feat(status): improve status output

src/terminal/table.ts

@@ -0,0 +1,265 @@
+import { visibleWidth } from "./ansi.js";
+
+type Align = "left" | "right" | "center";
+
+export type TableColumn = {
+  key: string;
+  header: string;
+  align?: Align;
+  minWidth?: number;
+  maxWidth?: number;
+  flex?: boolean;
+};
+
+export type RenderTableOptions = {
+  columns: TableColumn[];
+  rows: Array<Record<string, string>>;
+  width?: number;
+  padding?: number;
+  border?: "unicode" | "ascii" | "none";
+};
+
+function repeat(ch: string, n: number): string {
+  if (n <= 0) return "";
+  return ch.repeat(n);
+}
+
+function padCell(text: string, width: number, align: Align): string {
+  const w = visibleWidth(text);
+  if (w >= width) return text;
+  const pad = width - w;
+  if (align === "right") return `${repeat(" ", pad)}${text}`;
+  if (align === "center") {
+    const left = Math.floor(pad / 2);
+    const right = pad - left;
+    return `${repeat(" ", left)}${text}${repeat(" ", right)}`;
+  }
+  return `${text}${repeat(" ", pad)}`;
+}
+
+function wrapLine(text: string, width: number): string[] {
+  if (width <= 0) return [text];
+  const words = text.split(/(\s+)/).filter(Boolean);
+  const lines: string[] = [];
+  let current = "";
+  let currentWidth = 0;
+  const push = (value: string) => lines.push(value.replace(/\s+$/, ""));
+
+  const flush = () => {
+    if (current.trim().length === 0) return;
+    push(current);
+    current = "";
+    currentWidth = 0;
+  };
+
+  const breakLong = (word: string) => {
+    const parts: string[] = [];
+    let buf = "";
+    let lastBreakAt = 0;
+    const isBreakChar = (ch: string) =>
+      ch === "/" || ch === "-" || ch === "_" || ch === ".";
+    for (const ch of Array.from(word)) {
+      const next = buf + ch;
+      if (visibleWidth(next) > width && buf) {
+        if (lastBreakAt > 0) {
+          parts.push(buf.slice(0, lastBreakAt));
+          buf = `${buf.slice(lastBreakAt)}${ch}`;
+          lastBreakAt = 0;
+          for (let i = 0; i < buf.length; i += 1) {
+            const c = buf[i];
+            if (c && isBreakChar(c)) lastBreakAt = i + 1;
+          }
+        } else {
+          parts.push(buf);
+          buf = ch;
+        }
+      } else {
+        buf = next;
+        if (isBreakChar(ch)) lastBreakAt = buf.length;
+      }
+    }
+    if (buf) parts.push(buf);
+    return parts;
+  };
+
+  for (const token of words) {
+    const tokenWidth = visibleWidth(token);
+    const isSpace = /^\s+$/.test(token);
+
+    if (tokenWidth > width && !isSpace) {
+      flush();
+      for (const part of breakLong(token.replace(/^\s+/, ""))) {
+        push(part);
+      }
+      continue;
+    }
+
+    if (
+      currentWidth + tokenWidth > width &&
+      current.trim().length > 0 &&
+      !isSpace
+    ) {
+      flush();
+    }
+
+    current += token;
+    currentWidth = visibleWidth(current);
+  }
+
+  flush();
+  return lines.length ? lines : [""];
+}
+
+function normalizeWidth(n: number | undefined): number | undefined {
+  if (n == null) return undefined;
+  if (!Number.isFinite(n) || n <= 0) return undefined;
+  return Math.floor(n);
+}
+
+export function renderTable(opts: RenderTableOptions): string {
+  const border = opts.border ?? "unicode";
+  if (border === "none") {
+    const columns = opts.columns;
+    const header = columns.map((c) => c.header).join(" | ");
+    const lines = [
+      header,
+      ...opts.rows.map((r) => columns.map((c) => r[c.key] ?? "").join(" | ")),
+    ];
+    return `${lines.join("\n")}\n`;
+  }
+
+  const padding = Math.max(0, opts.padding ?? 1);
+  const columns = opts.columns;
+
+  const metrics = columns.map((c) => {
+    const headerW = visibleWidth(c.header);
+    const cellW = Math.max(
+      0,
+      ...opts.rows.map((r) => visibleWidth(r[c.key] ?? "")),
+    );
