vis: introduce special keys which allow mappings to editor actions

Key bindings in vis are always recursive, hence mapping ~
to ~l will cause an infinite loop.

Instead vis supports special editor "keys" which map to
internal editor functions.

As an example one can thus map ~ to <vis-operator-case-swap>l
or even <vis-operator-case-swap><cursor-char-next>

Furthermore this makes it possible to completely unmap core
editor features such as operators, the corresponding funtionality
is still available via its corresponding special key.

1 files changed, 3 insertions, 0 deletions

diff --git a/editor.h b/editor.h
index 87d9aeb..e7b5f0a 100644
--- a/editor.h
+++ b/editor.h
@@ -253,6 +253,7 @@ struct Editor {
 	volatile sig_atomic_t cancel_filter; /* abort external command */
 	volatile sig_atomic_t sigbus;
 	sigjmp_buf sigbus_jmpbuf;
+	Map *actions;          /* built in special editor keys / commands */
 };
 
 Editor *editor_new(Ui*);
@@ -266,6 +267,8 @@ bool editor_mode_bindings(Mode*, KeyBinding**);
 bool editor_mode_map(Mode*, const char *name, KeyBinding*);
 bool editor_mode_unmap(Mode*, const char *name);
 
+bool editor_action_register(Editor*, KeyAction*);
+
 /* these function operate on the currently focused window but make sure
  * that all windows which show the affected region are redrawn too. */
 void editor_insert_key(Editor*, const char *data, size_t len);