╭─────────────╮ │scroll to top│ ╰─────────────╯ ╭ ui.zig ───────────────────────────────────────────────────────╮ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ ╰───────────────────────────────────────────────────────────────╯
🬐 🬠 🬞🬂🬏 🬟 🬑 🬟 🬑 ╭594898ad..╮ 594898ad.. see-em: 🬋🬋🬋 🬋🬋🬋 🬋 🬋 │files │ commits refs discuss issues new login 🬐 🬠 🬐 🬠 🬑 🬟 🬰 ╰──────────╯ (459) user
╭────╮ ╭ clone ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ╮ │http│ ssh │ │ ╰────╯ ╰ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ╯
.. embed/ event/ test/ ui/ command.zig diff3.zig event.zig fork.zig lib.zig main.zig main_wasm.zig patch.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
1798 return @field(feedback, @tagName(tag)); 1799 } 1800 1801 pub fn clearFormFeedback(self: *Self) void { 1802 self.data.form_feedback = null; 1803 } 1804 1805 // the commit author for an event this session creates, or null when it may 1806 // not create one 1807 pub fn eventAuthor(self: *Self) !?evt.CommitAuthor { 1808 if (self.data.is_local) { 1809 const src = self.local orelse return local_author_fallback; 1810 const io = self.io orelse return local_author_fallback; 1811 return try localAuthor(src, io, self.page_arena.child_allocator, self.page_arena); 1812 } 1813 const user_id = self.data.user_id orelse return null; 1814 const moment = self.haxy_moment orelse return null; 1815 const user = (try evt.User.readById(evt.AdminDB, evt.admin_repo_opts.hash, moment, self.page_arena, user_id)) orelse return null; 1816 return .{ .name = user.event.name, .email = user.event.email }; 1817 } 1818 1819 // queue an action for the host to drain this frame. 1820 pub fn push(self: *Self, action: Action) !void { 1821 try self.pending.append(self.arena.allocator(), action); 1822 } 1823 1824 // apply a single action's in-memory effect only (no persistence). 1825 fn apply(self: *Self, action: Action) void { 1826 switch (action) { 1827 .toggle_ansi => self.data.enable_ansi = !self.data.enable_ansi, 1828 } 1829 } 1830 1831 // drain the session's queued actions by applying them to the session. 1832 // used on the wasm path, which has no repo to persist to. 1833 pub fn applyPending(self: *Self) void { 1834 for (self.pending.items) |action| self.apply(action); 1835 self.pending.clearRetainingCapacity(); 1836 } 1837 1838 // drain the session's queued actions by applying them to the session and 1839 // writing them to the db 1840 pub fn applyAndWritePending( 1841 self: *Self, 1842 io: std.Io, 1843 allocator: std.mem.Allocator, 1844 repo: *rp.Repo(.xit, evt.admin_repo_opts), 1845 ) !void { 1846 defer self.pending.clearRetainingCapacity(); 1847 for (self.pending.items) |action| { 1848 self.apply(action); 1849 switch (action) { 1850 .toggle_ansi => if (self.data.user_id) |user_id| { 1851 try evt.User.toggleAnsi(evt.admin_repo_opts, io, allocator, repo, user_id); 1852 }, 1853 } 1854 } 1855 } 1856 1857 // reload the moment from the admin repo and re-read user preferences 1858 pub fn reloadMoment(self: *Self, allocator: std.mem.Allocator, repo: *rp.Repo(.xit, evt.admin_repo_opts)) !void { 1859 const moment = try evt.currentMoment(evt.admin_repo_opts, repo); 1860 self.haxy_moment = moment; 1861 1862 const user_id = self.data.user_id orelse return; 1863 var arena = std.heap.ArenaAllocator.init(allocator); 1864 defer arena.deinit(); 1865 if (try evt.User.readById(evt.AdminDB, evt.admin_repo_opts.hash, moment, &arena, user_id)) |user| { 1866 self.data.enable_ansi = user.event.enable_ansi; 1867 } 1868 } 1869 1870 // request a forward navigation to `route`; the host consumes next_page 1871 // (Nav.sync on the terminal, the wasm tick on the web). 1872 pub fn navigate(self: *Session, route: RoutablePage) !void { 1873 self.clearFormFeedback(); 1874 self.next_page = route; 1875 } 1876 }; 1877 1878 pub fn run(io: std.Io, allocator: std.mem.Allocator, session: *Session, repo_maybe: ?