CppTools: Remove processEvents call from follow symbol

processEvents is a bad way of dealing with asynchronous
requests. Use QFutureWatcher for that purpose.

Change-Id: I3839cb9db80a6d391f6af1178e96986a325b7b99
Reviewed-by: Marco Bubke <marco.bubke@qt.io>

22 files changed, 199 insertions, 128 deletions

diff --git a/src/libs/utils/link.h b/src/libs/utils/link.h
index 8f89e4e7fd..d6df02c076 100644
--- a/src/libs/utils/link.h
+++ b/src/libs/utils/link.h
@@ -28,6 +28,8 @@
 #include <QString>
 #include <qmetatype.h>
 
+#include <functional>
+
 namespace Utils {
 
 struct Link
@@ -57,6 +59,8 @@ struct Link
     int targetColumn;
 };
 
+using ProcessLinkCallback = std::function<void(const Link &)>;
+
 } // namespace Utils
 
 Q_DECLARE_METATYPE(Utils::Link)
diff --git a/src/plugins/clangcodemodel/clangfollowsymbol.cpp b/src/plugins/clangcodemodel/clangfollowsymbol.cpp
index f9ab5bb211..41872a4f51 100644
--- a/src/plugins/clangcodemodel/clangfollowsymbol.cpp
+++ b/src/plugins/clangcodemodel/clangfollowsymbol.cpp
@@ -93,12 +93,13 @@ static Utils::Link linkAtCursor(QTextCursor cursor, const QString &filePath, uin
     return Link();
 }
 
-Utils::Link ClangFollowSymbol::findLink(const CppTools::CursorInEditor &data,
-                                        bool resolveTarget,
-                                        const CPlusPlus::Snapshot &snapshot,
-                                        const CPlusPlus::Document::Ptr &documentFromSemanticInfo,
-                                        CppTools::SymbolFinder *symbolFinder,
-                                        bool inNextSplit)
+void ClangFollowSymbol::findLink(const CppTools::CursorInEditor &data,
+                                 ::Utils::ProcessLinkCallback &&processLinkCallback,
+                                 bool resolveTarget,
+                                 const CPlusPlus::Snapshot &snapshot,
+                                 const CPlusPlus::Document::Ptr &documentFromSemanticInfo,
+                                 CppTools::SymbolFinder *symbolFinder,
+                                 bool inNextSplit)
 {
     int lineNumber = 0, positionInBlock = 0;
     QTextCursor cursor = Utils::Text::wordStartCursor(data.cursor());
@@ -111,34 +112,40 @@ Utils::Link ClangFollowSymbol::findLink(const CppTools::CursorInEditor &data,
     ClangEditorDocumentProcessor *processor = ClangEditorDocumentProcessor::get(
                 data.filePath().toString());
     if (!processor)
-        return Link();
+        return processLinkCallback(Utils::Link());
 
-    if (!resolveTarget)
-        return linkAtCursor(cursor, data.filePath().toString(), line, column, processor);
+    if (!resolveTarget) {
+        processLinkCallback(linkAtCursor(cursor, data.filePath().toString(), line, column,
+                                         processor));
+        return;
+    }
 
-    QFuture<CppTools::SymbolInfo> info
+    QFuture<CppTools::SymbolInfo> infoFuture
             = processor->requestFollowSymbol(static_cast<int>(line),
                                              static_cast<int>(column));
 
-    if (info.isCanceled())
-        return Link();
-
-    while (!info.isFinished()) {
-        if (info.isCanceled())
-            return Link();
-        QCoreApplication::processEvents(QEventLoop::ExcludeUserInputEvents);
-    }
-    CppTools::SymbolInfo result = info.result();
-
-    // We did not fail but the result is empty
-    if (result.fileName.isEmpty()) {
-        const CppTools::RefactoringEngineInterface &refactoringEngine
-                = *CppTools::CppModelManager::instance();
-        return refactoringEngine.globalFollowSymbol(data, snapshot, documentFromSemanticInfo,
-                                                    symbolFinder, inNextSplit);
-    }
-
-    return Link(result.fileName, result.startLine, result.startColumn - 1);
+    if (infoFuture.isCanceled())
+        return processLinkCallback(Utils::Link());
+
+    QObject::connect(&m_watcher, &FutureSymbolWatcher::finished,
+                     [=, watcher=&m_watcher, callback=std::move(processLinkCallback)]() mutable {
+        CppTools::SymbolInfo result = watcher->result();
+        // We did not fail but the result is empty
+        if (result.fileName.isEmpty()) {
+            const CppTools::RefactoringEngineInterface &refactoringEngine
+                    = *CppTools::CppModelManager::instance();
+            refactoringEngine.globalFollowSymbol(data,
+                                                 std::move(callback),
+                                                 snapshot,
+                                                 documentFromSemanticInfo,
+                                                 symbolFinder,
+                                                 inNextSplit);
+        } else {
+            callback(Link(result.fileName, result.startLine, result.startColumn - 1));
+        }
+    });
+
+    m_watcher.setFuture(infoFuture);
 }
 
