conf files can import other conf files

A condition on terminal's light can be set

2 files changed, 57 insertions, 3 deletions

diff --git a/src/display/luma.rs b/src/display/luma.rs
new file mode 100644
index 0000000..27bf877
--- /dev/null
+++ b/src/display/luma.rs
@@ -0,0 +1,52 @@
+pub use {
+    once_cell::sync::Lazy,
+    serde::Deserialize,
+};
+
+#[derive(Debug, Clone, Copy, Deserialize, PartialEq)]
+#[serde(rename_all = "lowercase")]
+pub enum Luma {
+    Light,
+    Unknown,
+    Dark,
+}
+
+/// Return the light of the terminal background, which is a value
+/// between 0 (black) and 1 (white).
+pub fn luma() -> &'static Result<f32, terminal_light::TlError> {
+    static LUMA: Lazy<Result<f32, terminal_light::TlError>> = Lazy::new(|| {
+        let luma = time!(Debug, terminal_light::luma());
+        info!("terminal's luma: {:?}", &luma);
+        luma
+    });
+    &*LUMA
+}
+
+impl Luma {
+    pub fn read() -> Self {
+        match luma() {
+            Ok(luma) if *luma > 0.6 => Self::Light,
+            Ok(_) => Self::Dark,
+            _ => Self::Unknown,
+        }
+    }
+}
+
+#[derive(Clone, Debug, Deserialize)]
+#[serde(untagged)]
+pub enum LumaCondition {
+    Simple(Luma),
+    Array(Vec<Luma>),
+}
+
+impl LumaCondition {
+    pub fn is_verified(&self) -> bool {
+        self.includes(Luma::read())
+    }
+    pub fn includes(&self, other: Luma) -> bool {
+        match self {
+            Self::Simple(luma) => other == *luma,
+            Self::Array(arr) => arr.contains(&other),
+        }
+    }
+}
diff --git a/src/display/mod.rs b/src/display/mod.rs
index 702aa90..a9eceff 100644
--- a/src/display/mod.rs
+++ b/src/display/mod.rs
@@ -22,15 +22,16 @@ macro_rules! cond_bg {
 }
 
 mod areas;
+mod cell_size;
 mod col;
 mod displayable_tree;
-mod git_status_display;
 pub mod flags_display;
-pub mod status_line;
+mod git_status_display;
+mod luma;
 mod matched_string;
 mod num_format;
 mod screen;
-mod cell_size;
+pub mod status_line;
 
 #[cfg(not(any(target_family="windows",target_os="android")))]
 mod permissions;
@@ -41,6 +42,7 @@ pub use {
     cond_bg,
     displayable_tree::DisplayableTree,
     git_status_display::GitStatusDisplay,
+    luma::*,
     matched_string::MatchedString,
     screen::Screen,
     cell_size::*,