1 files changed, 116 insertions, 0 deletions
diff --git a/src/ui/controls/text_block.h b/src/ui/controls/text_block.h
new file mode 100644
index 00000000..c87ffc51
--- /dev/null
+++ b/src/ui/controls/text_block.h
@@ -0,0 +1,116 @@
+#pragma once
+
+#include <memory>
+#include <optional>
+
+#include "ui/control.h"
+
+namespace cru
+{
+    namespace ui
+    {
+        namespace controls
+        {
+            class TextBlock : public Control
+            {
+            public:
+                using TextLayoutHandlerPtr = FunctionPtr<void(Microsoft::WRL::ComPtr<IDWriteTextLayout>)>;
+
+                static TextBlock* Create(
+                    const String& text = L"",
+                    const Microsoft::WRL::ComPtr<IDWriteTextFormat>& init_text_format = nullptr,
+                    const Microsoft::WRL::ComPtr<ID2D1Brush>& init_brush = nullptr)
+                {
+                    const auto text_block = new TextBlock(init_text_format, init_brush);
+                    text_block->SetText(text);
+                    return text_block;
+                }
+
+            protected:
+                explicit TextBlock(
+                    const Microsoft::WRL::ComPtr<IDWriteTextFormat>& init_text_format = nullptr,
+                    const Microsoft::WRL::ComPtr<ID2D1Brush>& init_brush = nullptr
+                );
+            public:
+                TextBlock(const TextBlock& other) = delete;
+                TextBlock(TextBlock&& other) = delete;
+                TextBlock& operator=(const TextBlock& other) = delete;
+                TextBlock& operator=(TextBlock&& other) = delete;
+                ~TextBlock() override;
+
+                String GetText() const
+                {
+                    return text_;
+                }
+
+                void SetText(const String& text);
+
+                Microsoft::WRL::ComPtr<ID2D1Brush> GetBrush() const
+                {
+                    return brush_;
+                }
+
+                void SetBrush(const Microsoft::WRL::ComPtr<ID2D1Brush>& brush);
+
+                Microsoft::WRL::ComPtr<IDWriteTextFormat> GetTextFormat() const
+                {
+                    return text_format_;
+                }
+
+                void SetTextFormat(const Microsoft::WRL::ComPtr<IDWriteTextFormat>& text_format);
+
+
+                void AddTextLayoutHandler(TextLayoutHandlerPtr handler);
+
+                void RemoveTextLayoutHandler(const TextLayoutHandlerPtr& handler);
+
+                bool IsSelectable() const
+                {
+                    return is_selectable_;
+                }
+
+                void SetSelectable(bool is_selectable);
+
+                std::optional<TextRange> GetSelectedRange() const
+                {
+                    return selected_range_;
+                }
+
+                void SetSelectedRange(std::optional<TextRange> text_range);
+
+            protected:
+                void OnSizeChangedCore(events::SizeChangedEventArgs& args) override final;
+                void OnDraw(ID2D1DeviceContext* device_context) override;
+
+                void OnMouseDownCore(events::MouseButtonEventArgs& args) override final;
+                void OnMouseMoveCore(events::MouseEventArgs& args) override final;
+                void OnMouseUpCore(events::MouseButtonEventArgs& args) override final;
+
+                void OnLoseFocusCore(events::FocusChangeEventArgs& args) override final;
+
+                Size OnMeasure(const Size& available_size) override final;
+
+            private:
+                void OnTextChangedCore(const String& old_text, const String& new_text);
+
+                void RecreateTextLayout();
+
+            private:
+                String text_;
+
+                Microsoft::WRL::ComPtr<ID2D1Brush> brush_;
+                Microsoft::WRL::ComPtr<ID2D1Brush> selection_brush_;
+                Microsoft::WRL::ComPtr<IDWriteTextFormat> text_format_;
+                Microsoft::WRL::ComPtr<IDWriteTextLayout> text_layout_;
+
+                Vector<TextLayoutHandlerPtr> text_layout_handlers_;
+
+                bool is_selectable_ = false;
+
+                bool is_selecting_ = false;
+                unsigned mouse_down_position_ = 0;
+                std::optional<TextRange> selected_range_ = std::nullopt;
+            };
+        }
+    }
+}