MAYA-110727 - Crash when editing Layer That has Permission to Edit false (locked)

lib/mayaUsd/ufe/UsdTransform3dHandler.cpp

@@ -16,6 +16,7 @@
 #include "UsdTransform3dHandler.h"
 
 #include <mayaUsd/ufe/UsdSceneItem.h>
+#include <mayaUsd/ufe/Utils.h>
 
 #include <maya/MGlobal.h>
 
@@ -72,6 +73,12 @@ Ufe::Transform3d::Ptr UsdTransform3dHandler::transform3d(const Ufe::SceneItem::P
         return nullptr;
     }
 
+    std::string errMsg;
+    if (!MayaUsd::ufe::isEditTargetLayerModifiable(usdItem->prim().GetStage(), &errMsg)) {
+        MGlobal::displayError(errMsg.c_str());
+        return nullptr;
+    }
+
     return UsdTransform3d::create(usdItem);
 }
 

lib/mayaUsd/ufe/UsdTransform3dMayaXformStack.cpp

@@ -909,13 +909,10 @@ Ufe::Transform3d::Ptr UsdTransform3dMayaXformStackHandler::editTransform3d(
         return nullptr;
     }
 
-    auto stage = usdItem->prim().GetStage();
-    if (stage) {
-        const SdfLayerHandle& editLayer = stage->GetEditTarget().GetLayer();
-        if (editLayer && stage->IsLayerMuted(editLayer->GetIdentifier())) {
-            MGlobal::displayError("Editing a muted layer is not allowed.");
-            return nullptr;
-        }
+    std::string errMsg;
+    if (!MayaUsd::ufe::isEditTargetLayerModifiable(usdItem->prim().GetStage(), &errMsg)) {
+        MGlobal::displayError(errMsg.c_str());
+        return nullptr;
     }
 
     return createTransform3d(

lib/mayaUsd/ufe/UsdUndoAddNewPrimCommand.cpp

@@ -80,10 +80,15 @@ void UsdUndoAddNewPrimCommand::execute()
     UsdUndoBlock undoBlock(&_undoableItem);
 
     if (_stage) {
-        MayaUsd::ufe::InAddOrDeleteOperation ad;
-        auto                                 prim = _stage->DefinePrim(_primPath, _primToken);
-        if (!prim.IsValid())
-            TF_RUNTIME_ERROR("Failed to create new prim type: %s", _primToken.GetText());
+        std::string errMsg;
+        if (!MayaUsd::ufe::isEditTargetLayerModifiable(_stage, &errMsg)) {
+            TF_RUNTIME_ERROR("%s", errMsg.c_str());
+        } else {
+            MayaUsd::ufe::InAddOrDeleteOperation ad;
+            auto                                 prim = _stage->DefinePrim(_primPath, _primToken);
+            if (!prim.IsValid())
+                TF_RUNTIME_ERROR("Failed to create new prim type: %s", _primToken.GetText());
+        }
     }
 }
 

lib/mayaUsd/ufe/Utils.cpp

@@ -382,6 +382,10 @@ bool isAttributeEditAllowed(const PXR_NS::UsdAttribute& attr, std::string* errMs
     const auto& stage = prim.GetStage();
     const auto& editTarget = stage->GetEditTarget();
 
+    if (!isEditTargetLayerModifiable(stage, errMsg)) {
+        return false;
+    }
+
     // get the index to edit target layer
     const auto targetLayerIndex = findLayerIndex(prim, editTarget.GetLayer());
 
@@ -443,6 +447,38 @@ bool isAttributeEditAllowed(const UsdPrim& prim, const TfToken& attrName)
     return true;
 }
 
+bool isEditTargetLayerModifiable(const PXR_NS::UsdStageWeakPtr stage, std::string* errMsg)
+{
+    const auto editTarget = stage->GetEditTarget();
+    const auto editLayer = editTarget.GetLayer();
+
+    if (editLayer && !editLayer->PermissionToEdit()) {
+        if (errMsg) {
+            std::string err = TfStringPrintf(
+                "Cannot edit [%s] because it is read-only. Set PermissionToEdit = true to proceed.",
+                editLayer->GetDisplayName().c_str());
+
+            *errMsg = err;
+        }
+
+        return false;
+    }
+
+    if (stage->IsLayerMuted(editLayer->GetIdentifier())) {
+        if (errMsg) {
+            std::string err = TfStringPrintf(
+                "Cannot edit [%s] because it is muted. Unmute [%s] to proceed.",
+                editLayer->GetDisplayName().c_str(),
+                editLayer->GetDisplayName().c_str());
+            *errMsg = err;
+        }
+
+        return false;
+    }
+
+    return true;
+}
+
 Ufe::Selection removeDescendants(const Ufe::Selection& src, const Ufe::Path& filterPath)
 {
     // Filter the src selection, removing items below the filterPath

