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LayerCommands.cpp
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//
// Copyright 2017 Animal Logic
//
// 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.
//
#include "AL/maya/CommandGuiHelper.h"
#include "AL/usdmaya/StageCache.h"
#include "AL/usdmaya/Utils.h"
#include "AL/usdmaya/cmds/LayerCommands.h"
#include "AL/usdmaya/nodes/Layer.h"
#include "AL/usdmaya/nodes/LayerVisitor.h"
#include "AL/usdmaya/nodes/ProxyShape.h"
#include "maya/MArgDatabase.h"
#include "maya/MDagPath.h"
#include "maya/MFnDagNode.h"
#include "maya/MGlobal.h"
#include "maya/MItDependencyGraph.h"
#include "maya/MItDependencyNodes.h"
#include "maya/MSelectionList.h"
#include "maya/MStringArray.h"
#include "maya/MSyntax.h"
#include "pxr/usd/usd/stageCacheContext.h"
#include "pxr/usd/usdUtils/stageCache.h"
#include "pxr/usd/sdf/listOp.h"
#include <sstream>
// printf debugging
#if 0 || AL_ENABLE_TRACE
# define Trace(X) std::cerr << X << std::endl;
#else
# define Trace(X)
#endif
namespace AL {
namespace usdmaya {
namespace cmds {
//----------------------------------------------------------------------------------------------------------------------
MSyntax LayerCommandBase::setUpCommonSyntax()
{
MSyntax syntax;
syntax.useSelectionAsDefault(true);
syntax.setObjectType(MSyntax::kSelectionList, 0, 1);
syntax.addFlag("-p", "-proxy", MSyntax::kString);
return syntax;
}
//----------------------------------------------------------------------------------------------------------------------
MArgDatabase LayerCommandBase::makeDatabase(const MArgList& args)
{
MStatus status;
MArgDatabase database(syntax(), args, &status);
if(!status)
throw status;
return database;
}
//----------------------------------------------------------------------------------------------------------------------
nodes::ProxyShape* LayerCommandBase::getShapeNode(const MArgDatabase& args)
{
MDagPath path;
MSelectionList sl;
args.getObjects(sl);
for(uint32_t i = 0; i < sl.length(); ++i)
{
MStatus status = sl.getDagPath(i, path);
if(path.node().hasFn(MFn::kTransform))
{
path.extendToShape();
}
if(path.node().hasFn(MFn::kPluginShape))
{
MFnDagNode fn(path);
if(fn.typeId() == nodes::ProxyShape::kTypeId)
{
return (nodes::ProxyShape*)fn.userNode();
}
}
}
sl.clear();
{
if(args.isFlagSet("-p"))
{
MString proxyName;
if(args.getFlagArgument("-p", 0, proxyName))
{
sl.add(proxyName);
if(sl.length())
{
MStatus status = sl.getDagPath(0, path);
if(path.node().hasFn(MFn::kTransform))
{
path.extendToShape();
}
if(path.node().hasFn(MFn::kPluginShape))
{
MFnDagNode fn(path);
if(fn.typeId() == nodes::ProxyShape::kTypeId)
{
return (nodes::ProxyShape*)fn.userNode();
}
}
}
}
MGlobal::displayError("Invalid ProxyShape specified/selected with -p flag");
}
else
MGlobal::displayError("No ProxyShape specified/selected");
}
throw MS::kFailure;
return 0;
}
//----------------------------------------------------------------------------------------------------------------------
MObject LayerCommandBase::getSelectedNode(const MArgDatabase& args, const MTypeId typeId)
{
MSelectionList sl;
args.getObjects(sl);
MFnDependencyNode fn;
MObject obj;
for(uint32_t i = 0; i < sl.length(); ++i)
{
sl.getDependNode(i, obj);
fn.setObject(obj);
if(fn.typeId() == typeId)
return obj;
}
return MObject::kNullObj;
}
//----------------------------------------------------------------------------------------------------------------------
UsdStageRefPtr LayerCommandBase::getShapeNodeStage(const MArgDatabase& args)
{
nodes::ProxyShape* node = getShapeNode(args);
return node ? node->getUsdStage() : UsdStageRefPtr();
}
//----------------------------------------------------------------------------------------------------------------------
// LayerGetLayers
