Module model 

Diff model: what changed, organized as files -> hunks -> lines.

Structs

DiffLine

DiffModel

FileDiff

HashCache

Memo slots for FileDiff::content_hash/FileDiff::sides_hash, which the UI probes every frame — hashing full file contents per frame is the cost this avoids. Compares equal always so FileDiff equality is on data.

Hunk

HunkId

Stable identity for a hunk: hash of its normalized content. Survives edits elsewhere in the file; changes when the hunk’s lines change.

Enums

FileStatus

LineKind

Functions

hunk_id

Hash the hunk’s content (kinds + text) into a stable id.