╭─────────────╮ │scroll to top│ ╰─────────────╯ ╭ web.zig ──────────────────────────────────────────────────────╮ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ ╰───────────────────────────────────────────────────────────────╯
🬐 🬠 🬞🬂🬏 🬟 🬑 🬟 🬑 ╭e5771586..╮ e5771586.. see-em: 🬋🬋🬋 🬋🬋🬋 🬋 🬋 │files │ commits refs discuss issues new login 🬐 🬠 🬐 🬠 🬑 🬟 🬰 ╰──────────╯ (634) 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 │ ╰─────────────────────────────────╯
1946 break :blk session; 1947 }, 1948 .local => |local| ui.Session{ 1949 .data = session_data, 1950 .arena = &page_arena, 1951 .page_arena = &page_arena, 1952 .local = local, 1953 }, 1954 }; 1955 session.io = io; 1956 1957 var page = try ui.Page.init(session.page_arena, &session, session.data.current_page); 1958 var root = try ui.initRoot(allocator, &page, &session); 1959 defer root.deinit(allocator); 1960 1961 const snapshot: ui.Snapshot = .{ .page = page, .session = session.data }; 1962 1963 const content = try generateHtml(allocator, &root, &session); 1964 defer allocator.free(content); 1965 1966 // serialize the snapshot so the wasm side can parse it back without making 1967 // a second request. it's embedded raw in a <script type="application/json"> 1968 // block, whose content is raw text terminated only by "</script". in json, 1969 // '<' appears solely inside string values, so escaping every '<' (and '>' 1970 // for good measure) to its \uXXXX form yields equivalent json that can't 1971 // break out of the tag. 1972 var json: std.Io.Writer.Allocating = .init(allocator); 1973 defer json.deinit(); 1974 try std.json.Stringify.value(snapshot, .{}, &json.writer); 1975 1976 var json_escaped: std.ArrayList(u8) = .empty; 1977 defer json_escaped.deinit(allocator); 1978 for (json.written()) |c| switch (c) { 1979 '<' => try json_escaped.appendSlice(allocator, "\\u003c"), 1980 '>' => try json_escaped.appendSlice(allocator, "\\u003e"), 1981 else => try json_escaped.append(allocator, c), 1982 }; 1983 1984 var out: std.ArrayList(u8) = .empty; 1985 errdefer out.deinit(allocator); 1986 { 1987 var cursor: usize = 0; 1988 for (&[_]struct { needle: []const u8, replacement: []const u8 }{ 1989 .{ .needle = "{{{ HAXY_HTML }}}", .replacement = content }, 1990 .{ .needle = "{{{ HAXY_JSON }}}", .replacement = json_escaped.items }, 1991 }) |sub| { 1992 const idx = std.mem.indexOfPos(u8, template, cursor, sub.needle) orelse return error.MissingTemplateToken; 1993 try out.appendSlice(allocator, template[cursor..idx]); 1994 try out.appendSlice(allocator, sub.replacement); 1995 cursor = idx + sub.needle.len; 1996 } 1997 try out.appendSlice(allocator, template[cursor..]); 1998 } 1999 return try out.toOwnedSlice(allocator); 2000 } 2001 2002 fn findEmbed(request_path: []const u8) ?Embed { 2003 // embeds are matched before pages, so a dot keeps them from claiming a username or tab 2004 comptime for (embeds) |embed| { 2005 if (std.mem.indexOfScalar(u8, embed.path, '.') == null) @compileError("embed path needs a '.' so it can't shadow a page: " ++ embed.path); 2006 }; 2007 if (request_path.len < 2 or request_path[0] != '/') return null; 2008 const path = request_path[1..]; 2009 2010 for (embeds) |embed| { 2011 if (std.mem.eql(u8, path, embed.path)) return embed; 2012 } 2013 return null; 2014 } 2015 2016 // emits the TUI grid cells as static HTML. each web-native Scroll becomes its 2017 // own absolutely-positioned, natively-scrollable <div> holding its full content, 2018 // rendered recursively so nested scrolls work. 2019 pub fn generateHtml(allocator: std.mem.Allocator, root: *ui.Widget, session: *ui.Session) ![]const u8 { 2020 const grid = root.getGrid() orelse return error.MissingGrid; 2021 const root_focus = root.getFocus(); 2022 2023 var out: std.ArrayList(u8) = .empty; 2024 errdefer out.deinit(allocator); 2025 2026 switch (root.*) { 2027 .background => |*background| { 2028 if (background.art.getGrid()) |art| { 2029 try out.print(allocator, "<div class=\"ansi-art\" aria-hidden=\"true\" style=\"left:{d}ch;opacity:{d}%\">", .{ grid.size.width -| art.size.width, ui.widget.AnsiBackground.art_opacity }); 2030 try renderPanel(allocator, &out, background.art.getFocus(), art, session, root_focus); 2031 try out.appendSlice(allocator, "</div>"); 2032 } 2033 }, 2034 else => {}, 2035 } 2036 try out.appendSlice(allocator, "<div class=\"grid-content\" data-key=\"panel:root\">"); 2037 try renderPanel(allocator, &out, root_focus, grid, session, root_focus); 2038 try out.appendSlice(allocator, "</div>"); 2039 try renderForms(allocator, &out, root_focus); 2040 return try out.toOwnedSlice(allocator); 2041 } 2042 2043 // render one panel — a focus subtree and its content grid — as HTML, recursing 2044 // once per web-native Scroll inside it. the root panel is the whole page; each 2045 // Scroll becomes a nested, natively-scrollable div holding its full content. 