setLayerName( ml->title() );
// set show feature count
if ( showFeatureCount )
layer->setCustomProperty( "showFeatureCount", showFeatureCount );
}
QgsLayerTreeModel legendModel( &rootGroup );
QList<QgsLayerTreeNode*> rootChildren = rootGroup.children();
if ( scaleDenominator > 0 )
legendModel.setLegendFilterByScale( scaleDenominator );
if ( contentBasedLegend )
{
HitTest hitTest;
getMap( &hitTest );
Q_FOREACH ( QgsLayerTreeNode* node, rootGroup.children() )
{
Q_ASSERT( QgsLayerTree::isLayer( node ) );
QgsLayerTreeLayer* nodeLayer = QgsLayerTree::toLayer( node );
QgsVectorLayer* vl = qobject_cast<QgsVectorLayer*>( nodeLayer->layer() );
if ( !vl || !vl->rendererV2() )
continue;
const SymbolV2Set& usedSymbols = hitTest[vl];
QList<int> order;
int i = 0;
Q_FOREACH ( const QgsLegendSymbolItemV2& legendItem, vl->rendererV2()->legendSymbolItemsV2() )
{
if ( usedSymbols.contains( legendItem.legacyRuleKey() ) )
order.append( i );
++i;
}
// either remove the whole layer or just filter out some items
if ( order.isEmpty() )
rootGroup.removeChildNode( nodeLayer );
else
{
QgsMapLayerLegendUtils::setLegendNodeOrder( nodeLayer, order );
legendModel.refreshLayerLegend( nodeLayer );
}
}
}
// find out DPI
QImage* tmpImage = createImage( 1, 1 );
if ( !tmpImage )
return nullptr;
qreal dpmm = tmpImage->dotsPerMeterX() / 1000.0;
delete tmpImage;
// setup legend configuration
QgsLegendSettings legendSettings;
legendSettings.setTitle( QString() );
legendSettings.setBoxSpace( boxSpace );
legendSettings.rstyle( QgsComposerLegendStyle::Subgroup ).setMargin( QgsComposerLegendStyle::Top, layerSpace );
// TODO: not available: layer title space
legendSettings.rstyle( QgsComposerLegendStyle::Symbol ).setMargin( QgsComposerLegendStyle::Top, symbolSpace );
legendSettings.rstyle( QgsComposerLegendStyle::SymbolLabel ).setMargin( QgsComposerLegendStyle::Left, iconLabelSpace );
legendSettings.setSymbolSize( QSizeF( symbolWidth, symbolHeight ) );
legendSettings.rstyle( QgsComposerLegendStyle::Subgroup ).setFont( layerFont );
legendSettings.rstyle( QgsComposerLegendStyle::SymbolLabel ).setFont( itemFont );
// TODO: not available: layer font color
legendSettings.setFontColor( itemFontColor );
if ( contentBasedLegend )
{
legendSettings.setMapScale( mMapRenderer->scale() );
double scaleFactor = mMapRenderer->outputUnits() == QgsMapRenderer::Millimeters ? mMapRenderer->outputDpi() / 25.4 : 1.0;
legendSettings.setMmPerMapUnit( 1 / ( mMapRenderer->mapUnitsPerPixel() * scaleFactor ) );
}
if ( !rule.isEmpty() )
{
//create second image with the right dimensions
QImage* paintImage = createImage( ruleSymbolWidth, ruleSymbolHeight );
//go through the items a second time for painting
QPainter p( paintImage );
p.setRenderHint( QPainter::Antialiasing, true );
p.scale( dpmm, dpmm );
QgsLayerTreeModelLegendNode* legendNode = _findLegendNodeForRule( &legendModel, rule );
if ( legendNode )
{
QgsLayerTreeModelLegendNode::ItemContext ctx;
ctx.painter = &p;
ctx.labelXOffset = 0;
ctx.point = QPointF();
double itemHeight = ruleSymbolHeight / dpmm;
legendNode->drawSymbol( legendSettings, &ctx, itemHeight );
}
QgsMapLayerRegistry::instance()->removeAllMapLayers();
return paintImage;
}
Q_FOREACH ( QgsLayerTreeNode* node, rootChildren )
{
if ( QgsLayerTree::isLayer( node ) )
{
QgsLayerTreeLayer* nodeLayer = QgsLayerTree::toLayer( node );
#ifdef HAVE_SERVER_PYTHON_PLUGINS
if ( !mAccessControl->layerReadPermission( nodeLayer->layer() ) )
{
throw QgsMapServiceException( "Security", "You are not allowed to access to the layer: " + nodeLayer->layer()->name() );
}
#endif
// layer titles - hidden or not
QgsLegendRenderer::setNodeLegendStyle( nodeLayer, mDrawLegendLayerLabel ? QgsComposerLegendStyle::Subgroup : QgsComposerLegendStyle::Hidden );
// rule item titles
if ( !mDrawLegendItemLabel )
{
Q_FOREACH ( QgsLayerTreeModelLegendNode* legendNode, legendModel.layerLegendNodes( nodeLayer ) )
{
legendNode->setUserLabel( " " ); // empty string = no override, so let's use one space
}
}
else if ( !mDrawLegendLayerLabel )
{
Q_FOREACH ( QgsLayerTreeModelLegendNode* legendNode, legendModel.layerLegendNodes( nodeLayer ) )
{
if ( legendNode->isEmbeddedInParent() )
legendNode->setEmbeddedInParent( false );
}
}
}
}
QgsLegendRenderer legendRenderer( &legendModel, legendSettings );
QSizeF minSize = legendRenderer.minimumSize();
QSize s( minSize.width() * dpmm, minSize.height() * dpmm );
QImage* paintImage = createImage( s.width(), s.height() );
QPainter p( paintImage );
p.setRenderHint( QPainter::Antialiasing, true );
p.scale( dpmm, dpmm );
legendRenderer.drawLegend( &p );
p.end();
// reset layers' name
Q_FOREACH ( const QString& layerId, layerIds )
{
QgsMapLayer *ml = QgsMapLayerRegistry::instance()->mapLayer( layerId );
ml->setName( layerNameMap[ layerId ] );
}
// clear map layer registry
QgsMapLayerRegistry::instance()->removeAllMapLayers();
return paintImage;
}
void QgsWMSServer::runHitTest( QPainter* painter, HitTest& hitTest )
{
QPaintDevice* thePaintDevice = painter->device();
// setup QgsRenderContext in the same way as QgsMapRenderer does
QgsRenderContext context;
context.setPainter( painter ); // we are not going to draw anything, but we still need a working painter
context.setRenderingStopped( false );
context.setRasterScaleFactor(( thePaintDevice->logicalDpiX() + thePaintDevice->logicalDpiY() ) / 2.0 / mMapRenderer->outputDpi() );
context.setScaleFactor( mMapRenderer->outputUnits() == QgsMapRenderer::Millimeters ? mMapRenderer->outputDpi() / 25.4 : 1.0 );
context.setRendererScale( mMapRenderer->scale() );
context.setMapToPixel( *mMapRenderer->coordinateTransform() );