Move more modelling code to c++

Author: nyalldawson

python/core/processing/qgsprocessingmodelalgorithm.sip

@@ -785,6 +785,19 @@ Copies are protected to avoid slicing
  Sets the model's help ``contents`` (a free-form map of values describing the algorithm's
  use and metadata).
 .. seealso:: helpContent()
+%End
+
+    QString sourceFilePath() const;
+%Docstring
+ Returns the source file path for the model, if available.
+.. seealso:: setSourceFilePath()
+ :rtype: str
+%End
+
+    void setSourceFilePath( const QString &path );
+%Docstring
+ Sets the source file ``path`` for the model, if available.
+.. seealso:: sourceFilePath()
 %End
 
   protected:

python/plugins/processing/modeler/ModelerAlgorithm.py

@@ -179,8 +179,6 @@ class ModelerAlgorithm(QgsProcessingModelAlgorithm):
     def __init__(self):
         super().__init__()
 
-        self.descriptionFile = None
-
         # Geoalgorithms in this model. A dict of Algorithm objects, with names as keys
         self.algs = {}
 
@@ -229,7 +227,7 @@ def resolveValue(self, value, param):
         return param.evaluateForModeler(v, self)
 
     def asPythonCommand(self, parameters, context):
-        if self.descriptionFile:
+        if self.sourceFilePath():
             return QgsProcessingAlgorithm.asPythonCommand(self, parameters, context)
         else:
             return None

python/plugins/processing/modeler/ModelerAlgorithmProvider.py

@@ -108,7 +108,7 @@ def loadFromFolder(self, folder):
                         alg = ModelerAlgorithm()
                         if alg.fromFile(fullpath):
                             if alg.name():
-                                alg.descriptionFile = fullpath
+                                alg.setSourceFilePath(fullpath)
                                 self.algs.append(alg)
                         else:
                             QgsMessageLog.logMessage(self.tr('Could not load model {0}', 'ModelerAlgorithmProvider').format(descriptionFile),

python/plugins/processing/modeler/ModelerDialog.py

@@ -439,8 +439,8 @@ def saveModel(self, saveAs):
             return
         self.model.setName(str(self.textName.text()))
         self.model.setGroup(str(self.textGroup.text()))
-        if self.model.descriptionFile is not None and not saveAs:
-            filename = self.model.descriptionFile
+        if self.model.sourceFilePath() is not None and not saveAs:
+            filename = self.model.sourceFilePath()
         else:
             filename, filter = QFileDialog.getSaveFileName(self,
                                                            self.tr('Save Model'),
@@ -449,7 +449,7 @@ def saveModel(self, saveAs):
             if filename:
                 if not filename.endswith('.model3'):
                     filename += '.model3'
-                self.model.descriptionFile = filename
+                self.model.setSourceFilePath(filename)
         if filename:
             if not self.model.toFile(filename):
                 if saveAs:

src/core/processing/qgsprocessingmodelalgorithm.cpp

@@ -481,6 +481,16 @@ QVariantMap QgsProcessingModelAlgorithm::processAlgorithm( const QVariantMap &pa
   return finalResults;
 }
 
+QString QgsProcessingModelAlgorithm::sourceFilePath() const
+{
+  return mSourceFile;
+}
+
+void QgsProcessingModelAlgorithm::setSourceFilePath( const QString &sourceFile )
+{
+  mSourceFile = sourceFile;
+}
+
 QVariantMap QgsProcessingModelAlgorithm::helpContent() const
 {
   return mHelpContent;

src/core/processing/qgsprocessingmodelalgorithm.h

@@ -780,6 +780,18 @@ class CORE_EXPORT QgsProcessingModelAlgorithm : public QgsProcessingAlgorithm
      */
     void setHelpContent( const QVariantMap &contents );
 
+    /**
+     * Returns the source file path for the model, if available.
+     * \see setSourceFilePath()
+     */
+    QString sourceFilePath() const;
+
+    /**
+     * Sets the source file \a path for the model, if available.
+     * \see sourceFilePath()
+     */
+    void setSourceFilePath( const QString &path );
+
   protected:
 
     QVariantMap processAlgorithm( const QVariantMap &parameters,
@@ -797,6 +809,9 @@ class CORE_EXPORT QgsProcessingModelAlgorithm : public QgsProcessingAlgorithm
 
     QVariantMap mHelpContent;
 
+    //! Model source file
+    QString mSourceFile;
+
     void dependsOnChildAlgorithmsRecursive( const QString &childId, QSet<QString> &depends ) const;
     void dependentChildAlgorithmsRecursive( const QString &childId, QSet<QString> &depends ) const;