2046 // emits the panel's grid cells as text, leaving holes where child scrolls sit, 2047 // then the child scroll divs over those holes. 2048 fn renderPanel(allocator: std.mem.Allocator, output: *std.ArrayList(u8), focus: *Focus, grid: Grid, session: *ui.Session, root_focus: *Focus) !void { 2049 // `direct` is this panel's scroll children, each drawn as an overlaid div. 2050 // `excluded` is every focus id that belongs to a scroll (the scroll nodes 2051 // plus their descendants, which the focus tree flattens into this panel's 2052 // children): the cell hit-test below skips them so this panel doesn't claim 2053 // cells that are really rendered inside a child scroll's own panel. 2054 // (scrolls aren't nested in practice, so every scroll child is direct here.) 2055 var direct: std.ArrayList(usize) = .empty; 2056 defer direct.deinit(allocator); 2057 var excluded: std.AutoHashMapUnmanaged(usize, void) = .empty; 2058 defer excluded.deinit(allocator); 2059 { 2060 var it = focus.children.iterator(); 2061 while (it.next()) |e| { 2062 if (e.value_ptr.focus.scroll == null) continue; 2063 try direct.append(allocator, e.key_ptr.*); 2064 try excluded.put(allocator, e.key_ptr.*, {}); 2065 var mit = e.value_ptr.focus.children.iterator(); 2066 while (mit.next()) |m| try excluded.put(allocator, m.key_ptr.*, {}); 2067 } 2068 } 2069 2070 // the HTML element a run of cells is wrapped in, chosen from the cell's 2071 // focusable kind 2072 const CellTag = union(enum) { 2073 span, // clickable focusable cell 2074 a: []const u8, // clickable focusable link 2075 plain, // non-focusable, colored 2076 2077 const a_prefix = "a:"; 2078 // an "in-page" anchor: rendered as a real <a href> so it works with js 2079 // disabled, but wasm handles it without navigating. 2080 fn init(str: []const u8) @This() { 2081 if (std.mem.startsWith(u8, str, ui.raw_link_prefix)) { 2082 return .{ .a = str[ui.raw_link_prefix.len..] }; 2083 } 2084 if (std.mem.startsWith(u8, str, ui.in_page_link_prefix)) { 2085 return .{ .a = str[ui.in_page_link_prefix.len..] }; 2086 } 2087 if (std.mem.startsWith(u8, str, a_prefix)) { 2088 return .{ .a = str[a_prefix.len..] }; 2089 } 2090 return .span; 2091 } 2092 2093 fn writeOpenTag(self: @This(), alloc: std.mem.Allocator, out: *std.ArrayList(u8), id: usize, style_attr: []const u8) !void { 2094 var id_buf: [32]u8 = undefined; 2095 switch (self) { 2096 .span => { 2097 try out.appendSlice(alloc, "<span class=\"clickable\" data-focus-id=\""); 2098 try out.appendSlice(alloc, try std.fmt.bufPrint(&id_buf, "{d}", .{id})); 2099 try out.appendSlice(alloc, "\""); 2100 try out.appendSlice(alloc, style_attr); 2101 try out.appendSlice(alloc, ">"); 2102 }, 2103 .a => |href| { 2104 // tabindex=-1 keeps these out of the browser's tab order 2105 try out.appendSlice(alloc, "<a class=\"clickable\" tabindex=\"-1\" data-focus-id=\""); 2106 try out.appendSlice(alloc, try std.fmt.bufPrint(&id_buf, "{d}", .{id})); 2107 try out.appendSlice(alloc, "\" href=\""); 2108 try appendEscapedHtml(alloc, out, href); 2109 try out.appendSlice(alloc, "\""); 2110 try out.appendSlice(alloc, style_attr); 2111 try out.appendSlice(alloc, ">"); 2112 }, 2113 .plain => { 2114 try out.appendSlice(alloc, "<span"); 2115 try out.appendSlice(alloc, style_attr); 2116 try out.appendSlice(alloc, ">"); 2117 }, 2118 } 2119 } 2120 2121 fn closeTag(self: @This()) []const u8 { 2122 return switch (self) { 2123 .span, .plain => "</span>", 2124 .a => "</a>", 2125 }; 2126 } 2127 }; 2128 2129 // the focusable owning each cell, among this panel's own (skipping any 2130 // that belong to a child scroll, whose cells are drawn in their own panel). 2131 // claimed in focus order, so the first focusable over a cell keeps it. 2132 // looking every focusable up for every cell is quadratic in a long list. 2133 const owners = try allocator.alloc(?usize, grid.size.width * grid.size.height); 2134 defer allocator.free(owners); 2135 @memset(owners, null); 2136 { 2137 var it = focus.children.iterator(); 2138 while (it.next()) |entry| { 2139 const child = entry.value_ptr.*; 2140 if (child.focus.mode != .all) continue; 2141 if (excluded.contains(entry.key_ptr.*)) continue; 2142 const r = child.rect; 2143 for (@min(r.y, grid.size.height)..