const std = @import("std");const Allocator = std.mem.Allocator;const ansi = @import("ansi.zig");const tu = @import("text_util.zig");const payload = @import("payload.zig"); pub fn writeInlineNoBold( alloc: Allocator, text: []const u8, out: *std.ArrayList(u8), restore_underline_after_link: bool, footnotes: ?*const payload.FootnoteSink, link_id: *u32,) !void { var stripped: std.ArrayList(u8) = .empty; defer stripped.deinit(alloc); var i: usize = 0; var in_code: bool = false; while (i < text.len) { const c = text[i]; if (c == '`') { in_code = !in_code; try stripped.append(alloc, c); i += 1; continue; } if (!in_code and c == '\\' and i + 1 < text.len and tu.isEscapedPunctuationAt(text, i + 1)) { try stripped.appendSlice(alloc, text[i .. i + 2]); i += 2; continue; } if (!in_code and c == '_' and tu.isValidUnderscoreOpen(text, i, 2)) { if (tu.findUnderscoreCloser(text, i + 2, 2)) |closer| { try stripped.appendSlice(alloc, text[i + 2 .. closer]); i = closer + 2; continue; } } if (!in_code and i + 1 < text.len and c == '*' and text[i + 1] == '*') { i += 2; continue; } try stripped.append(alloc, c); i += 1; } try writeInline(alloc, stripped.items, out, restore_underline_after_link, footnotes, link_id);} pub fn writeInline( alloc: Allocator, text: []const u8, out: *std.ArrayList(u8), restore_underline_after_link: bool, footnotes: ?*const payload.FootnoteSink, link_id: *u32,) !void { var i: usize = 0; var in_bold: bool = false; var in_italic: bool = false; var in_underscore_bold: bool = false; var in_underscore_italic: bool = false; var in_strike: bool = false; var in_code: bool = false; var link_admission_suppressed_until: usize = 0; while (i < text.len) { const c = text[i]; if (c == '`') { if (in_code) { try out.appendSlice(alloc, ansi.inline_code_close); in_code = false; } else { try out.appendSlice(alloc, ansi.inline_code_open); in_code = true; } i += 1; continue; } if (in_code) { try out.append(alloc, c); i += 1; continue; } if (c == '\\' and i + 1 < text.len and tu.isEscapedPunctuationAt(text, i + 1)) { if (text[i + 1] == '<') { link_admission_suppressed_until = @max( link_admission_suppressed_until, angleAutolinkCandidateEnd(text, i + 1), ); } if (text[i + 1] == '!' and i + 2 < text.len and text[i + 2] == '[') { if (malformedInlineLinkCandidateEnd(text, i + 2)) |candidate_end| { try out.appendSlice(alloc, text[i + 1 .. candidate_end]); link_admission_suppressed_until = @max(link_admission_suppressed_until, candidate_end); i = candidate_end; continue; } } if (text[i + 1] == '[') { if (malformedInlineLinkCandidateEnd(text, i + 1)) |candidate_end| { link_admission_suppressed_until = @max(link_admission_suppressed_until, candidate_end); } } try out.append(alloc, text[i + 1]); i += 2; continue; } if (i >= link_admission_suppressed_until and c == '!' and i + 1 < text.len and text[i + 1] == '[') { if (parseInlineImage(text, i)) |image| { try emitInlineLink(alloc, out, image, restore_underline_after_link, "▧ ", link_id); i = image.end; continue; } if (malformedInlineLinkCandidateEnd(text, i + 1)) |candidate_end| { link_admission_suppressed_until = @max(link_admission_suppressed_until, candidate_end); } } if (c == '[') { if (footnotes) |sink| { if (parseFootnoteReference(text, i)) |reference| { const number = try sink.register(sink.ctx, alloc, reference.label); try writeFootnoteMarker(alloc, out, number); i = reference.end; continue; } } } if (i >= link_admission_suppressed_until and c == '[') { if (parseInlineLink(text, i)) |link| { try emitInlineLink(alloc, out, link, restore_underline_after_link, null, link_id); i = link.end; continue; } if (malformedInlineLinkCandidateEnd(text, i)) |candidate_end| { link_admission_suppressed_until = @max(link_admission_suppressed_until, candidate_end); } } if (i >= link_admission_suppressed_until and c == '<') { if (parseAngleAutolink(text, i)) |link| { try emitInlineLink(alloc, out, link, restore_underline_after_link, null, link_id); i = link.end; continue; } link_admission_suppressed_until = @max( link_admission_suppressed_until, angleAutolinkCandidateEnd(text, i), ); } if (i >= link_admission_suppressed_until) { if (parseBareUrl(text, i, in_bold, in_italic, in_underscore_bold, in_underscore_italic, in_strike)) |link| { try emitInlineLink(alloc, out, link, restore_underline_after_link, null, link_id); i = link.end; continue; } } if (c == '~' and i + 1 < text.len and text[i + 1] == '~') { if (in_strike) { if (i == 0 or tu.isSpace(text[i - 1])) { try out.append(alloc, c); i += 1; continue; } try out.appendSlice(alloc, ansi.strike_close); in_strike = false; } else { if (i + 2 >= text.len or tu.isSpace(text[i + 2])) { try out.append(alloc, c); i += 1; continue; } try out.appendSlice(alloc, ansi.strike_open); in_strike = true; } i += 2; continue; } if (c == '*' and i + 1 < text.len and text[i + 1] == '*') { if (in_bold) { if (i == 0 or tu.isSpace(text[i - 1])) { try out.append(alloc, c); i += 1; continue; } try out.appendSlice(alloc, ansi.bold_close); in_bold = false; if (in_underscore_bold) try out.appendSlice(alloc, ansi.bold_open); } else { if (i + 2 >= text.len or tu.isSpace(text[i + 2])) { try out.append(alloc, c); i += 1; continue; } try out.appendSlice(alloc, ansi.bold_open); in_bold = true; } i += 2; continue; } if (c == '_' and i + 1 < text.len and text[i + 1] == '_') { if (in_underscore_bold) { if (!tu.isValidUnderscoreClose(text, i, 2)) { try out.append(alloc, c); i += 1; continue; } try out.appendSlice(alloc, ansi.bold_close); in_underscore_bold = false; if (in_bold) try out.appendSlice(alloc, ansi.bold_open); } else { if (!tu.isValidUnderscoreOpen(text, i, 2)) { try out.append(alloc, c); i += 1; continue; } try out.appendSlice(alloc, ansi.bold_open); in_underscore_bold = true; } i += 2; continue; } if (c == '_') { if (in_underscore_italic) { if (!tu.isValidUnderscoreClose(text, i, 1)) { try out.append(alloc, c); i += 1; continue; } try out.appendSlice(alloc, ansi.italic_close); in_underscore_italic = false; if (in_italic) try out.appendSlice(alloc, ansi.italic_open); } else { if (!tu.isValidUnderscoreOpen(text, i, 1)) { try out.append(alloc, c); i += 1; continue; } try out.appendSlice(alloc, ansi.italic_open); in_underscore_italic = true; } i += 1; continue; } if (c == '*') { if (in_italic) { if (i == 0 or tu.isSpace(text[i - 1])) { try out.append(alloc, c); i += 1; continue; } try out.appendSlice(alloc, ansi.italic_close); in_italic = false; if (in_underscore_italic) try out.appendSlice(alloc, ansi.italic_open); } else { if (i + 1 >= text.len or tu.isSpace(text[i + 1])) { try out.append(alloc, c); i += 1; continue; } try out.appendSlice(alloc, ansi.italic_open); in_italic = true; } i += 1; continue; } try out.append(alloc, c); i += 1; } if (in_bold) try out.appendSlice(alloc, ansi.bold_close); if (in_italic) try out.appendSlice(alloc, ansi.italic_close); if (in_underscore_bold) try out.appendSlice(alloc, ansi.bold_close); if (in_underscore_italic) try