ifcurl/forgejo/templates/custom/footer.tmpl

<script>
// Copyright 2026 The Forgejo Authors. All rights reserved.
// SPDX-License-Identifier: MIT
//
// ifcurl — inject "View in 3D" button on .ifc file view and history pages.
//
// Deploy to: /etc/forgejo/templates/custom/footer.tmpl
//
// Uses commit-hash hrefs (always unambiguous) to construct ifc:// URLs.
(function () {
  "use strict";

  var VIEWER_BASE = "/assets/viewer.html";

  // Parse /owner/repo/src/commit/{40hex}/{treepath}
  // Returns {repoPath, hash, treePath} or null.
  function parseCommitHref(href) {
    var m = href.match(/^\/([^/]+\/[^/]+)\/src\/commit\/([0-9a-f]{40})\/(.+)$/i);
    if (!m) return null;
    return { repoPath: m[1], hash: m[2], treePath: m[3] };
  }

  function makeViewerLink(info, label, cls) {
    var host   = window.location.host;
    var ifcUrl = "ifc://" + host + "/" + info.repoPath
               + "@" + info.hash
               + "?path=" + encodeURIComponent(info.treePath);
    var a = document.createElement("a");
    a.href       = VIEWER_BASE + "?url=" + encodeURIComponent(ifcUrl);
    a.target     = "_blank";
    a.rel        = "noopener noreferrer";
    a.className  = cls || "ui mini basic button";
    a.textContent = label;
    return a;
  }

  function init() {
    var host = window.location.host;

    // -----------------------------------------------------------------------
    // Case 1: single file view — permalink button in .file-header-right.
    // -----------------------------------------------------------------------
    var btnGroup = document.querySelector(".file-header-right .ui.buttons");
    if (btnGroup) {
      // Permalink href or current URL when already at a commit.
      var a = document.querySelector('a[href*="/src/commit/"]');
      var href = a ? a.getAttribute("href") : window.location.pathname;
      var info = parseCommitHref(href);
      if (info && info.treePath.toLowerCase().endsWith(".ifc")) {
        btnGroup.appendChild(makeViewerLink(info, "View in 3D"));
      }
      return;
    }

    // -----------------------------------------------------------------------
    // Case 2: file history page — inject a "3D" link next to each commit's
    // browse-file link (/src/commit/{hash}/{treepath}).
    // -----------------------------------------------------------------------
    document.querySelectorAll('a[href*="/src/commit/"]').forEach(function(a) {
      var info = parseCommitHref(a.getAttribute("href"));
      if (!info || !info.treePath.toLowerCase().endsWith(".ifc")) return;
      var btn = makeViewerLink(info, "3D");
      btn.style.marginLeft = "4px";
      a.insertAdjacentElement("afterend", btn);
    });
  }

  if (document.readyState === "loading") {
    document.addEventListener("DOMContentLoaded", init);
  } else {
    init();
  }
})();
</script>