vis: restructure register handling

Decouple register content from cursors. Previously each cursor had
exactly one corresponding register. Now each register can save a
list of values whose lifetime is not tied to the cursor.

If multiple cursors exist and a put with a register holding only
a single value is performed, then this value is inserted at every
cursor location. If there are fewer values available than cursors,
then only the matching ones will be used. If a register holding
multiple values is inserted in a single cursor context, only the
first value will be used. Another option would be to join all
existing values. The details of this behavior might be changed
in the future.

<C-r> in insert mode has not yet been adapted and register handling
in general needs to be cleaned up further.

Fix #527

1 files changed, 1 insertions, 0 deletions

diff --git a/main.c b/main.c
index 9e7e9a3..8091c13 100644
--- a/main.c
+++ b/main.c
@@ -18,6 +18,7 @@
 #include "util.h"
 #include "libutf.h"
 #include "array.h"
+#include "buffer.h"
 
 #define PAGE      INT_MAX
 #define PAGE_HALF (INT_MAX-1)