*rp.Repo(.xit, evt.admin_repo_opts)) !void { 1879 var nav = try Nav.init(allocator, session); 1880 defer nav.deinit(allocator); 1881 1882 var terminal = try term.Terminal.init(io, allocator); 1883 var terminal_live = true; 1884 defer if (terminal_live) terminal.deinit(io); 1885 1886 // set term as active so it will be properly cooked 1887 // when a panic/segfault happens 1888 term.setActive(&terminal); 1889 defer term.setActive(null); 1890 1891 while (!terminal.shouldQuit()) { 1892 const grid_changed = try terminal.render(&nav.root); 1893 1894 // process any inputs. 1895 // 1896 // if the grid didn't change, then first do a blocking 1897 // read, so the thread will sleep until further input. 1898 // after that, all remaining reads are non-blocking so 1899 // we can process the rest of the queued inputs. 1900 // 1901 // if the grid *did* change, then only do non-blocking 1902 // reads. we do not want to sleep the thread because 1903 // there may be an animation that requires more looping. 1904 var blocking = !grid_changed; 1905 while (try terminal.readKey(io, blocking)) |key| { 1906 blocking = false; 1907 try inputKey(allocator, &nav.root, key, session); 1908 } 1909 1910 if (session.host_request) |request| { 1911 session.host_request = null; 1912 switch (request) { 1913 .show_copyable_text => |copyable_text| { 1914 term.setActive(null); 1915 terminal.deinit(io); 1916 terminal_live = false; 1917 showCopyableText(io, copyable_text) catch |show_err| { 1918 terminal = try term.Terminal.init(io, allocator); 1919 terminal_live = true; 1920 term.setActive(&terminal); 1921 return show_err; 1922 }; 1923 terminal = try term.Terminal.init(io, allocator); 1924 terminal_live = true; 1925 term.setActive(&terminal); 1926 }, 1927 .sync_events => { 1928 try nav.root.build(allocator, .{ 1929 .min_size = .{ .width = null, .height = null }, 1930 .max_size = .{ .width = terminal.size.width, .height = terminal.size.height }, 1931 }, nav.root.getFocus()); 1932 _ = try terminal.render(&nav.root); 1933 try Repo.Events.performSync(allocator, session); 1934 }, 1935 } 1936 } 1937 1938 // persist queued actions when there's a repo; local mode has none, 1939 // so just apply in-memory 1940 if (repo_maybe) |repo| { 1941 try session.applyAndWritePending(io, allocator, repo); 1942 // reload so the next navigation builds its page from the current moment 1943 try session.reloadMoment(allocator, repo); 1944 } else { 1945 session.applyPending(); 1946 } 1947 1948 // reconcile navigation: forward to a new page, or back on escape. 1949 try nav.sync(allocator, session); 1950 1951 // the quit button (on the quit tab) asks the host to tear down. 1952 if (session.quit_requested) terminal.requestQuit(); 1953 1954 try nav.root.build(allocator, .{ 1955 .min_size = .{ .width = null, .height = null }, 1956 .max_size = .{ .width = terminal.size.width, .height = terminal.size.height }, 1957 }, nav.root.getFocus()); 1958 } 1959 } 1960 1961 fn showCopyableText(io: std.Io, copyable_text: []const u8) !void { 1962 const tty: ?std.Io.File = if (builtin.os.tag == .windows) 1963 null 1964 else 1965 try std.Io.Dir.cwd().openFile(io, "/dev/tty", .{ .mode = .read_write }); 1966 defer if (tty) |file| file.close(io); 1967 1968 const input = if (tty) |file| file else std.Io.File.stdin(); 1969 const output = if (tty) |file| file else std.Io.File.stdout(); 1970 1971 var write_buf: [1024]u8 = undefined; 1972 var writer = output.writer(io, &write_buf); 1973 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}); 1974 try writer.interface.flush(); 1975 1976 var read_buf: [1]u8 = undefined; 1977 var reader = input.reader(io, &read_buf); 1978 while (true) { 1979 const byte = try reader.interface.takeByte(); 1980 if (byte == '\r' or byte == '\n') return; 1981 } 1982 } 1983 1984 pub fn inputKey(allocator: std.mem.Allocator, root: *Widget, key: Key, session: *Session) !void { 1985 const root_focus = root.getFocus(); 1986 const focused_before = root_focus.grandchild_id; 1987 var activate_in_page_link = false; 1988 switch (key) { 1989 // request a navigation pop; the host's Nav.sync goes back a page, or 1990 // quits when there's no history left. 1991 .escape => { 1992 session.back = .requested; 1993 return; 1994 }, 1995 .ctrl => |letter| switch (letter) { 1996 'r' => { 