╭─────────────╮ │scroll to top│ ╰─────────────╯ ╭ ui.zig ───────────────────────────────────────────────────────╮ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ ╰───────────────────────────────────────────────────────────────╯
🬐 🬠 🬞🬂🬏 🬟 🬑 🬟 🬑 ╭d23217c1..╮ d23217c1.. see-em: 🬋🬋🬋 🬋🬋🬋 🬋 🬋 │files │ commits refs discuss issues new login 🬐 🬠 🬐 🬠 🬑 🬟 🬰 ╰──────────╯ (650) 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
2467 // there may be an animation that requires more looping. 2468 var blocking = !grid_changed; 2469 while (try terminal.readKey(io, blocking)) |key| { 2470 blocking = false; 2471 try inputKey(allocator, &nav.root, key, session); 2472 } 2473 2474 if (session.host_request) |request| { 2475 session.host_request = null; 2476 switch (request) { 2477 .show_copyable_text => |copyable_text| { 2478 term.setActive(null); 2479 terminal.deinit(io); 2480 terminal_live = false; 2481 showCopyableText(io, copyable_text) catch |show_err| { 2482 terminal = try term.Terminal.init(io, allocator); 2483 terminal_live = true; 2484 term.setActive(&terminal); 2485 return show_err; 2486 }; 2487 terminal = try term.Terminal.init(io, allocator); 2488 terminal.render_state.no_color = !session.color; 2489 terminal_live = true; 2490 term.setActive(&terminal); 2491 }, 2492 .undo => |target| Repo.Undo.handleRequest(allocator, session, target), 2493 .sync_events => { 2494 try nav.root.build(allocator, .{ 2495 .min_size = .{ .width = null, .height = null }, 2496 .max_size = .{ .width = terminal.size.width, .height = terminal.size.height }, 2497 }, nav.root.getFocus()); 2498 _ = try terminal.render(&nav.root); 2499 try Repo.Events.performSync(allocator, session); 2500 }, 2501 } 2502 } 2503 2504 // reload so the next navigation builds its page from the current moment 2505 if (repo_maybe) |repo| try session.reloadMoment(allocator, repo); 2506 2507 // reconcile navigation: forward to a new page, or back on escape. 2508 // the terminal background can change at any time, so recheck it on each page 2509 if (try nav.sync(allocator, session)) try terminal.queryBackground(); 2510 2511 // the quit button (on the quit tab) asks the host to tear down. 2512 if (session.quit_requested) terminal.requestQuit(); 2513 2514 try nav.root.build(allocator, .{ 2515 .min_size = .{ .width = null, .height = null }, 2516 .max_size = .{ .width = terminal.size.width, .height = terminal.size.height }, 2517 }, nav.root.getFocus()); 2518 } 2519 } 2520 2521 fn showCopyableText(io: std.Io, copyable_text: []const u8) !void { 2522 const tty: ?std.Io.File = if (builtin.target.os.tag == .windows) 2523 null 2524 else 2525 try std.Io.Dir.cwd().openFile(io, "/dev/tty", .{ .mode = .read_write }); 2526 defer if (tty) |file| file.close(io); 2527 2528 const input = if (tty) |file| file else std.Io.File.stdin(); 2529 const output = if (tty) |file| file else std.Io.File.stdout(); 2530 2531 var write_buf: [1024]u8 = undefined; 2532 var writer = output.writer(io, &write_buf); 2533 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}); 2534 try writer.interface.flush(); 2535 2536 var read_buf: [1]u8 = undefined; 2537 var reader = input.reader(io, &read_buf); 2538 while (true) { 2539 const byte = try reader.interface.takeByte(); 2540 if (byte == '\r' or byte == '\n') return; 2541 } 2542 } 2543 2544 pub fn inputKey(allocator: std.mem.Allocator, root: *Widget, key: Key, session: *Session) !void { 2545 const root_focus = root.getFocus(); 2546 const focused_before = root_focus.grandchild_id; 2547 var activate_in_page_link = false; 2548 switch (key) { 2549 // request a navigation pop; the host's Nav.sync goes back a page, or 2550 // quits when there's no history left. 2551 .escape => { 2552 session.back = .requested; 2553 return; 2554 }, 2555 .ctrl => |letter| switch (letter) { 