Give the background color to the clear method.

src/backend/blt.rs

@@ -6,7 +6,7 @@ use self::bear_lib_terminal::terminal::{self, Event as BltEvent, KeyCode};
 use backend;
 use event::{Event, Key};
 use std::collections::BTreeMap;
-use theme::{BaseColor, Color, ColorStyle, Effect};
+use theme::{BaseColor, Color, ColorPair, Effect};
 
 pub struct Concrete {
     colours: BTreeMap<i16, (BltColor, BltColor)>,
@@ -24,16 +24,9 @@ impl backend::Backend for Concrete {
         terminal::close();
     }
 
-    fn init_color_style(&mut self, style: ColorStyle, foreground: &Color,
+    fn with_color<F: FnOnce()>(&self, color: ColorPair, f: F) {
-                        background: &Color) {
+        let fg = colour_to_blt_colour(color.front);
-        self.colours
+        let bg = colour_to_blt_colour(color.back);
-            .insert(style.id(),
-                    (colour_to_blt_colour(foreground),
-                     colour_to_blt_colour(background)));
-    }
-
-    fn with_color<F: FnOnce()>(&self, color: ColorStyle, f: F) {
-        let (fg, bg) = self.colours[&color.id()];
         terminal::with_colors(fg, bg, f);
     }
 
@@ -61,7 +54,7 @@ impl backend::Backend for Concrete {
         (width as usize, height as usize)
     }
 
-    fn clear(&self) {
+    fn clear(&self, color: Color) {
         terminal::clear(None);
     }
 
@@ -104,8 +97,8 @@ impl backend::Backend for Concrete {
     }
 }
 
-fn colour_to_blt_colour(clr: &Color) -> BltColor {
+fn colour_to_blt_colour(clr: Color) -> BltColor {
-    let (r, g, b) = match *clr {
+    let (r, g, b) = match clr {
         // Colours taken from
         // https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
         Color::Dark(BaseColor::Black) => (0, 0, 0),
@@ -141,7 +134,7 @@ fn blt_keycode_to_ev(kc: KeyCode, shift: bool, ctrl: bool) -> Event {
         KeyCode::F1 | KeyCode::F2 | KeyCode::F3 | KeyCode::F4 |
         KeyCode::F5 | KeyCode::F6 | KeyCode::F7 | KeyCode::F8 |
         KeyCode::F9 | KeyCode::F10 | KeyCode::F11 | KeyCode::F12 |
-        KeyCode::Enter | KeyCode::Escape | KeyCode::Backspace |
+        KeyCode::NumEnter | KeyCode::Enter | KeyCode::Escape | KeyCode::Backspace |
         KeyCode::Tab | KeyCode::Pause | KeyCode::Insert | KeyCode::Home |
         KeyCode::PageUp | KeyCode::Delete | KeyCode::End |
         KeyCode::PageDown | KeyCode::Right | KeyCode::Left |
@@ -169,7 +162,7 @@ fn blt_keycode_to_ev(kc: KeyCode, shift: bool, ctrl: bool) -> Event {
         KeyCode::Apostrophe | KeyCode::Comma | KeyCode::Period |
         KeyCode::Slash | KeyCode::Space | KeyCode::NumDivide |
         KeyCode::NumMultiply | KeyCode::NumMinus | KeyCode::NumPlus |
-        KeyCode::NumEnter | KeyCode::NumPeriod | KeyCode::Num1 |
+        KeyCode::NumPeriod | KeyCode::Num1 |
         KeyCode::Num2 | KeyCode::Num3 | KeyCode::Num4 | KeyCode::Num5 |
         KeyCode::Num6 | KeyCode::Num7 | KeyCode::Num8 | KeyCode::Num9 |
         KeyCode::Num0 => {
@@ -247,7 +240,7 @@ fn blt_keycode_to_char(kc: KeyCode, shift: bool) -> char {
         KeyCode::Num8 => '8',
         KeyCode::Num9 => '9',
         KeyCode::Num0 => '0',
-        _ => unreachable!(),
+        _ => { println_stderr!("{:?}", kc); unreachable!() },
     }
 }
 
@@ -265,7 +258,7 @@ fn blt_keycode_to_key(kc: KeyCode) -> Key {
         KeyCode::F10 => Key::F10,
         KeyCode::F11 => Key::F11,
         KeyCode::F12 => Key::F12,
-        KeyCode::Enter => Key::Enter,
+        KeyCode::NumEnter | KeyCode::Enter => Key::Enter,
         KeyCode::Escape => Key::Esc,
         KeyCode::Backspace => Key::Backspace,
         KeyCode::Tab => Key::Tab,

src/backend/curses/mod.rs

@@ -1,4 +1,4 @@
-use theme::{BaseColor, Color, ColorStyle};
+use theme::{BaseColor, Color};
 
 #[cfg(feature = "ncurses")]
 mod n;
@@ -38,18 +38,3 @@ fn find_closest(color: &Color) -> u8 {
         Color::RgbLowRes(r, g, b) => (16 + 36 * r + 6 * g + b) as u8,
     }
 }
-
-fn color_id(style: ColorStyle) -> i16 {
-    match style {
-        ColorStyle::Background => 1,
-        ColorStyle::Shadow => 2,
-        ColorStyle::Primary => 3,
-        ColorStyle::Secondary => 4,
-        ColorStyle::Tertiary => 5,
-        ColorStyle::TitlePrimary => 6,
-        ColorStyle::TitleSecondary => 7,
-        ColorStyle::Highlight => 8,
-        ColorStyle::HighlightInactive => 9,
-        ColorStyle::Custom { .. } => 10,
-    }
-}

src/backend/curses/n.rs

@@ -1,11 +1,11 @@
 extern crate ncurses;
 
