╭─────────────╮ │scroll to top│ ╰─────────────╯ ╭ ui.zig ───────────────────────────────────────────────────────╮ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ ╰───────────────────────────────────────────────────────────────╯
🬐 🬠 🬞🬂🬏 🬟 🬑 🬟 🬑 ╭73ff1bca..╮ 73ff1bca.. see-em: 🬋🬋🬋 🬋🬋🬋 🬋 🬋 │files │ commits refs discuss issues new login 🬐 🬠 🬐 🬠 🬑 🬟 🬰 ╰──────────╯ (614) 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
1986 } 1987 }; 1988 1989 // where a repo page reads its on-disk repo from 1990 pub const RepoSource = struct { 1991 path: []const u8, 1992 repo_kind: rp.RepoKind, 1993 // the user's global git config, so local mode picks up their identity and 1994 // their signing and ssh settings. null on the server paths, which must not 1995 // read whoever runs the server. 1996 global_config_path: ?[]const u8 = null, 1997 1998 pub fn localInitOpts(self: RepoSource) rp.InitOpts { 1999 return .{ .path = self.path, .global_config_path = self.global_config_path }; 2000 } 2001 2002 pub fn hasBranch(self: RepoSource, io: std.Io, allocator: std.mem.Allocator, branch: []const u8) !bool { 2003 if (!xit.ref.validateName(branch)) return false; 2004 return switch (self.repo_kind) { 2005 inline else => |repo_kind| blk: { 2006 var any_repo = try rp.AnyRepo(repo_kind, .{}).open(io, allocator, self.localInitOpts()); 2007 defer any_repo.deinit(io, allocator); 2008 break :blk switch (any_repo) { 2009 inline else => |*repo| (try repo.readRef(io, .{ .kind = .head, .name = branch })) != null, 2010 }; 2011 }, 2012 }; 2013 } 2014 2015 // whether the actor may change the event `id` names 2016 pub fn canModify( 2017 self: RepoSource, 2018 io: std.Io, 2019 allocator: std.mem.Allocator, 2020 actor: Actor, 2021 kind: evt.EventKind, 2022 id: *const [evt.event_id_size]u8, 2023 ) !bool { 2024 // a role that may change an event with no author needs no read 2025 if (actor.role.canModify(actor.author.email, null)) return true; 2026 2027 var arena = std.heap.ArenaAllocator.init(allocator); 2028 defer arena.deinit(); 2029 return switch (self.repo_kind) { 2030 inline else => |repo_kind| blk: { 2031 var any_repo = try rp.AnyRepo(repo_kind, .{}).open(io, allocator, self.localInitOpts()); 2032 defer any_repo.deinit(io, allocator); 2033 break :blk switch (any_repo) { 2034 inline else => |*repo| actor.role.canModify(actor.author.email, try evt.readAuthorEmail(repo_kind, repo.self_repo_opts, io, allocator, &arena, repo, kind, id)), 2035 }; 2036 }, 2037 }; 2038 } 2039 }; 2040 2041 // who a write acts as and the role they hold in its repo 2042 pub const Actor = struct { 2043 author: evt.CommitAuthor, 2044 // local mode has no accounts, so it has no user id 2045 user_id: ?[evt.event_id_size]u8 = null, 2046 role: evt.Repo.Role, 2047 // the repo owner's id, which local mode lacks 2048 repo_user_id: ?[evt.event_id_size]u8 = null, 2049 }; 2050 2051 pub const Authorization = union(enum) { 2052 actor: Actor, 2053 login_required, 2054 repo_not_found, 2055 forbidden, 2056 }; 2057 2058 // the account `user_id` names, or null once it has been removed. a user id is 2059 // checked here wherever one enters, so the role lookups can trust theirs. 2060 pub fn activeUser( 2061 moment: evt.AdminDB.HashMap(.read_only), 2062 arena: *std.heap.ArenaAllocator, 2063 user_id: [evt.event_id_size]u8, 2064 ) !?evt.User.Record { 2065 const user = (try evt.User.readById(evt.AdminDB, evt.admin_repo_opts.hash, moment, arena, &user_id)) orelse return null; 2066 return if (user.removed) null else user; 2067 } 2068 2069 // whether the user may write to the repo `identity` names with at least 2070 // `min_role` 2071 pub fn authorizeUser( 2072 io: std.Io, 2073 moment: evt.AdminDB.HashMap(.read_only), 2074 arena: *std.heap.ArenaAllocator, 2075 users_dir: []const u8, 2076 user_id: [evt.event_id_size]u8, 2077 identity: []const u8, 2078 min_role: evt.Repo.Role, 2079 ) !Authorization { 2080 const user = (try activeUser(moment, arena, user_id)) orelse return .login_required; 2081 2082 const owner_repo = evt.parseOwnerRepoPath(identity) orelse return .repo_not_found; 2083 const repo = (try evt.readRepoByOwnerAndName(io, arena.child_allocator, arena, moment, users_dir, owner_repo.owner, owner_repo.name)) orelse return .repo_not_found; 2084 const role = evt.Repo.roleOf(repo.repo, user_id); 2085 // a repo the user can't read doesn't exist to them 2086 if (role == .none) return .repo_not_found; 2087 if (!role.atLeast(min_role)) return .forbidden; 2088 return .{ .actor = .{ 2089 .author = .{ .name = user.event.name, .email = user.event.email }, 2090 .user_id = user_id, 2091 .role = role, 2092 .repo_user_id = repo.repo.event.user_id[0..evt.event_id_size].