JLS: add special java client that can execute jls commands

the java language server uses special "java.apply.workspaceEdit"
commands that already contain the workspace edit that should be applied
when triggering the command.

Change-Id: If7c53b9b097aaeca289e3958a39be37a9725d395
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/android/CMakeLists.txt

@@ -1,5 +1,5 @@
 add_qtc_plugin(Android
-  DEPENDS QtcSsh QmlDebug Qt5::Xml
+  DEPENDS QtcSsh QmlDebug Qt5::Xml LanguageServerProtocol
   PLUGIN_DEPENDS Core Debugger ProjectExplorer QtSupport LanguageClient
   SOURCES
     adbcommandswidget.cpp adbcommandswidget.h adbcommandswidget.ui

src/plugins/android/android.qbs

@@ -8,6 +8,7 @@ Project {
         Depends { name: "Core" }
         Depends { name: "Debugger" }
         Depends { name: "LanguageClient" }
+        Depends { name: "LanguageServerProtocol" }
         Depends { name: "ProParser" }
         Depends { name: "ProjectExplorer" }
         Depends { name: "QmlDebug" }

src/plugins/android/android_dependencies.pri

@@ -9,6 +9,7 @@ QTC_PLUGIN_DEPENDS += \
 
 QTC_LIB_DEPENDS += \
     extensionsystem \
+    languageserverprotocol \
     qmldebug \
     ssh \
     utils

src/plugins/android/javalanguageserver.cpp

@@ -27,6 +27,8 @@
 
 #include "androidconstants.h"
 
+#include <languageclient/client.h>
+#include <languageclient/languageclientutils.h>
 #include <utils/environment.h>
 #include <utils/pathchooser.h>
 #include <utils/variablechooser.h>
@@ -180,5 +182,34 @@ LanguageClient::BaseSettings *JLSSettings::copy() const
     return new JLSSettings(*this);
 }
 
+class JLSClient : public LanguageClient::Client
+{
+public:
+    using Client::Client;
+
+    void executeCommand(const LanguageServerProtocol::Command &command) override;
+};
+
+void JLSClient::executeCommand(const LanguageServerProtocol::Command &command)
+{
+    if (command.command() == "java.apply.workspaceEdit") {
+        const QJsonArray arguments = command.arguments().value_or(QJsonArray());
+        for (const QJsonValue &argument : arguments) {
+            if (!argument.isObject())
+                continue;
+            LanguageServerProtocol::WorkspaceEdit edit(argument.toObject());
+            if (edit.isValid(nullptr))
+                LanguageClient::applyWorkspaceEdit(edit);
+        }
+    } else {
+        Client::executeCommand(command);
+    }
+}
+
+LanguageClient::Client *JLSSettings::createClient(LanguageClient::BaseClientInterface *interface) const
+{
+    return new JLSClient(interface);
+}
+
 } // namespace Internal
 } // namespace Android

src/plugins/android/javalanguageserver.h

@@ -41,6 +41,7 @@ public:
     QVariantMap toMap() const final;
     void fromMap(const QVariantMap &map) final;
     LanguageClient::BaseSettings *copy() const final;
+    LanguageClient::Client *createClient(LanguageClient::BaseClientInterface *interface) const final;
 
     QString m_languageServer;
     QString m_workspace;