@min(r.y + r.size.height, grid.size.height)) |y| { 2144 for (@min(r.x, grid.size.width)..@min(r.x + r.size.width, grid.size.width)) |x| { 2145 const owner = &owners[y * grid.size.width + x]; 2146 if (owner.* == null) owner.* = entry.key_ptr.*; 2147 } 2148 } 2149 } 2150 } 2151 2152 // the cells are the volatile part of a panel. js replaces this one subtree 2153 // wholesale while retaining the panel's native controls and scroll shells. 2154 try output.appendSlice(allocator, "<div class=\"grid-cells\">"); 2155 2156 // emit this panel's grid as rows of text, coalescing adjacent cells that 2157 // share a focus id and style into one tag (a clickable span, a link, or a 2158 // plain styled span). cells under a child scroll keep only their background. 2159 // a cell's own link is an anchor nested in that tag. 2160 for (0..grid.size.height) |y| { 2161 var cur_id: ?usize = null; 2162 var cur_style: Grid.Style = .{}; 2163 var open_tag: ?CellTag = null; 2164 var open_link: ?[]const u8 = null; 2165 var first = true; 2166 for (0..grid.size.width) |x| { 2167 const cell = (try grid.cell(x, y)).*; 2168 // a cell covered by a child scroll's viewport is drawn by that scroll's 2169 // own div, so blank its glyph and make it non-clickable here — but keep 2170 // its background, so the backdrop still shows through the scroll's 2171 // transparent div instead of a bare hole. 2172 const covered_by_scroll = blk: { 2173 for (direct.items) |id| { 2174 const r = (focus.children.get(id) orelse continue).rect; 2175 if (x >= r.x and y >= r.y and x < r.x + r.size.width and y < r.y + r.size.height) break :blk true; 2176 } 2177 break :blk false; 2178 }; 2179 // the focusable owning the cell at (x, y); none for a covered cell. 2180 const cell_id = if (covered_by_scroll) null else owners[y * grid.size.width + x]; 2181 const style: Grid.Style = if (covered_by_scroll) .{ .bg = cell.style.bg } else cell.style; 2182 2183 if (first or cell_id != cur_id or !style.eql(cur_style)) { 2184 if (open_link != null) try output.appendSlice(allocator, "</a>"); 2185 open_link = null; 2186 if (open_tag) |t| try output.appendSlice(allocator, t.closeTag()); 2187 2188 var new_tag: ?CellTag = null; 2189 if (cell_id) |id| { 2190 if (focus.children.get(id)) |child| { 2191 new_tag = switch (child.focus.kind) { 2192 .custom => |custom| CellTag.init(custom), 2193 else => .span, 2194 }; 2195 } 2196 } 2197 if (new_tag == null and !style.eql(.{})) new_tag = .plain; 2198 2199 if (new_tag) |t| { 2200 var style_buf: [192]u8 = undefined; 2201 try t.writeOpenTag(allocator, output, cell_id orelse 0, styleAttr(&style_buf, style)); 2202 } 2203 2204 open_tag = new_tag; 2205 cur_id = cell_id; 2206 cur_style = style; 2207 first = false; 2208 } 2209 2210 // an anchor can't nest in another, so a link tag's cells skip theirs 2211 const in_anchor = if (open_tag) |t| t == .a else false; 2212 const link = if (covered_by_scroll or in_anchor) null else webLink(cell.link); 2213 if (!sameLink(link, open_link)) { 2214 if (open_link != null) try output.appendSlice(allocator, "</a>"); 2215 if (link) |url| { 2216 try output.appendSlice(allocator, "<a class=\"cell-link\" tabindex=\"-1\" target=\"_blank\" rel=\"noopener noreferrer\" href=\""); 2217 try appendEscapedHtml(allocator, output, url); 2218 try output.appendSlice(allocator, "\">"); 2219 } 2220 open_link = link; 2221 } 2222 2223 if (covered_by_scroll) { 2224 try appendEscapedHtml(allocator, output, " "); 2225 } else if (cell.continuation) { 2226 // the wide rune to the left was emitted 2ch wide, covering this column 2227 } else if (cell.rune) |rune| { 2228 var encoded: [4]u8 = undefined; 2229 const encoded_len = try std.unicode.utf8Encode(rune, &encoded); 2230 const rune_text = encoded[0..encoded_len]; 2231 // a double-width rune is pinned inside a 2ch span so the 2232 // fallback glyph's advance width can't shift the rest of the row 2233 const wide = x + 1 < grid.size.width and (try grid.cell(x + 1, y)).continuation; 2234 if (wide) { 2235 try output.appendSlice(allocator, "<span class=\"w2\">"); 2236 try appendEscapedHtml(allocator, output, rune_text); 2237 try output.appendSlice(allocator, "</span>"); 2238 } else { 2239 try appendEscapedHtml(allocator, output, rune_text); 2240 } 2241 } else { 2242 try appendEscapedHtml(allocator, output, " "); 2243 } 2244 } 2245 if (open_link != null) try output.appendSlice(allocator, "</a>"); 2246 if (open_tag) |t| try output.appendSlice(allocator, t.closeTag()); 2247 try output.append(allocator, '\n'); 2248 } 2249 try output.appendSlice(allocator, "</div>"); 2250 2251 // native controls live in their panel, beside the replaceable cells. their 2252 // stable keys let JS update layout without recreating their DOM nodes, and 2253 // being actual descendants of a scroll gives them native movement/clipping. 