//----------------------------------------------------------------------------------------------------------------------
AL_MAYA_DEFINE_COMMAND(LayerGetLayers, AL_usdmaya);
//----------------------------------------------------------------------------------------------------------------------
MSyntax LayerGetLayers::createSyntax()
{
MSyntax syn = setUpCommonSyntax();
syn.addFlag("-h", "-help", MSyntax::kNoArg);
syn.addFlag("-u", "-used", MSyntax::kNoArg);
syn.addFlag("-m", "-muted", MSyntax::kNoArg);
syn.addFlag("-s", "-stack", MSyntax::kNoArg);
syn.addFlag("-sl", "-sessionLayer", MSyntax::kNoArg);
syn.addFlag("-rl", "-rootLayer", MSyntax::kNoArg);
syn.addFlag("-mn", "-mayaNames", MSyntax::kNoArg);
syn.addFlag("-hi", "-hierarchy", MSyntax::kNoArg);
return syn;
}
//----------------------------------------------------------------------------------------------------------------------
bool LayerGetLayers::isUndoable() const
{
return false;
}
//----------------------------------------------------------------------------------------------------------------------
MStatus LayerGetLayers::doIt(const MArgList& argList)
{
try
{
MArgDatabase args = makeDatabase(argList);
AL_MAYA_COMMAND_HELP(args, g_helpText);
nodes::ProxyShape* proxyShape = getShapeNode(args);
UsdStageRefPtr stage = proxyShape->getUsdStage();
MStringArray results;
auto push = [](MStringArray& results, const MString& newLayer)
{
for(uint32_t i = 0; i < results.length(); ++i)
{
if(results[i] == newLayer) return;
}
results.append(newLayer);
};
const bool useMayaNames = args.isFlagSet("-mn");
if(args.isFlagSet("-rl"))
{
SdfLayerHandle rootLayer = stage->GetRootLayer();
if(useMayaNames)
{
setResult(proxyShape->findLayerMayaName(rootLayer));
}
else
{
setResult(convert(rootLayer->GetDisplayName()));
}
return MS::kSuccess;
}
else
if(args.isFlagSet("-m"))
{
if(useMayaNames)
{
MGlobal::displayError("Cannot query many names on muted layers (they layers haven't been imported into Maya)");
return MS::kFailure;
}
const std::vector<std::string>& layers = stage->GetMutedLayers();
for(auto it = layers.begin(); it != layers.end(); ++it)
{
results.append(convert(*it));
}
}
else
if(args.isFlagSet("-s"))
{
const bool includeSessionLayer = args.isFlagSet("-sl");
SdfLayerHandleVector layerStack = stage->GetLayerStack(includeSessionLayer);
for(auto it = layerStack.begin(); it != layerStack.end(); ++it)
{
if(useMayaNames)
{
results.append(proxyShape->findLayerMayaName(*it));
}
else
{
results.append(convert((*it)->GetDisplayName()));
}
}
}
else
if(args.isFlagSet("-u"))
{
const bool includeSessionLayer = args.isFlagSet("-sl");
SdfLayerHandle sessionLayer = stage->GetSessionLayer();
SdfLayerHandleVector layerStack = stage->GetUsedLayers();
for(auto it = layerStack.begin(); it != layerStack.end(); ++it)
{
if(!includeSessionLayer)
{
if(sessionLayer == *it)
continue;
}
if(useMayaNames)
{
results.append(proxyShape->findLayerMayaName(*it));
}
else
{
results.append(convert((*it)->GetDisplayName()));
}
}
}
else
if(args.isFlagSet("-sl"))
{
SdfLayerHandle sessionLayer = stage->GetSessionLayer();
if(useMayaNames)
{
setResult(proxyShape->findLayerMayaName(sessionLayer));
}
else
{
setResult(convert(sessionLayer->GetDisplayName()));
}
return MS::kSuccess;
}
else
if(args.isFlagSet("-hi"))
{
class HierarchyBuilder : public nodes::LayerVisitor
{
public:
HierarchyBuilder(nodes::ProxyShape* shape, bool mayaNames)
: nodes::LayerVisitor(shape), m_mayaNames(mayaNames) {}
void onVisit()
{
nodes::Layer* layer = thisLayer();
MString item;
for(uint32_t i = 1; i < depth(); ++i)
{
item += " ";
}
if(m_mayaNames)
{
MFnDependencyNode fn(layer->thisMObject());
item += fn.name();
}
else
{
LAYER_HANDLE_CHECK(layer->getHandle());
item += convert(layer->getHandle()->GetDisplayName());
}
