Change the structure of project.

1 files changed, 244 insertions, 0 deletions

diff --git a/src/ui/controls/text_box.cpp b/src/ui/controls/text_box.cpp
new file mode 100644
index 00000000..a8d78398
--- /dev/null
+++ b/src/ui/controls/text_box.cpp
@@ -0,0 +1,244 @@
+#include "text_box.h"
+
+#include <cwctype>
+
+#include "graph/graph.h"
+#include "exception.h"
+
+namespace cru::ui::controls
+{
+    using graph::CreateSolidBrush;
+
+    inline Microsoft::WRL::ComPtr<IDWriteFactory> GetDWriteFactory()
+    {
+        return graph::GraphManager::GetInstance()->GetDWriteFactory();
+    }
+
+    TextBox::TextBox(const Microsoft::WRL::ComPtr<IDWriteTextFormat>& init_text_format,
+        const Microsoft::WRL::ComPtr<ID2D1Brush>& init_brush) : Control(false)
+    {
+        text_format_ = init_text_format == nullptr ? graph::CreateDefaultTextFormat() : init_text_format;
+
+        RecreateTextLayout();
+
+        brush_ = init_brush == nullptr ? CreateSolidBrush(D2D1::ColorF(D2D1::ColorF::Black)) : init_brush;
+
+        caret_brush_ = CreateSolidBrush(D2D1::ColorF(D2D1::ColorF::Black));
+
+        caret_action_ = CreateActionPtr([this]
+        {
+            is_caret_show_ = !is_caret_show_;
+            Repaint();
+        });
+
+        //selection_brush_ = CreateSolidBrush(D2D1::ColorF(D2D1::ColorF::LightSkyBlue));
+    }
+
+    TextBox::~TextBox() = default;
+
+    void TextBox::SetText(const String& text)
+    {
+        if (text_ != text)
+        {
+            const auto old_text = text_;
+            text_ = text;
+            OnTextChangedCore(old_text, text);
+        }
+    }
+
+    void TextBox::SetBrush(const Microsoft::WRL::ComPtr<ID2D1Brush>& brush)
+    {
+        brush_ = brush;
+        Repaint();
+    }
+
+    void TextBox::SetTextFormat(const Microsoft::WRL::ComPtr<IDWriteTextFormat>& text_format)
+    {
+        text_format_ = text_format;
+        RecreateTextLayout();
+        Repaint();
+    }
+
+    void TextBox::OnSizeChangedCore(events::SizeChangedEventArgs& args)
+    {
+        Control::OnSizeChangedCore(args);
+        text_layout_->SetMaxWidth(args.GetNewSize().width);
+        text_layout_->SetMaxHeight(args.GetNewSize().height);
+        Repaint();
+    }
+
+    void TextBox::OnDraw(ID2D1DeviceContext* device_context)
+    {
+        Control::OnDraw(device_context);
+        if (text_layout_ != nullptr)
+        {
+            device_context->DrawTextLayout(D2D1::Point2F(), text_layout_.Get(), brush_.Get());
+            if (is_caret_show_)
+            {
+                const auto caret_half_width = Application::GetInstance()->GetCaretInfo().half_caret_width;
+                FLOAT x, y;
+                DWRITE_HIT_TEST_METRICS metrics{};
+                ThrowIfFailed(text_layout_->HitTestTextPosition(position_, FALSE, &x, &y, &metrics));
+                device_context->FillRectangle(D2D1::RectF(metrics.left - caret_half_width, metrics.top, metrics.left + caret_half_width, metrics.top + metrics.height), caret_brush_.Get());
+            }
+        }
+    }
+
+    namespace
+    {
+        std::optional<unsigned> TextLayoutHitTest(IDWriteTextLayout* text_layout, const Point& point, bool test_inside = true)
+        {
+            BOOL is_trailing, is_inside;
+            DWRITE_HIT_TEST_METRICS metrics{};
+            text_layout->HitTestPoint(point.x, point.y, &is_trailing, &is_inside, &metrics);
+            if (!test_inside || is_inside)
+                return is_trailing == 0 ? metrics.textPosition : metrics.textPosition + 1;
+            else
+                return std::nullopt;
+        }
+    }
+
+    void TextBox::OnMouseDownCore(events::MouseButtonEventArgs& args)
+    {
+        Control::OnMouseDownCore(args);
+        if (args.GetMouseButton() == MouseButton::Left)
+        {
+            position_ = TextLayoutHitTest(text_layout_.Get(), args.GetPoint(this), false).value();
+
+            Repaint();
+        }
+    }
+
+    void TextBox::OnGetFocusCore(events::FocusChangeEventArgs& args)
+    {
+        Control::OnGetFocusCore(args);
+        assert(caret_timer_ == nullptr);
+        is_caret_show_ = true;