out.appendSlice(alloc, ansi.italic_close); if (in_strike) try out.appendSlice(alloc, ansi.strike_close); if (in_code) try out.appendSlice(alloc, ansi.inline_code_close);} const ParsedFootnoteReference = struct { label: []const u8, end: usize,}; fn parseFootnoteReference(text: []const u8, start: usize) ?ParsedFootnoteReference { if (start + 4 > text.len or text[start] != '[' or text[start + 1] != '^') return null; const close = std.mem.indexOfScalarPos(u8, text, start + 2, ']') orelse return null; if (close == start + 2) return null; if (close + 1 < text.len and text[close + 1] == ':') return null; return .{ .label = text[start + 2 .. close], .end = close + 1 };} fn writeFootnoteMarker(alloc: Allocator, out: *std.ArrayList(u8), number: usize) !void { var marker: [32]u8 = undefined; const bytes = try std.fmt.bufPrint(&marker, "[{d}]", .{number}); try ansi.writeDim(alloc, out, bytes);} const InlineLink = struct { text: []const u8, url: []const u8, end: usize, destination_prefix: []const u8 = "", label_mode: enum { escaped, literal } = .escaped,}; fn emitInlineLink( alloc: Allocator, out: *std.ArrayList(u8), link: InlineLink, restore_underline_after_link: bool, visible_prefix: ?[]const u8, link_id: *u32,) !void { const id = link_id.*; link_id.* +%= 1; var id_buf: [32]u8 = undefined; const open = std.fmt.bufPrint(&id_buf, "\x1b]8;id=fx-{d};", .{id}) catch unreachable; try out.appendSlice(alloc, open); try out.appendSlice(alloc, link.destination_prefix); try out.appendSlice(alloc, link.url); try out.appendSlice(alloc, "\x1b\\"); try out.appendSlice(alloc, ansi.underline_open); if (visible_prefix) |prefix| try out.appendSlice(alloc, prefix); const visible_text = if (link.text.len == 0 and visible_prefix != null) "image" else link.text; switch (link.label_mode) { .escaped => try tu.appendEscapedPunctuation(alloc, out, visible_text), .literal => try out.appendSlice(alloc, visible_text), } try out.appendSlice(alloc, ansi.underline_close); try out.appendSlice(alloc, "\x1b]8;;\x1b\\"); if (restore_underline_after_link) try out.appendSlice(alloc, ansi.underline_open);} /// Rejects control bytes so a URL cannot terminate its OSC 8 wrapper.fn parseInlineLink(text: []const u8, start: usize) ?InlineLink { return parseInlineBracketDestination(text, start, false);} fn parseInlineImage(text: []const u8, start: usize) ?InlineLink { if (start + 1 >= text.len or text[start] != '!' or text[start + 1] != '[') return null; return parseInlineBracketDestination(text, start + 1, true);} fn parseInlineBracketDestination(text: []const u8, start: usize, allow_empty_text: bool) ?InlineLink { if (start >= text.len or text[start] != '[') return null; var j = start + 1; while (j < text.len and text[j] != ']' and text[j] != '\n') : (j += 1) {} if (j >= text.len or text[j] != ']') return null; const text_end = j; if (!allow_empty_text and text_end == start + 1) return null; if (text_end + 1 >= text.len or text[text_end + 1] != '(') return null; var k = text_end + 2; while (k < text.len and text[k] != ')' and text[k] != '\n') : (k += 1) {} if (k >= text.len or text[k] != ')') return null; const url = text[text_end + 2 .. k]; if (!isValidLinkUrl(url)) return null; return .{ .text = text[start + 1 .. text_end], .url = url, .end = k + 1, };} fn parseAngleAutolink(text: []const u8, start: usize) ?InlineLink { if (start >= text.len or text[start] != '<') return null; const end = angleAutolinkCandidateEnd(text, start); if (end <= start + 1 or end > text.len or text[end - 1] != '>') return null; const value = text[start + 1 .. end - 1]; if (isValidAngleAutolinkUri(value) and isValidLinkUrl(value)) { return .