╭─────────────╮ │scroll to top│ ╰─────────────╯ ╭ ui.zig ───────────────────────────────────────────────────────╮ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ ╰───────────────────────────────────────────────────────────────╯
🬐 🬠 🬞🬂🬏 🬟 🬑 🬟 🬑 ╭4e6997b2..╮ 4e6997b2.. see-em: 🬋🬋🬋 🬋🬋🬋 🬋 🬋 │files │ commits refs discuss issues new login 🬐 🬠 🬐 🬠 🬑 🬟 🬰 ╰──────────╯ (663) 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
2547 // when a panic/segfault happens 2548 term.setActive(&terminal); 2549 defer term.setActive(null); 2550 2551 try terminal.queryBackground(); 2552 2553 while (!terminal.shouldQuit()) { 2554 const grid_changed = try terminal.render(&nav.root); 2555 2556 // process any inputs. 2557 // 2558 // if the grid didn't change, then first do a blocking 2559 // read, so the thread will sleep until further input. 2560 // after that, all remaining reads are non-blocking so 2561 // we can process the rest of the queued inputs. 2562 // 2563 // if the grid *did* change, then only do non-blocking 2564 // reads. we do not want to sleep the thread because 2565 // there may be an animation that requires more looping. 2566 var blocking = !grid_changed; 2567 while (try terminal.readKey(io, blocking)) |key| { 2568 blocking = false; 2569 try inputKey(allocator, &nav.root, key, session); 2570 } 2571 2572 if (session.host_request) |request| { 2573 session.host_request = null; 2574 switch (request) { 2575 .show_copyable_text => |copyable_text| { 2576 term.setActive(null); 2577 terminal.deinit(io); 2578 terminal_live = false; 2579 showCopyableText(io, copyable_text) catch |show_err| { 2580 terminal = try term.Terminal.init(io, allocator); 2581 terminal_live = true; 2582 term.setActive(&terminal); 2583 return show_err; 2584 }; 2585 terminal = try term.Terminal.init(io, allocator); 2586 terminal.render_state.no_color = !session.color; 2587 terminal_live = true; 2588 term.setActive(&terminal); 2589 }, 2590 .undo => |target| Repo.Undo.handleRequest(allocator, session, target), 2591 .sync_events => { 2592 try nav.root.build(allocator, .{ 2593 .min_size = .{ .width = null, .height = null }, 2594 .max_size = .{ .width = terminal.size.width, .height = terminal.size.height }, 2595 }, nav.root.getFocus()); 2596 _ = try terminal.render(&nav.root); 2597 try Repo.Events.performSync(allocator, session); 2598 }, 2599 } 2600 } 2601 2602 // reload so the next navigation builds its page from the current moment 2603 if (repo_maybe) |repo| try session.reloadMoment(allocator, repo); 2604 2605 // reconcile navigation: forward to a new page, or back on escape. 2606 // the terminal background can change at any time, so recheck it on each page 2607 if (try nav.sync(allocator, session)) try terminal.queryBackground(); 2608 2609 // the quit button (on the quit tab) asks the host to tear down. 2610 if (session.quit_requested) terminal.requestQuit(); 2611 2612 try nav.root.build(allocator, .{ 2613 .min_size = .{ .width = null, .height = null }, 2614 .max_size = .{ .width = terminal.size.width, .height = terminal.size.height }, 2615 }, nav.root.getFocus()); 2616 } 2617 } 2618 2619 fn showCopyableText(io: std.Io, copyable_text: []const u8) !void { 2620 const tty: ?std.Io.File = if (builtin.target.os.tag == .windows) 2621 null 2622 else 2623 try std.Io.Dir.cwd().openFile(io, "/dev/tty", .{ .mode = .read_write }); 2624 defer if (tty) |file| file.close(io); 2625 2626 const input = if (tty) |file| file else std.Io.File.stdin(); 2627 const output = if (tty) |file| file else std.Io.File.stdout(); 2628 2629 var write_buf: [1024]u8 = undefined; 2630 var writer = output.writer(io, &write_buf); 2631 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}); 2632 try writer.interface.flush(); 2633 2634 var read_buf: [1]u8 = undefined; 2635 var reader = input.reader(io, &read_buf); 2636 while (true) { 2637 const byte = try reader.interface.takeByte(); 2638 if (byte == '\r' or byte == '\n') return; 2639 } 2640 } 2641 2642 pub