ProjectTree: Fix signal emissions for nodes that are not yet mapped

The Generic Project Manager builds the tree from the bottom to the
top. Previously no signals were emitted while doing that since
the watchers were added on adding the top level node at the end.

With the new ProjectTree that leads to lots of signals, and leaves
the FlatModel confussed, as that expects the nodes to be already
in the hierarchy and crashes otherwise.

Restore this behavior by checking if the affected nodes are in
the hierarchy.

Change-Id: I832b348867a8abad2afef11297b44f058592cb1d
Reviewed-by: Christian Stenger <christian.stenger@theqtcompany.com>
Reviewed-by: Daniel Teske <daniel.teske@theqtcompany.com>

src/plugins/projectexplorer/projecttree.cpp

@@ -232,26 +232,38 @@ void ProjectTree::updateContext()
 
 void ProjectTree::emitNodeUpdated(Node *node)
 {
+    if (!isInNodeHierarchy(node))
+        return;
     emit nodeUpdated(node);
 }
 
 void ProjectTree::emitAboutToChangeShowInSimpleTree(FolderNode *node)
 {
+    if (!isInNodeHierarchy(node))
+        return;
     emit aboutToChangeShowInSimpleTree(node);
 }
 
 void ProjectTree::emitShowInSimpleTreeChanged(FolderNode *node)
 {
+    if (!isInNodeHierarchy(node))
+        return;
     emit showInSimpleTreeChanged(node);
 }
 
 void ProjectTree::emitFoldersAboutToBeAdded(FolderNode *parentFolder, const QList<FolderNode *> &newFolders)
 {
+    if (!isInNodeHierarchy(parentFolder))
+        return;
+
     emit foldersAboutToBeAdded(parentFolder, newFolders);
 }
 
-void ProjectTree::emitFoldersAdded()
+void ProjectTree::emitFoldersAdded(FolderNode *folder)
 {
+    if (!isInNodeHierarchy(folder))
+        return;
+
     emit foldersAdded();
 
     if (Utils::anyOf(m_projectTreeWidgets, &ProjectTreeWidget::hasFocus))
@@ -262,6 +274,9 @@ void ProjectTree::emitFoldersAdded()
 
 void ProjectTree::emitFoldersAboutToBeRemoved(FolderNode *parentFolder, const QList<FolderNode *> &staleFolders)
 {
+    if (!isInNodeHierarchy(parentFolder))
+        return;
+
     Node *n = ProjectTree::currentNode();
     while (n) {
         if (FolderNode *fn = dynamic_cast<FolderNode *>(n)) {
@@ -279,8 +294,11 @@ void ProjectTree::emitFoldersAboutToBeRemoved(FolderNode *parentFolder, const QL
     emit foldersAboutToBeRemoved(parentFolder, staleFolders);
 }
 
-void ProjectTree::emitFoldersRemoved()
+void ProjectTree::emitFoldersRemoved(FolderNode *folder)
 {
+    if (!isInNodeHierarchy(folder))
+        return;
+
     emit foldersRemoved();
 
     if (m_resetCurrentNodeFolder) {
@@ -291,11 +309,16 @@ void ProjectTree::emitFoldersRemoved()
 
 void ProjectTree::emitFilesAboutToBeAdded(FolderNode *folder, const QList<FileNode *> &newFiles)
 {
+    if (!isInNodeHierarchy(folder))
+        return;
     emit filesAboutToBeAdded(folder, newFiles);
 }
 
-void ProjectTree::emitFilesAdded()
+void ProjectTree::emitFilesAdded(FolderNode *folder)
 {
+    if (!isInNodeHierarchy(folder))
+        return;
+
     emit filesAdded();
 
     if (Utils::anyOf(m_projectTreeWidgets, &ProjectTreeWidget::hasFocus))
@@ -306,6 +329,9 @@ void ProjectTree::emitFilesAdded()
 
 void ProjectTree::emitFilesAboutToBeRemoved(FolderNode *folder, const QList<FileNode *> &staleFiles)
 {
+    if (!isInNodeHierarchy(folder))
+        return;
+
     if (FileNode *fileNode = dynamic_cast<FileNode *>(m_currentNode))
         if (staleFiles.contains(fileNode))
             m_resetCurrentNodeFile = false;
@@ -313,8 +339,10 @@ void ProjectTree::emitFilesAboutToBeRemoved(FolderNode *folder, const QList<File
     emit filesAboutToBeRemoved(folder, staleFiles);
 }
 
-void ProjectTree::emitFilesRemoved()
+void ProjectTree::emitFilesRemoved(FolderNode *folder)
 {
+    if (!isInNodeHierarchy(folder))
+        return;
     emit filesRemoved();
 
     if (m_resetCurrentNodeFile) {
@@ -325,11 +353,15 @@ void ProjectTree::emitFilesRemoved()
 
 void ProjectTree::emitNodeSortKeyAboutToChange(Node *node)
 {
+    if (!isInNodeHierarchy(node))
+        return;
     emit nodeSortKeyAboutToChange(node);
 }
 
-void ProjectTree::emitNodeSortKeyChanged()
+void ProjectTree::emitNodeSortKeyChanged(Node *node)
 {
+    if (!isInNodeHierarchy(node))
+        return;
     emit nodeSortKeyChanged();
 }
 
@@ -372,3 +404,14 @@ bool ProjectTree::hasFocus(ProjectTreeWidget *widget)
 {
     return widget && widget->focusWidget() && widget->focusWidget()->hasFocus();
 }
+
+bool ProjectTree::isInNodeHierarchy(Node *n)
+{
+    Node *sessionNode = SessionManager::sessionNode();
+    do {
+        if (n == sessionNode)
+            return true;
+        n = n->parentFolderNode();
+    } while (n);
+    return false;
+}