...

3 files changed, 115 insertions, 0 deletions

diff --git a/include/cru/ui/render/TreeRenderObject.h b/include/cru/ui/render/TreeRenderObject.h
new file mode 100644
index 00000000..203474db
--- /dev/null
+++ b/include/cru/ui/render/TreeRenderObject.h
@@ -0,0 +1,66 @@
+#pragma once
+#include "RenderObject.h"
+
+namespace cru::ui::render {
+class TreeRenderObject;
+
+class CRU_UI_API TreeRenderObjectItem : public Object {
+  friend TreeRenderObject;
+
+ private:
+  explicit TreeRenderObjectItem(TreeRenderObject* tree_render_object,
+                                TreeRenderObjectItem* parent);
+
+ public:
+  CRU_DELETE_COPY(TreeRenderObjectItem)
+  CRU_DELETE_MOVE(TreeRenderObjectItem)
+  ~TreeRenderObjectItem() override;
+
+  RenderObject* GetRenderObject() { return render_object_; }
+  void SetRenderObject(RenderObject* render_object);
+
+  const std::vector<TreeRenderObjectItem*>& GetChildren() const {
+    return children_;
+  }
+
+  Index GetChildCount() const { return children_.size(); }
+
+  TreeRenderObjectItem* GetChild(Index index) {
+    Expects(index >= 0 && index < children_.size());
+    return children_[index];
+  }
+
+  TreeRenderObjectItem* AddItem(Index position);
+  void RemoveItem(Index position);
+
+ private:
+  TreeRenderObject* tree_render_object_;
+
+  TreeRenderObjectItem* parent_;
+  std::vector<TreeRenderObjectItem*> children_;
+
+  RenderObject* render_object_;
+};
+
+class CRU_UI_API TreeRenderObject : public RenderObject {
+  CRU_DEFINE_CLASS_LOG_TAG(u"cru::ui::render:TreeRenderObject")
+
+ public:
+  TreeRenderObject();
+  CRU_DELETE_COPY(TreeRenderObject)
+  CRU_DELETE_MOVE(TreeRenderObject)
+  ~TreeRenderObject() override;
+
+  std::u16string_view GetName() const override { return u"TreeRenderObject"; }
+
+  TreeRenderObjectItem* GetRootItem() { return root_item_; }
+
+ protected:
+  Size OnMeasureContent(const MeasureRequirement& requirement,
+                        const MeasureSize& preferred_size) override;
+  void OnLayoutContent(const Rect& content_rect) override;
+
+ private:
+  TreeRenderObjectItem* root_item_;
+};
+}  // namespace cru::ui::render
diff --git a/src/ui/CMakeLists.txt b/src/ui/CMakeLists.txt
index 88603f48..fd15e433 100644
--- a/src/ui/CMakeLists.txt
+++ b/src/ui/CMakeLists.txt
@@ -53,6 +53,7 @@ add_library(cru_ui SHARED
 	render/ScrollRenderObject.cpp
 	render/StackLayoutRenderObject.cpp
 	render/TextRenderObject.cpp
+	render/TreeRenderObject.cpp
 	style/Condition.cpp
 	style/Styler.cpp
 	style/StyleRule.cpp
diff --git a/src/ui/render/TreeRenderObject.cpp b/src/ui/render/TreeRenderObject.cpp
new file mode 100644
index 00000000..46965b7f
--- /dev/null
+++ b/src/ui/render/TreeRenderObject.cpp
@@ -0,0 +1,48 @@
+#include "cru/ui/render/TreeRenderObject.h"
+
+namespace cru::ui::render {
+TreeRenderObjectItem::TreeRenderObjectItem(TreeRenderObject* tree_render_object,
+                                           TreeRenderObjectItem* parent)
+    : tree_render_object_(tree_render_object), parent_(parent) {}
+
+TreeRenderObjectItem::~TreeRenderObjectItem() {
+  for (auto child : children_) {
+    delete child;
+  }
+}
+
+void TreeRenderObjectItem::SetRenderObject(RenderObject* render_object) {
+  if (render_object == render_object_) return;
+  render_object_ = render_object;
+  tree_render_object_->InvalidateLayout();
+}
+
+TreeRenderObjectItem* TreeRenderObjectItem::AddItem(Index position) {
+  auto item = new TreeRenderObjectItem(tree_render_object_, this);
+  children_.insert(children_.begin() + position, item);
+  return item;
+}
+
+void TreeRenderObjectItem::RemoveItem(Index position) {
+  Expects(position >= 0 && position < children_.size());
+  delete children_[position];
+  children_.erase(children_.begin() + position);
+  tree_render_object_->InvalidateLayout();
+}
+
+TreeRenderObject::TreeRenderObject() {
+  SetChildMode(ChildMode::None);
+  root_item_ = new TreeRenderObjectItem(this, nullptr);
+}
+
+TreeRenderObject::~TreeRenderObject() { delete root_item_; }
+
+Size TreeRenderObject::OnMeasureContent(const MeasureRequirement& requirement,
+                                        const MeasureSize& preferred_size) {
+  throw Exception(u"Not implemented.");
+}
+
+void TreeRenderObject::OnLayoutContent(const Rect& content_rect) {
+  throw Exception(u"Not implemented.");
+}
+}  // namespace cru::ui::render