{ .text = value, .url = value, .end = end, .label_mode = .literal, }; } if (isValidAngleAutolinkEmail(value) and isValidLinkUrlWithPrefix("mailto:", value)) { return .{ .text = value, .url = value, .end = end, .destination_prefix = "mailto:", .label_mode = .literal, }; } return null;} fn angleAutolinkCandidateEnd(text: []const u8, start: usize) usize { if (start >= text.len or text[start] != '<') return start; var end = start + 1; while (end < text.len and text[end] != '>' and text[end] != '\n') : (end += 1) {} return if (end < text.len and text[end] == '>') end + 1 else end;} fn isValidAngleAutolinkUri(value: []const u8) bool { var colon: usize = 0; while (colon < value.len and value[colon] != ':') : (colon += 1) {} if (colon < 2 or colon > 32 or colon == value.len or !tu.isAsciiAlpha(value[0])) return false; for (value[1..colon]) |byte| { if (!tu.isAsciiAlphaNumeric(byte) and byte != '+' and byte != '-' and byte != '.') return false; } for (value[colon + 1 ..]) |byte| { if (byte <= ' ' or byte == '<' or byte == '>') return false; } return true;} fn isValidAngleAutolinkEmail(value: []const u8) bool { var at_index: ?usize = null; for (value, 0..) |byte, index| { if (byte == '@') { if (at_index != null) return false; at_index = index; } } const at = at_index orelse return false; if (at == 0 or at + 1 >= value.len) return false; for (value[0..at]) |byte| if (!isAngleAutolinkEmailLocalByte(byte)) return false; var label_start = at + 1; var index = label_start; while (index <= value.len) : (index += 1) { if (index != value.len and value[index] != '.') continue; if (!isValidAngleAutolinkEmailDomainLabel(value[label_start..index])) return false; label_start = index + 1; } return true;} fn isAngleAutolinkEmailLocalByte(byte: u8) bool { return tu.isAsciiAlphaNumeric(byte) or switch (byte) { '.', '!', '#', '$', '%', '&', '\'', '*', '+', '/', '=', '?', '^', '_', '`', '{', '|', '}', '~', '-' => true, else => false, };} fn isValidAngleAutolinkEmailDomainLabel(label: []const u8) bool { if (label.len == 0 or label.len > 63) return false; for (label, 0..) |byte, index| { if (index == 0 or index + 1 == label.len) { if (!tu.isAsciiAlphaNumeric(byte)) return false; } else if (!tu.isAsciiAlphaNumeric(byte) and byte != '-') { return false; } } return true;} fn parseBareUrl( text: []const u8, start: usize, in_bold: bool, in_italic: bool, in_underscore_bold: bool, in_underscore_italic: bool, in_strike: bool,) ?InlineLink { if (!isBareUrlBoundary(text, start, in_underscore_bold, in_underscore_italic)) return null; const scheme_len: usize = if (std.mem.startsWith(u8, text[start..], "https://")) "https://".len else if (std.mem.startsWith(u8, text[start..], "http://")) "http://".len else return null; var end = start + scheme_len; while (end < text.len and !isBareUrlTerminator(text, end, in_bold, in_italic, in_underscore_bold, in_underscore_italic, in_strike)) : (end += 1) {} while (end > start + scheme_len and tu.isTrailingUrlPunctuation(text[end - 1])) : (end -= 1) {} const url = text[start..end]; if (!isValidLinkUrl(url)) return null; return .{ .text = url, .url = url, .end = end, };} fn malformedInlineLinkCandidateEnd(text: []const u8, start: usize) ?usize { if (start >= text.len or text[start] != '[') return null;Lines 1–500 of 550. 