+ CharacterIndex GetLogicalCharacterIndex( CharacterIndex visualCharacterIndex );
+
+ /**
+ * @brief Fetch the bidirectional line info for the given character.
+ *
+ * Call GetBidirectionalLineInfo() to retrieve the last fetched line.
+ *
+ * @param[in] characterIndex The character index.
+ *
+ * @return @e true if the given @e character is in a bidirectional line.
+ */
+ bool FetchBidirectionalLineInfo( CharacterIndex characterIndex );
+
+ /**
+ * @brief Retrieves the last fetched bidirectional line info.
+ *
+ * @return The index of the bidirectional line info.
+ */
+ BidirectionalLineRunIndex GetBidirectionalLineInfo() const;
+
+ // Text style.
+
+ /**
+ * @brief Updates the text's style runs with the added or removed text.
+ *
+ * @param[in] index The character's index.
+ * @param[in] numberOfCharacters The number of characters added or removed. If the value is negative the characters are removed.
+ */
+ void UpdateTextStyleRuns( CharacterIndex index, int numberOfCharacters );
+
+ /**
+ * @brief Retrieves the text's style for the given character index.
+ *
+ * @param[in] index The character index.
+ * @param[out] style The text's style in the given style.
+ */
+ void RetrieveStyle( CharacterIndex index, InputStyle& style );
+
+ /**
+ * @brief Clears the font description runs.
+ */
+ void ClearFontDescriptionRuns();
+
+ // Paragraphs
+
+ /**
+ * @brief Creates the paragraph info.
+ *
+ * @pre The line break info must be set.
+ *
+ * @param[in] startIndex The character from where the paragraph info is set.
+ * @param[in] numberOfCharacters The number of characters.
+ */
+ void CreateParagraphInfo( CharacterIndex startIndex,
+ Length numberOfCharacters );
+
+ /**
+ * @brief Find the paragraphs which contains the given characters.
+ *
+ * @param[in] index The first character's index of the run.
+ * @param[in] numberOfCharacters The number of characters of the run.
+ * @param[out] paragraphs Indices to the paragraphs which contain the characters.
+ */
+ void FindParagraphs( CharacterIndex index,
+ Length numberOfCharacters,
+ Vector<ParagraphRunIndex>& paragraphs );
+
+ // Embedded images
+
+ /**
+ * @brief Clears the embedded images.
+ */
+ void ClearEmbeddedImages();