[processing] Use real map settings scope instead of custom canvasextent variables

nyalldawson · nyalldawson · commit 377cba0b74c0 · 2016-11-22T11:17:38.000+10:00
diff --git a/python/plugins/processing/core/parameters.py b/python/plugins/processing/core/parameters.py
@@ -71,6 +71,10 @@ def _expressionContext():
     context = QgsExpressionContext()
     context.appendScope(QgsExpressionContextUtils.globalScope())
     context.appendScope(QgsExpressionContextUtils.projectScope())
+
+    if iface.mapCanvas():
+        context.appendScope(QgsExpressionContextUtils.mapSettingsScope(iface.mapCanvas().mapSettings()))
+
     processingScope = QgsExpressionContextScope()
     layers = dataobjects.getAllLayers()
     for layer in layers:
@@ -93,12 +97,6 @@ def _expressionContext():
             processingScope.setVariable('%s_band%i_min' % (name, i + 1), stats.minimumValue)
             processingScope.setVariable('%s_band%i_max' % (name, i + 1), stats.maximumValue)
 
-    extent = iface.mapCanvas().extent()
-    processingScope.setVariable('canvasextent_minx', extent.xMinimum())
-    processingScope.setVariable('canvasextent_miny', extent.yMinimum())
-    processingScope.setVariable('canvasextent_maxx', extent.xMaximum())
-    processingScope.setVariable('canvasextent_maxy', extent.yMaximum())
-
     extent = iface.mapCanvas().fullExtent()
     processingScope.setVariable('fullextent_minx', extent.xMinimum())
     processingScope.setVariable('fullextent_miny', extent.yMinimum())
