╭─────────────╮ │scroll to top│ ╰─────────────╯ ╭ ui.zig ───────────────────────────────────────────────────────╮ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ ╰───────────────────────────────────────────────────────────────╯
🬐 🬠 🬞🬂🬏 🬟 🬑 🬟 🬑 ╭a40064bb..╮ a40064bb.. see-em: 🬋🬋🬋 🬋🬋🬋 🬋 🬋 │files │ commits refs discuss issues new login 🬐 🬠 🬐 🬠 🬑 🬟 🬰 ╰──────────╯ (599) user
╭────╮ ╭ clone ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ╮ │http│ ssh │ │ ╰────╯ ╰ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ╯
.. embed/ event/ test/ ui/ command.zig diff3.zig event.zig find.zig fork.zig lib.zig main.zig main_wasm.zig markdown.zig patch.zig progress.zig push.zig search.zig search_commit.zig search_thread.zig serve.zig serve_common.zig serve_http.zig serve_ssh.zig serve_ssh_protocol.zig test.zig testnet.zig try.zig ╭─────────────────────────────────╮ │ui.zig │ ╰─────────────────────────────────╯ web.zig
2351 2352 // request a forward navigation to `route`; the host consumes next_page 2353 // (Nav.sync on the terminal, the wasm tick on the web). 2354 pub fn navigate(self: *Session, route: RoutablePage) !void { 2355 self.clearFormFeedback(); 2356 self.next_page = route; 2357 } 2358 }; 2359 2360 pub fn run(io: std.Io, allocator: std.mem.Allocator, session: *Session, repo_maybe: ?*rp.Repo(.xit, evt.admin_repo_opts)) !void { 2361 var nav = try Nav.init(allocator, session); 2362 defer nav.deinit(allocator); 2363 2364 var terminal = try term.Terminal.init(io, allocator); 2365 var terminal_live = true; 2366 defer if (terminal_live) terminal.deinit(io); 2367 2368 // set term as active so it will be properly cooked 2369 // when a panic/segfault happens 2370 term.setActive(&terminal); 2371 defer term.setActive(null); 2372 2373 while (!terminal.shouldQuit()) { 2374 const grid_changed = try terminal.render(&nav.root); 2375 2376 // process any inputs. 2377 // 2378 // if the grid didn't change, then first do a blocking 2379 // read, so the thread will sleep until further input. 2380 // after that, all remaining reads are non-blocking so 2381 // we can process the rest of the queued inputs. 2382 // 2383 // if the grid *did* change, then only do non-blocking 2384 // reads. we do not want to sleep the thread because 2385 // there may be an animation that requires more looping. 2386 var blocking = !grid_changed; 2387 while (try terminal.readKey(io, blocking)) |key| { 2388 blocking = false; 2389 try inputKey(allocator, &nav.root, key, session); 2390 } 2391 2392 if (session.host_request) |request| { 2393 session.host_request = null; 2394 switch (request) { 2395 .show_copyable_text => |copyable_text| { 2396 term.setActive(null); 2397 terminal.deinit(io); 2398 terminal_live = false; 2399 showCopyableText(io, copyable_text) catch |show_err| { 2400 terminal = try term.Terminal.init(io, allocator); 2401 terminal_live = true; 2402 term.setActive(&terminal); 2403 return show_err; 2404 }; 2405 terminal = try term.Terminal.init(io, allocator); 2406 terminal_live = true; 2407 term.setActive(&terminal); 2408 }, 2409 .undo => |target| Repo.Undo.handleRequest(allocator, session, target), 2410 .sync_events => { 2411 try nav.root.build(allocator, .{ 2412 .min_size = .{ .width = null, .height = null }, 2413 .max_size = .{ .width = terminal.size.width, .height = terminal.size.height }, 2414 }, nav.root.getFocus()); 2415 _ = try terminal.render(&nav.root); 2416 try Repo.Events.performSync(allocator, session); 2417 }, 2418 } 2419 } 2420 2421 // persist queued actions when there's a repo; local mode has none, 2422 // so just apply in-memory 2423 if (repo_maybe) |repo| { 2424 try session.applyAndWritePending(io, allocator, repo); 2425 // reload so the next navigation builds its page from the current moment 2426 try session.reloadMoment(allocator, repo); 2427 } else { 2428 session.applyPending(); 2429 } 2430 2431 // reconcile navigation: forward to a new page, or back on escape. 