docs: update version.c

Problem:
All of Nvim’s threads are clamped to the Default QoS class. This means
that Nvim is forced to compete for CPU time with compilers and other
batch work, and is even prioritized beneath user-initiated work in GUI
apps like e.g. file imports. This significantly harms responsiveness.

Solution:
Tell the kernel that the Nvim process takes part in rendering a UI.

Implementation:
Remove the process-wide QoS clamp. This doesn’t directly do anything to
the main thread, but rather has the side-effect of letting the main
thread run at its actual QoS (User Interactive QoS).

runtime/doc/cmdline.txt

@@ -142,13 +142,16 @@ CTRL-R {register}					*c_CTRL-R* *c_<C-R>*
 		typing CTRL-R and the second character '"' will be displayed
 		to indicate that you are expected to enter the name of a
 		register.
-		The text is inserted as if you typed it, but mappings and
-		abbreviations are not used.  Command-line completion through
-		'wildchar' is not triggered though.  And characters that end
-		the command line are inserted literally (<Esc>, <CR>, <NL>,
-		<C-C>).  A <BS> or CTRL-W could still end the command line
-		though, and remaining characters will then be interpreted in
-		another mode, which might not be what you intended.
+		When used with named or clipboard registers (A-Z,a-z,0-9,+)
+		text is inserted literally like pasting with "p". For other
+		registers, the text is inserted as if you typed it, but
+		mappings and abbreviations are not used. Command-line
+		completion through 'wildchar' is not triggered though.  And
+		characters that end the command line are inserted literally
+		(<Esc>, <CR>, <NL>, <C-C>).  A <BS> or CTRL-W could still end
+		the command line though, and remaining characters will then be
+		interpreted in another mode, which might not be what you
+		intended.
 		Special registers:
 			'"'	the unnamed register, containing the text of
 				the last delete or yank
@@ -176,7 +179,9 @@ CTRL-R {register}					*c_CTRL-R* *c_<C-R>*
 				sure the expression evaluates to an empty
 				string.  E.g.: >
 					<C-R><C-R>=setcmdpos(2)[-1]<CR>
-<		See |registers| about registers.
+<				You can use this to insert a register as
+				typed with CTRL-R =@reg.
+		See |registers| about registers.
 		Implementation detail: When using the |expression| register
 		and invoking setcmdpos(), this sets the position before
 		inserting the resulting string.  Use CTRL-R CTRL-R to set the

runtime/doc/insert.txt

@@ -101,14 +101,17 @@ CTRL-N		Find next keyword (see |i_CTRL-N|).
 CTRL-P		Find previous keyword (see |i_CTRL-P|).
 
 CTRL-R {register}				*i_CTRL-R*
-		Insert the contents of a register.  Between typing CTRL-R and
+		Insert the contents of a register. Between typing CTRL-R and
 		the second character, '"' will be displayed to indicate that
-		you are expected to enter the name of a register.
-		The text is inserted as if you typed it, but mappings and
-		abbreviations are not used.  If you have options like
-		'textwidth', 'formatoptions', or 'autoindent' set, this will
-		influence what will be inserted.  This is different from what
-		happens with the "p" command and pasting with the mouse.
+		you are expected to enter the name of a register. When used
+		with When used with named or clipboard registers
+		(A-Z,a-z,0-9,+) text is inserted literally like pasting with
+		"p". For other registers, the text is inserted as if you typed
+		it, but mappings and abbreviations are not used.  If you have
+		options like 'textwidth', 'formatoptions', or 'autoindent'
+		set, this will influence what will be inserted. This is
+		different from what happens with the "p" command and pasting
+		with the mouse.
 		Special registers:
 			'"'	the unnamed register, containing the text of
 				the last delete or yank
@@ -131,6 +134,8 @@ CTRL-R {register}				*i_CTRL-R*
 				special keys.  E.g., you can use this to move
 				the cursor up:
 					CTRL-R ="\<Up>"
+				you can use this to insert a register as
+				typed with CTRL-R =@reg.
 				Use CTRL-R CTRL-R to insert text literally.
 				When the result is a |List| the items are used
 				as lines.  They can have line breaks inside

runtime/doc/news.txt

@@ -68,7 +68,8 @@ DIAGNOSTICS
 
 EDITOR
 
-• todo
+• |i_CTRL-R| inserts named registers (A-Z,a-z,0-9) literally like pasting instead of
+  as typed. To get the old behavior you can use `<C-R>=@x`.
 