1997 session.refresh_requested = true; 1998 return; 1999 }, 2000 else => try root.input(allocator, key, root_focus), 2001 }, 2002 .enter => { 2003 if (root_focus.grandchild_id) |gid| { 2004 // follow a cross-page link 2005 if (crossPageLink(root_focus, gid, session.data)) |route| { 2006 return session.navigate(route); 2007 } 2008 if (rawLink(root_focus, gid)) |url| return requestRawLink(session, url); 2009 } 2010 activate_in_page_link = true; 2011 try root.input(allocator, key, root_focus); 2012 }, 2013 .mouse => |mouse| { 2014 if (mouse.action == .press and mouse.action.press == .left) { 2015 if (root_focus.hitTest(mouse.x, mouse.y)) |hit| { 2016 const focus_id = hit.id; 2017 if (hit.kind == .background) { 2018 root_focus.setFocus(focus_id); 2019 return; 2020 } 2021 if (widget.isBackButton((root_focus.children.get(focus_id) orelse return).focus)) { 2022 if (session.back == .available) session.back = .requested; 2023 return; 2024 } 2025 // follow a cross-page link 2026 if (crossPageLink(root_focus, focus_id, session.data)) |route| { 2027 return session.navigate(route); 2028 } 2029 if (rawLink(root_focus, focus_id)) |url| { 2030 if (!mouse.ctrl) try requestRawLink(session, url); 2031 return; 2032 } 2033 root_focus.setFocus(focus_id); 2034 activate_in_page_link = true; 2035 } 2036 // forward the press into the widget tree so buttons (and any 2037 // future click-aware widgets) can react. widgets that don't 2038 // care about presses ignore it. 2039 try root.input(allocator, key, root_focus); 2040 } else { 2041 try root.input(allocator, key, root_focus); 2042 } 2043 }, 2044 else => try root.input(allocator, key, root_focus), 2045 } 2046 2047 const focused_after = root_focus.grandchild_id; 2048 if (!activate_in_page_link and focused_before == focused_after) return; 2049 const focus_id = focused_after orelse return; 2050 if (inPageLink(root_focus, focus_id, session.data)) |route| session.data.current_page = route; 2051 } 2052 2053 // a link to bytes the server serves directly rather than to a page route, so 2054 // it never resolves to a RoutablePage 2055 pub const raw_link_prefix = "ax:"; 2056 2057 // a route already loaded into the current page; focusing it changes the url 2058 // without rebuilding the page 2059 pub const in_page_link_prefix = "ai:"; 2060 2061 // an in-page tab's base route, or the exact current route when it is selected 2062 pub fn inPageTabLink(session: *Session, route: RoutablePage, selected: bool) ![]const u8 { 2063 const target = if (selected) session.data.current_page else route; 2064 return std.fmt.allocPrint(session.page_arena.allocator(), "{s}{s}", .{ in_page_link_prefix, try target.toUrl(session.page_arena) }); 2065 } 2066 2067 // a button the web renderer covers with a file picker that posts the chosen 2068 // file to the url after the prefix 2069 pub const file_input_prefix = "file:"; 2070 2071 // a submit button that overrides its enclosing form's action 2072 pub const submit_action_prefix = "submit:"; 2073 2074 // the url an `ax:` link points at, or null for anything else. a host that 2075 // suppresses the anchor's own navigation needs this to follow the link. 2076 pub fn rawLink(root_focus: *Focus, focus_id: usize) ?[]const u8 { 2077 const child = root_focus.children.get(focus_id) orelse return null; 2078 const custom = switch (child.focus.kind) { 2079 .custom => |c| c, 2080 else => return null, 2081 }; 2082 if (!std.mem.startsWith(u8, custom, raw_link_prefix)) return null; 2083 return custom[raw_link_prefix.len..]; 2084 } 2085 2086 fn requestRawLink(session: *Session, url: []const u8) !void { 2087 session.host_request = .{ .show_copyable_text = try terminalWebUrl(session.page_arena.allocator(), session, url) }; 2088 } 2089 2090 pub fn terminalWebUrl(allocator: std.mem.Allocator, session: *const Session, path: []const u8) ![]const u8 { 2091 return if (session.web_port) |port| 2092 try std.fmt.allocPrint(allocator, "http://localhost:{d}{s}", .