ClangTools: Add automatic clang tool runner for open documents

Fixes: QTCREATORBUG-23349
Change-Id: I81197180c9d69c7df6184f8fcbf05f2256eaf7f6
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>
Reviewed-by: Christian Stenger <christian.stenger@qt.io>
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>

src/plugins/clangtools/clangtoolsplugin.cpp

@@ -29,6 +29,7 @@
 #include "clangtoolsconstants.h"
 #include "clangtoolsprojectsettings.h"
 #include "clangtoolsprojectsettingswidget.h"
+#include "documentclangtoolrunner.h"
 #include "settingswidget.h"
 
 #ifdef WITH_TESTS
@@ -84,6 +85,7 @@ class ClangToolsPluginPrivate
 public:
     ClangTool clangTool;
     ClangToolsOptionsPage optionsPage;
+    QMap<Core::IDocument *, DocumentClangToolRunner *> documentRunners;
 };
 
 ClangToolsPlugin::~ClangToolsPlugin()
@@ -111,9 +113,28 @@ bool ClangToolsPlugin::initialize(const QStringList &arguments, QString *errorSt
     panelFactory->setCreateWidgetFunction([](Project *project) { return new ProjectSettingsWidget(project); });
     ProjectPanelFactory::registerFactory(panelFactory);
 
+    connect(Core::EditorManager::instance(),
+            &Core::EditorManager::currentEditorChanged,
+            this,
+            &ClangToolsPlugin::onCurrentEditorChanged);
+
     return true;
 }
 
+void ClangToolsPlugin::onCurrentEditorChanged()
+{
+    for (Core::IEditor *editor : Core::EditorManager::visibleEditors()) {
+        IDocument *document = editor->document();
+        if (d->documentRunners.contains(document))
+            continue;
+        auto runner = new DocumentClangToolRunner(document);
+        connect(runner, &DocumentClangToolRunner::destroyed, this, [this, document]() {
+            d->documentRunners.remove(document);
+        });
+        d->documentRunners[document] = runner;
+    }
+}
+
 void ClangToolsPlugin::registerAnalyzeActions()
 {
     ActionManager::registerAction(d->clangTool.startAction(), Constants::RUN_ON_PROJECT);