 EVENTS
 

runtime/doc/spell.txt

@@ -649,11 +649,11 @@ ask you where to write the file (there must be a writable directory in
 'runtimepath' for this).
 
 The plugin has a default place where to look for spell files, on the Vim ftp
-server.  The protocol used is SSL (https://) for security.  If you want to use
-another location or another protocol, set the g:spellfile_URL variable to the
-directory that holds the spell files.  You can use http:// or ftp://, but you
-are taking a security risk then.  The |netrw| plugin is used for getting the
-file, look there for the specific syntax of the URL.  Example: >
+server.  The protocol used is TLS (`https://`) for security.  If you want to
+use another location or another protocol, set the g:spellfile_URL variable to
+the directory that holds the spell files.  You can use `http://` or `ftp://`,
+but you are taking a security risk then.  The |netrw| plugin is used for
+getting the file, look there for the specific syntax of the URL.  Example: >
 	let g:spellfile_URL = 'https://ftp.nluug.nl/vim/runtime/spell'
 You may need to escape special characters.
 

runtime/doc/usr_23.txt

@@ -136,10 +136,10 @@ might want to try the manual way of downloading the file.
 Accessing files over the internet works with the netrw plugin.  Currently URLs
 with these formats are recognized:
 
-	ftp://		uses ftp
-	rcp://		uses rcp
-	scp://		uses scp
-	http://		uses wget (reading only)
+	`ftp://`	uses ftp
+	`rcp://`	uses rcp
+	`scp://`	uses scp
+	`http://`	uses wget (reading only)
 
 Vim doesn't do the communication itself, it relies on the mentioned programs
 to be available on your computer.  On most Unix systems "ftp" and "rcp" will
@@ -147,7 +147,7 @@ be present.  "scp" and "wget" might need to be installed.
 
 Vim detects these URLs for each command that starts editing a new file, also
 with ":edit" and ":split", for example.  Write commands also work, except for
-http://.
+`http://`.
 
 For more information, also about passwords, see |netrw|.
 

runtime/doc/vim_diff.txt

@@ -316,6 +316,8 @@ Commands:
 Editor:
 - |prompt-buffer| supports multiline input/paste, undo/redo, and o/O normal
   commands.
+- |i_CTRL-R| inserts named registers (A-Z,a-z,0-9) literally like pasting instead of
+  as typed. To get the old behavior you can use `<C-R>=@x`.
 
 Events (autocommands):
 - Fixed inconsistent behavior in execution of nested autocommands #23368

src/nvim/edit.c

@@ -2854,6 +2854,8 @@ static void ins_reg(void)
     vim_beep(kOptBoFlagRegister);
     need_redraw = true;  // remove the '"'
   } else {
+    yankreg_T *reg = get_yank_register(regname, YREG_PASTE);
+
     if (literally == Ctrl_O || literally == Ctrl_P) {
       // Append the command to the redo buffer.
       AppendCharToRedobuff(Ctrl_R);
@@ -2862,7 +2864,11 @@ static void ins_reg(void)
 
