Optimize nodes deletion [skip ci]

If all nodes belong to a part are selected to remove, then the part got
removed, remove part is more light weight than remove nodes and edges

src/document.cpp

@@ -3209,6 +3209,7 @@ void Document::paste()
         Snapshot snapshot;
         loadSkeletonFromXmlStream(&snapshot, xmlStreamReader);
         addFromSnapshot(snapshot, SnapshotSource::Paste);
+        saveSnapshot();
     }
 }
 

src/documentwindow.cpp

@@ -994,6 +994,7 @@ DocumentWindow::DocumentWindow() :
     connect(graphicsWidget, &SkeletonGraphicsWidget::setNodeBoneMark, m_document, &Document::setNodeBoneMark);
     connect(graphicsWidget, &SkeletonGraphicsWidget::clearNodeCutFaceSettings, m_document, &Document::clearNodeCutFaceSettings);
     connect(graphicsWidget, &SkeletonGraphicsWidget::removeNode, m_document, &Document::removeNode);
+    connect(graphicsWidget, &SkeletonGraphicsWidget::removePart, m_document, &Document::removePart);
     connect(graphicsWidget, &SkeletonGraphicsWidget::setEditMode, m_document, &Document::setEditMode);
     connect(graphicsWidget, &SkeletonGraphicsWidget::removeEdge, m_document, &Document::removeEdge);
     connect(graphicsWidget, &SkeletonGraphicsWidget::addEdge, m_document, &Document::addEdge);

src/skeletongraphicswidget.cpp

@@ -1732,6 +1732,59 @@ void SkeletonGraphicsWidget::deleteSelected()
     std::set<QUuid> nodeIdSet;
     std::set<QUuid> edgeIdSet;
     readSkeletonNodeAndEdgeIdSetFromRangeSelection(&nodeIdSet, &edgeIdSet);
+    
+    std::set<QUuid> partIds;
+    for (const auto &it: nodeIdSet) {
+        const SkeletonNode *node = m_document->findNode(it);
+        if (nullptr == node)
+            continue;
+        partIds.insert(node->partId);
+    }
+    for (const auto &it: edgeIdSet) {
+        const SkeletonEdge *edge = m_document->findEdge(it);
+        if (nullptr == edge)
+            continue;
+        partIds.insert(edge->partId);
+    }
+    std::set<QUuid> cleanupPartIds;
+    for (const auto &partId: partIds) {
+        const SkeletonPart *part = m_document->findPart(partId);
+        if (nullptr != part) {
+            bool allNodesSelected = true;
+            for (const auto &it: part->nodeIds) {
+                if (nodeIdSet.find(it) == nodeIdSet.end()) {
+                    allNodesSelected = false;
+                    break;
+                }
+            }
+            if (allNodesSelected) {
+                cleanupPartIds.insert(partId);
+            }
+        }
+    }
+    for (const auto &partId: cleanupPartIds) {
+        for (auto it = nodeIdSet.begin(); it != nodeIdSet.end(); ) {
+            const SkeletonNode *node = m_document->findNode(*it);
+            if (nullptr != node && node->partId == partId) {
+                it = nodeIdSet.erase(it);
+                continue;
+            }
+            ++it;
+        }
+        for (auto it = edgeIdSet.begin(); it != edgeIdSet.end(); ) {
+            const SkeletonEdge *edge = m_document->findEdge(*it);
+            if (nullptr != edge && edge->partId == partId) {
+                it = edgeIdSet.erase(it);
+                continue;
+            }
+            ++it;
+        }
+    }
+    
+    for (const auto &partId: cleanupPartIds) {
+        emit removePart(partId);
+    }
+    
     for (const auto &it: nodeIdSet) {
         m_deferredRemoveNodeIds.insert(it);
     }
@@ -1739,9 +1792,11 @@ void SkeletonGraphicsWidget::deleteSelected()
         m_deferredRemoveEdgeIds.insert(it);
     }
     
+    if (!nodeIdSet.empty() || !edgeIdSet.empty()) {
         if (nullptr == m_deferredRemoveTimer) {
             timeToRemoveDeferredNodesAndEdges();
         }
+    }
 }
 
 void SkeletonGraphicsWidget::shortcutDelete()

src/skeletongraphicswidget.h

@@ -468,6 +468,7 @@ signals:
     void scaleNodeByAddRadius(QUuid nodeId, float amount);
     void moveNodeBy(QUuid nodeId, float x, float y, float z);
     void removeNode(QUuid nodeId);
+    void removePart(QUuid partId);
     void setEditMode(SkeletonDocumentEditMode mode);
     void removeEdge(QUuid edgeId);
     void addEdge(QUuid fromNodeId, QUuid toNodeId);