refactor: move custom theme into its separate crate

1 files changed, 229 insertions, 0 deletions

diff --git a/material_theme/src/lib.rs b/material_theme/src/lib.rs
new file mode 100644
index 0000000..6641b74
--- /dev/null
+++ b/material_theme/src/lib.rs
@@ -0,0 +1,229 @@
+use std::sync::LazyLock;
+
+use iced_widget::core::Color;
+use iced_widget::core::theme::{Base, Style};
+use serde::Deserialize;
+
+pub mod button;
+pub mod container;
+pub mod text;
+pub mod utils;
+
+const DARK_THEME_CONTENT: &str = include_str!("../assets/themes/dark.toml");
+const LIGHT_THEME_CONTENT: &str = include_str!("../assets/themes/light.toml");
+
+#[derive(Debug, PartialEq, Deserialize)]
+pub struct Theme {
+    pub name: String,
+    #[serde(flatten)]
+    pub colorscheme: ColorScheme,
+}
+
+impl Theme {
+    pub fn new(name: impl Into<String>, colorscheme: ColorScheme) -> Self {
+        Self {
+            name: name.into(),
+            colorscheme,
+        }
+    }
+}
+
+impl Clone for Theme {
+    fn clone(&self) -> Self {
+        Self {
+            name: self.name.clone(),
+            colorscheme: self.colorscheme,
+        }
+    }
+
+    fn clone_from(&mut self, source: &Self) {
+        self.name = source.name.clone();
+        self.colorscheme = source.colorscheme;
+    }
+}
+
+impl Default for Theme {
+    fn default() -> Self {
+        match dark_light::detect().unwrap_or(dark_light::Mode::Unspecified) {
+            dark_light::Mode::Dark | dark_light::Mode::Unspecified => {
+                DARK.clone()
+            }
+            dark_light::Mode::Light => LIGHT.clone(),
+        }
+    }
+}
+
+impl Base for Theme {
+    fn base(&self) -> Style {
+        Style {
+            background_color: self.colorscheme.surface.color,
+            text_color: self.colorscheme.surface.on_surface,
+        }
+    }
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Deserialize)]
+pub struct ColorScheme {
+    pub primary: Primary,
+    pub secondary: Secondary,
+    pub tertiary: Tertiary,
+    pub error: Error,
+    pub surface: Surface,
+    pub inverse: Inverse,
+    pub outline: Outline,
+    #[serde(with = "color_serde")]
+    pub shadow: Color,
+}
+
+pub static DARK: LazyLock<Theme> = LazyLock::new(|| {
+    toml::from_str(DARK_THEME_CONTENT).expect("parse dark theme")
+});
+
+pub static LIGHT: LazyLock<Theme> = LazyLock::new(|| {
+    toml::from_str(LIGHT_THEME_CONTENT).expect("parse light theme")
+});
+
+#[derive(Debug, Clone, Copy, PartialEq, Deserialize)]
+pub struct Primary {
+    #[serde(with = "color_serde")]
+    pub color: Color,
+    #[serde(with = "color_serde")]
+    pub on_primary: Color,
+    #[serde(with = "color_serde")]
+    pub primary_container: Color,
+    #[serde(with = "color_serde")]
+    pub on_primary_container: Color,
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Deserialize)]
+pub struct Secondary {
+    #[serde(with = "color_serde")]
+    pub color: Color,
+    #[serde(with = "color_serde")]
+    pub on_secondary: Color,
+    #[serde(with = "color_serde")]
+    pub secondary_container: Color,
+    #[serde(with = "color_serde")]
+    pub on_secondary_container: Color,
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Deserialize)]
+pub struct Tertiary {
+    #[serde(with = "color_serde")]
+    pub color: Color,
+    #[serde(with = "color_serde")]
+    pub on_tertiary: Color,
+    #[serde(with = "color_serde")]
+    pub tertiary_container: Color,
+    #[serde(with = "color_serde")]
+    pub on_tertiary_container: Color,
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Deserialize)]
+pub struct Error {
+    #[serde(with = "color_serde")]
+    pub color: Color,
+    #[serde(with = "color_serde")]
+    pub on_error: Color,
+    #[serde(with = "color_serde")]
+    pub error_container: Color,
+    #[serde(with = "color_serde")]
+    pub on_error_container: Color,
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Deserialize)]
+pub struct Surface {
+    #[serde(with = "color_serde")]
+    pub color: Color,
+    #[serde(with = "color_serde")]
+    pub on_surface: Color,
+    #[serde(with = "color_serde")]
+    pub on_surface_variant: Color,
+    pub surface_container: SurfaceContainer,
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Deserialize)]
+pub struct SurfaceContainer {
+    #[serde(with = "color_serde")]
+    pub lowest: Color,
+    #[serde(with = "color_serde")]
+    pub low: Color,
+    #[serde(with = "color_serde")]
+    pub base: Color,
+    #[serde(with = "color_serde")]
+    pub high: Color,
+    #[serde(with = "color_serde")]
+    pub highest: Color,
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Deserialize)]
+pub struct Inverse {
+    #[serde(with = "color_serde")]
+    pub inverse_surface: Color,
+    #[serde(with = "color_serde")]
+    pub inverse_on_surface: Color,
+    #[serde(with = "color_serde")]
+    pub inverse_primary: Color,
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Deserialize)]
+pub struct Outline {
+    #[serde(with = "color_serde")]
+    pub color: Color,
+    #[serde(with = "color_serde")]
+    pub variant: Color,
+}
+
+pub fn parse_argb(s: &str) -> Option<Color> {
+    let hex = s.strip_prefix('#').unwrap_or(s);
+
+    let parse_channel = |from: usize, to: usize| {
+        let num =
+            usize::from_str_radix(&hex[from..=to], 16).ok()? as f32 / 255.0;
+
+        // If we only got half a byte (one letter), expand it into a full byte (two letters)
+        Some(if from == to { num + num * 16.0 } else { num })
+    };
+
+    Some(match hex.len() {
+        3 => Color::from_rgb(
+            parse_channel(0, 0)?,
+            parse_channel(1, 1)?,
+            parse_channel(2, 2)?,
+        ),
+        4 => Color::from_rgba(
+            parse_channel(1, 1)?,
+            parse_channel(2, 2)?,
+            parse_channel(3, 3)?,
+            parse_channel(0, 0)?,
+        ),
+        6 => Color::from_rgb(
+            parse_channel(0, 1)?,
+            parse_channel(2, 3)?,
+            parse_channel(4, 5)?,
+        ),
+        8 => Color::from_rgba(
+            parse_channel(2, 3)?,
+            parse_channel(4, 5)?,
+            parse_channel(6, 7)?,
+            parse_channel(0, 1)?,
+        ),
+        _ => None?,
+    })
+}
+
+mod color_serde {
+    use iced_widget::core::Color;
+    use serde::{Deserialize, Deserializer};
+
+    use super::parse_argb;
+
+    pub fn deserialize<'de, D>(deserializer: D) -> Result<Color, D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        Ok(String::deserialize(deserializer)
+            .map(|hex| parse_argb(&hex))?
+            .unwrap_or(Color::TRANSPARENT))
+    }
+}