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const std = @import("std"); const Allocator = std.mem.Allocator; const ansi = @import("ansi.zig"); const tu = @import("text_util.zig"); const payload = @import("payload.zig"); pub fn writeInlineNoBold( alloc: Allocator, text: []const u8, out: *std.ArrayList(u8), restore_underline_after_link: bool, footnotes: ?*const payload.FootnoteSink, link_id: *u32, ) !void { var stripped: std.ArrayList(u8) = .empty; defer stripped.deinit(alloc); var i: usize = 0; var in_code: bool = false; while (i < text.len) { const c = text[i]; if (c == '`') { in_code = !in_code; try stripped.append(alloc, c); i += 1; continue; } if (!in_code and c == '\\' and i + 1 < text.len and tu.isEscapedPunctuationAt(text, i + 1)) { try stripped.appendSlice(alloc, text[i .. i + 2]); i += 2; continue; } if (!in_code and c == '_' and tu.isValidUnderscoreOpen(text, i, 2)) { if (tu.findUnderscoreCloser(text, i + 2, 2)) |closer| { try stripped.appendSlice(alloc, text[i + 2 .. closer]); i = closer + 2; continue; } } if (!in_code and i + 1 < text.len and c == '*' and text[i + 1] == '*') { i += 2; continue; } try stripped.append(alloc, c); i += 1; } try writeInline(alloc, stripped.items, out, restore_underline_after_link, footnotes, link_id); } pub fn writeInline( alloc: Allocator, text: []const u8, out: *std.ArrayList(u8), restore_underline_after_link: bool, footnotes: ?*const payload.FootnoteSink, link_id: *u32, ) !void { var i: usize = 0; var in_bold: bool = false; var in_italic: bool = false; var in_underscore_bold: bool = false; var in_underscore_italic: bool = false; var in_strike: bool = false; var in_code: bool = false; var link_admission_suppressed_until: usize = 0; while (i < text.len) { const c = text[i]; if (c == '`') { if (in_code) { try out.appendSlice(alloc, ansi.inline_code_close); in_code = false; } else { try out.appendSlice(alloc, ansi.inline_code_open); in_code = true; } i += 1; continue; } if (in_code) { try out.append(alloc, c); i += 1; continue; } if (c == '\\' and i + 1 < text.len and tu.isEscapedPunctuationAt(text, i + 1)) { if (text[i + 1] == '<') { link_admission_suppressed_until = @max( link_admission_suppressed_until, angleAutolinkCandidateEnd(text, i + 1), ); } if (text[i + 1] == '!' and i + 2 < text.len and text[i + 2] == '[') { if (malformedInlineLinkCandidateEnd(text, i + 2)) |candidate_end| { try out.appendSlice(alloc, text[i + 1 .. candidate_end]); link_admission_suppressed_until = @max(link_admission_suppressed_until, candidate_end); i = candidate_end; continue; } } if (text[i + 1] == '[') { if (malformedInlineLinkCandidateEnd(text, i + 1)) |candidate_end| { link_admission_suppressed_until = @max(link_admission_suppressed_until, candidate_end); } } try out.append(alloc, text[i + 1]); i += 2; continue; } if (i >= link_admission_suppressed_until and c == '!' and i + 1 < text.len and text[i + 1] == '[') { if (parseInlineImage(text, i)) |image| { try emitInlineLink(alloc, out, image, restore_underline_after_link, "▧ ", link_id); i = image.end; continue; } if (malformedInlineLinkCandidateEnd(text, i + 1)) |candidate_end| { link_admission_suppressed_until = @max(link_admission_suppressed_until, candidate_end); } } if (c == '[') { if (footnotes) |sink| { if (parseFootnoteReference(text, i)) |reference| { const number = try sink.register(sink.ctx, alloc, reference.label); try writeFootnoteMarker(alloc, out, number); i = reference.end; continue; } } } if (i >= link_admission_suppressed_until and