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January 14, 2026 20:43
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Claude Code session: citation-style reference link support
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| ▐▛███▜▌ Claude Code v2.1.7 | |
| ▝▜█████▛▘ Opus 4.5 · Claude Pro | |
| ▘▘ ▝▝ ~/code/mdriver/better-support-endnotes | |
| ❯ How could we support collapsed reference links better? I've included the | |
| gh cli's readme.md in cli.md, which uses them. Unfortunately it leads to | |
| a bunch of empty links at the top and a mess of a footnote at the end | |
| ⏺ I'll explore the codebase to understand how links are currently handled and look at the cli.md file to see the specific issue with collapsed reference links. | |
| ⏺ Explore(Explore link handling in codebase) | |
| ⎿ Done (31 tool uses · 66.5k tokens · 3m 54s) | |
| ⏺ Read(cli.md) | |
| ⎿ Read 134 lines | |
| ⏺ Now I understand the problem. The cli.md file uses collapsed reference links like [Homebrew][], [MacPorts][], etc. on lines 24 and 64, with the link reference definitions at the end (lines 120-133). | |
| The fundamental challenge is that streaming parsers emit content as it's processed, but reference link definitions appear at the end of the document. Let me look at how link definitions are currently being handled and the GFM spec. | |
| ⏺ Search(pattern: "link.*definition|reference.*link|LinkDefinition", path: | |
| "src", output_mode: "content") | |
| ⎿ Found 0 lines | |
| ⏺ Read(gfmspec.md) | |
| ⎿ Read 100 lines | |
| ⏺ Let me find the relevant sections of the GFM spec on link reference definitions and reference-style links. | |
| ⏺ Search(pattern: "^## .*4\.7.*Link reference|^## .*6\.6.*Links", path: | |
| "gfmspec.md", output_mode: "content") | |
| ⎿ Found 2 lines (ctrl+o to expand) | |
| ⏺ Read(gfmspec.md) | |
| ⎿ Read 150 lines | |
| ⏺ Read(gfmspec.md) | |
| ⎿ Read 200 lines | |
| ⏺ Read(gfmspec.md) | |
| ⎿ Read 200 lines | |
| ⏺ Search(pattern: "reference link|collapsed reference|shortcut reference|full | |
| reference", path: "gfmspec.md", output_mode: "content", head_limit: 30) | |
| ⎿ Found 24 lines (ctrl+o to expand) | |
| ⏺ Read(gfmspec.md) | |
| ⎿ Read 150 lines | |
| ⏺ Read(gfmspec.md) | |
| ⎿ Read 100 lines | |
| ⏺ Now I have a clear picture of the problem. Let me summarize what I've found and ask you about your preferred approach. | |
| The Problem | |
| Reference links in GFM have three forms: | |
| - Full: [link text][reference] | |
| - Collapsed: [reference][] | |
| - Shortcut: [reference] | |
| All three require link definitions (like [reference]: https://url) that can appear anywhere in the document - typically at the end, as in cli.md. | |
| This is fundamentally incompatible with streaming because: | |
| 1. When the parser sees [Homebrew][] on line 24, it can't resolve it yet | |
| 2. The definition [Homebrew]: https://brew.sh isn't seen until line 121 | |
| 3. By then, the paragraph containing the link has already been emitted | |
| Currently there's no support for reference links in the codebase - unresolved references are likely being rendered as plain text or empty links, and the definitions at the end are being rendered as a paragraph. | |
| ⏺ User answered Claude's questions: | |
| ⎿ · How would you like to handle the streaming vs. reference link | |
| trade-off? → Citation-style output | |
| ⏺ Citation-style output is a good choice for streaming compatibility. Let me design this implementation. | |
| ⏺ Plan(Design citation-style reference links) | |
| ⎿ Done (15 tool uses · 79.6k tokens · 2m 4s) | |
| ⏺ I have a comprehensive implementation plan. Let me write it to the plan file. | |
| ⏺ Updated plan | |
| ⎿ Wrote 87 lines to ../../../.claude/plans/witty-drifting-wolf.md | |
| # Plan: Citation-Style Reference Link Support | |
| ## Problem | |
| Reference links (`[text][ref]`, `[ref][]`, `[ref]`) require | |
| definitions that typically appear at the end of documents. This is | |
| incompatible with streaming parsers that emit blocks incrementally. | |
| ## Chosen Solution: Citation-Style Output | |
| - When encountering an unresolved reference, render as `text[n]` | |
| - Emit a "References:" section at `flush()` with numbered entries | |
| - If definition is known before the link, render as normal OSC8 | |
| hyperlink | |
| … +77 lines (ctrl+o to expand) | |
| ⏺ I've created a plan for citation-style reference link support. The key points: | |
| 1. When definition is known before the link: Render as normal clickable hyperlink | |
| 2. When definition comes after (the streaming challenge): Render as text[n] citation, emit bibliography at end | |
| 3. Bibliography section: Clean formatted section with numbered references and clickable URLs | |
| This handles the cli.md problem by: | |
| - Not emitting link definitions as paragraph text (they're stored silently) | |
| - Converting forward-referenced links to citations with a clean bibliography at the end | |
| ⏺ User approved Claude's plan | |
| ⎿ Plan saved to: ~/.claude/plans/witty-drifting-wolf.md · /plan to edit | |
| Plan: Citation-Style Reference Link Support | |
| Problem | |
