╭─────────────╮ │scroll to top│ ╰─────────────╯ ╭ ui.zig ───────────────────────────────────────────────────────╮ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ ╰───────────────────────────────────────────────────────────────╯
🬐 🬠 🬞🬂🬏 🬟 🬑 🬟 🬑 ╭f84e01fc..╮ f84e01fc.. see-em: 🬋🬋🬋 🬋🬋🬋 🬋 🬋 │files │ commits refs discuss issues new login 🬐 🬠 🬐 🬠 🬑 🬟 🬰 ╰──────────╯ (580) 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 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
2293 allocator: std.mem.Allocator, 2294 repo: *rp.Repo(.xit, evt.admin_repo_opts), 2295 ) !void { 2296 defer self.pending.clearRetainingCapacity(); 2297 for (self.pending.items) |action| { 2298 self.apply(action); 2299 switch (action) { 2300 .toggle_ansi => if (self.data.user_id) |user_id| { 2301 try evt.User.toggleAnsi(evt.admin_repo_opts, io, allocator, repo, user_id); 2302 }, 2303 } 2304 } 2305 } 2306 2307 // reload the moment from the admin repo and re-read user preferences 2308 pub fn reloadMoment(self: *Self, allocator: std.mem.Allocator, repo: *rp.Repo(.xit, evt.admin_repo_opts)) !void { 2309 const moment = try evt.currentMoment(evt.admin_repo_opts, repo); 2310 self.haxy_moment = moment; 2311 2312 const user_id = self.userId() orelse return; 2313 var arena = std.heap.ArenaAllocator.init(allocator); 2314 defer arena.deinit(); 2315 const user = (try activeUser(moment, &arena, user_id)) orelse return self.logOut(); 2316 self.data.enable_ansi = user.event.enable_ansi; 2317 } 2318 2319 // request a forward navigation to `route`; the host consumes next_page 2320 // (Nav.sync on the terminal, the wasm tick on the web). 2321 pub fn navigate(self: *Session, route: RoutablePage) !void { 2322 self.clearFormFeedback(); 2323 self.next_page = route; 2324 } 2325 }; 2326 2327 pub fn run(io: std.Io, allocator: std.mem.Allocator, session: *Session, repo_maybe: ?*rp.Repo(.xit, evt.admin_repo_opts)) !void { 2328 var nav = try Nav.init(allocator, session); 2329 defer nav.deinit(allocator); 2330 2331 var terminal = try term.Terminal.init(io, allocator); 2332 var terminal_live = true; 2333 defer if (terminal_live) terminal.deinit(io); 2334 2335 // set term as active so it will be properly cooked 2336 // when a panic/segfault happens 2337 term.setActive(&terminal); 2338 defer term.setActive(null); 2339 2340 while (!terminal.shouldQuit()) { 2341 const grid_changed = try terminal.render(&nav.root); 2342 2343 // process any inputs. 2344 // 2345 // if the grid didn't change, then first do a blocking 2346 // read, so the thread will sleep until further input. 2347 // after that, all remaining reads are non-blocking so 2348 // we can process the rest of the queued inputs. 2349 // 2350 // if the grid *did* change, then only do non-blocking 2351 // reads. we do not want to sleep the thread because 2352 // there may be an animation that requires more looping. 2353 var blocking = !grid_changed; 2354 while (try terminal.readKey(io, blocking)) |key| { 2355 blocking = false; 2356 try inputKey(allocator, &nav.root, key, session); 2357 } 2358 2359 if (session.host_request) |request| { 2360 session.host_request = null; 2361 switch (request) { 2362 .show_copyable_text => |copyable_text| { 2363 term.setActive(null); 2364 terminal.deinit(io); 2365 terminal_live = false; 2366 showCopyableText(io, copyable_text) catch |show_err| { 2367 terminal = try term.Terminal.init(io, allocator); 2368 terminal_live = true; 2369 term.setActive(&terminal); 2370 return show_err; 2371 }; 2372 terminal = try term.Terminal.init(io, allocator); 2373 terminal_live = true; 2374 term.setActive(&terminal); 2375 }, 2376 .undo => |target| Repo.Undo.handleRequest(allocator, session, target), 2377 .sync_events => { 2378 try nav.root.build(allocator, .{ 2379 .min_size = .