*, 2093 } }; 2094 } 2095 2096 // events created in local mode have no account behind them, so the commit 2097 // author comes from the repo's config, which the global config feeds into. 2098 pub const local_author_fallback = evt.CommitAuthor{ .name = "haxy", .email = "user@haxy" }; 2099 2100 pub fn localAuthor( 2101 src: RepoSource, 2102 io: std.Io, 2103 allocator: std.mem.Allocator, 2104 arena: *std.heap.ArenaAllocator, 2105 ) !evt.CommitAuthor { 2106 switch (src.repo_kind) { 2107 inline else => |repo_kind| { 2108 var any_repo = rp.AnyRepo(repo_kind, .{}).open(io, allocator, src.localInitOpts()) catch return local_author_fallback; 2109 defer any_repo.deinit(io, allocator); 2110 2111 switch (any_repo) { 2112 inline else => |*repo| { 2113 var config = try repo.listConfig(io, allocator); 2114 defer config.deinit(); 2115 2116 const user = config.sections.get("user") orelse return local_author_fallback; 2117 const name = user.get("name") orelse return local_author_fallback; 2118 const email = user.get("email") orelse return local_author_fallback; 2119 return .{ 2120 .name = try arena.allocator().dupe(u8, name), 2121 .email = try arena.allocator().dupe(u8, email), 2122 }; 2123 }, 2124 } 2125 }, 2126 } 2127 } 2128 2129 // per-connection mutable state. each SSH session / web session / local TUI 2130 // run gets its own. 2131 pub const Session = struct { 2132 data: Data = .{}, 2133 // session-lifetime allocations: login/user_id, persisted prefs, queued 2134 // actions. lives as long as the connection. 2135 arena: *std.heap.ArenaAllocator, 2136 // current page's allocations: page data and the page-scoped strings widgets 2137 // build (form actions, links). owned by Nav, swapped on each navigation, so 2138 // it doesn't accumulate over a long-lived session. on the web/wasm paths, 2139 // where a render is one-shot, this points at the same arena as `arena`. 2140 page_arena: *std.heap.ArenaAllocator, 2141 haxy_moment: ?evt.AdminDB.HashMap(.read_only) = null, // db cursor (null on the wasm side) 2142 // filesystem io and the path to <server>/repos, for opening on-disk repos 2143 // during page construction. both null on wasm, which has no filesystem and 2144 // rebuilds pages from the serialized snapshot rather than from disk. 2145 io: ?std.Io = null, 2146 admin_repo: ?*rp.Repo(.xit, evt.admin_repo_opts) = null, 2147 users_dir: ?[]const u8 = null, 2148 // the single on-disk repo this session views, when running in local mode 2149 // (haxy invoked with no arguments inside a repo). null on the server paths, 2150 // which resolve repos from the admin db instead. 2151 local: ?RepoSource = null, 2152 pending: std.ArrayList(Action) = .empty, // actions queued by widgets this frame 2153 // focus id -> the live TextInput, refreshed each frame by the views that own 2154 // inputs. web/wasm form handling looks widgets up here by focus id. 2155 text_inputs: std.AutoHashMapUnmanaged(usize, *wgt.TextInput) = .empty, 2156 back: enum { unavailable, available, requested } = .unavailable, 2157 refresh_requested: bool = false, // set by input (ctrl+r) 2158 // a requested forward navigation. set this (via navigate) to move to a new 2159 // page; Nav.sync builds it and then copies it into current_page, clearing 2160 // this back to null. setting current_page directly only updates the url and 2161 // does not navigate. 2162 next_page: ?RoutablePage = null, 2163 is_terminal: bool = false, // true on remote SSH and local TUI 2164 // port the web UI is served on, for the TUI/SSH footer's "http://localhost:<port>..." 2165 // url. null on the web itself (no footer there). 2166 web_port: ?u16 = null, 2167 // a host operation requested by a widget 2168 host_request: ?HostRequest = null, 2169 quit_requested: bool = false, 2170 2171 pub const HostRequest = union(enum) { 2172 show_copyable_text: []const u8, 2173 sync_events, 2174 undo: RoutablePage.RepoUndoRoute, 2175 }; 2176 2177 pub const FormFeedback = union(enum) { 2178 pub const LoginFailure = enum { unknown_user, wrong_password }; 2179 pub const ThreadFailure = enum { required_title }; 2180 pub const PatchFailure = enum { 2181 required_title, 2182 invalid_target_branch, 2183 invalid_source_branch, 2184 same_branch, 2185 unrelated_branches, 2186 2187 pub fn fromError(err: anyerror) ?PatchFailure { 2188 return switch (err) { 2189 error.InvalidTargetBranch => .invalid_target_branch, 2190 error.InvalidSourceBranch => .invalid_source_branch, 2191 error.SameBranch => .same_branch, 2192 error.UnrelatedBranches => .unrelated_branches, 2193 else => null, 2194 }; 2195 } 2196 }; 2197 2198 pub const RepoFailure = enum { 2199 required_name, 2200 invalid_name, 2201 name_taken, 2202 2203 pub fn fromError(err: anyerror) ?RepoFailure { 2204 return switch (err) { 2205 error.NameEmpty => .required_name, 2206 