Commit: patch 9.2.0110: No support for terminal synchronization mode
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Christian Brabandt
Mar 4, 2026, 4:16:58 PM (2 days ago) Mar 4
to vim...@googlegroups.com
patch 9.2.0110: No support for terminal synchronization mode
Commit: https://github.com/vim/vim/commit/7ba60f17c22ef81680f25f8c3225b4edb55ddd7c
Author: Foxe Chen <chen...@gmail.com>
Date: Wed Mar 4 20:52:25 2026 +0000
patch 9.2.0110: No support for terminal synchronization mode
Problem: No support for terminal synchronization mode
Solution: Add DEC 2026 support using the 'termsync' option
(Foxe Chen).
related: #11718
closes: #19541
Signed-off-by: Foxe Chen <chen...@gmail.com>
Signed-off-by: Christian Brabandt <c...@256bit.org>
diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index 327494d68..c7e010d59 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -1,4 +1,4 @@
-*options.txt* For Vim version 9.2. Last change: 2026 Mar 02
+*options.txt* For Vim version 9.2. Last change: 2026 Mar 04
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -9096,6 +9096,24 @@ A jump table for the options with a short description can be found at |Q_op|.
<
NOTE: This option is reset when 'compatible' is set.
+ *'termsync'* *'tsy'*
+'termsync' 'tsy' boolean (default off)
+ global
+ If the host terminal supports it, buffer all screen updates made
+ during a redraw cycle so that each screen is displayed in the terminal
+ all at once. This can prevent tearing or flickering when the terminal
+ updates faster than Vim can redraw. If the host terminal does not
+ support it or if Vim is running graphically, then this option does
+ nothing.
+
+ The specification can be found at:
+ https://github.com/contour-terminal/vt-extensions/blob/master/synchronized-output.md
+
+ Vim may set this option automatically at startup time when Vim is
+ compiled with the |+termresponse| feature, by querying the terminal
+ for DEC mode 2026 support. The terminal codes used are |t_BS| and
+ |t_ES|.
+
*'termwinkey'* *'twk'*
'termwinkey' 'twk' string (default "")
local to window
diff --git a/runtime/doc/quickref.txt b/runtime/doc/quickref.txt
index e7b2068b0..fd2775764 100644
--- a/runtime/doc/quickref.txt
+++ b/runtime/doc/quickref.txt
@@ -1,4 +1,4 @@
-*quickref.txt* For Vim version 9.2. Last change: 2026 Mar 02
+*quickref.txt* For Vim version 9.2. Last change: 2026 Mar 04
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -963,6 +963,7 @@ Short explanation of each option: *option-list*
'termbidi' 'tbidi' terminal takes care of bi-directionality
'termencoding' 'tenc' character encoding used by the terminal
'termguicolors' 'tgc' use GUI colors for the terminal
+'termsync' 'tsy' enable terminal sync mode for redraw
'termwinkey' 'twk' key that precedes a Vim command in a terminal
'termwinscroll' 'twsl' max number of scrollback lines in a terminal window
'termwinsize' 'tws' size of a terminal window
diff --git a/runtime/doc/tags b/runtime/doc/tags
index a881c0acf..a000eacbd 100644
--- a/runtime/doc/tags
+++ b/runtime/doc/tags
@@ -1071,6 +1071,7 @@ $quote eval.txt /*$quote*
't_AU' term.txt /*'t_AU'*
't_BD' term.txt /*'t_BD'*
't_BE' term.txt /*'t_BE'*
+'t_BS' term.txt /*'t_BS'*
't_CF' term.txt /*'t_CF'*
't_CS' term.txt /*'t_CS'*
't_CV' term.txt /*'t_CV'*
@@ -1081,6 +1082,7 @@ $quote eval.txt /*$quote*
't_Ds' term.txt /*'t_Ds'*
't_EC' term.txt /*'t_EC'*
't_EI' term.txt /*'t_EI'*
+'t_ES' term.txt /*'t_ES'*
't_F1' term.txt /*'t_F1'*
't_F2' term.txt /*'t_F2'*
't_F3' term.txt /*'t_F3'*
@@ -1235,6 +1237,7 @@ $quote eval.txt /*$quote*
'termbidi' options.txt /*'termbidi'*
'termencoding' options.txt /*'termencoding'*
'termguicolors' options.txt /*'termguicolors'*
+'termsync' options.txt /*'termsync'*
'termwinkey' options.txt /*'termwinkey'*
'termwinscroll' options.txt /*'termwinscroll'*
'termwinsize' options.txt /*'termwinsize'*
@@ -1270,6 +1273,7 @@ $quote eval.txt /*$quote*
'tsl' options.txt /*'tsl'*
'tsr' options.txt /*'tsr'*
'tsrfu' options.txt /*'tsrfu'*
+'tsy' options.txt /*'tsy'*
'ttimeout' options.txt /*'ttimeout'*
'ttimeoutlen' options.txt /*'ttimeoutlen'*
'ttm' options.txt /*'ttm'*
@@ -10654,6 +10658,7 @@ t_AL term.txt /*t_AL*
t_AU term.txt /*t_AU*
t_BD term.txt /*t_BD*
t_BE term.txt /*t_BE*
+t_BS term.txt /*t_BS*
t_CF term.txt /*t_CF*
t_CS term.txt /*t_CS*
t_CTRL-W_. terminal.txt /*t_CTRL-W_.*
@@ -10673,6 +10678,7 @@ t_DL term.txt /*t_DL*
t_Ds term.txt /*t_Ds*
t_EC term.txt /*t_EC*
t_EI term.txt /*t_EI*
+t_ES term.txt /*t_ES*
t_F1 term.txt /*t_F1*
t_F2 term.txt /*t_F2*
t_F3 term.txt /*t_F3*
diff --git a/runtime/doc/term.txt b/runtime/doc/term.txt
index 826f015fa..7d7466f1d 100644
--- a/runtime/doc/term.txt
+++ b/runtime/doc/term.txt
@@ -1,4 +1,4 @@
-*term.txt* For Vim version 9.2. Last change: 2026 Feb 14
+*term.txt* For Vim version 9.2. Last change: 2026 Mar 04
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -510,6 +510,10 @@ Added by Vim (there are no standard codes for these):
|xterm-focus-event|
t_fd disable focus-event tracking *t_fd* *'t_fd'*
|xterm-focus-event|
+ t_BS begin synchronized update *t_BS* *'t_BS'*
+ see 'termsync'
+ t_ES end synchronized update *t_ES* *'t_ES'*
+ see 'termsync'
Some codes have a start, middle and end part. The start and end are defined
by the termcap option, the middle part is text.
@@ -528,6 +532,11 @@ t_SH must take one argument:
t_RS is sent only if the response to t_RV has been received. It is not used
on Mac OS when Terminal.app could be recognized from the termresponse.
+The t_BS and t_ES are not stored in the termcap, but are instead set to the
+following default values on startup:
+ t_BS " [?2026h"
+ t_ES " [?2026l"
+
*mouse-reporting*
Many terminals can report mouse clicks and some can report mouse movement and
dragging. Vim needs to know what codes are being used for this.
diff --git a/runtime/doc/version9.txt b/runtime/doc/version9.txt
index 120c1960d..db13c27f9 100644
--- a/runtime/doc/version9.txt
+++ b/runtime/doc/version9.txt
@@ -52613,6 +52613,9 @@ Options: ~
'statuslineopt' Extra options for the 'statusline', e.g. use the
"maxheight" suboption to use several lines.
+'t_BS' Begin synchronized update.
+'t_ES' End synchronized update.
+'termsync' Enable support for terminal DEC 2026 sync mode.
'winhighlight' Window-local highlight group mappings.
==============================================================================
diff --git a/runtime/optwin.vim b/runtime/optwin.vim
index 705195d0e..7d30f010b 100644
--- a/runtime/optwin.vim
+++ b/runtime/optwin.vim
@@ -1,7 +1,7 @@
" These commands create the option window.
"
" Maintainer: The Vim Project <https://github.com/vim/vim>
-" Last Change: 2026 Mar 02
+" Last Change: 2026 Mar 04
" Former Maintainer: Bram Moolenaar <Br...@vim.org>
" If there already is an option window, jump to that one.
@@ -385,6 +385,8 @@ call <SID>AddOption("window", gettext("number of lines to scroll for CTRL-F and
call append("$", " set window=" . &window)
call <SID>AddOption("lazyredraw", gettext("don't redraw while executing macros"))
call <SID>BinOptionG("lz", &lz)
+call <SID>AddOption("termsync", gettext("enable terminal sync mode"))
+call <SID>BinOptionG("tsy", &tsy)
if has("reltime")
call <SID>AddOption("redrawtime", gettext("timeout for 'hlsearch' and :match highlighting in msec"))
call append("$", " set rdt=" . &rdt)
diff --git a/runtime/syntax/vim.vim b/runtime/syntax/vim.vim
index a81f82bd5..5caee0534 100644
--- a/runtime/syntax/vim.vim
+++ b/runtime/syntax/vim.vim
@@ -2,7 +2,7 @@
" Language: Vim script
" Maintainer: Hirohito Higashi <h.east.727 ATMARK gmail.com>
" Doug Kearns <dougk...@gmail.com>
-" Last Change: 2026 Mar 02
+" Last Change: 2026 Mar 04
" Former Maintainer: Charles E. Campbell
" DO NOT CHANGE DIRECTLY.
