Method FindNextDiffLine

internal/buffer/buffer.go:1426–1457

FindNextDiffLine returns the line number of the next block of diffs. If `startLine` is already in a block of diffs, lines in that block are skipped.

(startLine int, forward bool)

// FindNextDiffLine returns the line number of the next block of diffs.
// If `startLine` is already in a block of diffs, lines in that block are skipped.
func (b *Buffer) FindNextDiffLine(startLine int, forward bool) (int, error) {
	if b.diff == nil {
		return 0, errors.New("no diff data")
	}
	startStatus, ok := b.diff[startLine]
	if !ok {
		startStatus = DSUnchanged
	}
	curLine := startLine
	for {
		curStatus, ok := b.diff[curLine]
		if !ok {
			curStatus = DSUnchanged
		}
		if curLine < 0 || curLine > b.LinesNum() {
			return 0, errors.New("no next diff hunk")
		}
		if curStatus != startStatus {
			if startStatus != DSUnchanged && curStatus == DSUnchanged {
				// Skip over the block of unchanged text
				startStatus = DSUnchanged
			} else {
				return curLine, nil
			}
		}
		if forward {
			curLine++
		} else {
			curLine--
		}
	}
}

// SearchMatch returns true if the given location is within a match of the last search.
// It is used for search highlighting