1 files changed, 82 insertions, 0 deletions
diff --git a/src/qmlls/qqmlhover.cpp b/src/qmlls/qqmlhover.cpp
new file mode 100644
index 0000000000..d2acd7b5d9
--- /dev/null
+++ b/src/qmlls/qqmlhover.cpp
@@ -0,0 +1,82 @@
+// Copyright (C) 2024 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
+
+#include "qqmlhover_p.h"
+#include <QtQmlLS/private/qqmllshelputils_p.h>
+
+QT_BEGIN_NAMESPACE
+
+Q_LOGGING_CATEGORY(hoverLog, "qt.languageserver.hover")
+
+QQmlHover::QQmlHover(QmlLsp::QQmlCodeModel *codeModel)
+    : QQmlBaseModule(codeModel), m_helpManager(std::make_unique<HelpManager>())
+{
+    // if set thorugh the commandline
+    if (!codeModel->documentationRootPath().isEmpty())
+        m_helpManager->setDocumentationRootPath(codeModel->documentationRootPath());
+
+    connect(codeModel, &QmlLsp::QQmlCodeModel::documentationRootPathChanged, this, [this](const QString &path) {
+        m_helpManager->setDocumentationRootPath(path);
+    });
+}
+
+QQmlHover::~QQmlHover() = default;
+
+QString QQmlHover::name() const
+{
+    return u"QQmlHover"_s;
+}
+
+void QQmlHover::registerHandlers(QLanguageServer *, QLanguageServerProtocol *protocol)
+{
+    protocol->registerHoverRequestHandler(getRequestHandler());
+}
+
+void QQmlHover::setupCapabilities(
+        const QLspSpecification::InitializeParams &,
+        QLspSpecification::InitializeResult &serverCapabilities)
+{
+    serverCapabilities.capabilities.hoverProvider = true;
+}
+
+void QQmlHover::process(RequestPointerArgument request)
+{
+    if (!m_helpManager) {
+        qCWarning(hoverLog)
+                << "No help manager is available, documentation hints will not function!";
+        return;
+    }
+    using namespace QQmlJS::Dom;
+    QLspSpecification::Hover result;
+    ResponseScopeGuard guard(result, request->m_response);
+    if (!request) {
+        qCWarning(hoverLog) << "No hover information is available!";
+        return;
+    }
+    const auto textDocument = request->m_parameters.textDocument;
+    const auto position = request->m_parameters.position;
+    const auto doc = m_codeModel->openDocumentByUrl(QQmlLSUtils::lspUriToQmlUrl(textDocument.uri));
+    DomItem file = doc.snapshot.doc.fileObject(GoTo::MostLikely);
+    if (!file) {
+        guard.setError(QQmlLSUtils::ErrorMessage{
+                0, u"Could not find the file %1"_s.arg(doc.snapshot.doc.canonicalFilePath()) });
+        return;
+    }
+
+    const auto documentation = m_helpManager->documentationForItem(file, position);
+    if (!documentation.has_value()) {
+        qCDebug(hoverLog)
+                << QStringLiteral(
+                           "No documentation hints found for the item at (line, col): (%1,%2)")
+                           .arg(position.line)
+                           .arg(position.character);
+        return;
+    }
+    QLspSpecification::MarkupContent content;
+    // TODO: We need to do post-formatting what we fetch from documentation.
+    content.kind = QLspSpecification::MarkupKind::Markdown;
+    content.value = documentation.value();
+    result.contents = std::move(content);
+}
+
+QT_END_NAMESPACE