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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//! `Stepper` — a horizontal progress indicator across ordered steps.

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

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

struct StepDef {
  label: SharedString,
  description: Option<SharedString>,
}

/// A horizontal stepper. `active` is the current step
/// index; earlier steps render as completed.
#[derive(IntoElement)]
pub struct Stepper {
  steps: Vec<StepDef>,
  active: usize,
  color: ColorName,
}

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

  pub fn step(mut self, label: impl Into<SharedString>) -> Self {
    self.steps.push(StepDef {
      label: label.into(),
      description: None,
    });
    self
  }

  pub fn step_desc(
    mut self,
    label: impl Into<SharedString>,
    description: impl Into<SharedString>,
  ) -> Self {
    self.steps.push(StepDef {
      label: label.into(),
      description: Some(description.into()),
    });
    self
  }

  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 Stepper {
  fn default() -> Self {
    Stepper::new()
  }
}

impl RenderOnce for Stepper {
  fn render(self, _window: &mut Window, cx: &mut App) -> impl IntoElement {
    let t = theme(cx);
    let accent = t.color(self.color, t.primary_shade());
    let accent_hsla = accent.hsla();
    let on_accent = accent.contrasting().hsla();
    let line = t.border().hsla();
    let text = t.text().hsla();
    let dimmed = t.dimmed().hsla();
    let surface = t.surface().hsla();
    let font = t.font_size(Size::Sm);
    let font_xs = t.font_size(Size::Xs);
    let active = self.active;
    let count = self.steps.len();

    let mut row = div().flex().items_center().gap(px(8.0));
    for (i, step) in self.steps.into_iter().enumerate() {
      let completed = i < active;
      let is_active = i == active;
      let filled = completed || is_active;

      let circle = {
        let base = div()
          .w(px(30.0))
          .h(px(30.0))
          .flex()
          .items_center()
          .justify_center()
          .rounded(px(30.0))
          .text_size(px(font))
          .font_weight(FontWeight::SEMIBOLD);
        if filled {
          let label = if completed {
            SharedString::new_static("\u{2713}")
          } else {
            SharedString::from((i + 1).to_string())
          };
          base.bg(accent_hsla).text_color(on_accent).child(label)
        } else {
          base
            .bg(surface)
            .border_1()
            .border_color(line)
            .text_color(dimmed)
            .child(SharedString::from((i + 1).to_string()))
        }
      };

      let mut labels = div().flex().flex_col().gap(px(1.0)).child(
        div()
          .text_size(px(font))
          .font_weight(FontWeight::MEDIUM)
          .text_color(if filled { text } else { dimmed })
          .child(step.label),
      );
      if let Some(description) = step.description {
        labels = labels.child(
          div()
            .text_size(px(font_xs))
            .text_color(dimmed)
            .child(description),
        );
      }

      row = row.child(
        div()
          .flex()
          .items_center()
          .gap(px(8.0))
          .child(circle)
          .child(labels),
      );

      if i + 1 < count {
        row = row.child(
          div()
            .flex_1()
            .min_w(px(24.0))
            .h(px(2.0))
            .rounded(px(1.0))
            .bg(if completed { accent_hsla } else { line }),
        );
      }
    }
    row.probe("Stepper")
  }
}