error.NameTooLong, error.InvalidName => .invalid_name, 2207 error.NameTaken => .name_taken, 2208 else => null, 2209 }; 2210 } 2211 }; 2212 2213 login: struct { 2214 failure: LoginFailure, 2215 username: []const u8, 2216 }, 2217 repo: struct { 2218 failure: RepoFailure, 2219 fields: struct { 2220 name: []const u8, 2221 description: []const u8, 2222 hash: hash.HashKind, 2223 access: evt.Repo.Access, 2224 }, 2225 }, 2226 issue: struct { 2227 failure: ThreadFailure, 2228 fields: ?struct { 2229 title: []const u8, 2230 labels: []const u8, 2231 description: []const u8, 2232 } = null, 2233 }, 2234 patch: struct { 2235 failure: PatchFailure, 2236 fields: ?struct { 2237 title: []const u8, 2238 labels: []const u8, 2239 description: []const u8, 2240 target_branch: []const u8, 2241 source_branch: []const u8 = "", 2242 source_kind: Repo.Patches.Source.Kind = .fork, 2243 } = null, 2244 }, 2245 discussion: struct { 2246 failure: ThreadFailure, 2247 fields: ?struct { 2248 title: []const u8, 2249 labels: []const u8, 2250 description: []const u8, 2251 } = null, 2252 }, 2253 }; 2254 2255 const Self = @This(); 2256 2257 // serializable data sent down to web client 2258 pub const Data = struct { 2259 user_id: ?[]const u8 = null, 2260 // the logged-in user's name, for the views that show it 2261 user_name: ?[]const u8 = null, 2262 // a failed form retained long enough to render it for correction 2263 form_feedback: ?FormFeedback = null, 2264 // a transient local event-sync error 2265 sync_failure: ?[]const u8 = null, 2266 // a failed terminal undo retained on the current tab 2267 undo_failure: ?[]const u8 = null, 2268 current_page: RoutablePage = .default, 2269 // whether to render the ANSI art backdrop 2270 enable_ansi: bool = true, 2271 // the selected ANSI art. the server serializes one image for WASM so 2272 // the browser does not need the whole build-generated collection. 2273 ansi_art: []const u8 = "", 2274 // the bound git-service ports. absent in local mode, where remote urls 2275 // are not shown. 2276 git_http_port: ?u16 = null, 2277 git_ssh_port: ?u16 = null, 2278 git_ssh_prefix: []const u8 = "", 2279 // whether this session views a local repo or the server. unlike `local` 2280 // (the host-side filesystem source) this travels in the snapshot, so 2281 // the wasm side also parses elided link urls and hides the multi-user 2282 // chrome. 2283 host_kind: evt.HostKind = .server, 2284 }; 2285 2286 // a user-initiated state change. widgets enqueue these on the session during 2287 // input instead of mutating state or touching the DB themselves; the host 2288 // drains them each frame (see applyAndWritePending / applyPending). this keeps DB 2289 // side effects out of the widget tree and gives every render path one place to 2290 // turn a UI action into a state change + event. 2291 pub const Action = union(enum) { 2292 toggle_ansi, 2293 }; 2294 2295 pub fn init( 2296 arena: *std.heap.ArenaAllocator, 2297 repo: *rp.Repo(.xit, evt.admin_repo_opts), 2298 data: Data, 2299 ) !Self { 2300 var session = Self{ 2301 .data = data, 2302 .arena = arena, 2303 // until a host swaps in a page-scoped arena (Nav does this), page 2304 // allocations land in the session arena. on the web path that's the 2305 // intended behavior, since the whole arena is per-request. 2306 .page_arena = arena, 2307 .admin_repo = repo, 2308 .haxy_moment = try evt.currentMoment(evt.admin_repo_opts, repo), 2309 }; 2310 try session.loadUser(); 2311 return session; 2312 } 2313 2314 // load the logged-in user's name and persisted preferences from the db 2315 pub fn loadUser(self: *Self) !void { 2316 const user_id = self.userId() orelse return; 2317 const moment = self.haxy_moment orelse return; 2318 const user = (try activeUser(moment, self.arena, user_id)) orelse return self.logOut(); 2319 self.data.user_name = user.event.name; 2320 self.data.enable_ansi = user.event.enable_ansi; 2321 } 2322 2323 // forget the logged-in user, on a logout or once their account is removed 2324 pub fn logOut(self: *Self) void { 2325 self.data.user_id = null; 2326 self.data.user_name = null; 2327 } 2328 2329 pub fn userId(self: *const Self) ?[evt.event_id_size]u8 { 2330 const bytes = self.data.user_id orelse return null; 2331 if (bytes.len != evt.event_id_size) return null; 2332 var id: [evt.event_id_size]u8 = undefined; 2333 @memcpy(&id, bytes); 2334 return id; 2335 } 2336 2337 pub fn formFeedback(self: *const Self, comptime tag: std.meta.Tag(FormFeedback)) ?@FieldType(FormFeedback, @tagName(tag)) { 2338 const feedback = self.data.form_feedback orelse return null; 2339 if (std.meta.activeTag(feedback) != tag) return null; 2340 return @field(feedback, @tagName(tag)); 2341 } 2342 2343 pub fn clearFormFeedback(self: *Self) void { 2344 self.data.form_feedback = null; 2345 } 2346 2347 // the actor for a write to the repo `identity` names, or null when the 2348 // session may not write there with at least `min_role`. local mode always 2349 // writes. 