       do_put(regname, NULL, BACKWARD, 1,
              (literally == Ctrl_P ? PUT_FIXINDENT : 0) | PUT_CURSEND);
-    } else if (insert_reg(regname, NULL, literally) == FAIL) {
+    } else if (reg->y_size > 1 && is_literal_register(regname)) {
+      AppendCharToRedobuff(Ctrl_R);
+      AppendCharToRedobuff(regname);
+      do_put(regname, NULL, BACKWARD, 1, PUT_CURSEND);
+    } else if (insert_reg(regname, NULL, !!literally) == FAIL) {
       vim_beep(kOptBoFlagRegister);
       need_redraw = true;  // remove the '"'
     } else if (stop_insert_mode) {

src/nvim/main.c

@@ -188,6 +188,7 @@ static bool event_teardown(void)
 /// Needed for unit tests.
 void early_init(mparm_T *paramp)
 {
+  os_hint_priority();
   estack_init();
   cmdline_init();
   eval_init();          // init global variables

src/nvim/ops.h

@@ -152,7 +152,7 @@ static inline int op_reg_index(const int regname)
 static inline bool is_literal_register(const int regname)
   FUNC_ATTR_CONST
 {
-  return regname == '*' || regname == '+';
+  return regname == '*' || regname == '+' || ASCII_ISALNUM(regname);
 }
 
 EXTERN LuaRef repeat_luaref INIT( = LUA_NOREF);  ///< LuaRef for "."

src/nvim/os/env.c

@@ -39,6 +39,10 @@
 # include "nvim/fileio.h"
 #endif
 
+#ifdef __APPLE__
+# include <mach/task.h>
+#endif
+
 #ifdef HAVE__NSGETENVIRON
 # include <crt_externs.h>
 #endif
@@ -367,6 +371,18 @@ int64_t os_get_pid(void)
 #endif
 }
 
+/// Signals to the OS that Nvim is an application for "interactive work"
+/// which should be prioritized similar to a GUI app.
+void os_hint_priority(void)
+{
+#ifdef __APPLE__
+  // By default, processes have the TASK_UNSPECIFIED "role", which means all of its threads are
+  // clamped to Default QoS. Setting the role to TASK_DEFAULT_APPLICATION removes this clamp.
+  integer_t policy = TASK_DEFAULT_APPLICATION;
+  task_policy_set(mach_task_self(), TASK_CATEGORY_POLICY, &policy, 1);
+#endif
+}
+
 /// Gets the hostname of the current machine.
 ///
 /// @param hostname   Buffer to store the hostname.

src/nvim/ui_compositor.c

@@ -335,7 +335,8 @@ ScreenGrid *ui_comp_get_grid_at_coord(int row, int col)
   FOR_ALL_WINDOWS_IN_TAB(wp, curtab) {
     ScreenGrid *grid = &wp->w_grid_alloc;
     if (row >= grid->comp_row && row < grid->comp_row + grid->rows
-        && col >= grid->comp_col && col < grid->comp_col + grid->cols) {
+        && col >= grid->comp_col && col < grid->comp_col + grid->cols
+        && !wp->w_config.hide) {
       return grid;
     }
   }

