1 files changed, 72 insertions, 0 deletions
diff --git a/src/qmlls/qqmllintsuggestions_p.h b/src/qmlls/qqmllintsuggestions_p.h
new file mode 100644
index 0000000000..28ab3ccb5d
--- /dev/null
+++ b/src/qmlls/qqmllintsuggestions_p.h
@@ -0,0 +1,72 @@
+// Copyright (C) 2021 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#ifndef QMLLINTSUGGESTIONS_P_H
+#define QMLLINTSUGGESTIONS_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "qlanguageserver_p.h"
+#include "qqmlcodemodel_p.h"
+
+#include <chrono>
+#include <optional>
+
+QT_BEGIN_NAMESPACE
+namespace QmlLsp {
+struct LastLintUpdate
+{
+    std::optional<int> version;
+    std::optional<std::chrono::steady_clock::time_point> invalidUpdatesSince;
+};
+
+class QmlLintSuggestions : public QLanguageServerModule
+{
+    Q_OBJECT
+public:
+    QmlLintSuggestions(QLanguageServer *server, QmlLsp::QQmlCodeModel *codeModel);
+
+    QString name() const override { return QLatin1StringView("QmlLint Suggestions"); }
+public Q_SLOTS:
+    void diagnose(const QByteArray &uri);
+    void registerHandlers(QLanguageServer *server, QLanguageServerProtocol *protocol) override;
+    void setupCapabilities(const QLspSpecification::InitializeParams &clientInfo,
+                           QLspSpecification::InitializeResult &) override;
+
+private:
+    struct VersionedDocument
+    {
+        std::optional<int> version;
+        QQmlJS::Dom::DomItem item;
+    };
+    struct TryAgainLater
+    {
+        std::chrono::milliseconds time;
+    };
+    struct NoDocumentAvailable
+    {
+    };
+
+    using VersionToDiagnose = std::variant<VersionedDocument, TryAgainLater, NoDocumentAvailable>;
+
+    VersionToDiagnose chooseVersionToDiagnose(const QByteArray &url);
+    VersionToDiagnose chooseVersionToDiagnoseHelper(const QByteArray &url);
+    void diagnoseHelper(const QByteArray &uri, const VersionedDocument &document);
+
+    QMutex m_mutex;
+    QHash<QByteArray, LastLintUpdate> m_lastUpdate;
+    QLanguageServer *m_server;
+    QmlLsp::QQmlCodeModel *m_codeModel;
+};
+} // namespace QmlLsp
+QT_END_NAMESPACE
+#endif // QMLLINTSUGGESTIONS_P_H