add letter-spacing support to CSS subsystem

The implementation in the fltk backend is still missing.

1 files changed, 4 insertions, 0 deletions

diff --git a/src/css.hh b/src/css.hh
index 1d7dc547..c1303ffd 100644
--- a/src/css.hh
+++ b/src/css.hh
@@ -249,6 +249,10 @@ typedef enum {
    CSS_FONT_SIZE_X_SMALL,
 } CssFontSizeExtensions;
 
+typedef enum {
+   CSS_LETTER_SPACING_NORMAL
+} CssLetterSpacingExtensions;
+
 
 /**
  * \brief This class holds a CSS property and value pair.