diff options
Diffstat (limited to 'src/misc2.c')
| -rw-r--r-- | src/misc2.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/src/misc2.c b/src/misc2.c index 949d7e21a8..8cd5683047 100644 --- a/src/misc2.c +++ b/src/misc2.c @@ -469,6 +469,57 @@ decl(lp) } /* + * Get the line number relative to the current cursor position, i.e. the + * difference between line number and cursor position. Only look for lines that + * can be visible, folded lines don't count. + */ + linenr_T +get_cursor_rel_lnum(wp, lnum) + win_T *wp; + linenr_T lnum; /* line number to get the result for */ +{ + linenr_T cursor = wp->w_cursor.lnum; + linenr_T retval = 0; + +#ifdef FEAT_FOLDING + if (hasAnyFolding(wp)) + { + if (lnum > cursor) + { + while (lnum > cursor) + { + (void)hasFolding(lnum, &lnum, NULL); + /* if lnum and cursor are in the same fold, + * now lnum <= cursor */ + if (lnum > cursor) + retval++; + lnum--; + } + } + else if (lnum < cursor) + { + while (lnum < cursor) + { + (void)hasFolding(lnum, NULL, &lnum); + /* if lnum and cursor are in the same fold, + * now lnum >= cursor */ + if (lnum < cursor) + retval--; + lnum++; + } + } + /* else if (lnum == cursor) + * retval = 0; + */ + } + else +#endif + retval = lnum - cursor; + + return retval; +} + +/* * Make sure curwin->w_cursor.lnum is valid. */ void |