{ port, path }) 2093 else 2094 path; 2095 } 2096 2097 // if the focus target at focus_id is an `a:` link that should navigate (a 2098 // different parent page, or a different files directory within the repo page), 2099 // return its route; otherwise null. lets a host turn a click / enter on such a 2100 // link into a navigation rather than a focus change. 2101 pub fn crossPageLink(root_focus: *Focus, focus_id: usize, data: Session.Data) ?RoutablePage { 2102 const current = data.current_page; 2103 const route = pageLink(root_focus, focus_id, data, "a:") orelse return null; 2104 // a link to a different parent page always navigates; within a page, a 2105 // files-directory / commits-page / list-window change navigates while tab 2106 // links stay in-page. 2107 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; 2108 return null; 2109 } 2110 2111 // the route carried by an `ai:` focus target, or null for any other target 2112 pub fn inPageLink(root_focus: *Focus, focus_id: usize, data: Session.Data) ?RoutablePage { 2113 return pageLink(root_focus, focus_id, data, in_page_link_prefix); 2114 } 2115 2116 fn pageLink(root_focus: *Focus, focus_id: usize, data: Session.Data, prefix: []const u8) ?RoutablePage { 2117 const child = root_focus.children.get(focus_id) orelse return null; 2118 const custom = switch (child.focus.kind) { 2119 .custom => |c| c, 2120 else => return null, 2121 }; 2122 if (!std.mem.startsWith(u8, custom, prefix)) return null; 2123 const path = custom[prefix.len..]; 2124 // local sessions build (and parse) links with the repo identity elided 2125 return if (data.is_local) RoutablePage.fromUrlLocal(path) else RoutablePage.fromUrl(path); 2126 } 2127 2128 // a display author, resolved against the admin db at read time 2129 pub const Author = union(enum) { 2130 unknown, 2131 email: []const u8, // an email no user matches 2132 user_name: []const u8, 2133 2134 // the commit author line's email, resolved like initFromEmail 2135 pub fn init( 2136 haxy_moment: ?evt.AdminDB.HashMap(.read_only), 2137 arena: *std.heap.ArenaAllocator, 2138 author_line: []const u8, 2139 ) !Author { 2140 return initFromEmail(haxy_moment, arena, evt.authorEmail(author_line)); 2141 } 2142 2143 // from a record's stored author email: it resolves to the user currently 2144 // holding it, else stays the email. the result is allocated in `arena`, 2145 // so the email may borrow transient memory. 2146 pub fn initFromEmail( 2147 haxy_moment: ?evt.AdminDB.HashMap(.read_only), 2148 arena: *std.heap.ArenaAllocator, 2149 author_email: ?[]const u8, 2150 ) !Author { 2151 const email = author_email orelse return .unknown; 2152 if (haxy_moment) |moment| { 2153 if (try evt.User.readByEmail(evt.AdminDB, evt.admin_repo_opts.hash, moment, arena, email)) |user| { 2154 return .{ .user_name = user.event.name }; 2155 } 2156 } 2157 return .{ .email = try arena.allocator().dupe(u8, email) }; 2158 } 2159 }; 2160 2161 // the "a:" link to user `name`'s page. 2162 pub fn userLink(page_arena: *std.heap.ArenaAllocator, name: []const u8) ![]const u8 { 2163 const parsed = RoutablePage.Array(evt.User.name_max_len).from(name) orelse return error.RouteTooLong; 2164 const url = try (RoutablePage{ .user_repos = .{ .name = parsed } }).toUrl(page_arena); 2165 return std.fmt.allocPrint(page_arena.allocator(), "a:{s}", .{url}); 2166 } 2167 2168 // a focusable " author " box showing `author`, linking to their user page 2169 // when it is a known user 2170 pub fn authorBox(allocator: std.mem.Allocator, page_arena: *std.heap.ArenaAllocator, author: Author) !wgt.TextBox { 2171 const text = switch (author) { 2172 .unknown => "", 2173 .email, .user_name => |t| t, 2174 }; 2175 var tb = try wgt.TextBox.init(allocator, text, .{ .border_style = .single, .rounded_corners = true, .wrap_kind = .none, .label = " author " }); 2176 errdefer tb.deinit(allocator); 2177 tb.getFocus().mode = .all; 2178 switch (author) { 2179 .user_name => |name| tb.getFocus().kind = .