2254 try renderPanelControls(allocator, output, focus, session, root_focus, &excluded); 2255 2256 // each child scroll becomes a natively-scrollable div positioned over its 2257 // viewport, holding its full content rendered recursively. 2258 for (direct.items) |id| { 2259 const child = focus.children.get(id) orelse continue; 2260 const info = child.focus.scroll orelse continue; 2261 const r = child.rect; 2262 // overflow only on the axes the widget scrolls; `auto` shows a bar only 2263 // when that axis actually overflows. the other axis is clipped (hidden), 2264 // matching how the terminal Scroll handles its non-scrolling axis. 2265 const overflow = switch (info.direction) { 2266 .vert => "overflow-x:hidden;overflow-y:auto", 2267 .horiz => "overflow-x:auto;overflow-y:hidden", 2268 .both => "overflow:auto", 2269 }; 2270 // the id carries a content version so JS preserves the native scroll 2271 // position across re-renders of the same content but resets it when the 2272 // content is replaced — e.g. selecting a different commit. the widget's 2273 // scroll offset (in cells) rides along so JS can apply it when it has no 2274 // preserved position, letting a wasm-side scrollToRect (the files list 2275 // scrolling to its selected row on page load) reach the browser. 2276 var buf: [256]u8 = undefined; 2277 try output.appendSlice(allocator, try std.fmt.bufPrint(&buf, "<div class=\"scroll\" data-key=\"scroll:{d}\" data-scroll-id=\"{d}-{d}\" data-scroll-direction=\"{s}\" data-scroll-x=\"{d}\" data-scroll-y=\"{d}\" style=\"left:{d}ch;top:{d}em;width:{d}ch;height:{d}em;{s}\">", .{ id, id, child.focus.version, @tagName(info.direction), info.offset_x, info.offset_y, r.x, r.y, r.size.width, r.size.height, overflow })); 2278 try renderPanel(allocator, output, child.focus, info.content, session, root_focus); 2279 try output.appendSlice(allocator, "</div>"); 2280 } 2281 } 2282 2283 const form_prefix = "form:"; 2284 const form_id_prefix = "haxy-form-"; 2285 2286 fn formAction(focus: *const Focus) ?[]const u8 { 2287 return switch (focus.kind) { 2288 .custom => |custom| if (std.mem.startsWith(u8, custom, form_prefix)) custom[form_prefix.len..] else null, 2289 else => null, 2290 }; 2291 } 2292 2293 // find the form ancestor of a flattened focus-tree child. html's `form` 2294 // attribute then associates the control with that form without requiring the 2295 // form and control to share a DOM parent. 2296 fn formOwner(root_focus: *Focus, focus_id: usize) ?usize { 2297 var id = focus_id; 2298 while (root_focus.children.get(id)) |child| { 2299 const parent_id = child.parent_id; 2300 if (parent_id == root_focus.id) return if (formAction(root_focus) != null) root_focus.id else null; 2301 const parent = root_focus.children.get(parent_id) orelse return null; 2302 if (formAction(parent.focus) != null) return parent_id; 2303 id = parent_id; 2304 } 2305 return null; 2306 } 2307 2308 fn appendFormAttribute(allocator: std.mem.Allocator, output: *std.ArrayList(u8), root_focus: *Focus, focus_id: usize) !void { 2309 const form_id = formOwner(root_focus, focus_id) orelse return; 2310 var buf: [64]u8 = undefined; 2311 try output.appendSlice(allocator, try std.fmt.bufPrint(&buf, " form=\"" ++ form_id_prefix ++ "{d}\"", .{form_id})); 2312 } 2313 2314 fn renderPanelControls( 2315 allocator: std.mem.Allocator, 2316 output: *std.ArrayList(u8), 2317 focus: *Focus, 2318 session: *ui.Session, 2319 root_focus: *Focus, 2320 excluded: *const std.AutoHashMapUnmanaged(usize, void), 2321 ) !void { 2322 var iter = focus.children.iterator(); 2323 while (iter.next()) |entry| { 2324 const id = entry.key_ptr.*; 2325 if (excluded.contains(id)) continue; 2326 const child = entry.value_ptr.*; 2327 const r = child.rect; 2328 2329 if (r.size.width == 0 or r.size.height == 0) continue; // not laid out, rather than merely off-screen 2330 2331 switch (child.focus.kind) { 2332 .text_input, .text_input_password, .text_area => { 2333 const ti = session.text_inputs.get(id) orelse continue; 2334 2335 const inner_left = r.x + 1; 2336 const inner_top = r.y + 1; 2337 const inner_width = if (r.size.width > 2) r.size.width - 2 else 0; 2338 const preserve = !ti.options.read_only; 2339 2340 if (child.focus.kind == .text_area) { 2341 const value = try ti.text(allocator); 2342 defer allocator.free(value); 2343 var id_buf: [128]u8 = undefined; 2344 try output.appendSlice(allocator, try std.fmt.bufPrint(&id_buf, "<textarea data-key=\"control:{d}\" data-focus-id=\"{d}\"", .