lib/mayaUsd/ufe/Utils.h

@@ -132,6 +132,13 @@ bool isAttributeEditAllowed(const PXR_NS::UsdAttribute& attr, std::string* errMs
 MAYAUSD_CORE_PUBLIC
 bool isAttributeEditAllowed(const PXR_NS::UsdPrim& prim, const PXR_NS::TfToken& attrName);
 
+//! Check if the edit target in the stage is allowed to be changed.
+//! \return True, if the edit target layer in the stage is allowed to be changed
+MAYAUSD_CORE_PUBLIC
+bool isEditTargetLayerModifiable(
+    const PXR_NS::UsdStageWeakPtr stage,
+    std::string*                  errMsg = nullptr);
+
 //! Send notification for data model changes
 template <class T>
 void sendNotification(const Ufe::SceneItem::Ptr& item, const Ufe::Path& previousPath)

lib/mayaUsd/ufe/wrapUtils.cpp

@@ -199,6 +199,11 @@ bool isAttributeEditAllowed(const PXR_NS::UsdAttribute& attr)
     return ufe::isAttributeEditAllowed(attr);
 }
 
+bool isEditTargetLayerModifiable(const PXR_NS::UsdStageWeakPtr stage)
+{
+    return ufe::isEditTargetLayerModifiable(stage);
+}
+
 PXR_NS::TfTokenVector getProxyShapePurposes(const std::string& ufePathString)
 {
     auto path =
@@ -236,4 +241,5 @@ void wrapUtils()
     def("ufePathToInstanceIndex", ufePathToInstanceIndex);
     def("getProxyShapePurposes", getProxyShapePurposes);
     def("isAttributeEditAllowed", isAttributeEditAllowed);
+    def("isEditTargetLayerModifiable", isEditTargetLayerModifiable);
 }

test/lib/ufe/CMakeLists.txt

@@ -10,6 +10,7 @@ set(TEST_SCRIPT_FILES
     testSelection.py
     testUfePythonImport.py
     testAttributeBlock.py
+    testBlockedLayerEdit.py
 )
 
