[refactor] reorganize platform and wire sources

apps/desktop/tests/cursor_position_test.cpp

@@ -0,0 +1,30 @@
+#include <iostream>
+#include <vector>
+
+#include <remote_action.h>
+
+#include "cursor_position.h"
+#include "display_info.h"
+
+namespace {
+
+bool Expect(bool condition, const char* message) {
+  if (condition) return true;
+  std::cerr << message << '\n';
+  return false;
+}
+
+}  // namespace
+
+int main() {
+  const std::vector<crossdesk::DisplayInfo> displays = {
+      crossdesk::DisplayInfo("Test Display", 0, 0, 1920, 1080)};
+  crossdesk::CursorState normalized_cursor{};
+  const bool ok = Expect(
+      crossdesk::NormalizeCursorPosition(960.0, 540.0, displays, 0,
+                                         &normalized_cursor) &&
+          normalized_cursor.position_valid &&
+          normalized_cursor.x == 0.5f && normalized_cursor.y == 0.5f,
+      "cursor position should use continuous display extents");
+  return ok ? 0 : 1;
+}