qmake: Introduce tree structure into QmakePriFiles

Change-Id: I0071c54a08d4775a34ab91e61be25f98352a5ed0
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

src/plugins/qmakeprojectmanager/qmakeparsernodes.cpp

@@ -216,6 +216,7 @@ Q_LOGGING_CATEGORY(qmakeParse, "qtc.qmake.parsing");
 uint qHash(Variable key, uint seed) { return ::qHash(static_cast<int>(key), seed); }
 
 namespace Internal {
+
 class QmakeEvalInput
 {
 public:
@@ -293,9 +294,20 @@ FileName QmakePriFile::directoryPath() const
     return filePath().parentDir();
 }
 
+QmakePriFile *QmakePriFile::parent() const
+{
+    return m_parent;
+}
+
+QVector<QmakePriFile *> QmakePriFile::children() const
+{
+    return m_children;
+}
+
 QmakePriFile::~QmakePriFile()
 {
     watchFolders(QSet<QString>());
+    qDeleteAll(m_children);
 }
 
 void QmakePriFile::scheduleUpdate()
@@ -419,10 +431,6 @@ void QmakePriFile::processValues(QmakePriFileEvalResult &result)
 
 void QmakePriFile::update(const Internal::QmakePriFileEvalResult &result)
 {
-    // add project file node
-    if (fileNodes().isEmpty())
-        addNode(new FileNode(filePath(), FileType::Project, false));
-
     m_recursiveEnumerateFiles = result.recursiveEnumerateFiles;
     watchFolders(result.folders.toSet());
 
@@ -958,6 +966,20 @@ void QmakePriFile::changeFiles(const QString &mimeType,
     includeFile->deref();
 }
 
+void QmakePriFile::addChild(QmakePriFile *pf)
+{
+    QTC_ASSERT(!m_children.contains(pf), return);
+    QTC_ASSERT(!pf->parent(), return);
+    m_children.append(pf);
+    pf->setParent(this);
+}
+
+void QmakePriFile::setParent(QmakePriFile *p)
+{
+    QTC_ASSERT(!m_parent, return);
+    m_parent = p;
+}
+
 bool QmakePriFile::setProVariable(const QString &var, const QStringList &values, const QString &scope, int flags)
 {
     if (!prepareForChange())
@@ -1748,9 +1770,9 @@ void QmakeProFile::applyEvaluate(QmakeEvalResult *evalResult)
         for (QmakeIncludedPriFile *priFile : tree->children) {
             // Loop preventation, make sure that exact same node is not in our parent chain
             bool loop = false;
-            Node *n = pn;
-            while ((n = n->parentFolderNode())) {
-                if (dynamic_cast<QmakePriFile *>(n) && n->filePath() == priFile->name) {
+            QmakePriFile *n = pn;
+            while ((n = n->parent())) {
+                if (n->filePath() == priFile->name) {
                     loop = true;
                     break;
                 }
@@ -1761,14 +1783,14 @@ void QmakeProFile::applyEvaluate(QmakeEvalResult *evalResult)
 
             if (priFile->proFile) {
                 QmakePriFile *qmakePriFileNode = new QmakePriFile(m_project, this, priFile->name);
-                pn->addNode(qmakePriFileNode);
+                pn->addChild(qmakePriFileNode);
                 qmakePriFileNode->setIncludedInExactParse(
                             (result->state == QmakeEvalResult::EvalOk) && pn->includedInExactParse());
                 qmakePriFileNode->update(priFile->result);
                 toCompare.append(qMakePair(qmakePriFileNode, priFile));
             } else {
                 QmakeProFile *qmakeProFileNode = new QmakeProFile(m_project, priFile->name);
-                pn->addNode(qmakeProFileNode);
+                pn->addChild(qmakeProFileNode);
                 qmakeProFileNode->setIncludedInExactParse(
                             result->exactSubdirs.contains(qmakeProFileNode->filePath())
                             && pn->includedInExactParse());

src/plugins/qmakeprojectmanager/qmakeparsernodes.h

@@ -101,7 +101,6 @@ enum class Variable {
 uint qHash(Variable key, uint seed = 0);
 
 namespace Internal {
-
 class QmakeEvalInput;
 class QmakeEvalResult;
 class QmakePriFileEvalResult;
@@ -119,6 +118,9 @@ public:
     Utils::FileName filePath() const;
     Utils::FileName directoryPath() const;
 
+    QmakePriFile *parent() const;
+    QVector<QmakePriFile *> children() const;
+
     void update(const Internal::QmakePriFileEvalResult &result);
 
     // ProjectNode interface
@@ -181,8 +183,11 @@ protected:
                      ChangeType change,
                      Change mode = Change::Save);
 
+    void addChild(QmakePriFile *pf);
 
 private:
+    void setParent(QmakePriFile *p);
+
     bool prepareForChange();
     static bool ensureWriteableProFile(const QString &file);
     static QPair<ProFile *, QStringList> readProFile(const QString &file);
@@ -206,6 +211,8 @@ private:
 
     QmakeProject *m_project = nullptr;
     QmakeProFile *m_qmakeProFile = nullptr;
+    QmakePriFile *m_parent = nullptr;
+    QVector<QmakePriFile *> m_children;
 
     std::unique_ptr<Core::IDocument> m_priFileDocument;