{ .width = null, .height = null }, 2380 .max_size = .{ .width = terminal.size.width, .height = terminal.size.height }, 2381 }, nav.root.getFocus()); 2382 _ = try terminal.render(&nav.root); 2383 try Repo.Events.performSync(allocator, session); 2384 }, 2385 } 2386 } 2387 2388 // persist queued actions when there's a repo; local mode has none, 2389 // so just apply in-memory 2390 if (repo_maybe) |repo| { 2391 try session.applyAndWritePending(io, allocator, repo); 2392 // reload so the next navigation builds its page from the current moment 2393 try session.reloadMoment(allocator, repo); 2394 } else { 2395 session.applyPending(); 2396 } 2397 2398 // reconcile navigation: forward to a new page, or back on escape. 2399 try nav.sync(allocator, session); 2400 2401 // the quit button (on the quit tab) asks the host to tear down. 2402 if (session.quit_requested) terminal.requestQuit(); 2403 2404 try nav.root.build(allocator, .{ 2405 .min_size = .{ .width = null, .height = null }, 2406 .max_size = .{ .width = terminal.size.width, .height = terminal.size.height }, 2407 }, nav.root.getFocus()); 2408 } 2409 } 2410 2411 fn showCopyableText(io: std.Io, copyable_text: []const u8) !void { 2412 const tty: ?std.Io.File = if (builtin.os.tag == .windows) 2413 null 2414 else 2415 try std.Io.Dir.cwd().openFile(io, "/dev/tty", .{ .mode = .read_write }); 2416 defer if (tty) |file| file.close(io); 2417 2418 const input = if (tty) |file| file else std.Io.File.stdin(); 2419 const output = if (tty) |file| file else std.Io.File.stdout(); 2420 2421 var write_buf: [1024]u8 = undefined; 2422 var writer = output.writer(io, &write_buf); 2423 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}); 2424 try writer.interface.flush(); 2425 2426 var read_buf: [1]u8 = undefined; 2427 var reader = input.reader(io, &read_buf); 2428 while (true) { 2429 const byte = try reader.interface.takeByte(); 2430 if (byte == '\r' or byte == '\n') return; 2431 } 2432 } 2433 2434 pub fn inputKey(allocator: std.mem.Allocator, root: *Widget, key: Key, session: *Session) !void { 2435 const root_focus = root.getFocus(); 2436 const focused_before = root_focus.grandchild_id; 2437 var activate_in_page_link = false; 2438 switch (key) { 2439 // request a navigation pop; the host's Nav.sync goes back a page, or 2440 // quits when there's no history left. 2441 .escape => { 2442 session.back = .requested; 2443 return; 2444 }, 2445 .ctrl => |letter| switch (letter) { 2446 'r' => { 2447 session.refresh_requested = true; 2448 return; 2449 }, 2450 else => try root.input(allocator, key, root_focus), 2451 }, 2452 .enter => { 2453 if (root_focus.grandchild_id) |gid| { 2454 // follow a cross-page link 2455 if (crossPageLink(root_focus, gid, session.data)) |route| { 2456 return session.navigate(route); 2457 } 2458 if (rawLink(root_focus, gid)) |url| return requestRawLink(session, url); 2459 } 2460 activate_in_page_link = true; 2461 try root.input(allocator, key, root_focus); 2462 }, 2463 .mouse => |mouse| { 2464 if (mouse.action == .press and mouse.action.press == .left) { 2465 if (root_focus.hitTest(mouse.x, mouse.y)) |hit| { 2466 const focus_id = hit.id; 2467 if (hit.kind == .background) { 2468 root_focus.setFocus(focus_id); 2469 return; 2470 } 2471 if (widget.isBackButton((root_focus.children.get(focus_id) orelse return).focus)) { 2472 if (session.back == .available) session.back = .requested; 2473 return; 2474 } 2475 // follow a cross-page link 2476 if (crossPageLink(root_focus, focus_id, session.data)) |route| { 2477 return session.navigate(route); 2478 } 2479 if (rawLink(root_focus, focus_id)) |url| { 2480 if (!mouse.ctrl) try requestRawLink(session, url); 2481 return; 2482 } 2483 root_focus.setFocus(focus_id); 2484 activate_in_page_link = true; 2485 } 2486 // forward