src/nvim/version.c

@@ -61,7 +61,7 @@ static const int included_patches[] = {
   2423,
   2422,
   2421,
-  // 2420,
+  2420,
   2419,
   // 2418,
   2417,
@@ -147,7 +147,7 @@ static const int included_patches[] = {
   2337,
   2336,
   2335,
-  // 2334,
+  2334,
   2333,
   2332,
   2331,
@@ -174,14 +174,14 @@ static const int included_patches[] = {
   2310,
   2309,
   2308,
-  // 2307,
+  2307,
   2306,
   2305,
   2304,
   2303,
   2302,
   2301,
-  // 2300,
+  2300,
   2299,
   2298,
   2297,
@@ -193,9 +193,9 @@ static const int included_patches[] = {
   2291,
   2290,
   2289,
-  // 2288,
-  // 2287,
-  // 2286,
+  2288,
+  2287,
+  2286,
   2285,
   2284,
   2283,
@@ -204,7 +204,7 @@ static const int included_patches[] = {
   2280,
   // 2279,
   2278,
-  // 2277,
+  2277,
   2276,
   2275,
   2274,
@@ -241,7 +241,7 @@ static const int included_patches[] = {
   2243,
   2242,
   // 2241,
-  // 2240,
+  2240,
   2239,
   2238,
   2237,
@@ -268,10 +268,10 @@ static const int included_patches[] = {
   2216,
   2215,
   2214,
-  // 2213,
+  2213,
   2212,
   2211,
-  // 2210,
+  2210,
   2209,
   // 2208,
   2207,
@@ -317,7 +317,7 @@ static const int included_patches[] = {
   2167,
   2166,
   2165,
-  // 2164,
+  2164,
   2163,
   2162,
   2161,
@@ -367,12 +367,12 @@ static const int included_patches[] = {
   2117,
   2116,
   2115,
-  // 2114,
+  2114,
   2113,
   2112,
   2111,
-  // 2110,
-  // 2109,
+  2110,
+  2109,
   2108,
   2107,
   2106,
@@ -449,7 +449,7 @@ static const int included_patches[] = {
   2035,
   2034,
   2033,
-  // 2032,
+  2032,
   2031,
   2030,
   2029,
@@ -472,7 +472,7 @@ static const int included_patches[] = {
   2012,
   2011,
   2010,
-  // 2009,
+  2009,
   2008,
   2007,
   2006,
@@ -483,8 +483,8 @@ static const int included_patches[] = {
   2001,
   2000,
   // 1999,
-  // 1998,
-  // 1997,
+  1998,
+  1997,
   // 1996,
   1995,
   1994,
@@ -518,11 +518,11 @@ static const int included_patches[] = {
   1966,
   1965,
   // 1964,
-  // 1963,
+  1963,
   1962,
   1961,
   1960,
-  // 1959,
+  1959,
   1958,
   // 1957,
   1956,
@@ -536,7 +536,7 @@ static const int included_patches[] = {
   1948,
   1947,
   1946,
-  // 1945,
+  1945,
   // 1944,
   // 1943,
   1942,
@@ -545,14 +545,14 @@ static const int included_patches[] = {
   // 1939,
   1938,
   1937,
-  // 1936,
+  1936,
   1935,
-  // 1934,
+  1934,
   1933,
   1932,
   1931,
   1930,
-  // 1929,
+  1929,
   // 1928,
   1927,
   1926,
@@ -563,8 +563,8 @@ static const int included_patches[] = {
   1921,
   // 1920,
   // 1919,
-  // 1918,
-  // 1917,
+  1918,
+  1917,
   1916,
   1915,
   1914,
@@ -574,12 +574,12 @@ static const int included_patches[] = {
   1910,
   1909,
   // 1908,
-  // 1907,
+  1907,
   // 1906,
   // 1905,
   // 1904,
   1903,
-  // 1902,
+  1902,
   1901,
   1900,
   1899,
@@ -607,7 +607,7 @@ static const int included_patches[] = {
   1877,
   1876,
   1875,
-  // 1874,
+  1874,
   1873,
   1872,
   1871,
@@ -631,12 +631,12 @@ static const int included_patches[] = {
