Implement scrolling of TTY menus when the screen is too short.

 src/term.c (tty_menu_display): Accept an additional argument, the
 menu item from which to start displaying the menu.  Account for
 the value of Y when limiting the menu to the number of available
 screen lines.
 (mi_result): New enumeration.
 (read_menu_input): Return enumerated value.  When the y coordinate
 hits min_y or max_y, return scroll indication instead of wrapping
 around the menu.
 (tty_menu_activate): Handle the scrolling indications from
 read_menu_input.  Compute the first menu item to display and pass
 it to tty_menu_display.

 lisp/menu-bar.el (tty-menu-navigation-map): Bind shifted mouse clicks
 to commands that scroll the menu.

1 files changed, 16 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index d9264f6a691..018489bdbc2 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,19 @@
+2013-10-14  Eli Zaretskii  <eliz@gnu.org>
+
+        Implement scrolling of TTY menus when the screen is too short.
+
+        * term.c (tty_menu_display): Accept an additional argument, the
+        menu item from which to start displaying the menu.  Account for
+        the value of Y when limiting the menu to the number of available
+        screen lines.
+        (mi_result): New enumeration.
+        (read_menu_input): Return enumerated value.  When the y coordinate
+        hits min_y or max_y, return scroll indication instead of wrapping
+        around the menu.
+        (tty_menu_activate): Handle the scrolling indications from
+        read_menu_input.  Compute the first menu item to display and pass
+        it to tty_menu_display.
+
 2013-10-14  Dmitry Antipov  <dmantipov@yandex.ru>
 
         * termhooks.h (FRAME_MUST_WRITE_SPACES, FRAME_LINE_INS_DEL_OK)