fn inputKey(allocator: std.mem.Allocator, root: *Widget, key: Key, session: *Session) !void { 2643 const root_focus = root.getFocus(); 2644 const focused_before = root_focus.grandchild_id; 2645 var activate_in_page_link = false; 2646 switch (key) { 2647 // request a navigation pop; the host's Nav.sync goes back a page, or 2648 // quits when there's no history left. 2649 .escape => { 2650 session.back = .requested; 2651 return; 2652 }, 2653 .ctrl => |letter| switch (letter) { 2654 'r' => { 2655 session.refresh_requested = true; 2656 return; 2657 }, 2658 else => try root.input(allocator, key, root_focus), 2659 }, 2660 .enter => { 2661 if (root_focus.grandchild_id) |gid| { 2662 // follow a cross-page link 2663 if (crossPageLink(root_focus, gid, session.data)) |route| { 2664 return session.navigate(route); 2665 } 2666 if (rawLink(root_focus, gid)) |url| return requestRawLink(session, url); 2667 } 2668 activate_in_page_link = true; 2669 try root.input(allocator, key, root_focus); 2670 }, 2671 .mouse => |mouse| { 2672 if (mouse.action == .press and mouse.action.press == .left) { 2673 if (cellPageLink(root, mouse.x, mouse.y, session.data)) |route| return session.navigate(route); 2674 if (root_focus.hitTest(mouse.x, mouse.y)) |hit| { 2675 const focus_id = hit.id; 2676 if (hit.kind == .background) { 2677 root_focus.setFocus(focus_id); 2678 return; 2679 } 2680 if (widget.isBackButton((root_focus.children.get(focus_id) orelse return).focus)) { 2681 if (session.back == .available) session.back = .requested; 2682 return; 2683 } 2684 // follow a cross-page link 2685 if (crossPageLink(root_focus, focus_id, session.data)) |route| { 2686 return session.navigate(route); 2687 } 2688 if (currentPageLink(root_focus, focus_id, session.data)) return; 2689 if (rawLink(root_focus, focus_id)) |url| { 2690 if (!mouse.ctrl) try requestRawLink(session, url); 2691 return; 2692 } 2693 root_focus.setFocus(focus_id); 2694 activate_in_page_link = true; 2695 } 2696 // forward the press into the widget tree so buttons (and any 2697 // future click-aware widgets) can react. widgets that don't 2698 // care about presses ignore it. 2699 try root.input(allocator, key, root_focus); 2700 } else { 2701 try root.input(allocator, key, root_focus); 2702 } 2703 }, 2704 .event => |event| switch (event) { 2705 .background => |rgb| session.terminal_background = rgb, 2706 .resize => try root.input(allocator, key, root_focus), 2707 }, 2708 else => try root.input(allocator, key, root_focus), 2709 } 2710 2711 const focused_after = root_focus.grandchild_id; 2712 if (!activate_in_page_link and focused_before == focused_after) return; 2713 const focus_id = focused_after orelse return; 2714 if (inPageLink(root_focus, focus_id, session.data)) |route| session.data.current_page = route; 2715 } 2716 2717 // a link to bytes the server serves directly rather than to a page route, so 2718 // it never resolves to a RoutablePage 2719 pub const raw_link_prefix = "ax:"; 2720 2721 // a route already loaded into the current page; focusing it changes the url 2722 // without rebuilding the page 2723 pub const in_page_link_prefix = "ai:"; 2724 2725 // an in-page tab's base route, or the exact current route when it is selected 2726 pub fn inPageTabLink(session: *Session, route: RoutablePage, selected: bool) ![]const u8 { 2727 const target = if (selected) session.data.current_page else route; 2728 return session.page_arena.allocator().print("{s}{s}", .{ in_page_link_prefix, try target.toUrl(session.page_arena) }); 2729 } 2730 2731 // a button the web renderer covers with a file picker that posts the chosen 2732 // file to the url after the prefix 2733 pub const file_input_prefix = "file:"; 2734 2735 // a submit button that overrides its enclosing form's action 2736 pub const submit_action_prefix = "submit:"; 2737 2738 // one option of a radio field, as `radio:<name>=<value>` 2739 pub const radio_prefix = "radio:"; 2740 2741 // the url an `ax:` link points at, or null for anything else. a host that 2742 // suppresses the anchor's own navigation needs this to follow the link. 2743 pub fn rawLink(root_focus: *Focus, focus_id: usize) ?