2556 'r' => { 2557 session.refresh_requested = true; 2558 return; 2559 }, 2560 else => try root.input(allocator, key, root_focus), 2561 }, 2562 .enter => { 2563 if (root_focus.grandchild_id) |gid| { 2564 // follow a cross-page link 2565 if (crossPageLink(root_focus, gid, session.data)) |route| { 2566 return session.navigate(route); 2567 } 2568 if (rawLink(root_focus, gid)) |url| return requestRawLink(session, url); 2569 } 2570 activate_in_page_link = true; 2571 try root.input(allocator, key, root_focus); 2572 }, 2573 .mouse => |mouse| { 2574 if (mouse.action == .press and mouse.action.press == .left) { 2575 if (cellPageLink(root, mouse.x, mouse.y, session.data)) |route| return session.navigate(route); 2576 if (root_focus.hitTest(mouse.x, mouse.y)) |hit| { 2577 const focus_id = hit.id; 2578 if (hit.kind == .background) { 2579 root_focus.setFocus(focus_id); 2580 return; 2581 } 2582 if (widget.isBackButton((root_focus.children.get(focus_id) orelse return).focus)) { 2583 if (session.back == .available) session.back = .requested; 2584 return; 2585 } 2586 // follow a cross-page link 2587 if (crossPageLink(root_focus, focus_id, session.data)) |route| { 2588 return session.navigate(route); 2589 } 2590 if (currentPageLink(root_focus, focus_id, session.data)) return; 2591 if (rawLink(root_focus, focus_id)) |url| { 2592 if (!mouse.ctrl) try requestRawLink(session, url); 2593 return; 2594 } 2595 root_focus.setFocus(focus_id); 2596 activate_in_page_link = true; 2597 } 2598 // forward the press into the widget tree so buttons (and any 2599 // future click-aware widgets) can react. widgets that don't 2600 // care about presses ignore it. 2601 try root.input(allocator, key, root_focus); 2602 } else { 2603 try root.input(allocator, key, root_focus); 2604 } 2605 }, 2606 .event => |event| switch (event) { 2607 .background => |rgb| session.terminal_background = rgb, 2608 .resize => try root.input(allocator, key, root_focus), 2609 }, 2610 else => try root.input(allocator, key, root_focus), 2611 } 2612 2613 const focused_after = root_focus.grandchild_id; 2614 if (!activate_in_page_link and focused_before == focused_after) return; 2615 const focus_id = focused_after orelse return; 2616 if (inPageLink(root_focus, focus_id, session.data)) |route| session.data.current_page = route; 2617 } 2618 2619 // a link to bytes the server serves directly rather than to a page route, so 2620 // it never resolves to a RoutablePage 2621 pub const raw_link_prefix = "ax:"; 2622 2623 // a route already loaded into the current page; focusing it changes the url 2624 // without rebuilding the page 2625 pub const in_page_link_prefix = "ai:"; 2626 2627 // an in-page tab's base route, or the exact current route when it is selected 2628 pub fn inPageTabLink(session: *Session, route: RoutablePage, selected: bool) ![]const u8 { 2629 const target = if (selected) session.data.current_page else route; 2630 return session.page_arena.allocator().print("{s}{s}", .{ in_page_link_prefix, try target.toUrl(session.page_arena) }); 2631 } 2632 2633 // a button the web renderer covers with a file picker that posts the chosen 2634 // file to the url after the prefix 2635 pub const file_input_prefix = "file:"; 2636 2637 // a submit button that overrides its enclosing form's action 2638 pub const submit_action_prefix = "submit:"; 2639 2640 // one option of a radio field, as `radio:<name>=<value>` 2641 pub const radio_prefix = "radio:"; 2642 2643 // the url an `ax:` link points at, or null for anything else. a host that 2644 // suppresses the anchor's own navigation needs this to follow the link. 2645 pub fn rawLink(root_focus: *Focus, focus_id: usize) ?