1 files changed, 99 insertions, 59 deletions

diff --git a/src/ui/render/render_object.cpp b/src/ui/render/render_object.cpp
index c2aaeb62..0035d1be 100644
--- a/src/ui/render/render_object.cpp
+++ b/src/ui/render/render_object.cpp
@@ -1,90 +1,130 @@
 #include "render_object.hpp"
-#include <utility>
 
-namespace cru::ui::render
-{
-void RenderObject::SetRenderHost(IRenderHost* new_render_host)
-{
-    if (new_render_host == render_host_) return;
+#include "cru_debug.hpp"
 
-    const auto old = render_host_;
-    render_host_ = new_render_host;
-    OnRenderHostChanged(old, new_render_host);
+namespace cru::ui::render {
+void RenderObject::SetRenderHost(IRenderHost* new_render_host) {
+  if (new_render_host == render_host_) return;
+
+  const auto old = render_host_;
+  render_host_ = new_render_host;
+  OnRenderHostChanged(old, new_render_host);
 }
 
-void RenderObject::AddChild(RenderObject* render_object, const int position)
-{
-    if (render_object->GetParent() != nullptr)
-        throw std::invalid_argument("Render object already has a parent.");
+void RenderObject::AddChild(RenderObject* render_object, const int position) {
+  if (render_object->GetParent() != nullptr)
+    throw std::invalid_argument("Render object already has a parent.");
 
-    if (position < 0)
-        throw std::invalid_argument("Position index is less than 0.");
+  if (position < 0)
+    throw std::invalid_argument("Position index is less than 0.");
 
-    if (static_cast<std::vector<RenderObject*>::size_type>(position) >
-        children_.size())
-        throw std::invalid_argument("Position index is out of bound.");
+  if (static_cast<std::vector<RenderObject*>::size_type>(position) >
+      children_.size())
+    throw std::invalid_argument("Position index is out of bound.");
 
-    children_.insert(children_.cbegin() + position, render_object);
-    render_object->SetParent(this);
-    OnAddChild(render_object, position);
+  children_.insert(children_.cbegin() + position, render_object);
+  render_object->SetParent(this);
+  OnAddChild(render_object, position);
 }
 
-void RenderObject::RemoveChild(const int position)
-{
-    if (position < 0)
-        throw std::invalid_argument("Position index is less than 0.");
+void RenderObject::RemoveChild(const int position) {
+  if (position < 0)
+    throw std::invalid_argument("Position index is less than 0.");
 
-    if (static_cast<std::vector<RenderObject*>::size_type>(position) >=
-        children_.size())
-        throw std::invalid_argument("Position index is out of bound.");
+  if (static_cast<std::vector<RenderObject*>::size_type>(position) >=
+      children_.size())
+    throw std::invalid_argument("Position index is out of bound.");
 
-    const auto i = children_.cbegin() + position;
-    const auto removed_child = *i;
-    children_.erase(i);
-    removed_child->SetParent(nullptr);
-    OnRemoveChild(removed_child, position);
+  const auto i = children_.cbegin() + position;
+  const auto removed_child = *i;
+  children_.erase(i);
+  removed_child->SetParent(nullptr);
+  OnRemoveChild(removed_child, position);
 }
 
+void RenderObject::Measure(const Size& available_size) {
+  OnMeasureCore(available_size);
+}
 
-void RenderObject::OnRenderHostChanged(IRenderHost* old_render_host,
-                                       IRenderHost* new_render_host)
-{
+void RenderObject::Layout(const Rect& rect) {
+  SetOffset(rect.GetLeftTop());
+  SetSize(rect.GetSize());
+  OnLayoutCore(Rect{Point::Zero(), rect.GetSize()});
 }
 
-void RenderObject::InvalidateRenderHostPaint() const
-{
-    if (render_host_ != nullptr) render_host_->InvalidatePaint();
+void RenderObject::OnRenderHostChanged(IRenderHost* old_render_host,
+                                       IRenderHost* new_render_host) {}
+
+void RenderObject::InvalidateRenderHostPaint() const {
+  if (render_host_ != nullptr) render_host_->InvalidatePaint();
 }
 
-void RenderObject::InvalidateRenderHostLayout() const
-{
-    if (render_host_ != nullptr) render_host_->InvalidateLayout();
+void RenderObject::InvalidateRenderHostLayout() const {
+  if (render_host_ != nullptr) render_host_->InvalidateLayout();
 }
 
 void RenderObject::OnParentChanged(RenderObject* old_parent,
-                                   RenderObject* new_parent)
-{
-}
+                                   RenderObject* new_parent) {}
 
+void RenderObject::OnAddChild(RenderObject* new_child, int position) {}
 
-void RenderObject::OnAddChild(RenderObject* new_child, int position)
-{
-}
+void RenderObject::OnRemoveChild(RenderObject* removed_child, int position) {}
 
-void RenderObject::OnRemoveChild(RenderObject* removed_child, int position)
-{
+void RenderObject::SetParent(RenderObject* new_parent) {
+  const auto old_parent = parent_;
+  parent_ = new_parent;
+  OnParentChanged(old_parent, new_parent);
 }
 
-void RenderObject::SetParent(RenderObject* new_parent)
-{
-    const auto old_parent = parent_;
-    parent_ = new_parent;
-    OnParentChanged(old_parent, new_parent);
+void RenderObject::OnMeasureCore(const Size& available_size) {
+  Size margin_padding_size{
+      margin_.GetHorizontalTotal() + padding_.GetHorizontalTotal(),
+      margin_.GetVerticalTotal() + padding_.GetVerticalTotal()};
+  const auto content_available_size = available_size - margin_padding_size;
+  auto coerced_content_available_size = content_available_size;
+
+  if (coerced_content_available_size.width < 0) {
+    debug::DebugMessage(
+        L"Measure: horizontal length of padding and margin is bigger than "
+        L"available length.");
+    coerced_content_available_size.width = 0;
+  }
+  if (coerced_content_available_size.height < 0) {
+    debug::DebugMessage(
+        L"Measure: vertical length of padding and margin is bigger than "
+        L"available length.");
+    coerced_content_available_size.height = 0;
+  }
+
+  const auto actual_content_size =
+      OnMeasureContent(coerced_content_available_size);
+
+  SetPreferredSize(margin_padding_size + content_available_size +
+                   actual_content_size);
 }
 
-
-void LinearLayoutRenderObject::Measure(const MeasureConstraint& constraint)
-{
-
+void RenderObject::OnLayoutCore(const Rect& rect) {
+  Size margin_padding_size{
+      margin_.GetHorizontalTotal() + padding_.GetHorizontalTotal(),
+      margin_.GetVerticalTotal() + padding_.GetVerticalTotal()};
+  const auto content_available_size = rect.GetSize() - margin_padding_size;
+  auto coerced_content_available_size = content_available_size;
+
+  if (coerced_content_available_size.width < 0) {
+    debug::DebugMessage(
+        L"Layout: horizontal length of padding and margin is bigger than "
+        L"available length.");
+    coerced_content_available_size.width = 0;
+  }
+  if (coerced_content_available_size.height < 0) {
+    debug::DebugMessage(
+        L"Layout: vertical length of padding and margin is bigger than "
+        L"available length.");
+    coerced_content_available_size.height = 0;
+  }
+
+  OnLayoutContent(Rect{margin_.left + padding_.left, margin_.top + padding_.top,
+                       coerced_content_available_size.width,
+                       coerced_content_available_size.height});
 }
 }  // namespace cru::ui::render