| Reference links ([text][ref], [ref][], [ref]) require definitions that | |
| typically appear at the end of documents. This is incompatible with | |
| streaming parsers that emit blocks incrementally. | |
| Chosen Solution: Citation-Style Output | |
| - When encountering an unresolved reference, render as text[n] | |
| - Emit a "References:" section at flush() with numbered entries | |
| - If definition is known before the link, render as normal OSC8 | |
| hyperlink | |
| Example Output | |
| `gh` is available via Homebrew[1], MacPorts[2], and Conda[3]. | |
| ─── References ─── | |
| [1] Homebrew: https://brew.sh | |
| [2] MacPorts: https://www.macports.org | |
| [3] Conda: https://docs.conda.io/en/latest/ | |
| Implementation Steps | |
| 1. Add Data Structures to StreamingParser (src/lib.rs:89) | |
| link_definitions: HashMap<String, (String, Option<String>)>, // label | |
| -> (url, title) | |
| pending_citations: RefCell<Vec<(usize, String, String)>>, // (num, | |
| label, text) | |
| next_citation_number: RefCell<usize>, | |
| 2. Add Label Normalization Method | |
| Case-insensitive, whitespace-collapsed matching per GFM spec section | |
| 4.7. | |
| 3. Add Link Definition Parsing | |
| - New method parse_link_definition() to parse [label]: url "title" | |
| - Integrate in handle_ready_state() before paragraph fallback | |
| - Definitions do NOT emit any output - they're stored silently | |
| 4. Add Reference Link Parsing | |
| - New method parse_reference_link() to detect all three forms: | |
| - Full: [text][label] | |
| - Collapsed: [label][] | |
| - Shortcut: [label] | |
| - Called from format_inline() after inline link check fails | |
| 5. Add Reference Link Rendering | |
| - If definition known: render as OSC8 hyperlink (existing style) | |
| - If definition unknown: render as text[n], store citation for | |
| bibliography | |
| 6. Add Bibliography Formatting at flush() | |
| - Header: "─── References ───" | |
| - Each citation: [n] label: URL with OSC8 hyperlink | |
| - Unresolved: [n] label: (unresolved) in red | |
| 7. Update Constructors | |
| Initialize new fields in new(), with_theme(), with_width(). | |
| Files to Modify | |
| - src/lib.rs - All parsing and rendering logic | |
| - tests/conformance.rs - Handle expected flush output in tests | |
| - tests/common/fixture_loader.rs - Add optional flush_emit field | |
| Test Cases to Add (tests/fixtures/reference_links/) | |
| 1. reference_link_full.toml - Definition before usage | |
| 2. reference_link_collapsed.toml - [label][] syntax | |
| 3. reference_link_shortcut.toml - [label] syntax | |
| 4. reference_link_citation.toml - Definition after usage (citation | |
| style) | |
| 5. reference_link_case_insensitive.toml - Case-insensitive matching | |
| 6. reference_link_unresolved.toml - Missing definition handling | |
| Key Implementation Details | |
| Mutability Challenge | |
| format_inline takes &self but needs to mutate citation state. Use | |
| RefCell for interior mutability of citation tracking. | |
| GFM Compliance | |
| - First definition wins for duplicate labels | |
| - Labels matched case-insensitively with whitespace normalization | |
| - Definitions can have optional titles in quotes or parentheses | |
| Verification | |
| 1. Run cargo test - all existing tests should pass | |
| 2. Run new reference link tests | |
| 3. Test with cli.md file to verify no empty links or definition mess | |
| 4. Run cargo clippy --all-targets --all-features -- -D warnings | |
| 5. Run cargo fmt | |
| ⏺ Let me set up the todo list and start implementing. | |
| ⏺ Read(src/lib.rs) | |
| ⎿ Read 160 lines | |
| ⏺ Read(src/lib.rs) | |
| ⎿ Read 50 lines | |
| ⏺ Now I'll add the data structures. First, let me add the RefCell import and the new fields to StreamingParser. | |
| ⏺ Update(src/lib.rs) | |
| ⎿ Added 1 line | |
| 1 + use std::cell::RefCell; | |
| 2 use std::collections::HashMap; | |
| 3 use std::sync::LazyLock; | |
| 4 | |
| ⏺ Now add the new struct for reference link data after the existing LinkData struct. | |
| ⏺ Update(src/lib.rs) | |
| ⎿ Added 10 lines | |
| 155 end_pos: usize, | |
| 156 } | |
| 157 | |
| 158 + /// Result from parsing a reference-style link | |
| 159 + struct ReferenceLinkData { | |
| 160 + /// The link text (what to display) | |
| 161 + text: String, | |
| 162 + /// The reference label (for lookup, not necessarily | |
| +same as text) | |
| 163 + label: String, | |
| 164 + /// Position after the link syntax | |
| 165 + end_pos: usize, | |
| 166 + } | |
| 167 + | |
| 168 /// Result from parsing an HTML tag | |
| 169 struct HtmlTagResult { | |
| 170 formatted: String, | |
| ⏺ Now add the new fields to StreamingParser. | |
| ⏺ Update(src/lib.rs) | |
| ⎿ Added 6 lines | |
| 98 width: usize, | |
| 99 /// Cache for prefetched image data (URL -> image bytes) | |
| 100 image_cache: HashMap<String, Vec<u8>>, | |
| 101 + /// Link reference definitions: normalized_label -> | |
| +(url, optional_title) | |
| 102 + link_definitions: HashMap<String, (String, | |
| +Option<String>)>, | |
| 103 + /// Pending citations for bibliography: | |
| +(citation_number, label, display_text) | |
| 104 + pending_citations: RefCell<Vec<(usize, String, | |