-use self::super::{color_id, find_closest};
+use self::super::find_closest;
 use backend;
 use event::{Event, Key};
 use std::cell::{RefCell, Cell};
 use std::collections::HashMap;
-use theme::{ColorPair, ColorStyle, Effect};
+use theme::{Color, ColorPair, Effect};
 use utf8;
 
 pub struct Concrete {
@@ -14,7 +14,10 @@ pub struct Concrete {
 }
 
 impl Concrete {
-    fn insert_color(&self, pairs: &mut HashMap<ColorPair, i16>, pair: ColorPair) -> i16 {
+    /// Save a new color pair.
+    fn insert_color(&self, pairs: &mut HashMap<ColorPair, i16>,
+                    pair: ColorPair)
+                    -> i16 {
 
         let n = 1 + pairs.len() as i16;
         let target = if ncurses::COLOR_PAIRS() > n as i32 {
@@ -33,19 +36,26 @@ impl Concrete {
                            find_closest(&pair.back) as i16);
         target
     }
-    fn set_colorstyle(&self, pair: ColorPair) {
+
-        self.current_style.set(pair);
+    /// Checks the pair in the cache, or re-define a color if needed.
+    fn get_or_create(&self, pair: ColorPair) -> i16 {
 
         let mut pairs = self.pairs.borrow_mut();
 
         // Find if we have this color in stock
-        let i = if pairs.contains_key(&pair) {
+        if pairs.contains_key(&pair) {
             // We got it!
             pairs[&pair]
         } else {
             self.insert_color(&mut *pairs, pair)
-        };
+        }
+    }
 
+    fn set_colorstyle(&self, pair: ColorPair) {
+
+        let i = self.get_or_create(pair);
+
+        self.current_style.set(pair);
         let style = ncurses::COLOR_PAIR(i);
         ncurses::attron(style);
     }
@@ -64,8 +74,6 @@ impl backend::Backend for Concrete {
         ncurses::cbreak();
         ncurses::start_color();
         ncurses::curs_set(ncurses::CURSOR_VISIBILITY::CURSOR_INVISIBLE);
-        ncurses::wbkgd(ncurses::stdscr(),
-                       ncurses::COLOR_PAIR(color_id(ColorStyle::Background)));
 
         Concrete {
             current_style: Cell::new(ColorPair::from_256colors(0, 0)),
@@ -108,7 +116,13 @@ impl backend::Backend for Concrete {
         ncurses::attroff(style);
     }
 
-    fn clear(&self) {
+    fn clear(&self, color: Color) {
+        let id = self.get_or_create(ColorPair {
+                                        front: color,
+                                        back: color,
+                                    });
+        ncurses::wbkgd(ncurses::stdscr(), ncurses::COLOR_PAIR(id));
+
         ncurses::clear();
     }
 

src/backend/mod.rs

@@ -18,19 +18,22 @@ pub use self::termion::*;
 pub trait Backend {
     fn init() -> Self;
     // TODO: take `self` by value?
+    // Or implement Drop?
     fn finish(&mut self);
 
-    fn clear(&self);
     fn refresh(&mut self);
 
     fn has_colors(&self) -> bool;
-
-    fn print_at(&self, (usize, usize), &str);
-
-    fn poll_event(&self) -> event::Event;
-    fn set_refresh_rate(&mut self, fps: u32);
     fn screen_size(&self) -> (usize, usize);
 
+    /// Main input method
+    fn poll_event(&self) -> event::Event;
+
+    /// Main method used for printing
+    fn print_at(&self, (usize, usize), &str);
+    fn clear(&self, color: theme::Color);
+
+    fn set_refresh_rate(&mut self, fps: u32);
     // TODO: unify those into a single method?
     fn with_color<F: FnOnce()>(&self, colors: theme::ColorPair, f: F);
     fn with_effect<F: FnOnce()>(&self, effect: theme::Effect, f: F);

src/backend/termion.rs

@@ -124,8 +124,11 @@ impl backend::Backend for Concrete {
         (x as usize, y as usize)
     }
 
-    fn clear(&self) {
+    fn clear(&self, color: theme::Color) {
-        // self.apply_colorstyle(theme::ColorStyle::Background);
+        self.apply_colorstyle(theme::ColorPair {
+            front: color,
+            back: color,
+        });
         print!("{}", termion::clear::All);
     }
 

src/lib.rs

@@ -287,14 +287,14 @@ impl Cursive {
     pub fn set_theme(&mut self, theme: theme::Theme) {
         self.theme = theme;
         // self.theme.activate(&mut self.backend);
-        self.backend.clear();
+        self.clear();
     }
 
     /// Clears the screen.
     ///
     /// Users rarely have to call this directly.
     pub fn clear(&self) {
-        self.backend.clear();
+        self.backend.clear(self.theme.colors.background);
     }
 
     /// Loads a theme from the given file.
@@ -617,7 +617,7 @@ impl Cursive {
         }
 
         if event == Event::WindowResize {
-            self.backend.clear();
+            self.clear();
         }
 
         // Event dispatch order:

src/printer.rs

@@ -53,7 +53,7 @@ impl<'a> Printer<'a> {
     ///
     /// Users rarely need to call this directly.
     pub fn clear(&self) {
-        self.backend.clear();
+        self.backend.clear(self.theme.colors.background);
     }
 
     /// Returns `true` if nothing has been printed yet.