Strip FX writes from the Design View mode switch; split view.cpp into park/lanes/reconcile/tracks and add the record-scoped undo repair pass

src/shell/view/view_tracks.cpp

@@ -0,0 +1,47 @@
+// See view_tracks.h. Compiled into the reaper_reasampler module; includes
+// reaper_plugin_functions.h without REAPERAPI_IMPLEMENT (main.cpp owns that).
+
+#include "shell/view/view_tracks.h"
+
+#include <string>
+
+#include "shell/capture/track_guid.h"
+
+#define REAPERAPI_MINIMAL
+#define REAPERAPI_WANT_CountTracks
+#define REAPERAPI_WANT_GetTrack
+#define REAPERAPI_WANT_GetMediaTrackInfo_Value
+#define REAPERAPI_WANT_PreventUIRefresh
+#include "reaper_plugin_functions.h"
+
+namespace reasampler {
+
+std::vector<view::TrackFolderEntry> readFolderEntries(ReaProject* proj,
+                                                      TrackHandles& handleByGuid) {
+    std::vector<view::TrackFolderEntry> entries;
+    const int count = CountTracks(proj);
+    entries.reserve(static_cast<std::size_t>(count));
+    handleByGuid.reserve(static_cast<std::size_t>(count));
+    for (int i = 0; i < count; ++i) {
+        MediaTrack* tr = GetTrack(proj, i);
+        if (!tr) continue;
+        std::string guid = guidString(tr);
+        if (guid.empty()) continue;
+        const int depth = static_cast<int>(GetMediaTrackInfo_Value(tr, "I_FOLDERDEPTH"));
+        entries.push_back(view::TrackFolderEntry{guid, depth});
+        handleByGuid.emplace_back(std::move(guid), tr);
+    }
+    return entries;
+}
+
+TrackByGuid indexHandles(const TrackHandles& handleByGuid) {
+    TrackByGuid byGuid;
+    byGuid.reserve(handleByGuid.size());
+    for (const auto& kv : handleByGuid) byGuid.emplace(kv.first, kv.second);
+    return byGuid;
+}
+
+UiRefreshHold::UiRefreshHold() { PreventUIRefresh(1); }
+UiRefreshHold::~UiRefreshHold() { PreventUIRefresh(-1); }
+
+}  // namespace reasampler