Cache current header and mode line height for each window.

* window.h (struct window): New fields mode_line_height
and header_line_height.
* window.c (make_window): Initialize them.
* dispextern.h (CURRENT_MODE_LINE_HEIGHT)
(CURRENT_HEADER_LINE_HEIGHT): Use them.  Adjust comment.
(current_mode_line_height, current_header_line_height):
Remove declaration.
* xdisp.c (current_mode_line_height, current_header_line_height):
Remove.
(pos_visible_p, init_xdisp): Adjust user.
(redisplay_window): Invalidate mode_line_height and
header_line_height if current and desired matrices do not agree.

1 files changed, 16 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index d4a7abefd57..898fbd8ab88 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,5 +1,21 @@
 2013-09-05  Dmitry Antipov  <dmantipov@yandex.ru>
 
+        Cache current header and mode line height for each window.
+        * window.h (struct window): New fields mode_line_height
+        and header_line_height.
+        * window.c (make_window): Initialize them.
+        * dispextern.h (CURRENT_MODE_LINE_HEIGHT)
+        (CURRENT_HEADER_LINE_HEIGHT): Use them.  Adjust comment.
+        (current_mode_line_height, current_header_line_height):
+        Remove declaration.
+        * xdisp.c (current_mode_line_height, current_header_line_height):
+        Remove.
+        (pos_visible_p, init_xdisp): Adjust user.
+        (redisplay_window): Invalidate mode_line_height and
+        header_line_height if current and desired matrices do not agree.
+
+2013-09-05  Dmitry Antipov  <dmantipov@yandex.ru>
+
         * fontset.c, window.c, xdisp.c (toplevel): Use TERM_HEADER.
         * xfaces.c (toplevel) [HAVE_X_WINDOWS]: Do not include xterm.h twice.