2432 try nav.sync(allocator, session); 2433 2434 // the quit button (on the quit tab) asks the host to tear down. 2435 if (session.quit_requested) terminal.requestQuit(); 2436 2437 try nav.root.build(allocator, .{ 2438 .min_size = .{ .width = null, .height = null }, 2439 .max_size = .{ .width = terminal.size.width, .height = terminal.size.height }, 2440 }, nav.root.getFocus()); 2441 } 2442 } 2443 2444 fn showCopyableText(io: std.Io, copyable_text: []const u8) !void { 2445 const tty: ?std.Io.File = if (builtin.os.tag == .windows) 2446 null 2447 else 2448 try std.Io.Dir.cwd().openFile(io, "/dev/tty", .{ .mode = .read_write }); 2449 defer if (tty) |file| file.close(io); 2450 2451 const input = if (tty) |file| file else std.Io.File.stdin(); 2452 const output = if (tty) |file| file else std.Io.File.stdout(); 2453 2454 var write_buf: [1024]u8 = undefined; 2455 var writer = output.writer(io, &write_buf); 2456 try writer.interface.print("\x1b[2J\x1b[Hcopy the following text and then press enter to go back:\r\n\r\n{s}\r\n", .{copyable_text}); 2457 try writer.interface.flush(); 2458 2459 var read_buf: [1]u8 = undefined; 2460 var reader = input.reader(io, &read_buf); 2461 while (true) { 2462 const byte = try reader.interface.takeByte(); 2463 if (byte == '\r' or byte == '\n') return; 2464 } 2465 } 2466 2467 pub fn inputKey(allocator: std.mem.Allocator, root: *Widget, key: Key, session: *Session) !void { 2468 const root_focus = root.getFocus(); 2469 const focused_before = root_focus.grandchild_id; 2470 var activate_in_page_link = false; 2471 switch (key) { 2472 // request a navigation pop; the host's Nav.sync goes back a page, or 2473 // quits when there's no history left. 2474 .escape => { 2475 session.back = .requested; 2476 return; 2477 }, 2478 .ctrl => |letter| switch (letter) { 2479 'r' => { 2480 session.refresh_requested = true; 2481 return; 2482 }, 2483 else => try root.input(allocator, key, root_focus), 2484 }, 2485 .enter => { 2486 if (root_focus.grandchild_id) |gid| { 2487 // follow a cross-page link 2488 if (crossPageLink(root_focus, gid, session.data)) |route| { 2489 return session.navigate(route); 2490 } 2491 if (rawLink(root_focus, gid)) |url| return requestRawLink(session, url); 2492 } 2493 activate_in_page_link = true; 2494 try root.input(allocator, key, root_focus); 2495 }, 2496 .mouse => |mouse| { 2497 if (mouse.action == .press and mouse.action.press == .left) { 2498 if (root_focus.hitTest(mouse.x, mouse.y)) |hit| { 2499 const focus_id = hit.id; 2500 if (hit.kind == .background) { 2501 root_focus.setFocus(focus_id); 2502 return; 2503 } 2504 if (widget.isBackButton((root_focus.children.get(focus_id) orelse return).focus)) { 2505 if (session.back == .available) session.back = .requested; 2506 return; 2507 } 2508 // follow a cross-page link 2509 if (crossPageLink(root_focus, focus_id, session.data)) |route| { 2510 return session.navigate(route); 2511 } 2512 if (rawLink(root_focus, focus_id)) |url| { 2513 if (!mouse.ctrl) try requestRawLink(session, url); 2514 return; 2515 } 2516 root_focus.setFocus(focus_id); 2517 activate_in_page_link = true; 2518 } 2519 // forward the press into the widget tree so buttons (and any 2520 // future click-aware widgets) can react. widgets that don't 2521 // care about presses ignore it. 2522 try root.input(allocator, key, root_focus); 2523 } else { 2524 try root.input(allocator, key, root_focus); 2525 } 2526 }, 2527 else => try root.input(allocator, key, root_focus), 2528 } 2529 2530 const focused_after = root_focus.grandchild_id; 2531 if (!activate_in_page_link