[FEATURE]: initial support for wms printing with GetPrint-Request

git-svn-id: http://svn.osgeo.org/qgis/trunk@14973 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: mhugent

src/mapserver/qgis_map_serv.cpp

@@ -382,6 +382,28 @@ int main( int argc, char * argv[] )
       continue;
 
     }
+    else if ( requestIt->second == "GetPrint" )
+    {
+      QByteArray* printOutput = 0;
+      QString formatString;
+      try
+      {
+        printOutput = theServer->getPrint( formatString );
+      }
+      catch ( QgsMapServiceException& ex )
+      {
+        theRequestHandler->sendServiceException( ex );
+      }
+
+      if ( printOutput )
+      {
+        theRequestHandler->sendGetPrintResponse( printOutput, formatString );
+      }
+      delete printOutput;
+      delete theRequestHandler;
+      delete theServer;
+      continue;
+    }
     else//unknown request
     {
       QgsMapServiceException e( "OperationNotSupported", "Operation " + requestIt->second + " not supported" );

src/mapserver/qgsconfigparser.cpp

@@ -17,6 +17,8 @@
 
 #include "qgsconfigparser.h"
 #include "qgsapplication.h"
+#include "qgscomposermap.h"
+#include "qgscomposition.h"
 #include "qgsrasterlayer.h"
 #include "qgsvectorlayer.h"
 #include <sqlite3.h>
@@ -269,3 +271,108 @@ void QgsConfigParser::appendCRSElementsToLayer( QDomElement& layerElement, QDomD
     layerElement.appendChild( crsElement );
   }
 }
+
+QgsComposition* QgsConfigParser::createPrintComposition( const QString& composerTemplate, QgsMapRenderer* mapRenderer, const QMap< QString, QString >& parameterMap ) const
+{
+  QList<QgsComposerMap*> composerMaps;
+  QList<QgsComposerLabel*> composerLabels;
+
+  QgsComposition* c = initComposition( composerTemplate, mapRenderer, composerMaps, composerLabels );
+  if ( !c )
+  {
+    return 0;
+  }
+
+  QMap< QString, QString >::const_iterator dpiIt = parameterMap.find( "DPI" );
+  if ( dpiIt != parameterMap.constEnd() )
+  {
+    c->setPrintResolution( dpiIt.value().toInt() );
+  }
+
+  //replace composer map parameters
+  QList<QgsComposerMap*>::iterator mapIt = composerMaps.begin();
+  QgsComposerMap* currentMap = 0;
+  for ( ; mapIt != composerMaps.end(); ++mapIt )
+  {
+    currentMap = *mapIt;
+    if ( !currentMap )
+    {
+      continue;
+    }
+
+    //search composer map title in parameter map-> string
+    QMap< QString, QString >::const_iterator titleIt = parameterMap.find( "MAP" + QString::number( currentMap->id() ) );
+    if ( titleIt == parameterMap.constEnd() )
+    {
+      continue;
+    }
+    QString replaceString = titleIt.value();
+    QStringList replacementList = replaceString.split( "/" );
+
+    //get map extent from string
+    if ( replacementList.size() > 0 )
+    {
+      QStringList coordList = replacementList.at( 0 ).split( "," );
+      if ( coordList.size() > 3 )
+      {
+        bool xMinOk, yMinOk, xMaxOk, yMaxOk;
+        double xmin = coordList.at( 0 ).toDouble( &xMinOk );
+        double ymin = coordList.at( 1 ).toDouble( &yMinOk );
+        double xmax = coordList.at( 2 ).toDouble( &xMaxOk );
+        double ymax = coordList.at( 3 ).toDouble( &yMaxOk );
+        if ( xMinOk && yMinOk && xMaxOk && yMaxOk )
+        {
+          currentMap->setNewExtent( QgsRectangle( xmin, ymin, xmax, ymax ) );
+        }
+      }
+    }
+
+    //get rotation from string
+    if ( replacementList.size() > 1 )
+    {
+      bool rotationOk;
+      double rotation = replacementList.at( 1 ).toDouble( &rotationOk );
+      if ( rotationOk )
+      {
+        currentMap->setMapRotation( rotation );
+      }
+    }
+
+    //get layer list from string
+    if ( replacementList.size() > 2 )
+    {
+      QStringList layerSet;
+      QStringList wmsLayerList = replacementList.at( 2 ).split( "," );
+      QStringList wmsStyleList;
+      if ( replacementList.size() > 3 )
+      {
+        wmsStyleList = replacementList.at( 3 ).split( "," );
+      }
+
+      for ( int i = 0; i < wmsLayerList.size(); ++i )
+      {
+        QString styleName;
+        if ( wmsStyleList.size() > i )
+        {
+          styleName = wmsStyleList.at( i );
+        }
+        QList<QgsMapLayer*> layerList = mapLayerFromStyle( wmsLayerList.at( i ), styleName );
+        QList<QgsMapLayer*>::const_iterator mapIdIt = layerList.constBegin();
+        for ( ; mapIdIt != layerList.constEnd(); ++mapIdIt )
+        {
+          if ( *mapIdIt )
+          {
+            layerSet.push_back(( *mapIdIt )->getLayerID() );
+          }
+        }
+      }
+
+      currentMap->setLayerSet( layerSet );
+      currentMap->setKeepLayerSet( true );
+    }
+  }
+
+  //replace composer label text
+
+  return c; //soon...
+}