@@ -70,26 +70,26 @@ syn keyword vimOption contained efm errorformat ek esckeys ei eventignore eiw ev
syn keyword vimOption contained hi history hk hkmap hkp hkmapp hls hlsearch icon iconstring ic ignorecase imaf imactivatefunc imak imactivatekey imc imcmdline imd imdisable imi iminsert ims imsearch imsf imstatusfunc imst imstyle inc include inex includeexpr is incsearch inde indentexpr indk indentkeys inf infercase im insertmode isf isfname isi isident isk iskeyword isp isprint js joinspaces jop jumpoptions key kmp keymap km keymodel kpc keyprotocol kp keywordprg lmap langmap lm langmenu lnr langnoremap lrm langremap ls laststatus lz lazyredraw lhi lhistory lbr linebreak lines lsp linespace lisp lop lispoptions lw lispwords list lcs listchars lpl loadplugins luadll magic mef makeef menc makeencoding mp makeprg mps matchpairs mat matchtime mco maxcombine mfd maxfuncdepth skipwhite nextgroup=vimSetEqual,vimSetMod
syn keyword vimOption contained mmd maxmapdepth mm maxmem mmp maxmempattern mmt maxmemtot msc maxsearchcount mis menuitems mopt messagesopt msm mkspellmem ml modeline mle modelineexpr mls modelines ma modifiable mod modified more mouse mousef mousefocus mh mousehide mousem mousemodel mousemev mousemoveevent mouses mouseshape mouset mousetime mzq mzquantum mzschemedll mzschemegcdll nf nrformats nu number nuw numberwidth ofu omnifunc odev opendevice opfunc operatorfunc ost osctimeoutlen pp packpath para paragraphs paste pt pastetoggle pex patchexpr pm patchmode pa path perldll pi preserveindent pvh previewheight pvp previewpopup pvw previewwindow pdev printdevice penc printencoding pexpr printexpr pfn printfont pheader printheader pmbcs printmbcharset pmbfn printmbfont skipwhite nextgroup=vimSetEqual,vimSetMod
syn keyword vimOption contained popt printoptions prompt pb pumborder ph pumheight pmw pummaxwidth pw pumwidth pythondll pythonhome pythonthreedll pythonthreehome pyx pyxversion qftf quickfixtextfunc qe quoteescape ro readonly rdt redrawtime re regexpengine rnu relativenumber remap rop renderoptions report rs restorescreen ri revins rl rightleft rlc rightleftcmd rubydll ru ruler ruf rulerformat rtp runtimepath scr scroll scb scrollbind scf scrollfocus sj scrolljump so scrolloff sbo scrollopt sect sections secure sel selection slm selectmode ssop sessionoptions sh shell shcf shellcmdflag sp shellpipe shq shellquote srr shellredir ssl shellslash stmp shelltemp st shelltype sxe shellxescape sxq shellxquote sr shiftround sw shiftwidth shm shortmess sn shortname sbr showbreak skipwhite nextgroup=vimSetEqual,vimSetMod
-syn keyword vimOption contained sc showcmd sloc showcmdloc sft showfulltag sm showmatch smd showmode stal showtabline stpl showtabpanel ss sidescroll siso sidescrolloff scl signcolumn scs smartcase si smartindent sta smarttab sms smoothscroll sts softtabstop spell spc spellcapcheck spf spellfile spl spelllang spo spelloptions sps spellsuggest sb splitbelow spk splitkeep spr splitright sol startofline stl statusline stlo statuslineopt su suffixes sua suffixesadd swf swapfile sws swapsync swb switchbuf smc synmaxcol syn syntax tcl tabclose tal tabline tpm tabpagemax tpl tabpanel tplo tabpanelopt ts tabstop tbs tagbsearch tc tagcase tfu tagfunc tl taglength tr tagrelative tag tags tgst tagstack tcldll term tbidi termbidi tenc termencoding tgc termguicolors twk termwinkey skipwhite nextgroup=vimSetEqual,vimSetMod
-syn keyword vimOption contained twsl termwinscroll tws termwinsize twt termwintype terse ta textauto tx textmode tw textwidth tsr thesaurus tsrfu thesaurusfunc top tildeop to timeout tm timeoutlen title titlelen titleold titlestring tb toolbar tbis toolbariconsize ttimeout ttm ttimeoutlen tbi ttybuiltin tf ttyfast ttym ttymouse tsl ttyscroll tty ttytype udir undodir udf undofile ul undolevels ur undoreload uc updatecount ut updatetime vsts varsofttabstop vts vartabstop vbs verbose vfile verbosefile vdir viewdir vop viewoptions vi viminfo vif viminfofile ve virtualedit vb visualbell warn wiv weirdinvert ww whichwrap wc wildchar wcm wildcharm wig wildignore wic wildignorecase wmnu wildmenu wim wildmode wop wildoptions wak winaltkeys wcr wincolor wi window wfb winfixbuf skipwhite nextgroup=vimSetEqual,vimSetMod
-syn keyword vimOption contained wfh winfixheight wfw winfixwidth wh winheight whl winhighlight wmh winminheight wmw winminwidth winptydll wiw winwidth wse wlseat wst wlsteal wtm wltimeoutlen wrap wm wrapmargin ws wrapscan write wa writeany wb writebackup wd writedelay xtermcodes skipwhite nextgroup=vimSetEqual,vimSetMod
+syn keyword vimOption contained sc showcmd sloc showcmdloc sft showfulltag sm showmatch smd showmode stal showtabline stpl showtabpanel ss sidescroll siso sidescrolloff scl signcolumn scs smartcase si smartindent sta smarttab sms smoothscroll sts softtabstop spell spc spellcapcheck spf spellfile spl spelllang spo spelloptions sps spellsuggest sb splitbelow spk splitkeep spr splitright sol startofline stl statusline stlo statuslineopt su suffixes sua suffixesadd swf swapfile sws swapsync swb switchbuf smc synmaxcol syn syntax tcl tabclose tal tabline tpm tabpagemax tpl tabpanel tplo tabpanelopt ts tabstop tbs tagbsearch tc tagcase tfu tagfunc tl taglength tr tagrelative tag tags tgst tagstack tcldll term tbidi termbidi tenc termencoding tgc termguicolors tsy termsync skipwhite nextgroup=vimSetEqual,vimSetMod
+syn keyword vimOption contained twk termwinkey twsl termwinscroll tws termwinsize twt termwintype terse ta textauto tx textmode tw textwidth tsr thesaurus tsrfu thesaurusfunc top tildeop to timeout tm timeoutlen title titlelen titleold titlestring tb toolbar tbis toolbariconsize ttimeout ttm ttimeoutlen tbi ttybuiltin tf ttyfast ttym ttymouse tsl ttyscroll tty ttytype udir undodir udf undofile ul undolevels ur undoreload uc updatecount ut updatetime vsts varsofttabstop vts vartabstop vbs verbose vfile verbosefile vdir viewdir vop viewoptions vi viminfo vif viminfofile ve virtualedit vb visualbell warn wiv weirdinvert ww whichwrap wc wildchar wcm wildcharm wig wildignore wic wildignorecase wmnu wildmenu wim wildmode wop wildoptions wak winaltkeys wcr wincolor wi window skipwhite nextgroup=vimSetEqual,vimSetMod
+syn keyword vimOption contained wfb winfixbuf wfh winfixheight wfw winfixwidth wh winheight whl winhighlight wmh winminheight wmw winminwidth winptydll wiw winwidth wse wlseat wst wlsteal wtm wltimeoutlen wrap wm wrapmargin ws wrapscan write wa writeany wb writebackup wd writedelay xtermcodes skipwhite nextgroup=vimSetEqual,vimSetMod
" vimOptions: These are the turn-off setting variants {{{2
" GEN_SYN_VIM: vimOption turn-off, START_STR='syn keyword vimOption contained', END_STR=''
syn keyword vimOption contained noari noallowrevins noarab noarabic noarshape noarabicshape noacd noautochdir noac noautocomplete noai noautoindent noar noautoread noasd noautoshelldir noaw noautowrite noawa noautowriteall nobk nobackup nobeval noballooneval nobevalterm noballoonevalterm nobin nobinary nobomb nobri nobreakindent nobl nobuflisted nocdh nocdhome nocin nocindent nocp nocompatible nocf noconfirm noci nocopyindent nocsre nocscoperelative nocst nocscopetag nocsverb nocscopeverbose nocrb nocursorbind nocuc nocursorcolumn nocul nocursorline nodeco nodelcombine nodiff nodg nodigraph noed noedcompatible noemo noemoji noeof noendoffile noeol noendofline noea noequalalways noeb noerrorbells noek noesckeys noet noexpandtab noex noexrc nofic nofileignorecase
syn keyword vimOption contained nofixeol nofixendofline nofen nofoldenable nofs nofsync nogd nogdefault noguipty nohid nohidden nohk nohkmap nohkp nohkmapp nohls nohlsearch noicon noic noignorecase noimc noimcmdline noimd noimdisable nois noincsearch noinf noinfercase noim noinsertmode nojs nojoinspaces nolnr nolangnoremap nolrm nolangremap nolz nolazyredraw nolbr nolinebreak nolisp nolist nolpl noloadplugins nomagic noml nomodeline nomle nomodelineexpr noma nomodifiable nomod nomodified nomore nomousef nomousefocus nomh nomousehide nomousemev nomousemoveevent nonu nonumber noodev noopendevice nopaste nopi nopreserveindent nopvw nopreviewwindow noprompt noro noreadonly nornu norelativenumber noremap nors norestorescreen nori norevins norl norightleft noru noruler
-syn keyword vimOption contained noscb noscrollbind noscf noscrollfocus nosecure nossl noshellslash nostmp noshelltemp nosr noshiftround nosn noshortname nosc noshowcmd nosft noshowfulltag nosm noshowmatch nosmd noshowmode noscs nosmartcase nosi nosmartindent nosta nosmarttab nosms nosmoothscroll nospell nosb nosplitbelow nospr nosplitright nosol nostartofline noswf noswapfile notbs notagbsearch notr notagrelative notgst notagstack notbidi notermbidi notgc notermguicolors noterse nota notextauto notx notextmode notop notildeop noto notimeout notitle nottimeout notbi nottybuiltin notf nottyfast noudf noundofile novb novisualbell nowarn nowiv noweirdinvert nowic nowildignorecase nowmnu nowildmenu nowfb nowinfixbuf nowfh nowinfixheight nowfw nowinfixwidth nowst nowlsteal
-syn keyword vimOption contained nowrap nows nowrapscan nowrite nowa nowriteany nowb nowritebackup noxtermcodes
+syn keyword vimOption contained noscb noscrollbind noscf noscrollfocus nosecure nossl noshellslash nostmp noshelltemp nosr noshiftround nosn noshortname nosc noshowcmd nosft noshowfulltag nosm noshowmatch nosmd noshowmode noscs nosmartcase nosi nosmartindent nosta nosmarttab nosms nosmoothscroll nospell nosb nosplitbelow nospr nosplitright nosol nostartofline noswf noswapfile notbs notagbsearch notr notagrelative notgst notagstack notbidi notermbidi notgc notermguicolors notsy notermsync noterse nota notextauto notx notextmode notop notildeop noto notimeout notitle nottimeout notbi nottybuiltin notf nottyfast noudf noundofile novb novisualbell nowarn nowiv noweirdinvert nowic nowildignorecase nowmnu nowildmenu nowfb nowinfixbuf nowfh nowinfixheight nowfw nowinfixwidth
+syn keyword vimOption contained nowst nowlsteal nowrap nows nowrapscan nowrite nowa nowriteany nowb nowritebackup noxtermcodes
" vimOptions: These are the invertible variants {{{2
" GEN_SYN_VIM: vimOption invertible, START_STR='syn keyword vimOption contained', END_STR=''
syn keyword vimOption contained invari invallowrevins invarab invarabic invarshape invarabicshape invacd invautochdir invac invautocomplete invai invautoindent invar invautoread invasd invautoshelldir invaw invautowrite invawa invautowriteall invbk invbackup invbeval invballooneval invbevalterm invballoonevalterm invbin invbinary invbomb invbri invbreakindent invbl invbuflisted invcdh invcdhome invcin invcindent invcp invcompatible invcf invconfirm invci invcopyindent invcsre invcscoperelative invcst invcscopetag invcsverb invcscopeverbose invcrb invcursorbind invcuc invcursorcolumn invcul invcursorline invdeco invdelcombine invdiff invdg invdigraph inved invedcompatible invemo invemoji inveof invendoffile inveol invendofline invea invequalalways inveb inverrorbells
