Add mode keys to move the cursor to the top, middle and bottom of the screen.

H/M/L in vi mode and M-R/M-r in emacs (bottom of screen not bound in emacs).

mode-key.c

@@ -77,6 +77,7 @@ struct mode_key_cmdstr mode_key_cmdstr_choice[] = {
 /* Copy keys command strings. */
 struct mode_key_cmdstr mode_key_cmdstr_copy[] = {
 	{ MODEKEYCOPY_BACKTOINDENTATION, "back-to-indentation" },
+	{ MODEKEYCOPY_BOTTOMLINE, "bottom-line" },
 	{ MODEKEYCOPY_CANCEL, "cancel" },
 	{ MODEKEYCOPY_CLEARSELECTION, "clear-selection" },
 	{ MODEKEYCOPY_COPYSELECTION, "copy-selection" },
@@ -84,6 +85,7 @@ struct mode_key_cmdstr mode_key_cmdstr_copy[] = {
 	{ MODEKEYCOPY_ENDOFLINE, "end-of-line" },
 	{ MODEKEYCOPY_GOTOLINE, "goto-line" },
 	{ MODEKEYCOPY_LEFT, "cursor-left" },
+	{ MODEKEYCOPY_MIDDLELINE, "middle-line" },
 	{ MODEKEYCOPY_NEXTPAGE, "page-down" },
 	{ MODEKEYCOPY_NEXTWORD, "next-word" },
 	{ MODEKEYCOPY_PREVIOUSPAGE, "page-up" },
@@ -96,6 +98,7 @@ struct mode_key_cmdstr mode_key_cmdstr_copy[] = {
 	{ MODEKEYCOPY_SEARCHUP, "search-backward" },
 	{ MODEKEYCOPY_STARTOFLINE, "start-of-line" },
 	{ MODEKEYCOPY_STARTSELECTION, "begin-selection" },
+	{ MODEKEYCOPY_TOPLINE, "top-line" },
 	{ MODEKEYCOPY_UP, "cursor-up" },
 
 	{ 0, NULL }
@@ -161,8 +164,11 @@ const struct mode_key_entry mode_key_vi_copy[] = {
 	{ '0',			0, MODEKEYCOPY_STARTOFLINE },
 	{ ':',			0, MODEKEYCOPY_GOTOLINE },
 	{ '?',			0, MODEKEYCOPY_SEARCHUP },
+	{ 'H',			0, MODEKEYCOPY_TOPLINE },
 	{ 'J',			0, MODEKEYCOPY_SCROLLDOWN },
 	{ 'K',			0, MODEKEYCOPY_SCROLLUP },
+	{ 'L',			0, MODEKEYCOPY_BOTTOMLINE },
+	{ 'M',			0, MODEKEYCOPY_MIDDLELINE },
 	{ '\002' /* C-b */,	0, MODEKEYCOPY_PREVIOUSPAGE },
 	{ '\003' /* C-c */,	0, MODEKEYCOPY_CANCEL },
 	{ '\004' /* C-d */,	0, MODEKEYCOPY_HALFPAGEDOWN },
@@ -266,6 +272,8 @@ const struct mode_key_entry mode_key_emacs_copy[] = {
 	{ 'm' | KEYC_ESCAPE,	0, MODEKEYCOPY_BACKTOINDENTATION },
 	{ 'n',			0, MODEKEYCOPY_SEARCHAGAIN },
 	{ 'q',			0, MODEKEYCOPY_CANCEL },
+	{ 'r' | KEYC_ESCAPE,	0, MODEKEYCOPY_MIDDLELINE },
+	{ 'R' | KEYC_ESCAPE,	0, MODEKEYCOPY_TOPLINE },
 	{ 'v' | KEYC_ESCAPE,	0, MODEKEYCOPY_PREVIOUSPAGE },
 	{ 'w' | KEYC_ESCAPE,	0, MODEKEYCOPY_COPYSELECTION },
 	{ KEYC_DOWN | KEYC_CTRL,0, MODEKEYCOPY_SCROLLDOWN },

tmux.1

@@ -538,6 +538,9 @@ The following keys are supported as appropriate for the mode:
 .It Li "Start of line" Ta "0" Ta "C-a"
 .It Li "Start selection" Ta "Space" Ta "C-Space"
 .It Li "Transpose chars" Ta "" Ta "C-t"
+.It Li "Cursor to top line" Ta "H" Ta "M-R"
+.It Li "Cursor to middle line" Ta "M" Ta "M-r"
+.It Li "Cursor to bottom line" Ta "L" Ta ""
 .El
 .Pp
 These key bindings are defined in a set of named tables:

tmux.h

@@ -397,6 +397,7 @@ enum mode_key_cmd {
 
 	/* Copy keys. */
 	MODEKEYCOPY_BACKTOINDENTATION,
+	MODEKEYCOPY_BOTTOMLINE,
 	MODEKEYCOPY_CANCEL,
 	MODEKEYCOPY_CLEARSELECTION,
 	MODEKEYCOPY_COPYSELECTION,
@@ -406,6 +407,7 @@ enum mode_key_cmd {
 	MODEKEYCOPY_HALFPAGEDOWN,
 	MODEKEYCOPY_HALFPAGEUP,
 	MODEKEYCOPY_LEFT,
+	MODEKEYCOPY_MIDDLELINE,
 	MODEKEYCOPY_NEXTPAGE,
 	MODEKEYCOPY_NEXTWORD,
 	MODEKEYCOPY_PREVIOUSPAGE,
@@ -418,6 +420,7 @@ enum mode_key_cmd {
 	MODEKEYCOPY_SEARCHUP,
 	MODEKEYCOPY_STARTOFLINE,
 	MODEKEYCOPY_STARTSELECTION,
+	MODEKEYCOPY_TOPLINE,
 	MODEKEYCOPY_UP,
 };
 

window-copy.c

@@ -278,6 +278,24 @@ window_copy_key(struct window_pane *wp, struct client *c, int key)
 		window_copy_update_selection(wp);
 		window_copy_redraw_screen(wp);
 		break;
+	case MODEKEYCOPY_TOPLINE:
+		data->cx = 0;
+		data->cy = 0;
+		window_copy_update_selection(wp);
+		window_copy_redraw_screen(wp);
+		break;
+	case MODEKEYCOPY_MIDDLELINE:
+		data->cx = 0;
+		data->cy = (screen_size_y(s) - 1) / 2;
+		window_copy_update_selection(wp);
+		window_copy_redraw_screen(wp);
+		break;
+	case MODEKEYCOPY_BOTTOMLINE:
+		data->cx = 0;
+		data->cy = screen_size_y(s) - 1;
+		window_copy_update_selection(wp);
+		window_copy_redraw_screen(wp);
+		break;
 	case MODEKEYCOPY_STARTSELECTION:
  		window_copy_start_selection(wp);
 		window_copy_redraw_screen(wp);