[]const u8 { 2744 const child = root_focus.children.get(focus_id) orelse return null; 2745 const custom = switch (child.focus.kind) { 2746 .custom => |c| c, 2747 else => return null, 2748 }; 2749 if (!std.mem.startsWith(u8, custom, raw_link_prefix)) return null; 2750 return custom[raw_link_prefix.len..]; 2751 } 2752 2753 fn requestRawLink(session: *Session, url: []const u8) !void { 2754 session.host_request = .{ .show_copyable_text = try terminalWebUrl(session.page_arena.allocator(), session, url) }; 2755 } 2756 2757 pub fn terminalWebUrl(allocator: std.mem.Allocator, session: *const Session, path: []const u8) ![]const u8 { 2758 // an absolute url is already complete 2759 if (!std.mem.startsWith(u8, path, "/")) return path; 2760 return if (session.web_port) |port| 2761 try allocator.print("http://localhost:{d}{s}", .{ port, path }) 2762 else 2763 path; 2764 } 2765 2766 // if the focus target at focus_id is an `a:` link that should navigate (a 2767 // different parent page, or a different files directory within the repo page), 2768 // return its route; otherwise null. lets a host turn a click / enter on such a 2769 // link into a navigation rather than a focus change. 2770 pub fn crossPageLink(root_focus: *Focus, focus_id: usize, data: Session.Data) ?RoutablePage { 2771 const current = data.current_page; 2772 const route = pageLink(root_focus, focus_id, data, "a:") orelse return null; 2773 // a link to a different parent page always navigates; within a page, a 2774 // files-directory / commits-page / list-window change navigates while tab 2775 // links stay in-page. 2776 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; 2777 return null; 2778 } 2779 2780 // the page the clicked cell links to, from a link inside a text box's content 2781 fn cellPageLink(root: *Widget, x: usize, y: usize, data: Session.Data) ?RoutablePage { 2782 const grid = root.getGrid() orelse return null; 2783 const cell = grid.cell(x, y) catch return null; 2784 const link = cell.link orelse return null; 2785 if (link.len == 0 or link[0] != '/') return null; 2786 return if (data.host_kind == .local) RoutablePage.fromUrlLocal(link) else RoutablePage.fromUrl(link); 2787 } 2788 2789 // whether the `a:` focus target links to the page already shown, which a click 2790 // leaves alone rather than focusing 2791 pub fn currentPageLink(root_focus: *Focus, focus_id: usize, data: Session.Data) bool { 2792 const route = pageLink(root_focus, focus_id, data, "a:") orelse return false; 2793 return route.eql(data.current_page); 2794 } 2795 2796 // the route carried by an `ai:` focus target, or null for any other target 2797 pub fn inPageLink(root_focus: *Focus, focus_id: usize, data: Session.Data) ?RoutablePage { 2798 return pageLink(root_focus, focus_id, data, in_page_link_prefix); 2799 } 2800 2801 fn pageLink(root_focus: *Focus, focus_id: usize, data: Session.Data, prefix: []const u8) ?RoutablePage { 2802 const child = root_focus.children.get(focus_id) orelse return null; 2803 const custom = switch (child.focus.kind) { 2804 .custom => |c| c, 2805 else => return null, 2806 }; 2807 if (!std.mem.startsWith(u8, custom, prefix)) return null; 2808 const path = custom[prefix.len..]; 2809 // local sessions build (and parse) links with the repo identity elided 2810 return if (data.host_kind == .local) RoutablePage.fromUrlLocal(path) else RoutablePage.fromUrl(path); 2811 } 2812 2813 // an assignee as the detail view shows it: the stored email, and the name of 2814 // the user holding it on this instance when there is one 2815 pub const Assignee = struct { 2816 email: []const u8, 2817 name: ?