2350 pub fn authorize(self: *Self, identity: []const u8, min_role: evt.Repo.Role) !?Actor { 2351 if (self.data.host_kind == .local) { 2352 const author = blk: { 2353 const src = self.local orelse break :blk local_author_fallback; 2354 const io = self.io orelse break :blk local_author_fallback; 2355 break :blk try localAuthor(src, io, self.page_arena.child_allocator, self.page_arena); 2356 }; 2357 return .{ .author = author, .role = .owner }; 2358 } 2359 const user_id = self.userId() orelse return null; 2360 // the session's moment predates this input, so read the roles afresh 2361 const admin_repo = self.admin_repo orelse return null; 2362 const io = self.io orelse return null; 2363 const users_dir = self.users_dir orelse return null; 2364 const moment = try evt.currentMoment(evt.admin_repo_opts, admin_repo); 2365 return switch (try authorizeUser(io, moment, self.page_arena, users_dir, user_id, identity, min_role)) { 2366 .actor => |actor| actor, 2367 .login_required, .repo_not_found, .forbidden => null, 2368 }; 2369 } 2370 2371 // where this session's event writes go. a server session always has a users dir 2372 pub fn eventHost(self: *const Self) evt.Host { 2373 return switch (self.data.host_kind) { 2374 .local => .local, 2375 .server => .{ .server = .{ .users_dir = self.users_dir orelse unreachable } }, 2376 }; 2377 } 2378 2379 // queue an action for the host to drain this frame. 2380 pub fn push(self: *Self, action: Action) !void { 2381 try self.pending.append(self.arena.allocator(), action); 2382 } 2383 2384 // apply a single action's in-memory effect only (no persistence). 2385 fn apply(self: *Self, action: Action) void { 2386 switch (action) { 2387 .toggle_ansi => self.data.enable_ansi = !self.data.enable_ansi, 2388 } 2389 } 2390 2391 // drain the session's queued actions by applying them to the session. 2392 // used on the wasm path, which has no repo to persist to. 2393 pub fn applyPending(self: *Self) void { 2394 for (self.pending.items) |action| self.apply(action); 2395 self.pending.clearRetainingCapacity(); 2396 } 2397 2398 // drain the session's queued actions by applying them to the session and 2399 // writing them to the db 2400 pub fn applyAndWritePending( 2401 self: *Self, 2402 io: std.Io, 2403 allocator: std.mem.Allocator, 2404 repo: *rp.Repo(.xit, evt.admin_repo_opts), 2405 ) !void { 2406 defer self.pending.clearRetainingCapacity(); 2407 for (self.pending.items) |action| { 2408 self.apply(action); 2409 switch (action) { 2410 .toggle_ansi => if (self.data.user_id) |user_id| { 2411 try evt.User.toggleAnsi(evt.admin_repo_opts, io, allocator, repo, self.users_dir orelse unreachable, user_id); 2412 }, 2413 } 2414 } 2415 } 2416 2417 // reload the moment from the admin repo and re-read user preferences 2418 pub fn reloadMoment(self: *Self, allocator: std.mem.Allocator, repo: *rp.Repo(.xit, evt.admin_repo_opts)) !void { 2419 const moment = try evt.currentMoment(evt.admin_repo_opts, repo); 2420 self.haxy_moment = moment; 2421 2422 const user_id = self.userId() orelse return; 2423 var arena = std.heap.ArenaAllocator.init(allocator); 2424 defer arena.deinit(); 2425 const user = (try activeUser(moment, &arena, user_id)) orelse return self.logOut(); 2426 self.data.enable_ansi = user.event.enable_ansi; 2427 } 2428 2429 // request a forward navigation to `route`; the host consumes next_page 2430 // (Nav.sync on the terminal, the wasm tick on the web). 2431 pub fn navigate(self: *Session, route: RoutablePage) !void { 2432 self.clearFormFeedback(); 2433 self.next_page = route; 2434 } 2435 }; 2436 2437 pub fn run(io: std.Io, allocator: std.mem.Allocator, session: *Session, repo_maybe: ?*rp.Repo(.xit, evt.admin_repo_opts)) !void { 2438 var nav = try Nav.init(allocator, session); 2439 defer nav.deinit(allocator); 2440 2441 var terminal = try term.Terminal.init(io, allocator); 2442 var terminal_live = true; 2443 defer if (terminal_live) terminal.deinit(io); 2444 2445 // set term as active so it will be properly cooked 2446 // when a panic/segfault happens 2447 term.setActive(&terminal); 2448 defer term.setActive(null); 2449 2450 while (!terminal.shouldQuit()) { 2451 const grid_changed = try terminal.render(&nav.root); 2452 2453 // process any inputs. 2454 // 2455 // if the grid didn't change, then first do a blocking 2456 // read, so the thread will sleep until further input. 2457 // after that, all remaining reads are non-blocking so 2458 // we can process the rest of the queued inputs. 