the press into the widget tree so buttons (and any 2487 // future click-aware widgets) can react. widgets that don't 2488 // care about presses ignore it. 2489 try root.input(allocator, key, root_focus); 2490 } else { 2491 try root.input(allocator, key, root_focus); 2492 } 2493 }, 2494 else => try root.input(allocator, key, root_focus), 2495 } 2496 2497 const focused_after = root_focus.grandchild_id; 2498 if (!activate_in_page_link and focused_before == focused_after) return; 2499 const focus_id = focused_after orelse return; 2500 if (inPageLink(root_focus, focus_id, session.data)) |route| session.data.current_page = route; 2501 } 2502 2503 // a link to bytes the server serves directly rather than to a page route, so 2504 // it never resolves to a RoutablePage 2505 pub const raw_link_prefix = "ax:"; 2506 2507 // a route already loaded into the current page; focusing it changes the url 2508 // without rebuilding the page 2509 pub const in_page_link_prefix = "ai:"; 2510 2511 // an in-page tab's base route, or the exact current route when it is selected 2512 pub fn inPageTabLink(session: *Session, route: RoutablePage, selected: bool) ![]const u8 { 2513 const target = if (selected) session.data.current_page else route; 2514 return std.fmt.allocPrint(session.page_arena.allocator(), "{s}{s}", .{ in_page_link_prefix, try target.toUrl(session.page_arena) }); 2515 } 2516 2517 // a button the web renderer covers with a file picker that posts the chosen 2518 // file to the url after the prefix 2519 pub const file_input_prefix = "file:"; 2520 2521 // a submit button that overrides its enclosing form's action 2522 pub const submit_action_prefix = "submit:"; 2523 2524 // the url an `ax:` link points at, or null for anything else. a host that 2525 // suppresses the anchor's own navigation needs this to follow the link. 2526 pub fn rawLink(root_focus: *Focus, focus_id: usize) ?[]const u8 { 2527 const child = root_focus.children.get(focus_id) orelse return null; 2528 const custom = switch (child.focus.kind) { 2529 .custom => |c| c, 2530 else => return null, 2531 }; 2532 if (!std.mem.startsWith(u8, custom, raw_link_prefix)) return null; 2533 return custom[raw_link_prefix.len..]; 2534 } 2535 2536 fn requestRawLink(session: *Session, url: []const u8) !void { 2537 session.host_request = .{ .show_copyable_text = try terminalWebUrl(session.page_arena.allocator(), session, url) }; 2538 } 2539 2540 pub fn terminalWebUrl(allocator: std.mem.Allocator, session: *const Session, path: []const u8) ![]const u8 { 2541 return if (session.web_port) |port| 2542 try std.fmt.allocPrint(allocator, "http://localhost:{d}{s}", .{ port, path }) 2543 else 2544 path; 2545 } 2546 2547 // if the focus target at focus_id is an `a:` link that should navigate (a 2548 // different parent page, or a different files directory within the repo page), 2549 // return its route; otherwise null. lets a host turn a click / enter on such a 2550 // link into a navigation rather than a focus change. 2551 pub fn crossPageLink(root_focus: *Focus, focus_id: usize, data: Session.Data) ?RoutablePage { 2552 const current = data.current_page; 2553 const route = pageLink(root_focus, focus_id, data, "a:") orelse return null; 2554 // a link to a different parent page always navigates; within a page, a 2555 // files-directory / commits-page / list-window change navigates while tab 2556 // links stay in-page. 2557 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; 2558 return null; 2559 } 2560 2561 // the route carried by an `ai:` focus target, or null for any other target 2562 pub fn inPageLink(root_focus: *Focus, focus_id: usize, data: Session.Data) ?RoutablePage { 2563 return pageLink(root_focus, focus_id, data, in_page_link_prefix); 2564 } 2565 