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//! Shared row rendering for graph/commit selection widgets.
/// Response returned from a head row.
pub struct HeadRowResponse {
/// Response for the row.
pub row: egui::Response,
/// The response for the delete button (only present for named rows).
pub delete: Option<egui::Response>,
}
/// The type of row being rendered.
pub enum HeadRowType<'a> {
/// A named graph (branch).
Named(&'a str),
/// An unnamed commit (addressed by timestamp).
Unnamed(&'a gantz_ca::Timestamp),
/// A base node (ships with the binary, resets on launch).
Base(&'a str),
}
/// Render a single head/commit row.
///
/// Shows the name/timestamp, CA address, open/focused indicators.
/// Returns responses for click interaction.
pub fn head_row(
open_heads: &[gantz_ca::Head],
head: &gantz_ca::Head,
row_type: HeadRowType,
row_ca: &gantz_ca::CommitAddr,
focused_head: Option<usize>,
ui: &mut egui::Ui,
) -> HeadRowResponse {
let w = ui.max_rect().width();
let h = ui.style().interaction.interact_radius;
let size = egui::Vec2::new(w, h);
let (rect, mut row) = ui.allocate_at_least(size, egui::Sense::click());
let builder = egui::UiBuilder::new()
.sense(egui::Sense::click())
.max_rect(rect);
let (res, delete) = ui
.scope_builder(builder, |ui| {
let mut res = ui.response();
let hovered = res.hovered();
// Create a child UI for the labels positioned over the allocated rect
ui.horizontal(|ui| {
let mut name = match row_type {
HeadRowType::Named(name) => name.to_string(),
HeadRowType::Unnamed(×tamp) => fmt_commit_timestamp(timestamp),
HeadRowType::Base(name) => name.to_string(),
};
// Append focus indicator if this head is focused.
if let Some(focused) = focused_head {
if crate::head_is_focused(open_heads.iter(), focused, head) {
name.push_str(" ⚫");
}
}
let mut text = egui::RichText::new(name.clone());
let is_open = open_heads.contains(head);
text = if is_open {
text.strong()
} else if hovered {
text
} else {
text.weak()
};
let label = egui::Label::new(text).selectable(false);
res |= ui.add(label);
ui.with_layout(egui::Layout::right_to_left(egui::Align::Center), |ui| {
// Show the address.
let row_ca_string = format!("{}", row_ca.display_short());
let mut text = egui::RichText::new(row_ca_string).monospace();
text = if is_open {
text.strong()
} else if hovered {
text
} else {
text.weak()
};
let label = egui::Label::new(text).selectable(false);
res |= ui.add(label);
// Show an x for removing the name mapping.
let delete = match row_type {
HeadRowType::Named(_) => {
Some(ui.add(egui::Button::new("×").frame_when_inactive(false)))
}
HeadRowType::Unnamed(_) | HeadRowType::Base(_) => None,
};
(res, delete)
})
.inner
})
.inner
})
.inner;
row |= res;
HeadRowResponse { row, delete }
}
/// Format the commit as a timestamp for listing unnamed commits.
pub fn fmt_commit_timestamp(timestamp: gantz_ca::Timestamp) -> String {
std::time::UNIX_EPOCH
.checked_add(timestamp)
.map(|system_time| crate::widget::format_local_datetime(system_time))
.unwrap_or_else(|| "<invalid-timestamp>".to_string())
}