[PATCH 3/3] bindings: let <Alt+Home/End> move the cursor to top/bottom of viewport

For now these are hidden keystrokes -- they are not listed anywhere,
and the functions are not bindable by the user.
---
 src/definitions.h | 2 ++
 src/global.c      | 4 +++-
 src/nano.c        | 2 ++
 src/prototypes.h  | 1 +
 src/winio.c       | 8 +++++++-
 5 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/src/definitions.h b/src/definitions.h
index 86eeae35..ef31f898 100644
--- a/src/definitions.h
+++ b/src/definitions.h
@@ -195,6 +195,8 @@
 #define ALT_RIGHT     0x422
 #define ALT_UP        0x423
 #define ALT_DOWN      0x424
+#define ALT_HOME      0x425
+#define ALT_END       0x426
 #define ALT_PAGEUP    0x427
 #define ALT_PAGEDOWN  0x428
 #define ALT_INSERT    0x42C
diff --git a/src/global.c b/src/global.c
index 87beeacc..62337df4 100644
--- a/src/global.c
+++ b/src/global.c
@@ -104,7 +104,7 @@ int shiftleft, shiftright, shiftup, shiftdown;
 int shiftcontrolleft, shiftcontrolright, shiftcontrolup, shiftcontroldown;
 int shiftcontrolhome, shiftcontrolend;
 int altleft, altright, altup, altdown;
-int altpageup, altpagedown;
+int althome, altend, altpageup, altpagedown;
 int altinsert, altdelete;
 int shiftaltleft, shiftaltright, shiftaltup, shiftaltdown;
 #endif
@@ -1314,6 +1314,8 @@ void shortcut_init(void)
 	add_to_sclist(MMAIN, "^Del", CONTROL_DELETE, chop_next_word, 0);
 	add_to_sclist(MMAIN, "M-Del", ALT_DELETE, zap_text, 0);
 	add_to_sclist(MMAIN, "M-Ins", ALT_INSERT, put_or_lift_anchor, 0);
+	add_to_sclist(MMAIN, "M-Home", ALT_HOME, to_top_row, 0);
+	add_to_sclist(MMAIN, "M-End", ALT_END, to_bottom_row, 0);
 	add_to_sclist(MMAIN, "M-PgUp", ALT_PAGEUP, to_prev_anchor, 0);
 	add_to_sclist(MMAIN, "M-PgDn", ALT_PAGEDOWN, to_next_anchor, 0);
 	add_to_sclist(MMAIN, "M-\"", 0, put_or_lift_anchor, 0);
diff --git a/src/nano.c b/src/nano.c
index 47221064..87806c45 100644
--- a/src/nano.c
+++ b/src/nano.c
@@ -2429,6 +2429,8 @@ int main(int argc, char **argv)
 	altup = get_keycode("kUP3", ALT_UP);
 	altdown = get_keycode("kDN3", ALT_DOWN);
 
+	althome = get_keycode("kHOM3", ALT_HOME);
+	altend = get_keycode("kEND3", ALT_END);
 	altpageup = get_keycode("kPRV3", ALT_PAGEUP);
 	altpagedown = get_keycode("kNXT3", ALT_PAGEDOWN);
 	altinsert = get_keycode("kIC3", ALT_INSERT);
diff --git a/src/prototypes.h b/src/prototypes.h
index 0afdadad..2ef73c0a 100644
--- a/src/prototypes.h
+++ b/src/prototypes.h
@@ -75,6 +75,7 @@ extern int shiftcontrolup, shiftcontroldown;
 extern int shiftcontrolhome, shiftcontrolend;
 extern int altleft, altright;
 extern int altup, altdown;
+extern int althome, altend;
 extern int altpageup, altpagedown;
 extern int altinsert, altdelete;
 extern int shiftaltleft, shiftaltright;
diff --git a/src/winio.c b/src/winio.c
index d0ef2525..2e392566 100644
--- a/src/winio.c
+++ b/src/winio.c
@@ -1173,6 +1173,10 @@ int parse_kbinput(WINDOW *frame)
 		return ALT_UP;
 	else if (keycode == altdown)
 		return ALT_DOWN;
+	else if (keycode == althome)
+		return ALT_HOME;
+	else if (keycode == altend)
+		return ALT_END;
 	else if (keycode == altpageup)
 		return ALT_PAGEUP;
 	else if (keycode == altpagedown)
@@ -1216,11 +1220,13 @@ int parse_kbinput(WINDOW *frame)
 			if (!meta_key)
 				shift_held = TRUE;
 		}
-		/* Is Alt being held? */
+		/* Is only Alt being held? */
 		if (modifiers == 0x08) {
 			switch (keycode) {
 				case KEY_UP:    return ALT_UP;
 				case KEY_DOWN:  return ALT_DOWN;
+				case KEY_HOME:  return ALT_HOME;
+				case KEY_END:   return ALT_END;
 				case KEY_PPAGE: return ALT_PAGEUP;
 				case KEY_NPAGE: return ALT_PAGEDOWN;
 				case KEY_DC:    return ALT_DELETE;
-- 
2.42.1