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small gleam coding and persistent agent daemon with a detachable cli and a canvas ui forked from okami.mom/albedo
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123456789101112131415161718192021222324252627282930import stringWidth from "string-width"import type { ToolProgress } from "../client.js"
export type CodeLine = { callId: string width: number source: { offset: number; text: string } line: string}const graphemes = new Intl.Segmenter(undefined, { granularity: "grapheme" })
/** A typewriter row: fill, clear on overflow, continue. No wrapping or scrollback. */export function advanceCodeLine(current: CodeLine | null, progress: ToolProgress | null, width: number): CodeLine | null { const source = progress?.phase === "generating" ? progress.code : undefined if (!source || !progress || width < 1) return null const same = current?.callId === progress.callId && current.width === width if (same && current.source.offset === source.offset && current.source.text === source.text) return current const end = same ? current.source.offset + current.source.text.length : 0 const shared = same ? Math.max(current.source.offset, source.offset) : 0 const continued = same && source.offset <= end && source.offset + source.text.length > end && source.text.slice(shared - source.offset, end - source.offset) === current.source.text.slice(shared - current.source.offset) let line = continued ? current.line : "" const delta = source.text.slice(continued ? end - source.offset : 0).replace(/[\p{Cc}\p{Cf}]/gu, " ") for (const { segment } of graphemes.segment(delta)) { if (stringWidth(line + segment) > width) line = "" if (stringWidth(segment) <= width) line += segment } return { callId: progress.callId, width, source, line }}