syn keyword vimOption contained invek invesckeys invet invexpandtab invex invexrc invfic invfileignorecase invfixeol invfixendofline invfen invfoldenable invfs invfsync invgd invgdefault invguipty invhid invhidden invhk invhkmap invhkp invhkmapp invhls invhlsearch invicon invic invignorecase invimc invimcmdline invimd invimdisable invis invincsearch invinf invinfercase invim invinsertmode invjs invjoinspaces invlnr invlangnoremap invlrm invlangremap invlz invlazyredraw invlbr invlinebreak invlisp invlist invlpl invloadplugins invmagic invml invmodeline invmle invmodelineexpr invma invmodifiable invmod invmodified invmore invmousef invmousefocus invmh invmousehide invmousemev invmousemoveevent invnu invnumber invodev invopendevice invpaste invpi invpreserveindent
-syn keyword vimOption contained invpvw invpreviewwindow invprompt invro invreadonly invrnu invrelativenumber invremap invrs invrestorescreen invri invrevins invrl invrightleft invru invruler invscb invscrollbind invscf invscrollfocus invsecure invssl invshellslash invstmp invshelltemp invsr invshiftround invsn invshortname invsc invshowcmd invsft invshowfulltag invsm invshowmatch invsmd invshowmode invscs invsmartcase invsi invsmartindent invsta invsmarttab invsms invsmoothscroll invspell invsb invsplitbelow invspr invsplitright invsol invstartofline invswf invswapfile invtbs invtagbsearch invtr invtagrelative invtgst invtagstack invtbidi invtermbidi invtgc invtermguicolors invterse invta invtextauto invtx invtextmode invtop invtildeop invto invtimeout invtitle
-syn keyword vimOption contained invttimeout invtbi invttybuiltin invtf invttyfast invudf invundofile invvb invvisualbell invwarn invwiv invweirdinvert invwic invwildignorecase invwmnu invwildmenu invwfb invwinfixbuf invwfh invwinfixheight invwfw invwinfixwidth invwst invwlsteal invwrap invws invwrapscan invwrite invwa invwriteany invwb invwritebackup invxtermcodes
+syn keyword vimOption contained invpvw invpreviewwindow invprompt invro invreadonly invrnu invrelativenumber invremap invrs invrestorescreen invri invrevins invrl invrightleft invru invruler invscb invscrollbind invscf invscrollfocus invsecure invssl invshellslash invstmp invshelltemp invsr invshiftround invsn invshortname invsc invshowcmd invsft invshowfulltag invsm invshowmatch invsmd invshowmode invscs invsmartcase invsi invsmartindent invsta invsmarttab invsms invsmoothscroll invspell invsb invsplitbelow invspr invsplitright invsol invstartofline invswf invswapfile invtbs invtagbsearch invtr invtagrelative invtgst invtagstack invtbidi invtermbidi invtgc invtermguicolors invtsy invtermsync invterse invta invtextauto invtx invtextmode invtop invtildeop invto invtimeout
+syn keyword vimOption contained invtitle invttimeout invtbi invttybuiltin invtf invttyfast invudf invundofile invvb invvisualbell invwarn invwiv invweirdinvert invwic invwildignorecase invwmnu invwildmenu invwfb invwinfixbuf invwfh invwinfixheight invwfw invwinfixwidth invwst invwlsteal invwrap invws invwrapscan invwrite invwa invwriteany invwb invwritebackup invxtermcodes
" termcap codes (which can also be set) {{{2
" GEN_SYN_VIM: vimOption term output code, START_STR='syn keyword vimOption contained', END_STR='skipwhite nextgroup=vimSetEqual,vimSetMod'
-syn keyword vimOption contained t_AB t_AF t_AU t_AL t_al t_bc t_BE t_BD t_cd t_ce t_Ce t_CF t_cl t_cm t_Co t_CS t_Cs t_cs t_CV t_da t_db t_DL t_dl t_ds t_Ds t_EC t_EI t_fs t_fd t_fe t_GP t_IE t_IS t_ke t_ks t_le t_mb t_md t_me t_mr t_ms t_nd t_op t_RF t_RB t_RC t_RI t_Ri t_RK t_RS t_RT t_RV t_Sb t_SC t_se t_Sf t_SH t_SI t_Si t_so t_SR t_sr t_ST t_Te t_te t_TE t_ti t_TI t_Ts t_ts t_u7 t_ue t_us t_Us t_ut t_vb t_ve t_vi t_VS t_vs t_WP t_WS t_XM t_xn t_xs t_ZH t_ZR t_8f t_8b t_8u t_xo skipwhite nextgroup=vimSetEqual,vimSetMod
+syn keyword vimOption contained t_AB t_AF t_AU t_AL t_al t_bc t_BE t_BD t_cd t_ce t_Ce t_CF t_cl t_cm t_Co t_CS t_Cs t_cs t_CV t_da t_db t_DL t_dl t_ds t_Ds t_EC t_EI t_fs t_fd t_fe t_GP t_IE t_IS t_ke t_ks t_le t_mb t_md t_me t_mr t_ms t_nd t_op t_RF t_RB t_RC t_RI t_Ri t_RK t_RS t_RT t_RV t_Sb t_SC t_se t_Sf t_SH t_SI t_Si t_so t_SR t_sr t_ST t_Te t_te t_TE t_ti t_TI t_Ts t_ts t_u7 t_ue t_us t_Us t_ut t_vb t_ve t_vi t_VS t_vs t_WP t_WS t_XM t_xn t_xs t_ZH t_ZR t_8f t_8b t_8u t_xo t_BS t_ES skipwhite nextgroup=vimSetEqual,vimSetMod
" term key codes
syn keyword vimOption contained t_F1 t_F2 t_F3 t_F4 t_F5 t_F6 t_F7 t_F8 t_F9 t_k1 t_K1 t_k2 t_k3 t_K3 t_k4 t_K4 t_k5 t_K5 t_k6 t_K6 t_k7 t_K7 t_k8 t_K8 t_k9 t_K9 t_KA t_kb t_kB t_KB t_KC t_kd t_kD t_KD t_KE t_KF t_KG t_kh t_KH t_kI t_KI t_KJ t_KK t_kl t_KL t_kN t_kP t_kr t_ku
syn match vimOption contained "t_%1"
@@ -110,10 +110,10 @@ syn keyword vimOptionVarName contained hi history hk hkmap hkp hkmapp hls hlsear
syn keyword vimOptionVarName contained mfd maxfuncdepth mmd maxmapdepth mm maxmem mmp maxmempattern mmt maxmemtot msc maxsearchcount mis menuitems mopt messagesopt msm mkspellmem ml modeline mle modelineexpr mls modelines ma modifiable mod modified more mouse mousef mousefocus mh mousehide mousem mousemodel mousemev mousemoveevent mouses mouseshape mouset mousetime mzq mzquantum mzschemedll mzschemegcdll nf nrformats nu number nuw numberwidth ofu omnifunc odev opendevice opfunc operatorfunc ost osctimeoutlen pp packpath para paragraphs paste pt pastetoggle pex patchexpr pm patchmode pa path perldll pi preserveindent pvh previewheight pvp previewpopup pvw previewwindow pdev printdevice penc printencoding pexpr printexpr pfn printfont pheader printheader pmbcs printmbcharset
syn keyword vimOptionVarName contained pmbfn printmbfont popt printoptions prompt pb pumborder ph pumheight pmw pummaxwidth pw pumwidth pythondll pythonhome pythonthreedll pythonthreehome pyx pyxversion qftf quickfixtextfunc qe quoteescape ro readonly rdt redrawtime re regexpengine rnu relativenumber remap rop renderoptions report rs restorescreen ri revins rl rightleft rlc rightleftcmd rubydll ru ruler ruf rulerformat rtp runtimepath scr scroll scb scrollbind scf scrollfocus sj scrolljump so scrolloff sbo scrollopt sect sections secure sel selection slm selectmode ssop sessionoptions sh shell shcf shellcmdflag sp shellpipe shq shellquote srr shellredir ssl shellslash stmp shelltemp st shelltype sxe shellxescape sxq shellxquote sr shiftround sw shiftwidth shm shortmess
syn keyword vimOptionVarName contained sn shortname sbr showbreak sc showcmd sloc showcmdloc sft showfulltag sm showmatch smd showmode stal showtabline stpl showtabpanel ss sidescroll siso sidescrolloff scl signcolumn scs smartcase si smartindent sta smarttab sms smoothscroll sts softtabstop spell spc spellcapcheck spf spellfile spl spelllang spo spelloptions sps spellsuggest sb splitbelow spk splitkeep spr splitright sol startofline stl statusline stlo statuslineopt su suffixes sua suffixesadd swf swapfile sws swapsync swb switchbuf smc synmaxcol syn syntax tcl tabclose tal tabline tpm tabpagemax tpl tabpanel tplo tabpanelopt ts tabstop tbs tagbsearch tc tagcase tfu tagfunc tl taglength tr tagrelative tag tags tgst tagstack tcldll term tbidi termbidi tenc termencoding
-syn keyword vimOptionVarName contained tgc termguicolors twk termwinkey twsl termwinscroll tws termwinsize twt termwintype terse ta textauto tx textmode tw textwidth tsr thesaurus tsrfu thesaurusfunc top tildeop to timeout tm timeoutlen title titlelen titleold titlestring tb toolbar tbis toolbariconsize ttimeout ttm ttimeoutlen tbi ttybuiltin tf ttyfast ttym ttymouse tsl ttyscroll tty ttytype udir undodir udf undofile ul undolevels ur undoreload uc updatecount ut updatetime vsts varsofttabstop vts vartabstop vbs verbose vfile verbosefile vdir viewdir vop viewoptions vi viminfo vif viminfofile ve virtualedit vb visualbell warn wiv weirdinvert ww whichwrap wc wildchar wcm wildcharm wig wildignore wic wildignorecase wmnu wildmenu wim wildmode wop wildoptions wak winaltkeys
-syn keyword vimOptionVarName contained wcr wincolor wi window wfb winfixbuf wfh winfixheight wfw winfixwidth wh winheight whl winhighlight wmh winminheight wmw winminwidth winptydll wiw winwidth wse wlseat wst wlsteal wtm wltimeoutlen wrap wm wrapmargin ws wrapscan write wa writeany wb writebackup wd writedelay xtermcodes
+syn keyword vimOptionVarName contained tgc termguicolors tsy termsync twk termwinkey twsl termwinscroll tws termwinsize twt termwintype terse ta textauto tx textmode tw textwidth tsr thesaurus tsrfu thesaurusfunc top tildeop to timeout tm timeoutlen title titlelen titleold titlestring tb toolbar tbis toolbariconsize ttimeout ttm ttimeoutlen tbi ttybuiltin tf ttyfast ttym ttymouse tsl ttyscroll tty ttytype udir undodir udf undofile ul undolevels ur undoreload uc updatecount ut updatetime vsts varsofttabstop vts vartabstop vbs verbose vfile verbosefile vdir viewdir vop viewoptions vi viminfo vif viminfofile ve virtualedit vb visualbell warn wiv weirdinvert ww whichwrap wc wildchar wcm wildcharm wig wildignore wic wildignorecase wmnu wildmenu wim wildmode wop wildoptions
+syn keyword vimOptionVarName contained wak winaltkeys wcr wincolor wi window wfb winfixbuf wfh winfixheight wfw winfixwidth wh winheight whl winhighlight wmh winminheight wmw winminwidth winptydll wiw winwidth wse wlseat wst wlsteal wtm wltimeoutlen wrap wm wrapmargin ws wrapscan write wa writeany wb writebackup wd writedelay xtermcodes
" GEN_SYN_VIM: vimOption term output code variable, START_STR='syn keyword vimOptionVarName contained', END_STR=''
-syn keyword vimOptionVarName contained t_AB t_AF t_AU t_AL t_al t_bc t_BE t_BD t_cd t_ce t_Ce t_CF t_cl t_cm t_Co t_CS t_Cs t_cs t_CV t_da t_db t_DL t_dl t_ds t_Ds t_EC t_EI t_fs t_fd t_fe t_GP t_IE t_IS t_ke t_ks t_le t_mb t_md t_me t_mr t_ms t_nd t_op t_RF t_RB t_RC t_RI t_Ri t_RK t_RS t_RT t_RV t_Sb t_SC t_se t_Sf t_SH t_SI t_Si t_so t_SR t_sr t_ST t_Te t_te t_TE t_ti t_TI t_Ts t_ts t_u7 t_ue t_us t_Us t_ut t_vb t_ve t_vi t_VS t_vs t_WP t_WS t_XM t_xn t_xs t_ZH t_ZR t_8f t_8b t_8u t_xo
+syn keyword vimOptionVarName contained t_AB t_AF t_AU t_AL t_al t_bc t_BE t_BD t_cd t_ce t_Ce t_CF t_cl t_cm t_Co t_CS t_Cs t_cs t_CV t_da t_db t_DL t_dl t_ds t_Ds t_EC t_EI t_fs t_fd t_fe t_GP t_IE t_IS t_ke t_ks t_le t_mb t_md t_me t_mr t_ms t_nd t_op t_RF t_RB t_RC t_RI t_Ri t_RK t_RS t_RT t_RV t_Sb t_SC t_se t_Sf t_SH t_SI t_Si t_so t_SR t_sr t_ST t_Te t_te t_TE t_ti t_TI t_Ts t_ts t_u7 t_ue t_us t_Us t_ut t_vb t_ve t_vi t_VS t_vs t_WP t_WS t_XM t_xn t_xs t_ZH t_ZR t_8f t_8b t_8u t_xo t_BS t_ES
syn keyword vimOptionVarName contained t_F1 t_F2 t_F3 t_F4 t_F5 t_F6 t_F7 t_F8 t_F9 t_k1 t_K1 t_k2 t_k3 t_K3 t_k4 t_K4 t_k5 t_K5 t_k6 t_K6 t_k7 t_K7 t_k8 t_K8 t_k9 t_K9 t_KA t_kb t_kB t_KB t_KC t_kd t_kD t_KD t_KE t_KF t_KG t_kh t_KH t_kI t_KI t_KJ t_KK t_kl t_KL t_kN t_kP t_kr t_ku
syn match vimOptionVarName contained "t_%1"
syn match vimOptionVarName contained "t_#2"
diff --git a/src/drawscreen.c b/src/drawscreen.c
index 8c985394a..92fd9a62c 100644
--- a/src/drawscreen.c
+++ b/src/drawscreen.c
@@ -160,6 +160,8 @@ update_screen(int type_arg)
}
updating_screen = TRUE;
+ term_set_sync_output(TERM_SYNC_OUTPUT_ENABLE);
+
#ifdef FEAT_PROP_POPUP
// Update popup_mask if needed. This may set w_redraw_top and w_redraw_bot
// in some windows.
