Restore Set style for vector layer alg

Author: nyalldawson

python/plugins/processing/algs/qgis/QGISAlgorithmProvider.py

@@ -128,6 +128,7 @@
 from .ServiceAreaFromLayer import ServiceAreaFromLayer
 from .ServiceAreaFromPoint import ServiceAreaFromPoint
 from .SetMValue import SetMValue
+from .SetVectorStyle import SetVectorStyle
 from .SetZValue import SetZValue
 from .ShortestPathLayerToPoint import ShortestPathLayerToPoint
 from .ShortestPathPointToLayer import ShortestPathPointToLayer
@@ -161,7 +162,6 @@
 # from .GeometryConvert import GeometryConvert
 # from .FieldsCalculator import FieldsCalculator
 # from .FieldPyculator import FieldsPyculator
-# from .SetVectorStyle import SetVectorStyle
 # from .SetRasterStyle import SetRasterStyle
 # from .SelectByAttributeSum import SelectByAttributeSum
 # from .Datasources2Vrt import Datasources2Vrt
@@ -192,7 +192,7 @@ def getAlgs(self):
         #         SpatialJoin(),
         #         GeometryConvert(), FieldsCalculator(),
         #         FieldsPyculator(),
-        #         SetVectorStyle(), SetRasterStyle(),
+        #         SetRasterStyle(),
         #         FieldsMapper(), SelectByAttributeSum(), Datasources2Vrt(),
         #         DefineProjection(),
         #         RectanglesOvalsDiamondsVariable(),
@@ -289,6 +289,7 @@ def getAlgs(self):
                 ServiceAreaFromLayer(),
                 ServiceAreaFromPoint(),
                 SetMValue(),
+                SetVectorStyle(),
                 SetZValue(),
                 ShortestPathLayerToPoint(),
                 ShortestPathPointToLayer(),

python/plugins/processing/algs/qgis/SetVectorStyle.py

@@ -25,14 +25,10 @@
 
 __revision__ = '$Format:%H$'
 
-import os
-from qgis.core import (QgsApplication,
-                       QgsProcessingUtils)
+from qgis.core import (QgsProcessingParameterFile,
+                       QgsProcessingParameterVectorLayer,
+                       QgsProcessingOutputVectorLayer)
 from processing.algs.qgis.QgisAlgorithm import QgisAlgorithm
-from processing.core.parameters import ParameterVector
-from processing.core.outputs import OutputVector
-from processing.core.parameters import ParameterFile
-from processing.tools import dataobjects
 
 
 class SetVectorStyle(QgisAlgorithm):
@@ -48,11 +44,12 @@ def __init__(self):
         super().__init__()
 
     def initAlgorithm(self, config=None):
-        self.addParameter(ParameterVector(self.INPUT,
-                                          self.tr('Vector layer')))
-        self.addParameter(ParameterFile(self.STYLE,
-                                        self.tr('Style file'), False, False, 'qml'))
-        self.addOutput(OutputVector(self.OUTPUT, self.tr('Styled'), True))
+        self.addParameter(QgsProcessingParameterVectorLayer(self.INPUT,
+                                                            self.tr('Vector layer')))
+        self.addParameter(QgsProcessingParameterFile(self.STYLE,
+                                                     self.tr('Style file'), extension='qml'))
+        self.addOutput(QgsProcessingOutputVectorLayer(self.INPUT,
+                                                      self.tr('Styled')))
 
     def name(self):
         return 'setstyleforvectorlayer'
@@ -61,13 +58,8 @@ def displayName(self):
         return self.tr('Set style for vector layer')
 
     def processAlgorithm(self, parameters, context, feedback):
-        filename = self.getParameterValue(self.INPUT)
-
-        style = self.getParameterValue(self.STYLE)
-        layer = QgsProcessingUtils.mapLayerFromString(filename, context, False)
-        if layer is None:
-            dataobjects.load(filename, os.path.basename(filename), style=style)
-        else:
-            layer.loadNamedStyle(style)
-            context.addLayerToLoadOnCompletion(layer.id())
-            layer.triggerRepaint()
+        layer = self.parameterAsVectorLayer(parameters, self.INPUT, context)
+        style = self.parameterAsFile(parameters, self.STYLE, context)
+        layer.loadNamedStyle(style)
+        layer.triggerRepaint()
+        return {self.INPUT: layer}