Mostly add pancurses support. Test pancurses support on Travis

.travis.yml

@@ -3,3 +3,9 @@ cache: cargo
 rust:
     - stable
     - nightly
+script:
+    - cargo build --verbose
+    - cargo test --verbose
+    -
+    - cargo build --verbose --features=pancurses --no-default-features
+    - cargo test --verbose --features=pancurses --no-default-features

Cargo.toml

@@ -14,6 +14,12 @@ version = "0.3.1"
 [build-dependencies]
 skeptic = "0.6"
 
+[features]
+cursive_ncurses = ["ncurses"]
+cursive_pancurses = ["pancurses"]
+cursive_termion = ["termion"]
+default = ["cursive_ncurses"]
+
 [dependencies]
 odds = "0.2"
 toml = "0.2"
@@ -21,20 +27,22 @@ unicode-segmentation = "0.1"
 unicode-width = "0.1"
 
 [dependencies.ncurses]
+version = "5.83.0"
 features = ["wide"]
 optional = true
 version = "5.83.0"
 
-[dependencies.termion]
+[dependencies.pancurses]
+version = "0.3.0"
 optional = true
+
+[dependencies.termion]
 version = "1.1.1"
+optional = true
 
 [dev-dependencies]
 rand = "0.3"
 skeptic = "0.6"
 
-[features]
-default = ["ncurses"]
-
 [lib]
 name = "cursive"

src/backend/curses/mod.rs

@@ -0,0 +1,40 @@
+use theme::{BaseColor, Color};
+
+#[cfg(feature = "cursive_ncurses")]
+mod n;
+#[cfg(feature = "cursive_ncurses")]
+pub use self::n::*;
+
+#[cfg(feature = "cursive_pancurses")]
+mod pan;
+#[cfg(feature = "cursive_pancurses")]
+pub use self::pan::*;
+
+
+fn find_closest(color: &Color) -> u8 {
+    match *color {
+        Color::Dark(BaseColor::Black) => 0,
+        Color::Dark(BaseColor::Red) => 1,
+        Color::Dark(BaseColor::Green) => 2,
+        Color::Dark(BaseColor::Yellow) => 3,
+        Color::Dark(BaseColor::Blue) => 4,
+        Color::Dark(BaseColor::Magenta) => 5,
+        Color::Dark(BaseColor::Cyan) => 6,
+        Color::Dark(BaseColor::White) => 7,
+        Color::Light(BaseColor::Black) => 8,
+        Color::Light(BaseColor::Red) => 9,
+        Color::Light(BaseColor::Green) => 10,
+        Color::Light(BaseColor::Yellow) => 11,
+        Color::Light(BaseColor::Blue) => 12,
+        Color::Light(BaseColor::Magenta) => 13,
+        Color::Light(BaseColor::Cyan) => 14,
+        Color::Light(BaseColor::White) => 15,
+        Color::Rgb(r, g, b) => {
+            let r = 6 * r as u16 / 256;
+            let g = 6 * g as u16 / 256;
+            let b = 6 * b as u16 / 256;
+            (16 + 36 * r + 6 * g + b) as u8
+        }
+        Color::RgbLowRes(r, g, b) => (16 + 36 * r + 6 * g + b) as u8,
+    }
+}

src/backend/curses/n.rs

@@ -105,7 +105,6 @@ impl backend::Backend for NcursesBackend {
 
 /// Returns the Key enum corresponding to the given ncurses event.
 fn parse_ncurses_char(ch: i32) -> Event {
-
     match ch {
         // Value sent by ncurses when nothing happens
         -1 => Event::Refresh,