c == '[') { if (parseInlineLink(text, i)) |link| { try emitInlineLink(alloc, out, link, restore_underline_after_link, null, link_id); i = link.end; continue; } if (malformedInlineLinkCandidateEnd(text, i)) |candidate_end| { link_admission_suppressed_until = @max(link_admission_suppressed_until, candidate_end); } } if (i >= link_admission_suppressed_until and c == '<') { if (parseAngleAutolink(text, i)) |link| { try emitInlineLink(alloc, out, link, restore_underline_after_link, null, link_id); i = link.end; continue; } link_admission_suppressed_until = @max( link_admission_suppressed_until, angleAutolinkCandidateEnd(text, i), ); } if (i >= link_admission_suppressed_until) { if (parseBareUrl(text, i, in_bold, in_italic, in_underscore_bold, in_underscore_italic, in_strike)) |link| { try emitInlineLink(alloc, out, link, restore_underline_after_link, null, link_id); i = link.end; continue; } } if (c == '~' and i + 1 < text.len and text[i + 1] == '~') { if (in_strike) { if (i == 0 or tu.isSpace(text[i - 1])) { try out.append(alloc, c); i += 1; continue; } try out.appendSlice(alloc, ansi.strike_close); in_strike = false; } else { if (i + 2 >= text.len or tu.isSpace(text[i + 2])) { try out.append(alloc, c); i += 1; continue; } try out.appendSlice(alloc, ansi.strike_open); in_strike = true; } i += 2; continue; } if (c == '*' and i + 1 < text.len and text[i + 1] == '*') { if (in_bold) { if (i == 0 or tu.isSpace(text[i - 1])) { try out.append(alloc, c); i += 1; continue; } try out.appendSlice(alloc, ansi.bold_close); in_bold = false; if (in_underscore_bold) try out.appendSlice(alloc, ansi.bold_open); } else { if (i + 2 >= text.len or tu.isSpace(text[i + 2])) { try out.append(alloc, c); i += 1; continue; } try out.appendSlice(alloc, ansi.bold_open); in_bold = true; } i += 2; continue; } if (c == '_' and i + 1 < text.len and text[i + 1] == '_') { if (in_underscore_bold) { if (!tu.isValidUnderscoreClose(text, i, 2)) { try out.append(alloc, c); i += 1; continue; } try out.appendSlice(alloc, ansi.bold_close); in_underscore_bold = false; if (in_bold) try out.appendSlice(alloc, ansi.bold_open); } else { if (!tu.isValidUnderscoreOpen(text, i, 2)) { try out.append(alloc, c); i += 1; continue; } try out.appendSlice(alloc, ansi.bold_open); in_underscore_bold = true; } i += 2; continue; } if (c == '_') { if (in_underscore_italic) { if (!tu.isValidUnderscoreClose(text, i, 1)) { try out.append(alloc, c); i += 1; continue; } try out.appendSlice(alloc, ansi.italic_close); in_underscore_italic = false; if (in_italic) try out.appendSlice(alloc, ansi.italic_open); } else { if (!tu.isValidUnderscoreOpen(text, i, 1)) { try out.append(alloc, c); i += 1; continue; } try out.appendSlice(alloc, ansi.italic_open); in_underscore_italic = true; } i += 1; continue; } if (c == '*') { if (in_italic) { if (i == 0 or tu.isSpace(text[i - 1])) { try out.append(alloc, c); i += 1; continue; } try out.appendSlice(alloc, ansi.italic_close); in_italic = false; if (in_underscore_italic) try out.appendSlice(alloc, ansi.italic_open); } else { if (i + 1 >= text.len or tu.isSpace(text[i + 1])) { try out.append(alloc, c); i += 1; continue; } try out.appendSlice(alloc, ansi.italic_open); in_italic = true; } i += 1; continue; } try out.append(alloc, c); i += 1; } if (in_bold) try out.appendSlice(alloc, ansi.bold_close); if (in_italic) try out.appendSlice(alloc, ansi.italic_close); if (in_underscore_bold) try out.appendSlice(alloc, ansi.bold_close); if (in_underscore_italic) try out.appendSlice(alloc, ansi.italic_close); if (in_strike) try out.appendSlice(alloc, ansi.strike_close); if (in_code) try out.appendSlice(alloc, ansi.inline_code_close); } const ParsedFootnoteReference = struct { label: []const u8, end: usize, }; fn parseFootnoteReference(text: []const u8, start: usize) ?ParsedFootnoteReference { if (start + 4 > text.len or text[start] != '[' or text[start + 1] != '^') return null; const close = std.mem.indexOfScalarPos(u8, text, start + 2, ']') orelse return null; if (close == start + 2) return null; if (close + 1 < text.len and text[close + 1] == ':') return null; return .{ .label = text[start + 2 .. close], .end = close + 1 }; } fn writeFootnoteMarker(alloc: Allocator, out: *std.ArrayList(u8), number: usize) !void { var marker: [32]u8 = undefined; const bytes = try std.fmt.bufPrint(&marker, "[{d}]", .{number}); try ansi.writeDim(alloc, out, bytes); } const InlineLink = struct { text: []const u8, url: []const u8, end: usize, destination_prefix: []const u8 = "", label_mode: enum { escaped, literal } = .escaped, }; fn emitInlineLink( alloc: Allocator, out: *std.ArrayList(u8), link: InlineLink, restore_underline_after_link: bool, visible_prefix: ?[]const u8, link_id: *u32, ) !void { const id = link_id.*; link_id.* +%= 1; var id_buf: [32]u8 = undefined; const open = std.fmt.bufPrint(&id_buf, "\x1b]8;id=fx-{d};", .{id}) catch unreachable; try out.appendSlice(alloc, open); try out.appendSlice(alloc, link.destination_prefix); try out.appendSlice(alloc, link.url); try out.appendSlice(alloc, "\x1b\\"); try out.appendSlice(alloc, ansi.underline_open); if (visible_prefix) |prefix| try out.appendSlice(alloc, prefix); const visible_text = if (link.text.len == 0 and visible_prefix != null) "image" else link.text; switch (link.label_mode) { .escaped => try tu.appendEscapedPunctuation(alloc, out, visible_text), .literal => try out.appendSlice(alloc, visible_text), } try out.appendSlice(alloc, ansi.underline_close); try out.appendSlice(alloc, "\x1b]8;;\x1b\\"); if (restore_underline_after_link) try out.appendSlice(alloc, ansi.underline_open); } /// Rejects control bytes so a URL cannot terminate its OSC 8 wrapper. fn parseInlineLink(text: []const u8, start: usize) ?InlineLink { return parseInlineBracketDestination(text, start, false); } fn parseInlineImage(text: []const u8, start: usize) ?InlineLink { if (start + 1 >= text.len or text[start] != '!' or text[start + 1] != '[') return null; return parseInlineBracketDestination(text, start + 1, true); } fn parseInlineBracketDestination(text: []const u8, start: usize, allow_empty_text: bool) ?InlineLink { if (start >= text.len or text[start] != '[') return null; var j = start + 1; while (j < text.len and text[j] != ']' and text[j] != '\n') : (j += 1) {} if (j >= text.len or text[j] != ']') return null; const text_end = j; if (!allow_empty_text and text_end == start + 1) return null; if (text_end + 1 >= text.len or text[text_end + 1] != '(') return null; var k = text_end + 2; while (k < text.len and text[k] != ')' and text[k] != '\n') : (k += 1) {} if (k >= text.len or text[k] != ')') return null; const url = text[text_end + 2 .. k]; if (!isValidLinkUrl(url)) return null; return .{ .text = text[start + 1 .. text_end], .url = url, .end = k + 1, }; } fn parseAngleAutolink(text: []const u8, start: usize) ?InlineLink { if (start >= text.len or text[start] != '<') return null; const end = angleAutolinkCandidateEnd(text, start); if (end <= start + 1 or end > text.len or text[end - 1] != '>') return null; const value = text[start + 1 .. end - 1]; if (isValidAngleAutolinkUri(value) and isValidLinkUrl(value)) { return .