d0f52751ce
The indent trigger was using .abs() which fired on both increased indent (non-indented → indented) AND decreased indent (indented → non-indented). This caused drop-cap style paragraphs (indented first line, flush-left continuation) to incorrectly split into two blocks. Per plan Phase 4.4 heuristic #2, indent change should only trigger when the current line is MORE indented (to the right, larger x0) than the block average - i.e., a new paragraph starting after non-indented text. It should NOT trigger for decreased indent (first line indented, rest flush-left). Fix: Remove .abs() and only check if line_x0 - block_avg_x0 > threshold. Tests: - test_indented_first_line_new_block: PASS (non-indented → indented splits) - test_indented_first_line_of_paragraph_not_split: PASS (drop cap stays together) - All 179 line module tests: PASS
85 lines
2.4 KiB
Rust
85 lines
2.4 KiB
Rust
//! Generate font fingerprint entry from a TTF/OTF file.
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//!
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//! Usage: cargo run --example gen_font_fingerprint -- /path/to/font.ttf
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//!
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//! Outputs JSON in the format required by build/font-fingerprints.json.
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use std::env;
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use std::fs;
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use std::io::Read;
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use sha2::{Digest, Sha256};
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fn main() -> Result<(), Box<dyn std::error::Error>> {
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let args: Vec<String> = env::args().collect();
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if args.len() < 2 {
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eprintln!("Usage: {} <font.ttf>", args[0]);
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std::process::exit(1);
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}
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let font_path = &args[1];
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// Read font file
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let mut font_data = Vec::new();
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fs::File::open(font_path)?.read_to_end(&mut font_data)?;
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// Compute SHA-256
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let mut hasher = Sha256::new();
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hasher.update(&font_data);
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let sha256_hex = format!("{:x}", hasher.finalize());
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// Parse font using ttf_parser (index 0 for the first face in the font)
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let face = ttf_parser::Face::parse(&font_data, 0)
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.map_err(|e| format!("Failed to parse font: {:?}", e))?;
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// Build GID->codepoint mappings
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let mut gid_to_cp: Vec<(u16, u32)> = Vec::new();
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// Scan Unicode ranges that the font likely supports
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// We test each codepoint and record the mapping
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for cp in 0x20..0x7F { // Printable ASCII
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let c = char::from_u32(cp).unwrap();
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if let Some(gid) = face.glyph_index(c) {
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gid_to_cp.push((gid.0, cp));
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}
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}
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// Add Latin-1 Supplement (0xA0-0xFF)
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for cp in 0xA0..0x100 {
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let c = char::from_u32(cp).unwrap();
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if let Some(gid) = face.glyph_index(c) {
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gid_to_cp.push((gid.0, cp));
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}
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}
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// Common punctuation and symbols (0x2000-0x206F, 0x20A0-0x20CF)
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for cp in 0x2000..0x20D0 {
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let c = char::from_u32(cp).unwrap();
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if let Some(gid) = face.glyph_index(c) {
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gid_to_cp.push((gid.0, cp));
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}
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}
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// Sort by GID for output
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gid_to_cp.sort_by_key(|(gid, _)| *gid);
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// Remove duplicates (same GID may map to multiple codepoints)
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gid_to_cp.dedup_by_key(|(gid, _)| *gid);
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// Get font name from path
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let font_name = font_path
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.rsplit('/')
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.next()
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.or_else(|| font_path.rsplit('\\').next())
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.unwrap_or("Unknown");
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// Output JSON entry
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let json = serde_json::json!([{
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"sha256_hex": sha256_hex,
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"font_name": font_name,
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"entries": gid_to_cp
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}]);
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println!("{}", serde_json::to_string_pretty(&json)?);
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Ok(())
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}
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