Add TextYankPost and TextDeletePost autocmds

Reviewed by @watiko

Ported from de53ab72c8

runtime/doc/autocmd.txt

@@ -308,6 +308,9 @@ Name			triggered by ~
 |InsertCharPre|		when a character was typed in Insert mode, before
 			inserting it
 
+|TextDeletePost|	when some text is deleted (dw, dd, D)
+|TextYankPost|		when some text is yanked (yw, yd, Y)
+
 |TextChanged|		after a change was made to the text in Normal mode
 |TextChangedI|		after a change was made to the text in Insert mode
 
@@ -722,6 +725,24 @@ InsertCharPre			When a character is typed in Insert mode,
 				It is not allowed to change the text |textlock|.
 				The event is not triggered when 'paste' is
 				set.
+							*TextDeletePost*
+TextDeletePost			Just after a delete (|d|) command is issued.
+				Not issued if the black hole register
+				(|quote_|) is used. The affected text can be
+				accessed by several ways, through @"
+				(|quotequote| or |v:register|: >
+				  :echo @"
+				  :echo eval('@' . v:register)
+<
+							*TextYankPost*
+TextYankPost			Just after a |yank| (|y|) command is issued.
+				Not issued if the black hole register
+				(|quote_|) is used. The affected text can be
+				accessed by several ways, through @"
+				(|quotequote| or |v:register|: >
+				  :echo @"
+				  :echo eval('@' . v:register)
+<
 							*InsertEnter*
 InsertEnter			Just before starting Insert mode.  Also for
 				Replace mode and Virtual Replace mode.  The

src/nvim/auevents.lua

@@ -83,6 +83,8 @@ return {
     'TermResponse',           -- after setting "v:termresponse"
     'TextChanged',            -- text was modified
     'TextChangedI',           -- text was modified in Insert mode
+    'TextDeletePost',         -- after a delete command was done (dd, dw, D)
+    'TextYankPost',           -- after a yank command was done (yy, yw, Y)
     'User',                   -- user defined autocommand
     'VimEnter',               -- after starting Vim
     'VimLeave',               -- before exiting Vim

src/nvim/ops.c

@@ -19,6 +19,7 @@
 #include "nvim/ex_cmds.h"
 #include "nvim/ex_cmds2.h"
 #include "nvim/ex_getln.h"
+#include "nvim/fileio.h"
 #include "nvim/fold.h"
 #include "nvim/getchar.h"
 #include "nvim/indent.h"
@@ -1585,6 +1586,10 @@ int op_delete(oparg_T *oap)
 
   msgmore(curbuf->b_ml.ml_line_count - old_lcount);
 
+  textlock++;
+  apply_autocmds(EVENT_TEXTDELETEPOST, NULL, NULL, false, curbuf);
+  textlock--;
+
 setmarks:
   if (oap->motion_type == MBLOCK) {
     curbuf->b_op_end.lnum = oap->end.lnum;
@@ -2309,6 +2314,13 @@ bool op_yank(oparg_T *oap, bool message)
   yankreg_T *reg = get_yank_register(oap->regname, YREG_YANK);
   op_yank_reg(oap, message, reg, is_append_register(oap->regname));
   set_clipboard(oap->regname, reg);
+
+  if (message) {
+    textlock++;
+    apply_autocmds(EVENT_TEXTYANKPOST, NULL, NULL, false, curbuf);
+    textlock--;
+  }
+
   return true;
 }
 

test/functional/autocmd/text_deletepost.lua

@@ -0,0 +1,27 @@
+local helpers = require('test.functional.helpers')
+local clear, eval, eq = helpers.clear, helpers.eval, helpers.eq
+local feed, execute = helpers.feed, helpers.execute
+
+
+describe('TextDeletePost', function()
+    before_each(function()
+        clear()
+    end)
+
+    describe('au TextDeletePost', function()
+        it('is executed after delete', function()
+            feed('ifoo<ESC>')
+            execute('let g:foo = 0')
+            execute('autocmd! TextDeletePost * let g:foo = 1')
+            feed('dd')
+            eq(1, eval('g:foo'))
+        end)
+        it('is not executed after yank', function()
+            feed('ifoo<ESC>')
+            execute('let g:foo = 0')
+            execute('autocmd! TextDeletePost * let g:foo = 1')
+            feed('yy')
+            eq(0, eval('g:foo'))
+        end)
+    end)
+end)

test/functional/autocmd/text_yankpost.lua

@@ -0,0 +1,27 @@
+local helpers = require('test.functional.helpers')
+local clear, eval, eq = helpers.clear, helpers.eval, helpers.eq
+local feed, execute = helpers.feed, helpers.execute
+
+
+describe('TextYankPost', function()
+    before_each(function()
+        clear()
+    end)
+
+    describe('autocmd TextYankPost', function()
+        it('is executed after yank', function()
+            feed('ifoo<ESC>')
+            execute('let g:foo = 0')
+            execute('autocmd! TextYankPost * let g:foo = 1')
+            feed('yy')
+            eq(1, eval('g:foo'))
+        end)
+        it('is not executed after delete', function()
+            feed('ifoo<ESC>')
+            execute('let g:foo = 0')
+            execute('autocmd! TextYankPost * let g:foo = 1')
+            feed('dd')
+            eq(0, eval('g:foo'))
+        end)
+    end)
+end)