@@ -434,6 +436,8 @@ update_screen(int type_arg)
redraw_listener_cleanup();
#endif
+ term_set_sync_output(TERM_SYNC_OUTPUT_DISABLE);
+
return OK;
}
diff --git a/src/getchar.c b/src/getchar.c
index eaa766795..e825498c5 100644
--- a/src/getchar.c
+++ b/src/getchar.c
@@ -1725,6 +1725,9 @@ using_script(void)
void
before_blocking(void)
{
+ // Tell terminal to flush screen contents before blocking
+ term_set_sync_output(TERM_SYNC_OUTPUT_FLUSH);
+
updatescript(0);
#ifdef FEAT_EVAL
if (may_garbage_collect)
diff --git a/src/gui.c b/src/gui.c
index a805c1423..698c7c2b3 100644
--- a/src/gui.c
+++ b/src/gui.c
@@ -148,8 +148,11 @@ gui_start(char_u *arg UNUSED)
}
#ifdef HAVE_CLIPMETHOD
else
+ {
// Reset clipmethod to CLIPMETHOD_NONE
choose_clipmethod();
+ term_set_sync_output(TERM_SYNC_OUTPUT_OFF);
+ }
#endif
#if defined(FEAT_SOCKETSERVER) && defined(FEAT_GUI_GTK)
diff --git a/src/main.c b/src/main.c
index c31b14d0c..ec046f3b2 100644
--- a/src/main.c
+++ b/src/main.c
@@ -892,6 +892,8 @@ vim_main2(void)
may_req_termresponse();
may_req_bg_color();
+
+ may_req_sync_output();
# endif
// start in insert mode
@@ -1855,6 +1857,8 @@ getout(int exitval)
free_cmd_argsW();
#endif
+ term_set_sync_output(TERM_SYNC_OUTPUT_OFF);
+
mch_exit(exitval);
}
diff --git a/src/option.c b/src/option.c
index 8de0d9c68..a56dfa3ae 100644
--- a/src/option.c
+++ b/src/option.c
@@ -4409,6 +4409,14 @@ did_set_termguicolors(optset_T *args UNUSED)
}
#endif
+ char *
+did_set_termsync(optset_T *args UNUSED)
+{
+ if (!p_tsy)
+ term_set_sync_output(TERM_SYNC_OUTPUT_OFF);
+ return NULL;
+}
+
#if defined(FEAT_TERMINAL)
/*
* Process the updated 'termwinscroll' option value.
diff --git a/src/option.h b/src/option.h
index fddc3905c..5f656f9b1 100644
--- a/src/option.h
+++ b/src/option.h
@@ -1035,6 +1035,7 @@ EXTERN char_u *p_tenc; // 'termencoding'
#ifdef FEAT_TERMGUICOLORS
EXTERN int p_tgc; // 'termguicolors'
#endif
+EXTERN int p_tsy; // 'termsync'
#ifdef FEAT_TERMINAL
EXTERN long p_twsl; // 'termwinscroll'
#endif
diff --git a/src/optiondefs.h b/src/optiondefs.h
index 2a2b1c0da..6ab34ff9e 100644
--- a/src/optiondefs.h
+++ b/src/optiondefs.h
@@ -2661,6 +2661,9 @@ static struct vimoption options[] =
{(char_u *)FALSE, (char_u *)FALSE}
#endif
SCTX_INIT},
+ {"termsync", "tsy", P_BOOL|P_VI_DEF,
+ (char_u *)&p_tsy, PV_NONE, did_set_termsync, NULL,
+ {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
{"termwinkey", "twk", P_STRING|P_ALLOCED|P_RWIN|P_VI_DEF,
#ifdef FEAT_TERMINAL
(char_u *)VAR_WIN, PV_TWK, did_set_termwinkey, NULL,
@@ -3161,6 +3164,8 @@ static struct vimoption options[] =
p_term("t_8b", T_8B)
p_term("t_8u", T_8U)
p_term("t_xo", T_XON)
+ p_term("t_BS", T_BSU)
+ p_term("t_ES", T_ESU)
// terminal key codes are not in here
diff --git a/src/optionstr.c b/src/optionstr.c
index 7fb8bf548..a34d86a01 100644
--- a/src/optionstr.c
+++ b/src/optionstr.c
@@ -4456,6 +4456,9 @@ did_set_term_option(optset_T *args)
out_str(T_BE);
}
+ if (varp == &T_BSU || varp == &T_ESU)
+ term_set_sync_output(TERM_SYNC_OUTPUT_OFF);
+
return NULL;
}
diff --git a/src/po/vim.pot b/src/po/vim.pot
index f56581d18..32898088c 100644
--- a/src/po/vim.pot
+++ b/src/po/vim.pot
@@ -8,7 +8,7 @@ msgid ""
msgstr ""
"Project-Id-Version: Vim
"
"Report-Msgid-Bugs-To: vim...@vim.org
"
-"POT-Creation-Date: 2026-03-02 19:53+0000
"
+"POT-Creation-Date: 2026-03-04 21:06+0000
"
"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE
"
"Last-Translator: FULL NAME <EMAIL@ADDRESS>
"
"Language-Team: LANGUAGE <L...@li.org>
"
@@ -9445,6 +9445,9 @@ msgstr ""
msgid "don't redraw while executing macros"
msgstr ""
+msgid "enable terminal sync mode"
+msgstr ""
+
msgid "timeout for 'hlsearch' and :match highlighting in msec"
msgstr ""
diff --git a/src/proto/option.pro b/src/proto/option.pro
index 4fa8935c0..892a6ce3b 100644
--- a/src/proto/option.pro
+++ b/src/proto/option.pro
@@ -72,6 +72,7 @@ char *did_set_smoothscroll(optset_T *args);
char *did_set_spell(optset_T *args);
char *did_set_swapfile(optset_T *args);
char *did_set_termguicolors(optset_T *args);
+char *did_set_termsync(optset_T *args);
char *did_set_termwinscroll(optset_T *args);
char *did_set_terse(optset_T *args);
char *did_set_textauto(optset_T *args);
diff --git a/src/proto/term.pro b/src/proto/term.pro
index b831bc181..862864b39 100644
--- a/src/proto/term.pro
+++ b/src/proto/term.pro
@@ -96,4 +96,6 @@ void swap_tcap(void);
void ansi_color2rgb(int nr, char_u *r, char_u *g, char_u *b, char_u *ansi_idx);
void cterm_color2rgb(int nr, char_u *r, char_u *g, char_u *b, char_u *ansi_idx);
int term_replace_keycodes(char_u *ta_buf, int ta_len, int len_arg);
+void may_req_sync_output(void);
+void term_set_sync_output(int flags);
/* vim: set ft=c : */
diff --git a/src/structs.h b/src/structs.h
index b0b559e8a..2e0aaa31a 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -5329,3 +5329,12 @@ typedef enum {
# endif
#endif
+
+// Used in term_set_sync_output()
+typedef enum
+{
+ TERM_SYNC_OUTPUT_ENABLE = 1 << 0,
+ TERM_SYNC_OUTPUT_DISABLE = 1 << 1,
+ TERM_SYNC_OUTPUT_OFF = 1 << 2,
+ TERM_SYNC_OUTPUT_FLUSH = 1 << 3,
+} term_sync_output_T;
diff --git a/src/term.c b/src/term.c
index 39f63fa95..5e8b0945c 100644
--- a/src/term.c
+++ b/src/term.c
@@ -130,6 +130,9 @@ static termrequest_T u7_status = TERMREQUEST_INIT;
// Request xterm compatibility check:
static termrequest_T xcc_status = TERMREQUEST_INIT;
+// Request synchronized output report
+static termrequest_T sync_output_status = TERMREQUEST_INIT;
+
#ifdef FEAT_TERMRESPONSE
# ifdef FEAT_TERMINAL
// Request foreground color report:
@@ -165,6 +168,7 @@ static termrequest_T *all_termrequests[] = {
&rbm_status,
&rcs_status,
&winpos_status,
+ &sync_output_status,
NULL
};
@@ -224,6 +228,24 @@ static int initial_cursor_shape_blink = FALSE;
static int initial_cursor_blink = FALSE;
#endif
+// 0 Mode is not recognized not supported
+//
+// 1 Set supported and screen updates are not shown to
+// the user until mode is disabled
+//
+// 2 Reset supported and screen updates are shown as usual
+// (e.g. as soon as they arrive)
+//
+// 3 Permanently set undefined
+//
+// 4 Permanently reset not supported
+//
+static int sync_output_setting = 0;
+
+// > 0: Currently batching output
+// == 0: No synchronized output
+static int sync_output_state = 0;
+
/*
* The builtin termcap entries.
*
@@ -2185,6 +2207,14 @@ set_termname(char_u *term)
&& (T_CRV == NULL || *T_CRV == NUL))
T_CRV = (char_u *)" [>c";
+ // These are the DECSET/DECRESET codes for synchronized output. iTerm
+ // supports another way, but this is the de facto standard terminal codes
+ // that are used (from what I can tell - 64bitman).
+ if (T_BSU == NULL || T_BSU == empty_option)
+ T_BSU = (char_u *)" [?2026h";
+ if (T_ESU == NULL || T_ESU == empty_option)
+ T_ESU = (char_u *)" [?2026l";
+
#ifdef UNIX
/*
* Any "stty" settings override the default for t_kb from the termcap.
@@ -5564,6 +5594,8 @@ handle_csi_function_key(
*
* - DA1 query response: {lead}?...;c
*
+ * - DEC mode 2026 response (synchronized output): {lead}?2026;{mode}$y
+ *
* Return 0 for no match, -1 for partial match, > 0 for full match.
*/
static int
@@ -5692,6 +5724,28 @@ handle_csi(
key_name[1] = (int)KE_IGNORE;
}
+ // DEC 2026 mode response (for 'termsync' option)
+ else if (first == '?' && trail == 'y' && argc == 2 && arg[0] == 2026)
+ {
+ int setting = arg[1];
+
+ *slen = csi_len;
+ key_name[0] = (int)KS_EXTRA;
+ key_name[1] = (int)KE_IGNORE;
+
+ if (setting >= 0 && setting <= 4)
+ {
+ sync_output_setting = setting;
+ LOG_TRN("Received DEC 2026 mode: %s", tp);
+ sync_output_status.tr_progress = STATUS_GOT;
+
+ set_option_value_give_err((char_u *)"termsync",
+ setting == 1 || setting == 2, NULL, 0);
+ }
+ else
+ LOG_TRN("Unknown synchronized output setting %d", setting);
+ }
+
// Version string: Eat it when there is at least one digit and
// it ends in 'c'
else if (*T_CRV != NUL && ap > argp + 1 && trail == 'c')
@@ -7798,3 +7852,95 @@ term_replace_keycodes(char_u *ta_buf, int ta_len, int len_arg)
}
return len;
}
+
+#ifdef FEAT_TERMRESPONSE
+/*
+ * Query the setting for DEC mode 2026 (synchronized output) from the terminal.
