teksilo-widgets 0.9.0

// SPDX-License-Identifier: MPL-2.0
// SPDX-FileCopyrightText: 2026 FernTech

//! Default `ToastStyle` impl driven by paint-recipe data.
//!
//! `RecipeToastStyle` ships the IntUI toast chrome: a per-severity
//! status-tinted surface (`StatusInfo` / `StatusSuccess` /
//! `StatusWarning` / `StatusError`) with rounded corners, padding,
//! a leading severity glyph, and an optional trailing close `IconButton`.
//!
//! Tokens are co-located here.
//! Apps that want a different look (full-bleed strip, frosted glass,
//! icon-free) write their own `impl ToastStyle` block. The widget
//! always builds the functional pieces (severity glyph, close button,
//! body content) — the recipe is pure chrome.

use teksilo_core::build_context::BuildContext;
use teksilo_core::color_prop::ColorProp;
use teksilo_core::styles::{ToastStyle, ToastStyleConfig};
use teksilo_core::widget_id::WidgetId;
use teksilo_tokens::{CornerRadius, VAlignment};

use crate::primitives::{Expand, HStack, Padding, RectWidget, ZStack};

/// Outer horizontal padding inside the toast surface.
pub const TOAST_PADDING_HORIZONTAL: f32 = 14.0;
/// Outer vertical padding inside the toast surface.
pub const TOAST_PADDING_VERTICAL: f32 = 12.0;
/// Rounded corner radius of the toast surface (matches IntUI
/// `radius_popup`).
pub const TOAST_CORNER_RADIUS: f32 = 8.0;
/// Diameter of the leading severity glyph (consumed by the widget, not
/// the recipe — exposed here so the widget pulls one constant).
pub const TOAST_GLYPH_SIZE: f32 = 16.0;
/// Horizontal gap between leading glyph, body column, and trailing
/// close button.
pub const TOAST_CONTENT_GAP: f32 = 12.0;
/// Vertical gap between title and body lines inside the body column.
pub const TOAST_TITLE_BODY_GAP: f32 = 2.0;
/// Vertical gap between body and action row (when actions are present).
pub const TOAST_BODY_ACTIONS_GAP: f32 = 8.0;

/// Dimension recipe for [`RecipeToastStyle`].
///
/// All fields default to the matching `TOAST_*` constants so a plain
/// `ToastRecipe::default()` reproduces the stock IntUI look. Override
/// individual fields to tune padding, gap, or corner radius without
/// writing a full custom `ToastStyle`.
#[derive(Debug, Clone, Copy, PartialEq)]
pub struct ToastRecipe {
    /// Outer horizontal padding inside the toast surface.
    pub padding_horizontal: f32,
    /// Outer vertical padding inside the toast surface.
    pub padding_vertical: f32,
    /// Rounded corner radius of the toast surface.
    pub corner_radius: f32,
    /// Diameter of the leading severity glyph.
    pub glyph_size: f32,
    /// Horizontal gap between leading glyph, body column, and trailing
    /// close button.
    pub content_gap: f32,
    /// Vertical gap between title and body lines inside the body column.
    pub title_body_gap: f32,
    /// Vertical gap between body and action row (when actions are present).
    pub body_actions_gap: f32,
}

impl Default for ToastRecipe {
    fn default() -> Self {
        Self {
            padding_horizontal: TOAST_PADDING_HORIZONTAL,
            padding_vertical: TOAST_PADDING_VERTICAL,
            corner_radius: TOAST_CORNER_RADIUS,
            glyph_size: TOAST_GLYPH_SIZE,
            content_gap: TOAST_CONTENT_GAP,
            title_body_gap: TOAST_TITLE_BODY_GAP,
            body_actions_gap: TOAST_BODY_ACTIONS_GAP,
        }
    }
}

/// Default `ToastStyle` shipped with Teksilo. Surface tint comes from
/// the per-severity `SurfaceRole`. The recipe ignores
/// `cfg.priority` — High/Urgent toasts look identical to Normal at
/// this default styling tier (apps that want a heavier shadow on
/// Urgent provide their own `impl ToastStyle`).
#[derive(Debug, Default, Clone, Copy)]
pub struct RecipeToastStyle {
    pub recipe: ToastRecipe,
}

impl RecipeToastStyle {
    pub fn new(recipe: ToastRecipe) -> Self {
        Self { recipe }
    }
}

impl ToastStyle for RecipeToastStyle {
    fn make_body(&self, cfg: &ToastStyleConfig, ctx: &mut BuildContext) -> WidgetId {
        let radius = CornerRadius::uniform(self.recipe.corner_radius);

        // Background panel — status surface tint, no border (status
        // surface tokens already encode contrast with the page bg).
        let bg = ctx.add(
            RectWidget::new()
                .background(ColorProp::SurfaceRole(cfg.severity.surface()))
                .corner_radius(radius),
        );

        // Row layout: [glyph] [body (expands)] [close?].
        let body = ctx.add(Expand::horizontal().child_id(cfg.content));
        let mut row = HStack::new()
            .spacing(self.recipe.content_gap)
            .alignment(VAlignment::Top)
            .add_child(cfg.leading_glyph)
            .add_child(body);
        if let Some(close_id) = cfg.trailing_close {
            row = row.add_child(close_id);
        }
        let row_id = ctx.add(row);
        let padded = ctx.add(
            Padding::symmetric(self.recipe.padding_vertical, self.recipe.padding_horizontal)
                .child_id(row_id),
        );

        ctx.add(ZStack::new().add_child(bg).add_child(padded))
    }
}