...

5 files changed, 47 insertions, 22 deletions

diff --git a/include/cru/ui/render/ScrollRenderObject.hpp b/include/cru/ui/render/ScrollRenderObject.hpp
index 20b7278c..45fa3993 100644
--- a/include/cru/ui/render/ScrollRenderObject.hpp
+++ b/include/cru/ui/render/ScrollRenderObject.hpp
@@ -29,7 +29,7 @@ class ScrollRenderObject : public RenderObject {
   Point GetRawScrollOffset() const { return scroll_offset_; }
 
   // Rect lefttop relative to content rect.
-  void ScrollToContain(const Rect& rect);
+  void ScrollToContain(const Rect& rect, const Thickness& margin = Thickness{});
 
  protected:
   void OnDrawCore(platform::graph::IPainter* painter) override;
diff --git a/include/cru/ui/render/TextRenderObject.hpp b/include/cru/ui/render/TextRenderObject.hpp
index 32d96797..0b276415 100644
--- a/include/cru/ui/render/TextRenderObject.hpp
+++ b/include/cru/ui/render/TextRenderObject.hpp
@@ -66,6 +66,11 @@ class TextRenderObject : public RenderObject {
   gsl::index GetCaretPosition() const { return caret_position_; }
   void SetCaretPosition(gsl::index position);
 
+  // Lefttop relative to content lefttop.
+  Rect GetCaretRectInContent();
+  // Lefttop relative to render object lefttop.
+  Rect GetCaretRect();
+
   std::shared_ptr<platform::graph::IBrush> GetCaretBrush() const {
     return caret_brush_;
   }
diff --git a/src/ui/controls/TextControlService.hpp b/src/ui/controls/TextControlService.hpp
index 93a48c44..1108a3b2 100644
--- a/src/ui/controls/TextControlService.hpp
+++ b/src/ui/controls/TextControlService.hpp
@@ -7,6 +7,7 @@
 #include "cru/ui/Control.hpp"
 #include "cru/ui/UiEvent.hpp"
 #include "cru/ui/render/CanvasRenderObject.hpp"
+#include "cru/ui/render/ScrollRenderObject.hpp"
 #include "cru/ui/render/TextRenderObject.hpp"
 
 namespace cru::ui::controls {
@@ -140,7 +141,8 @@ class TextControlService : public Object {
     log::TagDebug(log_tag, u"Text selection updated, range: {}, {}.", old_start,
                   new_end);
     if (const auto scroll_render_object = this->GetScrollRenderObject()) {
-      // TODO: Implement this.
+      const auto caret_rect = text_render_object->GetCaretRect();
+      scroll_render_object->ScrollToContain(caret_rect, Thickness{5.f});
     }
   }
 
diff --git a/src/ui/render/ScrollRenderObject.cpp b/src/ui/render/ScrollRenderObject.cpp
index d3996b98..533a269a 100644
--- a/src/ui/render/ScrollRenderObject.cpp
+++ b/src/ui/render/ScrollRenderObject.cpp
@@ -67,9 +67,11 @@ void ScrollRenderObject::SetScrollOffset(const Point& offset) {
   InvalidateLayout();
 }
 
-void ScrollToContain(const Rect& rect) {
+void ScrollRenderObject::ScrollToContain(const Rect& rect,
+                                         const Thickness& margin) {
   // TODO: Implement this.
   CRU_UNUSED(rect);
+  CRU_UNUSED(margin);
   throw std::runtime_error("Not implemented.");
 }
 
diff --git a/src/ui/render/TextRenderObject.cpp b/src/ui/render/TextRenderObject.cpp
index 8a4a4ba1..cd248cea 100644
--- a/src/ui/render/TextRenderObject.cpp
+++ b/src/ui/render/TextRenderObject.cpp
@@ -118,6 +118,37 @@ void TextRenderObject::SetCaretWidth(const float width) {
   }
 }
 
+Rect TextRenderObject::GetCaretRectInContent() {
+  auto caret_pos = this->caret_position_;
+  gsl::index text_size = this->GetText().size();
+  if (caret_pos < 0) {
+    caret_pos = 0;
+  } else if (caret_pos > text_size) {
+    caret_pos = text_size;
+  }
+
+  const auto caret_top_center =
+      this->text_layout_->TextSinglePoint(caret_pos, false);
+
+  const auto font_height = this->font_->GetFontSize();
+  const auto caret_width = this->caret_width_;
+
+  auto rect = Rect{caret_top_center.x - caret_width / 2.0f, caret_top_center.y,
+                   caret_width, font_height};
+
+  return rect;
+}
+
+Rect TextRenderObject::GetCaretRect() {
+  auto rect = GetCaretRectInContent();
+  const auto content_rect = GetContentRect();
+
+  rect.left += content_rect.left;
+  rect.top += content_rect.top;
+
+  return rect;
+}
+
 RenderObject* TextRenderObject::HitTest(const Point& point) {
   const auto padding_rect = GetPaddingRect();
   return padding_rect.IsPointInside(point) ? this : nullptr;
@@ -134,23 +165,7 @@ void TextRenderObject::OnDrawContent(platform::graph::IPainter* painter) {
   painter->DrawText(Point{}, text_layout_.get(), brush_.get());
 
   if (this->draw_caret_ && this->caret_width_ != 0.0f) {
-    auto caret_pos = this->caret_position_;
-    gsl::index text_size = this->GetText().size();
-    if (caret_pos < 0) {
-      caret_pos = 0;
-    } else if (caret_pos > text_size) {
-      caret_pos = text_size;
-    }
-
-    const auto caret_top_center =
-        this->text_layout_->TextSinglePoint(caret_pos, false);
-
-    const auto font_height = this->font_->GetFontSize();
-    const auto caret_width = this->caret_width_;
-
-    painter->FillRectangle(Rect{caret_top_center.x - caret_width / 2.0f,
-                                caret_top_center.y, caret_width, font_height},
-                           this->caret_brush_.get());
+    painter->FillRectangle(GetCaretRectInContent(), this->caret_brush_.get());
   }
 }
 
@@ -170,8 +185,9 @@ Size TextRenderObject::OnMeasureContent(const MeasureRequirement& requirement,
 
   if (requirement.max.width.IsSpecified() &&
       text_size.width > requirement.max.width.GetLengthOrUndefined()) {
-    log::TagWarn(log_tag,
-                 u"(Measure) Text actual width exceeds the required max width.");
+    log::TagWarn(
+        log_tag,
+        u"(Measure) Text actual width exceeds the required max width.");
     result.width = requirement.max.width.GetLengthOrUndefined();
   } else {
     result.width = std::max(result.width, preferred_size.width.GetLengthOr0());