X-Git-Url: https://git.lyx.org/gitweb/?a=blobdiff_plain;f=src%2Ffrontends%2FFontMetrics.h;h=53f57a2880075b513d35aff12fd674f2319b7c6e;hb=abefdcaf309554ae9ea506affcb84e6c0219128c;hp=808658de03fe860de8c3e057a41633617e32796c;hpb=5ddc612b735317d5b22553a63aad7879503e3950;p=lyx.git

diff --git a/src/frontends/FontMetrics.h b/src/frontends/FontMetrics.h
index 808658de03..53f57a2880 100644
--- a/src/frontends/FontMetrics.h
+++ b/src/frontends/FontMetrics.h
@@ -14,7 +14,7 @@
 #ifndef FONT_METRICS_H
 #define FONT_METRICS_H
 
-#include "support/docstring.h"
+#include "support/strfwd.h"
 
 /**
  * A class holding helper functions for determining
@@ -63,6 +63,9 @@ public:
 	/// return default dimension of the font.
 	/// \warning \c width is set to zero.
 	virtual Dimension const defaultDimension() const = 0;
+	/// return the em size
+	virtual int em() const = 0;
+
 	/// return the width of the char in the font
 	virtual int width(char_type c) const = 0;
 	/// return the ascent of the char in the font
@@ -77,6 +80,19 @@ public:
 	virtual int width(docstring const & s) const = 0;
 	/// FIXME ??
 	virtual int signedWidth(docstring const & s) const = 0;
+	/**
+	 * return the x offset of a position in the string. The
+	 * direction of the string is forced, and the returned value
+	 * is from the left edge of the word, not from the start of the string.
+	 */
+	virtual int pos2x(docstring const & s, int pos, bool rtl) const = 0;
+	/**
+	 * return the position in the string for a given x offset. The
+	 * direction of the string is forced, and the returned value
+	 * is from the left edge of the word, not from the start of the string.
+	 * the offset x is updated to match the closest position in the string.
+	 */
+	virtual int x2pos(docstring const & s, int & x, bool rtl) const = 0;
 	/// return char dimension for the font.
 	virtual Dimension const dimension(char_type c) const = 0;
 	/**
@@ -97,15 +113,10 @@ public:
 		int & descent) const = 0;
 
 	/// return the maximum descent of the font
-	inline int maxHeight() const {
-		return maxAscent() + maxDescent();
-	}
+	inline int maxHeight() const { return maxAscent() + maxDescent(); }
 
 	/// return the descent of the char in the font
-	inline int height(char_type c) const
-	{
-		return ascent(c) + descent(c);
-	}
+	inline int height(char_type c) const { return ascent(c) + descent(c); }
 
 	/// return the inner width of the char in the font
 	inline int center(char_type c) const {