result.append(item);
}
MStringArray result;
bool m_mayaNames;
};
HierarchyBuilder builder(proxyShape, useMayaNames);
builder.visitAll();
setResult(builder.result);
return MS::kSuccess;
}
setResult(results);
}
catch(const MStatus& status)
{
return status;
}
return MS::kSuccess;
}
//----------------------------------------------------------------------------------------------------------------------
// LayerCreateLayer
//----------------------------------------------------------------------------------------------------------------------
AL_MAYA_DEFINE_COMMAND(LayerCreateLayer, AL_usdmaya);
MSyntax LayerCreateLayer::createSyntax()
{
MSyntax syn = setUpCommonSyntax();
syn.addFlag("-o", "-open", MSyntax::kString);
syn.addFlag("-pa", "-parent", MSyntax::kString);
syn.addFlag("-h", "-help", MSyntax::kNoArg);
return syn;
}
//----------------------------------------------------------------------------------------------------------------------
bool LayerCreateLayer::isUndoable() const
{
return true;
}
//----------------------------------------------------------------------------------------------------------------------
MStatus LayerCreateLayer::doIt(const MArgList& argList)
{
Trace("LayerCreateLayer::doIt");
try
{
MArgDatabase args = makeDatabase(argList);
AL_MAYA_COMMAND_HELP(args, g_helpText);
if(args.isFlagSet("-o"))
{
// extract remaining args
args.getFlagArgument("-o", 0, m_filePath);
}
if(args.isFlagSet("-pa"))
{
// extract remaining args
args.getFlagArgument("-pa", 0, m_parentLayerName);
}
// Determine the Parent node
MObject layer = getSelectedNode(args, nodes::Layer::kTypeId);
m_shape = getShapeNode(args);
if(!m_shape)
{
throw MS::kFailure;
}
if(m_parentLayerName.length() > 0)
{
UsdStageRefPtr stage = m_shape->getUsdStage();
if(!stage)
{
MGlobal::displayError("no valid stage found on the proxy shape");
throw MS::kFailure;
}
m_rootLayer = SdfLayer::Find(convert(m_parentLayerName));
if(!m_rootLayer)
{
std::stringstream ss("LayerCreateLayer:", std::ios_base::app | std::ios_base::out);
ss << "Unable to find the parent layer within USD, with identifier '" << m_parentLayerName << "'" << std::endl;
MGlobal::displayError(ss.str().c_str());
throw MS::kFailure;
}
m_parentLayer = m_shape->findLayer(m_rootLayer);
if(!m_parentLayer)
{
std::stringstream ss("LayerCreateLayer:", std::ios_base::app | std::ios_base::out);
ss << "Unable to find the parent layer within Maya, with identifier '" << m_parentLayerName << "'" << std::endl;
MGlobal::displayError(ss.str().c_str());
throw MS::kFailure;
}
}
else
if(layer == MObject::kNullObj)
{
UsdStageRefPtr stage = m_shape->getUsdStage();
if(!stage)
{
MGlobal::displayError("no valid stage found on the proxy shape");
throw MS::kFailure;
}
m_rootLayer = stage->GetRootLayer();
m_parentLayer = m_shape->findLayer(m_rootLayer);
if(!m_parentLayer)
{
MGlobal::displayError("LayerCreateLayer:Catastrophic failure when trying to retrieve the RootLayer");
throw MS::kFailure;
}
}
else
{
MFnDependencyNode fn(layer);
m_parentLayer = (nodes::Layer*)fn.userNode();
m_rootLayer = m_parentLayer->getHandle();
}
}
catch(const MStatus& status)
{
return status;
}
if(!m_shape)
{
MGlobal::displayError(MString("LayerCreateLayer: Invalid shape during Layer creation"));
return MS::kFailure;
}
return redoIt();
}
//----------------------------------------------------------------------------------------------------------------------
MStatus LayerCreateLayer::undoIt()
{
Trace("LayerCreateLayer::undoIt");
// first let's go remove the newly created layer handle from the root layer we added it to
LAYER_HANDLE_CHECK(m_newLayer->getHandle());
SdfLayerHandle handle = m_newLayer->getHandle();
// delete the Layer node
MDGModifier mod;
mod.deleteNode(m_layerNode);
mod.doIt();
// lots more to do here!