[]const u8 = null, 2818 2819 pub fn display(self: Assignee) []const u8 { 2820 return self.name orelse self.email; 2821 } 2822 }; 2823 2824 // a display author, resolved against the admin db at read time 2825 pub const Author = union(enum) { 2826 unknown, 2827 email: []const u8, // an email no user matches 2828 user_name: []const u8, 2829 2830 // the commit author line's email, resolved like initFromEmail 2831 pub fn init( 2832 haxy_moment: ?evt.AdminDB.HashMap(.read_only), 2833 arena: *std.heap.ArenaAllocator, 2834 author_line: []const u8, 2835 ) !Author { 2836 return initFromEmail(haxy_moment, arena, evt.authorEmail(author_line)); 2837 } 2838 2839 // from a record's stored author email: it resolves to the user currently 2840 // holding it, else stays the email. the result is allocated in `arena`, 2841 // so the email may borrow transient memory. 2842 pub fn initFromEmail( 2843 haxy_moment: ?evt.AdminDB.HashMap(.read_only), 2844 arena: *std.heap.ArenaAllocator, 2845 author_email: ?[]const u8, 2846 ) !Author { 2847 const email = author_email orelse return .unknown; 2848 if (haxy_moment) |moment| { 2849 if (try evt.User.readByEmail(evt.AdminDB, evt.admin_repo_opts.hash, moment, arena, email)) |user| { 2850 return .{ .user_name = user.name }; 2851 } 2852 } 2853 return .{ .email = try arena.allocator().dupe(u8, email) }; 2854 } 2855 }; 2856 2857 // the "a:" link to user `name`'s page. 2858 pub fn userLink(page_arena: *std.heap.ArenaAllocator, name: []const u8) ![]const u8 { 2859 const parsed = RoutablePage.Array(evt.User.name_max_len).from(name) orelse return error.RouteTooLong; 2860 const url = try (RoutablePage{ .user_repos = .{ .name = parsed } }).toUrl(page_arena); 2861 return page_arena.allocator().print("a:{s}", .{url}); 2862 } 2863 2864 // a focusable " author " box showing `author`, linking to their user page 2865 // when it is a known user 2866 pub fn authorBox(allocator: std.mem.Allocator, page_arena: *std.heap.ArenaAllocator, author: Author) !wgt.TextBox { 2867 const text = switch (author) { 2868 .unknown => "", 2869 .email, .user_name => |t| t, 2870 }; 2871 var tb = try wgt.TextBox.init(allocator, text, .{ .border = .single, .round_corners = true, .wrap_kind = .none, .top_label = .{ .text = " author " } }); 2872 errdefer tb.deinit(allocator); 2873 tb.getFocus().mode = .all; 2874 switch (author) { 2875 .user_name => |name| tb.getFocus().kind = .{ .custom = try userLink(page_arena, name) }, 2876 else => {}, 2877 } 2878 return tb; 2879 } 2880 2881 // native-TUI navigation 2882 pub const Nav = struct { 2883 root: Widget, 2884 // backs the current page (its Page data and the page-scoped strings its 2885 // widgets build). owned here, swapped on each navigation. session.page_arena 2886 // tracks whichever of these is current so widgets allocate into it. 2887 arena: *std.heap.ArenaAllocator, 2888 // the login the current root was built for 2889 user_id: ?[evt.event_id_size]u8, 2890 history: std.ArrayList(Entry), 2891 2892 // each retained page keeps its own arena, freed when the page leaves the 2893 // stack (popped on back, evicted at cap, or on deinit). this is what keeps a 2894 // long-lived session from accumulating every page it ever visited. 2895 const Entry = struct { root: Widget, route: RoutablePage, arena: *std.heap.ArenaAllocator, user_id: ?[evt.event_id_size]u8 }; 2896 2897 // cap on retained back-history so the chain can't grow memory without bound 2898 const max_history: usize = 16; 2899 2900 pub fn init(allocator: std.mem.Allocator, session: *Session) !Nav { 2901 session.back = .unavailable; 2902 const arena = try allocator.create(std.heap.ArenaAllocator); 2903 arena.* = std.heap.ArenaAllocator.init(allocator); 2904 errdefer { 2905 arena.deinit(); 2906 allocator.destroy(arena); 2907 } 2908 2909 return .