{ id, id })); 2345 if (preserve) try output.appendSlice(allocator, " data-preserve-value") else try output.appendSlice(allocator, " readonly"); 2346 try appendFormAttribute(allocator, output, root_focus, id); 2347 if (ti.options.name.len > 0) { 2348 try output.appendSlice(allocator, " name=\""); 2349 try appendEscapedHtml(allocator, output, ti.options.name); 2350 try output.append(allocator, '"'); 2351 } 2352 const inner_height = if (r.size.height > 2) r.size.height - 2 else 0; 2353 var pos_buf: [128]u8 = undefined; 2354 try output.appendSlice(allocator, try std.fmt.bufPrint(&pos_buf, " style=\"left:{d}ch;top:{d}em;width:{d}ch;height:{d}em\">\n", .{ inner_left, inner_top, inner_width, inner_height })); 2355 try appendEscapedHtml(allocator, output, value); 2356 try output.appendSlice(allocator, "</textarea>"); 2357 continue; 2358 } 2359 2360 var id_buf: [160]u8 = undefined; 2361 try output.appendSlice(allocator, try std.fmt.bufPrint(&id_buf, "<input type=\"{s}\" data-key=\"control:{d}\" data-focus-id=\"{d}\"", .{ if (child.focus.kind == .text_input_password) "password" else "text", id, id })); 2362 if (preserve) try output.appendSlice(allocator, " data-preserve-value") else try output.appendSlice(allocator, " readonly"); 2363 try appendFormAttribute(allocator, output, root_focus, id); 2364 if (ti.options.name.len > 0) { 2365 try output.appendSlice(allocator, " name=\""); 2366 try appendEscapedHtml(allocator, output, ti.options.name); 2367 try output.append(allocator, '"'); 2368 } 2369 if (child.focus.kind != .text_input_password) { 2370 const value = try ti.text(allocator); 2371 defer allocator.free(value); 2372 try output.appendSlice(allocator, " value=\""); 2373 try appendEscapedHtml(allocator, output, value); 2374 try output.append(allocator, '"'); 2375 } 2376 var pos_buf: [96]u8 = undefined; 2377 try output.appendSlice(allocator, try std.fmt.bufPrint(&pos_buf, " style=\"left:{d}ch;top:{d}em;width:{d}ch;height:1em\">", .{ inner_left, inner_top, inner_width })); 2378 }, 2379 .custom => |custom| { 2380 if (std.mem.eql(u8, custom, "submit") or std.mem.startsWith(u8, custom, ui.submit_action_prefix)) { 2381 if (formOwner(root_focus, id) == null) continue; 2382 var id_buf: [128]u8 = undefined; 2383 try output.appendSlice(allocator, try std.fmt.bufPrint(&id_buf, "<button type=\"submit\" data-key=\"control:{d}\" data-focus-id=\"{d}\"", .{ id, id })); 2384 try appendFormAttribute(allocator, output, root_focus, id); 2385 if (std.mem.startsWith(u8, custom, ui.submit_action_prefix)) { 2386 try output.appendSlice(allocator, " formaction=\""); 2387 try appendEscapedHtml(allocator, output, custom[ui.submit_action_prefix.len..]); 2388 try output.append(allocator, '"'); 2389 } 2390 var pos_buf: [128]u8 = undefined; 2391 try output.appendSlice(allocator, try std.fmt.bufPrint(&pos_buf, " style=\"left:{d}ch;top:{d}em;width:{d}ch;height:{d}em\"></button>", .{ r.x, r.y, r.size.width, r.size.height })); 2392 } else if (std.mem.startsWith(u8, custom, ui.radio_prefix)) { 2393 // an invisible native radio over the option, checked when the option is its row's selection 2394 const field = custom[ui.radio_prefix.len..]; 2395 const separator = std.mem.indexOfScalar(u8, field, '=') orelse continue; 2396 const row = root_focus.children.get(child.parent_id) orelse continue; 2397 var id_buf: [128]u8 = undefined; 2398 try output.appendSlice(allocator, try std.fmt.bufPrint(&id_buf, "<input type=\"radio\" data-key=\"control:{d}\" data-focus-id=\"{d}\"", .{ id, id })); 2399 try appendFormAttribute(allocator, output, root_focus, id); 2400 try output.appendSlice(allocator, " name=\""); 2401 try appendEscapedHtml(allocator, output, field[0..separator]); 2402 try output.appendSlice(allocator, "\" value=\""); 2403 try appendEscapedHtml(allocator, output, field[separator + 1 ..]); 2404 try output.append(allocator, '"'); 2405 if (row.focus.child_id == id) try output.appendSlice(allocator, " checked"); 2406 var pos_buf: [128]u8 = undefined; 2407 try output.appendSlice(allocator, try std.fmt.bufPrint(&pos_buf, " style=\"opacity:0;left:{d}ch;top:{d}em;width:{d}ch;height:{d}em\">", .