return MS::kSuccess;
}
//----------------------------------------------------------------------------------------------------------------------
MStatus LayerCreateLayer::redoIt()
{
Trace("LayerCreateLayer::redoIt");
UsdStageRefPtr childStage;
SdfLayerRefPtr handle = SdfLayer::FindOrOpen(convert(m_filePath));
if(!handle)
{
MGlobal::displayError(MString("LayerCreateLayer:unable to open layer \"") + m_filePath + "\"");
return MS::kFailure;
}
MSelectionList sl;
MString mayaLayerNodeName = AL::usdmaya::nodes::Layer::toMayaNodeName(handle->GetDisplayName());
MStatus status = sl.add(mayaLayerNodeName);
uint32_t selectionLength = sl.length(&status);
MObject selectedLayer = MObject::kNullObj;
if(selectionLength)
{
sl.getDependNode(0, selectedLayer);
if(selectedLayer.apiType() == MFn::kPluginDependNode)
{
sl.getDependNode(0, selectedLayer);
MGlobal::displayInfo("LayerCreateLayer: There exists a maya layer for this node already. Not creating a new layer.");
return MS::kSuccess;
}
}
// construct the new layer node
MFnDependencyNode fn;
m_layerNode = fn.create(nodes::Layer::kTypeId);
fn.setName(nodes::Layer::toMayaNodeName(handle->GetDisplayName()));
m_newLayer = (nodes::Layer*)fn.userNode();
m_newLayer->init(m_shape, handle);
m_parentLayer->addChildLayer(m_newLayer);
std::stringstream ss("LayerCreateLayer:", std::ios_base::app | std::ios_base::out);
MGlobal::displayInfo(ss.str().c_str());
return MS::kSuccess;
}
//----------------------------------------------------------------------------------------------------------------------
// LayerCreateSubLayer
//----------------------------------------------------------------------------------------------------------------------
AL_MAYA_DEFINE_COMMAND(LayerCreateSubLayer, AL_usdmaya);
//----------------------------------------------------------------------------------------------------------------------
MSyntax LayerCreateSubLayer::createSyntax()
{
MSyntax syn = setUpCommonSyntax();
syn.addFlag("-o", "-open", MSyntax::kString);
syn.addFlag("-c", "-create", MSyntax::kString);
syn.addFlag("-h", "-help", MSyntax::kNoArg);
return syn;
}
//----------------------------------------------------------------------------------------------------------------------
bool LayerCreateSubLayer::isUndoable() const
{
return true;
}
//----------------------------------------------------------------------------------------------------------------------
MStatus LayerCreateSubLayer::doIt(const MArgList& argList)
{
Trace("LayerCreateSubLayer::doIt");
try
{
MArgDatabase args = makeDatabase(argList);
AL_MAYA_COMMAND_HELP(args, g_helpText);
if(args.isFlagSet("-c"))
{
// extract remaining args
args.getFlagArgument("-c", 0, m_filePath);
m_isOpening = false;
}
else
if(args.isFlagSet("-o"))
{
// extract remaining args
args.getFlagArgument("-o", 0, m_filePath);
m_isOpening = true;
}
MObject layer = getSelectedNode(args, nodes::Layer::kTypeId);
if(layer == MObject::kNullObj)
{
nodes::ProxyShape* proxyNode = getShapeNode(args);
UsdStageRefPtr stage = proxyNode->getUsdStage();
if(!stage)
{
MGlobal::displayError("no valid stage found on the proxy shape");
throw MS::kFailure;
}
m_rootLayer = stage->GetEditTarget().GetLayer();
m_parentLayer = proxyNode->findLayer(m_rootLayer);
if(!m_parentLayer)
{
MGlobal::displayError("Catastrophic failure when trying to retrieve the edit target");
throw MS::kFailure;
}
}
else
{
MFnDependencyNode fn(layer);
m_parentLayer = (nodes::Layer*)fn.userNode();
m_rootLayer = m_parentLayer->getHandle();
}
}
catch(const MStatus& status)
{
return status;
}
return redoIt();
}
//----------------------------------------------------------------------------------------------------------------------
MStatus LayerCreateSubLayer::undoIt()
{
Trace("LayerCreateSubLayer::undoIt");
m_parentLayer->removeSubLayer(m_newLayer);
// first let's go remove the newly created layer handle from the root layer we added it to
LAYER_HANDLE_CHECK(m_newLayer->getHandle());
SdfLayerHandle handle = m_newLayer->getHandle();
SdfSubLayerProxy proxy = m_rootLayer->GetSubLayerPaths();
// remove the layer, and save the original layer to reflect the changes.
