Fix retrieving setting values with "extruderValues()" and "resolveOrValue()"

CURA-4358

Using the context for override the extruderValues() and resolveOrValue()
functions, for getting the correct values. Also indicate in the context
to skip the first container in the stacks (user container)

cura/Settings/ExtruderManager.py

@@ -588,6 +588,46 @@ class ExtruderManager(QObject):
 
         return result
 
+    ##  Get all extruder values for a certain setting. This function will skip the user settings container.
+    #
+    #   This is exposed to SettingFunction so it can be used in value functions.
+    #
+    #   \param key The key of the setting to retrieve values for.
+    #
+    #   \return A list of values for all extruders. If an extruder does not have a value, it will not be in the list.
+    #           If no extruder has the value, the list will contain the global value.
+    @staticmethod
+    def getDefaultExtruderValues(key):
+        global_stack = Application.getInstance().getGlobalContainerStack()
+        context = PropertyEvaluationContext(global_stack)
+        context.context["evaluate_from_container_index"] = 1  # skip the user settings container
+        context.context["override_operators"] = {
+            "extruderValue": ExtruderManager.getDefaultExtruderValue,
+            "extruderValues": ExtruderManager.getDefaultExtruderValues,
+            "resolveOrValue": ExtruderManager.getDefaultResolveOrValue
+        }
+
+        result = []
+        for extruder in ExtruderManager.getInstance().getMachineExtruders(global_stack.getId()):
+            # only include values from extruders that are "active" for the current machine instance
+            if int(extruder.getMetaDataEntry("position")) >= global_stack.getProperty("machine_extruder_count", "value", context = context):
+                continue
+
+            value = extruder.getRawProperty(key, "value", context = context)
+
+            if value is None:
+                continue
+
+            if isinstance(value, SettingFunction):
+                value = value(extruder, context = context)
+
+            result.append(value)
+
+        if not result:
+            result.append(global_stack.getProperty(key, "value", context = context))
+
+        return result
+
     ##  Get all extruder values for a certain setting.
     #
     #   This is exposed to qml for display purposes
@@ -622,11 +662,24 @@ class ExtruderManager(QObject):
         return value
 
     ##  Get the default value from the given extruder. This function will skip the user settings container.
+    #
+    #   This is exposed to SettingFunction to use in value functions.
+    #
+    #   \param extruder_index The index of the extruder to get the value from.
+    #   \param key The key of the setting to get the value of.
+    #
+    #   \return The value of the setting for the specified extruder or for the
+    #   global stack if not found.
     @staticmethod
     def getDefaultExtruderValue(extruder_index, key):
         extruder = ExtruderManager.getInstance().getExtruderStack(extruder_index)
-        context = PropertyEvaluationContext()
+        context = PropertyEvaluationContext(extruder)
         context.context["evaluate_from_container_index"] = 1  # skip the user settings container
+        context.context["override_operators"] = {
+            "extruderValue": ExtruderManager.getDefaultExtruderValue,
+            "extruderValues": ExtruderManager.getDefaultExtruderValues,
+            "resolveOrValue": ExtruderManager.getDefaultResolveOrValue
+        }
 
         if extruder:
             value = extruder.getRawProperty(key, "value", context = context)
@@ -650,3 +703,25 @@ class ExtruderManager(QObject):
         resolved_value = global_stack.getProperty(key, "value")
 
         return resolved_value
+
+    ##  Get the resolve value or value for a given key without looking the first container (user container)
+    #
+    #   This is the effective value for a given key, it is used for values in the global stack.
+    #   This is exposed to SettingFunction to use in value functions.
+    #   \param key The key of the setting to get the value of.
+    #
+    #   \return The effective value
+    @staticmethod
+    def getDefaultResolveOrValue(key):
+        global_stack = Application.getInstance().getGlobalContainerStack()
+        context = PropertyEvaluationContext(global_stack)
+        context.context["evaluate_from_container_index"] = 1  # skip the user settings container
+        context.context["override_operators"] = {
+            "extruderValue": ExtruderManager.getDefaultExtruderValue,
+            "extruderValues": ExtruderManager.getDefaultExtruderValues,
+            "resolveOrValue": ExtruderManager.getDefaultResolveOrValue
+        }
+
+        resolved_value = global_stack.getProperty(key, "value", context = context)
+
+        return resolved_value

cura/Settings/GlobalStack.py

@@ -96,18 +96,18 @@ class GlobalStack(CuraContainerStack):
         if not self.definition.findDefinitions(key = key):
             return None
 
+        if context is None:
+            context = PropertyEvaluationContext()
+        context.pushContainer(self)
+
         # Handle the "resolve" property.
-        if self._shouldResolve(key, property_name):
+        if self._shouldResolve(key, property_name, context):
             self._resolving_settings.add(key)
             resolve = super().getProperty(key, "resolve", context)
             self._resolving_settings.remove(key)
             if resolve is not None:
                 return resolve
 
-        if context is None:
-            context = PropertyEvaluationContext()
-        context.pushContainer(self)
-
         # Handle the "limit_to_extruder" property.
         limit_to_extruder = super().getProperty(key, "limit_to_extruder", context)
         if limit_to_extruder is not None:
@@ -151,7 +151,7 @@ class GlobalStack(CuraContainerStack):
 
     # Determine whether or not we should try to get the "resolve" property instead of the
     # requested property.
-    def _shouldResolve(self, key: str, property_name: str) -> bool:
+    def _shouldResolve(self, key: str, property_name: str, context: Optional[PropertyEvaluationContext] = None) -> bool:
         if property_name is not "value":
             # Do not try to resolve anything but the "value" property
             return False
@@ -163,7 +163,7 @@ class GlobalStack(CuraContainerStack):
             # track all settings that are being resolved.
             return False
 
-        setting_state = super().getProperty(key, "state")
+        setting_state = super().getProperty(key, "state", context = context)
         if setting_state is not None and setting_state != InstanceState.Default:
             # When the user has explicitly set a value, we should ignore any resolve and
             # just return that value.

cura/Settings/UserChangesModel.py

@@ -70,8 +70,11 @@ class UserChangesModel(ListModel):
             # Override "getExtruderValue" with "getDefaultExtruderValue" so we can get the default values
             user_changes = containers.pop(0)
             default_value_resolve_context = PropertyEvaluationContext(stack)
+            default_value_resolve_context.context["evaluate_from_container_index"] = 1  # skip the user settings container
             default_value_resolve_context.context["override_operators"] = {
-                "extruderValue": ExtruderManager.getDefaultExtruderValue
+                "extruderValue": ExtruderManager.getDefaultExtruderValue,
+                "extruderValues": ExtruderManager.getDefaultExtruderValues,
+                "resolveOrValue": ExtruderManager.getDefaultResolveOrValue
             }
 
             for setting_key in user_changes.getAllKeys():