{ r.x, r.y, r.size.width, r.size.height })); 2408 } else if (std.mem.startsWith(u8, custom, ui.file_input_prefix)) { 2409 try output.appendSlice(allocator, "<input type=\"file\" data-preserve-value data-action=\""); 2410 try appendEscapedHtml(allocator, output, custom[ui.file_input_prefix.len..]); 2411 var id_buf: [128]u8 = undefined; 2412 try output.appendSlice(allocator, try std.fmt.bufPrint(&id_buf, "\" data-key=\"control:{d}\" data-focus-id=\"{d}\" style=\"opacity:0;left:{d}ch;top:{d}em;width:{d}ch;height:{d}em\">", .{ id, id, r.x, r.y, r.size.width, r.size.height })); 2413 } 2414 }, 2415 else => {}, 2416 } 2417 } 2418 } 2419 2420 // emit hidden form owners beside the rendered panels. their controls point 2421 // back here with the standard HTML `form` attribute. 2422 fn renderForms(allocator: std.mem.Allocator, output: *std.ArrayList(u8), root_focus: *Focus) !void { 2423 // the focus child map preserves insertion order, which matches the order 2424 // widgets were added in code 2425 var iter = root_focus.children.iterator(); 2426 while (iter.next()) |entry| { 2427 const child = entry.value_ptr.*; 2428 const action_url = formAction(child.focus) orelse continue; 2429 2430 try output.appendSlice(allocator, "<form hidden data-key=\"form:"); 2431 var id_buf: [96]u8 = undefined; 2432 try output.appendSlice(allocator, try std.fmt.bufPrint(&id_buf, "{d}\" id=\"" ++ form_id_prefix ++ "{d}\" action=\"", .{ entry.key_ptr.*, entry.key_ptr.* })); 2433 try appendEscapedHtml(allocator, output, action_url); 2434 try output.appendSlice(allocator, "\" method=\"post\"></form>"); 2435 } 2436 } 2437 2438 // the 16 ansi colors as the browser shows them (xterm's defaults) 2439 const ansi_palette = [16]Grid.Color.Rgb{ 2440 .{ .r = 0x00, .g = 0x00, .b = 0x00 }, .{ .r = 0xcd, .g = 0x00, .b = 0x00 }, .{ .r = 0x00, .g = 0xcd, .b = 0x00 }, .{ .r = 0xcd, .g = 0xcd, .b = 0x00 }, 2441 .{ .r = 0x00, .g = 0x00, .b = 0xee }, .{ .r = 0xcd, .g = 0x00, .b = 0xcd }, .{ .r = 0x00, .g = 0xcd, .b = 0xcd }, .{ .r = 0xe5, .g = 0xe5, .b = 0xe5 }, 2442 .{ .r = 0x7f, .g = 0x7f, .b = 0x7f }, .{ .r = 0xff, .g = 0x00, .b = 0x00 }, .{ .r = 0x00, .g = 0xff, .b = 0x00 }, .{ .r = 0xff, .g = 0xff, .b = 0x00 }, 2443 .{ .r = 0x5c, .g = 0x5c, .b = 0xff }, .{ .r = 0xff, .g = 0x00, .b = 0xff }, .{ .r = 0x00, .g = 0xff, .b = 0xff }, .{ .r = 0xff, .g = 0xff, .b = 0xff }, 2444 }; 2445 2446 // resolve any color to rgb: palette colors through the ansi table and the 2447 // xterm 256-color layout (16 ansi, a 6x6x6 cube, then 24 grays) 2448 fn colorRgb(color: Grid.Color) Grid.Color.Rgb { 2449 return switch (color) { 2450 .rgb => |c| c, 2451 .ansi => |a| ansi_palette[@intFromEnum(a)], 2452 .indexed => |n| if (n < 16) 2453 ansi_palette[n] 2454 else if (n < 232) blk: { 2455 const levels = [6]u8{ 0, 0x5f, 0x87, 0xaf, 0xd7, 0xff }; 2456 const i = n - 16; 2457 break :blk .{ .r = levels[i / 36], .g = levels[(i / 6) % 6], .b = levels[i % 6] }; 2458 } else blk: { 2459 const v: u8 = 8 + (n - 232) * 10; 2460 break :blk .{ .r = v, .g = v, .b = v }; 2461 }, 2462 }; 2463 } 2464 2465 // builds an HTML ` style="color:…;background-color:…"` attribute from a 2466 // cell's style into `buf`, omitting whichever color is unset. an inverted 2467 // cell swaps the two, falling back to the page's --fg/--bg variables for 2468 // whichever side is unset. text attributes follow the colors. returns an 2469 // empty slice when nothing is set. 2470 fn styleAttr(buf: []u8, style: Grid.Style) []const u8 { 2471 if (style.eql(.{})) return buf[0..0]; 2472 const prefix = " style=\""; 2473 @memcpy(buf[0..prefix.len], prefix); 2474 var i: usize = prefix.len; 2475 const inverted = style.inverted; 2476 i = cssColor(buf, i, "color", if (inverted) style.bg else style.fg, if (inverted) "var(--bg)" else null) orelse return buf[0..0]; 2477 i = cssColor(buf, i, "background-color", if (inverted) style.fg else style.bg, if (inverted) "var(--fg)" else null) orelse return buf[0..0]; 2478 const decoration: []const u8 = if (style.underline and style.strikethrough) 2479 "text-decoration:underline line-through;" 2480 else if (style.underline) 2481 "text-decoration:underline;" 2482 else if (style.strikethrough) 2483 "text-decoration:line-through;" 2484 else 2485 ""; 2486 const attributes = std.fmt.bufPrint(buf[i..], "{s}{s}{s}{s}", .{ 2487 if (style.bold) "font-weight:bold;" else "", 2488 if (style.italic) "font-style:italic;" else "", 2489 decoration, 2490 if (style.dim) "opacity:.6;" else "", 2491 }) catch return buf[0..0]; 2492 i += attributes.len; 2493 if (i >= buf.len) return buf[0..0]; 2494 buf[i] = '"'; 2495 return buf[0 .. i + 1]; 2496 } 2497 2498 // append `prop:value;` at buf[i..] for the color, or for the fallback when 2499 // the color is unset (nothing when both are). returns the new end, or null 2500 // when it doesn't fit. 2501 fn cssColor(buf: []u8, i: usize, prop: []const u8, color: ?Grid.Color, fallback: ?