grid: Add up/down/right/left bisection (#246)

Author: Alan Morgan

src/config.c

@@ -76,6 +76,10 @@ static struct {
 	{ "grid_left", "a", "Move the grid left.", OPT_KEY },
 	{ "grid_down", "s", "Move the grid down.", OPT_KEY },
 	{ "grid_right", "d", "Move the grid right.", OPT_KEY },
+	{ "grid_cut_up", "W", "Cut the grid up.", OPT_KEY },
+	{ "grid_cut_left", "A", "Cut the grid left.", OPT_KEY },
+	{ "grid_cut_down", "S", "Cut the grid down.", OPT_KEY },
+	{ "grid_cut_right", "D", "Cut the grid right.", OPT_KEY },
 	{ "grid_keys", "u i j k", "A sequence of comma delimited keybindings which are ordered bookwise with respect to grid position.", OPT_KEY },
 	{ "grid_exit", "c", "Exit grid mode and return to normal mode.", OPT_KEY },
 

src/grid.c

@@ -103,6 +103,10 @@ struct input_event *grid_mode()
 		"grid_down",
 		"grid_right",
 		"grid_left",
+		"grid_cut_up",
+		"grid_cut_down",
+		"grid_cut_right",
+		"grid_cut_left",
 		"grid_keys",
 
 		"buttons",
@@ -145,6 +149,38 @@ struct input_event *grid_mode()
 			redraw(mx, my, 0);
 		}
 
+		if (config_input_match(ev, "grid_cut_up")) {
+			my -= grid_height/4;
+			grid_height /= 2;
+
+			platform->mouse_move(scr, mx, my);
+			redraw(mx, my, 0);
+		}
+
+		if (config_input_match(ev, "grid_cut_down")) {
+			my += grid_height/4;
+			grid_height /= 2;
+
+			platform->mouse_move(scr, mx, my);
+			redraw(mx, my, 0);
+		}
+
+		if (config_input_match(ev, "grid_cut_left")) {
+			mx -= grid_width/4;
+			grid_width /= 2;
+
+			platform->mouse_move(scr, mx, my);
+			redraw(mx, my, 0);
+		}
+
+		if (config_input_match(ev, "grid_cut_right")) {
+			mx += grid_width/4;
+			grid_width /= 2;
+
+			platform->mouse_move(scr, mx, my);
+			redraw(mx, my, 0);
+		}
+
 		if (config_input_match(ev, "buttons") ||
 			config_input_match(ev, "oneshot_buttons")) {
 			goto exit;