 } // namespace Internal
diff --git a/src/plugins/clangcodemodel/clangfollowsymbol.h b/src/plugins/clangcodemodel/clangfollowsymbol.h
index 8c9da83592..dd7abb38fc 100644
--- a/src/plugins/clangcodemodel/clangfollowsymbol.h
+++ b/src/plugins/clangcodemodel/clangfollowsymbol.h
@@ -26,6 +26,9 @@
 #pragma once
 
 #include <cpptools/followsymbolinterface.h>
+#include <cpptools/cppsymbolinfo.h>
+
+#include <QFutureWatcher>
 
 namespace ClangCodeModel {
 namespace Internal {
@@ -33,12 +36,16 @@ namespace Internal {
 class ClangFollowSymbol : public CppTools::FollowSymbolInterface
 {
 public:
-    Link findLink(const CppTools::CursorInEditor &data,
+    void findLink(const CppTools::CursorInEditor &data,
+                  ::Utils::ProcessLinkCallback &&processLinkCallback,
                   bool resolveTarget,
                   const CPlusPlus::Snapshot &snapshot,
                   const CPlusPlus::Document::Ptr &documentFromSemanticInfo,
                   CppTools::SymbolFinder *symbolFinder,
                   bool inNextSplit) override;
+private:
+    using FutureSymbolWatcher = QFutureWatcher<CppTools::SymbolInfo>;
+    FutureSymbolWatcher m_watcher;
 };
 
 } // namespace Internal
diff --git a/src/plugins/clangcodemodel/clangrefactoringengine.h b/src/plugins/clangcodemodel/clangrefactoringengine.h
index 10ad96aa0d..fee9a85cf5 100644
--- a/src/plugins/clangcodemodel/clangrefactoringengine.h
+++ b/src/plugins/clangcodemodel/clangrefactoringengine.h
@@ -46,11 +46,13 @@ public:
     void globalRename(const CppTools::CursorInEditor &, CppTools::UsagesCallback &&,
                       const QString &) override {}
     void findUsages(const CppTools::CursorInEditor &, CppTools::UsagesCallback &&) const override {}
-    Link globalFollowSymbol(const CppTools::CursorInEditor &, const CPlusPlus::Snapshot &,
-                            const CPlusPlus::Document::Ptr &, CppTools::SymbolFinder *,
+    void globalFollowSymbol(const CppTools::CursorInEditor &,
+                            ::Utils::ProcessLinkCallback &&,
+                            const CPlusPlus::Snapshot &,
+                            const CPlusPlus::Document::Ptr &,
+                            CppTools::SymbolFinder *,
                             bool) const override
     {
-        return Link();
     }
 
 private:
diff --git a/src/plugins/clangrefactoring/refactoringengine.cpp b/src/plugins/clangrefactoring/refactoringengine.cpp
index 7c69cfc9d1..952ed9bf19 100644
--- a/src/plugins/clangrefactoring/refactoringengine.cpp
+++ b/src/plugins/clangrefactoring/refactoringengine.cpp
@@ -123,11 +123,12 @@ void RefactoringEngine::findUsages(const CppTools::CursorInEditor &data,
     showUsagesCallback(locationsAt(data));
 }
 
-RefactoringEngine::Link RefactoringEngine::globalFollowSymbol(const CppTools::CursorInEditor &data,
-                                                              const CPlusPlus::Snapshot &,
-                                                              const CPlusPlus::Document::Ptr &,
-                                                              CppTools::SymbolFinder *,
-                                                              bool) const
+void RefactoringEngine::globalFollowSymbol(const CppTools::CursorInEditor &data,
+                                           Utils::ProcessLinkCallback &&processLinkCallback,
+                                           const CPlusPlus::Snapshot &,
+                                           const CPlusPlus::Document::Ptr &,
+                                           CppTools::SymbolFinder *,
+                                           bool) const
 {
     // TODO: replace that with specific followSymbol query
     const CppTools::Usages usages = locationsAt(data);
@@ -138,7 +139,7 @@ RefactoringEngine::Link RefactoringEngine::globalFollowSymbol(const CppTools::Cu
         return true;
     });
 
-    return Link(usage.path, usage.line, usage.column);
+    processLinkCallback(Link(usage.path, usage.line, usage.column));
 }
 
 bool RefactoringEngine::isRefactoringEngineAvailable() const
diff --git a/src/plugins/clangrefactoring/refactoringengine.h b/src/plugins/clangrefactoring/refactoringengine.h
index 951a18fb53..739b545310 100644
--- a/src/plugins/clangrefactoring/refactoringengine.h
+++ b/src/plugins/clangrefactoring/refactoringengine.h
@@ -57,7 +57,8 @@ public:
                       const QString &) override;
     void findUsages(const CppTools::CursorInEditor &data,
                     CppTools::UsagesCallback &&showUsagesCallback) const override;
-    Link globalFollowSymbol(const CppTools::CursorInEditor &data,
+    void globalFollowSymbol(const CppTools::CursorInEditor &data,
+                            Utils::ProcessLinkCallback &&processLinkCallback,
                             const CPlusPlus::Snapshot &,
                             const CPlusPlus::Document::Ptr &,
                             CppTools::SymbolFinder *,
diff --git a/src/plugins/cmakeprojectmanager/cmakeeditor.cpp b/src/plugins/cmakeprojectmanager/cmakeeditor.cpp
index a197345419..a1b529e3e9 100644
--- a/src/plugins/cmakeprojectmanager/cmakeeditor.cpp
+++ b/src/plugins/cmakeprojectmanager/cmakeeditor.cpp
@@ -117,7 +117,10 @@ public:
 
