X-Git-Url: https://git.lyx.org/gitweb/?a=blobdiff_plain;f=src%2FBidi.h;h=c406a7a2b52ed995ab5e5f8f0f8a1be2c5f8524f;hb=f76d6997b710f7fb5180f0cd05415786de5d9417;hp=a2b49b1fc11e0b1b8922222170e7d026651db748;hpb=fc6ce7cd08562fd7bab4427880b46390bb7d2f07;p=lyx.git

diff --git a/src/Bidi.h b/src/Bidi.h
index a2b49b1fc1..c406a7a2b5 100644
--- a/src/Bidi.h
+++ b/src/Bidi.h
@@ -13,12 +13,14 @@
 #define BIDI_H
 
 #include "support/types.h"
+
 #include <vector>
 
 
 namespace lyx {
 
 class Buffer;
+class Cursor;
 class Paragraph;
 class Row;
 class Font;
@@ -33,19 +35,27 @@ public:
 	///
 	bool isBoundary(Buffer const &, Paragraph const & par,
 				pos_type pos, Font const & font) const;
-	///
+	/** Maps positions in the visual string to positions
+	 *  in logical string.
+	 */
 	pos_type log2vis(pos_type pos) const;
 	/** Maps positions in the logical string to positions
 	 *  in visual string.
 	 */
 	pos_type vis2log(pos_type pos) const;
-	///
+	/* 
+	 * The text direction at logical position \param pos.
+	 * Possible values are
+	 *  0: left-to-right text
+	 *  1: right-to-left text
+	 *  2: left-to-right text in right-to-left language (aka numbers)
+	 */
 	pos_type level(pos_type pos) const;
-	///
+	/// Is logical position covered by this row?
 	bool inRange(pos_type pos) const;
-	/// same_direction?
+	/// Is the whole row in the same direction as the paragraph?
 	bool same_direction() const;
-	///
+	/// Compute the data for visual positions. 
 	void computeTables(Paragraph const & par,
 			   Buffer const &, Row const & row);
 private:
@@ -65,6 +75,11 @@ private:
 	pos_type end_;
 };
 
+/// Should interpretation of the arrow keys be reversed?
+bool reverseDirectionNeeded(Cursor const & cur);
+
+/// Is current paragraph in RTL mode?
+bool isWithinRtlParagraph(Cursor const & cur);
 
 } // namespace lyx