ProjectExplorer: Introduce a FolderNode::findProjectNode()

And use it.

Change-Id: Iaf13c4661e397bdb4d756c352683b696e337c8af
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/plugins/projectexplorer/project.cpp

@@ -885,14 +885,12 @@ bool Project::hasParsingData() const
 
 const ProjectNode *Project::findNodeForBuildKey(const QString &buildKey) const
 {
-    const ProjectNode *result = nullptr;
+    if (!d->m_rootProjectNode)
-    if (d->m_rootProjectNode) {
+        return nullptr;
-        d->m_rootProjectNode->forEachProjectNode([&result, buildKey](const ProjectNode *node) {
+
-            if (node->buildKey() == buildKey)
+    return d->m_rootProjectNode->findProjectNode([buildKey](const ProjectNode *node) {
-                result = node;
+        return node->buildKey() == buildKey;
-        });
+    });
-    }
-    return result;
 }
 
 ProjectImporter *Project::projectImporter() const

src/plugins/projectexplorer/projectnodes.cpp

@@ -525,6 +525,22 @@ void FolderNode::forEachProjectNode(const std::function<void(const ProjectNode *
     }
 }
 
+const ProjectNode *FolderNode::findProjectNode(const std::function<bool(const ProjectNode *)> &predicate) const
+{
+    if (const ProjectNode *projectNode = asProjectNode()) {
+        if (predicate(projectNode))
+            return projectNode;
+    }
+
+    for (const std::unique_ptr<Node> &n : m_nodes) {
+        if (FolderNode *fn = n->asFolderNode()) {
+            if (const ProjectNode *pn = fn->findProjectNode(predicate))
+                return pn;
+        }
+    }
+    return nullptr;
+}
+
 const QList<Node *> FolderNode::nodes() const
 {
     return Utils::toRawPointer<QList>(m_nodes);

src/plugins/projectexplorer/projectnodes.h

@@ -219,6 +219,7 @@ public:
                      const std::function<bool(const FolderNode *)> &folderFilterTask = {}) const;
     void forEachGenericNode(const std::function<void(Node *)> &genericTask) const;
     void forEachProjectNode(const std::function<void(const ProjectNode *)> &genericTask) const;
+    const ProjectNode *findProjectNode(const std::function<bool(const ProjectNode *)> &predicate) const;
     const QList<Node *> nodes() const;
     QList<FileNode *> fileNodes() const;
     FileNode *fileNode(const Utils::FileName &file) const;