2459 // 2460 // if the grid *did* change, then only do non-blocking 2461 // reads. we do not want to sleep the thread because 2462 // there may be an animation that requires more looping. 2463 var blocking = !grid_changed; 2464 while (try terminal.readKey(io, blocking)) |key| { 2465 blocking = false; 2466 try inputKey(allocator, &nav.root, key, session); 2467 } 2468 2469 if (session.host_request) |request| { 2470 session.host_request = null; 2471 switch (request) { 2472 .show_copyable_text => |copyable_text| { 2473 term.setActive(null); 2474 terminal.deinit(io); 2475 terminal_live = false; 2476 showCopyableText(io, copyable_text) catch |show_err| { 2477 terminal = try term.Terminal.init(io, allocator); 2478 terminal_live = true; 2479 term.setActive(&terminal); 2480 return show_err; 2481 }; 2482 terminal = try term.Terminal.init(io, allocator); 2483 terminal_live = true; 2484 term.setActive(&terminal); 2485 }, 2486 .undo => |target| Repo.Undo.handleRequest(allocator, session, target), 2487 .sync_events => { 2488 try nav.root.build(allocator, .{ 2489 .min_size = .{ .width = null, .height = null }, 2490 .max_size = .{ .width = terminal.size.width, .height = terminal.size.height }, 2491 }, nav.root.getFocus()); 2492 _ = try terminal.render(&nav.root); 2493 try Repo.Events.performSync(allocator, session); 2494 }, 2495 } 2496 } 2497 2498 // persist queued actions when there's a repo; local mode has none, 2499 // so just apply in-memory 2500 if (repo_maybe) |repo| { 2501 try session.applyAndWritePending(io, allocator, repo); 2502 // reload so the next navigation builds its page from the current moment 2503 try session.reloadMoment(allocator, repo); 2504 } else { 2505 session.applyPending(); 2506 } 2507 2508 // reconcile navigation: forward to a new page, or back on escape. 2509 try nav.sync(allocator, session); 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.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 (root_focus.hitTest(mouse.x, mouse.y)) |hit| { 2576 const focus_id = hit.id; 2577 if (hit.kind == .background) { 2578 root_focus.setFocus(focus_id); 2579 return; 2580 } 2581 if (widget.isBackButton((root_focus.children.get(focus_id) orelse return).focus)) { 2582 if (session.back == .available) session.back = .requested; 2583 return; 2584 } 2585 // follow a cross-page link 2586 if (crossPageLink(root_focus, focus_id, session.data)) |route| { 2587 return session.navigate(route); 2588 } 2589 if (rawLink(root_focus, focus_id)) |url| { 2590 if (!mouse.ctrl) try requestRawLink(session, url); 2591 return; 2592 } 2593 root_focus.setFocus(focus_id); 2594 activate_in_page_link = true; 2595 } 2596 // forward the press into the widget tree so buttons (and any 2597 // future click-aware widgets) can react. widgets that don't 2598 // care about presses ignore it. 2599 try root.input(allocator, key, root_focus); 2600 } else { 2601 try root.input(allocator, key, root_focus); 2602 } 2603 }, 2604 else => try root.input(allocator, key, root_focus), 2605 } 2606 2607 const focused_after = root_focus.grandchild_id; 2608 if (!activate_in_page_link and focused_before == focused_after) return; 2609 const focus_id = focused_after orelse return; 2610 if (inPageLink(root_focus, focus_id, session.data)) |route| session.data.current_page = route; 2611 } 2612 2613 // a link to bytes the server serves directly rather than to a page route, so 2614 // it never resolves to a RoutablePage 2615 pub const raw_link_prefix = "ax:"; 2616 2617 // a route already loaded into the current page; focusing it changes the url 2618 // without rebuilding the page 2619 pub const in_page_link_prefix = "ai:"; 2620 2621 // an in-page tab's base route, or the exact current route when it is selected 2622 pub fn inPageTabLink(session: *Session, route: RoutablePage, selected: bool) ![]const u8 { 2623 const target = if (selected) session.data.current_page else route; 2624 return std.fmt.allocPrint(session.page_arena.allocator(), "{s}{s}", .{ in_page_link_prefix, try target.toUrl(session.page_arena) }); 2625 } 2626 2627 // a button the web renderer covers with a file picker that posts the chosen 2628 // file to the url after the prefix 2629 pub const file_input_prefix = "file:"; 2630 2631 // a submit button that overrides its enclosing form's action 2632 pub const submit_action_prefix = "submit:"; 2633 2634 // one option of a radio field, as `radio:<name>=<value>` 2635 pub const radio_prefix = "radio:"; 2636 2637 // the url an `ax:` link points at, or null for anything else. a host that 2638 // suppresses the anchor's own navigation needs this to follow the link. 2639 pub fn rawLink(root_focus: *Focus, focus_id: usize) ?