From 47053829c322c43032244937cb63f9da178b852d Mon Sep 17 00:00:00 2001
From: crupest <crupest@outlook.com>
Date: Tue, 3 Mar 2020 20:22:36 +0800
Subject: Write canvas render object layout logic.

---
 src/ui/render/canvas_render_object.cpp |  8 ++++++--
 src/ui/render/layout_utility.cpp       | 15 +++++++++++++++
 2 files changed, 21 insertions(+), 2 deletions(-)
 create mode 100644 src/ui/render/layout_utility.cpp

(limited to 'src/ui/render')

diff --git a/src/ui/render/canvas_render_object.cpp b/src/ui/render/canvas_render_object.cpp
index 0a442317..0508e276 100644
--- a/src/ui/render/canvas_render_object.cpp
+++ b/src/ui/render/canvas_render_object.cpp
@@ -1,5 +1,7 @@
 #include "cru/ui/render/canvas_render_object.hpp"
 
+#include "cru/ui/render/layout_utility.hpp"
+
 namespace cru::ui::render {
 CanvasRenderObject::CanvasRenderObject() : RenderObject(ChildMode::None) {}
 
@@ -17,8 +19,10 @@ RenderObject* CanvasRenderObject::HitTest(const Point& point) {
 }
 
 Size CanvasRenderObject::OnMeasureContent(const Size& available_size) {
-  return Size{};
+  return Min(available_size, GetDesiredSize());
 }
 
-void CanvasRenderObject::OnLayoutContent(const Rect& content_rect) {}
+void CanvasRenderObject::OnLayoutContent(const Rect& content_rect) {
+  CRU_UNUSED(content_rect)
+}
 }  // namespace cru::ui::render
diff --git a/src/ui/render/layout_utility.cpp b/src/ui/render/layout_utility.cpp
new file mode 100644
index 00000000..aae62d35
--- /dev/null
+++ b/src/ui/render/layout_utility.cpp
@@ -0,0 +1,15 @@
+#include "cru/ui/render/layout_utility.hpp"
+
+#include <algorithm>
+
+namespace cru::ui::render {
+Size Min(const Size& left, const Size& right) {
+  return Size{std::min(left.width, right.width),
+              std::min(left.height, right.height)};
+}
+
+Size Max(const Size& left, const Size& right) {
+  return Size{std::max(left.width, right.width),
+              std::max(left.height, right.height)};
+}
+}  // namespace cru::ui::render
-- 
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