[]const u8) ?usize { 2502 const s = if (color) |c| blk: { 2503 const v = colorRgb(c); 2504 break :blk std.fmt.bufPrint(buf[i..], "{s}:#{x:0>2}{x:0>2}{x:0>2};", .{ prop, v.r, v.g, v.b }) catch return null; 2505 } else if (fallback) |f| 2506 std.fmt.bufPrint(buf[i..], "{s}:{s};", .{ prop, f }) catch return null 2507 else 2508 return i; 2509 return i + s.len; 2510 } 2511 2512 // a cell's link as an href, when it's a web or mail url 2513 fn webLink(link: ?[]const u8) ?[]const u8 { 2514 const url = link orelse return null; 2515 for ([_][]const u8{ "http://", "https://", "mailto:" }) |scheme| { 2516 if (std.ascii.startsWithIgnoreCase(url, scheme)) return url; 2517 } 2518 return null; 2519 } 2520 2521 fn sameLink(a: ?[]const u8, b: ?[]const u8) bool { 2522 if (a) |x| return if (b) |y| std.mem.eql(u8, x, y) else false; 2523 return b == null; 2524 } 2525 2526 fn appendEscapedHtml(allocator: std.mem.Allocator, out: *std.ArrayList(u8), input: []const u8) !void { 2527 for (input) |ch| { 2528 switch (ch) { 2529 '&' => try out.appendSlice(allocator, "&amp;"), 2530 '<' => try out.appendSlice(allocator, "&lt;"), 2531 '>' => try out.appendSlice(allocator, "&gt;"), 2532 '"' => try out.appendSlice(allocator, "&quot;"), 2533 '\'' => try out.appendSlice(allocator, "&#39;"), 2534 else => try out.append(allocator, ch), 2535 } 2536 } 2537 } 2538 2539 // --- helpers -------------------------------------------------------------- 2540 2541 fn getCookieValue(request: *std.http.Server.Request, name: []const u8) ?[]const u8 { 2542 var iter = request.iterateHeaders(); 2543 while (iter.next()) |header| { 2544 if (!std.ascii.eqlIgnoreCase(header.name, "cookie")) continue; 2545 var pairs = std.mem.splitScalar(u8, header.value, ';'); 2546 while (pairs.next()) |pair| { 2547 const trimmed = std.mem.trim(u8, pair, " \t"); 2548 const eq = std.mem.indexOfScalar(u8, trimmed, '=') orelse continue; 2549 if (std.mem.eql(u8, trimmed[0..eq], name)) { 2550 return trimmed[eq + 1 ..]; 2551 } 2552 } 2553 } 2554 return null; 2555 } 2556 2557 fn parseFormField(allocator: std.mem.Allocator, body: []const u8, key: []const u8) !?[]u8 { 2558 var iter = std.mem.splitScalar(u8, body, '&'); 2559 while (iter.next()) |pair| { 2560 const eq = std.mem.indexOfScalar(u8, pair, '=') orelse continue; 2561 if (std.mem.eql(u8, pair[0..eq], key)) { 2562 return try decodeFormValue(allocator, pair[eq + 1 ..]); 2563 } 2564 } 2565 return null; 2566 } 2567 2568 fn readFormBody(request: *std.http.Server.Request, allocator: std.mem.Allocator) ![]u8 { 2569 var buffer: [256]u8 = undefined; 2570 return request.readerExpectNone(&buffer).allocRemaining(allocator, .limited(65536)); 2571 } 2572 2573 fn decodeFormValue(allocator: std.mem.Allocator, encoded: []const u8) ![]u8 { 2574 var out: std.ArrayList(u8) = .empty; 2575 errdefer out.deinit(allocator); 2576 var i: usize = 0; 2577 while (i < encoded.len) : (i += 1) { 2578 switch (encoded[i]) { 2579 '+' => try out.append(allocator, ' '), 2580 '%' => { 2581 if (i + 2 >= encoded.len) return error.InvalidPercentEncoding; 2582 const hi = std.fmt.charToDigit(encoded[i + 1], 16) catch return error.InvalidPercentEncoding; 2583 const lo = std.fmt.charToDigit(encoded[i + 2], 16) catch return error.InvalidPercentEncoding; 2584 try out.append(allocator, hi * 16 + lo); 2585 i += 2; 2586 }, 2587 else => try out.append(allocator, encoded[i]), 2588 } 2589 } 2590 return try out.toOwnedSlice(allocator); 2591 } 2592 2593 // disk-backed web session store. each login mints a random, opaque token 2594 // (not the user's id) that is stored as a file named by the token hex, whose 2595 // contents are the raw user_id bytes. authenticating a request is a lookup of 2596 // the cookie's token; logout deletes the file, revoking the session. there is 2597 // deliberately no expiry — a session lives until logout. form failures use 2598 // files in the flash subdirectory that the redirected GET consumes. the 2599 // directory is cleared whenever the server starts. 2600 pub const SessionStore = struct { 2601 io: std.Io, 2602 dir: std.Io.Dir, 2603 flash_dir: std.Io.Dir, 2604 auto_login: ?[token_hex_len]u8, 2605 2606 pub const token_hex_len = evt.event_id_size * 2; 2607 2608 pub fn init(io: std.Io, data_dir: std.Io.Dir) !SessionStore { 2609 try data_dir.createDirPath(io, "sessions"); 2610 const dir = try data_dir.openDir(io, "sessions", .