[]const u8 { 2640 const child = root_focus.children.get(focus_id) orelse return null; 2641 const custom = switch (child.focus.kind) { 2642 .custom => |c| c, 2643 else => return null, 2644 }; 2645 if (!std.mem.startsWith(u8, custom, raw_link_prefix)) return null; 2646 return custom[raw_link_prefix.len..]; 2647 } 2648 2649 fn requestRawLink(session: *Session, url: []const u8) !void { 2650 session.host_request = .{ .show_copyable_text = try terminalWebUrl(session.page_arena.allocator(), session, url) }; 2651 } 2652 2653 pub fn terminalWebUrl(allocator: std.mem.Allocator, session: *const Session, path: []const u8) ![]const u8 { 2654 // an absolute url is already complete 2655 if (!std.mem.startsWith(u8, path, "/")) return path; 2656 return if (session.web_port) |port| 2657 try std.fmt.allocPrint(allocator, "http://localhost:{d}{s}", .{ port, path }) 2658 else 2659 path; 2660 } 2661 2662 // if the focus target at focus_id is an `a:` link that should navigate (a 2663 // different parent page, or a different files directory within the repo page), 2664 // return its route; otherwise null. lets a host turn a click / enter on such a 2665 // link into a navigation rather than a focus change. 2666 pub fn crossPageLink(root_focus: *Focus, focus_id: usize, data: Session.Data) ?RoutablePage { 2667 const current = data.current_page; 2668 const route = pageLink(root_focus, focus_id, data, "a:") orelse return null; 2669 // a link to a different parent page always navigates; within a page, a 2670 // files-directory / commits-page / list-window change navigates while tab 2671 // links stay in-page. 2672 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; 2673 return null; 2674 } 2675 2676 // the route carried by an `ai:` focus target, or null for any other target 2677 pub fn inPageLink(root_focus: *Focus, focus_id: usize, data: Session.Data) ?RoutablePage { 2678 return pageLink(root_focus, focus_id, data, in_page_link_prefix); 2679 } 2680 2681 fn pageLink(root_focus: *Focus, focus_id: usize, data: Session.Data, prefix: []const u8) ?RoutablePage { 2682 const child = root_focus.children.get(focus_id) orelse return null; 2683 const custom = switch (child.focus.kind) { 2684 .custom => |c| c, 2685 else => return null, 2686 }; 2687 if (!std.mem.startsWith(u8, custom, prefix)) return null; 2688 const path = custom[prefix.len..]; 2689 // local sessions build (and parse) links with the repo identity elided 2690 return if (data.host_kind == .local) RoutablePage.fromUrlLocal(path) else RoutablePage.fromUrl(path); 2691 } 2692 2693 // a display author, resolved against the admin db at read time 2694 pub const Author = union(enum) { 2695 unknown, 2696 email: []const u8, // an email no user matches 2697 user_name: []const u8, 2698 2699 // the commit author line's email, resolved like initFromEmail 2700 pub fn init( 2701 haxy_moment: ?evt.AdminDB.HashMap(.read_only), 2702 arena: *std.heap.ArenaAllocator, 2703 author_line: []const u8, 2704 ) !Author { 2705 return initFromEmail(haxy_moment, arena, evt.authorEmail(author_line)); 2706 } 2707 2708 // from a record's stored author email: it resolves to the user currently 2709 // holding it, else stays the email. the result is allocated in `arena`, 2710 // so the email may borrow transient memory. 2711 pub fn initFromEmail( 2712 haxy_moment: ?evt.AdminDB.HashMap(.read_only), 2713 arena: *std.heap.ArenaAllocator, 2714 author_email: ?[]const u8, 2715 ) !Author { 2716 const email = author_email orelse return .unknown; 2717 if (haxy_moment) |moment| { 2718 if (try evt.User.readByEmail(evt.AdminDB, evt.admin_repo_opts.hash, moment, arena, email)) |user| { 2719 return .{ .user_name = user.name }; 2720 } 2721 } 2722 return .{ .email = try arena.allocator().dupe(u8, email) }; 2723 } 2724 }; 2725 2726 // the "a:" link to user `name`'s page. 2727 pub fn userLink(page_arena: *std.heap.ArenaAllocator, name: []const u8) ![]const u8 { 2728 const parsed = RoutablePage.Array(evt.User.name_max_len).from(name) orelse return error.RouteTooLong; 2729 const url = try (RoutablePage{ .user_repos = .{ .name = parsed } }).toUrl(page_arena); 2730 return std.fmt.allocPrint(page_arena.allocator(), "a:{s}", .{url}); 2731 } 2732 2733 // a focusable " author " box showing `author`, linking to their user page 2734 // when it is a known user 2735 pub fn authorBox(allocator: std.mem.Allocator, page_arena: *std.heap.ArenaAllocator, author: Author) !wgt.TextBox { 2736 const text = switch (author) { 2737 .unknown => "", 2738 .email, .user_name => |t| t, 2739 }; 2740 var tb = try wgt.TextBox.init(allocator, text, .{ .border_style = .single, .round_corners = true, .wrap_kind = .none, .label = " author " }); 2741 errdefer tb.deinit(allocator); 2742 tb.getFocus().mode = .all; 2743 switch (author) { 2744 .user_name => |name| tb.getFocus().kind = .