1 files changed, 56 insertions, 2 deletions
diff --git a/src/platform/graphics/cairo/PangoTextLayout.cpp b/src/platform/graphics/cairo/PangoTextLayout.cpp
index 2fcb9158..9f43af11 100644
--- a/src/platform/graphics/cairo/PangoTextLayout.cpp
+++ b/src/platform/graphics/cairo/PangoTextLayout.cpp
@@ -1,4 +1,5 @@
 #include "cru/platform/graphics/cairo/PangoTextLayout.h"
+#include "cru/common/StringUtil.h"
 #include "cru/platform/Check.h"
 #include "cru/platform/graphics/cairo/CairoGraphicsFactory.h"
 #include "cru/platform/graphics/cairo/PangoFont.h"
@@ -20,8 +21,8 @@ String PangoTextLayout::GetText() { return text_; }
 
 void PangoTextLayout::SetText(String new_text) {
   text_ = std::move(new_text);
-  auto text_utf8 = text_.ToUtf8();
-  pango_layout_set_text(pango_layout_, text_utf8.c_str(), text_utf8.size());
+  utf8_text_ = text_.ToUtf8();
+  pango_layout_set_text(pango_layout_, utf8_text_.c_str(), utf8_text_.size());
 }
 
 std::shared_ptr<IFont> PangoTextLayout::GetFont() { return font_; }
@@ -32,4 +33,57 @@ void PangoTextLayout::SetFont(std::shared_ptr<IFont> font) {
   pango_layout_set_font_description(pango_layout_,
                                     font_->GetPangoFontDescription());
 }
+
+void PangoTextLayout::SetMaxWidth(float max_width) {
+  return pango_layout_set_width(pango_layout_, max_width);
+}
+
+void PangoTextLayout::SetMaxHeight(float max_height) {
+  return pango_layout_set_height(pango_layout_, max_height);
+}
+
+bool PangoTextLayout::IsEditMode() { return edit_mode_; }
+
+void PangoTextLayout::SetEditMode(bool enable) { edit_mode_ = enable; }
+
+Index PangoTextLayout::GetLineIndexFromCharIndex(Index char_index) {
+  int line;
+  pango_layout_index_to_line_x(pango_layout_,
+                               FromUtf16IndexToUtf8Index(char_index), false,
+                               &line, nullptr);
+  return line;
+}
+
+Index PangoTextLayout::GetLineCount() {
+  return pango_layout_get_line_count(pango_layout_);
+}
+
+float PangoTextLayout::GetLineHeight(Index line_index) {
+  auto line = pango_layout_get_line_readonly(pango_layout_, line_index);
+  int height;
+  pango_layout_line_get_height(line, &height);
+  return height;
+}
+
+Index PangoTextLayout::FromUtf8IndexToUtf16Index(Index index) {
+  Utf8CodePointIterator iter(utf8_text_.data(), utf8_text_.size());
+  int cp_count = 0;
+  while ((!iter.IsPastEnd()) && iter.GetPosition() < index) {
+    ++iter;
+    cp_count++;
+  }
+  return text_.IndexFromCodePointToCodeUnit(cp_count);
+}
+
+Index PangoTextLayout::FromUtf16IndexToUtf8Index(Index index) {
+  Index cp_index = text_.IndexFromCodeUnitToCodePoint(index);
+  Utf8CodePointIterator iter(utf8_text_.data(), utf8_text_.size());
+
+  for (Index i = 0; i < cp_index; ++i) {
+    ++iter;
+  }
+
+  return iter.GetPosition();
+}
+
 }  // namespace cru::platform::graphics::cairo