fix(api/buffer): fix handling of viewport of non-current buffer

A lot of functions in move.c only worked for curwin, alternatively
took a `wp` arg but still only work if that happens to be curwin.

Refactor those that are needed for update_topline(wp) to work
for any window.

fixes #27723
fixes #27720

1 files changed, 6 insertions, 6 deletions

diff --git a/src/nvim/textobject.c b/src/nvim/textobject.c
index d9c2b3b111..8ac63aad16 100644
--- a/src/nvim/textobject.c
+++ b/src/nvim/textobject.c
@@ -187,7 +187,7 @@ bool findpar(bool *pincl, int dir, int count, int what, bool both)
 
       // skip folded lines
       fold_skipped = false;
-      if (first && hasFolding(curr, &fold_first, &fold_last)) {
+      if (first && hasFolding(curwin, curr, &fold_first, &fold_last)) {
         curr = ((dir > 0) ? fold_last : fold_first) + dir;
         fold_skipped = true;
       }
@@ -318,8 +318,8 @@ int fwd_word(int count, bool bigword, bool eol)
   while (--count >= 0) {
     // When inside a range of folded lines, move to the last char of the
     // last line.
-    if (hasFolding(curwin->w_cursor.lnum, NULL, &curwin->w_cursor.lnum)) {
-      coladvance(MAXCOL);
+    if (hasFolding(curwin, curwin->w_cursor.lnum, NULL, &curwin->w_cursor.lnum)) {
+      coladvance(curwin, MAXCOL);
     }
     int sclass = cls();  // starting class
 
@@ -374,7 +374,7 @@ int bck_word(int count, bool bigword, bool stop)
   while (--count >= 0) {
     // When inside a range of folded lines, move to the first char of the
     // first line.
-    if (hasFolding(curwin->w_cursor.lnum, &curwin->w_cursor.lnum, NULL)) {
+    if (hasFolding(curwin, curwin->w_cursor.lnum, &curwin->w_cursor.lnum, NULL)) {
       curwin->w_cursor.col = 0;
     }
     sclass = cls();
@@ -431,8 +431,8 @@ int end_word(int count, bool bigword, bool stop, bool empty)
   while (--count >= 0) {
     // When inside a range of folded lines, move to the last char of the
     // last line.
-    if (hasFolding(curwin->w_cursor.lnum, NULL, &curwin->w_cursor.lnum)) {
-      coladvance(MAXCOL);
+    if (hasFolding(curwin, curwin->w_cursor.lnum, NULL, &curwin->w_cursor.lnum)) {
+      coladvance(curwin, MAXCOL);
     }
     sclass = cls();
     if (inc_cursor() == -1) {