{ .custom = try userLink(page_arena, name) }, 2745 else => {}, 2746 } 2747 return tb; 2748 } 2749 2750 // native-TUI navigation 2751 pub const Nav = struct { 2752 root: Widget, 2753 // backs the current page (its Page data and the page-scoped strings its 2754 // widgets build). owned here, swapped on each navigation. session.page_arena 2755 // tracks whichever of these is current so widgets allocate into it. 2756 arena: *std.heap.ArenaAllocator, 2757 // the login the current root was built for 2758 user_id: ?[evt.event_id_size]u8, 2759 history: std.ArrayList(Entry), 2760 2761 // each retained page keeps its own arena, freed when the page leaves the 2762 // stack (popped on back, evicted at cap, or on deinit). this is what keeps a 2763 // long-lived session from accumulating every page it ever visited. 2764 const Entry = struct { root: Widget, route: RoutablePage, arena: *std.heap.ArenaAllocator, user_id: ?[evt.event_id_size]u8 }; 2765 2766 // cap on retained back-history so the chain can't grow memory without bound 2767 const max_history: usize = 16; 2768 2769 pub fn init(allocator: std.mem.Allocator, session: *Session) !Nav { 2770 session.back = .unavailable; 2771 const arena = try allocator.create(std.heap.ArenaAllocator); 2772 arena.* = std.heap.ArenaAllocator.init(allocator); 2773 errdefer { 2774 arena.deinit(); 2775 allocator.destroy(arena); 2776 } 2777 2778 return .{ 2779 .root = try initCurrentRoot(allocator, arena, session), 2780 .arena = arena, 2781 .user_id = session.userId(), 2782 .history = .empty, 2783 }; 2784 } 2785 2786 pub fn deinit(self: *Nav, allocator: std.mem.Allocator) void { 2787 self.root.deinit(allocator); 2788 freeArena(allocator, self.arena); 2789 for (self.history.items) |*entry| { 2790 entry.root.deinit(allocator); 2791 freeArena(allocator, entry.arena); 2792 } 2793 self.history.deinit(allocator); 2794 } 2795 2796 // rebuild the current page in place from a current moment 2797 fn rebuild(self: *Nav, allocator: std.mem.Allocator, session: *Session) !void { 2798 if (session.haxy_moment == null and session.local == null) return; 2799 const arena = try allocator.create(std.heap.ArenaAllocator); 2800 arena.* = std.heap.ArenaAllocator.init(allocator); 2801 errdefer freeArena(allocator, arena); 2802 2803 const new_root = try initCurrentRoot(allocator, arena, session); 2804 2805 self.root.deinit(allocator); 2806 freeArena(allocator, self.arena); 2807 self.root = new_root; 2808 self.arena = arena; 2809 self.user_id = session.userId(); 2810 } 2811 2812 // build the current page's root in `arena`, or the not-found page's when 2813 // the route names nothing 2814 fn initCurrentRoot(allocator: std.mem.Allocator, arena: *std.heap.ArenaAllocator, session: *Session) !Widget { 2815 session.page_arena = arena; 2816 const page = try arena.allocator().create(Page); 2817 page.* = Page.init(arena, session, session.data.current_page) catch |err| switch (err) { 2818 error.NotFound => blk: { 2819 session.data.current_page = .not_found; 2820 break :blk .not_found; 2821 }, 2822 else => |e| return e, 2823 }; 2824 return initRoot(allocator, page, session); 2825 } 2826 2827 fn freeArena(allocator: std.mem.Allocator, arena: *std.heap.ArenaAllocator) void { 2828 arena.deinit(); 2829 allocator.destroy(arena); 2830 } 2831 2832 // reconcile the displayed root with the session's navigation state. a 2833 // forward nav (current_page moved to a different parent page) pushes the 2834 // current root and builds the new page in a fresh arena; a back request 2835 // frees the current page and restores the previous one. when escape is 2836 // pressed with no history left we switch to the quit tab instead of quitting. 2837 pub fn sync(self: *Nav, allocator: std.mem.Allocator, session: *Session) !void { 2838 // refresh: rebuild the current page in place from a current moment 2839 if (session.refresh_requested) { 2840 session.refresh_requested = false; 2841 try self.rebuild(allocator, session); 2842 return; 2843 } 2844 2845 if (session.back == .requested) { 2846 if (self.history.pop()) |entry| { 2847 session.back = if (self.history.items.len == 0) .unavailable else .available; 2848 self.root.deinit(allocator); 2849 freeArena(allocator, self.arena); 2850 self.root = entry.root; 2851 self.arena = entry.arena; 2852 self.user_id = entry.user_id; 2853 session.page_arena = entry.arena; 2854 session.data.current_page = entry.route; 2855 // a page built under another login is rebuilt rather than restored 2856 if (!std.meta.eql(entry.user_id, session.userId())) { 2857 try self.rebuild(allocator, session); 2858 return; 2859 } 2860 chooseAnsiArtForNavigation(session); 2861 return; 2862 } 2863 session.back = .unavailable; 2864 // nothing to go back to; switch to the quit confirmation 2865 const root_focus = self.root.getFocus(); 2866 var iter = root_focus.children.iterator(); 2867 while (iter.next()) |entry| { 2868 switch (entry.value_ptr.focus.kind) { 2869 .custom => |custom| if (std.mem.eql(u8, custom, Quit.tab_kind)) { 2870 root_focus.setFocus(entry.key_ptr.