{}); 2611 errdefer dir.close(io); 2612 try dir.deleteTree(io, "flash"); 2613 try dir.createDirPath(io, "flash"); 2614 const flash_dir = try dir.openDir(io, "flash", .{}); 2615 errdefer flash_dir.close(io); 2616 const auto_login = blk: { 2617 const file = dir.openFile(io, auto_login_name, .{ .mode = .read_only }) catch break :blk null; 2618 defer file.close(io); 2619 var token: [token_hex_len]u8 = undefined; 2620 var storage: [token_hex_len]u8 = undefined; 2621 var reader = file.reader(io, &storage); 2622 reader.interface.readSliceAll(&token) catch break :blk null; 2623 break :blk token; 2624 }; 2625 return .{ .io = io, .dir = dir, .flash_dir = flash_dir, .auto_login = auto_login }; 2626 } 2627 2628 pub fn deinit(self: SessionStore) void { 2629 self.flash_dir.close(self.io); 2630 self.dir.close(self.io); 2631 } 2632 2633 // mint a new session for user_id, returning the token hex to set as the 2634 // cookie value. 2635 pub fn create(self: SessionStore, user_id: *const [evt.event_id_size]u8) ![token_hex_len]u8 { 2636 var token: [evt.event_id_size]u8 = undefined; 2637 self.io.random(&token); 2638 const token_hex = std.fmt.bytesToHex(token, .lower); 2639 const file = try self.dir.createFile(self.io, &token_hex, .{}); 2640 defer file.close(self.io); 2641 try file.writeStreamingAll(self.io, user_id); 2642 return token_hex; 2643 } 2644 2645 fn createFlash(self: SessionStore, allocator: std.mem.Allocator, value: ui.Session.FormFeedback) ![token_hex_len]u8 { 2646 var token: [evt.event_id_size]u8 = undefined; 2647 self.io.random(&token); 2648 const token_hex = std.fmt.bytesToHex(token, .lower); 2649 const file = try self.flash_dir.createFile(self.io, &token_hex, .{}); 2650 errdefer self.flash_dir.deleteFile(self.io, &token_hex) catch {}; 2651 defer file.close(self.io); 2652 2653 var json: std.Io.Writer.Allocating = .init(allocator); 2654 defer json.deinit(); 2655 try std.json.Stringify.value(value, .{}, &json.writer); 2656 try file.writeStreamingAll(self.io, json.written()); 2657 return token_hex; 2658 } 2659 2660 fn takeFlash(self: SessionStore, allocator: std.mem.Allocator, token_hex: []const u8) ?ui.Session.FormFeedback { 2661 if (!isToken(token_hex)) return null; 2662 const file = self.flash_dir.openFile(self.io, token_hex, .{ .mode = .read_only }) catch return null; 2663 defer self.flash_dir.deleteFile(self.io, token_hex) catch {}; 2664 defer file.close(self.io); 2665 2666 var storage: [4096]u8 = undefined; 2667 var reader = file.reader(self.io, &storage); 2668 const bytes = reader.interface.allocRemaining(allocator, .limited(512 * 1024)) catch return null; 2669 return std.json.parseFromSliceLeaky(ui.Session.FormFeedback, allocator, bytes, .{}) catch null; 2670 } 2671 2672 // resolve a cookie's token to its user_id. returns false (logged out) for a 2673 // missing, malformed, or unknown token. 2674 pub fn lookup(self: SessionStore, token_hex: []const u8, out: *[evt.event_id_size]u8) bool { 2675 if (!isToken(token_hex)) return false; 2676 const file = self.dir.openFile(self.io, token_hex, .{ .mode = .read_only }) catch return false; 2677 defer file.close(self.io); 2678 var storage: [evt.event_id_size]u8 = undefined; 2679 var file_reader = file.reader(self.io, &storage); 2680 file_reader.interface.readSliceAll(out) catch return false; 2681 return true; 2682 } 2683 2684 // revoke a session. a no-op for a missing or malformed token. 2685 pub fn remove(self: SessionStore, token_hex: []const u8) void { 2686 if (!isToken(token_hex)) return; 2687 self.dir.deleteFile(self.io, token_hex) catch {}; 2688 } 2689 2690 // leave `token_hex`'s session for visitors arriving without one. only the 2691 // `try` fixture writes one. the name can't collide with a session token. 2692 pub fn offerAutoLogin(self: SessionStore, token_hex: *const [token_hex_len]u8) !void { 2693 const file = try self.dir.createFile(self.io, auto_login_name, .{}); 2694 defer file.close(self.io); 2695 try file.writeStreamingAll(self.io, token_hex); 2696 } 2697 2698 pub fn autoLogin(self: SessionStore, out: *[token_hex_len]u8) bool { 2699 out.* = self.auto_login orelse return false; 2700 return true; 2701 } 2702 2703 const auto_login_name = "auto-login"; 2704 2705 // a token is exactly token_hex_len hex chars. validating before using the 2706 // value as a path keeps attacker-supplied cookies from escaping the 2707 // sessions dir (e.g. via "/" or ".." bytes). 2708 fn isToken(token_hex: []const u8) bool { 2709 if (token_hex.len != token_hex_len) return false; 2710 for (token_hex) |c| if (!std.ascii.isHex(c)) return false; 2711 return true; 2712 } 2713 }; 2714