and focused_before == focused_after) return; 2532 const focus_id = focused_after orelse return; 2533 if (inPageLink(root_focus, focus_id, session.data)) |route| session.data.current_page = route; 2534 } 2535 2536 // a link to bytes the server serves directly rather than to a page route, so 2537 // it never resolves to a RoutablePage 2538 pub const raw_link_prefix = "ax:"; 2539 2540 // a route already loaded into the current page; focusing it changes the url 2541 // without rebuilding the page 2542 pub const in_page_link_prefix = "ai:"; 2543 2544 // an in-page tab's base route, or the exact current route when it is selected 2545 pub fn inPageTabLink(session: *Session, route: RoutablePage, selected: bool) ![]const u8 { 2546 const target = if (selected) session.data.current_page else route; 2547 return std.fmt.allocPrint(session.page_arena.allocator(), "{s}{s}", .{ in_page_link_prefix, try target.toUrl(session.page_arena) }); 2548 } 2549 2550 // a button the web renderer covers with a file picker that posts the chosen 2551 // file to the url after the prefix 2552 pub const file_input_prefix = "file:"; 2553 2554 // a submit button that overrides its enclosing form's action 2555 pub const submit_action_prefix = "submit:"; 2556 2557 // the url an `ax:` link points at, or null for anything else. a host that 2558 // suppresses the anchor's own navigation needs this to follow the link. 2559 pub fn rawLink(root_focus: *Focus, focus_id: usize) ?[]const u8 { 2560 const child = root_focus.children.get(focus_id) orelse return null; 2561 const custom = switch (child.focus.kind) { 2562 .custom => |c| c, 2563 else => return null, 2564 }; 2565 if (!std.mem.startsWith(u8, custom, raw_link_prefix)) return null; 2566 return custom[raw_link_prefix.len..]; 2567 } 2568 2569 fn requestRawLink(session: *Session, url: []const u8) !void { 2570 session.host_request = .{ .show_copyable_text = try terminalWebUrl(session.page_arena.allocator(), session, url) }; 2571 } 2572 2573 pub fn terminalWebUrl(allocator: std.mem.Allocator, session: *const Session, path: []const u8) ![]const u8 { 2574 // an absolute url is already complete 2575 if (!std.mem.startsWith(u8, path, "/")) return path; 2576 return if (session.web_port) |port| 2577 try std.fmt.allocPrint(allocator, "http://localhost:{d}{s}", .{ port, path }) 2578 else 2579 path; 2580 } 2581 2582 // if the focus target at focus_id is an `a:` link that should navigate (a 2583 // different parent page, or a different files directory within the repo page), 2584 // return its route; otherwise null. lets a host turn a click / enter on such a 2585 // link into a navigation rather than a focus change. 2586 pub fn crossPageLink(root_focus: *Focus, focus_id: usize, data: Session.Data) ?RoutablePage { 2587 const current = data.current_page; 2588 const route = pageLink(root_focus, focus_id, data, "a:") orelse return null; 2589 // a link to a different parent page always navigates; within a page, a 2590 // files-directory / commits-page / list-window change navigates while tab 2591 // links stay in-page. 2592 if (route.parent() != current.parent() or RoutablePage.repoPageChanged(route, current) or RoutablePage.forkPageChanged(route, current) or RoutablePage.homePageChanged(route, current) or RoutablePage.userPageChanged(route, current)) return route; 2593 return null; 2594 } 2595 2596 // the route carried by an `ai:` focus target, or null for any other target 2597 pub fn inPageLink(root_focus: *Focus, focus_id: usize, data: Session.Data) ?RoutablePage { 2598 return pageLink(root_focus, focus_id, data, in_page_link_prefix); 2599 } 2600 2601 fn pageLink(root_focus: *Focus, focus_id: usize, data: Session.Data, prefix: []const u8) ?RoutablePage { 2602 const child = root_focus.children.get(focus_id) orelse return null; 2603 const custom = switch (child.focus.kind) { 2604 .custom => |c| c, 2605 else => return null, 2606 }; 2607 if (!std.mem.startsWith(u8, custom, prefix)) return null; 2608 const path = custom[prefix.len..]; 2609 // local sessions build (and parse) links with the repo identity elided 2610 return if (data.host_kind == .local) RoutablePage.fromUrlLocal(path) else RoutablePage.fromUrl(path); 2611 } 2612 2613 // a display author, resolved against the admin db at read time 2614 pub const Author = union(enum) { 2615 unknown, 2616 email: []const u8, // an email no user matches 2617 user_name: []const u8, 2618 2619 // the commit author line's email, resolved like initFromEmail 2620 pub fn init( 2621 haxy_moment: ?evt.AdminDB.HashMap(.read_only), 2622 arena: *std.heap.ArenaAllocator, 2623 author_line: []const u8, 2624 ) !Author { 2625 return initFromEmail(haxy_moment, arena, evt.authorEmail(author_line)); 2626 } 2627 2628 // from a record's stored author email: it resolves to the user currently 2629 // holding it, else stays the email. the result is allocated in `arena`, 2630 // so the email may borrow transient memory. 2631 pub fn initFromEmail( 2632 haxy_moment: ?evt.AdminDB.HashMap(.read_only), 2633 arena: *std.heap.ArenaAllocator, 2634 author_email: ?[]const u8, 2635 ) !Author { 2636 const email = author_email orelse return .unknown; 2637 if (haxy_moment) |moment| { 2638 if (try evt.User.readByEmail(evt.AdminDB, evt.admin_repo_opts.hash, moment, arena, email)) |user| { 2639 return .{ .user_name = user.name }; 2640 } 2641 } 2642 return .{ .email = try arena.allocator().dupe(u8, email) }; 2643 } 2644 }; 2645 2646 // the "a:" link to user `name`'s page. 2647 pub fn userLink(page_arena: *std.heap.ArenaAllocator, name: []const u8) ![]const u8 { 2648 const parsed = RoutablePage.Array(evt.User.name_max_len).from(name) orelse return error.RouteTooLong; 2649 const url = try (RoutablePage{ .user_repos = .{ .name = parsed } }).toUrl(page_arena); 2650 return std.fmt.allocPrint(page_arena.allocator(), "a:{s}", .{url}); 2651 } 2652 2653 // a focusable " author " box showing `author`, linking to their user page 2654 // when it is a known user 2655 pub fn authorBox(allocator: std.mem.Allocator, page_arena: *std.heap.ArenaAllocator, author: Author) !wgt.TextBox { 2656 const text = switch (author) { 2657 .unknown => "", 2658 .email, .user_name => |t| t, 2659 }; 2660 var tb = try wgt.TextBox.init(allocator, text, .{ .border_style = .single, .round_corners = true, .wrap_kind = .none, .label = " author " }); 2661 errdefer tb.deinit(allocator); 2662 tb.getFocus().mode = .all; 2663 switch (author) { 2664 .user_name => |name| tb.getFocus().kind = .{ .custom = try userLink(page_arena, name) }, 2665 else => {}, 2666 } 2667 return tb; 2668 } 2669 2670 // native-TUI navigation 2671 pub const Nav = struct { 2672 root: Widget, 2673 // backs the current page (its Page data and the page-scoped strings its 2674 // widgets build). owned here, swapped on each navigation. session.page_arena 2675 // tracks whichever of these is current so widgets allocate into it. 2676 arena: *std.heap.ArenaAllocator, 2677 history: std.ArrayList(Entry), 2678 2679 // each retained page keeps its own arena, freed when the page leaves the 2680 // stack (popped on back, evicted at cap, or on deinit). this is what keeps a 2681 // long-lived session from accumulating every page it ever visited. 2682 const Entry = struct { root: Widget, route: RoutablePage, arena: *std.heap.ArenaAllocator }; 2683 2684 // cap on retained back-history so the chain can't grow memory without bound 2685 const max_history: usize = 16; 2686 2687 pub fn init(allocator: std.mem.Allocator, session: *Session) !Nav { 2688 session.back = .unavailable; 2689 const arena = try allocator.create(std.heap.ArenaAllocator); 2690 arena.