 private:
     bool save(const QString &fileName = QString());
-    Utils::Link findLinkAt(const QTextCursor &cursor, bool resolveTarget = true, bool inNextSplit = false) override;
+    void findLinkAt(const QTextCursor &cursor,
+                    Utils::ProcessLinkCallback &&processLinkCallback,
+                    bool resolveTarget = true,
+                    bool inNextSplit = false) override;
     void contextMenuEvent(QContextMenuEvent *e) override;
 };
 
@@ -136,8 +139,10 @@ static bool isValidFileNameChar(const QChar &c)
             || c == QLatin1Char('\\');
 }
 
-Utils::Link CMakeEditorWidget::findLinkAt(const QTextCursor &cursor,
-                                          bool/* resolveTarget*/, bool /*inNextSplit*/)
+void CMakeEditorWidget::findLinkAt(const QTextCursor &cursor,
+                                   Utils::ProcessLinkCallback &&processLinkCallback,
+                                   bool/* resolveTarget*/,
+                                   bool /*inNextSplit*/)
 {
     Utils::Link link;
 
@@ -149,7 +154,7 @@ Utils::Link CMakeEditorWidget::findLinkAt(const QTextCursor &cursor,
     // check if the current position is commented out
     const int hashPos = block.indexOf(QLatin1Char('#'));
     if (hashPos >= 0 && hashPos < positionInBlock)
-        return link;
+        return processLinkCallback(link);
 
     // find the beginning of a filename
     QString buffer;
@@ -177,7 +182,7 @@ Utils::Link CMakeEditorWidget::findLinkAt(const QTextCursor &cursor,
     }
 
     if (buffer.isEmpty())
-        return link;
+        return processLinkCallback(link);
 
     // TODO: Resolve variables
 
@@ -191,13 +196,13 @@ Utils::Link CMakeEditorWidget::findLinkAt(const QTextCursor &cursor,
             if (QFileInfo::exists(subProject))
                 fileName = subProject;
             else
-                return link;
+                return processLinkCallback(link);
         }
         link.targetFileName = fileName;
         link.linkTextStart = cursor.position() - positionInBlock + beginPos + 1;
         link.linkTextEnd = cursor.position() - positionInBlock + endPos;
     }
-    return link;
+    processLinkCallback(link);
 }
 
 static TextDocument *createCMakeDocument()
diff --git a/src/plugins/cppeditor/cppeditorwidget.cpp b/src/plugins/cppeditor/cppeditorwidget.cpp
index 778936570e..b6032fee4a 100644
--- a/src/plugins/cppeditor/cppeditorwidget.cpp
+++ b/src/plugins/cppeditor/cppeditorwidget.cpp
@@ -718,21 +718,23 @@ void CppEditorWidget::switchDeclarationDefinition(bool inNextSplit)
         openLink(symbolLink, inNextSplit != alwaysOpenLinksInNextSplit());
 }
 
-Utils::Link CppEditorWidget::findLinkAt(const QTextCursor &cursor,
-                                        bool resolveTarget,
-                                        bool inNextSplit)
+void CppEditorWidget::findLinkAt(const QTextCursor &cursor,
+                                 Utils::ProcessLinkCallback &&processLinkCallback,
+                                 bool resolveTarget,
+                                 bool inNextSplit)
 {
     if (!d->m_modelManager)
-        return Utils::Link();
+        return processLinkCallback(Utils::Link());
 
     const Utils::FileName &filePath = textDocument()->filePath();
 
-    return followSymbolInterface().findLink(CppTools::CursorInEditor{cursor, filePath, this},
-                                            resolveTarget,
-                                            d->m_modelManager->snapshot(),
-                                            d->m_lastSemanticInfo.doc,
-                                            d->m_modelManager->symbolFinder(),
-                                            inNextSplit);
+    followSymbolInterface().findLink(CppTools::CursorInEditor{cursor, filePath, this},
+                                     std::move(processLinkCallback),
+                                     resolveTarget,
+                                     d->m_modelManager->snapshot(),
+                                     d->m_lastSemanticInfo.doc,
+                                     d->m_modelManager->symbolFinder(),
+                                     inNextSplit);
 }
 
 unsigned CppEditorWidget::documentRevision() const
diff --git a/src/plugins/cppeditor/cppeditorwidget.h b/src/plugins/cppeditor/cppeditorwidget.h
index 486c1ef474..d5538e63bf 100644
--- a/src/plugins/cppeditor/cppeditorwidget.h
+++ b/src/plugins/cppeditor/cppeditorwidget.h
@@ -100,8 +100,10 @@ protected:
     void keyPressEvent(QKeyEvent *e) override;
     bool handleStringSplitting(QKeyEvent *e) const;
 