+        caret_timer_ = SetInterval(Application::GetInstance()->GetCaretInfo().caret_blink_duration, caret_action_);
+    }
+
+    void TextBox::OnLoseFocusCore(events::FocusChangeEventArgs& args)
+    {
+        Control::OnLoseFocusCore(args);
+        assert(caret_timer_ != nullptr);
+        caret_timer_->Cancel();
+        is_caret_show_ = false;
+    }
+
+    void TextBox::OnKeyDownCore(events::KeyEventArgs& args)
+    {
+        Control::OnKeyDownCore(args);
+        if (args.GetVirtualCode() == VK_LEFT && position_ > 0)
+        {
+            position_--;
+            Repaint();
+        }
+
+        if (args.GetVirtualCode() == VK_RIGHT && position_ < GetText().size())
+        {
+            position_++;
+            Repaint();
+        }
+    }
+
+    void TextBox::OnCharCore(events::CharEventArgs& args)
+    {
+        Control::OnCharCore(args);
+        if (args.GetChar() == L'\b')
+        {
+            auto text = GetText();
+            if (!text.empty() && position_ > 0)
+            {
+                const auto position = --position_;
+                text.erase(position);
+                SetText(text);
+            }
+            return;
+        }
+
+        if (std::iswprint(args.GetChar()))
+        {
+            const auto position = position_++;
+            auto text = GetText();
+            text.insert(text.cbegin() + position, { args.GetChar() });
+            SetText(text);
+        }
+    }
+
+    Size TextBox::OnMeasure(const Size& available_size)
+    {
+        const auto layout_params = GetLayoutParams();
+
+        if (layout_params->width.mode == MeasureMode::Stretch && layout_params->height.mode == MeasureMode::Stretch)
+            return available_size;
+
+        auto&& get_measure_length = [](const LayoutSideParams& layout_length, const float available_length) -> float
+        {
+            switch (layout_length.mode)
+            {
+            case MeasureMode::Exactly:
+            {
+                return std::min(layout_length.length, available_length);
+            }
+            case MeasureMode::Stretch:
+            case MeasureMode::Content:
+            {
+                return available_length;
+            }
+            default:
+                UnreachableCode();
+            }
+        };
+
+        const Size measure_size(get_measure_length(layout_params->width, available_size.width),
+            get_measure_length(layout_params->height, available_size.height));
+
+        ThrowIfFailed(text_layout_->SetMaxWidth(measure_size.width));
+        ThrowIfFailed(text_layout_->SetMaxHeight(measure_size.height));
+
+        DWRITE_TEXT_METRICS metrics{};
+
+        ThrowIfFailed(text_layout_->GetMetrics(&metrics));
+
+        const Size measure_result(metrics.width, metrics.height);
+
+        auto&& calculate_final_length = [](const LayoutSideParams& layout_length, const float measure_length, const float measure_result_length) -> float
+        {
+            if ((layout_length.mode == MeasureMode::Stretch ||
+                layout_length.mode == MeasureMode::Exactly)
+                && measure_result_length < measure_length)
+                return measure_length;
+            else
+                return measure_result_length;
+        };
+
+        const Size result_size(
+            calculate_final_length(layout_params->width, measure_size.width, measure_result.width),
+            calculate_final_length(layout_params->height, measure_size.height, measure_result.height)
+        );
+
+        return result_size;
+    }
+
+    void TextBox::OnTextChangedCore(const String& old_text, const String& new_text)
+    {
+        RecreateTextLayout();
+        Repaint();
+    }
+
+    void TextBox::RecreateTextLayout()
+    {
+        assert(text_format_ != nullptr);
+
+        const auto dwrite_factory = GetDWriteFactory();
+
+        const auto&& size = GetSize();
+
+        ThrowIfFailed(dwrite_factory->CreateTextLayout(
+            text_.c_str(), static_cast<UINT32>(text_.size()),
+            text_format_.Get(),
+            size.width, size.height,
+            &text_layout_
+        ));
+    }
+}