{ .custom = try userLink(page_arena, name) }, 2180 else => {}, 2181 } 2182 return tb; 2183 } 2184 2185 // native-TUI navigation 2186 pub const Nav = struct { 2187 root: Widget, 2188 // backs the current page (its Page data and the page-scoped strings its 2189 // widgets build). owned here, swapped on each navigation. session.page_arena 2190 // tracks whichever of these is current so widgets allocate into it. 2191 arena: *std.heap.ArenaAllocator, 2192 history: std.ArrayList(Entry), 2193 2194 // each retained page keeps its own arena, freed when the page leaves the 2195 // stack (popped on back, evicted at cap, or on deinit). this is what keeps a 2196 // long-lived session from accumulating every page it ever visited. 2197 const Entry = struct { root: Widget, route: RoutablePage, arena: *std.heap.ArenaAllocator }; 2198 2199 // cap on retained back-history so the chain can't grow memory without bound 2200 const max_history: usize = 16; 2201 2202 pub fn init(allocator: std.mem.Allocator, session: *Session) !Nav { 2203 session.back = .unavailable; 2204 const arena = try allocator.create(std.heap.ArenaAllocator); 2205 arena.* = std.heap.ArenaAllocator.init(allocator); 2206 errdefer { 2207 arena.deinit(); 2208 allocator.destroy(arena); 2209 } 2210 2211 session.page_arena = arena; 2212 const route = session.data.current_page; 2213 2214 const page = try arena.allocator().create(Page); 2215 page.* = try Page.init(arena, session, route); 2216 return .{ 2217 .root = try initRoot(allocator, page, session), 2218 .arena = arena, 2219 .history = .empty, 2220 }; 2221 } 2222 2223 pub fn deinit(self: *Nav, allocator: std.mem.Allocator) void { 2224 self.root.deinit(allocator); 2225 freeArena(allocator, self.arena); 2226 for (self.history.items) |*entry| { 2227 entry.root.deinit(allocator); 2228 freeArena(allocator, entry.arena); 2229 } 2230 self.history.deinit(allocator); 2231 } 2232 2233 fn freeArena(allocator: std.mem.Allocator, arena: *std.heap.ArenaAllocator) void { 2234 arena.deinit(); 2235 allocator.destroy(arena); 2236 } 2237 2238 // reconcile the displayed root with the session's navigation state. a 2239 // forward nav (current_page moved to a different parent page) pushes the 2240 // current root and builds the new page in a fresh arena; a back request 2241 // frees the current page and restores the previous one. when escape is 2242 // pressed with no history left we switch to the quit tab instead of quitting. 2243 pub fn sync(self: *Nav, allocator: std.mem.Allocator, session: *Session) !void { 2244 // refresh: rebuild the current page in place from a current moment 2245 if (session.refresh_requested) { 2246 session.refresh_requested = false; 2247 if (session.haxy_moment != null or session.local != null) { 2248 const arena = try allocator.create(std.heap.ArenaAllocator); 2249 arena.* = std.heap.ArenaAllocator.init(allocator); 2250 errdefer freeArena(allocator, arena); 2251 2252 session.page_arena = arena; 2253 2254 const route = session.data.current_page; 2255 const page = try arena.allocator().create(Page); 2256 page.* = try Page.init(arena, session, route); 2257 const new_root = try initRoot(allocator, page, session); 2258 2259 self.root.deinit(allocator); 2260 freeArena(allocator, self.arena); 2261 self.root = new_root; 2262 self.arena = arena; 2263 } 2264 return; 2265 } 2266 2267 if (session.back == .requested) { 2268 if (self.history.pop()) |entry| { 2269 session.back = if (self.history.items.len == 0) .unavailable else .available; 2270 self.root.deinit(allocator); 2271 freeArena(allocator, self.arena); 2272 self.root = entry.root; 2273 self.arena = entry.arena; 2274 session.page_arena = entry.arena; 2275 session.data.current_page = entry.route; 2276 chooseAnsiArtForNavigation(session); 2277 return; 2278 } 2279 session.back = .unavailable; 2280 // nothing to go back to; switch to the quit confirmation 2281 const root_focus = self.root.getFocus(); 2282 var iter = root_focus.children.iterator(); 2283 while (iter.next()) |entry| { 2284 switch (entry.value_ptr.focus.kind) { 2285 .custom => |custom| if (std.mem.eql(u8, custom, Quit.tab_kind)) { 2286 root_focus.setFocus(entry.key_ptr.*); 2287 // a Stack only builds its selected child, so the quit 2288 // button isn't in the focus tree until a build runs with 2289 // the quit tab selected. build once, then send a 2290 // synthetic arrow_down to drop focus from the tab onto 2291 // the button so it's ready to confirm. 