-    Utils::Link findLinkAt(const QTextCursor &, bool resolveTarget = true,
-                           bool inNextSplit = false) override;
+    void findLinkAt(const QTextCursor &cursor,
+                    Utils::ProcessLinkCallback &&processLinkCallback,
+                    bool resolveTarget = true,
+                    bool inNextSplit = false) override;
 
     void onRefactorMarkerClicked(const TextEditor::RefactorMarker &marker) override;
 
diff --git a/src/plugins/cpptools/cppfollowsymbolundercursor.cpp b/src/plugins/cpptools/cppfollowsymbolundercursor.cpp
index 191746923e..304d938cd8 100644
--- a/src/plugins/cpptools/cppfollowsymbolundercursor.cpp
+++ b/src/plugins/cpptools/cppfollowsymbolundercursor.cpp
@@ -480,8 +480,9 @@ static int skipMatchingParentheses(const Tokens &tokens, int idx, int initialDep
     return j;
 }
 
-Link FollowSymbolUnderCursor::findLink(
+void FollowSymbolUnderCursor::findLink(
         const CppTools::CursorInEditor &data,
+        Utils::ProcessLinkCallback &&processLinkCallback,
         bool resolveTarget,
         const Snapshot &theSnapshot,
         const Document::Ptr &documentFromSemanticInfo,
@@ -518,7 +519,7 @@ Link FollowSymbolUnderCursor::findLink(
             link = attemptFuncDeclDef(cursor, snapshot, documentFromSemanticInfo,
                                       symbolFinder);
             if (link.hasValidLinkText())
-                return link;
+                return processLinkCallback(link);
         }
     }
 
@@ -590,7 +591,7 @@ Link FollowSymbolUnderCursor::findLink(
                     link = attemptFuncDeclDef(cursor, theSnapshot,
                                               documentFromSemanticInfo, symbolFinder);
                     if (link.hasValidLinkText())
-                        return link;
+                        return processLinkCallback(link);
                 } else if (tk.isOperator() && i > 0 && tokens.at(i - 1).is(T_OPERATOR)) {
                     QTextCursor c = cursor;
                     c.movePosition(QTextCursor::Left, QTextCursor::MoveAnchor,
@@ -598,7 +599,7 @@ Link FollowSymbolUnderCursor::findLink(
                     link = attemptFuncDeclDef(c, theSnapshot, documentFromSemanticInfo,
                                               symbolFinder);
                     if (link.hasValidLinkText())
-                        return link;
+                        return processLinkCallback(link);
                 }
             } else if (cursorRegionReached) {
                 break;
@@ -608,13 +609,14 @@ Link FollowSymbolUnderCursor::findLink(
 
     CppEditorWidgetInterface *editorWidget = data.editorWidget();
     if (!editorWidget)
-        return link;
+        return processLinkCallback(link);
+
     // Now we prefer the doc from the snapshot with macros expanded.
     Document::Ptr doc = snapshot.document(data.filePath());
     if (!doc) {
         doc = documentFromSemanticInfo;
         if (!doc)
-            return link;
+            return processLinkCallback(link);
     }
 
     if (!recognizedQtMethod) {
@@ -638,13 +640,14 @@ Link FollowSymbolUnderCursor::findLink(
                     link.targetFileName = incl.resolvedFileName();
                     link.linkTextStart = beginOfToken + 1;
                     link.linkTextEnd = endOfToken - 1;
-                    return link;
+                    processLinkCallback(link);
+                    return;
                 }
             }
         }
 
         if (tk.isNot(T_IDENTIFIER) && !tk.isQtKeyword())
-            return link;
+            return processLinkCallback(link);
 
         tc.setPosition(endOfToken);
     }
@@ -655,7 +658,7 @@ Link FollowSymbolUnderCursor::findLink(
         QTextCursor macroCursor = cursor;
         const QByteArray name = CppTools::identifierUnderCursor(&macroCursor).toUtf8();
         if (macro->name() == name)
-            return link;    //already on definition!
+            return processLinkCallback(link); //already on definition!
     } else if (const Document::MacroUse *use = doc->findMacroUseAt(endOfToken - 1)) {
         const QString fileName = use->macro().fileName();
         if (fileName == CppModelManager::editorConfigurationFileName()) {
@@ -667,13 +670,14 @@ Link FollowSymbolUnderCursor::findLink(
             link.linkTextStart = use->utf16charsBegin();
             link.linkTextEnd = use->utf16charsEnd();
         }
-        return link;
+        processLinkCallback(link);
+        return;
     }
 
     // Find the last symbol up to the cursor position
     Scope *scope = doc->scopeAt(line, column);
     if (!scope)
-        return link;
+        return processLinkCallback(link);
 
     // Evaluate the type of the expression under the cursor
     QTC_CHECK(document == tc.document());
@@ -741,7 +745,8 @@ Link FollowSymbolUnderCursor::findLink(
                     Link link;
                     link.linkTextStart = beginOfToken;
                     link.linkTextEnd = endOfToken;
-                    return link;
+                    processLinkCallback(link);
+                    return;
                 }
 
                 Symbol *lastVisibleSymbol = doc->lastVisibleSymbolAt(line, column);
@@ -765,7 +770,8 @@ Link FollowSymbolUnderCursor::findLink(
             link = (def ? def : symbol)->toLink();
             link.linkTextStart = beginOfToken;
             link.linkTextEnd = endOfToken;
-            return link;
+            processLinkCallback(link);
+            return;
         }
     }
 