proxy.Remove(handle->GetIdentifier());
m_rootLayer->Save();
// delete the Layer node
MDGModifier mod;
mod.deleteNode(m_layerNode);
mod.doIt();
// lots more to do here!
return MS::kSuccess;
}
//----------------------------------------------------------------------------------------------------------------------
MStatus LayerCreateSubLayer::redoIt()
{
Trace("LayerCreateSubLayer::redoIt");
UsdStageRefPtr childStage;
SdfLayerHandle handle;
if(!m_isOpening)
{
childStage = UsdStage::CreateNew(convert(m_filePath));
if(!childStage)
{
handle = childStage->GetRootLayer();
if(!handle)
{
return MS::kFailure;
}
else
{
handle->Save();
}
}
}
else
{
handle = SdfLayer::FindOrOpen(convert(m_filePath));
if(!handle)
{
MGlobal::displayError(MString("unable to open layer \"") + m_filePath + "\"");
return MS::kFailure;
}
}
// construct the new layer node
MFnDependencyNode fn;
m_layerNode = fn.create(nodes::Layer::kTypeId);
m_newLayer = (nodes::Layer*)fn.userNode();
m_rootLayer->GetSubLayerPaths().push_back(handle->GetIdentifier());
m_rootLayer->Save();
m_newLayer->init(m_shape, handle);
m_parentLayer->addSubLayer(m_newLayer);
fn.setName(nodes::Layer::toMayaNodeName(handle->GetDisplayName()));
return MS::kSuccess;
}
//----------------------------------------------------------------------------------------------------------------------
// LayerCurrentEditTarget
//----------------------------------------------------------------------------------------------------------------------
AL_MAYA_DEFINE_COMMAND(LayerCurrentEditTarget, AL_usdmaya);
//----------------------------------------------------------------------------------------------------------------------
MSyntax LayerCurrentEditTarget::createSyntax()
{
MSyntax syn = setUpCommonSyntax();
syn.enableQuery(true);
syn.addFlag("-l", "-layer", MSyntax::kString);
syn.addFlag("-sp", "-sourcePath", MSyntax::kString);
syn.addFlag("-tp", "-targetPath", MSyntax::kString);
syn.addFlag("-h", "-help", MSyntax::kNoArg);
syn.addFlag("-fdn", "-findByDisplayName", MSyntax::kNoArg);
syn.addFlag("-fid", "-findByIdentifier", MSyntax::kNoArg);
return syn;
}
//----------------------------------------------------------------------------------------------------------------------
bool LayerCurrentEditTarget::isUndoable() const
{
return true;
}
//----------------------------------------------------------------------------------------------------------------------
PcpNodeRef LayerCurrentEditTarget::determineEditTargetMapping(UsdStageRefPtr stage,
const MArgDatabase& args,
SdfLayerHandle editTargetLayer) const
{
if(editTargetLayer.IsInvalid())
{
return PcpNodeRef();
}
if(args.isFlagSet("-sp") && args.isFlagSet("-tp"))
{
MString targetPath;
MString sourcePath;
args.getFlagArgument("-tp", 0, targetPath);
args.getFlagArgument("-sp", 0, sourcePath);
UsdPrim parentPrim = stage->GetPrimAtPath(SdfPath(targetPath.asChar()));
if( ! parentPrim.IsValid() )
{
std::stringstream ss("LayerCurrentEditTarget:", std::ios_base::app | std::ios_base::out);
ss << "Couldn't find the parent prim at path '" << targetPath.asChar() << "'" << std::endl;
MGlobal::displayWarning(ss.str().c_str());
return PcpNodeRef();
}
SdfReferenceListOp referenceListOp;
if(parentPrim.GetMetadata<SdfReferenceListOp>(TfToken("references"), &referenceListOp))
{
// TODO: I doubt this is the correct way to get current references. The API for UsdPrim.GetReferences() isn't sufficient!