[]const u8 { 2646 const child = root_focus.children.get(focus_id) orelse return null; 2647 const custom = switch (child.focus.kind) { 2648 .custom => |c| c, 2649 else => return null, 2650 }; 2651 if (!std.mem.startsWith(u8, custom, raw_link_prefix)) return null; 2652 return custom[raw_link_prefix.len..]; 2653 } 2654 2655 fn requestRawLink(session: *Session, url: []const u8) !void { 2656 session.host_request = .{ .show_copyable_text = try terminalWebUrl(session.page_arena.allocator(), session, url) }; 2657 } 2658 2659 pub fn terminalWebUrl(allocator: std.mem.Allocator, session: *const Session, path: []const u8) ![]const u8 { 2660 // an absolute url is already complete 2661 if (!std.mem.startsWith(u8, path, "/")) return path; 2662 return if (session.web_port) |port| 2663 try allocator.print("http://localhost:{d}{s}", .{ port, path }) 2664 else 2665 path; 2666 } 2667 2668 // if the focus target at focus_id is an `a:` link that should navigate (a 2669 // different parent page, or a different files directory within the repo page), 2670 // return its route; otherwise null. lets a host turn a click / enter on such a 2671 // link into a navigation rather than a focus change. 2672 pub fn crossPageLink(root_focus: *Focus, focus_id: usize, data: Session.Data) ?RoutablePage { 2673 const current = data.current_page; 2674 const route = pageLink(root_focus, focus_id, data, "a:") orelse return null; 2675 // a link to a different parent page always navigates; within a page, a 2676 // files-directory / commits-page / list-window change navigates while tab 2677 // links stay in-page. 2678 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; 2679 return null; 2680 } 2681 2682 // the page the clicked cell links to, from a link inside a text box's content 2683 fn cellPageLink(root: *Widget, x: usize, y: usize, data: Session.Data) ?RoutablePage { 2684 const grid = root.getGrid() orelse return null; 2685 const cell = grid.cell(x, y) catch return null; 2686 const link = cell.link orelse return null; 2687 if (link.len == 0 or link[0] != '/') return null; 2688 return if (data.host_kind == .local) RoutablePage.fromUrlLocal(link) else RoutablePage.fromUrl(link); 2689 } 2690 2691 // whether the `a:` focus target links to the page already shown, which a click 2692 // leaves alone rather than focusing 2693 pub fn currentPageLink(root_focus: *Focus, focus_id: usize, data: Session.Data) bool { 2694 const route = pageLink(root_focus, focus_id, data, "a:") orelse return false; 2695 return route.eql(data.current_page); 2696 } 2697 2698 // the route carried by an `ai:` focus target, or null for any other target 2699 pub fn inPageLink(root_focus: *Focus, focus_id: usize, data: Session.Data) ?RoutablePage { 2700 return pageLink(root_focus, focus_id, data, in_page_link_prefix); 2701 } 2702 2703 fn pageLink(root_focus: *Focus, focus_id: usize, data: Session.Data, prefix: []const u8) ?RoutablePage { 2704 const child = root_focus.children.get(focus_id) orelse return null; 2705 const custom = switch (child.focus.kind) { 2706 .custom => |c| c, 2707 else => return null, 2708 }; 2709 if (!std.mem.startsWith(u8, custom, prefix)) return null; 2710 const path = custom[prefix.len..]; 2711 // local sessions build (and parse) links with the repo identity elided 2712 return if (data.host_kind == .local) RoutablePage.fromUrlLocal(path) else RoutablePage.fromUrl(path); 2713 } 2714 2715 // a display author, resolved against the admin db at read time 2716 pub const Author = union(enum) { 2717 unknown, 2718 email: []const u8, // an email no user matches 2719 user_name: []const u8, 2720 2721 // the commit author line's email, resolved like initFromEmail 2722 pub fn init( 2723 haxy_moment: ?evt.AdminDB.HashMap(.read_only), 2724 arena: *std.heap.ArenaAllocator, 2725 author_line: []const u8, 2726 ) !Author { 2727 return initFromEmail(haxy_moment, arena, evt.authorEmail(author_line)); 2728 } 2729 2730 // from a record's stored author email: it resolves to the user currently 2731 // holding it, else stays the email. the result is allocated in `arena`, 2732 // so the email may borrow transient memory. 