src/mapserver/qgsconfigparser.h

@@ -24,6 +24,9 @@
 #include <QList>
 #include <QSet>
 
+class QgsComposition;
+class QgsComposerLabel;
+class QgsComposerMap;
 class QDomElement;
 
 /**Interface class for configuration parsing, e.g. SLD configuration or QGIS project file*/
@@ -56,6 +59,7 @@ class QgsConfigParser
 
     /**Sets fallback parser (does not take ownership)*/
     void setFallbackParser( QgsConfigParser* p );
+    const QgsConfigParser* fallbackParser() { return mFallbackParser; }
 
     void setScaleDenominator( double denom ) {mScaleDenominator = denom;}
 
@@ -88,6 +92,15 @@ class QgsConfigParser
     /**Returns information about vector attributes with hidden edit type. Key is layer id, value is a set containing the names of the hidden attributes*/
     virtual QMap< QString, QSet<QString> > hiddenAttributes() const { return QMap< QString, QSet<QString> >(); }
 
+    /**Creates a print composition, usually for a GetPrint request. Replaces map and label parameters*/
+    QgsComposition* createPrintComposition( const QString& composerTemplate, QgsMapRenderer* mapRenderer, const QMap< QString, QString >& parameterMap ) const;
+
+    /**Creates a composition from the project file (probably delegated to the fallback parser)*/
+    virtual QgsComposition* initComposition( const QString& composerTemplate, QgsMapRenderer* mapRenderer, QList< QgsComposerMap*>& mapList, QList< QgsComposerLabel* > labelList ) const = 0;
+
+    /**Adds print capabilities to xml document. ParentElem usually is the <Capabilities> element*/
+    virtual void printCapabilities( QDomElement& parentElement, QDomDocument& doc ) const = 0;
+
   protected:
     /**Parser to forward not resolved requests (e.g. SLD parser based on user request might have a fallback parser with admin configuration)*/
     QgsConfigParser* mFallbackParser;

src/mapserver/qgsgetrequesthandler.cpp

@@ -107,10 +107,6 @@ std::map<QString, QString> QgsGetRequestHandler::parseInput()
       {
         formatString = "PNG";
       }
-      else
-      {
-        throw QgsMapServiceException( "InvalidFormat", "Invalid format, only jpg and png are supported" );
-      }
       mFormat = formatString;
     }
   }
@@ -301,3 +297,8 @@ void QgsGetRequestHandler::sendServiceException( const QgsMapServiceException& e
   QByteArray ba = exceptionDoc.toByteArray();
   sendHttpResponse( &ba, "text/xml" );
 }
+
+void QgsGetRequestHandler::sendGetPrintResponse( QByteArray* ba, const QString& formatString ) const
+{
+  sendHttpResponse( ba, formatString );
+}

src/mapserver/qgsgetrequesthandler.h

@@ -29,4 +29,5 @@ class QgsGetRequestHandler: public QgsHttpRequestHandler
     void sendGetFeatureInfoResponse( const QDomDocument& infoDoc, const QString& infoFormat ) const;
     void sendServiceException( const QgsMapServiceException& ex ) const;
     void sendGetStyleResponse( const QDomDocument& doc ) const;
+    void sendGetPrintResponse( QByteArray* ba, const QString& formatString ) const;
 };

src/mapserver/qgsmslayercache.cpp

@@ -79,6 +79,7 @@ QgsMapLayer* QgsMSLayerCache::searchLayer( const QString& url, const QString& la
   QMap<QPair<QString, QString>, QgsMSLayerCacheEntry>::iterator it = mEntries.find( urlNamePair );
   if ( it == mEntries.end() )
   {
+    QgsMSDebugMsg( "Layer not found in cache" )
     return 0;
   }
   else
@@ -92,6 +93,7 @@ QgsMapLayer* QgsMSLayerCache::searchLayer( const QString& url, const QString& la
       vl->removeOverlay( "diagram" );
     }
 #endif //DIAGRAMSERVER
+    QgsMSDebugMsg( "Layer found in cache" )
     return it->layerPointer;
   }
 }