[Feature][QGIS-Server] Specifying url for QgsComposerHtml in GetPRint Request

The idea is to add the capability to specify an URL to a QgsComposerHtml
element in the GetPrint request.
This will give the ability to get PDF with content base on a web
service.

Author: rldhont

src/mapserver/qgsconfigparser.cpp

@@ -20,6 +20,8 @@
 #include "qgsapplication.h"
 #include "qgscomposerlabel.h"
 #include "qgscomposermap.h"
+#include "qgscomposerhtml.h"
+#include "qgscomposerframe.h"
 #include "qgscomposition.h"
 #include "qgsrasterlayer.h"
 #include "qgsvectorlayer.h"
@@ -407,8 +409,9 @@ QgsComposition* QgsConfigParser::createPrintComposition( const QString& composer
 {
   QList<QgsComposerMap*> composerMaps;
   QList<QgsComposerLabel*> composerLabels;
+  QList<const QgsComposerHtml*> composerHtmls;
 
-  QgsComposition* c = initComposition( composerTemplate, mapRenderer, composerMaps, composerLabels );
+  QgsComposition* c = initComposition( composerTemplate, mapRenderer, composerMaps, composerLabels, composerHtmls );
   if ( !c )
   {
     return 0;
@@ -545,13 +548,35 @@ QgsComposition* QgsConfigParser::createPrintComposition( const QString& composer
     }
 
     currentLabel->setText( title );
-    /* the method adjustSizeToText has some rendering issue
-     * for HTML or Simple String
-    if ( !currentLabel->htmlState() )
+  }
+
+  //replace html url
+  foreach (const QgsComposerHtml *currentHtml, composerHtmls )
+  {
+    QgsComposerHtml * html = const_cast<QgsComposerHtml *>(currentHtml);
+    QgsComposerFrame *htmlFrame = html->frame( 0 );
+    QString htmlId = htmlFrame->id();
+    QString url = parameterMap.value( htmlId.toUpper() );
+
+    if ( url.isEmpty() )
     {
-      currentLabel->adjustSizeToText();
+      //remove exported Htmls referenced in the request
+      //but with empty string
+      if ( parameterMap.contains( htmlId.toUpper() ) )
+      {
+        c->removeMultiFrame( html );
+        delete currentHtml;
+      }
+      else
+      {
+        html->update();
+      }
+      continue;
     }
-    */
+
+    QUrl newUrl( url );
+    html->setUrl( newUrl );
+    html->update();
   }
 
   return c;

src/mapserver/qgsconfigparser.h

@@ -29,6 +29,9 @@
 class QgsComposition;
 class QgsComposerLabel;
 class QgsComposerMap;
+class QgsComposerFrame;
+class QgsComposerMultiFrame;
+class QgsComposerHtml;
 class QDomElement;
 
 /**Interface class for configuration parsing, e.g. SLD configuration or QGIS project file*/
@@ -117,7 +120,7 @@ class QgsConfigParser
     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;
+    virtual QgsComposition* initComposition( const QString& composerTemplate, QgsMapRenderer* mapRenderer, QList< QgsComposerMap*>& mapList, QList< QgsComposerLabel* >& labelList, QList<const QgsComposerHtml *>& htmlFrameList ) const = 0;
 
     /**Adds print capabilities to xml document. ParentElem usually is the <Capabilities> element*/
     virtual void printCapabilities( QDomElement& parentElement, QDomDocument& doc ) const = 0;

src/mapserver/qgsprojectparser.cpp

@@ -32,6 +32,7 @@
 #include "qgscomposerlabel.h"
 #include "qgscomposerlegend.h"
 #include "qgscomposermap.h"
+#include "qgscomposerhtml.h"
 #include "qgscomposerpicture.h"
 #include "qgscomposerscalebar.h"
 #include "qgscomposershape.h"
@@ -2187,7 +2188,7 @@ QString QgsProjectParser::layerIdFromLegendLayer( const QDomElement& legendLayer
   return legendLayerFileList.at( 0 ).toElement().attribute( "layerid" );
 }
 
-QgsComposition* QgsProjectParser::initComposition( const QString& composerTemplate, QgsMapRenderer* mapRenderer, QList< QgsComposerMap*>& mapList, QList< QgsComposerLabel* >& labelList ) const
+QgsComposition* QgsProjectParser::initComposition( const QString& composerTemplate, QgsMapRenderer* mapRenderer, QList< QgsComposerMap*>& mapList, QList< QgsComposerLabel* >& labelList, QList<const QgsComposerHtml *>& htmlList ) const
 {
   //Create composition from xml
   QDomElement composerElem = composerByName( composerTemplate );
@@ -2210,15 +2211,40 @@ QgsComposition* QgsProjectParser::initComposition( const QString& composerTempla
   }
 
   composition->addItemsFromXML( compositionElem, *mXMLDoc );
-  composition->composerItems( mapList );
-  composition->composerItems( labelList );
 