| +String)>>, | |
| 105 + /// Next citation number to assign | |
| 106 + next_citation_number: RefCell<usize>, | |
| 107 } | |
| 108 | |
| 109 /// Calculate the default output width: min(terminal_width, | |
| 80) | |
| ⏺ Now let me update the constructors to initialize the new fields. | |
| ⏺ Read(src/lib.rs) | |
| ⎿ Read 40 lines | |
| ⏺ Update(src/lib.rs) | |
| ⎿ Added 6 lines | |
| 194 image_protocol, | |
| 195 width: default_width(), | |
| 196 image_cache: HashMap::new(), | |
| 197 + link_definitions: HashMap::new(), | |
| 198 + pending_citations: RefCell::new(Vec::new()), | |
| 199 + next_citation_number: RefCell::new(1), | |
| 200 } | |
| 201 } | |
| 202 | |
| ... | |
| 209 image_protocol, | |
| 210 width, | |
| 211 image_cache: HashMap::new(), | |
| 212 + link_definitions: HashMap::new(), | |
| 213 + pending_citations: RefCell::new(Vec::new()), | |
| 214 + next_citation_number: RefCell::new(1), | |
| 215 } | |
| 216 } | |
| 217 | |
| ⏺ Now let me find the right place to add the helper methods. Let me look at handle_ready_state. | |
| ⏺ Search(pattern: "fn handle_ready_state", path: "src/lib.rs", output_mode: | |
| "content") | |
| ⎿ Found 1 line (ctrl+o to expand) | |
| ⏺ Read(src/lib.rs) | |
| ⎿ Read 100 lines | |
| ⏺ Search(pattern: "fn parse_atx_heading", path: "src/lib.rs", output_mode: | |
| "content") | |
| ⎿ Found 1 line (ctrl+o to expand) | |
| ⏺ Read(src/lib.rs) | |
| ⎿ Read 100 lines | |
| ⏺ Let me find a good location to add the new methods. I'll add them after parse_code_fence. | |
| ⏺ Read(src/lib.rs) | |
| ⎿ Read 60 lines | |
| ⏺ Update(src/lib.rs) | |
| ⎿ Added 106 lines | |
| 819 } | |
| 820 } | |
| 821 | |
| 822 + /// Normalize a link label for matching per GFM spec: | |
| 823 + /// - Strip leading/trailing whitespace | |
| 824 + /// - Collapse internal whitespace to single space | |
| 825 + /// - Unicode case fold (lowercase for ASCII) | |
| 826 + fn normalize_link_label(&self, label: &str) -> String { | |
| 827 + label | |
| 828 + .split_whitespace() | |
| 829 + .collect::<Vec<_>>() | |
| 830 + .join(" ") | |
| 831 + .to_lowercase() | |
| 832 + } | |
| 833 + | |
| 834 + /// Try to parse a link reference definition from a | |
| +line. | |
| 835 + /// Returns Some((label, url, optional_title)) if | |
| +successful. | |
| 836 + /// Link definition format: [label]: url "optional | |
| +title" | |
| 837 + fn parse_link_definition(&self, line: &str) -> | |
| +Option<(String, String, Option<String>)> { | |
| 838 + let trimmed = line.trim_end_matches('\n'); | |
| 839 + | |
| 840 + // Check indentation (0-3 spaces allowed) | |
| 841 + let leading_spaces = trimmed.len() - | |
| +trimmed.trim_start().len(); | |
| 842 + if leading_spaces > 3 { | |
| 843 + return None; | |
| 844 + } | |
| 845 + | |
| 846 + let trimmed = trimmed.trim_start(); | |
| 847 + | |
| 848 + // Must start with [ | |
| 849 + if !trimmed.starts_with('[') { | |
| 850 + return None; | |
| 851 + } | |
| 852 + | |
| 853 + // Find the closing ] for the label - handle escaped | |
| + brackets | |
| 854 + let mut label_end = None; | |
| 855 + let mut in_escape = false; | |
| 856 + for (i, ch) in trimmed[1..].char_indices() { | |
| 857 + if in_escape { | |
| 858 + in_escape = false; | |
| 859 + continue; | |
| 860 + } | |
| 861 + if ch == '\\' { | |
| 862 + in_escape = true; | |
| 863 + continue; | |
| 864 + } | |
| 865 + if ch == ']' { | |
| 866 + label_end = Some(i); | |
| 867 + break; | |
| 868 + } | |
| 869 + } | |
| 870 + | |
| 871 + let label_end = label_end?; | |
| 872 + let label = &trimmed[1..label_end + 1]; | |
| 873 + | |
| 874 + // Label must have at least one non-whitespace | |
| +character | |
| 875 + if label.trim().is_empty() { | |
| 876 + return None; | |
| 877 + } | |
| 878 + | |
| 879 + // Must be followed by : | |
| 880 + let after_label = &trimmed[label_end + 2..]; | |
| 881 + if !after_label.starts_with(':') { | |
| 882 + return None; | |
| 883 + } | |
| 884 + | |
| 885 + // Parse URL (after : and optional whitespace) | |
| 886 + let url_part = after_label[1..].trim_start(); | |
| 887 + | |
| 888 + // Empty URL part means this isn't a valid | |
| +definition | |
| 889 + if url_part.is_empty() { | |
| 890 + return None; | |
| 891 + } | |
| 892 + | |
| 893 + // URL can be: | |
| 894 + // 1. Angle-bracketed URL: <url> | |
| 895 + // 2. Bare URL (no spaces, ends at whitespace or end | |
| + of line) | |
| 896 + let (url, remaining) = if url_part.starts_with('<') | |
| +{ | |
| 897 + // Angle-bracketed URL | |
| 898 + if let Some(end) = url_part[1..].find('>') { | |
| 899 + (&url_part[1..end + 1], &url_part[end + | |
| +2..]) | |
| 900 + } else { | |
| 901 + return None; // Unclosed angle bracket | |
| 902 + } | |
| 903 + } else { | |
| 904 + // Bare URL - take until whitespace | |
| 905 + let end = url_part | |
| 906 + .find(char::is_whitespace) | |
| 907 + .unwrap_or(url_part.len()); | |
| 908 + (&url_part[..end], &url_part[end..]) | |
| 909 + }; | |
| 910 + | |
| 911 + // Parse optional title | |
| 912 + let remaining = remaining.trim_start(); | |
| 913 + let title = if remaining.is_empty() { | |
| 914 + None | |
| 915 + } else if remaining.starts_with('"') { | |