   1853,
   1852,
   // 1851,
-  // 1850,
+  1850,
   1849,
   1848,
   1847,
   1846,
-  // 1845,
+  1845,
   1844,
   1843,
   1842,
@@ -667,7 +667,7 @@ static const int included_patches[] = {
   1817,
   1816,
   1815,
-  // 1814,
+  1814,
   // 1813,
   1812,
   // 1811,
@@ -692,28 +692,28 @@ static const int included_patches[] = {
   1792,
   1791,
   1790,
-  // 1789,
+  1789,
   1788,
   // 1787,
-  // 1786,
+  1786,
   1785,
   // 1784,
   1783,
   1782,
   1781,
   1780,
-  // 1779,
-  // 1778,
+  1779,
+  1778,
   1777,
   1776,
   1775,
   1774,
-  // 1773,
+  1773,
   1772,
   1771,
   // 1770,
   1769,
-  // 1768,
+  1768,
   1767,
   1766,
   1765,
@@ -726,10 +726,10 @@ static const int included_patches[] = {
   1758,
   1757,
   1756,
-  // 1755,
-  // 1754,
-  // 1753,
-  // 1752,
+  1755,
+  1754,
+  1753,
+  1752,
   // 1751,
   1750,
   1749,
@@ -748,7 +748,7 @@ static const int included_patches[] = {
   1736,
   1735,
   1734,
-  // 1733,
+  1733,
   1732,
   1731,
   1730,
@@ -762,7 +762,7 @@ static const int included_patches[] = {
   1722,
   1721,
   1720,
-  // 1719,
+  1719,
   // 1718,
   1717,
   1716,
@@ -772,9 +772,9 @@ static const int included_patches[] = {
   1712,
   1711,
   1710,
-  // 1709,
+  1709,
   1708,
-  // 1707,
+  1707,
   1706,
   1705,
   1704,
@@ -803,9 +803,9 @@ static const int included_patches[] = {
   1681,
   1680,
   1679,
-  // 1678,
+  1678,
   1677,
-  // 1676,
+  1676,
   1675,
   1674,
   // 1673,
@@ -815,8 +815,8 @@ static const int included_patches[] = {
   1669,
   1668,
   1667,
-  // 1666,
-  // 1665,
+  1666,
+  1665,
   1664,
   1663,
   1662,
@@ -825,17 +825,17 @@ static const int included_patches[] = {
   // 1659,
   1658,
   1657,
-  // 1656,
+  1656,
   1655,
   1654,
   1653,
   1652,
   1651,
   1650,
-  // 1649,
+  1649,
   1648,
   1647,
-  // 1646,
+  1646,
   1645,
   1644,
   1643,
@@ -845,7 +845,7 @@ static const int included_patches[] = {
   1639,
   1638,
   1637,
-  // 1636,
+  1636,
   1635,
   1634,
   1633,
@@ -859,14 +859,14 @@ static const int included_patches[] = {
   1625,
   1624,
   1623,
-  // 1622,
+  1622,
   1621,
-  // 1620,
+  1620,
   1619,
   1618,
-  // 1617,
+  1617,
   1616,
-  // 1615,
+  1615,
   1614,
   1613,
   // 1612,
@@ -879,13 +879,13 @@ static const int included_patches[] = {
   1605,
   1604,
   1603,
-  // 1602,
+  1602,
   1601,
   // 1600,
   1599,
   1598,
   // 1597,
-  // 1596,
+  1596,
   1595,
   1594,
   1593,
@@ -919,7 +919,7 @@ static const int included_patches[] = {
   1565,
   1564,
   1563,
-  // 1562,
+  1562,
   // 1561,
   // 1560,
   // 1559,
@@ -931,7 +931,7 @@ static const int included_patches[] = {
   // 1553,
   1552,
   1551,
-  // 1550,
+  1550,
   1549,
   // 1548,
   1547,
@@ -954,7 +954,7 @@ static const int included_patches[] = {
   1530,
   1529,
   1528,
-  // 1527,
+  1527,
   1526,
   // 1525,
   1524,
@@ -1398,7 +1398,7 @@ static const int included_patches[] = {
   1086,
   1085,
   1084,
-  // 1083,
+  1083,
   1082,
   1081,
   1080,

