lspclient: send didSave notification if so requested

addons/lspclient/lspclientserver.cpp

@@ -1255,7 +1255,8 @@ private:
                                             {QStringLiteral("documentSymbol"), QJsonObject{{QStringLiteral("hierarchicalDocumentSymbolSupport"), true}} },
                                             {QStringLiteral("publishDiagnostics"), QJsonObject{{QStringLiteral("relatedInformation"), true}}},
                                             {QStringLiteral("codeAction"), codeAction},
-                                            {QStringLiteral("semanticTokens"), semanticTokens}
+                                            {QStringLiteral("semanticTokens"), semanticTokens},
+                                            {QStringLiteral("synchronization"), QJsonObject{{QStringLiteral("didSave"), true}}},
                                         },
                                   },
                                   {QStringLiteral("window"),
@@ -1475,7 +1476,9 @@ public:
     void didSave(const QUrl &document, const QString &text)
     {
         auto params = textDocumentParams(document);
-        params[QStringLiteral("text")] = text;
+        if (!text.isNull()) {
+            params[QStringLiteral("text")] = text;
+        }
         send(init_request(QStringLiteral("textDocument/didSave"), params));
     }
 

addons/lspclient/lspclientservermanager.cpp

@@ -833,6 +833,7 @@ private:
             connect(doc, &KTextEditor::Document::aboutToClose, this, &self_type::untrack, Qt::UniqueConnection);
             connect(doc, &KTextEditor::Document::destroyed, this, &self_type::untrack, Qt::UniqueConnection);
             connect(doc, &KTextEditor::Document::textChanged, this, &self_type::onTextChanged, Qt::UniqueConnection);
+            connect(doc, &KTextEditor::Document::documentSavedOrUploaded, this, &self_type::onDocumentSaved, Qt::UniqueConnection);
             // in case of incremental change
             connect(doc, &KTextEditor::Document::textInserted, this, &self_type::onTextInserted, Qt::UniqueConnection);
             connect(doc, &KTextEditor::Document::textRemoved, this, &self_type::onTextRemoved, Qt::UniqueConnection);
@@ -976,6 +977,20 @@ private:
         }
     }
 
+    void onDocumentSaved(KTextEditor::Document *doc, bool saveAs)
+    {
+        if (!saveAs) {
+            auto it = m_docs.find(doc);
+            if (it != m_docs.end() && it->server) {
+                auto server = it->server;
+                const auto &saveOptions = server->capabilities().textDocumentSync.save;
+                if (saveOptions) {
+                    server->didSave(doc->url(), saveOptions->includeText ? doc->text() : QString());
+                }
+            }
+        }
+    }
+
     void onMessage(bool isLog, const LSPLogMessageParams &params)
     {
         // determine server description