@@ -776,10 +782,11 @@ Link FollowSymbolUnderCursor::findLink(
     if (link.hasValidTarget()) {
         link.linkTextStart = macroCursor.selectionStart();
         link.linkTextEnd = macroCursor.selectionEnd();
-        return link;
+        processLinkCallback(link);
+        return;
     }
 
-    return Link();
+    processLinkCallback(Link());
 }
 
 QSharedPointer<VirtualFunctionAssistProvider> FollowSymbolUnderCursor::virtualFunctionAssistProvider()
diff --git a/src/plugins/cpptools/cppfollowsymbolundercursor.h b/src/plugins/cpptools/cppfollowsymbolundercursor.h
index 8e93a7097d..a3bdf17736 100644
--- a/src/plugins/cpptools/cppfollowsymbolundercursor.h
+++ b/src/plugins/cpptools/cppfollowsymbolundercursor.h
@@ -36,7 +36,8 @@ class CPPTOOLS_EXPORT FollowSymbolUnderCursor : public CppTools::FollowSymbolInt
 public:
     FollowSymbolUnderCursor();
 
-    Link findLink(const CppTools::CursorInEditor &data,
+    void findLink(const CppTools::CursorInEditor &data,
+                  Utils::ProcessLinkCallback &&processLinkCallback,
                   bool resolveTarget,
                   const CPlusPlus::Snapshot &snapshot,
                   const CPlusPlus::Document::Ptr &documentFromSemanticInfo,
diff --git a/src/plugins/cpptools/cppmodelmanager.cpp b/src/plugins/cpptools/cppmodelmanager.cpp
index c28995c709..953b0eb06f 100644
--- a/src/plugins/cpptools/cppmodelmanager.cpp
+++ b/src/plugins/cpptools/cppmodelmanager.cpp
@@ -327,17 +327,18 @@ void CppModelManager::findUsages(const CppTools::CursorInEditor &data,
     engine->findUsages(data, std::move(showUsagesCallback));
 }
 
-CppModelManager::Link CppModelManager::globalFollowSymbol(
+void CppModelManager::globalFollowSymbol(
         const CursorInEditor &data,
+        Utils::ProcessLinkCallback &&processLinkCallback,
         const CPlusPlus::Snapshot &snapshot,
         const CPlusPlus::Document::Ptr &documentFromSemanticInfo,
         SymbolFinder *symbolFinder,
         bool inNextSplit) const
 {
     RefactoringEngineInterface *engine = getRefactoringEngine(d->m_refactoringEngines);
-    QTC_ASSERT(engine, return Link(););
-    return engine->globalFollowSymbol(data, snapshot, documentFromSemanticInfo,
-            symbolFinder, inNextSplit);
+    QTC_ASSERT(engine, return;);
+    engine->globalFollowSymbol(data, std::move(processLinkCallback), snapshot, documentFromSemanticInfo,
+                               symbolFinder, inNextSplit);
 }
 
 void CppModelManager::addRefactoringEngine(RefactoringEngineType type,
diff --git a/src/plugins/cpptools/cppmodelmanager.h b/src/plugins/cpptools/cppmodelmanager.h
index a472fa4924..f7a9d6ddd6 100644
--- a/src/plugins/cpptools/cppmodelmanager.h
+++ b/src/plugins/cpptools/cppmodelmanager.h
@@ -163,7 +163,8 @@ public:
                       const QString &replacement) final;
     void findUsages(const CppTools::CursorInEditor &data,
                     UsagesCallback &&showUsagesCallback) const final;
-    Link globalFollowSymbol(const CursorInEditor &data,
+    void globalFollowSymbol(const CursorInEditor &data,
+                            Utils::ProcessLinkCallback &&processLinkCallback,
                             const CPlusPlus::Snapshot &snapshot,
                             const CPlusPlus::Document::Ptr &documentFromSemanticInfo,
                             SymbolFinder *symbolFinder,
diff --git a/src/plugins/cpptools/cpprefactoringengine.cpp b/src/plugins/cpptools/cpprefactoringengine.cpp
index 1f66829e96..f816b507a5 100644
--- a/src/plugins/cpptools/cpprefactoringengine.cpp
+++ b/src/plugins/cpptools/cpprefactoringengine.cpp
@@ -100,16 +100,17 @@ void CppRefactoringEngine::findUsages(const CursorInEditor &data,
     }
 }
 
-CppRefactoringEngine::Link CppRefactoringEngine::globalFollowSymbol(
+void CppRefactoringEngine::globalFollowSymbol(
         const CursorInEditor &data,
+        Utils::ProcessLinkCallback &&processLinkCallback,
         const CPlusPlus::Snapshot &snapshot,
         const CPlusPlus::Document::Ptr &documentFromSemanticInfo,
         SymbolFinder *symbolFinder,
         bool inNextSplit) const
 {
     FollowSymbolUnderCursor followSymbol;
-    return followSymbol.findLink(data, true, snapshot, documentFromSemanticInfo,
-                                 symbolFinder, inNextSplit);
+    return followSymbol.findLink(data, std::move(processLinkCallback), true, snapshot,
+                                 documentFromSemanticInfo, symbolFinder, inNextSplit);
 }
 