+ */
+ void
+may_req_sync_output(void)
+{
+ if (can_get_termresponse() && starting == 0
+ && sync_output_status.tr_progress == STATUS_GET)
+ {
+ MAY_WANT_TO_LOG_THIS;
+ LOG_TR1("Sending synchronized output request");
+
+ out_str((char_u *)" [?2026$p");
+ termrequest_sent(&sync_output_status);
+
+ // check for the characters now, otherwise they might be eaten by
+ // get_keystroke()
+ out_flush();
+ (void)vpeekc_nomap();
+ }
+
+}
+#endif
+
+/*
+ * Enable or disable synchronized output if possible. Specification can be found
+ * here:
+ * https://github.com/contour-terminal/vt-extensions/blob/master/synchronized-output.md
+ */
+ void
+term_set_sync_output(int flags)
+{
+ bool allowed;
+ char_u *str;
+#ifdef FEAT_GUI
+ bool in_gui = gui.in_use;
+#else
+ bool in_gui = false;
+#endif
+
+ allowed = p_tsy && (sync_output_setting == 1 || sync_output_setting == 2);
+
+ if (flags & TERM_SYNC_OUTPUT_FLUSH)
+ {
+ // Tell terminal to display screen contents
+ if (allowed && !in_gui && sync_output_state > 0 && *T_ESU != NUL &&
+ *T_BSU != NUL)
+ {
+ out_str((char_u *)T_ESU);
+ out_str((char_u *)T_BSU);
+ }
+ return;
+ }
+
+ // Forcibly turn off synchronized output (e.g. 'notermsync')
+ if (flags & TERM_SYNC_OUTPUT_OFF)
+ {
+ if (sync_output_state > 0 && *T_ESU != NUL)
+ {
+ out_str((char_u *)T_ESU);
+ sync_output_state = 0;
+ }
+ return;
+ }
+
+ if (!allowed || in_gui || *T_BSU == NUL || *T_ESU == NUL)
+ return;
+
+ // Only enable if we aren't already, and only disable if we have reached
+ // zero.
+ if (flags & TERM_SYNC_OUTPUT_ENABLE)
+ {
+ if (sync_output_state++ > 0)
+ return;
+ str = T_BSU;
+ }
+ else if (flags & TERM_SYNC_OUTPUT_DISABLE)
+ {
+ if (sync_output_state == 0 || --sync_output_state > 0)
+ return;
+ str = T_ESU;
+ }
+ else
+ {
+ siemsg("Unknown sync output value %d", flags);
+ return;
+ }
+
+ out_str((char_u *)str);
+}
diff --git a/src/termdefs.h b/src/termdefs.h
index d611fcf44..7c15c26c1 100644
--- a/src/termdefs.h
+++ b/src/termdefs.h
@@ -116,10 +116,12 @@ enum SpecialKey
KS_FD, // disable focus event tracking
KS_FE, // enable focus event tracking
KS_CF, // set terminal alternate font
- KS_XON // terminal uses xon/xoff handshaking
+ KS_XON, // terminal uses xon/xoff handshaking
+ KS_BSU, // begin synchronized update
+ KS_ESU // end synchronized update
};
-#define KS_LAST KS_XON
+#define KS_LAST KS_ESU
/*
* the terminal capabilities are stored in this array
@@ -226,6 +228,8 @@ extern char_u *(term_strings[]); // current terminal strings
#define T_FD (TERM_STR(KS_FD)) // disable focus event tracking
#define T_FE (TERM_STR(KS_FE)) // enable focus event tracking
#define T_XON (TERM_STR(KS_XON)) // terminal uses xon/xoff handshaking
+#define T_BSU (TERM_STR(KS_BSU)) // begin synchronized update
+#define T_ESU (TERM_STR(KS_ESU)) // end synchronized update
typedef enum {
TMODE_COOK, // terminal mode for external cmds and Ex mode
diff --git a/src/testdir/test_options.vim b/src/testdir/test_options.vim
index dc1399793..bca393b1a 100644
--- a/src/testdir/test_options.vim
+++ b/src/testdir/test_options.vim
@@ -318,7 +318,7 @@ func Test_set_completion()
" Expand abbreviation of options.
call feedkeys(":set ts\<C-A>\<C-B>\"\<CR>", 'tx')
- call assert_equal('"set tabstop thesaurus thesaurusfunc ttyscroll', @:)
+ call assert_equal('"set tabstop termsync thesaurus thesaurusfunc ttyscroll', @:)
" Expand current value
call feedkeys(":set suffixes=\<C-A>\<C-B>\"\<CR>", 'tx')
diff --git a/src/version.c b/src/version.c
index 39821b752..0590e75f7 100644
--- a/src/version.c
+++ b/src/version.c
@@ -734,6 +734,8 @@ static char *(features[]) =
static int included_patches[] =
{ /* Add new patch number below this line */
+/**/
+ 110,
/**/
109,
/**/
Commit: https://github.com/vim/vim/commit/7ba60f17c22ef81680f25f8c3225b4edb55ddd7c
Author: Foxe Chen <chen...@gmail.com>
Date: Wed Mar 4 20:52:25 2026 +0000
patch 9.2.0110: No support for terminal synchronization mode
Problem: No support for terminal synchronization mode
Solution: Add DEC 2026 support using the 'termsync' option
(Foxe Chen).
related: #11718
closes: #19541
Signed-off-by: Foxe Chen <chen...@gmail.com>
Signed-off-by: Christian Brabandt <c...@256bit.org>
diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index 327494d68..c7e010d59 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -1,4 +1,4 @@
-*options.txt* For Vim version 9.2. Last change: 2026 Mar 02
+*options.txt* For Vim version 9.2. Last change: 2026 Mar 04
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -9096,6 +9096,24 @@ A jump table for the options with a short description can be found at |Q_op|.
<
NOTE: This option is reset when 'compatible' is set.
+ *'termsync'* *'tsy'*
+'termsync' 'tsy' boolean (default off)
+ global
+ If the host terminal supports it, buffer all screen updates made
+ during a redraw cycle so that each screen is displayed in the terminal
+ all at once. This can prevent tearing or flickering when the terminal
+ updates faster than Vim can redraw. If the host terminal does not
+ support it or if Vim is running graphically, then this option does
+ nothing.
+
+ The specification can be found at:
+ https://github.com/contour-terminal/vt-extensions/blob/master/synchronized-output.md
+
+ Vim may set this option automatically at startup time when Vim is
+ compiled with the |+termresponse| feature, by querying the terminal
+ for DEC mode 2026 support. The terminal codes used are |t_BS| and
+ |t_ES|.
+
*'termwinkey'* *'twk'*
'termwinkey' 'twk' string (default "")
local to window
diff --git a/runtime/doc/quickref.txt b/runtime/doc/quickref.txt
index e7b2068b0..fd2775764 100644
--- a/runtime/doc/quickref.txt
+++ b/runtime/doc/quickref.txt
@@ -1,4 +1,4 @@
-*quickref.txt* For Vim version 9.2. Last change: 2026 Mar 02
+*quickref.txt* For Vim version 9.2. Last change: 2026 Mar 04
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -963,6 +963,7 @@ Short explanation of each option: *option-list*
'termbidi' 'tbidi' terminal takes care of bi-directionality
'termencoding' 'tenc' character encoding used by the terminal
'termguicolors' 'tgc' use GUI colors for the terminal
+'termsync' 'tsy' enable terminal sync mode for redraw
'termwinkey' 'twk' key that precedes a Vim command in a terminal
'termwinscroll' 'twsl' max number of scrollback lines in a terminal window
'termwinsize' 'tws' size of a terminal window
diff --git a/runtime/doc/tags b/runtime/doc/tags
index a881c0acf..a000eacbd 100644
--- a/runtime/doc/tags
+++ b/runtime/doc/tags
@@ -1071,6 +1071,7 @@ $quote eval.txt /*$quote*
't_AU' term.txt /*'t_AU'*
't_BD' term.txt /*'t_BD'*
't_BE' term.txt /*'t_BE'*
+'t_BS' term.txt /*'t_BS'*
't_CF' term.txt /*'t_CF'*
't_CS' term.txt /*'t_CS'*
't_CV' term.txt /*'t_CV'*
@@ -1081,6 +1082,7 @@ $quote eval.txt /*$quote*
't_Ds' term.txt /*'t_Ds'*
't_EC' term.txt /*'t_EC'*
't_EI' term.txt /*'t_EI'*
+'t_ES' term.txt /*'t_ES'*
't_F1' term.txt /*'t_F1'*
't_F2' term.txt /*'t_F2'*
't_F3' term.txt /*'t_F3'*
@@ -1235,6 +1237,7 @@ $quote eval.txt /*$quote*
'termbidi' options.txt /*'termbidi'*
'termencoding' options.txt /*'termencoding'*
'termguicolors' options.txt /*'termguicolors'*
+'termsync' options.txt /*'termsync'*
'termwinkey' options.txt /*'termwinkey'*
'termwinscroll' options.txt /*'termwinscroll'*
'termwinsize' options.txt /*'termwinsize'*
@@ -1270,6 +1273,7 @@ $quote eval.txt /*$quote*
'tsl' options.txt /*'tsl'*
'tsr' options.txt /*'tsr'*
'tsrfu' options.txt /*'tsrfu'*
+'tsy' options.txt /*'tsy'*
'ttimeout' options.txt /*'ttimeout'*
'ttimeoutlen' options.txt /*'ttimeoutlen'*
'ttm' options.txt /*'ttm'*
@@ -10654,6 +10658,7 @@ t_AL term.txt /*t_AL*
t_AU term.txt /*t_AU*
t_BD term.txt /*t_BD*
t_BE term.txt /*t_BE*
+t_BS term.txt /*t_BS*
t_CF term.txt /*t_CF*
t_CS term.txt /*t_CS*
t_CTRL-W_. terminal.txt /*t_CTRL-W_.*
@@ -10673,6 +10678,7 @@ t_DL term.txt /*t_DL*
t_Ds term.txt /*t_Ds*
t_EC term.txt /*t_EC*
t_EI term.txt /*t_EI*
+t_ES term.txt /*t_ES*
t_F1 term.txt /*t_F1*
t_F2 term.txt /*t_F2*
t_F3 term.txt /*t_F3*
diff --git a/runtime/doc/term.txt b/runtime/doc/term.txt
index 826f015fa..7d7466f1d 100644
--- a/runtime/doc/term.txt
+++ b/runtime/doc/term.txt
@@ -1,4 +1,4 @@
-*term.txt* For Vim version 9.2. Last change: 2026 Feb 14
+*term.txt* For Vim version 9.2. Last change: 2026 Mar 04
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -510,6 +510,10 @@ Added by Vim (there are no standard codes for these):
|xterm-focus-event|
t_fd disable focus-event tracking *t_fd* *'t_fd'*
|xterm-focus-event|
+ t_BS begin synchronized update *t_BS* *'t_BS'*
+ see 'termsync'
+ t_ES end synchronized update *t_ES* *'t_ES'*
+ see 'termsync'
Some codes have a start, middle and end part. The start and end are defined
by the termcap option, the middle part is text.
@@ -528,6 +532,11 @@ t_SH must take one argument:
t_RS is sent only if the response to t_RV has been received. It is not used
on Mac OS when Terminal.app could be recognized from the termresponse.
