[needs-docs] Rename "Define layer projection" to "Define Shapefile pr…

…ojection"

This algorithm ONLY works on shapefile inputs, so make that clear in the algorithm's
display name and helper strings

python/plugins/processing/algs/help/qgis.yaml

@@ -66,9 +66,9 @@ qgis:createpointslayerfromtable: >
   This algorithm creates points layer from a table with columns that contain coordinates fields. Besides X and Y coordinates you can also specify Z and M fields.
 
 qgis:definecurrentprojection: >
-  This algorithm sets an existing layer's projection to the provided CRS. Contrary to the "Assign projection" algorithm, it will not output a new layer.
+  This algorithm sets an existing Shapefile's projection to the provided CRS. Contrary to the "Assign projection" algorithm, it will not output a new layer.
 
-  For shapefile datasets, the .prj and .qpj files will be overwritten - or created if missing - to match the provided CRS.
+  The .prj and .qpj files associated with the Shapefile will be overwritten - or created if missing - to match the provided CRS.
 
 qgis:delaunaytriangulation: >
   This algorithm creates a polygon layer with the delaunay triangulation corresponding to a points layer.

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

@@ -2,7 +2,7 @@
 
 """
 ***************************************************************************
-    SpatialIndex.py
+    DefineProjection.py
     ---------------------
     Date                 : January 2016
     Copyright            : (C) 2016 by Alexander Bruy
@@ -53,7 +53,7 @@ def __init__(self):
 
     def initAlgorithm(self, config=None):
         self.addParameter(QgsProcessingParameterVectorLayer(self.INPUT,
-                                                            self.tr('Input Layer'), types=[QgsProcessing.TypeVectorAnyGeometry]))
+                                                            self.tr('Input Shapefile'), types=[QgsProcessing.TypeVectorAnyGeometry]))
         self.addParameter(QgsProcessingParameterCrs(self.CRS, 'CRS'))
         self.addOutput(QgsProcessingOutputVectorLayer(self.INPUT,
                                                       self.tr('Layer with projection')))
@@ -62,7 +62,13 @@ def name(self):
         return 'definecurrentprojection'
 
     def displayName(self):
-        return self.tr('Define layer projection')
+        return self.tr('Define Shapefile projection')
+
+    def tags(self):
+        return self.tr('layer,shp,prj,qpj,change,alter').split(',')
+
+    def shortDescription(self):
+        return self.tr('Changes a Shapefile\'s projection to a new CRS without reprojecting features')
 
     def flags(self):
         return super().flags() | QgsProcessingAlgorithm.FlagNoThreading
@@ -91,7 +97,7 @@ def processAlgorithm(self, parameters, context, feedback):
                 else:
                     os.remove(qpjFile)
         else:
-            feedback.pushConsoleInfo(self.tr("Data source isn't a shapefile, skipping .prj/.qpj creation"))
+            feedback.pushConsoleInfo(self.tr("Data source isn't a Shapefile, skipping .prj/.qpj creation"))
 
         layer.setCrs(crs)
         layer.triggerRepaint()