CppLocatorData: Introduce findSymbols

Reuse it inside cppquickfixes.cpp. Don't use global
CppModelManager::classesFilter, but more specialized and
much faster CppLocatorData::findSymbols.

The return value of CppLocatorData::findSymbols is a list of
IndexItem::Ptr instead of LocatorFilterEntries, so that we
may avoid using internalData for passing IndexItem::Ptr.

Change-Id: I14591b3fcf4de34d6fea23b9f354fe898123c9af
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>

src/plugins/cppeditor/cpplocatordata.cpp

@@ -20,6 +20,22 @@ CppLocatorData::CppLocatorData()
     m_pendingDocuments.reserve(MaxPendingDocuments);
 }
 
+QList<IndexItem::Ptr> CppLocatorData::findSymbols(IndexItem::ItemType type,
+                                                  const QString &symbolName) const
+{
+    QList<IndexItem::Ptr> matches;
+    filterAllFiles([&](const IndexItem::Ptr &info) {
+        if (info->type() & type) {
+            if (info->symbolName() == symbolName || info->scopedSymbolName() == symbolName)
+                matches << info;
+        }
+        if (info->type() & IndexItem::Enum)
+            return IndexItem::Continue;
+        return IndexItem::Recurse;
+    });
+    return matches;
+}
+
 void CppLocatorData::onDocumentUpdated(const CPlusPlus::Document::Ptr &document)
 {
     QMutexLocker locker(&m_pendingDocumentsMutex);

src/plugins/cppeditor/cpplocatordata.h

@@ -33,6 +33,8 @@ public:
                 return;
     }
 
+    QList<IndexItem::Ptr> findSymbols(IndexItem::ItemType type, const QString &symbolName) const;
+
 public slots:
     void onDocumentUpdated(const CPlusPlus::Document::Ptr &document);
     void onAboutToRemoveFiles(const QStringList &files);

src/plugins/cppeditor/cppquickfixes.cpp

@@ -10,6 +10,7 @@
 #include "cppeditorwidget.h"
 #include "cppfunctiondecldeflink.h"
 #include "cppinsertvirtualmethods.h"
+#include "cpplocatordata.h"
 #include "cpppointerdeclarationformatter.h"
 #include "cppquickfixassistant.h"
 #include "cppquickfixprojectsettings.h"
@@ -1990,14 +1991,14 @@ Snapshot forwardingHeaders(const CppQuickFixInterface &interface)
     return result;
 }
 
-bool matchName(const Name *name, QList<Core::LocatorFilterEntry> *matches, QString *className) {
+QList<IndexItem::Ptr> matchName(const Name *name, QString *className)
+{
     if (!name)
-        return false;
+        return {};
 
     QString simpleName;
-    if (Core::ILocatorFilter *classesFilter = CppModelManager::instance()->classesFilter()) {
-        QFutureInterface<Core::LocatorFilterEntry> dummy;
-
+    QList<IndexItem::Ptr> matches;
+    CppLocatorData *locatorData = CppModelManager::instance()->locatorData();
     const Overview oo;
     if (const QualifiedNameId *qualifiedName = name->asQualifiedNameId()) {
         const Name *name = qualifiedName->name();
@@ -2006,9 +2007,8 @@ bool matchName(const Name *name, QList<Core::LocatorFilterEntry> *matches, QStri
         } else {
             simpleName = oo.prettyName(name);
             *className = simpleName;
-                classesFilter->prepareSearch(*className);
-                *matches = classesFilter->matchesFor(dummy, *className);
-                if (matches->empty()) {
+            matches = locatorData->findSymbols(IndexItem::Class, *className);
+            if (matches.isEmpty()) {
                 if (const Name *name = qualifiedName->base()) {
                     if (const TemplateNameId *templateName = name->asTemplateNameId())
                         *className = templateNameAsString(templateName);
@@ -2023,15 +2023,13 @@ bool matchName(const Name *name, QList<Core::LocatorFilterEntry> *matches, QStri
         *className = oo.prettyName(name);
     }
 
-        if (matches->empty()) {
-            classesFilter->prepareSearch(*className);
-            *matches = classesFilter->matchesFor(dummy, *className);
-        }
-        if (matches->empty() && !simpleName.isEmpty())
-            *className = simpleName;
-    }
+    if (matches.isEmpty())
+        matches = locatorData->findSymbols(IndexItem::Class, *className);
 
-    return !matches->empty();
+    if (matches.isEmpty() && !simpleName.isEmpty())
+        *className = simpleName;
+
+    return matches;
 }
 
 } // anonymous namespace
@@ -2048,17 +2046,16 @@ void AddIncludeForUndefinedIdentifier::match(const CppQuickFixInterface &interfa
         return;
 
     QString className;
-    QList<Core::LocatorFilterEntry> matches;
     const QString currentDocumentFilePath = interface.semanticInfo().doc->filePath().toString();
     const ProjectExplorer::HeaderPaths headerPaths = relevantHeaderPaths(currentDocumentFilePath);
     FilePaths headers;
 
+    const QList<IndexItem::Ptr> matches = matchName(nameAst->name, &className);
     // Find an include file through the locator
-    if (matchName(nameAst->name, &matches, &className)) {
+    if (!matches.isEmpty()) {
         QList<IndexItem::Ptr> indexItems;
         const Snapshot forwardHeaders = forwardingHeaders(interface);
-        for (const Core::LocatorFilterEntry &entry : std::as_const(matches)) {
-            IndexItem::Ptr info = entry.internalData.value<IndexItem::Ptr>();
+        for (const IndexItem::Ptr &info : matches) {
             if (!info || info->symbolName() != className)
                 continue;
             indexItems << info;