2733 pub fn initFromEmail( 2734 haxy_moment: ?evt.AdminDB.HashMap(.read_only), 2735 arena: *std.heap.ArenaAllocator, 2736 author_email: ?[]const u8, 2737 ) !Author { 2738 const email = author_email orelse return .unknown; 2739 if (haxy_moment) |moment| { 2740 if (try evt.User.readByEmail(evt.AdminDB, evt.admin_repo_opts.hash, moment, arena, email)) |user| { 2741 return .{ .user_name = user.name }; 2742 } 2743 } 2744 return .{ .email = try arena.allocator().dupe(u8, email) }; 2745 } 2746 }; 2747 2748 // the "a:" link to user `name`'s page. 2749 pub fn userLink(page_arena: *std.heap.ArenaAllocator, name: []const u8) ![]const u8 { 2750 const parsed = RoutablePage.Array(evt.User.name_max_len).from(name) orelse return error.RouteTooLong; 2751 const url = try (RoutablePage{ .user_repos = .{ .name = parsed } }).toUrl(page_arena); 2752 return page_arena.allocator().print("a:{s}", .{url}); 2753 } 2754 2755 // a focusable " author " box showing `author`, linking to their user page 2756 // when it is a known user 2757 pub fn authorBox(allocator: std.mem.Allocator, page_arena: *std.heap.ArenaAllocator, author: Author) !wgt.TextBox { 2758 const text = switch (author) { 2759 .unknown => "", 2760 .email, .user_name => |t| t, 2761 }; 2762 var tb = try wgt.TextBox.init(allocator, text, .{ .border = .single, .round_corners = true, .wrap_kind = .none, .top_label = .{ .text = " author " } }); 2763 errdefer tb.deinit(allocator); 2764 tb.getFocus().mode = .all; 2765 switch (author) { 2766 .user_name => |name| tb.getFocus().kind = .{ .custom = try userLink(page_arena, name) }, 2767 else => {}, 2768 } 2769 return tb; 2770 } 2771 2772 // native-TUI navigation 2773 pub const Nav = struct { 2774 root: Widget, 2775 // backs the current page (its Page data and the page-scoped strings its 2776 // widgets build). owned here, swapped on each navigation. session.page_arena 2777 // tracks whichever of these is current so widgets allocate into it. 2778 arena: *std.heap.ArenaAllocator, 2779 // the login the current root was built for 2780 user_id: ?[evt.event_id_size]u8, 2781 history: std.ArrayList(Entry), 2782 2783 // each retained page keeps its own arena, freed when the page leaves the 2784 // stack (popped on back, evicted at cap, or on deinit). this is what keeps a 2785 // long-lived session from accumulating every page it ever visited. 2786 const Entry = struct { root: Widget, route: RoutablePage, arena: *std.heap.ArenaAllocator, user_id: ?[evt.event_id_size]u8 }; 2787 2788 // cap on retained back-history so the chain can't grow memory without bound 2789 const max_history: usize = 16; 2790 2791 pub fn init(allocator: std.mem.Allocator, session: *Session) !Nav { 2792 session.back = .unavailable; 2793 const arena = try allocator.create(std.heap.ArenaAllocator); 2794 arena.* = std.heap.ArenaAllocator.init(allocator); 2795 errdefer { 2796 arena.deinit(); 2797 allocator.destroy(arena); 2798 } 2799 2800 return .{ 2801 .root = try initCurrentRoot(allocator, arena, session), 2802 .arena = arena, 2803 .user_id = session.userId(), 2804 .history = .empty, 2805 }; 2806 } 2807 2808 pub fn deinit(self: *Nav, allocator: std.mem.Allocator) void { 2809 self.root.deinit(allocator); 2810 freeArena(allocator, self.arena); 2811 for (self.history.items) |*entry| { 2812 entry.root.deinit(allocator); 2813 freeArena(allocator, entry.arena); 2814 } 2815 self.history.deinit(allocator); 2816 } 2817 2818 // rebuild the current page in place from a current moment 2819 fn rebuild(self: *Nav, allocator: std.mem.Allocator, session: *Session) !void { 2820 if (session.haxy_moment == null and session.local == null) return; 2821 const arena = try allocator.create(std.heap.ArenaAllocator); 2822 arena.