 } // namespace CppEditor
diff --git a/src/plugins/cpptools/cpprefactoringengine.h b/src/plugins/cpptools/cpprefactoringengine.h
index 72a81136e3..17b24062f7 100644
--- a/src/plugins/cpptools/cpprefactoringengine.h
+++ b/src/plugins/cpptools/cpprefactoringengine.h
@@ -38,7 +38,8 @@ public:
     void globalRename(const CursorInEditor &data, UsagesCallback &&,
                       const QString &replacement) override;
     void findUsages(const CursorInEditor &data, UsagesCallback &&) const override;
-    Link globalFollowSymbol(const CursorInEditor &data,
+    void globalFollowSymbol(const CursorInEditor &data,
+                            Utils::ProcessLinkCallback &&processLinkCallback,
                             const CPlusPlus::Snapshot &snapshot,
                             const CPlusPlus::Document::Ptr &documentFromSemanticInfo,
                             SymbolFinder *symbolFinder,
diff --git a/src/plugins/cpptools/followsymbolinterface.h b/src/plugins/cpptools/followsymbolinterface.h
index 94dbfc9827..bde155c5f3 100644
--- a/src/plugins/cpptools/followsymbolinterface.h
+++ b/src/plugins/cpptools/followsymbolinterface.h
@@ -42,7 +42,8 @@ public:
     using Link = Utils::Link;
 
     virtual ~FollowSymbolInterface() {}
-    virtual Link findLink(const CursorInEditor &data,
+    virtual void findLink(const CursorInEditor &data,
+                          Utils::ProcessLinkCallback &&processLinkCallback,
                           bool resolveTarget,
                           const CPlusPlus::Snapshot &snapshot,
                           const CPlusPlus::Document::Ptr &documentFromSemanticInfo,
diff --git a/src/plugins/cpptools/refactoringengineinterface.h b/src/plugins/cpptools/refactoringengineinterface.h
index fa9435bf77..d47855b686 100644
--- a/src/plugins/cpptools/refactoringengineinterface.h
+++ b/src/plugins/cpptools/refactoringengineinterface.h
@@ -69,7 +69,8 @@ public:
                               const QString &replacement) = 0;
     virtual void findUsages(const CppTools::CursorInEditor &data,
                             UsagesCallback &&showUsagesCallback) const = 0;
-    virtual Link globalFollowSymbol(const CursorInEditor &data,
+    virtual void globalFollowSymbol(const CursorInEditor &data,
+                                    Utils::ProcessLinkCallback &&processLinkCallback,
                                     const CPlusPlus::Snapshot &snapshot,
                                     const CPlusPlus::Document::Ptr &documentFromSemanticInfo,
                                     SymbolFinder *symbolFinder,
diff --git a/src/plugins/qmakeprojectmanager/profileeditor.cpp b/src/plugins/qmakeprojectmanager/profileeditor.cpp
index 49b1f3993b..cccb3ba98b 100644
--- a/src/plugins/qmakeprojectmanager/profileeditor.cpp
+++ b/src/plugins/qmakeprojectmanager/profileeditor.cpp
@@ -57,7 +57,9 @@ namespace Internal {
 class ProFileEditorWidget : public TextEditorWidget
 {
 protected:
-    virtual Link findLinkAt(const QTextCursor &, bool resolveTarget = true,
+    virtual void findLinkAt(const QTextCursor &,
+                            Utils::ProcessLinkCallback &&processLinkCallback,
+                            bool resolveTarget = true,
                             bool inNextSplit = false) override;
     void contextMenuEvent(QContextMenuEvent *) override;
 };
@@ -72,9 +74,10 @@ static bool isValidFileNameChar(const QChar &c)
             || c == QLatin1Char('\\');
 }
 
-Utils::Link ProFileEditorWidget::findLinkAt(const QTextCursor &cursor,
-                                            bool /*resolveTarget*/,
-                                            bool /*inNextSplit*/)
+void ProFileEditorWidget::findLinkAt(const QTextCursor &cursor,
+                                     Utils::ProcessLinkCallback &&processLinkCallback,
+                                     bool /*resolveTarget*/,
+                                     bool /*inNextSplit*/)
 {
     Link link;
 
@@ -86,7 +89,7 @@ Utils::Link ProFileEditorWidget::findLinkAt(const QTextCursor &cursor,
     // check if the current position is commented out
     const int hashPos = block.indexOf(QLatin1Char('#'));
     if (hashPos >= 0 && hashPos < positionInBlock)
-        return link;
+        return processLinkCallback(link);
 
     // find the beginning of a filename
     QString buffer;
@@ -159,7 +162,7 @@ Utils::Link ProFileEditorWidget::findLinkAt(const QTextCursor &cursor,
     }
 
     if (buffer.isEmpty())
-        return link;
+        return processLinkCallback(link);
 
