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1 files changed, 36 insertions, 0 deletions

diff --git a/src/ui/render/LayoutHelper.cpp b/src/ui/render/LayoutHelper.cpp
new file mode 100644
index 00000000..31cf5c08
--- /dev/null
+++ b/src/ui/render/LayoutHelper.cpp
@@ -0,0 +1,36 @@
+#include "cru/ui/render/LayoutHelper.hpp"
+
+#include "cru/common/Logger.hpp"
+
+namespace cru::ui::render {
+float CalculateAnchorByAlignment(Alignment alignment, float start_point,
+                                 float content_length, float child_length) {
+  switch (alignment) {
+    case FlexCrossAlignment::Start:
+      return start_point;
+    case FlexCrossAlignment::Center:
+      return start_point + (content_length - child_length) / 2.0f;
+    case FlexCrossAlignment::End:
+      return start_point + content_length - child_length;
+    default:
+      return start_point;
+  }
+}
+
+MeasureLength StackLayoutCalculateChildMaxLength(
+    MeasureLength parent_preferred_size, MeasureLength parent_max_size,
+    MeasureLength child_min_size, std::string_view exceeds_message) {
+  if (parent_max_size.GetLengthOrMax() < child_min_size.GetLengthOr0()) {
+    log::Warn(exceeds_message);
+    return parent_max_size;
+  }
+
+  if (parent_preferred_size.IsSpecified() &&
+      parent_preferred_size.GetLengthOrUndefined() >=
+          child_min_size.GetLengthOr0()) {
+    return parent_preferred_size;
+  } else {
+    return parent_max_size;
+  }
+}
+}  // namespace cru::ui::render