* = std.heap.ArenaAllocator.init(allocator); 2823 errdefer freeArena(allocator, arena); 2824 2825 const new_root = try initCurrentRoot(allocator, arena, session); 2826 2827 self.root.deinit(allocator); 2828 freeArena(allocator, self.arena); 2829 self.root = new_root; 2830 self.arena = arena; 2831 self.user_id = session.userId(); 2832 } 2833 2834 // build the current page's root in `arena`, or the not-found page's when 2835 // the route names nothing 2836 fn initCurrentRoot(allocator: std.mem.Allocator, arena: *std.heap.ArenaAllocator, session: *Session) !Widget { 2837 session.page_arena = arena; 2838 const page = try arena.allocator().create(Page); 2839 page.* = Page.init(arena, session, session.data.current_page) catch |err| switch (err) { 2840 error.NotFound => blk: { 2841 session.data.current_page = .not_found; 2842 break :blk .not_found; 2843 }, 2844 else => |e| return e, 2845 }; 2846 return initRoot(allocator, page, session); 2847 } 2848 2849 fn freeArena(allocator: std.mem.Allocator, arena: *std.heap.ArenaAllocator) void { 2850 arena.deinit(); 2851 allocator.destroy(arena); 2852 } 2853 2854 // reconcile the displayed root with the session's navigation state. a 2855 // forward nav (current_page moved to a different parent page) pushes the 2856 // current root and builds the new page in a fresh arena; a back request 2857 // frees the current page and restores the previous one. when escape is 2858 // pressed with no history left we switch to the quit tab instead of quitting. 2859 // returns whether the root was replaced. 2860 pub fn sync(self: *Nav, allocator: std.mem.Allocator, session: *Session) !bool { 2861 // refresh: rebuild the current page in place from a current moment 2862 if (session.refresh_requested) { 2863 session.refresh_requested = false; 2864 try self.rebuild(allocator, session); 2865 return true; 2866 } 2867 2868 if (session.back == .requested) { 2869 if (self.history.pop()) |entry| { 2870 session.back = if (self.history.items.len == 0) .unavailable else .available; 2871 self.root.deinit(allocator); 2872 freeArena(allocator, self.arena); 2873 self.root = entry.root; 2874 self.arena = entry.arena; 2875 self.user_id = entry.user_id; 2876 session.page_arena = entry.arena; 2877 session.data.current_page = entry.route; 2878 // a page built under another login is rebuilt rather than restored 2879 if (!std.meta.eql(entry.user_id, session.userId())) { 2880 try self.rebuild(allocator, session); 2881 return true; 2882 } 2883 chooseAnsiArtForNavigation(session); 2884 return true; 2885 } 2886 session.back = .unavailable; 2887 // nothing to go back to; switch to the quit confirmation 2888 const root_focus = self.root.getFocus(); 2889 var iter = root_focus.children.iterator(); 2890 while (iter.next()) |entry| { 2891 switch (entry.value_ptr.focus.kind) { 2892 .custom => |custom| if (std.mem.eql(u8, custom, Quit.tab_kind)) { 2893 root_focus.setFocus(entry.key_ptr.*); 2894 // a Stack only builds its selected child, so the quit 2895 // button isn't in the focus tree until a build runs with 2896 // the quit tab selected. build once, then send a 2897 // synthetic arrow_down to drop focus from the tab onto 2898 // the button so it's ready to confirm. 2899 try self.root.build(allocator, .{ 2900 .min_size = .{ .width = null, .height = 40 }, 2901 .max_size = .