{ 2910 .root = try initCurrentRoot(allocator, arena, session), 2911 .arena = arena, 2912 .user_id = session.userId(), 2913 .history = .empty, 2914 }; 2915 } 2916 2917 pub fn deinit(self: *Nav, allocator: std.mem.Allocator) void { 2918 self.root.deinit(allocator); 2919 freeArena(allocator, self.arena); 2920 for (self.history.items) |*entry| { 2921 entry.root.deinit(allocator); 2922 freeArena(allocator, entry.arena); 2923 } 2924 self.history.deinit(allocator); 2925 } 2926 2927 // rebuild the current page in place from a current moment 2928 fn rebuild(self: *Nav, allocator: std.mem.Allocator, session: *Session) !void { 2929 if (session.haxy_moment == null and session.local == null) return; 2930 const arena = try allocator.create(std.heap.ArenaAllocator); 2931 arena.* = std.heap.ArenaAllocator.init(allocator); 2932 errdefer freeArena(allocator, arena); 2933 2934 const new_root = try initCurrentRoot(allocator, arena, session); 2935 2936 self.root.deinit(allocator); 2937 freeArena(allocator, self.arena); 2938 self.root = new_root; 2939 self.arena = arena; 2940 self.user_id = session.userId(); 2941 } 2942 2943 // build the current page's root in `arena`, or the not-found page's when 2944 // the route names nothing 2945 fn initCurrentRoot(allocator: std.mem.Allocator, arena: *std.heap.ArenaAllocator, session: *Session) !Widget { 2946 session.page_arena = arena; 2947 const page = try arena.allocator().create(Page); 2948 page.* = Page.init(arena, session, session.data.current_page) catch |err| switch (err) { 2949 error.NotFound => blk: { 2950 session.data.current_page = .not_found; 2951 break :blk .not_found; 2952 }, 2953 else => |e| return e, 2954 }; 2955 return initRoot(allocator, page, session); 2956 } 2957 2958 fn freeArena(allocator: std.mem.Allocator, arena: *std.heap.ArenaAllocator) void { 2959 arena.deinit(); 2960 allocator.destroy(arena); 2961 } 2962 2963 // reconcile the displayed root with the session's navigation state. a 2964 // forward nav (current_page moved to a different parent page) pushes the 2965 // current root and builds the new page in a fresh arena; a back request 2966 // frees the current page and restores the previous one. when escape is 2967 // pressed with no history left we switch to the quit tab instead of quitting. 2968 // returns whether the root was replaced. 2969 pub fn sync(self: *Nav, allocator: std.mem.Allocator, session: *Session) !bool { 2970 // refresh: rebuild the current page in place from a current moment 2971 if (session.refresh_requested) { 2972 session.refresh_requested = false; 2973 try self.rebuild(allocator, session); 2974 return true; 2975 } 2976 2977 if (session.back == .requested) { 2978 if (self.history.pop()) |entry| { 2979 session.back = if (self.history.items.len == 0) .unavailable else .available; 2980 self.root.deinit(allocator); 2981 freeArena(allocator, self.arena); 2982 self.root = entry.root; 2983 self.arena = entry.arena; 2984 self.user_id = entry.user_id; 2985 session.page_arena = entry.arena; 2986 session.data.current_page = entry.route; 2987 // a page built under another login is rebuilt rather than restored 2988 if (!std.meta.eql(entry.user_id, session.userId())) { 2989 try self.rebuild(allocator, session); 2990 return true; 2991 } 2992 chooseAnsiArtForNavigation(session); 2993 return true; 2994 } 2995 session.back = .unavailable; 2996 // nothing to go back to; switch to the quit confirmation 2997 const root_focus = self.root.getFocus(); 2998 var iter = root_focus.children.iterator(); 2999 while (iter.next()) |entry| { 3000 switch (entry.value_ptr.focus.kind) { 3001 .custom => |custom| if (std.mem.eql(u8, custom, Quit.tab_kind)) { 3002 root_focus.setFocus(entry.key_ptr.*); 3003 // a Stack only builds its selected child, so the quit 3004 // button isn't in the focus tree until a build runs with 3005 // the quit tab selected. build once, then send a 3006 // synthetic arrow_down to drop focus from the tab onto 3007 // the button so it's ready to confirm. 3008 try self.root.build(allocator, .{ 3009 .min_size = .{ .width = null, .height = 40 }, 3010 .max_size = .