vis: add rudimentary support for key aliases

This will eventually be exposed via a :map style command.

2 files changed, 10 insertions, 4 deletions

diff --git a/editor.h b/editor.h
index 3b555bf..7719f3d 100644
--- a/editor.h
+++ b/editor.h
@@ -33,6 +33,7 @@ typedef struct {
 	/* returns a pointer to the first not consumed character in keys
 	 * or NULL if not enough input was available to complete the command */
 	const Arg arg;
+	const char *alias;
 } KeyBinding;
 
 typedef struct Mode Mode;
diff --git a/vis.c b/vis.c
index 72889ab..9e397c4 100644
--- a/vis.c
+++ b/vis.c
@@ -2625,10 +2625,15 @@ static const char *keypress(const char *input) {
 		*end = tmp;
 		
 		if (binding) { /* exact match */
-			end = (char*)binding->func(end, &binding->arg);
-			if (!end)
-				break;
-			start = cur = end;
+			if (binding->func) {
+				end = (char*)binding->func(end, &binding->arg);
+				if (!end)
+					break;
+				start = cur = end;
+			} else { /* alias */
+				buffer_put0(&vis->input_queue, end);
+				buffer_prepend0(&vis->input_queue, binding->alias);
+			}
 		} else if (prefix) { /* incomplete key binding? */
 			cur = end;
 		} else { /* no keybinding */