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master @ 79 LINES
 
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// Clickable file path, github-style: repo / dir / dir / leaf. Every
// segment but the last links to its tree page; long paths wrap at
// segment boundaries.
import { checkGrid, len } from "../../lib/ascii";

export interface PathSeg {
  label: string;
  href?: string;
  /** Continuation piece of a segment longer than the frame - rendered
   *  without a separator. */
  cont?: boolean;
}

export interface Props {
  repo: { name: string; slug: string };
  branch: string;
  /** Path within the repo; the leaf gets no link. */
  path: string;
  /** Link the leaf too (tree pages: current dir is the leaf). */
  linkLeaf?: boolean;
}

export function pathSegs(
  repo: { name: string; slug: string },
  branch: string,
  path: string,
  linkLeaf = false,
): PathSeg[] {
  const segs: PathSeg[] = [{ label: repo.name, href: `/git/${repo.slug}/` }];
  const parts = path.split("/").filter(Boolean);
  parts.forEach((part, i) => {
    const isLeaf = i === parts.length - 1;
    const sub = parts.slice(0, i + 1).join("/");
    segs.push({
      label: part,
      href: !isLeaf || linkLeaf ? `/git/${repo.slug}/tree/${branch}/${sub}/` : und
efined,
    });
  });
  if (!linkLeaf && segs.length > 1) delete segs[segs.length - 1].href;
  return segs;
}

/** Rows of segments fitting `width`; each costs " / " after the
 *  first. Segments wider than the frame (real filenames get there)
 *  hard-wrap into continuation pieces. */
export function layoutPath(segs: PathSeg[], width: number): PathSeg[][] {
  const maxSeg = width - 2;
  const pieces: PathSeg[] = [];
  for (const s of segs) {
    if (len(s.label) <= maxSeg) {
      pieces.push(s);
      continue;
    }
    const cps = [...s.label];
    for (let i = 0; i < cps.length; i += maxSeg) {
      pieces.push({
        label: cps.slice(i, i + maxSeg).join(""),
        href: s.href,
        cont: i > 0,
      });
    }
  }
  const rows: PathSeg[][] = [[]];
  let used = 0;
  for (const s of pieces) {
    checkGrid(s.label, width, "git path segment");
    const row = rows[rows.length - 1];
    const w = len(s.label) + (row.length && !s.cont ? 3 : 0);
    if (row.length && used + w > width) {
      rows.push([s]);
      used = len(s.label);
    } else {
      row.push(s);
      used += w;
    }
  }
  return rows;
}


// Clickable file path, github-style: repo /
 dir / dir / leaf. Every
// segment but the last links to its tree pa
ge; long paths wrap at
// segment boundaries.
import { checkGrid, len } from "../../lib/as
cii";

export interface PathSeg {
  label: string;
  href?: string;
  /** Continuation piece of a segment longer
 than the frame - rendered
   *  without a separator. */
  cont?: boolean;
}

export interface Props {
  repo: { name: string; slug: string };
  branch: string;
  /** Path within the repo; the leaf gets no
 link. */
  path: string;
  /** Link the leaf too (tree pages: current
 dir is the leaf). */
  linkLeaf?: boolean;
}

export function pathSegs(
  repo: { name: string; slug: string },
  branch: string,
  path: string,
  linkLeaf = false,
): PathSeg[] {
  const segs: PathSeg[] = [{ label: repo.nam
e, href: `/git/${repo.slug}/` }];
  const parts = path.split("/").filter(Boole
an);
  parts.forEach((part, i) => {
    const isLeaf = i === parts.length - 1;
    const sub = parts.slice(0, i + 1).join("
/");
    segs.push({
      label: part,
      href: !isLeaf || linkLeaf ? `/git/${re
po.slug}/tree/${branch}/${sub}/` : undefined
,
    });
  });
  if (!linkLeaf && segs.length > 1) delete s
egs[segs.length - 1].href;
  return segs;
}

/** Rows of segments fitting `width`; each c
osts " / " after the
 *  first. Segments wider than the frame (re
al filenames get there)
 *  hard-wrap into continuation pieces. */
export function layoutPath(segs: PathSeg[], 
width: number): PathSeg[][] {
  const maxSeg = width - 2;
  const pieces: PathSeg[] = [];
  for (const s of segs) {
    if (len(s.label) <= maxSeg) {
      pieces.push(s);
      continue;
    }
    const cps = [...s.label];
    for (let i = 0; i < cps.length; i += max
Seg) {
      pieces.push({
        label: cps.slice(i, i + maxSeg).join
(""),
        href: s.href,
        cont: i > 0,
      });
    }
  }
  const rows: PathSeg[][] = [[]];
  let used = 0;
  for (const s of pieces) {
    checkGrid(s.label, width, "git path segm
ent");
    const row = rows[rows.length - 1];
    const w = len(s.label) + (row.length && 
!s.cont ? 3 : 0);
    if (row.length && used + w > width) {
      rows.push([s]);
      used = len(s.label);
    } else {
      row.push(s);
      used += w;
    }
  }
  return rows;
}

 
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