Implement modes. Modes allow you to use different keybindings and switch between them.

For example, you can create a mode which will let you resize windows
with some easy to use keys. So, instead of binding a combination
of your homerow and modifiers to resize, like this:

	bind Mod4+44 resize right +10
	bind Mod4+45 resize right -10
	...

You can instead define a new mode:

	mode "resize" {
		bind 44 resize right +10
		bind 45 resize right -10
		...
		bind 36 mode default
	}

	bindsym Mod4+r mode resize

So, if you press Mod4+r now, your keybindings will be set to the ones
defined in your resize mode above. You can then use your homerow
(without any other modifier) to resize the current column/row and
press enter to go back to the default mode when you are done.

Note that using this option requires you to enable the new lexer/parser
by passing the -l flag to i3 when starting.

include/config.h

@@ -21,6 +21,7 @@
 typedef struct Config Config;
 extern Config config;
 extern bool config_use_lexer;
+extern SLIST_HEAD(modes_head, Mode) modes;
 
 /**
  * Part of the struct Config. It makes sense to group colors for background,
@@ -46,6 +47,19 @@ struct Variable {
         SLIST_ENTRY(Variable) variables;
 };
 
+/**
+ * The configuration file can contain multiple sets of bindings. Apart from the
+ * default set (name == "default"), you can specify other sets and change the
+ * currently active set of bindings by using the "mode <name>" command.
+ *
+ */
+struct Mode {
+        char *name;
+        struct bindings_head *bindings;
+
+        SLIST_ENTRY(Mode) modes;
+};
+
 /**
  * Holds part of the configuration (the part which is not already in dedicated
  * structures in include/data.h).
@@ -97,4 +111,10 @@ void ungrab_all_keys(xcb_connection_t *conn);
  */
 void grab_all_keys(xcb_connection_t *conn);
 
+/**
+ * Switches the key bindings to the given mode, if the mode exists
+ *
+ */
+void switch_mode(xcb_connection_t *conn, const char *new_mode);
+
 #endif