api/buffer: add "on_bytes" callback to nvim_buf_attach

This implements byte-resolution updates of buffer changes.
Note: there is no promise that the buffer state is valid inside
the callback!

1 files changed, 13 insertions, 9 deletions

diff --git a/src/nvim/buffer_updates.c b/src/nvim/buffer_updates.c
index e6393bf02c..1e7cc8520f 100644
--- a/src/nvim/buffer_updates.c
+++ b/src/nvim/buffer_updates.c
@@ -2,6 +2,7 @@
 // it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
 
 #include "nvim/buffer_updates.h"
+#include "nvim/extmark.h"
 #include "nvim/memline.h"
 #include "nvim/api/private/helpers.h"
 #include "nvim/msgpack_rpc/channel.h"
@@ -282,9 +283,9 @@ void buf_updates_send_changes(buf_T *buf,
 }
 
 void buf_updates_send_splice(buf_T *buf,
-                             linenr_T start_line, colnr_T start_col,
-                             linenr_T oldextent_line, colnr_T oldextent_col,
-                             linenr_T newextent_line, colnr_T newextent_col)
+                             int start_row, colnr_T start_col, bcount_t start_byte,
+                             int old_row, colnr_T old_col, bcount_t old_byte,
+                             int new_row, colnr_T new_col, bcount_t new_byte)
 {
   if (!buf_updates_active(buf)) {
     return;
@@ -296,7 +297,7 @@ void buf_updates_send_splice(buf_T *buf,
     BufUpdateCallbacks cb = kv_A(buf->update_callbacks, i);
     bool keep = true;
     if (cb.on_bytes != LUA_NOREF) {
-      FIXED_TEMP_ARRAY(args, 8);
+      FIXED_TEMP_ARRAY(args, 11);
 
       // the first argument is always the buffer handle
       args.items[0] = BUFFER_OBJ(buf->handle);
@@ -304,12 +305,15 @@ void buf_updates_send_splice(buf_T *buf,
       // next argument is b:changedtick
       args.items[1] = INTEGER_OBJ(buf_get_changedtick(buf));
 
-      args.items[2] = INTEGER_OBJ(start_line);
+      args.items[2] = INTEGER_OBJ(start_row);
       args.items[3] = INTEGER_OBJ(start_col);
-      args.items[4] = INTEGER_OBJ(oldextent_line);
-      args.items[5] = INTEGER_OBJ(oldextent_col);
-      args.items[6] = INTEGER_OBJ(newextent_line);
-      args.items[7] = INTEGER_OBJ(newextent_col);
+      args.items[4] = INTEGER_OBJ(start_byte);
+      args.items[5] = INTEGER_OBJ(old_row);
+      args.items[6] = INTEGER_OBJ(old_col);
+      args.items[7] = INTEGER_OBJ(old_byte);
+      args.items[8] = INTEGER_OBJ(new_row);
+      args.items[9] = INTEGER_OBJ(new_col);
+      args.items[10] = INTEGER_OBJ(new_byte);
 
       textlock++;
       Object res = executor_exec_lua_cb(cb.on_bytes, "bytes", args, true, NULL);