src/backend/curses/pan.rs

@@ -0,0 +1,221 @@
+use backend;
+use event::{Event, Key};
+
+use pancurses;
+use self::super::find_closest;
+use theme::{BaseColor, Color, ColorStyle, Effect};
+use utf8;
+
+pub struct PancursesBackend {
+    window: pancurses::Window,
+}
+
+impl backend::Backend for PancursesBackend {
+    fn init() -> Self {
+        ::std::env::set_var("ESCDELAY", "25");
+        let window = pancurses::initscr();
+        window.keypad(true);
+        pancurses::noecho();
+        pancurses::cbreak();
+        pancurses::start_color();
+        pancurses::curs_set(0);
+        window.bkgd(pancurses::COLOR_PAIR(ColorStyle::Background.id() as u64));
+
+        PancursesBackend { window: window }
+    }
+
+    fn screen_size(&self) -> (usize, usize) {
+        let (x, y) = self.window.get_max_yx();
+        (x as usize, y as usize)
+    }
+
+    fn has_colors(&self) -> bool {
+        pancurses::has_colors()
+    }
+
+    fn finish(&mut self) {
+        pancurses::endwin();
+    }
+
+    fn init_color_style(&mut self, style: ColorStyle, foreground: &Color,
+                        background: &Color) {
+        pancurses::init_pair(style.id(),
+                             find_closest(foreground) as i16,
+                             find_closest(background) as i16);
+    }
+
+    fn with_color<F: FnOnce()>(&self, color: ColorStyle, f: F) {
+        // TODO: pancurses doesn't have an `attr_get` equivalent
+        // let mut current_style: pancurses::attr_t = 0;
+        // let mut current_color: i16 = 0;
+        // pancurses::attr_get(&mut current_style, &mut current_color);
+
+        let style = pancurses::COLOR_PAIR(color.id() as u64);
+        self.window.attron(style);
+        f();
+        self.window.attroff(style);
+        // pancurses::attron(current_style);
+    }
+
+    fn with_effect<F: FnOnce()>(&self, effect: Effect, f: F) {
+        let style = match effect {
+            // A_REVERSE, taken from ncurses
+            Effect::Reverse => 1 << (10 + 8u32),
+            Effect::Simple => pancurses::A_NORMAL,
+        };
+        self.window.attron(style);
+        f();
+        self.window.attroff(style);
+    }
+
+    fn clear(&self) {
+        self.window.clear();
+    }
+
+    fn refresh(&self) {
+        self.window.refresh();
+    }
+
+    fn print_at(&self, (x, y): (usize, usize), text: &str) {
+        self.window.mvaddstr(y as i32, x as i32, text);
+    }
+
+    fn poll_event(&self) -> Event {
+        // TODO: there seems to not be any indication
+        // of Ctrl/Alt/Shift in these :v
+        if let Some(ev) = self.window.getch() {
+            match ev {
+                pancurses::Input::Character(c) => Event::Char(c),
+                pancurses::Input::Unknown(i) => Event::Unknown(i),
+                // TODO: I honestly have no fucking idea what KeyCodeYes is
+                pancurses::Input::KeyCodeYes => Event::Refresh,
+                // TODO: There seems to not be a Key::Break??
+                pancurses::Input::KeyBreak => Event::Refresh,
+                pancurses::Input::KeyDown => Event::Key(Key::Down),
+                pancurses::Input::KeyUp => Event::Key(Key::Up),
+                pancurses::Input::KeyLeft => Event::Key(Key::Left),
+                pancurses::Input::KeyRight => Event::Key(Key::Right),
+                pancurses::Input::KeyHome => Event::Key(Key::Home),
+                pancurses::Input::KeyBackspace => Event::Key(Key::Backspace),
+                // TODO: there seems to not be an F0 key for some reason?
+                pancurses::Input::KeyF0 => Event::Refresh,
+                pancurses::Input::KeyF1 => Event::Key(Key::F1),
+                pancurses::Input::KeyF2 => Event::Key(Key::F2),
+                pancurses::Input::KeyF3 => Event::Key(Key::F3),
+                pancurses::Input::KeyF4 => Event::Key(Key::F4),
+                pancurses::Input::KeyF5 => Event::Key(Key::F5),
+                pancurses::Input::KeyF6 => Event::Key(Key::F6),
+                pancurses::Input::KeyF7 => Event::Key(Key::F7),
+                pancurses::Input::KeyF8 => Event::Key(Key::F8),
+                pancurses::Input::KeyF9 => Event::Key(Key::F9),
+                pancurses::Input::KeyF10 => Event::Key(Key::F10),
+                pancurses::Input::KeyF11 => Event::Key(Key::F11),
+                pancurses::Input::KeyF12 => Event::Key(Key::F12),
+                // TODO: there seems to not be any F-keys above F15
+                // for some reason?
+                pancurses::Input::KeyF13 => Event::Refresh,
+                pancurses::Input::KeyF14 => Event::Refresh,
+                pancurses::Input::KeyF15 => Event::Refresh,
+                // TODO: not sure what those are
+                pancurses::Input::KeyDL => Event::Refresh,
+                pancurses::Input::KeyIL => Event::Refresh,
+                pancurses::Input::KeyDC => Event::Refresh,
+                pancurses::Input::KeyIC => Event::Refresh,
+                pancurses::Input::KeyEIC => Event::Refresh,
+                pancurses::Input::KeyClear => Event::Refresh,
+                pancurses::Input::KeyEOS => Event::Refresh,
+                pancurses::Input::KeyEOL => Event::Refresh,
+                pancurses::Input::KeySF => Event::Refresh,