+The t_BS and t_ES are not stored in the termcap, but are instead set to the
+following default values on startup:
+ t_BS " [?2026h"
+ t_ES " [?2026l"
+
*mouse-reporting*
Many terminals can report mouse clicks and some can report mouse movement and
dragging. Vim needs to know what codes are being used for this.
diff --git a/runtime/doc/version9.txt b/runtime/doc/version9.txt
index 120c1960d..db13c27f9 100644
--- a/runtime/doc/version9.txt
+++ b/runtime/doc/version9.txt
@@ -52613,6 +52613,9 @@ Options: ~
'statuslineopt' Extra options for the 'statusline', e.g. use the
"maxheight" suboption to use several lines.
+'t_BS' Begin synchronized update.
+'t_ES' End synchronized update.
+'termsync' Enable support for terminal DEC 2026 sync mode.
'winhighlight' Window-local highlight group mappings.
==============================================================================
diff --git a/runtime/optwin.vim b/runtime/optwin.vim
index 705195d0e..7d30f010b 100644
--- a/runtime/optwin.vim
+++ b/runtime/optwin.vim
@@ -1,7 +1,7 @@
" These commands create the option window.
"
" Maintainer: The Vim Project <https://github.com/vim/vim>
-" Last Change: 2026 Mar 02
+" Last Change: 2026 Mar 04
" Former Maintainer: Bram Moolenaar <Br...@vim.org>
" If there already is an option window, jump to that one.
@@ -385,6 +385,8 @@ call <SID>AddOption("window", gettext("number of lines to scroll for CTRL-F and
call append("$", " set window=" . &window)
call <SID>AddOption("lazyredraw", gettext("don't redraw while executing macros"))
call <SID>BinOptionG("lz", &lz)
+call <SID>AddOption("termsync", gettext("enable terminal sync mode"))
+call <SID>BinOptionG("tsy", &tsy)
if has("reltime")
call <SID>AddOption("redrawtime", gettext("timeout for 'hlsearch' and :match highlighting in msec"))
call append("$", " set rdt=" . &rdt)
diff --git a/runtime/syntax/vim.vim b/runtime/syntax/vim.vim
index a81f82bd5..5caee0534 100644
--- a/runtime/syntax/vim.vim
+++ b/runtime/syntax/vim.vim
@@ -2,7 +2,7 @@
" Language: Vim script
" Maintainer: Hirohito Higashi <h.east.727 ATMARK gmail.com>
" Doug Kearns <dougk...@gmail.com>
-" Last Change: 2026 Mar 02
+" Last Change: 2026 Mar 04
" Former Maintainer: Charles E. Campbell
" DO NOT CHANGE DIRECTLY.
@@ -70,26 +70,26 @@ syn keyword vimOption contained efm errorformat ek esckeys ei eventignore eiw ev
syn keyword vimOption contained hi history hk hkmap hkp hkmapp hls hlsearch icon iconstring ic ignorecase imaf imactivatefunc imak imactivatekey imc imcmdline imd imdisable imi iminsert ims imsearch imsf imstatusfunc imst imstyle inc include inex includeexpr is incsearch inde indentexpr indk indentkeys inf infercase im insertmode isf isfname isi isident isk iskeyword isp isprint js joinspaces jop jumpoptions key kmp keymap km keymodel kpc keyprotocol kp keywordprg lmap langmap lm langmenu lnr langnoremap lrm langremap ls laststatus lz lazyredraw lhi lhistory lbr linebreak lines lsp linespace lisp lop lispoptions lw lispwords list lcs listchars lpl loadplugins luadll magic mef makeef menc makeencoding mp makeprg mps matchpairs mat matchtime mco maxcombine mfd maxfuncdepth skipwhite nextgroup=vimSetEqual,vimSetMod
syn keyword vimOption contained mmd maxmapdepth mm maxmem mmp maxmempattern mmt maxmemtot msc maxsearchcount mis menuitems mopt messagesopt msm mkspellmem ml modeline mle modelineexpr mls modelines ma modifiable mod modified more mouse mousef mousefocus mh mousehide mousem mousemodel mousemev mousemoveevent mouses mouseshape mouset mousetime mzq mzquantum mzschemedll mzschemegcdll nf nrformats nu number nuw numberwidth ofu omnifunc odev opendevice opfunc operatorfunc ost osctimeoutlen pp packpath para paragraphs paste pt pastetoggle pex patchexpr pm patchmode pa path perldll pi preserveindent pvh previewheight pvp previewpopup pvw previewwindow pdev printdevice penc printencoding pexpr printexpr pfn printfont pheader printheader pmbcs printmbcharset pmbfn printmbfont skipwhite nextgroup=vimSetEqual,vimSetMod
syn keyword vimOption contained popt printoptions prompt pb pumborder ph pumheight pmw pummaxwidth pw pumwidth pythondll pythonhome pythonthreedll pythonthreehome pyx pyxversion qftf quickfixtextfunc qe quoteescape ro readonly rdt redrawtime re regexpengine rnu relativenumber remap rop renderoptions report rs restorescreen ri revins rl rightleft rlc rightleftcmd rubydll ru ruler ruf rulerformat rtp runtimepath scr scroll scb scrollbind scf scrollfocus sj scrolljump so scrolloff sbo scrollopt sect sections secure sel selection slm selectmode ssop sessionoptions sh shell shcf shellcmdflag sp shellpipe shq shellquote srr shellredir ssl shellslash stmp shelltemp st shelltype sxe shellxescape sxq shellxquote sr shiftround sw shiftwidth shm shortmess sn shortname sbr showbreak skipwhite nextgroup=vimSetEqual,vimSetMod
-syn keyword vimOption contained sc showcmd sloc showcmdloc sft showfulltag sm showmatch smd showmode stal showtabline stpl showtabpanel ss sidescroll siso sidescrolloff scl signcolumn scs smartcase si smartindent sta smarttab sms smoothscroll sts softtabstop spell spc spellcapcheck spf spellfile spl spelllang spo spelloptions sps spellsuggest sb splitbelow spk splitkeep spr splitright sol startofline stl statusline stlo statuslineopt su suffixes sua suffixesadd swf swapfile sws swapsync swb switchbuf smc synmaxcol syn syntax tcl tabclose tal tabline tpm tabpagemax tpl tabpanel tplo tabpanelopt ts tabstop tbs tagbsearch tc tagcase tfu tagfunc tl taglength tr tagrelative tag tags tgst tagstack tcldll term tbidi termbidi tenc termencoding tgc termguicolors twk termwinkey skipwhite nextgroup=vimSetEqual,vimSetMod
-syn keyword vimOption contained twsl termwinscroll tws termwinsize twt termwintype terse ta textauto tx textmode tw textwidth tsr thesaurus tsrfu thesaurusfunc top tildeop to timeout tm timeoutlen title titlelen titleold titlestring tb toolbar tbis toolbariconsize ttimeout ttm ttimeoutlen tbi ttybuiltin tf ttyfast ttym ttymouse tsl ttyscroll tty ttytype udir undodir udf undofile ul undolevels ur undoreload uc updatecount ut updatetime vsts varsofttabstop vts vartabstop vbs verbose vfile verbosefile vdir viewdir vop viewoptions vi viminfo vif viminfofile ve virtualedit vb visualbell warn wiv weirdinvert ww whichwrap wc wildchar wcm wildcharm wig wildignore wic wildignorecase wmnu wildmenu wim wildmode wop wildoptions wak winaltkeys wcr wincolor wi window wfb winfixbuf skipwhite nextgroup=vimSetEqual,vimSetMod
-syn keyword vimOption contained wfh winfixheight wfw winfixwidth wh winheight whl winhighlight wmh winminheight wmw winminwidth winptydll wiw winwidth wse wlseat wst wlsteal wtm wltimeoutlen wrap wm wrapmargin ws wrapscan write wa writeany wb writebackup wd writedelay xtermcodes skipwhite nextgroup=vimSetEqual,vimSetMod
+syn keyword vimOption contained sc showcmd sloc showcmdloc sft showfulltag sm showmatch smd showmode stal showtabline stpl showtabpanel ss sidescroll siso sidescrolloff scl signcolumn scs smartcase si smartindent sta smarttab sms smoothscroll sts softtabstop spell spc spellcapcheck spf spellfile spl spelllang spo spelloptions sps spellsuggest sb splitbelow spk splitkeep spr splitright sol startofline stl statusline stlo statuslineopt su suffixes sua suffixesadd swf swapfile sws swapsync swb switchbuf smc synmaxcol syn syntax tcl tabclose tal tabline tpm tabpagemax tpl tabpanel tplo tabpanelopt ts tabstop tbs tagbsearch tc tagcase tfu tagfunc tl taglength tr tagrelative tag tags tgst tagstack tcldll term tbidi termbidi tenc termencoding tgc termguicolors tsy termsync skipwhite nextgroup=vimSetEqual,vimSetMod
+syn keyword vimOption contained twk termwinkey twsl termwinscroll tws termwinsize twt termwintype terse ta textauto tx textmode tw textwidth tsr thesaurus tsrfu thesaurusfunc top tildeop to timeout tm timeoutlen title titlelen titleold titlestring tb toolbar tbis toolbariconsize ttimeout ttm ttimeoutlen tbi ttybuiltin tf ttyfast ttym ttymouse tsl ttyscroll tty ttytype udir undodir udf undofile ul undolevels ur undoreload uc updatecount ut updatetime vsts varsofttabstop vts vartabstop vbs verbose vfile verbosefile vdir viewdir vop viewoptions vi viminfo vif viminfofile ve virtualedit vb visualbell warn wiv weirdinvert ww whichwrap wc wildchar wcm wildcharm wig wildignore wic wildignorecase wmnu wildmenu wim wildmode wop wildoptions wak winaltkeys wcr wincolor wi window skipwhite nextgroup=vimSetEqual,vimSetMod
+syn keyword vimOption contained wfb winfixbuf wfh winfixheight wfw winfixwidth wh winheight whl winhighlight wmh winminheight wmw winminwidth winptydll wiw winwidth wse wlseat wst wlsteal wtm wltimeoutlen wrap wm wrapmargin ws wrapscan write wa writeany wb writebackup wd writedelay xtermcodes skipwhite nextgroup=vimSetEqual,vimSetMod
" vimOptions: These are the turn-off setting variants {{{2
" GEN_SYN_VIM: vimOption turn-off, START_STR='syn keyword vimOption contained', END_STR=''
syn keyword vimOption contained noari noallowrevins noarab noarabic noarshape noarabicshape noacd noautochdir noac noautocomplete noai noautoindent noar noautoread noasd noautoshelldir noaw noautowrite noawa noautowriteall nobk nobackup nobeval noballooneval nobevalterm noballoonevalterm nobin nobinary nobomb nobri nobreakindent nobl nobuflisted nocdh nocdhome nocin nocindent nocp nocompatible nocf noconfirm noci nocopyindent nocsre nocscoperelative nocst nocscopetag nocsverb nocscopeverbose nocrb nocursorbind nocuc nocursorcolumn nocul nocursorline nodeco nodelcombine nodiff nodg nodigraph noed noedcompatible noemo noemoji noeof noendoffile noeol noendofline noea noequalalways noeb noerrorbells noek noesckeys noet noexpandtab noex noexrc nofic nofileignorecase
