ClassView: Replace QSharedPointer with std::shared_ptr

According to https://wiki.qt.io/Things_To_Look_Out_For_In_Reviews
QSharedPointer impl is poor and it's going to be removed from Qt 7.

Change-Id: I46a556c6ab558b4b86c7f9d767cac5b16302f326
Reviewed-by: hjk <hjk@qt.io>

src/plugins/classview/classviewmanager.cpp

@@ -47,7 +47,7 @@ static Manager *managerInstance = nullptr;
 */
 
 /*!
-    \fn void ClassView::Internal::Manager::treeDataUpdate(QSharedPointer<QStandardItem> result)
+    \fn void ClassView::Internal::Manager::treeDataUpdate(std::shared_ptr<QStandardItem> result)
 
     Emits a signal about a tree data update (to tree view). \a result holds the
     item with the current tree.
@@ -128,7 +128,7 @@ ParserTreeItem::ConstPtr ManagerPrivate::findItemByRoot(const QStandardItem *ite
         uiList.removeLast();
         const SymbolInformation &inf = Internal::symbolInformationFromItem(cur);
         internal = internal->child(inf);
-        if (internal.isNull())
+        if (!internal)
             break;
     }
 
@@ -147,7 +147,7 @@ Manager::Manager(QObject *parent)
     managerInstance = this;
 
     // register - to be able send between signal/slots
-    qRegisterMetaType<QSharedPointer<QStandardItem> >("QSharedPointer<QStandardItem>");
+    qRegisterMetaType<std::shared_ptr<QStandardItem>>("std::shared_ptr<QStandardItem>");
 
     initialize();
 
@@ -174,7 +174,7 @@ Manager *Manager::instance()
 bool Manager::canFetchMore(QStandardItem *item, bool skipRoot) const
 {
     ParserTreeItem::ConstPtr ptr = d->findItemByRoot(item, skipRoot);
-    if (ptr.isNull())
+    if (!ptr)
         return false;
     return ptr->canFetchMore(item);
 }
@@ -186,7 +186,7 @@ bool Manager::canFetchMore(QStandardItem *item, bool skipRoot) const
 void Manager::fetchMore(QStandardItem *item, bool skipRoot)
 {
     ParserTreeItem::ConstPtr ptr = d->findItemByRoot(item, skipRoot);
-    if (ptr.isNull())
+    if (!ptr)
         return;
     ptr->fetchMore(item);
 }
@@ -194,7 +194,7 @@ void Manager::fetchMore(QStandardItem *item, bool skipRoot)
 bool Manager::hasChildren(QStandardItem *item) const
 {
     ParserTreeItem::ConstPtr ptr = d->findItemByRoot(item);
-    if (ptr.isNull())
+    if (!ptr)
         return false;
     return ptr->childCount();
 }
@@ -255,8 +255,8 @@ void Manager::initialize()
         if (!state())
             return;
 
-        QSharedPointer<QStandardItem> rootItem(new QStandardItem());
-        d->m_root->fetchMore(rootItem.data());
+        std::shared_ptr<QStandardItem> rootItem(new QStandardItem());
+        d->m_root->fetchMore(rootItem.get());
         emit treeDataUpdate(rootItem);
     }, Qt::QueuedConnection);
 

src/plugins/classview/classviewmanager.h

@@ -4,7 +4,6 @@
 #pragma once
 
 #include <QObject>
-#include <QSharedPointer>
 #include <QStandardItem>
 
 namespace Utils { class FilePath; }
@@ -32,7 +31,7 @@ public:
     void onWidgetVisibilityIsChanged(bool visibility);
 
 signals:
-    void treeDataUpdate(QSharedPointer<QStandardItem> result);
+    void treeDataUpdate(std::shared_ptr<QStandardItem> result);
 
 private:
     void initialize();

src/plugins/classview/classviewnavigationwidget.cpp

@@ -211,9 +211,9 @@ void NavigationWidget::onItemDoubleClicked(const QModelIndex &index)
     model root item. The function does nothing if null is passed.
 */
 
-void NavigationWidget::onDataUpdate(QSharedPointer<QStandardItem> result)
+void NavigationWidget::onDataUpdate(std::shared_ptr<QStandardItem> result)
 {
-    if (result.isNull())
+    if (!result)
         return;
 
     QElapsedTimer timer;
@@ -223,9 +223,9 @@ void NavigationWidget::onDataUpdate(QSharedPointer<QStandardItem> result)
     // might be just a root - if a lazy data population is enabled.
     // so expanded items must be parsed and 'fetched'
 
-    fetchExpandedItems(result.data(), treeModel->invisibleRootItem());
+    fetchExpandedItems(result.get(), treeModel->invisibleRootItem());
 
-    treeModel->moveRootToTarget(result.data());
+    treeModel->moveRootToTarget(result.get());
 
     // expand top level projects
     QModelIndex sessionIndex;

src/plugins/classview/classviewnavigationwidget.h

@@ -7,7 +7,6 @@
 
 #include <QList>
 #include <QPointer>
-#include <QSharedPointer>
 #include <QStandardItem>
 #include <QToolButton>
 #include <QWidget>
@@ -42,7 +41,7 @@ public:
     void onItemActivated(const QModelIndex &index);
     void onItemDoubleClicked(const QModelIndex &index);
 