2292 try self.root.build(allocator, .{ 2293 .min_size = .{ .width = null, .height = 40 }, 2294 .max_size = .{ .width = 80, .height = null }, 2295 }, root_focus); 2296 try self.root.input(allocator, .arrow_down, root_focus); 2297 break; 2298 }, 2299 else => {}, 2300 } 2301 } 2302 return; 2303 } 2304 2305 // forward navigation: navigate() set next_page to the page to move to (a 2306 // cross-page link or tab change crossing pages) 2307 if (session.next_page) |route| { 2308 session.next_page = null; 2309 if (session.haxy_moment == null and session.local == null) return; 2310 const previous_route = session.data.current_page; 2311 // the page we navigated to becomes the current page 2312 session.data.current_page = route; 2313 session.back = .available; 2314 2315 const arena = try allocator.create(std.heap.ArenaAllocator); 2316 arena.* = std.heap.ArenaAllocator.init(allocator); 2317 errdefer freeArena(allocator, arena); 2318 2319 session.page_arena = arena; 2320 2321 const page = try arena.allocator().create(Page); 2322 page.* = try Page.init(arena, session, route); 2323 const new_root = try initRoot(allocator, page, session); 2324 2325 try self.history.append(allocator, .{ .root = self.root, .route = previous_route, .arena = self.arena }); 2326 // drop the oldest entry (freeing its widget tree and arena) once over cap 2327 if (self.history.items.len > max_history) { 2328 var oldest = self.history.orderedRemove(0); 2329 oldest.root.deinit(allocator); 2330 freeArena(allocator, oldest.arena); 2331 } 2332 self.root = new_root; 2333 self.arena = arena; 2334 } 2335 } 2336 }; 2337 2338 pub fn initRoot(allocator: std.mem.Allocator, page: *const Page, session: *Session) !Widget { 2339 const page_widget: Widget = switch (page.*) { 2340 .home => |*p| .{ .home = try .init(allocator, p, session) }, 2341 .user => |*p| .{ .user = try .init(allocator, p, session) }, 2342 .repo => |*p| .{ .repo = try .init(allocator, p, session) }, 2343 .fork => |*p| .{ .fork = try .init(allocator, p, session) }, 2344 }; 2345 2346 chooseAnsiArtForNavigation(session); 2347 2348 // on the TUI/SSH, the page sits above a one-row footer showing the url 2349 var root = if (session.is_terminal) blk: { 2350 var box = try wgt.Box(Widget).init(allocator, .{ .border_style = null, .direction = .vert }); 2351 errdefer box.deinit(allocator); 2352 const bg_id = bg_blk: { 2353 var background = try widget.AnsiBackground.init(allocator, page_widget, session); 2354 errdefer background.deinit(allocator); 2355 const id = background.getFocus().id; 2356 try box.children.put(allocator, id, .{ .widget = .{ .background = background }, .rect = null, .min_size = null }); 2357 break :bg_blk id; 2358 }; 2359 { 2360 var footer = try widget.Footer.init(allocator, session); 2361 errdefer footer.deinit(allocator); 2362 try box.children.put(allocator, footer.getFocus().id, .{ .widget = .{ .footer = footer }, .rect = null, .min_size = .{ .width = null, .height = 1 } }); 2363 } 2364 box.getFocus().child_id = bg_id; 2365 break :blk Widget{ .box = box }; 2366 } else Widget{ .background = try widget.AnsiBackground.init(allocator, page_widget, session) }; 2367 errdefer root.deinit(allocator); 2368 2369 // input-owning views build their TextInputs in init, so reset their 2370 // registrations here 2371 session.text_inputs.clearRetainingCapacity(); 2372 2373 try root.build(allocator, .{ 2374 .min_size = .{ .width = null, .height = 40 }, 2375 .max_size = .{ .width = 100, .height = null }, 2376 }, root.getFocus()); 2377 2378 return root; 2379 } 2380 2381 // native and server-side sessions choose from the embedded collection. WASM 2382 // keeps the art serialized by the server instead. 2383 fn chooseAnsiArtForNavigation(session: *Session) void { 2384 if (comptime ansi_arts.len == 0) return; 2385 const io = session.io orelse return; 2386 var random: usize = undefined; 2387 io.random(std.mem.asBytes(&random)); 2388 session.data.ansi_art = ansi_arts[random % ansi_arts.len]; 2389 } 2390