+    return { headerW, cellW };
+  });
+
+  const widths = columns.map((c, i) => {
+    const m = metrics[i];
+    const base = Math.max(m?.headerW ?? 0, m?.cellW ?? 0) + padding * 2;
+    const capped = c.maxWidth ? Math.min(base, c.maxWidth) : base;
+    return Math.max(c.minWidth ?? 3, capped);
+  });
+
+  const maxWidth = normalizeWidth(opts.width);
+  const sepCount = columns.length + 1;
+  const total = widths.reduce((a, b) => a + b, 0) + sepCount;
+
+  const preferredMinWidths = columns.map((c, i) =>
+    Math.max(c.minWidth ?? 3, (metrics[i]?.headerW ?? 0) + padding * 2, 3),
+  );
+  const absoluteMinWidths = columns.map((_c, i) =>
+    Math.max((metrics[i]?.headerW ?? 0) + padding * 2, 3),
+  );
+
+  if (maxWidth && total > maxWidth) {
+    let over = total - maxWidth;
+
+    const flexOrder = columns
+      .map((_c, i) => ({ i, w: widths[i] ?? 0 }))
+      .filter(({ i }) => Boolean(columns[i]?.flex))
+      .sort((a, b) => b.w - a.w)
+      .map((x) => x.i);
+
+    const nonFlexOrder = columns
+      .map((_c, i) => ({ i, w: widths[i] ?? 0 }))
+      .filter(({ i }) => !columns[i]?.flex)
+      .sort((a, b) => b.w - a.w)
+      .map((x) => x.i);
+
+    const shrink = (order: number[], minWidths: number[]) => {
+      while (over > 0) {
+        let progressed = false;
+        for (const i of order) {
+          if ((widths[i] ?? 0) <= (minWidths[i] ?? 0)) continue;
+          widths[i] = (widths[i] ?? 0) - 1;
+          over -= 1;
+          progressed = true;
+          if (over <= 0) break;
+        }
+        if (!progressed) break;
+      }
+    };
+
+    // Prefer shrinking flex columns; only shrink non-flex if necessary.
+    // If required to fit, allow flex columns to shrink below user minWidth
+    // down to their absolute minimum (header + padding).
+    shrink(flexOrder, preferredMinWidths);
+    shrink(flexOrder, absoluteMinWidths);
+    shrink(nonFlexOrder, preferredMinWidths);
+    shrink(nonFlexOrder, absoluteMinWidths);
+  }
+
+  const box =
+    border === "ascii"
+      ? {
+          tl: "+",
+          tr: "+",
+          bl: "+",
+          br: "+",
+          h: "-",
+          v: "|",
+          t: "+",
+          ml: "+",
+          m: "+",
+          mr: "+",
+          b: "+",
+        }
+      : {
+          tl: "┌",
+          tr: "┐",
+          bl: "└",
+          br: "┘",
+          h: "─",
+          v: "│",
+          t: "┬",
+          ml: "├",
+          m: "┼",
+          mr: "┤",
+          b: "┴",
+        };
+
+  const hLine = (left: string, mid: string, right: string) =>
+    `${left}${widths.map((w) => repeat(box.h, w)).join(mid)}${right}`;
+
+  const contentWidthFor = (i: number) => Math.max(1, widths[i] - padding * 2);
+  const padStr = repeat(" ", padding);
+
+  const renderRow = (record: Record<string, string>, isHeader = false) => {
+    const cells = columns.map((c) =>
+      isHeader ? c.header : (record[c.key] ?? ""),
+    );
+    const wrapped = cells.map((cell, i) => wrapLine(cell, contentWidthFor(i)));
+    const height = Math.max(...wrapped.map((w) => w.length));
+    const out: string[] = [];
+    for (let li = 0; li < height; li += 1) {
+      const parts = wrapped.map((lines, i) => {
+        const raw = lines[li] ?? "";
+        const aligned = padCell(
+          raw,
+          contentWidthFor(i),
+          columns[i]?.align ?? "left",
+        );
+        return `${padStr}${aligned}${padStr}`;
+      });
+      out.push(`${box.v}${parts.join(box.v)}${box.v}`);
+    }
+    return out;
+  };
+
+  const lines: string[] = [];
+  lines.push(hLine(box.tl, box.t, box.tr));
+  lines.push(...renderRow({}, true));
+  lines.push(hLine(box.ml, box.m, box.mr));
+  for (const row of opts.rows) {
+    lines.push(...renderRow(row, false));
+  }
+  lines.push(hLine(box.bl, box.b, box.br));
+  return `${lines.join("\n")}\n`;
+}