| 916 + remaining[1..].find('"').map(|end| | |
| +remaining[1..end + 1].to_string()) | |
| 917 + } else if remaining.starts_with('\'') { | |
| 918 + remaining[1..].find('\'').map(|end| | |
| +remaining[1..end + 1].to_string()) | |
| 919 + } else if remaining.starts_with('(') { | |
| 920 + remaining[1..].find(')').map(|end| | |
| +remaining[1..end + 1].to_string()) | |
| 921 + } else { | |
| 922 + None | |
| 923 + }; | |
| 924 + | |
| 925 + Some((label.to_string(), url.to_string(), title)) | |
| 926 + } | |
| 927 + | |
| 928 fn parse_list_item(&self, line: &str) -> Option<(usize, | |
| ListItemType)> { | |
| 929 // GFM: 0-3 spaces for top-level, but nested lists | |
| can have more indentation | |
| 930 // For simplicity, we allow up to 12 spaces (3 | |
| levels of nesting at 4 spaces each) | |
| ⏺ Now let me integrate the link definition check into handle_ready_state. I'll add it before the paragraph fallback. | |
| ⏺ Read(src/lib.rs) | |
| ⎿ Read 30 lines | |
| ⏺ Update(src/lib.rs) | |
| ⎿ Added 11 lines | |
| 438 return None; | |
| 439 } | |
| 440 | |
| 441 + // Check for link reference definition [label]: url | |
| +"title" | |
| 442 + // These are stored but never emit content | |
| 443 + if let Some((label, url, title)) = | |
| +self.parse_link_definition(trimmed) { | |
| 444 + let normalized_label = | |
| +self.normalize_link_label(&label); | |
| 445 + // First definition wins (don't overwrite) | |
| 446 + self.link_definitions | |
| 447 + .entry(normalized_label) | |
| 448 + .or_insert((url, title)); | |
| 449 + return None; | |
| 450 + } | |
| 451 + | |
| 452 // Otherwise, start a paragraph | |
| 453 self.state = ParserState::InParagraph; | |
| 454 self.current_block = BlockBuilder::Paragraph { | |
| ⏺ Search(pattern: "fn format_inline", path: "src/lib.rs", output_mode: | |
| "content") | |
| ⎿ Found 1 line (ctrl+o to expand) | |
| ⏺ Read(src/lib.rs) | |
| ⎿ Read 150 lines | |
| ⏺ Search(pattern: "fn parse_link\(", path: "src/lib.rs", output_mode: "content") | |
| ⎿ Found 1 line (ctrl+o to expand) | |
| ⏺ Read(src/lib.rs) | |
| ⎿ Read 70 lines | |
| ⏺ Search(pattern: "fn find_closing", path: "src/lib.rs", output_mode: "content") | |
| ⎿ Found 1 line (ctrl+o to expand) | |
| ⏺ Read(src/lib.rs) | |
| ⎿ Read 50 lines | |
| ⏺ Now let me add the reference link parsing and rendering methods after parse_link. | |
| ⏺ Update(src/lib.rs) | |
| ⎿ Added 89 lines | |
| 2007 }) | |
| 2008 } | |
| 2009 | |
| 2010 + /// Parse a reference-style link: [text][label], | |
| +[label][], or [label] | |
| 2011 + fn parse_reference_link(&self, chars: &[char], start: | |
| +usize) -> Option<ReferenceLinkData> { | |
| 2012 + // Looking for [text][label], [label][], or [label] | |
| 2013 + // start points to '[' | |
| 2014 + | |
| 2015 + // Find the first closing ] | |
| 2016 + let text_end = self.find_closing("]", chars, start | |
| ++ 1)?; | |
| 2017 + let text: String = chars[start + | |
| +1..text_end].iter().collect(); | |
| 2018 + | |
| 2019 + // Empty text is not a valid reference link | |
| 2020 + if text.trim().is_empty() { | |
| 2021 + return None; | |
| 2022 + } | |
| 2023 + | |
| 2024 + // Check what follows the first ] | |
| 2025 + let after_bracket = text_end + 1; | |
| 2026 + | |
| 2027 + if after_bracket < chars.len() && | |
| +chars[after_bracket] == '[' { | |
| 2028 + // Could be [text][label] or [label][] | |
| 2029 + let label_end = self.find_closing("]", chars, | |
| +after_bracket + 1)?; | |
| 2030 + let label: String = chars[after_bracket + | |
| +1..label_end].iter().collect(); | |
| 2031 + | |
| 2032 + if label.is_empty() { | |
| 2033 + // Collapsed reference: [label][] | |
| 2034 + return Some(ReferenceLinkData { | |
| 2035 + text: text.clone(), | |
| 2036 + label: text, | |
| 2037 + end_pos: label_end + 1, | |
| 2038 + }); | |
| 2039 + } else { | |
| 2040 + // Full reference: [text][label] | |
| 2041 + return Some(ReferenceLinkData { | |
| 2042 + text, | |
| 2043 + label, | |
| 2044 + end_pos: label_end + 1, | |
| 2045 + }); | |
| 2046 + } | |
| 2047 + } | |
| 2048 + | |
| 2049 + // Check if this is a shortcut reference [label] | |
| 2050 + // Must not be followed by [ or ( immediately | |
| 2051 + let is_shortcut = after_bracket >= chars.len() | |
| 2052 + || (chars[after_bracket] != '[' && | |
| +chars[after_bracket] != '('); | |
| 2053 + | |
| 2054 + if is_shortcut { | |
| 2055 + return Some(ReferenceLinkData { | |
| 2056 + text: text.clone(), | |
| 2057 + label: text, | |
| 2058 + end_pos: text_end + 1, | |
| 2059 + }); | |
| 2060 + } | |
| 2061 + | |
| 2062 + None | |
| 2063 + } | |
| 2064 + | |
| 2065 + /// Render a reference link, either as a resolved | |
| +hyperlink or as a citation | |
| 2066 + fn render_reference_link(&self, ref_link: | |
| +&ReferenceLinkData) -> String { | |
| 2067 + let normalized_label = | |
| +self.normalize_link_label(&ref_link.label); | |
| 2068 + | |
| 2069 + // Check if we have a definition for this label | |
| 2070 + if let Some((url, _title)) = | |
| +self.link_definitions.get(&normalized_label) { | |
| 2071 + // Definition found - render as normal OSC8 | |
| +hyperlink | |
| 2072 + let formatted_text = | |
| +self.format_inline(&ref_link.text); | |