2566 fn pageLink(root_focus: *Focus, focus_id: usize, data: Session.Data, prefix: []const u8) ?RoutablePage { 2567 const child = root_focus.children.get(focus_id) orelse return null; 2568 const custom = switch (child.focus.kind) { 2569 .custom => |c| c, 2570 else => return null, 2571 }; 2572 if (!std.mem.startsWith(u8, custom, prefix)) return null; 2573 const path = custom[prefix.len..]; 2574 // local sessions build (and parse) links with the repo identity elided 2575 return if (data.host_kind == .local) RoutablePage.fromUrlLocal(path) else RoutablePage.fromUrl(path); 2576 } 2577 2578 // a display author, resolved against the admin db at read time 2579 pub const Author = union(enum) { 2580 unknown, 2581 email: []const u8, // an email no user matches 2582 user_name: []const u8, 2583 2584 // the commit author line's email, resolved like initFromEmail 2585 pub fn init( 2586 haxy_moment: ?evt.AdminDB.HashMap(.read_only), 2587 arena: *std.heap.ArenaAllocator, 2588 author_line: []const u8, 2589 ) !Author { 2590 return initFromEmail(haxy_moment, arena, evt.authorEmail(author_line)); 2591 } 2592 2593 // from a record's stored author email: it resolves to the user currently 2594 // holding it, else stays the email. the result is allocated in `arena`, 2595 // so the email may borrow transient memory. 2596 pub fn initFromEmail( 2597 haxy_moment: ?evt.AdminDB.HashMap(.read_only), 2598 arena: *std.heap.ArenaAllocator, 2599 author_email: ?[]const u8, 2600 ) !Author { 2601 const email = author_email orelse return .unknown; 2602 if (haxy_moment) |moment| { 2603 if (try evt.User.readByEmail(evt.AdminDB, evt.admin_repo_opts.hash, moment, arena, email)) |user| { 2604 return .{ .user_name = user.event.name }; 2605 } 2606 } 2607 return .{ .email = try arena.allocator().dupe(u8, email) }; 2608 } 2609 }; 2610 2611 // the "a:" link to user `name`'s page. 2612 pub fn userLink(page_arena: *std.heap.ArenaAllocator, name: []const u8) ![]const u8 { 2613 const parsed = RoutablePage.Array(evt.User.name_max_len).from(name) orelse return error.RouteTooLong; 2614 const url = try (RoutablePage{ .user_repos = .{ .name = parsed } }).toUrl(page_arena); 2615 return std.fmt.allocPrint(page_arena.allocator(), "a:{s}", .{url}); 2616 } 2617 2618 // a focusable " author " box showing `author`, linking to their user page 2619 // when it is a known user 2620 pub fn authorBox(allocator: std.mem.Allocator, page_arena: *std.heap.ArenaAllocator, author: Author) !wgt.TextBox { 2621 const text = switch (author) { 2622 .unknown => "", 2623 .email, .user_name => |t| t, 2624 }; 2625 var tb = try wgt.TextBox.init(allocator, text, .{ .border_style = .single, .rounded_corners = true, .wrap_kind = .none, .label = " author " }); 2626 errdefer tb.deinit(allocator); 2627 tb.getFocus().mode = .all; 2628 switch (author) { 2629 .user_name => |name| tb.getFocus().kind = .{ .custom = try userLink(page_arena, name) }, 2630 else => {}, 2631 } 2632 return tb; 2633 } 2634 2635 // native-TUI navigation 2636 pub const Nav = struct { 2637 root: Widget, 2638 // backs the current page (its Page data and the page-scoped strings its 2639 // widgets build). owned here, swapped on each navigation. session.page_arena 2640 // tracks whichever of these is current so widgets allocate into it. 2641 arena: *std.heap.ArenaAllocator, 2642 history: std.ArrayList(Entry), 2643 2644 // each retained page keeps its own arena, freed when the page leaves the 2645 // stack (popped on back, evicted at cap, or on deinit). this is what keeps a 2646 // long-lived session from accumulating every page it ever visited. 