+                pancurses::Input::KeySR => Event::Refresh,
+                pancurses::Input::KeyNPage => Event::Refresh,
+                pancurses::Input::KeyPPage => Event::Refresh,
+                // TODO: no way to handle this
+                pancurses::Input::KeySTab => Event::Refresh,
+                pancurses::Input::KeyCTab => Event::CtrlChar('\t'),
+                pancurses::Input::KeyCATab => Event::Refresh,
+                pancurses::Input::KeyEnter => Event::Key(Key::Enter),
+                // TODO: not sure what those are
+                pancurses::Input::KeySReset => Event::Refresh,
+                pancurses::Input::KeyReset => Event::Refresh,
+                pancurses::Input::KeyPrint => Event::Refresh,
+                pancurses::Input::KeyLL => Event::Refresh,
+                pancurses::Input::KeyAbort => Event::Refresh,
+                pancurses::Input::KeySHelp => Event::Refresh,
+                pancurses::Input::KeyLHelp => Event::Refresh,
+                pancurses::Input::KeyBTab => Event::Refresh,
+                pancurses::Input::KeyBeg => Event::Refresh,
+                pancurses::Input::KeyCancel => Event::Refresh,
+                pancurses::Input::KeyClose => Event::Refresh,
+                pancurses::Input::KeyCommand => Event::Refresh,
+                pancurses::Input::KeyCopy => Event::Refresh,
+                pancurses::Input::KeyCreate => Event::Refresh,
+                pancurses::Input::KeyEnd => Event::Refresh,
+                pancurses::Input::KeyExit => Event::Refresh,
+                pancurses::Input::KeyFind => Event::Refresh,
+                pancurses::Input::KeyHelp => Event::Refresh,
+                pancurses::Input::KeyMark => Event::Refresh,
+                pancurses::Input::KeyMessage => Event::Refresh,
+                pancurses::Input::KeyMove => Event::Refresh,
+                pancurses::Input::KeyNext => Event::Refresh,
+                pancurses::Input::KeyOpen => Event::Refresh,
+                pancurses::Input::KeyOptions => Event::Refresh,
+                pancurses::Input::KeyPrevious => Event::Refresh,
+                pancurses::Input::KeyRedo => Event::Refresh,
+                pancurses::Input::KeyReference => Event::Refresh,
+                pancurses::Input::KeyRefresh => Event::Refresh,
+                pancurses::Input::KeyReplace => Event::Refresh,
+                pancurses::Input::KeyRestart => Event::Refresh,
+                pancurses::Input::KeyResume => Event::Refresh,
+                pancurses::Input::KeySave => Event::Refresh,
+                pancurses::Input::KeySBeg => Event::Refresh,
+                pancurses::Input::KeySCancel => Event::Refresh,
+                pancurses::Input::KeySCommand => Event::Refresh,
+                pancurses::Input::KeySCopy => Event::Refresh,
+                pancurses::Input::KeySCreate => Event::Refresh,
+                pancurses::Input::KeySDC => Event::Refresh,
+                pancurses::Input::KeySDL => Event::Refresh,
+                pancurses::Input::KeySelect => Event::Refresh,
+                pancurses::Input::KeySEnd => Event::Refresh,
+                pancurses::Input::KeySEOL => Event::Refresh,
+                pancurses::Input::KeySExit => Event::Refresh,
+                pancurses::Input::KeySFind => Event::Refresh,
+                pancurses::Input::KeySHome => Event::Refresh,
+                pancurses::Input::KeySIC => Event::Refresh,
+                pancurses::Input::KeySLeft => Event::Refresh,
+                pancurses::Input::KeySMessage => Event::Refresh,
+                pancurses::Input::KeySMove => Event::Refresh,
+                pancurses::Input::KeySNext => Event::Refresh,
+                pancurses::Input::KeySOptions => Event::Refresh,
+                pancurses::Input::KeySPrevious => Event::Refresh,
+                pancurses::Input::KeySPrint => Event::Refresh,
+                pancurses::Input::KeySRedo => Event::Refresh,
+                pancurses::Input::KeySReplace => Event::Refresh,
+                pancurses::Input::KeySRight => Event::Refresh,
+                pancurses::Input::KeySResume => Event::Refresh,
+                pancurses::Input::KeySSave => Event::Refresh,
+                pancurses::Input::KeySSuspend => Event::Refresh,
+                pancurses::Input::KeySUndo => Event::Refresh,
+                pancurses::Input::KeySuspend => Event::Refresh,
+                pancurses::Input::KeyUndo => Event::Refresh,
+                pancurses::Input::KeyResize => Event::Refresh,
+                pancurses::Input::KeyEvent => Event::Refresh,
+                // TODO: not sure how to handle this
+                pancurses::Input::KeyMouse => Event::Refresh,
+                // TODO: not sure what those are
+                pancurses::Input::KeyA1 => Event::Refresh,
+                pancurses::Input::KeyA3 => Event::Refresh,
+                pancurses::Input::KeyB2 => Event::Refresh,
+                pancurses::Input::KeyC1 => Event::Refresh,
+                pancurses::Input::KeyC3 => Event::Refresh,
+            }
+        }
+    }
+
+    fn set_refresh_rate(&mut self, fps: u32) {
+        if fps == 0 {
+            self.window.timeout(-1);
+        } else {
+            self.window.timeout(1000 / fps as i32);
+        }
+    }
+}

