Start work on CardinalRemote, WIP

Signed-off-by: falkTX <falktx@falktx.com>

src/CardinalRemote/RemoteUI.cpp

@@ -0,0 +1,91 @@
+/*
+ * DISTRHO Cardinal Plugin
+ * Copyright (C) 2021-2022 Filipe Coelho <falktx@falktx.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 3 of
+ * the License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * For a full copy of the GNU General Public License see the LICENSE file.
+ */
+
+#include "RemoteUI.hpp"
+
+// #include <asset.hpp>
+// #include <random.hpp>
+#include <patch.hpp>
+#include <settings.hpp>
+#include <system.hpp>
+
+#include <app/Scene.hpp>
+#include <engine/Engine.hpp>
+
+CardinalRemoteUI::CardinalRemoteUI(Window& window, const std::string& templatePath)
+    : NanoTopLevelWidget(window),
+      context(nullptr)
+{
+    // create unique temporary path for this instance
+    try {
+        char uidBuf[24];
+        const std::string tmp = rack::system::getTempDirectory();
+
+        for (int i=1;; ++i)
+        {
+            std::snprintf(uidBuf, sizeof(uidBuf), "CardinalRemote.%04d", i);
+            const std::string trypath = rack::system::join(tmp, uidBuf);
+
+            if (! rack::system::exists(trypath))
+            {
+                if (rack::system::createDirectories(trypath))
+                    autosavePath = trypath;
+                break;
+            }
+        }
+    } DISTRHO_SAFE_EXCEPTION("create unique temporary path");
+
+    rack::contextSet(&context);
+
+    context.bufferSize = 512;
+    rack::settings::sampleRate = context.sampleRate = 48000;
+
+    context.engine = new rack::engine::Engine;
+    context.engine->setSampleRate(context.sampleRate);
+
+    context.history = new rack::history::State;
+    context.patch = new rack::patch::Manager;
+    context.patch->autosavePath = autosavePath;
+    context.patch->templatePath = templatePath;
+
+    context.event = new rack::widget::EventState;
+    context.scene = new rack::app::Scene;
+    context.event->rootWidget = context.scene;
+    context.window = new rack::window::Window;
+
+    context.patch->loadTemplate();
+    context.scene->rackScroll->reset();
+
+    context.nativeWindowId = getWindow().getNativeWindowHandle();
+}
+
+CardinalRemoteUI::~CardinalRemoteUI()
+{
+    rack::contextSet(&context);
+
+    context.nativeWindowId = 0;
+    context.patch->clear();
+
+    if (! autosavePath.empty())
+        rack::system::removeRecursively(autosavePath);
+}
+
+void CardinalRemoteUI::onNanoDisplay()
+{
+    rack::contextSet(&context);
+    context.window->step();
+}