// TODO: Spiff recommends getting the references a different way,
// TODO: as mentioned here https://groups.google.com/forum/#!topic/usd-interest/o6jK0tVw2eU
const SdfListOp<SdfReference>::ItemVector& addedItems = referenceListOp.GetAddedItems();
size_t referenceListSize = addedItems.size();
for(size_t i = 0; i < referenceListSize; ++i)
{
SdfLayerHandle referencedLayer = SdfLayer::Find(addedItems[i].GetAssetPath());
// Is the referenced layer referring to the layer we selected?
if(referencedLayer == editTargetLayer)
{
PcpNodeRef::child_const_range childRange = parentPrim.GetPrimIndex().GetRootNode().GetChildrenRange();
PcpNodeRef::child_const_iterator currentChildSpec = childRange.first;
PcpNodeRef::child_const_iterator end = childRange.second;
while(currentChildSpec != end)
{
if(currentChildSpec->GetParentNode().GetPath() == SdfPath(targetPath.asChar())
&& currentChildSpec->GetPath() == SdfPath(sourcePath.asChar()))
{
return *currentChildSpec;
}
++currentChildSpec;
}
}
}
MGlobal::displayWarning("LayerCurrentEditTarget: Couldn't find the PcpNodeRef to initialise the MappingFunction for the EditTarget");
}
}
else
{
MGlobal::displayInfo("LayerCurrentEditTarget: Default MappingFunction for EditTarget will be used since sp(Source Prim) and tp(Target Prim) flags were not set");
}
return PcpNodeRef();
}
//----------------------------------------------------------------------------------------------------------------------
MStatus LayerCurrentEditTarget::doIt(const MArgList& argList)
{
try
{
MArgDatabase args = makeDatabase(argList);
AL_MAYA_COMMAND_HELP(args, g_helpText);
if(args.isQuery())
{
isQuery = true;
stage = getShapeNodeStage(args);
if(stage)
{
const UsdEditTarget& editTarget = stage->GetEditTarget();
previous = editTarget;
}
else
{
MGlobal::displayError("LayerCurrentEditTarget: no loaded stage found on proxy node");
return MS::kFailure;
}
}
else
{
// Setup the function pointers which will be used to find the wanted layer
if(args.isFlagSet("-fid"))
{
// Use the Identifier when looking for the correct layer. Used for anonymous layers
getLayerId = [](SdfLayerHandle layer) { return layer->GetIdentifier(); };
}
else if(args.isFlagSet("-fdn"))
{
// Use the DisplayName when looking for the correct layer
getLayerId = [](SdfLayerHandle layer) { return layer->GetDisplayName(); };
}
else
{
// Default to DisplayName if not specified for backwards compatibility
getLayerId = [](SdfLayerHandle layer) { return layer->GetDisplayName(); };
}
isQuery = false;
MObject selectedLayer = MObject::kNullObj;
// if the layer has been manually specified
MString layerName;
if(args.isFlagSet("-l") && args.getFlagArgument("-l", 0, layerName))
{
MString mayaLayerName = AL::usdmaya::nodes::Layer::toMayaNodeName(convert(layerName));
MSelectionList sl;
MStatus status = sl.add(mayaLayerName);
uint32_t selectionLength = sl.length(&status);
if(selectionLength)
{
sl.getDependNode(0, selectedLayer);
if(selectedLayer.apiType() == MFn::kPluginDependNode)
{
MFnDependencyNode fnDep(selectedLayer);
if(fnDep.typeId() != nodes::Layer::kTypeId)
{
selectedLayer = MObject::kNullObj;
}
}
else
{
selectedLayer = MObject::kNullObj;
}
}
}
if(selectedLayer == MObject::kNullObj)
{
selectedLayer = getSelectedNode(args, nodes::Layer::kTypeId);
}
SdfLayerHandle foundLayer = nullptr;
// check to see if a layer is selected.