-    void onDataUpdate(QSharedPointer<QStandardItem> result);
+    void onDataUpdate(std::shared_ptr<QStandardItem> result);
 
     void onFullProjectsModeToggled(bool state);
 

src/plugins/classview/classviewparser.cpp

@@ -122,7 +122,7 @@ ParserTreeItem::ConstPtr Parser::parse()
         const FilePath projectPath = it.key();
         const SymbolInformation projectInfo = { projectCache.projectName, projectPath.toString() };
         ParserTreeItem::ConstPtr item = getCachedOrParseProjectTree(projectPath, projectCache.fileNames);
-        if (item.isNull())
+        if (!item)
             continue;
         projectTrees.insert(projectInfo, item);
     }
@@ -159,7 +159,7 @@ ParserTreeItem::ConstPtr Parser::getParseProjectTree(const FilePath &projectPath
         revision += doc->revision();
 
         const ParserTreeItem::ConstPtr docTree = getCachedOrParseDocumentTree(doc);
-        if (docTree.isNull())
+        if (!docTree)
             continue;
         docTrees.append(docTree);
     }
@@ -185,7 +185,7 @@ ParserTreeItem::ConstPtr Parser::getCachedOrParseProjectTree(const FilePath &pro
                                                              const QSet<FilePath> &filesInProject)
 {
     const auto it = d->m_projectCache.constFind(projectPath);
-    if (it != d->m_projectCache.constEnd() && !it.value().tree.isNull()) {
+    if (it != d->m_projectCache.constEnd() && it.value().tree) {
         // calculate project's revision
         unsigned revision = 0;
         for (const FilePath &fileInProject : filesInProject) {
@@ -236,7 +236,7 @@ ParserTreeItem::ConstPtr Parser::getCachedOrParseDocumentTree(const CPlusPlus::D
         return ParserTreeItem::ConstPtr();
 
     const auto it = d->m_documentCache.constFind(doc->filePath());
-    if (it != d->m_documentCache.constEnd() && !it.value().tree.isNull()
+    if (it != d->m_documentCache.constEnd() && it.value().tree
             && it.value().treeRevision == doc->revision()) {
         return it.value().tree;
     }

src/plugins/classview/classviewparsertreeitem.cpp

@@ -44,7 +44,7 @@ public:
 
 void ParserTreeItemPrivate::mergeWith(const ParserTreeItem::ConstPtr &target)
 {
-    if (target.isNull())
+    if (!target)
         return;
 
     m_symbolLocations.unite(target->d->m_symbolLocations);
@@ -56,11 +56,11 @@ void ParserTreeItemPrivate::mergeWith(const ParserTreeItem::ConstPtr &target)
         const ParserTreeItem::ConstPtr &targetChild = it.value();
 
         ParserTreeItem::ConstPtr child = m_symbolInformations.value(inf);
-        if (!child.isNull()) {
+        if (child) {
             child->d->mergeWith(targetChild);
         } else {
-            const ParserTreeItem::ConstPtr clone = targetChild.isNull() ? ParserTreeItem::ConstPtr()
-                                                                   : targetChild->d->cloneTree();
+            const ParserTreeItem::ConstPtr clone = targetChild ? targetChild->d->cloneTree()
+                                                               : ParserTreeItem::ConstPtr();
             m_symbolInformations.insert(inf, clone);
         }
     }
@@ -99,7 +99,7 @@ void ParserTreeItemPrivate::mergeSymbol(const CPlusPlus::Symbol *symbol)
     // Better to improve qHash timing
     ParserTreeItem::ConstPtr childItem = m_symbolInformations.value(information);
 
-    if (childItem.isNull())
+    if (!childItem)
         childItem = ParserTreeItem::ConstPtr(new ParserTreeItem());
 
     // locations have 1-based column in Symbol, use the same here.
@@ -139,7 +139,7 @@ ParserTreeItem::ConstPtr ParserTreeItemPrivate::cloneTree() const
 
     for (auto it = m_symbolInformations.cbegin(); it != m_symbolInformations.cend(); ++it) {
         ParserTreeItem::ConstPtr child = it.value();
-        if (child.isNull())
+        if (!child)
             continue;
         newItem->d->m_symbolInformations.insert(it.key(), child->d->cloneTree());
     }
@@ -281,7 +281,7 @@ void ParserTreeItem::fetchMore(QStandardItem *item) const
         add->setData(inf.type(), Constants::SymbolTypeRole);
         add->setData(inf.iconType(), Constants::IconTypeRole);
 
-        if (!ptr.isNull()) {
+        if (ptr) {
             // icon
             const Utils::FilePath &filePath = ptr->projectFilePath();
             if (!filePath.isEmpty()) {
@@ -311,8 +311,8 @@ void ParserTreeItem::debugDump(int indent) const
         const SymbolInformation &inf = it.key();
         const ConstPtr &child = it.value();
         qDebug() << QString(2 * indent, QLatin1Char(' ')) << inf.iconType() << inf.name()
-                 << inf.type() << child.isNull();
-        if (!child.isNull())
+                 << inf.type() << bool(child);
+        if (child)
             child->debugDump(indent + 1);
     }
 }

src/plugins/classview/classviewparsertreeitem.h

@@ -8,8 +8,6 @@
 
 #include <cplusplus/CppDocument.h>
 
-#include <QSharedPointer>
-
 QT_BEGIN_NAMESPACE
 template <typename K, typename T>
 class QHash;
@@ -24,7 +22,7 @@ class ParserTreeItemPrivate;
 class ParserTreeItem
 {
 public:
-    using ConstPtr = QSharedPointer<const ParserTreeItem>;
+    using ConstPtr = std::shared_ptr<const ParserTreeItem>;
 
 public:
     ParserTreeItem();