Add Effect::{Bold,Italic,Underline}

src/backend/blt.rs

@@ -177,6 +177,10 @@ impl backend::Backend for Concrete {
 
     fn with_effect<F: FnOnce()>(&self, effect: Effect, f: F) {
         match effect {
+            // TODO: does BLT support bold/italic/underline?
+            Effect::Bold |
+            Effect::Italic |
+            Effect::Underline |
             Effect::Simple => f(),
             // TODO: how to do this correctly?`
             //       BLT itself doesn't do this kind of thing,

src/backend/curses/n.rs

@@ -229,6 +229,10 @@ impl backend::Backend for Concrete {
         let style = match effect {
             Effect::Reverse => ncurses::A_REVERSE(),
             Effect::Simple => ncurses::A_NORMAL(),
+            Effect::Bold => ncurses::A_BOLD(),
+            // Effect::Italic => ncurses::A_ITALIC(),
+            Effect::Italic => ncurses::A_NORMAL(),
+            Effect::Underline => ncurses::A_UNDERLINE(),
         };
         ncurses::attron(style);
         f();

src/backend/curses/pan.rs

@@ -187,8 +187,11 @@ impl backend::Backend for Concrete {
 
     fn with_effect<F: FnOnce()>(&self, effect: Effect, f: F) {
         let style = match effect {
-            Effect::Reverse => pancurses::Attribute::Reverse,
             Effect::Simple => pancurses::Attribute::Normal,
+            Effect::Reverse => pancurses::Attribute::Reverse,
+            Effect::Bold => pancurses::Attribute::Bold,
+            Effect::Italic => pancurses::Attribute::Italic,
+            Effect::Underline => pancurses::Attribute::Underline,
         };
         self.window.attron(style);
         f();

src/backend/termion.rs

@@ -39,6 +39,9 @@ impl Effectable for theme::Effect {
         match *self {
             theme::Effect::Simple => (),
             theme::Effect::Reverse => print!("{}", tstyle::Invert),
+            theme::Effect::Bold => print!("{}", tstyle::Bold),
+            theme::Effect::Italic => print!("{}", tstyle::Italic),
+            theme::Effect::Underline => print!("{}", tstyle::Underline),
         }
     }
 
@@ -46,6 +49,9 @@ impl Effectable for theme::Effect {
         match *self {
             theme::Effect::Simple => (),
             theme::Effect::Reverse => print!("{}", tstyle::NoInvert),
+            theme::Effect::Bold => print!("{}", tstyle::NoBold),
+            theme::Effect::Italic => print!("{}", tstyle::NoItalic),
+            theme::Effect::Underline => print!("{}", tstyle::NoUnderline),
         }
     }
 }

src/theme.rs

@@ -127,7 +127,12 @@ pub enum Effect {
     Simple,
     /// Reverses foreground and background colors
     Reverse,
-    // TODO: bold, italic, underline
+    /// Prints foreground in bold
+    Bold,
+    /// Prints foreground in italic
+    Italic,
+    /// Prints foreground with underline
+    Underline,
 }
 
 /// Combines a front and back color.