     // remove trailing '\' since it can be line continuation char
     if (buffer.at(buffer.size() - 1) == QLatin1Char('\\')) {
@@ -181,13 +184,13 @@ Utils::Link ProFileEditorWidget::findLinkAt(const QTextCursor &cursor,
             if (QFileInfo::exists(subProject))
                 fileName = subProject;
             else
-                return link;
+                return processLinkCallback(link);
         }
         link.targetFileName = QDir::cleanPath(fileName);
         link.linkTextStart = cursor.position() - positionInBlock + beginPos + 1;
         link.linkTextEnd = cursor.position() - positionInBlock + endPos;
     }
-    return link;
+    processLinkCallback(link);
 }
 
 void ProFileEditorWidget::contextMenuEvent(QContextMenuEvent *e)
diff --git a/src/plugins/qmljseditor/qmljseditor.cpp b/src/plugins/qmljseditor/qmljseditor.cpp
index b2628c0783..1cc059c046 100644
--- a/src/plugins/qmljseditor/qmljseditor.cpp
+++ b/src/plugins/qmljseditor/qmljseditor.cpp
@@ -712,18 +712,19 @@ void QmlJSEditorWidget::inspectElementUnderCursor() const
     widget->textDocument()->setPlainText(buf);
 }
 
-Utils::Link QmlJSEditorWidget::findLinkAt(const QTextCursor &cursor,
-                                          bool /*resolveTarget*/,
-                                          bool /*inNextSplit*/)
+void QmlJSEditorWidget::findLinkAt(const QTextCursor &cursor,
+                                   Utils::ProcessLinkCallback &&processLinkCallback,
+                                   bool /*resolveTarget*/,
+                                   bool /*inNextSplit*/)
 {
     const SemanticInfo semanticInfo = m_qmlJsEditorDocument->semanticInfo();
     if (! semanticInfo.isValid())
-        return Utils::Link();
+        return processLinkCallback(Utils::Link());
 
     const unsigned cursorPosition = cursor.position();
 
     AST::Node *node = semanticInfo.astNodeAt(cursorPosition);
-    QTC_ASSERT(node, return Utils::Link());
+    QTC_ASSERT(node, return;);
 
     if (AST::UiImport *importAst = cast<AST::UiImport *>(node)) {
         // if it's a file import, link to the file
@@ -732,10 +733,12 @@ Utils::Link QmlJSEditorWidget::findLinkAt(const QTextCursor &cursor,
                 Utils::Link link(import.path());
                 link.linkTextStart = importAst->firstSourceLocation().begin();
                 link.linkTextEnd = importAst->lastSourceLocation().end();
-                return link;
+                processLinkCallback(Utils::Link());
+                return;
             }
         }
-        return Utils::Link();
+        processLinkCallback(Utils::Link());
+        return;
     }
 
     // string literals that could refer to a file link to them
@@ -746,14 +749,16 @@ Utils::Link QmlJSEditorWidget::findLinkAt(const QTextCursor &cursor,
         link.linkTextEnd = literal->literalToken.end();
         if (semanticInfo.snapshot.document(text)) {
             link.targetFileName = text;
-            return link;
+            processLinkCallback(link);
+            return;
         }
         const QString relative = QString::fromLatin1("%1/%2").arg(
                     semanticInfo.document->path(),
                     text);
         if (semanticInfo.snapshot.document(relative)) {
             link.targetFileName = relative;
-            return link;
+            processLinkCallback(link);
+            return;
         }
     }
 
@@ -765,7 +770,7 @@ Utils::Link QmlJSEditorWidget::findLinkAt(const QTextCursor &cursor,
     int line = 0, column = 0;
 
     if (! (value && value->getSourceLocation(&fileName, &line, &column)))
-        return Utils::Link();
+        return processLinkCallback(Utils::Link());
 
     Utils::Link link;
     link.targetFileName = fileName;
@@ -777,22 +782,25 @@ Utils::Link QmlJSEditorWidget::findLinkAt(const QTextCursor &cursor,
             if (! tail->next && cursorPosition <= tail->identifierToken.end()) {
                 link.linkTextStart = tail->identifierToken.begin();
                 link.linkTextEnd = tail->identifierToken.end();
-                return link;
+                processLinkCallback(link);
+                return;
             }
         }
 
     } else if (AST::IdentifierExpression *id = AST::cast<AST::IdentifierExpression *>(node)) {
         link.linkTextStart = id->firstSourceLocation().begin();
         link.linkTextEnd = id->lastSourceLocation().end();
-        return link;
+        processLinkCallback(link);
+        return;
 
     } else if (AST::FieldMemberExpression *mem = AST::cast<AST::FieldMemberExpression *>(node)) {
         link.linkTextStart = mem->lastSourceLocation().begin();
         link.linkTextEnd = mem->lastSourceLocation().end();
-        return link;
+        processLinkCallback(link);
+        return;
     }
 