{ .width = 80, .height = null }, 2902 }, root_focus); 2903 try self.root.input(allocator, .arrow_down, root_focus); 2904 break; 2905 }, 2906 else => {}, 2907 } 2908 } 2909 return false; 2910 } 2911 2912 // forward navigation: navigate() set next_page to the page to move to (a 2913 // cross-page link or tab change crossing pages) 2914 if (session.next_page) |route| { 2915 session.next_page = null; 2916 if (session.haxy_moment == null and session.local == null) return false; 2917 const previous_route = session.data.current_page; 2918 // the page we navigated to becomes the current page 2919 session.data.current_page = route; 2920 session.back = .available; 2921 2922 const arena = try allocator.create(std.heap.ArenaAllocator); 2923 arena.* = std.heap.ArenaAllocator.init(allocator); 2924 errdefer freeArena(allocator, arena); 2925 2926 const new_root = try initCurrentRoot(allocator, arena, session); 2927 2928 try self.history.append(allocator, .{ .root = self.root, .route = previous_route, .arena = self.arena, .user_id = self.user_id }); 2929 // drop the oldest entry (freeing its widget tree and arena) once over cap 2930 if (self.history.items.len > max_history) { 2931 var oldest = self.history.orderedRemove(0); 2932 oldest.root.deinit(allocator); 2933 freeArena(allocator, oldest.arena); 2934 } 2935 self.root = new_root; 2936 self.arena = arena; 2937 self.user_id = session.userId(); 2938 return true; 2939 } 2940 return false; 2941 } 2942 }; 2943 2944 pub fn initRoot(allocator: std.mem.Allocator, page: *const Page, session: *Session) !Widget { 2945 const page_widget: Widget = switch (page.*) { 2946 .home => |*p| .{ .home = try .init(allocator, p, session) }, 2947 .user => |*p| .{ .user = try .init(allocator, p, session) }, 2948 .repo => |*p| .{ .repo = try .init(allocator, p, session) }, 2949 .fork => |*p| .{ .fork = try .init(allocator, p, session) }, 2950 .not_found => .{ .not_found = try .init(allocator, session) }, 2951 }; 2952 2953 chooseAnsiArtForNavigation(session); 2954 2955 // on the TUI/SSH, the page sits above a one-row footer showing its web 2956 // url, when there's a web UI to point at 2957 var root = if (session.is_terminal) blk: { 2958 var box = try wgt.Box(Widget).init(allocator, .{ .border = null, .direction = .vert }); 2959 errdefer box.deinit(allocator); 2960 const bg_id = bg_blk: { 2961 var background = try widget.AnsiBackground.init(allocator, page_widget, session); 2962 errdefer background.deinit(allocator); 2963 const id = background.getFocus().id; 2964 try box.children.put(allocator, id, .{ .widget = .{ .background = background }, .rect = null, .min_size = null }); 2965 break :bg_blk id; 2966 }; 2967 if (session.web_port != null) { 2968 var footer = try widget.Footer.init(allocator, session); 2969 errdefer footer.deinit(allocator); 2970 try box.children.put(allocator, footer.getFocus().id, .{ .widget = .{ .footer = footer }, .rect = null, .min_size = .{ .width = null, .height = 1 } }); 2971 } 2972 box.getFocus().child_id = bg_id; 2973 break :blk Widget{ .box = box }; 2974 } else Widget{ .background = try widget.AnsiBackground.init(allocator, page_widget, session) }; 2975 errdefer root.deinit(allocator); 2976 2977 // input-owning views build their TextInputs in init, so reset their 2978 // registrations here 2979 session.text_inputs.clearRetainingCapacity(); 2980 2981 try root.build(allocator, .{ 2982 .min_size = .{ .width = null, .height = 40 }, 2983 .max_size = .{ .width = 100, .height = null }, 2984 }, root.getFocus()); 2985 2986 return root; 2987 } 2988 2989 // native and server-side sessions choose from the embedded collection. WASM 2990 // keeps the art serialized by the server instead. 2991 fn chooseAnsiArtForNavigation(session: *Session) void { 2992 if (comptime ansi_art.art.len == 0) return; 2993 if (session.data.current_page == .not_found) { 2994 session.data.ansi_art = ansi_art.not_found; 2995 return; 2996 } 2997 const io = session.io orelse return; 2998 var random: usize = undefined; 2999 io.random(std.mem.asBytes(&random)); 3000 session.data.ansi_art = ansi_art.art[random % ansi_art.art.len]; 3001 } 3002