position-line

Returns the line number of the line containing a given position. Lines are numbered starting with 0.

Calling this method may force the recalculation of location information if a maximum width is set for the editor, even if the editor currently has delayed refreshing (see refresh-delayed?). If the editor is not displayed and the editor has a maximum width, line breaks are calculated as for line-start-position.

See also paragraph-start-position, which operates on paragraphs (determined by explicit newline characters) instead of lines (determined by both explicit newline characters and automatic line-wrapping).

• (send a-text position-line start at-eol?) -> exact non-negative integer
      start : exact non-negative integer
      at-eol? = #f : boolean

  See End of Line for a discussion of at-eol?.