Impl cursor on sdl.

1 files changed, 48 insertions, 0 deletions

diff --git a/src/platform/gui/sdl/Cursor.cpp b/src/platform/gui/sdl/Cursor.cpp
new file mode 100644
index 00000000..901c2bff
--- /dev/null
+++ b/src/platform/gui/sdl/Cursor.cpp
@@ -0,0 +1,48 @@
+#include "cru/platform/gui/sdl/Cursor.h"
+#include "cru/base/Base.h"
+#include "cru/platform/gui/Cursor.h"
+#include "cru/platform/gui/sdl/Base.h"
+
+#include <memory>
+
+namespace cru::platform::gui::sdl {
+std::shared_ptr<SdlCursor> SdlCursor::CreateSystem(SDL_SystemCursor cursor) {
+  auto c = SDL_CreateSystemCursor(cursor);
+  if (!c) {
+    throw SdlException("Failed to create system cursor.");
+  }
+  return std::make_shared<SdlCursor>(c, true);
+}
+
+SdlCursor::SdlCursor(SDL_Cursor* cursor, bool auto_destroy)
+    : cursor_(cursor), auto_destroy_(auto_destroy) {}
+
+SdlCursor::~SdlCursor() {
+  if (auto_destroy_) {
+    SDL_DestroyCursor(cursor_);
+  }
+}
+
+SDL_Cursor* SdlCursor::GetSdlCursor() { return cursor_; }
+
+SdlCursorManager::SdlCursorManager() {
+  arrow_cursor_ = SdlCursor::CreateSystem(SDL_SYSTEM_CURSOR_DEFAULT);
+  hand_cursor_ = SdlCursor::CreateSystem(SDL_SYSTEM_CURSOR_POINTER);
+  ibeam_cursor_ = SdlCursor::CreateSystem(SDL_SYSTEM_CURSOR_TEXT);
+}
+
+std::shared_ptr<ICursor> SdlCursorManager::GetSystemCursor(
+    SystemCursorType type) {
+  switch (type) {
+    case SystemCursorType::Arrow:
+      return std::static_pointer_cast<ICursor>(arrow_cursor_);
+    case SystemCursorType::Hand:
+      return std::static_pointer_cast<ICursor>(hand_cursor_);
+    case SystemCursorType::IBeam:
+      return std::static_pointer_cast<ICursor>(ibeam_cursor_);
+    default:
+      UnreachableCode();
+  }
+}
+
+}  // namespace cru::platform::gui::sdl