guise-ui 1.5.2

A component library for gpui, Zed's GPU-accelerated UI framework: a themed palette, sizing tokens, 130+ composable components, a reactive state layer, and an in-app Safari-style inspector.
Documentation 
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//! `Timeline` — a vertical sequence of events with bullets and connectors.

use gpui::prelude::*;
use gpui::{div, px, App, FontWeight, IntoElement, SharedString, Window};

use crate::devtools::Probed;
use crate::theme::{theme, ColorName, Size};

struct Item {
  title: SharedString,
  description: Option<SharedString>,
}

/// A vertical timeline. Items up to and including `active` are highlighted.
#[derive(IntoElement)]
pub struct Timeline {
  items: Vec<Item>,
  active: usize,
  color: ColorName,
}

impl Timeline {
  pub fn new() -> Self {
    Timeline {
      items: Vec::new(),
      active: 0,
      color: ColorName::Blue,
    }
  }

  pub fn item(mut self, title: impl Into<SharedString>) -> Self {
    self.items.push(Item {
      title: title.into(),
      description: None,
    });
    self
  }

  pub fn item_desc(
    mut self,
    title: impl Into<SharedString>,
    description: impl Into<SharedString>,
  ) -> Self {
    self.items.push(Item {
      title: title.into(),
      description: Some(description.into()),
    });
    self
  }

  /// Index of the last highlighted item.
  pub fn active(mut self, active: usize) -> Self {
    self.active = active;
    self
  }

  pub fn color(mut self, color: ColorName) -> Self {
    self.color = color;
    self
  }
}

impl Default for Timeline {
  fn default() -> Self {
    Timeline::new()
  }
}

impl RenderOnce for Timeline {
  fn render(self, _window: &mut Window, cx: &mut App) -> impl IntoElement {
    let t = theme(cx);
    let accent = t.color(self.color, t.primary_shade()).hsla();
    let border = t.border().hsla();
    let surface = t.surface().hsla();
    let text = t.text().hsla();
    let dimmed = t.dimmed().hsla();
    let font = t.font_size(Size::Sm);
    let last = self.items.len().saturating_sub(1);

    let mut column = div().flex().flex_col();
    for (i, item) in self.items.iter().enumerate() {
      let reached = i <= self.active;
      let connector_done = i < self.active;

      let mut rail = div().flex().flex_col().items_center().w(px(20.0));
      let mut dot = div().w(px(14.0)).h(px(14.0)).rounded(px(7.0));
      dot = if reached {
        dot.bg(accent)
      } else {
        dot.bg(surface).border_1().border_color(border)
      };
      rail = rail.child(dot);
      if i != last {
        rail = rail.child(
          div()
            .w(px(2.0))
            .flex_grow()
            .min_h(px(12.0))
            .bg(if connector_done { accent } else { border }),
        );
      }

      let mut content = div()
        .flex()
        .flex_col()
        .gap(px(2.0))
        .pb(px(if i == last { 0.0 } else { 18.0 }))
        .child(
          div()
            .font_weight(FontWeight::SEMIBOLD)
            .text_size(px(font))
            .text_color(text)
            .child(item.title.clone()),
        );
      if let Some(description) = item.description.clone() {
        content = content.child(
          div()
            .text_size(px(t.font_size(Size::Xs)))
            .text_color(dimmed)
            .child(description),
        );
      }

      column = column.child(div().flex().gap(px(10.0)).child(rail).child(content));
    }
    column.probe("Timeline")
  }
}