[processing] introduce OutputCrs output and add algorithms to get layer CRS in modeler

Author: alexbruy

python/plugins/processing/core/outputs.py

@@ -115,6 +115,15 @@ def setValue(self, value):
             return False
 
 
+class OutputCrs(Output):
+
+    def __init__(self, name='', description=''):
+        self.name = name
+        self.description = description
+        self.value = None
+        self.hidden = True
+
+
 class OutputFile(Output):
 
     def __init__(self, name='', description='', ext=None):

python/plugins/processing/modeler/ModelerOnlyAlgorithmProvider.py

@@ -31,6 +31,8 @@
 from processing.modeler.CalculatorModelerAlgorithm import CalculatorModelerAlgorithm
 from processing.modeler.RasterLayerBoundsAlgorithm import RasterLayerBoundsAlgorithm
 from processing.modeler.VectorLayerBoundsAlgorithm import VectorLayerBoundsAlgorithm
+from processing.modeler.RasterLayerCrsAlgorithm import RasterLayerCrsAlgorithm
+from processing.modeler.VectorLayerCrsAlgorithm import VectorLayerCrsAlgorithm
 
 pluginPath = os.path.split(os.path.dirname(__file__))[0]
 
@@ -52,6 +54,8 @@ def getIcon(self):
     def _loadAlgorithms(self):
         self.algs = [CalculatorModelerAlgorithm(),
                      RasterLayerBoundsAlgorithm(),
-                     VectorLayerBoundsAlgorithm()]
+                     VectorLayerBoundsAlgorithm(),
+                     RasterLayerCrsAlgorithm(),
+                     VectorLayerCrsAlgorithm()]
         for alg in self.algs:
             alg.provider = self

python/plugins/processing/modeler/ModelerParametersDialog.py

@@ -69,7 +69,8 @@
                                      OutputDirectory,
                                      OutputNumber,
                                      OutputString,
-                                     OutputExtent)
+                                     OutputExtent,
+                                     OutputCrs)
 
 from processing.modeler.ModelerAlgorithm import (ValueFromInput,
                                                  ValueFromOutput,
@@ -384,7 +385,7 @@ def getWidgetFromParameter(self, param):
             item.setEditText(unicode(param.default))
         elif isinstance(param, ParameterCrs):
             item = QComboBox()
-            values = self.getAvailableValuesOfType(ParameterCrs)
+            values = self.getAvailableValuesOfType(ParameterCrs, OutputCrs)
             for v in values:
                 item.addItem(self.resolveValueDescription(v), v)
         elif isinstance(param, ParameterExtent):

python/plugins/processing/modeler/RasterLayerBoundsAlgorithm.py

@@ -28,8 +28,8 @@
 from processing.core.GeoAlgorithm import GeoAlgorithm
 from processing.core.parameters import ParameterRaster
 from processing.core.outputs import OutputNumber
-from processing.tools import dataobjects
 from processing.core.outputs import OutputExtent
+from processing.tools import dataobjects
 
 
 class RasterLayerBoundsAlgorithm(GeoAlgorithm):

python/plugins/processing/modeler/RasterLayerCrsAlgorithm.py

@@ -0,0 +1,51 @@
+# -*- coding: utf-8 -*-
+
+"""
+***************************************************************************
+    RasterLayerCrsAlgorithm.py
+    ---------------------
+    Date                 : August 2016
+    Copyright            : (C) 2016 by Alexander Bruy
+    Email                : alexander dot bruy at gmail dot com
+***************************************************************************
+*                                                                         *
+*   This program is free software; you can redistribute it and/or modify  *
+*   it under the terms of the GNU General Public License as published by  *
+*   the Free Software Foundation; either version 2 of the License, or     *
+*   (at your option) any later version.                                   *
+*                                                                         *
+***************************************************************************
+"""
+
+__author__ = 'Alexander Bruy'
+__date__ = 'August 2016'
+__copyright__ = '(C) 2016, Alexander Bruy'
+
+# This will get replaced with a git SHA1 when you do a git archive
+
+__revision__ = '$Format:%H$'
+
+from processing.core.GeoAlgorithm import GeoAlgorithm
+from processing.core.parameters import ParameterRaster
+from processing.core.outputs import OutputCrs
+from processing.tools import dataobjects
+
+
+class RasterLayerCrsAlgorithm(GeoAlgorithm):
+
+    LAYER = 'LAYER'
+    CRS = 'CRS'
+
+    def defineCharacteristics(self):
+        self.showInModeler = True
+        self.showInToolbox = False
+
+        self.name = self.tr('Raster layer CRS', 'RasterLayerCrsAlgorithm')
+        self.group = self.tr('Modeler-only tools', 'RasterLayerCrsAlgorithm')
+
+        self.addParameter(ParameterRaster(self.LAYER, self.tr('Layer', 'RasterLayerCrsAlgorithm')))
+        self.addOutput(OutputCrs(self.CRS, self.tr('CRS', 'RasterLayerCrsAlgorithm')))
+
+    def processAlgorithm(self, progress):
+        layer = dataobjects.getObjectFromUri(self.getParameterValue(self.LAYER))
+        self.setOutputValue(self.CRS, layer.crs().authid())

python/plugins/processing/modeler/VectorLayerCrsAlgorithm.py

@@ -0,0 +1,51 @@
+# -*- coding: utf-8 -*-
+
+"""
+***************************************************************************
+    VectorLayerCrsAlgorithm.py
+    ---------------------
+    Date                 : August 2016
+    Copyright            : (C) 2016 by Alexander Bruy
+    Email                : alexander dot bruy at gmail dot com
+***************************************************************************
+*                                                                         *
+*   This program is free software; you can redistribute it and/or modify  *
+*   it under the terms of the GNU General Public License as published by  *
+*   the Free Software Foundation; either version 2 of the License, or     *
+*   (at your option) any later version.                                   *
+*                                                                         *
+***************************************************************************
+"""
+
+__author__ = 'Alexander Bruy'
+__date__ = 'August 2016'
+__copyright__ = '(C) 2016, Alexander Bruy'
+
+# This will get replaced with a git SHA1 when you do a git archive
+
+__revision__ = '$Format:%H$'
+
+from processing.core.GeoAlgorithm import GeoAlgorithm
+from processing.core.parameters import ParameterVector
+from processing.core.outputs import OutputCrs
+from processing.tools import dataobjects
+
+
+class VectorLayerCrsAlgorithm(GeoAlgorithm):
+
+    LAYER = 'LAYER'
+    CRS = 'CRS'
+
+    def defineCharacteristics(self):
+        self.showInModeler = True
+        self.showInToolbox = False
+
+        self.name = self.tr('Vector layer CRS', 'VectorLayerCrsAlgorithm')
+        self.group = self.tr('Modeler-only tools', 'VectorLayerCrsAlgorithm')
+
+        self.addParameter(ParameterVector(self.LAYER, self.tr('Layer', 'VectorLayerCrsAlgorithm'), ))
+        self.addOutput(OutputCrs(self.CRS, self.tr('CRS', 'VectorLayerCrsAlgorithm')))
+
+    def processAlgorithm(self, progress):
+        layer = dataobjects.getObjectFromUri(self.getParameterValue(self.LAYER))
+        self.setOutputValue(self.CRS, layer.crs().authid())