if(selectedLayer != MObject::kNullObj)
{
MFnDependencyNode fnLayer(selectedLayer);
m_usdLayer = (nodes::Layer*)fnLayer.userNode();
LAYER_HANDLE_CHECK(m_usdLayer->getHandle());
foundLayer = m_usdLayer->getHandle();
previouslyAnEditTarget = m_usdLayer->hasBeenTheEditTarget();
MObject proxyNode = MObject::kNullObj;
MObject temp = selectedLayer;
while(proxyNode == MObject::kNullObj)
{
MPlug parentLayerPlug(temp, nodes::Layer::parentLayer());
MPlug parentShapePlug(temp, nodes::Layer::proxyShape());
// yay! we've found the proxy shape
if(parentShapePlug.isConnected())
{
MPlugArray plugs;
parentShapePlug.connectedTo(plugs, true, true);
if(plugs.length())
{
proxyNode = plugs[0].node();
}
break;
}
if(parentLayerPlug.isConnected())
{
MPlugArray plugs;
parentLayerPlug.connectedTo(plugs, true, true);
if(plugs.length())
{
temp = plugs[0].node();
}
else
{
MGlobal::displayError("upstream proxy shape could not be found");
return MS::kFailure;
}
}
}
if(proxyNode == MObject::kNullObj)
{
MGlobal::displayError("upstream proxy shape could not be found");
return MS::kFailure;
}
MFnDependencyNode fnDep(proxyNode);
if(proxyNode.hasFn(MFn::kPluginShape))
{
if(fnDep.typeId() == nodes::ProxyShape::kTypeId)
{
nodes::ProxyShape* usdProxy = (nodes::ProxyShape*)fnDep.userNode();
stage = usdProxy->getUsdStage();
}
}
}
else
{
stage = getShapeNodeStage(args);
}
if(stage)
{
previous = stage->GetEditTarget();
isQuery = false;
std::string layerName2;
if(foundLayer)
{
PcpNodeRef mappingNode = determineEditTargetMapping(stage, args, foundLayer);
if(mappingNode)
{
next = UsdEditTarget(foundLayer, mappingNode);
}
else
{
next = UsdEditTarget(foundLayer);
}
layerName2 = getLayerId(next.GetLayer());
}
else
if(args.isFlagSet("-l"))
{
MString layerName;
args.getFlagArgument("-l", 0, layerName);
layerName2 = convert(layerName);
SdfLayerHandleVector layers = stage->GetUsedLayers();
for(auto it = layers.begin(); it != layers.end(); ++it)
{
SdfLayerHandle handle = *it;
if(layerName2 == getLayerId(handle))
{
PcpNodeRef mappingNode = determineEditTargetMapping(stage, args, handle);
if(mappingNode)
{
next = UsdEditTarget(handle, mappingNode);
}
else
{
next = UsdEditTarget(handle);
}
break;
}
}
}
else
{
MGlobal::displayError("No layer specified");
return MS::kFailure;
}
if(!next.IsValid())
{
// if we failed to find the layer in the list of used layers, just check to see whether we are actually able to
// edit said layer.
SdfLayerHandleVector layers = stage->GetUsedLayers();
for(auto it = layers.begin(); it != layers.end(); ++it)
{
SdfLayerHandle handle = *it;
if(layerName2 == getLayerId(handle))
{
MGlobal::displayError("LayerCurrentEditTarget: Unable to set the edit target, the specified layer cannot be edited");
return MS::kFailure;
}
}
MGlobal::displayError(MString("LayerCurrentEditTarget: no layer found on proxy node that matches the name \"") + convert(layerName2) + "\"");
return MS::kFailure;
}
}
else
{
MGlobal::displayError("LayerCurrentEditTarget: no loaded stage found on proxy node");
return MS::kFailure;
}
}
}
catch(const MStatus& status)
{
MGlobal::displayError("LayerCurrentEditTarget: no proxy node found");
return status;
}
return redoIt();
}
//----------------------------------------------------------------------------------------------------------------------
MStatus LayerCurrentEditTarget::redoIt()
{
if(!isQuery)
{
Trace("setting target: " << next.GetLayer()->GetDisplayName());
stage->SetEditTarget(next);
if(m_usdLayer)
{
m_usdLayer->setHasBeenTheEditTarget(true);
}
}
else
{
// there are cases now where the layer may not have a name, so we need to hunt for the layer.