*); 2871 // a Stack only builds its selected child, so the quit 2872 // button isn't in the focus tree until a build runs with 2873 // the quit tab selected. build once, then send a 2874 // synthetic arrow_down to drop focus from the tab onto 2875 // the button so it's ready to confirm. 2876 try self.root.build(allocator, .{ 2877 .min_size = .{ .width = null, .height = 40 }, 2878 .max_size = .{ .width = 80, .height = null }, 2879 }, root_focus); 2880 try self.root.input(allocator, .arrow_down, root_focus); 2881 break; 2882 }, 2883 else => {}, 2884 } 2885 } 2886 return; 2887 } 2888 2889 // forward navigation: navigate() set next_page to the page to move to (a 2890 // cross-page link or tab change crossing pages) 2891 if (session.next_page) |route| { 2892 session.next_page = null; 2893 if (session.haxy_moment == null and session.local == null) return; 2894 const previous_route = session.data.current_page; 2895 // the page we navigated to becomes the current page 2896 session.data.current_page = route; 2897 session.back = .available; 2898 2899 const arena = try allocator.create(std.heap.ArenaAllocator); 2900 arena.* = std.heap.ArenaAllocator.init(allocator); 2901 errdefer freeArena(allocator, arena); 2902 2903 const new_root = try initCurrentRoot(allocator, arena, session); 2904 2905 try self.history.append(allocator, .{ .root = self.root, .route = previous_route, .arena = self.arena, .user_id = self.user_id }); 2906 // drop the oldest entry (freeing its widget tree and arena) once over cap 2907 if (self.history.items.len > max_history) { 2908 var oldest = self.history.orderedRemove(0); 2909 oldest.root.deinit(allocator); 2910 freeArena(allocator, oldest.arena); 2911 } 2912 self.root = new_root; 2913 self.arena = arena; 2914 self.user_id = session.userId(); 2915 } 2916 } 2917 }; 2918 2919 pub fn initRoot(allocator: std.mem.Allocator, page: *const Page, session: *Session) !Widget { 2920 const page_widget: Widget = switch (page.*) { 2921 .home => |*p| .{ .home = try .init(allocator, p, session) }, 2922 .user => |*p| .{ .user = try .init(allocator, p, session) }, 2923 .repo => |*p| .{ .repo = try .init(allocator, p, session) }, 2924 .fork => |*p| .{ .fork = try .init(allocator, p, session) }, 2925 .not_found => .{ .not_found = try .init(allocator, session) }, 2926 }; 2927 2928 chooseAnsiArtForNavigation(session); 2929 2930 // on the TUI/SSH, the page sits above a one-row footer showing its web 2931 // url, when there's a web UI to point at 2932 var root = if (session.is_terminal) blk: { 2933 var box = try wgt.Box(Widget).init(allocator, .{ .border_style = null, .direction = .vert }); 2934 errdefer box.deinit(allocator); 2935 const bg_id = bg_blk: { 2936 var background = try widget.AnsiBackground.init(allocator, page_widget, session); 2937 errdefer background.deinit(allocator); 2938 const id = background.getFocus().id; 2939 try box.children.put(allocator, id, .{ .widget = .{ .background = background }, .rect = null, .min_size = null }); 2940 break :bg_blk id; 2941 }; 2942 if (session.web_port != null) { 2943 var footer = try widget.Footer.init(allocator, session); 2944 errdefer footer.deinit(allocator); 2945 try box.children.put(allocator, footer.getFocus().id, .{ .widget = .{ .footer = footer }, .rect = null, .min_size = .{ .width = null, .height = 1 } }); 2946 } 2947 box.getFocus().child_id = bg_id; 2948 break :blk Widget{ .box = box }; 2949 } else Widget{ .background = try widget.AnsiBackground.init(allocator, page_widget, session) }; 2950 errdefer root.deinit(allocator); 2951 2952 // input-owning views build their TextInputs in init, so reset their 2953 // registrations here 2954 session.text_inputs.clearRetainingCapacity(); 2955 2956 try root.build(allocator, .{ 2957 .min_size = .{ .width = null, .height = 40 }, 2958 .max_size = .{ .width = 100, .height = null }, 2959 }, root.getFocus()); 2960 2961 return root; 2962 } 2963 2964 // native and server-side sessions choose from the embedded collection. WASM 2965 // keeps the art serialized by the server instead. 2966 fn chooseAnsiArtForNavigation(session: *Session) void { 2967 if (comptime ansi_art.art.len == 0) return; 2968 if (session.data.current_page == .not_found) { 2969 session.data.ansi_art = ansi_art.not_found; 2970 return; 2971 } 2972 const io = session.io orelse return; 2973 var random: usize = undefined; 2974 io.random(std.mem.asBytes(&random)); 2975 session.data.ansi_art = ansi_art.art[random % ansi_art.art.len]; 2976 } 2977