| 2073 + format!( | |
| 2074 + "\u{001b}]8;;{}\u{001b}\\\u{001b}[34;4m{}\u | |
| +{001b}[0m\u{001b}]8;;\u{001b}\\", | |
| 2075 + url, formatted_text | |
| 2076 + ) | |
| 2077 + } else { | |
| 2078 + // No definition (yet) - use citation style | |
| 2079 + let citation_num = { | |
| 2080 + let mut num = | |
| +self.next_citation_number.borrow_mut(); | |
| 2081 + let current = *num; | |
| 2082 + *num += 1; | |
| 2083 + current | |
| 2084 + }; | |
| 2085 + | |
| 2086 + // Store for bibliography | |
| 2087 + self.pending_citations.borrow_mut().push(( | |
| 2088 + citation_num, | |
| 2089 + ref_link.label.clone(), | |
| 2090 + ref_link.text.clone(), | |
| 2091 + )); | |
| 2092 + | |
| 2093 + // Render as text[n] | |
| 2094 + let formatted_text = | |
| +self.format_inline(&ref_link.text); | |
| 2095 + format!("{}[{}]", formatted_text, citation_num) | |
| 2096 + } | |
| 2097 + } | |
| 2098 + | |
| 2099 /// Parse an HTML tag and return formatted output | |
| 2100 /// Handles: em, i, strong, b, u, s, strike, del, code, | |
| a, pre | |
| 2101 /// Unknown tags are stripped but inner content is | |
| preserved | |
| ⏺ Now let me integrate reference link parsing into format_inline. I need to add the check after the inline link fails. | |
| ⏺ Update(src/lib.rs) | |
| ⎿ Added 9 lines, removed 1 line | |
| 1723 } | |
| 1724 } | |
| 1725 | |
| 1726 - // Check for [text](url) hyperlinks | |
| 1726 + // Check for [text](url) hyperlinks | |
| + or [text][ref]/[ref][]/[ref] reference links | |
| 1727 if chars[i] == '[' { | |
| 1728 + // First try inline link [text](url) | |
| 1729 if let Some(link) = self.parse_link(&chars, | |
| i) { | |
| 1730 // Process link text through | |
| format_inline to handle images, formatting, etc. | |
| 1731 let formatted_text = | |
| self.format_inline(&link.text); | |
| ... | |
| 1740 i = link.end_pos; | |
| 1741 continue; | |
| 1742 } | |
| 1743 + | |
| 1744 + // Then try reference link [text][label], | |
| +[label][], or [label] | |
| 1745 + if let Some(ref_link) = | |
| +self.parse_reference_link(&chars, i) { | |
| 1746 + | |
| +result.push_str(&self.render_reference_link(&ref_link)); | |
| 1747 + i = ref_link.end_pos; | |
| 1748 + continue; | |
| 1749 + } | |
| 1750 } | |
| 1751 | |
| 1752 // Check for ~~strikethrough~~ | |
| ⏺ Search(pattern: "pub fn flush", path: "src/lib.rs", output_mode: "content") | |
| ⎿ Found 1 line (ctrl+o to expand) | |
| ⏺ Read(src/lib.rs) | |
| ⎿ Read 40 lines | |
| ⏺ Update(src/lib.rs) | |
| ⎿ Added 45 lines | |
| 368 output.push_str(&emission); | |
| 369 } | |
| 370 | |
| 371 + // Emit bibliography if there are pending citations | |
| 372 + if let Some(bibliography) = | |
| +self.format_bibliography() { | |
| 373 + output.push_str(&bibliography); | |
| 374 + } | |
| 375 + | |
| 376 output | |
| 377 } | |
| 378 | |
| 379 + /// Format the bibliography section with pending | |
| +citations | |
| 380 + fn format_bibliography(&self) -> Option<String> { | |
| 381 + let citations = self.pending_citations.borrow(); | |
| 382 + if citations.is_empty() { | |
| 383 + return None; | |
| 384 + } | |
| 385 + | |
| 386 + let mut output = String::new(); | |
| 387 + | |
| 388 + // Header with a horizontal rule and title | |
| 389 + output.push_str("\n\u{001b}[1;34m─── References | |
| +───\u{001b}[0m\n\n"); | |
| 390 + | |
| 391 + for (num, label, _text) in citations.iter() { | |
| 392 + let normalized_label = | |
| +self.normalize_link_label(label); | |
| 393 + | |
| 394 + // Check if we now have a definition | |
| 395 + if let Some((url, title)) = | |
| +self.link_definitions.get(&normalized_label) { | |
| 396 + // Render as OSC8 hyperlink | |
| 397 + output.push_str(&format!( | |
| 398 + "[{}] {}: \u{001b}]8;;{}\u{001b}\\\u{001 | |
| +b}[34;4m{}\u{001b}[0m\u{001b}]8;;\u{001b}\\", | |
| 399 + num, label, url, url | |
| 400 + )); | |
| 401 + | |
| 402 + if let Some(t) = title { | |
| 403 + output.push_str(&format!(" \"{}\"", t)); | |
| 404 + } | |
| 405 + } else { | |
| 406 + // No definition found - mark as unresolved | |
| 407 + output.push_str(&format!( | |
| 408 + "[{}] {}: | |
| +\u{001b}[31m(unresolved)\u{001b}[0m", | |
| 409 + num, label | |
| 410 + )); | |
| 411 + } | |
| 412 + output.push('\n'); | |
| 413 + } | |
| 414 + | |
| 415 + output.push('\n'); | |
| 416 + Some(output) | |
| 417 + } | |
| 418 + | |
| 419 fn process_line(&mut self, line: &str) -> Option<String> | |
| { | |
| 420 match &self.state { | |
| 421 ParserState::Ready => | |
| self.handle_ready_state(line), | |
| ⏺ Let me run a quick build to check for compilation errors. | |
| ⏺ Bash(cargo build 2>&1) | |
| ⎿ Updating crates.io index | |
| Locking 202 packages to latest compatible versions | |
| Adding toml v0.8.23 (available: v0.9.11+spec-1.1.0) | |
| … +164 lines (ctrl+o to expand) | |
| ⏺ The build succeeded. Now let me run the tests. | |
| ⏺ Bash(cargo test 2>&1 | head -100) | |
| ⎿ Compiling serde v1.0.228 | |
| Compiling toml_write v0.1.2 | |
| Compiling winnow v0.7.14 | |
| … +106 lines (ctrl+o to expand) | |
| ⏺ Bash(cargo test 2>&1 | tail -50) | |
| ⎿ test html_tags::test_nested_tags ... ok | |
| test html_tags::test_s_tag ... ok | |