test/functional/editor/mode_insert_spec.lua

@@ -83,6 +83,36 @@ describe('insert-mode', function()
         {5:-- INSERT --}                                      |
       ]])
     end)
+
+    it('inserts named registers literally', function()
+      local screen = Screen.new(50, 6)
+      -- regular text without special charecter command
+      command('let @a = "test"')
+      feed('i<C-R>a<ESC>')
+      screen:expect([[
+        tes^t                                              |
+        {1:~                                                 }|*4
+                                                          |
+      ]])
+
+      -- text with backspace character gets written literally by default
+      command('let @a = "test\\<C-H>"')
+      feed('cc<C-R>a<ESC>')
+      screen:expect([[
+        test{18:^^H}                                            |
+        {1:~                                                 }|*4
+                                                          |
+      ]])
+
+      -- =@reg<CR> can be used to get effect of keypress
+      command('let @a = "test\\<C-H>"')
+      feed('cc<C-R>=@a<CR><ESC>')
+      screen:expect([[
+        te^s                                               |
+        {1:~                                                 }|*4
+                                                          |
+      ]])
+    end)
   end)
 
   describe('Ctrl-O', function()

test/functional/vimscript/screenchar_spec.lua

@@ -76,7 +76,39 @@ describe('screenchar() and family respect floating windows', function()
   describe('with ext_multigrid', function()
     with_ext_multigrid(true)
   end)
+
   describe('without ext_multigrid', function()
     with_ext_multigrid(false)
   end)
+
+  describe('hidden windows', function()
+    before_each(function()
+      clear()
+      Screen.new(40, 7, {})
+      api.nvim_buf_set_lines(0, 0, -1, true, { 'aaa', 'aaa' })
+    end)
+
+    local assert_screen_funcs = function()
+      eq('a', fn.screenstring(1, 1))
+      eq(97, fn.screenchar(1, 1))
+      eq({ 97 }, fn.screenchars(1, 1))
+      eq(fn.screenattr(2, 1), fn.screenattr(1, 1))
+    end
+
+    it('manual', function()
+      local bufnr = api.nvim_create_buf(false, true)
+      api.nvim_buf_set_lines(bufnr, 0, -1, true, { 'bb' })
+      local win_opts = { relative = 'editor', row = 0, col = 0, height = 1, width = 2, hide = true }
+      api.nvim_open_win(bufnr, false, win_opts)
+
+      assert_screen_funcs()
+    end)
+
+    it('from ui2', function()
+      n.exec_lua('require("vim._extui").enable({ enable = true })')
+      command('echo "foo"')
+
+      assert_screen_funcs()
+    end)
+  end)
 end)

test/old/testdir/test_autocmd.vim

@@ -2090,7 +2090,7 @@ func Test_Cmdline()
 
   let g:log = []
   let @r = 'abc'
-  call feedkeys(":0\<C-R>r1\<C-R>\<C-O>r2\<C-R>\<C-R>r3\<Esc>", 'xt')
+  call feedkeys(":0\<C-R>=@r\<CR>1\<C-R>\<C-O>r2\<C-R>\<C-R>r3\<Esc>", 'xt')
   call assert_equal([
         \ '0',
         \ '0a',

test/old/testdir/test_cmdline.vim

@@ -905,7 +905,7 @@ func Test_cmdline_paste()
 
   " Test for pasting register containing CTRL-H using CTRL-R and CTRL-R CTRL-R
   let @a = "xy\<C-H>z"
-  call feedkeys(":\"\<C-R>a\<CR>", 'xt')
+  call feedkeys(":\"\<C-R>=@a\<CR>\<CR>", 'xt')
   call assert_equal('"xz', @:)
   call feedkeys(":\"\<C-R>\<C-R>a\<CR>", 'xt')
   call assert_equal("\"xy\<C-H>z", @:)

test/old/testdir/test_ins_complete.vim

@@ -1523,7 +1523,7 @@ func Test_complete_reginsert()
   exe "normal Goa\<C-P>\<C-R>=\"\\<C-P>\"\<CR>"
   call assert_equal('a123', getline(5))
   let @r = "\<C-P>\<C-P>"
-  exe "normal GCa\<C-P>\<C-R>r"
+  exe "normal GCa\<C-P>\<C-R>=@r\<CR>"
   call assert_equal('a12', getline(5))
   exe "normal GCa\<C-P>\<C-R>=\"x\"\<CR>"
   call assert_equal('a1234x', getline(5))