Add QgsSLDConfigParser and create calss QgsConfigParserUtils for part…

…s which are common between project parser and sld parser
qgis · Mar 30, 2014 · b4f21e2 · b4f21e2
1 parent e490991
commit b4f21e2
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Showing 10 changed files with 1,855 additions and 169 deletions.
diff --git a/src/mapserver/CMakeLists.txt b/src/mapserver/CMakeLists.txt
@@ -44,6 +44,8 @@ SET ( qgis_mapserv_SRCS
   qgswfsprojectparser.cpp
   qgswmsprojectparser.cpp
   qgsserverprojectparser.cpp
+  qgssldconfigparser.cpp
+  qgsconfigparserutils.cpp
   )
 
 # SET (qgis_mapserv_UIS 

diff --git a/src/mapserver/qgsconfigparserutils.cpp b/src/mapserver/qgsconfigparserutils.cpp
@@ -0,0 +1,186 @@
+/***************************************************************************
+                              qgsconfigparserutils.cpp
+                              ------------------------
+  begin                : March 28, 2014
+  copyright            : (C) 2014 by Marco Hugentobler
+  email                : marco dot hugentobler at sourcepole 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 "qgsconfigparserutils.h"
+#include "qgsapplication.h"
+#include "qgscoordinatereferencesystem.h"
+#include "qgscoordinatetransform.h"
+#include "qgscrscache.h"
+#include "qgsmaplayer.h"
+#include "qgsrectangle.h"
+
+#include <QDomDocument>
+#include <QDomElement>
+#include <QString>
+
+#include <sqlite3.h>
+
+class QgsCoordinateReferenceSystem;
+class QgsRectangle;
+class QDomDocument;
+class QDomElement;
+class QString;
+class QStringList;
+
+void QgsConfigParserUtils::appendCRSElementsToLayer( QDomElement& layerElement, QDomDocument& doc,
+    const QStringList &crsList, const QStringList& constrainedCrsList )
+{
+  if ( layerElement.isNull() )
+  {
+    return;
+  }
+
+  //insert the CRS elements after the title element to be in accordance with the WMS 1.3 specification
+  QDomElement titleElement = layerElement.firstChildElement( "Title" );
+  QDomElement abstractElement = layerElement.firstChildElement( "Abstract" );
+  QDomElement CRSPrecedingElement = abstractElement.isNull() ? titleElement : abstractElement; //last element before the CRS elements
+
+  //In case the number of advertised CRS is constrained
+  if ( constrainedCrsList.size() > 0 )
+  {
+    for ( int i = constrainedCrsList.size() - 1; i >= 0; --i )
+    {
+      appendCRSElementToLayer( layerElement, CRSPrecedingElement, constrainedCrsList.at( i ), doc );
+    }
+  }
+  else //no crs constraint
+  {
+    foreach ( QString crs, crsList )
+    {
+      appendCRSElementToLayer( layerElement, CRSPrecedingElement, crs, doc );
+    }
+  }
+}
+
+void QgsConfigParserUtils::appendCRSElementToLayer( QDomElement& layerElement, const QDomElement& precedingElement,
+    const QString& crsText, QDomDocument& doc )
+{
+  QString version = doc.documentElement().attribute( "version" );
+  QDomElement crsElement = doc.createElement( version == "1.1.1" ? "SRS" : "CRS" );
+  QDomText crsTextNode = doc.createTextNode( crsText );
+  crsElement.appendChild( crsTextNode );
+  layerElement.insertAfter( crsElement, precedingElement );
+}
+
+void QgsConfigParserUtils::appendLayerBoundingBoxes( QDomElement& layerElem, QDomDocument& doc, const QgsRectangle& layerExtent,
+    const QgsCoordinateReferenceSystem& layerCRS )
+{
+  if ( layerElem.isNull() )
+  {
+    return;
+  }
+
+  const QgsCoordinateReferenceSystem& wgs84 = QgsCRSCache::instance()->crsByAuthId( GEO_EPSG_CRS_AUTHID );
+
+  QString version = doc.documentElement().attribute( "version" );
+
+  //Ex_GeographicBoundingBox
+  QDomElement ExGeoBBoxElement;
+  //transform the layers native CRS into WGS84
+  QgsCoordinateTransform exGeoTransform( layerCRS, wgs84 );
+  QgsRectangle wgs84BoundingRect = exGeoTransform.transformBoundingBox( layerExtent );
+  if ( version == "1.1.1" )   // WMS Version 1.1.1
+  {
+    ExGeoBBoxElement = doc.createElement( "LatLonBoundingBox" );
+    ExGeoBBoxElement.setAttribute( "minx", QString::number( wgs84BoundingRect.xMinimum() ) );
+    ExGeoBBoxElement.setAttribute( "maxx", QString::number( wgs84BoundingRect.xMaximum() ) );
+    ExGeoBBoxElement.setAttribute( "miny", QString::number( wgs84BoundingRect.yMinimum() ) );
+    ExGeoBBoxElement.setAttribute( "maxy", QString::number( wgs84BoundingRect.yMaximum() ) );
+  }
+  else // WMS Version 1.3.0
+  {
+    ExGeoBBoxElement = doc.createElement( "EX_GeographicBoundingBox" );
+    QDomElement wBoundLongitudeElement = doc.createElement( "westBoundLongitude" );
+    QDomText wBoundLongitudeText = doc.createTextNode( QString::number( wgs84BoundingRect.xMinimum() ) );
+    wBoundLongitudeElement.appendChild( wBoundLongitudeText );
+    ExGeoBBoxElement.appendChild( wBoundLongitudeElement );
+    QDomElement eBoundLongitudeElement = doc.createElement( "eastBoundLongitude" );
