Function parseDiffLine

internal/ui/diff.go:64–104

(line string, oldNum, newNum *int)

}

func parseDiffLine(line string, oldNum, newNum *int) *DiffLine {
	switch {
	case strings.HasPrefix(line, "diff --git"),
		strings.HasPrefix(line, "index "),
		strings.HasPrefix(line, "new file"),
		strings.HasPrefix(line, "deleted file"),
		strings.HasPrefix(line, "similarity"),
		strings.HasPrefix(line, "rename"),
		strings.HasPrefix(line, "old mode"),
		strings.HasPrefix(line, "new mode"),
		strings.HasPrefix(line, "--- "),
		strings.HasPrefix(line, "+++ "):
		// Skip raw git headers — we show a clean file banner instead
		return nil
	case strings.HasPrefix(line, "@@"):
		parseHunkHeader(line, oldNum, newNum)
		content := extractHunkContext(line)
		return &DiffLine{Type: LineHunkHeader, Content: content, OldNum: -1, NewNum: -1}
	case strings.HasPrefix(line, "+"):
		dl := &DiffLine{Type: LineAdded, Content: line[1:], OldNum: -1, NewNum: *newNum}
		*newNum++
		return dl
	case strings.HasPrefix(line, "-"):
		dl := &DiffLine{Type: LineRemoved, Content: line[1:], OldNum: *oldNum, NewNum: -1}
		*oldNum++
		return dl
	case strings.HasPrefix(line, `\`):
		return nil
	case line == "":
		return nil
	default:
		content := line
		if strings.HasPrefix(line, " ") {
			content = line[1:]
		}
		dl := &DiffLine{Type: LineContext, Content: content, OldNum: *oldNum, NewNum: *newNum}
		*oldNum++
		*newNum++
		return dl
	}
}

// extractHunkContext pulls the function/context part from a hunk header.
// "@@ -13,6 +13,7 @@ func main() {" → "func main() {"