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, 13 insertions, 4 deletions

diff --git a/register.h b/register.h
index a815a90..379da87 100644
--- a/register.h
+++ b/register.h
@@ -4,11 +4,11 @@
 #include <stddef.h>
 #include <stdbool.h>
 #include "vis.h"
-#include "buffer.h"
+#include "array.h"
 #include "text-util.h"
 
 typedef struct {
-	Buffer buf;
+	Array values;
 	bool linewise; /* place register content on a new line when inserting? */
 	bool append;
 	enum {
@@ -18,11 +18,20 @@ typedef struct {
 	} type;
 } Register;
 
+bool register_init(Register*);
 void register_release(Register*);
+
 const char *register_get(Vis*, Register*, size_t *len);
-bool register_put(Vis*, Register*, const char *data, size_t len);
+const char *register_slot_get(Vis*, Register*, size_t slot, size_t *len);
+
 bool register_put0(Vis*, Register*, const char *data);
+bool register_put(Vis*, Register*, const char *data, size_t len);
+bool register_slot_put(Vis*, Register*, size_t slot, const char *data, size_t len);
+
 bool register_put_range(Vis*, Register*, Text*, Filerange*);
-bool register_append_range(Register*, Text*, Filerange*);
+bool register_slot_put_range(Vis*, Register*, size_t slot, Text*, Filerange*);
+
+size_t register_count(Register*);
+bool register_resize(Register*, size_t count);
 
 #endif