syn keyword vimOption contained nofixeol nofixendofline nofen nofoldenable nofs nofsync nogd nogdefault noguipty nohid nohidden nohk nohkmap nohkp nohkmapp nohls nohlsearch noicon noic noignorecase noimc noimcmdline noimd noimdisable nois noincsearch noinf noinfercase noim noinsertmode nojs nojoinspaces nolnr nolangnoremap nolrm nolangremap nolz nolazyredraw nolbr nolinebreak nolisp nolist nolpl noloadplugins nomagic noml nomodeline nomle nomodelineexpr noma nomodifiable nomod nomodified nomore nomousef nomousefocus nomh nomousehide nomousemev nomousemoveevent nonu nonumber noodev noopendevice nopaste nopi nopreserveindent nopvw nopreviewwindow noprompt noro noreadonly nornu norelativenumber noremap nors norestorescreen nori norevins norl norightleft noru noruler
-syn keyword vimOption contained noscb noscrollbind noscf noscrollfocus nosecure nossl noshellslash nostmp noshelltemp nosr noshiftround nosn noshortname nosc noshowcmd nosft noshowfulltag nosm noshowmatch nosmd noshowmode noscs nosmartcase nosi nosmartindent nosta nosmarttab nosms nosmoothscroll nospell nosb nosplitbelow nospr nosplitright nosol nostartofline noswf noswapfile notbs notagbsearch notr notagrelative notgst notagstack notbidi notermbidi notgc notermguicolors noterse nota notextauto notx notextmode notop notildeop noto notimeout notitle nottimeout notbi nottybuiltin notf nottyfast noudf noundofile novb novisualbell nowarn nowiv noweirdinvert nowic nowildignorecase nowmnu nowildmenu nowfb nowinfixbuf nowfh nowinfixheight nowfw nowinfixwidth nowst nowlsteal
-syn keyword vimOption contained nowrap nows nowrapscan nowrite nowa nowriteany nowb nowritebackup noxtermcodes
+syn keyword vimOption contained noscb noscrollbind noscf noscrollfocus nosecure nossl noshellslash nostmp noshelltemp nosr noshiftround nosn noshortname nosc noshowcmd nosft noshowfulltag nosm noshowmatch nosmd noshowmode noscs nosmartcase nosi nosmartindent nosta nosmarttab nosms nosmoothscroll nospell nosb nosplitbelow nospr nosplitright nosol nostartofline noswf noswapfile notbs notagbsearch notr notagrelative notgst notagstack notbidi notermbidi notgc notermguicolors notsy notermsync noterse nota notextauto notx notextmode notop notildeop noto notimeout notitle nottimeout notbi nottybuiltin notf nottyfast noudf noundofile novb novisualbell nowarn nowiv noweirdinvert nowic nowildignorecase nowmnu nowildmenu nowfb nowinfixbuf nowfh nowinfixheight nowfw nowinfixwidth
+syn keyword vimOption contained nowst nowlsteal nowrap nows nowrapscan nowrite nowa nowriteany nowb nowritebackup noxtermcodes
" vimOptions: These are the invertible variants {{{2
" GEN_SYN_VIM: vimOption invertible, START_STR='syn keyword vimOption contained', END_STR=''
syn keyword vimOption contained invari invallowrevins invarab invarabic invarshape invarabicshape invacd invautochdir invac invautocomplete invai invautoindent invar invautoread invasd invautoshelldir invaw invautowrite invawa invautowriteall invbk invbackup invbeval invballooneval invbevalterm invballoonevalterm invbin invbinary invbomb invbri invbreakindent invbl invbuflisted invcdh invcdhome invcin invcindent invcp invcompatible invcf invconfirm invci invcopyindent invcsre invcscoperelative invcst invcscopetag invcsverb invcscopeverbose invcrb invcursorbind invcuc invcursorcolumn invcul invcursorline invdeco invdelcombine invdiff invdg invdigraph inved invedcompatible invemo invemoji inveof invendoffile inveol invendofline invea invequalalways inveb inverrorbells
syn keyword vimOption contained invek invesckeys invet invexpandtab invex invexrc invfic invfileignorecase invfixeol invfixendofline invfen invfoldenable invfs invfsync invgd invgdefault invguipty invhid invhidden invhk invhkmap invhkp invhkmapp invhls invhlsearch invicon invic invignorecase invimc invimcmdline invimd invimdisable invis invincsearch invinf invinfercase invim invinsertmode invjs invjoinspaces invlnr invlangnoremap invlrm invlangremap invlz invlazyredraw invlbr invlinebreak invlisp invlist invlpl invloadplugins invmagic invml invmodeline invmle invmodelineexpr invma invmodifiable invmod invmodified invmore invmousef invmousefocus invmh invmousehide invmousemev invmousemoveevent invnu invnumber invodev invopendevice invpaste invpi invpreserveindent
-syn keyword vimOption contained invpvw invpreviewwindow invprompt invro invreadonly invrnu invrelativenumber invremap invrs invrestorescreen invri invrevins invrl invrightleft invru invruler invscb invscrollbind invscf invscrollfocus invsecure invssl invshellslash invstmp invshelltemp invsr invshiftround invsn invshortname invsc invshowcmd invsft invshowfulltag invsm invshowmatch invsmd invshowmode invscs invsmartcase invsi invsmartindent invsta invsmarttab invsms invsmoothscroll invspell invsb invsplitbelow invspr invsplitright invsol invstartofline invswf invswapfile invtbs invtagbsearch invtr invtagrelative invtgst invtagstack invtbidi invtermbidi invtgc invtermguicolors invterse invta invtextauto invtx invtextmode invtop invtildeop invto invtimeout invtitle
-syn keyword vimOption contained invttimeout invtbi invttybuiltin invtf invttyfast invudf invundofile invvb invvisualbell invwarn invwiv invweirdinvert invwic invwildignorecase invwmnu invwildmenu invwfb invwinfixbuf invwfh invwinfixheight invwfw invwinfixwidth invwst invwlsteal invwrap invws invwrapscan invwrite invwa invwriteany invwb invwritebackup invxtermcodes
+syn keyword vimOption contained invpvw invpreviewwindow invprompt invro invreadonly invrnu invrelativenumber invremap invrs invrestorescreen invri invrevins invrl invrightleft invru invruler invscb invscrollbind invscf invscrollfocus invsecure invssl invshellslash invstmp invshelltemp invsr invshiftround invsn invshortname invsc invshowcmd invsft invshowfulltag invsm invshowmatch invsmd invshowmode invscs invsmartcase invsi invsmartindent invsta invsmarttab invsms invsmoothscroll invspell invsb invsplitbelow invspr invsplitright invsol invstartofline invswf invswapfile invtbs invtagbsearch invtr invtagrelative invtgst invtagstack invtbidi invtermbidi invtgc invtermguicolors invtsy invtermsync invterse invta invtextauto invtx invtextmode invtop invtildeop invto invtimeout
+syn keyword vimOption contained invtitle invttimeout invtbi invttybuiltin invtf invttyfast invudf invundofile invvb invvisualbell invwarn invwiv invweirdinvert invwic invwildignorecase invwmnu invwildmenu invwfb invwinfixbuf invwfh invwinfixheight invwfw invwinfixwidth invwst invwlsteal invwrap invws invwrapscan invwrite invwa invwriteany invwb invwritebackup invxtermcodes
" termcap codes (which can also be set) {{{2
" GEN_SYN_VIM: vimOption term output code, START_STR='syn keyword vimOption contained', END_STR='skipwhite nextgroup=vimSetEqual,vimSetMod'
-syn keyword vimOption contained t_AB t_AF t_AU t_AL t_al t_bc t_BE t_BD t_cd t_ce t_Ce t_CF t_cl t_cm t_Co t_CS t_Cs t_cs t_CV t_da t_db t_DL t_dl t_ds t_Ds t_EC t_EI t_fs t_fd t_fe t_GP t_IE t_IS t_ke t_ks t_le t_mb t_md t_me t_mr t_ms t_nd t_op t_RF t_RB t_RC t_RI t_Ri t_RK t_RS t_RT t_RV t_Sb t_SC t_se t_Sf t_SH t_SI t_Si t_so t_SR t_sr t_ST t_Te t_te t_TE t_ti t_TI t_Ts t_ts t_u7 t_ue t_us t_Us t_ut t_vb t_ve t_vi t_VS t_vs t_WP t_WS t_XM t_xn t_xs t_ZH t_ZR t_8f t_8b t_8u t_xo skipwhite nextgroup=vimSetEqual,vimSetMod
+syn keyword vimOption contained t_AB t_AF t_AU t_AL t_al t_bc t_BE t_BD t_cd t_ce t_Ce t_CF t_cl t_cm t_Co t_CS t_Cs t_cs t_CV t_da t_db t_DL t_dl t_ds t_Ds t_EC t_EI t_fs t_fd t_fe t_GP t_IE t_IS t_ke t_ks t_le t_mb t_md t_me t_mr t_ms t_nd t_op t_RF t_RB t_RC t_RI t_Ri t_RK t_RS t_RT t_RV t_Sb t_SC t_se t_Sf t_SH t_SI t_Si t_so t_SR t_sr t_ST t_Te t_te t_TE t_ti t_TI t_Ts t_ts t_u7 t_ue t_us t_Us t_ut t_vb t_ve t_vi t_VS t_vs t_WP t_WS t_XM t_xn t_xs t_ZH t_ZR t_8f t_8b t_8u t_xo t_BS t_ES skipwhite nextgroup=vimSetEqual,vimSetMod
" term key codes
syn keyword vimOption contained t_F1 t_F2 t_F3 t_F4 t_F5 t_F6 t_F7 t_F8 t_F9 t_k1 t_K1 t_k2 t_k3 t_K3 t_k4 t_K4 t_k5 t_K5 t_k6 t_K6 t_k7 t_K7 t_k8 t_K8 t_k9 t_K9 t_KA t_kb t_kB t_KB t_KC t_kd t_kD t_KD t_KE t_KF t_KG t_kh t_KH t_kI t_KI t_KJ t_KK t_kl t_KL t_kN t_kP t_kr t_ku
syn match vimOption contained "t_%1"
@@ -110,10 +110,10 @@ syn keyword vimOptionVarName contained hi history hk hkmap hkp hkmapp hls hlsear
syn keyword vimOptionVarName contained mfd maxfuncdepth mmd maxmapdepth mm maxmem mmp maxmempattern mmt maxmemtot msc maxsearchcount mis menuitems mopt messagesopt msm mkspellmem ml modeline mle modelineexpr mls modelines ma modifiable mod modified more mouse mousef mousefocus mh mousehide mousem mousemodel mousemev mousemoveevent mouses mouseshape mouset mousetime mzq mzquantum mzschemedll mzschemegcdll nf nrformats nu number nuw numberwidth ofu omnifunc odev opendevice opfunc operatorfunc ost osctimeoutlen pp packpath para paragraphs paste pt pastetoggle pex patchexpr pm patchmode pa path perldll pi preserveindent pvh previewheight pvp previewpopup pvw previewwindow pdev printdevice penc printencoding pexpr printexpr pfn printfont pheader printheader pmbcs printmbcharset
