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import Foundation
import RegexBuilder
import SwiftUI
/// A thin wrapper around a single text line captured
/// by a block.
///
/// When a block executes the command it captures stdout
/// and splits each line into a cell. Each cell is then
/// laid out horizontally respecting the order.
///
/// Besides the underlying text value, a cell holds an
/// highlight level (as Int) that, if true, applies the
/// special background color defined in `Config.swift`.
/// You can set the highlight at runtime by prefixing the
/// text line with the special notation `&!<level>`, where
/// `<level>` is a positive integer that can be used as an
/// index to pick an highlight (count starts from 1).
///
/// E.g: `echo "&!1 $(date "+%a %d, %H:%M:%S") "`
///
/// Highlight colors can have multiple use cases, but they
/// were imagined specifically for distinguishing cells
/// within a group. For example when you want to show
/// window manager workspaces and which one is active.
struct Cell: RawRepresentable, Identifiable {
/// Stable identity for SwiftUI diffing.
let id = UUID()
/// The represented text content.
let rawValue: String
/// The highlight level of the cell.
let highlight: Int
/// The background color derived from the highlight level.
///
/// Returns the `Config.highlights` color at the same index
/// if present, otherwise `.clear` so the underlying bar
/// background shows through.
var background: Color {
guard highlight != 0 && highlight <= Config.highlights.count else { return .clear }
return Config.highlights[highlight - 1]
}
init(rawValue: String) {
let pattern = Regex {
Optionally {
"&!"
Capture { OneOrMore(.digit) }
}
Capture { OneOrMore(.any) }
}
guard let match = rawValue.firstMatch(of: pattern) else {
self.rawValue = rawValue
self.highlight = 0
return
}
if let rawHighlight = match.output.1, let highlight = Int(String(rawHighlight)) {
self.highlight = highlight
} else {
self.highlight = 0
}
self.rawValue = String(match.output.2)
}
}
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