Struct CodeBlockUtils 

pub struct CodeBlockUtils;

Utility functions for detecting and handling code blocks in Markdown

Implementations

impl CodeBlockUtils

pub fn detect_code_blocks(content: &str) -> Vec<(usize, usize)>

Detect all code blocks in the content (NOT including inline code spans)

Uses pulldown-cmark for spec-compliant CommonMark parsing. This correctly handles:

• Fenced code blocks (``` and ~~~)
• Indented code blocks (4 spaces or tab)
• Code blocks inside lists, blockquotes, and other containers
• Edge cases like backticks in info strings (which invalidate the fence)

Returns a sorted vector of (start, end) byte offset tuples.

pub fn detect_code_blocks_and_spans(content: &str) -> ParseResult

Returns code block ranges, inline code span ranges, and detailed code block info in a single pulldown-cmark pass.

pub fn is_in_code_block_or_span(blocks: &[(usize, usize)], pos: usize) -> bool

Check if a position is within a code block (for compatibility)

pub fn is_in_code_block(blocks: &[(usize, usize)], pos: usize) -> bool

Check if a byte position falls within any of the given sorted, non-overlapping ranges.

Uses binary search on the sorted block ranges for O(log n) lookup. The blocks slice must be sorted by start position (as returned by detect_code_blocks and detect_code_blocks_and_spans).

pub fn analyze_code_block_context( lines: &[LineInfo], line_idx: usize, min_continuation_indent: usize, ) -> CodeBlockContext

Analyze code block context relative to list parsing This is the core function implementing Design #3’s three-tier classification

pub fn calculate_min_continuation_indent( content: &str, lines: &[LineInfo], current_line_idx: usize, ) -> usize

Calculate minimum indentation required for code block to continue a list Based on the most recent list item’s marker width