* = std.heap.ArenaAllocator.init(allocator); 2691 errdefer { 2692 arena.deinit(); 2693 allocator.destroy(arena); 2694 } 2695 2696 session.page_arena = arena; 2697 const route = session.data.current_page; 2698 2699 const page = try arena.allocator().create(Page); 2700 page.* = try Page.init(arena, session, route); 2701 return .{ 2702 .root = try initRoot(allocator, page, session), 2703 .arena = arena, 2704 .history = .empty, 2705 }; 2706 } 2707 2708 pub fn deinit(self: *Nav, allocator: std.mem.Allocator) void { 2709 self.root.deinit(allocator); 2710 freeArena(allocator, self.arena); 2711 for (self.history.items) |*entry| { 2712 entry.root.deinit(allocator); 2713 freeArena(allocator, entry.arena); 2714 } 2715 self.history.deinit(allocator); 2716 } 2717 2718 fn freeArena(allocator: std.mem.Allocator, arena: *std.heap.ArenaAllocator) void { 2719 arena.deinit(); 2720 allocator.destroy(arena); 2721 } 2722 2723 // reconcile the displayed root with the session's navigation state. a 2724 // forward nav (current_page moved to a different parent page) pushes the 2725 // current root and builds the new page in a fresh arena; a back request 2726 // frees the current page and restores the previous one. when escape is 2727 // pressed with no history left we switch to the quit tab instead of quitting. 2728 pub fn sync(self: *Nav, allocator: std.mem.Allocator, session: *Session) !void { 2729 // refresh: rebuild the current page in place from a current moment 2730 if (session.refresh_requested) { 2731 session.refresh_requested = false; 2732 if (session.haxy_moment != null or session.local != null) { 2733 const arena = try allocator.create(std.heap.ArenaAllocator); 2734 arena.* = std.heap.ArenaAllocator.init(allocator); 2735 errdefer freeArena(allocator, arena); 2736 2737 session.page_arena = arena; 2738 2739 const route = session.data.current_page; 2740 const page = try arena.allocator().create(Page); 2741 page.* = try Page.init(arena, session, route); 2742 const new_root = try initRoot(allocator, page, session); 2743 2744 self.root.deinit(allocator); 2745 freeArena(allocator, self.arena); 2746 self.root = new_root; 2747 self.arena = arena; 2748 } 2749 return; 2750 } 2751 2752 if (session.back == .requested) { 2753 if (self.history.pop()) |entry| { 2754 session.back = if (self.history.items.len == 0) .unavailable else .available; 2755 self.root.deinit(allocator); 2756 freeArena(allocator, self.arena); 2757 self.root = entry.root; 2758 self.arena = entry.arena; 2759 session.page_arena = entry.arena; 2760 session.data.current_page = entry.route; 2761 chooseAnsiArtForNavigation(session); 2762 return; 2763 } 2764 session.back = .unavailable; 2765 // nothing to go back to; switch to the quit confirmation 2766 const root_focus = self.root.getFocus(); 2767 var iter = root_focus.children.iterator(); 2768 while (iter.next()) |entry| { 2769 switch (entry.value_ptr.focus.kind) { 2770 .custom => |custom| if (std.mem.eql(u8, custom, Quit.tab_kind)) { 2771 root_focus.setFocus(entry.key_ptr.*); 2772 // a Stack only builds its selected child, so the quit 2773 // button isn't in the focus tree until a build runs with 2774 // the quit tab selected. build once, then send a 2775 // synthetic arrow_down to drop focus from the tab onto 2776 // the button so it's ready to confirm. 2777 try self.root.build(allocator, .{ 2778 .min_size = .{ .width = null, .height = 40 }, 2779 .max_size = .