1 files changed, 95 insertions, 0 deletions
diff --git a/include/cru/platform/graphics/quartz/TextLayout.h b/include/cru/platform/graphics/quartz/TextLayout.h
new file mode 100644
index 00000000..0d23360d
--- /dev/null
+++ b/include/cru/platform/graphics/quartz/TextLayout.h
@@ -0,0 +1,95 @@
+#pragma once
+#include "Resource.h"
+
+#include "Font.h"
+#include "cru/common/Base.h"
+#include "cru/platform/graphics/TextLayout.h"
+
+#include <memory>
+
+namespace cru::platform::graphics::quartz {
+class OsxCTTextLayout : public OsxQuartzResource, public virtual ITextLayout {
+ public:
+  OsxCTTextLayout(IGraphicsFactory* graphics_factory,
+                  std::shared_ptr<OsxCTFont> font, const String& str);
+
+  CRU_DELETE_COPY(OsxCTTextLayout)
+  CRU_DELETE_MOVE(OsxCTTextLayout)
+
+  ~OsxCTTextLayout() override;
+
+ public:
+  String GetText() override { return text_; }
+  void SetText(String new_text) override;
+
+  std::shared_ptr<IFont> GetFont() override { return font_; }
+  void SetFont(std::shared_ptr<IFont> font) override;
+
+  void SetMaxWidth(float max_width) override;
+  void SetMaxHeight(float max_height) override;
+
+  bool IsEditMode() override;
+  void SetEditMode(bool enable) override;
+
+  Index GetLineIndexFromCharIndex(Index char_index) override;
+  Index GetLineCount() override;
+  float GetLineHeight(Index line_index) override;
+
+  Rect GetTextBounds(bool includingTrailingSpace = false) override;
+  std::vector<Rect> TextRangeRect(const TextRange& text_range) override;
+  Rect TextSinglePoint(Index position, bool trailing) override;
+  TextHitTestResult HitTest(const Point& point) override;
+
+  CTFrameRef GetCTFrameRef() const { return ct_frame_; }
+
+  CTFrameRef CreateFrameWithColor(const Color& color);
+
+  Matrix GetTransform() { return transform_; }
+
+  String GetDebugString() override;
+
+ private:
+  void DoSetText(String text);
+
+  void ReleaseResource();
+  void RecreateFrame();
+
+  CGRect DoGetTextBounds(bool includingTrailingSpace = false);
+  CGRect DoGetTextBoundsIncludingEmptyLines(
+      bool includingTrailingSpace = false);
+  std::vector<CGRect> DoTextRangeRect(const TextRange& text_range);
+  CGRect DoTextSinglePoint(Index position, bool trailing);
+
+ private:
+  float max_width_;
+  float max_height_;
+
+  bool edit_mode_;
+
+  std::shared_ptr<OsxCTFont> font_;
+
+  String text_;
+  String actual_text_;
+  CFMutableAttributedStringRef cf_attributed_text_;
+
+  CTFramesetterRef ct_framesetter_ = nullptr;
+  float suggest_height_;
+  CTFrameRef ct_frame_ = nullptr;
+  int line_count_;
+  std::vector<CGPoint> line_origins_;
+  std::vector<CTLineRef> lines_;
+  std::vector<float> line_ascents_;
+  std::vector<float> line_descents_;
+  std::vector<float> line_heights_;
+  // The empty line count in the front of the lines.
+  int head_empty_line_count_;
+  // The trailing empty line count in the back of the lines.
+  int tail_empty_line_count_;
+
+  // Just for cache.
+  CGRect text_bounds_without_trailing_space_;
+  CGRect text_bounds_with_trailing_space_;
+
+  Matrix transform_;
+};
+}  // namespace cru::platform::graphics::quartz