| test html_tags::test_self_closing_br ... ok | |
| … +49 lines (ctrl+o to expand) | |
| ⏺ All tests pass. Let me run clippy to check for linting issues. | |
| ⏺ Bash(cargo clippy --all-targets --all-features -- -D warnings 2>&1) | |
| ⎿ Error: Exit code 101 | |
| Checking stable_deref_trait v1.2.1 | |
| Checking cfg-if v1.0.4 | |
| Checking memchr v2.7.6 | |
| Checking simd-adler32 v0.3.8 | |
| Checking crossbeam-utils v0.8.21 | |
| Checking serde_core v1.0.228 | |
| Checking num-traits v0.2.19 | |
| Checking libc v0.2.180 | |
| Checking adler2 v2.0.1 | |
| … +208 lines (ctrl+o to see all) | |
| ⏺ I need to fix some clippy warnings about using strip_prefix instead of manual prefix stripping. Let me fix those. | |
| ⏺ Read(src/lib.rs) | |
| ⎿ Read 45 lines | |
| ⏺ Update(src/lib.rs) | |
| ⎿ Added 9 lines, removed 9 lines | |
| 949 // URL can be: | |
| 950 // 1. Angle-bracketed URL: <url> | |
| 951 // 2. Bare URL (no spaces, ends at whitespace or end | |
| of line) | |
| 952 - let (url, remaining) = if url_part.starts_with('<') { | |
| 952 + let (url, remaining) = if let Some(stripped) = | |
| +url_part.strip_prefix('<') { | |
| 953 // Angle-bracketed URL | |
| 954 - if let Some(end) = url_part[1..].find('>') { | |
| 955 - (&url_part[1..end + 1], &url_part[end + 2..]) | |
| 954 + if let Some(end) = stripped.find('>') { | |
| 955 + (&stripped[..end], &stripped[end + 1..]) | |
| 956 } else { | |
| 957 return None; // Unclosed angle bracket | |
| 958 } | |
| ... | |
| 968 let remaining = remaining.trim_start(); | |
| 969 let title = if remaining.is_empty() { | |
| 970 None | |
| 971 - } else if remaining.starts_with('"') { | |
| 972 - remaining[1..].find('"').map(|end| remaining[1 | |
| -..end + 1].to_string()) | |
| 973 - } else if remaining.starts_with('\'') { | |
| 974 - remaining[1..].find('\'').map(|end| remaining[1 | |
| -..end + 1].to_string()) | |
| 975 - } else if remaining.starts_with('(') { | |
| 976 - remaining[1..].find(')').map(|end| remaining[1 | |
| -..end + 1].to_string()) | |
| 971 + } else if let Some(stripped) = remaining.strip_prefix | |
| +('"') { | |
| 972 + stripped.find('"').map(|end| stripped[..end | |
| +].to_string()) | |
| 973 + } else if let Some(stripped) = remaining.strip_prefix | |
| +('\'') { | |
| 974 + stripped.find('\'').map(|end| stripped[..end | |
| +].to_string()) | |
| 975 + } else if let Some(stripped) = remaining.strip_prefix | |
| +('(') { | |
| 976 + stripped.find(')').map(|end| stripped[..end | |
| +].to_string()) | |
| 977 } else { | |
| 978 None | |
| 979 }; | |
| ⏺ Bash(cargo clippy --all-targets --all-features -- -D warnings 2>&1) | |
| ⎿ Checking mdriver v0.8.0 (/Users/llimllib/code/mdriver/better-suppor | |
| t-endnotes) | |
| Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.43s | |
| ⏺ Clippy passes. Let me also run cargo fmt and then run the tests one more time. | |
| ⏺ Bash(cargo fmt && cargo test 2>&1 | tail -20) | |
| ⎿ test strip_ansi_tests::test_strip_basic_sgr ... ok | |
| test strip_ansi_tests::test_strip_mixed_content ... ok | |
| test strip_ansi_tests::test_strip_osc8_with_styling ... ok | |
| … +18 lines (ctrl+o to expand) | |
| ⏺ Let me test the implementation with the cli.md file. | |
| ⏺ Bash(cargo run -- cli.md 2>&1 | head -80) | |
| ⎿ Compiling mdriver v0.8.0 (/Users/llimllib/code/mdriver/better-suppor | |
| t-endnotes) | |
| Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.78s | |
| … +103 lines (ctrl+o to expand) | |
| ⏺ Bash(cargo run -- cli.md 2>&1 | tail -50) | |
| ⎿ ### Codespaces | |
| To add GitHub CLI to your codespace, add the following to your | |
| ⏺ The implementation is working. Reference links like [Homebrew][] are being converted to citations like Homebrew[4], and the bibliography section at the end shows all the resolved references with clickable URLs. | |
| Let me update the todo list and add some test fixtures. | |
| ⏺ Bash(ls -la | |
| /Users/llimllib/code/mdriver/better-support-endnotes/tests/fixtures/) | |
| ⎿ total 0 | |
| drwxr-xr-x 7 llimllib 224 Jan 14 15:18 ./ | |
| drwxr-xr-x 6 llimllib 192 Jan 14 15:18 ../ | |
| … +5 lines (ctrl+o to expand) | |
| ⏺ Read(tests/fixtures/ansi/hyperlinks.toml) | |
| ⎿ Read 11 lines | |
| ⏺ Read(tests/conformance.rs) | |
| ⎿ Read 112 lines | |
| ⏺ Read(tests/unit.rs) | |
| ⎿ Read 50 lines | |
| ⏺ Bash(tail -20 | |
| /Users/llimllib/code/mdriver/better-support-endnotes/tests/unit.rs) | |
| ⎿ let result = p.format_inline("<< && >>"); | |
| assert_eq!(result, "<< && >>"); | |
| } | |
| … +17 lines (ctrl+o to expand) | |
| ⏺ Read(tests/unit.rs) | |
| ⎿ Read 50 lines | |
| ⏺ Bash(wc -l /Users/llimllib/code/mdriver/better-support-endnotes/tests/unit.rs) | |
| ⎿ 819 /Users/llimllib/code/mdriver/better-support-endnotes/tests/uni | |
| t.rs | |
| ⏺ Read(tests/unit.rs) | |
| ⎿ Read 11 lines | |
| ⏺ Update(tests/unit.rs) | |
| ⎿ Added 150 lines | |
| 817 assert_eq!(result, "Test &"); | |
| 818 } | |
| 819 } | |
| 820 + | |
| 821 + mod reference_links { | |
| 822 + use super::*; | |
| 823 + | |
| 824 + // Test full reference link [text][label] when | |
| +definition is known | |
| 825 + #[test] | |
| 826 + fn test_full_reference_link_resolved() { | |
| 827 + let mut p = parser(); | |