src/backend/mod.rs

@@ -1,11 +1,13 @@
 use event;
 use theme;
 
-// Module is not named `ncurses` to avoir naming conflict
+#[cfg(feature = "cursive_termion")]
-#[cfg(feature = "ncurses")]
+mod termion;
-pub mod curses;
+mod curses;
-#[cfg(feature = "termion")]
+
-pub mod termion;
+pub use self::curses::*;
+#[cfg(feature = "cursive_termion")]
+pub use self::termion::*;
 
 pub trait Backend {
     fn init() -> Self;

src/lib.rs

@@ -56,11 +56,12 @@
 //! and log to it instead of stdout.
 #![deny(missing_docs)]
 
-#[cfg(feature = "ncurses")]
+#[cfg(feature = "cursive_ncurses")]
 extern crate ncurses;
-#[cfg(feature = "termion")]
+#[cfg(feature = "cursive_pancurses")]
+extern crate pancurses;
+#[cfg(feature = "cursive_termion")]
 extern crate termion;
-
 extern crate toml;
 extern crate unicode_segmentation;
 extern crate unicode_width;
@@ -109,7 +110,7 @@ mod utf8;
 mod backend;
 
 
-use backend::{Backend};
+use backend::Backend;
 
 use event::{Callback, Event, EventResult};
 
@@ -156,18 +157,18 @@ pub struct Cursive {
 
 new_default!(Cursive);
 
-// Use the Ncurses backend.
-// TODO: make this feature-driven
-#[cfg(feature = "termion")]
 #[doc(hidden)]
-pub type B = backend::termion::TermionBackend;
+#[cfg(feature = "cursive_ncurses")]
-
+pub type B = backend::NcursesBackend;
 #[doc(hidden)]
-#[cfg(feature = "ncurses")]
+#[cfg(feature = "cursive_pancurses")]
-pub type B = backend::curses::NcursesBackend;
+pub type B = backend::PancursesBackend;
+#[doc(hidden)]
+#[cfg(feature = "cursive_termion")]
+pub type B = backend::TermionBackend;
 
 impl Cursive {
-    /// Creates a new Cursive root, and initialize ncurses.
+    /// Creates a new Cursive root, and initialize the back-end.
     pub fn new() -> Self {
         // Default delay is way too long. 25 is imperceptible yet works fine.
         let mut backend = B::init();