| 1 | import { useMemo, useState } from "react"; |
| 2 | import { Check, Copy, ChevronDown, ChevronRight } from "lucide-react"; |
| 3 | import { diffLines, type DiffRow } from "../lib/diff"; |
| 4 | |
| 5 | // InlineDiff is a compact, expandable diff view for tool results that |
| 6 | // showed a before/after pair (Edit, MultiEdit, sed-style bash). It |
| 7 | // renders the unified diff from lib/diff's diffLines() and folds at |
| 8 | // 12 visible rows by default — clicking the row count expands the |
| 9 | // full output, and the "Copy diff" button copies a plain-text unified |
| 10 | // diff (without line numbers, which most clipboard targets don't |
| 11 | // parse) to the clipboard. |
| 12 | // |
| 13 | // The diff seam is a pure function: this component is the only |
| 14 | // place that needs to know about row layout, expansion state, and |
| 15 | // clipboard. A future migration to a real editor (Monaco/CodeMirror |
| 16 | // merge) would replace this file and leave the call sites in |
| 17 | // ToolCard untouched. |
| 18 | export function InlineDiff({ |
| 19 | before, |
| 20 | after, |
| 21 | filename, |
| 22 | maxRows = 12, |
| 23 | }: { |
| 24 | before: string; |
| 25 | after: string; |
| 26 | filename?: string; |
| 27 | maxRows?: number; |
| 28 | }) { |
| 29 | const rows = useMemo(() => diffLines(before, after), [before, after]); |
| 30 | const [open, setOpen] = useState(false); |
| 31 | const [copied, setCopied] = useState(false); |
| 32 | |
| 33 | const visible = open ? rows : rows.slice(0, maxRows); |
| 34 | const hidden = rows.length - visible.length; |
| 35 | |
| 36 | const addCount = rows.filter((r) => r.type === "add").length; |
| 37 | const delCount = rows.filter((r) => r.type === "del").length; |
| 38 | |
| 39 | const copy = async () => { |
| 40 | const text = rows.map((r) => (r.type === "add" ? "+ " : r.type === "del" ? "- " : " ") + r.text).join("\n"); |
| 41 | try { |
| 42 | await navigator.clipboard.writeText(text); |
| 43 | setCopied(true); |
| 44 | setTimeout(() => setCopied(false), 1200); |
| 45 | } catch { |
| 46 | /* clipboard unavailable */ |
| 47 | } |
| 48 | }; |
| 49 | |
| 50 | return ( |
| 51 | <div className="inline-diff"> |
| 52 | <header className="inline-diff__head"> |
| 53 | <span className="inline-diff__file" title={filename}> |
| 54 | {filename ?? "diff"} |
| 55 | </span> |
| 56 | <span className="inline-diff__stats"> |
| 57 | <span className="inline-diff__add">+{addCount}</span> |
| 58 | <span className="inline-diff__del">−{delCount}</span> |
| 59 | </span> |
| 60 | <span className="inline-diff__spacer" /> |
| 61 | <button type="button" className="inline-diff__btn" onClick={copy} title="Copy diff"> |
| 62 | {copied ? <Check size={11} /> : <Copy size={11} />} |
| 63 | <span>{copied ? "Copied" : "Copy"}</span> |
| 64 | </button> |
| 65 | </header> |
| 66 | <pre className="inline-diff__body"> |
| 67 | <span className="inline-diff__table"> |
| 68 | {visible.map((r, i) => ( |
| 69 | <span key={i} className={`inline-diff__row inline-diff__row--${r.type}`}> |
| 70 | <span className="inline-diff__gutter"> |
| 71 | <span className="inline-diff__line">{r.oldLine ?? ""}</span> |
| 72 | <span className="inline-diff__line">{r.newLine ?? ""}</span> |
| 73 | <span className="inline-diff__sign">{r.type === "add" ? "+" : r.type === "del" ? "−" : " "}</span> |
| 74 | </span> |
| 75 | <span className="inline-diff__text">{r.text || " "}</span> |
| 76 | </span> |
| 77 | ))} |
| 78 | </span> |
| 79 | </pre> |
| 80 | {hidden > 0 && ( |
| 81 | <button |
| 82 | type="button" |
| 83 | className="inline-diff__more" |
| 84 | onClick={() => setOpen(true)} |
| 85 | aria-expanded={open} |
| 86 | > |
| 87 | <ChevronRight size={11} /> |
| 88 | <span>Show {hidden} more lines</span> |
| 89 | </button> |
| 90 | )} |
| 91 | {open && rows.length > maxRows && ( |
| 92 | <button |
| 93 | type="button" |
| 94 | className="inline-diff__more" |
| 95 | onClick={() => setOpen(false)} |
| 96 | aria-expanded={open} |
| 97 | > |
| 98 | <ChevronDown size={11} /> |
| 99 | <span>Collapse</span> |
| 100 | </button> |
| 101 | )} |
| 102 | </div> |
| 103 | ); |
| 104 | } |
| 105 | |
| 106 | // Re-export for callers that want to drive the row coloring themselves. |
| 107 | export type { DiffRow }; |
| 108 |