{ .text = value, .url = value, .end = end, .label_mode = .literal, }; } if (isValidAngleAutolinkEmail(value) and isValidLinkUrlWithPrefix("mailto:", value)) { return .{ .text = value, .url = value, .end = end, .destination_prefix = "mailto:", .label_mode = .literal, }; } return null; } fn angleAutolinkCandidateEnd(text: []const u8, start: usize) usize { if (start >= text.len or text[start] != '<') return start; var end = start + 1; while (end < text.len and text[end] != '>' and text[end] != '\n') : (end += 1) {} return if (end < text.len and text[end] == '>') end + 1 else end; } fn isValidAngleAutolinkUri(value: []const u8) bool { var colon: usize = 0; while (colon < value.len and value[colon] != ':') : (colon += 1) {} if (colon < 2 or colon > 32 or colon == value.len or !tu.isAsciiAlpha(value[0])) return false; for (value[1..colon]) |byte| { if (!tu.isAsciiAlphaNumeric(byte) and byte != '+' and byte != '-' and byte != '.') return false; } for (value[colon + 1 ..]) |byte| { if (byte <= ' ' or byte == '<' or byte == '>') return false; } return true; } fn isValidAngleAutolinkEmail(value: []const u8) bool { var at_index: ?usize = null; for (value, 0..) |byte, index| { if (byte == '@') { if (at_index != null) return false; at_index = index; } } const at = at_index orelse return false; if (at == 0 or at + 1 >= value.len) return false; for (value[0..at]) |byte| if (!isAngleAutolinkEmailLocalByte(byte)) return false; var label_start = at + 1; var index = label_start; while (index <= value.len) : (index += 1) { if (index != value.len and value[index] != '.') continue; if (!isValidAngleAutolinkEmailDomainLabel(value[label_start..index])) return false; label_start = index + 1; } return true; } fn isAngleAutolinkEmailLocalByte(byte: u8) bool { return tu.isAsciiAlphaNumeric(byte) or switch (byte) { '.', '!', '#', '$', '%', '&', '\'', '*', '+', '/', '=', '?', '^', '_', '`', '{', '|', '}', '~', '-' => true, else => false, }; } fn isValidAngleAutolinkEmailDomainLabel(label: []const u8) bool { if (label.len == 0 or label.len > 63) return false; for (label, 0..) |byte, index| { if (index == 0 or index + 1 == label.len) { if (!tu.isAsciiAlphaNumeric(byte)) return false; } else if (!tu.isAsciiAlphaNumeric(byte) and byte != '-') { return false; } } return true; } fn parseBareUrl( text: []const u8, start: usize, in_bold: bool, in_italic: bool, in_underscore_bold: bool, in_underscore_italic: bool, in_strike: bool, ) ?InlineLink { if (!isBareUrlBoundary(text, start, in_underscore_bold, in_underscore_italic)) return null; const scheme_len: usize = if (std.mem.startsWith(u8, text[start..], "https://")) "https://".len else if (std.mem.startsWith(u8, text[start..], "http://")) "http://".len else return null; var end = start + scheme_len; while (end < text.len and !isBareUrlTerminator(text, end, in_bold, in_italic, in_underscore_bold, in_underscore_italic, in_strike)) : (end += 1) {} while (end > start + scheme_len and tu.isTrailingUrlPunctuation(text[end - 1])) : (end -= 1) {} const url = text[start..end]; if (!isValidLinkUrl(url)) return null; return .{ .text = url, .url = url, .end = end, }; } fn malformedInlineLinkCandidateEnd(text: []const u8, start: usize) ?usize { if (start >= text.len or text[start] != '[') return null;