Fix redisplay when mode-line-format changes mode-line's height

* lisp/frame.el (top-level): Add mode-line-format,
tab-line-format, and header-line-format to the list of variables
that should trigger an immediate redisplay of the buffer's
window.  This fixes redisplay of windows when the mode line
changes its height.

* src/xdisp.c (window_box_height): Use the window's
mode_line_height, tab_line_height, and header_line_height fields
in preference to CURRENT_MODE_LINE_HEIGHT,
CURRENT_TAB_LINE_HEIGHT, and CURRENT_HEADER_LINE_HEIGHT,
respectively.  This fixes display of vertical scroll bar when the
height of the window's mode line changes.
* src/dispnew.c (adjust_glyph_matrix): When resizing a window's
matrix, reset the mode_line_p flag of the previous mode-line row,
so that the window_box_height, CURRENT_MODE_LINE_HEIGHT, and their
ilk won't use stale info.  (Bug#38828)

1 files changed, 3 insertions, 0 deletions

diff --git a/lisp/frame.el b/lisp/frame.el
index c533e5a23fb..16ee7580f89 100644
--- a/lisp/frame.el
+++ b/lisp/frame.el
@@ -2725,6 +2725,9 @@ See also `toggle-frame-maximized'."
         line-prefix
         wrap-prefix
         truncate-lines
+        mode-line-format
+        header-line-format
+        tab-line-format
         display-line-numbers
         display-line-numbers-width
         display-line-numbers-current-absolute