2647 const Entry = struct { root: Widget, route: RoutablePage, arena: *std.heap.ArenaAllocator }; 2648 2649 // cap on retained back-history so the chain can't grow memory without bound 2650 const max_history: usize = 16; 2651 2652 pub fn init(allocator: std.mem.Allocator, session: *Session) !Nav { 2653 session.back = .unavailable; 2654 const arena = try allocator.create(std.heap.ArenaAllocator); 2655 arena.* = std.heap.ArenaAllocator.init(allocator); 2656 errdefer { 2657 arena.deinit(); 2658 allocator.destroy(arena); 2659 } 2660 2661 session.page_arena = arena; 2662 const route = session.data.current_page; 2663 2664 const page = try arena.allocator().create(Page); 2665 page.* = try Page.init(arena, session, route); 2666 return .{ 2667 .root = try initRoot(allocator, page, session), 2668 .arena = arena, 2669 .history = .empty, 2670 }; 2671 } 2672 2673 pub fn deinit(self: *Nav, allocator: std.mem.Allocator) void { 2674 self.root.deinit(allocator); 2675 freeArena(allocator, self.arena); 2676 for (self.history.items) |*entry| { 2677 entry.root.deinit(allocator); 2678 freeArena(allocator, entry.arena); 2679 } 2680 self.history.deinit(allocator); 2681 } 2682 2683 fn freeArena(allocator: std.mem.Allocator, arena: *std.heap.ArenaAllocator) void { 2684 arena.deinit(); 2685 allocator.destroy(arena); 2686 } 2687 2688 // reconcile the displayed root with the session's navigation state. a 2689 // forward nav (current_page moved to a different parent page) pushes the 2690 // current root and builds the new page in a fresh arena; a back request 2691 // frees the current page and restores the previous one. when escape is 2692 // pressed with no history left we switch to the quit tab instead of quitting. 2693 pub fn sync(self: *Nav, allocator: std.mem.Allocator, session: *Session) !void { 2694 // refresh: rebuild the current page in place from a current moment 2695 if (session.refresh_requested) { 2696 session.refresh_requested = false; 2697 if (session.haxy_moment != null or session.local != null) { 2698 const arena = try allocator.create(std.heap.ArenaAllocator); 2699 arena.* = std.heap.ArenaAllocator.init(allocator); 2700 errdefer freeArena(allocator, arena); 2701 2702 session.page_arena = arena; 2703 2704 const route = session.data.current_page; 2705 const page = try arena.allocator().create(Page); 2706 page.* = try Page.init(arena, session, route); 2707 const new_root = try initRoot(allocator, page, session); 2708 2709 self.root.deinit(allocator); 2710 freeArena(allocator, self.arena); 2711 self.root = new_root; 2712 self.arena = arena; 2713 } 2714 return; 2715 } 2716 2717 if (session.back == .requested) { 2718 if (self.history.pop()) |entry| { 2719 session.back = if (self.history.items.len == 0) .unavailable else .available; 2720 self.root.deinit(allocator); 2721 freeArena(allocator, self.arena); 2722 self.root = entry.root; 2723 self.arena = entry.arena; 2724 session.page_arena = entry.arena; 2725 session.data.current_page = entry.route; 2726 chooseAnsiArtForNavigation(session); 2727 return; 2728 } 2729 session.back = .unavailable; 2730 // nothing to go back to; switch to the quit confirmation 2731 const root_focus = self.root.getFocus(); 2732 var iter = root_focus.children.iterator(); 2733 while (iter.next()) |entry| { 2734 switch (entry.value_ptr.focus.kind) { 2735 .custom => |custom| if (std.mem.eql(u8, custom, Quit.tab_kind)) { 2736 root_focus.setFocus(entry.key_ptr.*); 2737 // a Stack only builds its selected child, so the quit 2738 // button isn't in the focus tree until a build runs with 2739 // the quit tab selected. build once, then send a 2740 // synthetic arrow_down to drop focus from the tab onto 2741 // the button so it's ready to confirm. 2742 try self.root.build(allocator, .{ 2743 .min_size = .{ .width = null, .height = 40 }, 2744 .max_size = .