| 828 + // First feed the definition | |
| 829 + let _ = p.feed("[example]: | |
| +https://example.com\n\n"); | |
| 830 + // Now feed content with a reference link | |
| 831 + let result = p.feed("Visit [the site][example] | |
| +today.\n\n"); | |
| 832 + let stripped = strip_ansi(&result); | |
| 833 + assert!(stripped.contains("the site")); | |
| 834 + // Should be a hyperlink (OSC8) | |
| 835 + | |
| +assert!(result.contains("\x1b]8;;https://example.com")); | |
| 836 + } | |
| 837 + | |
| 838 + // Test collapsed reference link [label][] when | |
| +definition is known | |
| 839 + #[test] | |
| 840 + fn test_collapsed_reference_link_resolved() { | |
| 841 + let mut p = parser(); | |
| 842 + // First feed the definition | |
| 843 + let _ = p.feed("[example]: | |
| +https://example.com\n\n"); | |
| 844 + // Now feed content with a collapsed reference link | |
| 845 + let result = p.feed("Visit [example][] today.\n\n"); | |
| 846 + let stripped = strip_ansi(&result); | |
| 847 + assert!(stripped.contains("example")); | |
| 848 + // Should be a hyperlink (OSC8) | |
| 849 + | |
| +assert!(result.contains("\x1b]8;;https://example.com")); | |
| 850 + } | |
| 851 + | |
| 852 + // Test shortcut reference link [label] when definition | |
| +is known | |
| 853 + #[test] | |
| 854 + fn test_shortcut_reference_link_resolved() { | |
| 855 + let mut p = parser(); | |
| 856 + // First feed the definition | |
| 857 + let _ = p.feed("[example]: | |
| +https://example.com\n\n"); | |
| 858 + // Now feed content with a shortcut reference link | |
| 859 + let result = p.feed("Visit [example] today.\n\n"); | |
| 860 + let stripped = strip_ansi(&result); | |
| 861 + assert!(stripped.contains("example")); | |
| 862 + // Should be a hyperlink (OSC8) | |
| 863 + | |
| +assert!(result.contains("\x1b]8;;https://example.com")); | |
| 864 + } | |
| 865 + | |
| 866 + // Test case-insensitive label matching | |
| 867 + #[test] | |
| 868 + fn test_case_insensitive_label() { | |
| 869 + let mut p = parser(); | |
| 870 + // Definition with lowercase label | |
| 871 + let _ = p.feed("[example]: | |
| +https://example.com\n\n"); | |
| 872 + // Reference with uppercase label | |
| 873 + let result = p.feed("Visit [EXAMPLE][] today.\n\n"); | |
| 874 + // Should still be a hyperlink | |
| 875 + | |
| +assert!(result.contains("\x1b]8;;https://example.com")); | |
| 876 + } | |
| 877 + | |
| 878 + // Test citation style when definition comes after usage | |
| 879 + #[test] | |
| 880 + fn test_citation_style_unresolved() { | |
| 881 + let mut p = parser(); | |
| 882 + // Reference link before definition | |
| 883 + let result = p.feed("Read the [documentation][docs] | |
| +first.\n\n"); | |
| 884 + let stripped = strip_ansi(&result); | |
| 885 + // Should have citation-style output | |
| 886 + assert!(stripped.contains("documentation[1]")); | |
| 887 + } | |
| 888 + | |
| 889 + // Test that first definition wins for duplicate labels | |
| 890 + #[test] | |
| 891 + fn test_first_definition_wins() { | |
| 892 + let mut p = parser(); | |
| 893 + let _ = p.feed("[test]: https://first.com\n\n"); | |
| 894 + let _ = p.feed("[test]: https://second.com\n\n"); | |
| 895 + let result = p.feed("Visit [test].\n\n"); | |
| 896 + // Should use first URL | |
| 897 + assert!(result.contains("https://first.com")); | |
| 898 + assert!(!result.contains("https://second.com")); | |
| 899 + } | |
| 900 + | |
| 901 + // Test bibliography output at flush | |
| 902 + #[test] | |
| 903 + fn test_bibliography_at_flush() { | |
| 904 + let mut p = parser(); | |
| 905 + // Reference link before definition | |
| 906 + let _ = p.feed("Visit [mysite][site].\n\n"); | |
| 907 + // Then provide the definition | |
| 908 + let _ = p.feed("[site]: https://mysite.com\n\n"); | |
| 909 + // Flush should include bibliography | |
| 910 + let flush_result = p.flush(); | |
| 911 + assert!(flush_result.contains("References")); | |
| 912 + assert!(flush_result.contains("[1]")); | |
| 913 + | |
| +assert!(flush_result.contains("https://mysite.com")); | |
| 914 + } | |
| 915 + | |
| 916 + // Test unresolved reference in bibliography | |
| 917 + #[test] | |
| 918 + fn test_unresolved_in_bibliography() { | |
| 919 + let mut p = parser(); | |
| 920 + // Reference link with no definition | |
| 921 + let _ = p.feed("Visit [nowhere][missing].\n\n"); | |
| 922 + // Flush should show unresolved | |
| 923 + let flush_result = p.flush(); | |
| 924 + assert!(flush_result.contains("unresolved")); | |
| 925 + } | |
| 926 + | |
| 927 + // Test link definition with title | |
| 928 + #[test] | |
| 929 + fn test_definition_with_title() { | |
| 930 + let mut p = parser(); | |
| 931 + let _ = p.feed("[example]: https://example.com | |
| +\"Example Site\"\n\n"); | |
| 932 + let result = p.feed("Visit [example].\n\n"); | |
| 933 + // Should be a hyperlink (title is stored but not | |
| +displayed inline) | |
| 934 + | |
| +assert!(result.contains("\x1b]8;;https://example.com")); | |
| 935 + } | |
| 936 + | |
| 937 + // Test angle-bracketed URL in definition | |
| 938 + #[test] | |
| 939 + fn test_angle_bracketed_url() { | |
| 940 + let mut p = parser(); | |
| 941 + let _ = p.feed("[example]: <https://example.com/path | |
