umputun / revdiff / 24231077439

89%

Build Type

push

github

Committed by web-flow

Commit Message

feat: add intra-line word-diff highlighting (#87)

* feat: add color utility and theme wiring for intra-line word-diff

* feat: add core word-diff algorithm — tokenizer, LCS, and range computation

* feat: add line pairing and intra-range computation for word-diff

* feat: integrate intra-line word-diff into render pipeline

Wire recomputeIntraRanges into handleFileLoaded, add
applyIntraLineHighlight method that inserts ANSI bg markers
for changed words in add/remove lines. Supports color mode
(WordAddBg/WordRemoveBg with line bg restoration) and no-color
fallback (reverse-video). Add background state tracking to
reemitANSIState so word-diff bg survives across wrapped
continuation lines. Extract buildSGRPrefix to reduce nesting.

* feat: complete intra-line word-diff — collapsed refactor, themes, docs, review fixes

* move completed plan: 20260409-intraline-word-diff.md

* fix: address Copilot review — hex validation and long-line cap

- parseHexRGB now validates each nibble explicitly; invalid hex chars
  return ok=false instead of silently parsing as black. matches the
  shiftLightness contract ("unparseable -> unchanged").
- changedTokenRanges caps line length at 500 bytes before running LCS
  to prevent O(m*n) memory blowup on pathological input (minified
  files, very long configs). lines above the cap still render with
  whole-line add/remove highlighting, just no word-level detail.

Copilot also flagged `for i := range n` as a compile error but that's
a false positive — Go 1.22+ supports integer ranges.

Coverage Stats

435 of 470 new or added lines in 7 files covered. (92.55%)

1 existing line in 1 file now uncovered.

5588 of 6346 relevant lines covered (88.06%)

397.38 hits per line