{ .width = 80, .height = null }, 2780 }, root_focus); 2781 try self.root.input(allocator, .arrow_down, root_focus); 2782 break; 2783 }, 2784 else => {}, 2785 } 2786 } 2787 return; 2788 } 2789 2790 // forward navigation: navigate() set next_page to the page to move to (a 2791 // cross-page link or tab change crossing pages) 2792 if (session.next_page) |route| { 2793 session.next_page = null; 2794 if (session.haxy_moment == null and session.local == null) return; 2795 const previous_route = session.data.current_page; 2796 // the page we navigated to becomes the current page 2797 session.data.current_page = route; 2798 session.back = .available; 2799 2800 const arena = try allocator.create(std.heap.ArenaAllocator); 2801 arena.* = std.heap.ArenaAllocator.init(allocator); 2802 errdefer freeArena(allocator, arena); 2803 2804 session.page_arena = arena; 2805 2806 const page = try arena.allocator().create(Page); 2807 page.* = try Page.init(arena, session, route); 2808 const new_root = try initRoot(allocator, page, session); 2809 2810 try self.history.append(allocator, .{ .root = self.root, .route = previous_route, .arena = self.arena }); 2811 // drop the oldest entry (freeing its widget tree and arena) once over cap 2812 if (self.history.items.len > max_history) { 2813 var oldest = self.history.orderedRemove(0); 2814 oldest.root.deinit(allocator); 2815 freeArena(allocator, oldest.arena); 2816 } 2817 self.root = new_root; 2818 self.arena = arena; 2819 } 2820 } 2821 }; 2822 2823 pub fn initRoot(allocator: std.mem.Allocator, page: *const Page, session: *Session) !Widget { 2824 const page_widget: Widget = switch (page.*) { 2825 .home => |*p| .{ .home = try .init(allocator, p, session) }, 2826 .user => |*p| .{ .user = try .init(allocator, p, session) }, 2827 .repo => |*p| .{ .repo = try .init(allocator, p, session) }, 2828 .fork => |*p| .{ .fork = try .init(allocator, p, session) }, 2829 }; 2830 2831 chooseAnsiArtForNavigation(session); 2832 2833 // on the TUI/SSH, the page sits above a one-row footer showing its web 2834 // url, when there's a web UI to point at 2835 var root = if (session.is_terminal) blk: { 2836 var box = try wgt.Box(Widget).init(allocator, .{ .border_style = null, .direction = .vert }); 2837 errdefer box.deinit(allocator); 2838 const bg_id = bg_blk: { 2839 var background = try widget.AnsiBackground.init(allocator, page_widget, session); 2840 errdefer background.deinit(allocator); 2841 const id = background.getFocus().id; 2842 try box.children.put(allocator, id, .{ .widget = .{ .background = background }, .rect = null, .min_size = null }); 2843 break :bg_blk id; 2844 }; 2845 if (session.web_port != null) { 2846 var footer = try widget.Footer.init(allocator, session); 2847 errdefer footer.deinit(allocator); 2848 try box.children.put(allocator, footer.getFocus().id, .{ .widget = .{ .footer = footer }, .rect = null, .min_size = .{ .width = null, .height = 1 } }); 2849 } 2850 box.getFocus().child_id = bg_id; 2851 break :blk Widget{ .box = box }; 2852 } else Widget{ .background = try widget.AnsiBackground.init(allocator, page_widget, session) }; 2853 errdefer root.deinit(allocator); 2854 2855 // input-owning views build their TextInputs in init, so reset their 2856 // registrations here 2857 session.text_inputs.clearRetainingCapacity(); 2858 2859 try root.build(allocator, .{ 2860 .min_size = .{ .width = null, .height = 40 }, 2861 .max_size = .{ .width = 100, .height = null }, 2862 }, root.getFocus()); 2863 2864 return root; 2865 } 2866 2867 // native and server-side sessions choose from the embedded collection. WASM 2868 // keeps the art serialized by the server instead. 2869 fn chooseAnsiArtForNavigation(session: *Session) void { 2870 if (comptime ansi_arts.len == 0) return; 2871 const io = session.io orelse return; 2872 var random: usize = undefined; 2873 io.random(std.mem.asBytes(&random)); 2874 session.data.ansi_art = ansi_arts[random % ansi_arts.len]; 2875 } 2876