 set(TEST_SUPPORT_FILES

test/lib/ufe/testBlockedLayerEdit.py

@@ -0,0 +1,163 @@
+#!/usr/bin/env python
+
+#
+# Copyright 2021 Autodesk
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+import fixturesUtils
+import mayaUtils
+import usdUtils
+
+from pxr import Sdf
+
+from maya import cmds
+from maya import standalone
+
+import mayaUsd
+from mayaUsd import ufe as mayaUsdUfe
+
+import ufe
+import unittest
+
+class BlockedLayerEditTestCase(unittest.TestCase):
+
+    pluginsLoaded = False
+
+    @classmethod
+    def setUpClass(cls):
+        fixturesUtils.readOnlySetUpClass(__file__, loadPlugin=False)
+
+        if not cls.pluginsLoaded:
+            cls.pluginsLoaded = mayaUtils.isMayaUsdPluginLoaded()
+
+    @classmethod
+    def tearDownClass(cls):
+        standalone.uninitialize()
+
+    def setUp(self):
+        ''' Called initially to set up the Maya test environment '''
+        # Load plugins
+        self.assertTrue(self.pluginsLoaded)
+
+        # Clear selection to start off
+        cmds.select(clear=True)
+
+    def testTranslateMutedLayer(self):
+        # create new stage
+        cmds.file(new=True, force=True)
+
+        # Open usdCylinder.ma scene in testSamples
+        mayaUtils.openCylinderScene()
+
+        # get the stage
+        proxyShapes = cmds.ls(type="mayaUsdProxyShapeBase", long=True)
+        proxyShapePath = proxyShapes[0]
+        stage = mayaUsd.lib.GetPrim(proxyShapePath).GetStage()
+
+        # cylinder prim
+        cylinderPrim = stage.GetPrimAtPath('/pCylinder1')
+        self.assertIsNotNone(cylinderPrim)
+
+        # create a sub-layer.
+        rootLayer = stage.GetRootLayer()
+        subLayerA = cmds.mayaUsdLayerEditor(rootLayer.identifier, edit=True, addAnonymous="LayerA")[0]
+
+        # check to see the if the sublayers was added
+        addedLayers = [subLayerA]
+        self.assertEqual(rootLayer.subLayerPaths, addedLayers)
+
+        # set the edit target to LayerA.
+        cmds.mayaUsdEditTarget(proxyShapePath, edit=True, editTarget=subLayerA)
+
+        # mute the layer
+        stage.MuteLayer(subLayerA)
+
+        # Check that our helper function is returning the right thing
+        self.assertFalse(mayaUsdUfe.isEditTargetLayerModifiable(stage))
+
+        # Get translate attribute and make sure its empty
+        translateAttr = cylinderPrim.GetAttribute('xformOp:translate')
+        self.assertIsNotNone(translateAttr)
+
+        tranlateBeforeEdit = translateAttr.Get()
+
+        # create a transform3d and translate
+        cylinderPath = ufe.Path([
+                     mayaUtils.createUfePathSegment("|mayaUsdTransform|shape"), 
+                     usdUtils.createUfePathSegment("/pCylinder1")])
+        cylinderItem = ufe.Hierarchy.createItem(cylinderPath)
+
+        cylinderT3d = ufe.Transform3d.transform3d(cylinderItem)
+        cylinderT3d.translate(5.0, 6.0, 7.0)
+
+        # check that the translate operation didn't change anything
+        tranlateAfterEdit = translateAttr.Get()
+        self.assertEqual(tranlateBeforeEdit, tranlateAfterEdit)
+
+    def testTranslateLockedLayer(self):
+        # create new stage
+        cmds.file(new=True, force=True)
+
+        # Open usdCylinder.ma scene in testSamples
+        mayaUtils.openCylinderScene()
+
+        # get the stage
+        proxyShapes = cmds.ls(type="mayaUsdProxyShapeBase", long=True)
+        proxyShapePath = proxyShapes[0]
+        stage = mayaUsd.lib.GetPrim(proxyShapePath).GetStage()
+
+        # cylinder prim
+        cylinderPrim = stage.GetPrimAtPath('/pCylinder1')
+        self.assertIsNotNone(cylinderPrim)
+
+        # create a sub-layer.
+        rootLayer = stage.GetRootLayer()
+        subLayerA = cmds.mayaUsdLayerEditor(rootLayer.identifier, edit=True, addAnonymous="LayerA")[0]
+
+        # check to see the if the sublayers was added
+        addedLayers = [subLayerA]
+        self.assertEqual(rootLayer.subLayerPaths, addedLayers)
+
+        # set the edit target to LayerA.
+        cmds.mayaUsdEditTarget(proxyShapePath, edit=True, editTarget=subLayerA)
+
+        # set permission to edit to false
+        layerA = Sdf.Find(subLayerA)
+        layerA.SetPermissionToEdit(False)
+
+        # Check that our helper function is returning the right thing
+        self.assertFalse(mayaUsdUfe.isEditTargetLayerModifiable(stage))
+
+        # Get translate attribute and make sure its empty
+        translateAttr = cylinderPrim.GetAttribute('xformOp:translate')
+        self.assertIsNotNone(translateAttr)
+
+        tranlateBeforeEdit = translateAttr.Get()
+
+        # create a transform3d and translate
+        cylinderPath = ufe.Path([
+                     mayaUtils.createUfePathSegment("|mayaUsdTransform|shape"), 
+                     usdUtils.createUfePathSegment("/pCylinder1")])
+        cylinderItem = ufe.Hierarchy.createItem(cylinderPath)
+
+        cylinderT3d = ufe.Transform3d.transform3d(cylinderItem)
+        cylinderT3d.translate(5.0, 6.0, 7.0)
+
+        # check that the translate operation didn't change anything
+        tranlateAfterEdit = translateAttr.Get()
+        self.assertEqual(tranlateBeforeEdit, tranlateAfterEdit)
+
+if __name__ == '__main__':
+    unittest.main(verbosity=2)