[refactor] reorganize platform and wire sources

apps/desktop/src/common/shared_cursor_state.cpp

@@ -0,0 +1,44 @@
+#include "shared_cursor_state.h"
+
+#include <remote_action.h>
+
+#include <mutex>
+
+namespace crossdesk {
+namespace {
+
+std::mutex g_cursor_state_mutex;
+SharedCursorState g_cursor_state;
+bool g_cursor_state_available = false;
+
+}  // namespace
+
+void PublishSharedCursorState(bool visible, RemoteCursorShape shape) {
+  std::lock_guard<std::mutex> lock(g_cursor_state_mutex);
+  ++g_cursor_state.generation;
+  g_cursor_state.visible = visible;
+  g_cursor_state.shape = visible ? shape : RemoteCursorShape::none;
+  g_cursor_state_available = true;
+}
+
+bool GetSharedCursorState(SharedCursorState* state) {
+  if (!state) {
+    return false;
+  }
+  std::lock_guard<std::mutex> lock(g_cursor_state_mutex);
+  if (!g_cursor_state_available) {
+    return false;
+  }
+  *state = g_cursor_state;
+  return true;
+}
+
+void ClearSharedCursorState() {
+  std::lock_guard<std::mutex> lock(g_cursor_state_mutex);
+  ++g_cursor_state.generation;
+  g_cursor_state.visible = false;
+  g_cursor_state.shape = RemoteCursorShape::none;
+  g_cursor_state_available = false;
+}
+
+}  // namespace crossdesk