-  QList< QgsComposerPicture* > pictureList;
-  composition->composerItems( pictureList );
-  QList< QgsComposerPicture* >::iterator picIt = pictureList.begin();
-  for ( ; picIt != pictureList.end(); ++picIt )
+  labelList.clear();
+  mapList.clear();
+  htmlList.clear();
+
+  QList<QgsComposerItem* > itemList;
+  composition->composerItems( itemList );
+  QList<QgsComposerItem *>::iterator itemIt = itemList.begin();
+  for ( ; itemIt != itemList.end(); ++itemIt )
   {
-    ( *picIt )->setPictureFile( convertToAbsolutePath(( *picIt )->pictureFile() ) );
+    QgsComposerLabel* label = dynamic_cast< QgsComposerLabel *>( *itemIt );
+    if ( label )
+    {
+      labelList.push_back( label );
+      continue;
+    }
+    QgsComposerMap* map = dynamic_cast< QgsComposerMap *>( *itemIt );
+    if ( map )
+    {
+      mapList.push_back( map );
+      continue;
+    }
+    QgsComposerPicture* pic = dynamic_cast< QgsComposerPicture *>( *itemIt );
+    if ( pic )
+    {
+      pic->setPictureFile( convertToAbsolutePath(( pic )->pictureFile() ) );
+      continue;
+    }
+    const QgsComposerHtml* html = composition->getComposerHtmlByItem( *itemIt );
+    if ( html )
+    {
+      htmlList.push_back( html );
+      continue;
+    }
   }
 
   return composition;
@@ -2294,6 +2320,21 @@ void QgsProjectParser::printCapabilities( QDomElement& parentElement, QDomDocume
       composerTemplateElem.appendChild( composerLabelElem );
     }
 
+    //add available composer HTML
+    QDomNodeList composerHtmlList = currentComposerElem.elementsByTagName( "ComposerHtml" );
+    for ( int j = 0; j < composerHtmlList.size(); ++j )
+    {
+      QDomElement citem = composerHtmlList.at( j ).firstChildElement( "ComposerFrame" ).firstChildElement( "ComposerItem" );
+      QString id = citem.attribute( "id" );
+      if ( id.isEmpty() ) //only export labels with ids for text replacement
+      {
+        continue;
+      }
+      QDomElement composerHtmlElem = doc.createElement( "ComposerHtml" );
+      composerHtmlElem.setAttribute( "name", id );
+      composerTemplateElem.appendChild( composerHtmlElem );
+    }
+
     composerTemplatesElem.appendChild( composerTemplateElem );
   }
   parentElement.appendChild( composerTemplatesElem );

src/mapserver/qgsprojectparser.h

@@ -105,7 +105,7 @@ class QgsProjectParser: public QgsConfigParser
     const QDomDocument* xmlDoc() const { return mXMLDoc; }
 
     /**Creates a composition from the project file (probably delegated to the fallback parser)*/
-    QgsComposition* initComposition( const QString& composerTemplate, QgsMapRenderer* mapRenderer, QList< QgsComposerMap*>& mapList, QList< QgsComposerLabel* >& labelList ) const;
+    QgsComposition* initComposition( const QString& composerTemplate, QgsMapRenderer* mapRenderer, QList< QgsComposerMap*>& mapList, QList< QgsComposerLabel* >& labelList, QList<const QgsComposerHtml *>& htmlList ) const;
 
     /**Adds print capabilities to xml document. ParentElem usually is the <Capabilities> element*/
     void printCapabilities( QDomElement& parentElement, QDomDocument& doc ) const;

src/mapserver/qgssldparser.cpp

@@ -1544,11 +1544,11 @@ void QgsSLDParser::setCrsForLayer( const QDomElement& layerElem, QgsMapLayer* ml
   }
 }
 
-QgsComposition* QgsSLDParser::initComposition( const QString& composerTemplate, QgsMapRenderer* mapRenderer, QList< QgsComposerMap*>& mapList, QList< QgsComposerLabel* >& labelList ) const
+QgsComposition* QgsSLDParser::initComposition( const QString& composerTemplate, QgsMapRenderer* mapRenderer, QList< QgsComposerMap*>& mapList, QList< QgsComposerLabel* >& labelList, QList<const QgsComposerHtml *>& htmlList ) const
 {
   if ( mFallbackParser )
   {
-    return mFallbackParser->initComposition( composerTemplate, mapRenderer, mapList, labelList );
+    return mFallbackParser->initComposition( composerTemplate, mapRenderer, mapList, labelList, htmlList );
   }
   return 0;
 }

src/mapserver/qgssldparser.h

@@ -79,7 +79,7 @@ class QgsSLDParser: public QgsConfigParser
     virtual void setParameterMap( const QMap<QString, QString>& parameterMap ) { mParameterMap = parameterMap; }
 
     /**Creates a composition from the project file (delegated to the fallback parser)*/
-    QgsComposition* initComposition( const QString& composerTemplate, QgsMapRenderer* mapRenderer, QList< QgsComposerMap*>& mapList, QList< QgsComposerLabel* >& labelList ) const;
+    QgsComposition* initComposition( const QString& composerTemplate, QgsMapRenderer* mapRenderer, QList< QgsComposerMap*>& mapList, QList< QgsComposerLabel* >& labelList, QList<const QgsComposerHtml *>& htmlList ) const;
 
     /**Adds print capabilities to xml document. Delegated to fallback parser*/
     void printCapabilities( QDomElement& parentElement, QDomDocument& doc ) const;