-    return Utils::Link();
+    processLinkCallback(Utils::Link());
 }
 
 void QmlJSEditorWidget::findUsages()
diff --git a/src/plugins/qmljseditor/qmljseditor.h b/src/plugins/qmljseditor/qmljseditor.h
index f857acc8be..1b2767d43e 100644
--- a/src/plugins/qmljseditor/qmljseditor.h
+++ b/src/plugins/qmljseditor/qmljseditor.h
@@ -103,9 +103,10 @@ protected:
     void scrollContentsBy(int dx, int dy) override;
     void applyFontSettings() override;
     void createToolBar();
-    Utils::Link findLinkAt(const QTextCursor &cursor,
-                           bool resolveTarget = true,
-                           bool inNextSplit = false) override;
+    void findLinkAt(const QTextCursor &cursor,
+                    Utils::ProcessLinkCallback &&processLinkCallback,
+                    bool resolveTarget = true,
+                    bool inNextSplit = false) override;
     QString foldReplacementText(const QTextBlock &block) const override;
     void onRefactorMarkerClicked(const TextEditor::RefactorMarker &marker) override;
 
diff --git a/src/plugins/texteditor/texteditor.cpp b/src/plugins/texteditor/texteditor.cpp
index f36f208376..916f738f12 100644
--- a/src/plugins/texteditor/texteditor.cpp
+++ b/src/plugins/texteditor/texteditor.cpp
@@ -1847,15 +1847,21 @@ void TextEditorWidget::redo()
 void TextEditorWidget::openLinkUnderCursor()
 {
     const bool openInNextSplit = alwaysOpenLinksInNextSplit();
-    Utils::Link symbolLink = findLinkAt(textCursor(), true, openInNextSplit);
-    openLink(symbolLink, openInNextSplit);
+    findLinkAt(textCursor(),
+               [openInNextSplit, self = QPointer<TextEditorWidget>(this)](const Link &symbolLink) {
+        if (self)
+            self->openLink(symbolLink, openInNextSplit);
+    }, true, openInNextSplit);
 }
 
 void TextEditorWidget::openLinkUnderCursorInNextSplit()
 {
     const bool openInNextSplit = !alwaysOpenLinksInNextSplit();
-    Utils::Link symbolLink = findLinkAt(textCursor(), true, openInNextSplit);
-    openLink(symbolLink, openInNextSplit);
+    findLinkAt(textCursor(),
+               [openInNextSplit, self = QPointer<TextEditorWidget>(this)](const Link &symbolLink) {
+        if (self)
+            self->openLink(symbolLink, openInNextSplit);
+    }, true, openInNextSplit);
 }
 
 void TextEditorWidget::abortAssist()
@@ -5581,10 +5587,12 @@ void TextEditorWidget::mouseReleaseEvent(QMouseEvent *e)
         EditorManager::addCurrentPositionToNavigationHistory();
         bool inNextSplit = ((e->modifiers() & Qt::AltModifier) && !alwaysOpenLinksInNextSplit())
                 || (alwaysOpenLinksInNextSplit() && !(e->modifiers() & Qt::AltModifier));
-        if (openLink(findLinkAt(cursorForPosition(e->pos())), inNextSplit)) {
-            d->clearLink();
-            return;
-        }
+
+        findLinkAt(textCursor(),
+                   [inNextSplit, self = QPointer<TextEditorWidget>(this)](const Link &symbolLink) {
+            if (self && self->openLink(symbolLink, inNextSplit))
+                self->d->clearLink();
+        }, true, inNextSplit);
     }
 
     if (!HostOsInfo::isLinuxHost() && handleForwardBackwardMouseButtons(e))
@@ -6136,9 +6144,8 @@ void TextEditorWidget::zoomReset()
     showZoomIndicator(this, 100);
 }
 
-Utils::Link TextEditorWidget::findLinkAt(const QTextCursor &, bool, bool)
+void TextEditorWidget::findLinkAt(const QTextCursor &, Utils::ProcessLinkCallback &&, bool, bool)
 {
-    return Utils::Link();
 }
 
 bool TextEditorWidget::openLink(const Utils::Link &link, bool inNextSplit)
@@ -6204,11 +6211,16 @@ void TextEditorWidgetPrivate::updateLink()
         return;
 
     m_lastLinkUpdate = m_pendingLinkUpdate;
-    const Utils::Link link = q->findLinkAt(m_pendingLinkUpdate, false);
-    if (link.hasValidLinkText())
-        showLink(link);
-    else
-        clearLink();
+    q->findLinkAt(m_pendingLinkUpdate,
+                  [parent = QPointer<TextEditorWidget>(q), this](const Link &link) {
+        if (!parent)
+            return;
+
+        if (link.hasValidLinkText())
+            showLink(link);
+        else
+            clearLink();
+    }, false);
 }
 
 void TextEditorWidgetPrivate::showLink(const Utils::Link &link)
diff --git a/src/plugins/texteditor/texteditor.h b/src/plugins/texteditor/texteditor.h
index c08187ed4d..937bff13d1 100644
--- a/src/plugins/texteditor/texteditor.h
+++ b/src/plugins/texteditor/texteditor.h
@@ -548,8 +548,10 @@ protected:
        \a resolveTarget is set to true when the target of the link is relevant
        (it isn't until the link is used).
      */
-    virtual Utils::Link findLinkAt(const QTextCursor &, bool resolveTarget = true,
-                                   bool inNextSplit = false);
+    virtual void findLinkAt(const QTextCursor &,
+                            Utils::ProcessLinkCallback &&processLinkCallback,
+                            bool resolveTarget = true,
+                            bool inNextSplit = false);
 
     /*!
        Returns whether the link was opened successfully.