+    QDomText eBoundLongitudeText = doc.createTextNode( QString::number( wgs84BoundingRect.xMaximum() ) );
+    eBoundLongitudeElement.appendChild( eBoundLongitudeText );
+    ExGeoBBoxElement.appendChild( eBoundLongitudeElement );
+    QDomElement sBoundLatitudeElement = doc.createElement( "southBoundLatitude" );
+    QDomText sBoundLatitudeText = doc.createTextNode( QString::number( wgs84BoundingRect.yMinimum() ) );
+    sBoundLatitudeElement.appendChild( sBoundLatitudeText );
+    ExGeoBBoxElement.appendChild( sBoundLatitudeElement );
+    QDomElement nBoundLatitudeElement = doc.createElement( "northBoundLatitude" );
+    QDomText nBoundLatitudeText = doc.createTextNode( QString::number( wgs84BoundingRect.yMaximum() ) );
+    nBoundLatitudeElement.appendChild( nBoundLatitudeText );
+    ExGeoBBoxElement.appendChild( nBoundLatitudeElement );
+  }
+
+
+  //BoundingBox element
+  QDomElement bBoxElement = doc.createElement( "BoundingBox" );
+  if ( layerCRS.isValid() )
+  {
+    bBoxElement.setAttribute( version == "1.1.1" ? "SRS" : "CRS", layerCRS.authid() );
+  }
+
+  QgsRectangle r( layerExtent );
+  if ( version != "1.1.1" && layerCRS.axisInverted() )
+  {
+    r.invert();
+  }
+
+  bBoxElement.setAttribute( "minx", QString::number( r.xMinimum() ) );
+  bBoxElement.setAttribute( "miny", QString::number( r.yMinimum() ) );
+  bBoxElement.setAttribute( "maxx", QString::number( r.xMaximum() ) );
+  bBoxElement.setAttribute( "maxy", QString::number( r.yMaximum() ) );
+
+  QDomElement lastCRSElem = layerElem.lastChildElement( version == "1.1.1" ? "SRS" : "CRS" );
+  if ( !lastCRSElem.isNull() )
+  {
+    layerElem.insertAfter( ExGeoBBoxElement, lastCRSElem );
+    layerElem.insertAfter( bBoxElement, ExGeoBBoxElement );
+  }
+  else
+  {
+    layerElem.appendChild( ExGeoBBoxElement );
+    layerElem.appendChild( bBoxElement );
+  }
+}
+
+QStringList QgsConfigParserUtils::createCRSListForLayer( QgsMapLayer* theMapLayer )
+{
+  QStringList crsNumbers;
+  QString myDatabaseFileName = QgsApplication::srsDbFilePath();
+  sqlite3      *myDatabase;
+  const char   *myTail;
+  sqlite3_stmt *myPreparedStatement;
+  int           myResult;
+
+  //check the db is available
+  myResult = sqlite3_open( myDatabaseFileName.toLocal8Bit().data(), &myDatabase );
+  if ( myResult && theMapLayer )
+  {
+    //if the database cannot be opened, add at least the epsg number of the source coordinate system
+    crsNumbers.push_back( theMapLayer->crs().authid() );
+    return crsNumbers;
+  };
+  QString mySql = "select upper(auth_name||':'||auth_id) from tbl_srs";
+  myResult = sqlite3_prepare( myDatabase, mySql.toUtf8(), mySql.length(), &myPreparedStatement, &myTail );
+  if ( myResult == SQLITE_OK )
+  {
+    while ( sqlite3_step( myPreparedStatement ) == SQLITE_ROW )
+    {
+      crsNumbers.push_back( QString::fromUtf8(( char * )sqlite3_column_text( myPreparedStatement, 0 ) ) );
+    }
+  }
+  sqlite3_finalize( myPreparedStatement );
+  sqlite3_close( myDatabase );
+  return crsNumbers;
+}
diff --git a/src/mapserver/qgsconfigparserutils.h b/src/mapserver/qgsconfigparserutils.h
@@ -0,0 +1,43 @@
+/***************************************************************************
+                              qgsconfigparserutils.h
+                              ------------------------
+  begin                : March 28, 2014
+  copyright            : (C) 2014 by Marco Hugentobler
+  email                : marco dot hugentobler at sourcepole 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.                                   *
+ *                                                                         *
+ ***************************************************************************/
+
+#ifndef QGSCONFIGPARSERUTILS_H
+#define QGSCONFIGPARSERUTILS_H
+
+#include <QStringList>
+
+class QgsCoordinateReferenceSystem;
+class QgsMapLayer;
+class QgsRectangle;
+class QDomDocument;
+class QDomElement;
+class QString;
+
+class QgsConfigParserUtils
+{
+  public:
+    static void appendCRSElementsToLayer( QDomElement& layerElement, QDomDocument& doc, const QStringList &crsList,
+                                          const QStringList& constrainedCrsList );
+    static void appendCRSElementToLayer( QDomElement& layerElement, const QDomElement& precedingElement,
+                                         const QString& crsText, QDomDocument& doc );
+    static void appendLayerBoundingBoxes( QDomElement& layerElem, QDomDocument& doc, const QgsRectangle& layerExtent,
+                                          const QgsCoordinateReferenceSystem& layerCRS );
+    /**Returns a list of supported EPSG coordinate system numbers from a layer*/
+    static QStringList createCRSListForLayer( QgsMapLayer* theMapLayer );
+};
+
+#endif // QGSCONFIGPARSERUTILS_H