{ .width = 80, .height = null }, 2745 }, root_focus); 2746 try self.root.input(allocator, .arrow_down, root_focus); 2747 break; 2748 }, 2749 else => {}, 2750 } 2751 } 2752 return; 2753 } 2754 2755 // forward navigation: navigate() set next_page to the page to move to (a 2756 // cross-page link or tab change crossing pages) 2757 if (session.next_page) |route| { 2758 session.next_page = null; 2759 if (session.haxy_moment == null and session.local == null) return; 2760 const previous_route = session.data.current_page; 2761 // the page we navigated to becomes the current page 2762 session.data.current_page = route; 2763 session.back = .available; 2764 2765 const arena = try allocator.create(std.heap.ArenaAllocator); 2766 arena.* = std.heap.ArenaAllocator.init(allocator); 2767 errdefer freeArena(allocator, arena); 2768 2769 session.page_arena = arena; 2770 2771 const page = try arena.allocator().create(Page); 2772 page.* = try Page.init(arena, session, route); 2773 const new_root = try initRoot(allocator, page, session); 2774 2775 try self.history.append(allocator, .{ .root = self.root, .route = previous_route, .arena = self.arena }); 2776 // drop the oldest entry (freeing its widget tree and arena) once over cap 2777 if (self.history.items.len > max_history) { 2778 var oldest = self.history.orderedRemove(0); 2779 oldest.root.deinit(allocator); 2780 freeArena(allocator, oldest.arena); 2781 } 2782 self.root = new_root; 2783 self.arena = arena; 2784 } 2785 } 2786 }; 2787 2788 pub fn initRoot(allocator: std.mem.Allocator, page: *const Page, session: *Session) !Widget { 2789 const page_widget: Widget = switch (page.*) { 2790 .home => |*p| .{ .home = try .init(allocator, p, session) }, 2791 .user => |*p| .{ .user = try .init(allocator, p, session) }, 2792 .repo => |*p| .{ .repo = try .init(allocator, p, session) }, 2793 .fork => |*p| .{ .fork = try .init(allocator, p, session) }, 2794 }; 2795 2796 chooseAnsiArtForNavigation(session); 2797 2798 // on the TUI/SSH, the page sits above a one-row footer showing the url 2799 var root = if (session.is_terminal) blk: { 2800 var box = try wgt.Box(Widget).init(allocator, .{ .border_style = null, .direction = .vert }); 2801 errdefer box.deinit(allocator); 2802 const bg_id = bg_blk: { 2803 var background = try widget.AnsiBackground.init(allocator, page_widget, session); 2804 errdefer background.deinit(allocator); 2805 const id = background.getFocus().id; 2806 try box.children.put(allocator, id, .{ .widget = .{ .background = background }, .rect = null, .min_size = null }); 2807 break :bg_blk id; 2808 }; 2809 { 2810 var footer = try widget.Footer.init(allocator, session); 2811 errdefer footer.deinit(allocator); 2812 try box.children.put(allocator, footer.getFocus().id, .{ .widget = .{ .footer = footer }, .rect = null, .min_size = .{ .width = null, .height = 1 } }); 2813 } 2814 box.getFocus().child_id = bg_id; 2815 break :blk Widget{ .box = box }; 2816 } else Widget{ .background = try widget.AnsiBackground.init(allocator, page_widget, session) }; 2817 errdefer root.deinit(allocator); 2818 2819 // input-owning views build their TextInputs in init, so reset their 2820 // registrations here 2821 session.text_inputs.clearRetainingCapacity(); 2822 2823 try root.build(allocator, .{ 2824 .min_size = .{ .width = null, .height = 40 }, 2825 .max_size = .{ .width = 100, .height = null }, 2826 }, root.getFocus()); 2827 2828 return root; 2829 } 2830 2831 // native and server-side sessions choose from the embedded collection. WASM 2832 // keeps the art serialized by the server instead. 2833 fn chooseAnsiArtForNavigation(session: *Session) void { 2834 if (comptime ansi_arts.len == 0) return; 2835 const io = session.io orelse return; 2836 var random: usize = undefined; 2837 io.random(std.mem.asBytes(&random)); 2838 session.data.ansi_art = ansi_arts[random % ansi_arts.len]; 2839 } 2840