| + with spaces>\n\n"); | |
| 942 + let result = p.feed("Visit [example].\n\n"); | |
| 943 + // Should be a hyperlink with the URL | |
| 944 + assert!(result.contains("https://example.com/path | |
| +with spaces")); | |
| 945 + } | |
| 946 + | |
| 947 + // Test that link definitions don't emit content | |
| 948 + #[test] | |
| 949 + fn test_definition_no_emission() { | |
| 950 + let mut p = parser(); | |
| 951 + let result = p.feed("[example]: | |
| +https://example.com\n\n"); | |
| 952 + // Link definitions should not emit anything | |
| 953 + assert!(result.is_empty()); | |
| 954 + } | |
| 955 + | |
| 956 + // Test multiple reference links | |
| 957 + #[test] | |
| 958 + fn test_multiple_references() { | |
| 959 + let mut p = parser(); | |
| 960 + // Feed definitions first | |
| 961 + let _ = p.feed("[a]: https://a.com\n"); | |
| 962 + let _ = p.feed("[b]: https://b.com\n\n"); | |
| 963 + // Feed content with multiple references | |
| 964 + let result = p.feed("Visit [a] and [b].\n\n"); | |
| 965 + // Both should be hyperlinks | |
| 966 + assert!(result.contains("https://a.com")); | |
| 967 + assert!(result.contains("https://b.com")); | |
| 968 + } | |
| 969 + } | |
| ⏺ Bash(cargo test reference_links 2>&1) | |
| ⎿ Compiling mdriver v0.8.0 (/Users/llimllib/code/mdriver/better-suppor | |
| t-endnotes) | |
| Finished `test` profile [unoptimized + debuginfo] target(s) in 0.36 | |
| … +43 lines (ctrl+o to expand) | |
| ⏺ All 12 reference link tests pass. Let me run the full test suite and then run clippy to finalize. | |
| ⏺ Bash(cargo test 2>&1 | tail -30) | |
| ⎿ test reference_links::test_case_insensitive_label ... ok | |
| test reference_links::test_full_reference_link_resolved ... ok | |
| test reference_links::test_definition_with_title ... ok | |
| … +28 lines (ctrl+o to expand) | |
| ⏺ Bash(cargo fmt && cargo clippy --all-targets --all-features -- -D warnings | |
| 2>&1) | |
| ⎿ Checking mdriver v0.8.0 (/Users/llimllib/code/mdriver/better-suppor | |
| t-endnotes) | |
| Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.40s | |
| ⏺ The implementation is complete. Here's a summary of what was added: | |
| Summary | |
| New Features | |
| 1. Link Reference Definition Parsing - The parser now recognizes and stores link definitions like [label]: url "title" without emitting them as content | |
| 2. Reference Link Support - All three types of reference links are now supported: | |
| - Full: [link text][label] | |
| - Collapsed: [label][] | |
| - Shortcut: [label] | |
| 3. Citation-Style Output - When a reference link appears before its definition (the streaming challenge), it's rendered as text[n] where n is a citation number | |
| 4. Bibliography Section - At flush(), a "References" section is emitted with all cited references, showing the label and URL as clickable hyperlinks | |
| Key Behaviors | |
| - If definition is known before the link: renders as normal OSC8 hyperlink | |
| - If definition comes after: renders as citation with bibliography at end | |
| - Case-insensitive label matching per GFM spec | |
| - First definition wins for duplicate labels | |
| - Unresolved references shown as "(unresolved)" in bibliography | |
| Tests Added | |
| 12 new unit tests covering: | |
| - Full, collapsed, and shortcut reference links | |
| - Case-insensitive matching | |
| - Citation-style output | |
| - Bibliography generation | |
| - Duplicate and unresolved definitions | |
| - Angle-bracketed URLs and titles | |
| Files Modified | |
| - src/lib.rs - Core implementation (~200 lines added) | |
| - tests/unit.rs - 12 new test cases | |
| ✻ Cooked for 13m 34s | |
| ❯ cmmit the changes | |
| ⏺ Bash(git status) | |
| ⎿ On branch better-support-endnotes | |
| Changes not staged for commit: | |
| (use "git add <file>..." to update what will be committed) | |
| … +9 lines (ctrl+o to expand) | |
| ⏺ Bash(git diff --stat) | |
| ⎿ src/lib.rs | 282 ++++++++++++++++++++++++++++++++++++++++++++++++++ | |
| +++++++- | |
| tests/unit.rs | 150 +++++++++++++++++++++++++++++++ | |
| 2 files changed, 431 insertions(+), 1 deletion(-) | |
| ⏺ Bash(git log --oneline -5) | |
| ⎿ ac901f4 feat: fix image-inside-link bug and add parallel image prefetch | |
| ing (#12) | |
| db84adf feat: add HTML <img> tag support and fix kitty image sizing (#1 | |
| … +5 lines (ctrl+o to expand) | |
| ⏺ Bash(git add src/lib.rs tests/unit.rs && git commit -m "feat: add | |
| citation-style reference link support…) | |
| ⎿ [better-support-endnotes ee45f56] feat: add citation-style reference li | |
| nk support | |
| 2 files changed, 431 insertions(+), 1 deletion(-) | |
| ⏺ Bash(git status) | |
| ⎿ On branch better-support-endnotes | |
| Untracked files: | |
| (use "git add <file>..." to include in what will be committed) | |
| … +4 lines (ctrl+o to expand) | |
| ⏺ Done. Committed to branch better-support-endnotes: | |
| ee45f56 feat: add citation-style reference link support | |
| The cli.md file remains untracked since it was just used for testing. Would you like me to create a PR or do anything else with this branch? | |
| ✻ Sautéed for 32s | |
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