{ .width = 80, .height = null }, 3011 }, root_focus); 3012 try self.root.input(allocator, .arrow_down, root_focus); 3013 break; 3014 }, 3015 else => {}, 3016 } 3017 } 3018 return false; 3019 } 3020 3021 // forward navigation: navigate() set next_page to the page to move to (a 3022 // cross-page link or tab change crossing pages) 3023 if (session.next_page) |route| { 3024 session.next_page = null; 3025 if (session.haxy_moment == null and session.local == null) return false; 3026 const previous_route = session.data.current_page; 3027 // the page we navigated to becomes the current page 3028 session.data.current_page = route; 3029 session.back = .available; 3030 3031 const arena = try allocator.create(std.heap.ArenaAllocator); 3032 arena.* = std.heap.ArenaAllocator.init(allocator); 3033 errdefer freeArena(allocator, arena); 3034 3035 const new_root = try initCurrentRoot(allocator, arena, session); 3036 3037 try self.history.append(allocator, .{ .root = self.root, .route = previous_route, .arena = self.arena, .user_id = self.user_id }); 3038 // drop the oldest entry (freeing its widget tree and arena) once over cap 3039 if (self.history.items.len > max_history) { 3040 var oldest = self.history.orderedRemove(0); 3041 oldest.root.deinit(allocator); 3042 freeArena(allocator, oldest.arena); 3043 } 3044 self.root = new_root; 3045 self.arena = arena; 3046 self.user_id = session.userId(); 3047 return true; 3048 } 3049 return false; 3050 } 3051 }; 3052 3053 pub fn initRoot(allocator: std.mem.Allocator, page: *const Page, session: *Session) !Widget { 3054 const page_widget: Widget = switch (page.*) { 3055 .home => |*p| .{ .home = try .init(allocator, p, session) }, 3056 .user => |*p| .{ .user = try .init(allocator, p, session) }, 3057 .repo => |*p| .{ .repo = try .init(allocator, p, session) }, 3058 .fork => |*p| .{ .fork = try .init(allocator, p, session) }, 3059 .not_found => .{ .not_found = try .init(allocator, session) }, 3060 }; 3061 3062 chooseAnsiArtForNavigation(session); 3063 3064 // on the TUI/SSH, the page sits above a one-row footer showing its web 3065 // url, when there's a web UI to point at 3066 var root = if (session.is_terminal) blk: { 3067 var box = try wgt.Box(Widget).init(allocator, .{ .border = null, .direction = .vert }); 3068 errdefer box.deinit(allocator); 3069 const bg_id = bg_blk: { 3070 var background = try widget.AnsiBackground.init(allocator, page_widget, session); 3071 errdefer background.deinit(allocator); 3072 const id = background.getFocus().id; 3073 try box.children.put(allocator, id, .{ .widget = .{ .background = background }, .rect = null, .min_size = null }); 3074 break :bg_blk id; 3075 }; 3076 if (session.web_port != null) { 3077 var footer = try widget.Footer.init(allocator, session); 3078 errdefer footer.deinit(allocator); 3079 try box.children.put(allocator, footer.getFocus().id, .{ .widget = .{ .footer = footer }, .rect = null, .min_size = .{ .width = null, .height = 1 } }); 3080 } 3081 box.getFocus().child_id = bg_id; 3082 break :blk Widget{ .box = box }; 3083 } else Widget{ .background = try widget.AnsiBackground.init(allocator, page_widget, session) }; 3084 errdefer root.deinit(allocator); 3085 3086 // input-owning views build their TextInputs in init, so reset their 3087 // registrations here 3088 session.text_inputs.clearRetainingCapacity(); 3089 3090 try root.build(allocator, .{ 3091 .min_size = .{ .width = null, .height = 40 }, 3092 .max_size = .{ .width = 100, .height = null }, 3093 }, root.getFocus()); 3094 3095 return root; 3096 } 3097 3098 // native and server-side sessions choose from the embedded collection. WASM 3099 // keeps the art serialized by the server instead. 3100 fn chooseAnsiArtForNavigation(session: *Session) void { 3101 if (comptime ansi_art.art.len == 0) return; 3102 if (session.data.current_page == .not_found) { 3103 session.data.ansi_art = ansi_art.not_found; 3104 return; 3105 } 3106 const io = session.io orelse return; 3107 var random: usize = undefined; 3108 io.random(std.mem.asBytes(&random)); 3109 session.data.ansi_art = ansi_art.art[random % ansi_art.art.len]; 3110 } 3111