syn keyword vimOptionVarName contained pmbfn printmbfont popt printoptions prompt pb pumborder ph pumheight pmw pummaxwidth pw pumwidth pythondll pythonhome pythonthreedll pythonthreehome pyx pyxversion qftf quickfixtextfunc qe quoteescape ro readonly rdt redrawtime re regexpengine rnu relativenumber remap rop renderoptions report rs restorescreen ri revins rl rightleft rlc rightleftcmd rubydll ru ruler ruf rulerformat rtp runtimepath scr scroll scb scrollbind scf scrollfocus sj scrolljump so scrolloff sbo scrollopt sect sections secure sel selection slm selectmode ssop sessionoptions sh shell shcf shellcmdflag sp shellpipe shq shellquote srr shellredir ssl shellslash stmp shelltemp st shelltype sxe shellxescape sxq shellxquote sr shiftround sw shiftwidth shm shortmess
syn keyword vimOptionVarName contained sn shortname sbr showbreak sc showcmd sloc showcmdloc sft showfulltag sm showmatch smd showmode stal showtabline stpl showtabpanel ss sidescroll siso sidescrolloff scl signcolumn scs smartcase si smartindent sta smarttab sms smoothscroll sts softtabstop spell spc spellcapcheck spf spellfile spl spelllang spo spelloptions sps spellsuggest sb splitbelow spk splitkeep spr splitright sol startofline stl statusline stlo statuslineopt su suffixes sua suffixesadd swf swapfile sws swapsync swb switchbuf smc synmaxcol syn syntax tcl tabclose tal tabline tpm tabpagemax tpl tabpanel tplo tabpanelopt ts tabstop tbs tagbsearch tc tagcase tfu tagfunc tl taglength tr tagrelative tag tags tgst tagstack tcldll term tbidi termbidi tenc termencoding
-syn keyword vimOptionVarName contained tgc termguicolors twk termwinkey twsl termwinscroll tws termwinsize twt termwintype terse ta textauto tx textmode tw textwidth tsr thesaurus tsrfu thesaurusfunc top tildeop to timeout tm timeoutlen title titlelen titleold titlestring tb toolbar tbis toolbariconsize ttimeout ttm ttimeoutlen tbi ttybuiltin tf ttyfast ttym ttymouse tsl ttyscroll tty ttytype udir undodir udf undofile ul undolevels ur undoreload uc updatecount ut updatetime vsts varsofttabstop vts vartabstop vbs verbose vfile verbosefile vdir viewdir vop viewoptions vi viminfo vif viminfofile ve virtualedit vb visualbell warn wiv weirdinvert ww whichwrap wc wildchar wcm wildcharm wig wildignore wic wildignorecase wmnu wildmenu wim wildmode wop wildoptions wak winaltkeys
-syn keyword vimOptionVarName contained wcr wincolor wi window wfb winfixbuf wfh winfixheight wfw winfixwidth wh winheight whl winhighlight wmh winminheight wmw winminwidth winptydll wiw winwidth wse wlseat wst wlsteal wtm wltimeoutlen wrap wm wrapmargin ws wrapscan write wa writeany wb writebackup wd writedelay xtermcodes
+syn keyword vimOptionVarName contained tgc termguicolors tsy termsync twk termwinkey twsl termwinscroll tws termwinsize twt termwintype terse ta textauto tx textmode tw textwidth tsr thesaurus tsrfu thesaurusfunc top tildeop to timeout tm timeoutlen title titlelen titleold titlestring tb toolbar tbis toolbariconsize ttimeout ttm ttimeoutlen tbi ttybuiltin tf ttyfast ttym ttymouse tsl ttyscroll tty ttytype udir undodir udf undofile ul undolevels ur undoreload uc updatecount ut updatetime vsts varsofttabstop vts vartabstop vbs verbose vfile verbosefile vdir viewdir vop viewoptions vi viminfo vif viminfofile ve virtualedit vb visualbell warn wiv weirdinvert ww whichwrap wc wildchar wcm wildcharm wig wildignore wic wildignorecase wmnu wildmenu wim wildmode wop wildoptions
+syn keyword vimOptionVarName contained wak winaltkeys wcr wincolor wi window wfb winfixbuf wfh winfixheight wfw winfixwidth wh winheight whl winhighlight wmh winminheight wmw winminwidth winptydll wiw winwidth wse wlseat wst wlsteal wtm wltimeoutlen wrap wm wrapmargin ws wrapscan write wa writeany wb writebackup wd writedelay xtermcodes
" GEN_SYN_VIM: vimOption term output code variable, START_STR='syn keyword vimOptionVarName contained', END_STR=''
-syn keyword vimOptionVarName contained t_AB t_AF t_AU t_AL t_al t_bc t_BE t_BD t_cd t_ce t_Ce t_CF t_cl t_cm t_Co t_CS t_Cs t_cs t_CV t_da t_db t_DL t_dl t_ds t_Ds t_EC t_EI t_fs t_fd t_fe t_GP t_IE t_IS t_ke t_ks t_le t_mb t_md t_me t_mr t_ms t_nd t_op t_RF t_RB t_RC t_RI t_Ri t_RK t_RS t_RT t_RV t_Sb t_SC t_se t_Sf t_SH t_SI t_Si t_so t_SR t_sr t_ST t_Te t_te t_TE t_ti t_TI t_Ts t_ts t_u7 t_ue t_us t_Us t_ut t_vb t_ve t_vi t_VS t_vs t_WP t_WS t_XM t_xn t_xs t_ZH t_ZR t_8f t_8b t_8u t_xo
+syn keyword vimOptionVarName contained t_AB t_AF t_AU t_AL t_al t_bc t_BE t_BD t_cd t_ce t_Ce t_CF t_cl t_cm t_Co t_CS t_Cs t_cs t_CV t_da t_db t_DL t_dl t_ds t_Ds t_EC t_EI t_fs t_fd t_fe t_GP t_IE t_IS t_ke t_ks t_le t_mb t_md t_me t_mr t_ms t_nd t_op t_RF t_RB t_RC t_RI t_Ri t_RK t_RS t_RT t_RV t_Sb t_SC t_se t_Sf t_SH t_SI t_Si t_so t_SR t_sr t_ST t_Te t_te t_TE t_ti t_TI t_Ts t_ts t_u7 t_ue t_us t_Us t_ut t_vb t_ve t_vi t_VS t_vs t_WP t_WS t_XM t_xn t_xs t_ZH t_ZR t_8f t_8b t_8u t_xo t_BS t_ES
syn keyword vimOptionVarName contained t_F1 t_F2 t_F3 t_F4 t_F5 t_F6 t_F7 t_F8 t_F9 t_k1 t_K1 t_k2 t_k3 t_K3 t_k4 t_K4 t_k5 t_K5 t_k6 t_K6 t_k7 t_K7 t_k8 t_K8 t_k9 t_K9 t_KA t_kb t_kB t_KB t_KC t_kd t_kD t_KD t_KE t_KF t_KG t_kh t_KH t_kI t_KI t_KJ t_KK t_kl t_KL t_kN t_kP t_kr t_ku
syn match vimOptionVarName contained "t_%1"
syn match vimOptionVarName contained "t_#2"
diff --git a/src/drawscreen.c b/src/drawscreen.c
index 8c985394a..92fd9a62c 100644
--- a/src/drawscreen.c
+++ b/src/drawscreen.c
@@ -160,6 +160,8 @@ update_screen(int type_arg)
}
updating_screen = TRUE;
+ term_set_sync_output(TERM_SYNC_OUTPUT_ENABLE);
+
#ifdef FEAT_PROP_POPUP
// Update popup_mask if needed. This may set w_redraw_top and w_redraw_bot
// in some windows.
@@ -434,6 +436,8 @@ update_screen(int type_arg)
redraw_listener_cleanup();
#endif
+ term_set_sync_output(TERM_SYNC_OUTPUT_DISABLE);
+
return OK;
}
diff --git a/src/getchar.c b/src/getchar.c
index eaa766795..e825498c5 100644
--- a/src/getchar.c
+++ b/src/getchar.c
@@ -1725,6 +1725,9 @@ using_script(void)
void
before_blocking(void)
{
+ // Tell terminal to flush screen contents before blocking
+ term_set_sync_output(TERM_SYNC_OUTPUT_FLUSH);
+
updatescript(0);
#ifdef FEAT_EVAL
if (may_garbage_collect)
diff --git a/src/gui.c b/src/gui.c
index a805c1423..698c7c2b3 100644
--- a/src/gui.c
+++ b/src/gui.c
@@ -148,8 +148,11 @@ gui_start(char_u *arg UNUSED)
}
#ifdef HAVE_CLIPMETHOD
else
+ {
// Reset clipmethod to CLIPMETHOD_NONE
choose_clipmethod();
+ term_set_sync_output(TERM_SYNC_OUTPUT_OFF);
+ }
#endif
#if defined(FEAT_SOCKETSERVER) && defined(FEAT_GUI_GTK)
diff --git a/src/main.c b/src/main.c
index c31b14d0c..ec046f3b2 100644
--- a/src/main.c
+++ b/src/main.c
@@ -892,6 +892,8 @@ vim_main2(void)
may_req_termresponse();
may_req_bg_color();
+
+ may_req_sync_output();
# endif
// start in insert mode
@@ -1855,6 +1857,8 @@ getout(int exitval)
free_cmd_argsW();
#endif
+ term_set_sync_output(TERM_SYNC_OUTPUT_OFF);
+
mch_exit(exitval);
}
diff --git a/src/option.c b/src/option.c
index 8de0d9c68..a56dfa3ae 100644
--- a/src/option.c
+++ b/src/option.c
@@ -4409,6 +4409,14 @@ did_set_termguicolors(optset_T *args UNUSED)
}
#endif
+ char *
+did_set_termsync(optset_T *args UNUSED)
+{
+ if (!p_tsy)
+ term_set_sync_output(TERM_SYNC_OUTPUT_OFF);
+ return NULL;
+}
+
#if defined(FEAT_TERMINAL)
/*
* Process the updated 'termwinscroll' option value.
diff --git a/src/option.h b/src/option.h
index fddc3905c..5f656f9b1 100644
--- a/src/option.h
+++ b/src/option.h
@@ -1035,6 +1035,7 @@ EXTERN char_u *p_tenc; // 'termencoding'
#ifdef FEAT_TERMGUICOLORS
EXTERN int p_tgc; // 'termguicolors'
#endif
+EXTERN int p_tsy; // 'termsync'
#ifdef FEAT_TERMINAL
EXTERN long p_twsl; // 'termwinscroll'
#endif
diff --git a/src/optiondefs.h b/src/optiondefs.h
index 2a2b1c0da..6ab34ff9e 100644
--- a/src/optiondefs.h
+++ b/src/optiondefs.h
@@ -2661,6 +2661,9 @@ static struct vimoption options[] =
{(char_u *)FALSE, (char_u *)FALSE}
#endif
SCTX_INIT},
+ {"termsync", "tsy", P_BOOL|P_VI_DEF,
+ (char_u *)&p_tsy, PV_NONE, did_set_termsync, NULL,
+ {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
{"termwinkey", "twk", P_STRING|P_ALLOCED|P_RWIN|P_VI_DEF,
#ifdef FEAT_TERMINAL
(char_u *)VAR_WIN, PV_TWK, did_set_termwinkey, NULL,
@@ -3161,6 +3164,8 @@ static struct vimoption options[] =
p_term("t_8b", T_8B)
p_term("t_8u", T_8U)
p_term("t_xo", T_XON)
+ p_term("t_BS", T_BSU)
+ p_term("t_ES", T_ESU)
// terminal key codes are not in here
diff --git a/src/optionstr.c b/src/optionstr.c
index 7fb8bf548..a34d86a01 100644
--- a/src/optionstr.c
+++ b/src/optionstr.c
@@ -4456,6 +4456,9 @@ did_set_term_option(optset_T *args)
out_str(T_BE);
}
+ if (varp == &T_BSU || varp == &T_ESU)
+ term_set_sync_output(TERM_SYNC_OUTPUT_OFF);
+
return NULL;
}
diff --git a/src/po/vim.pot b/src/po/vim.pot
index f56581d18..32898088c 100644
--- a/src/po/vim.pot
+++ b/src/po/vim.pot
@@ -8,7 +8,7 @@ msgid ""
msgstr ""
"Project-Id-Version: Vim
"
"Report-Msgid-Bugs-To: vim...@vim.org
"
-"POT-Creation-Date: 2026-03-02 19:53+0000
"
+"POT-Creation-Date: 2026-03-04 21:06+0000
"
"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE
"
"Last-Translator: FULL NAME <EMAIL@ADDRESS>
"
"Language-Team: LANGUAGE <L...@li.org>
"
@@ -9445,6 +9445,9 @@ msgstr ""
msgid "don't redraw while executing macros"
msgstr ""
+msgid "enable terminal sync mode"
+msgstr ""
+
msgid "timeout for 'hlsearch' and :match highlighting in msec"
msgstr ""
diff --git a/src/proto/option.pro b/src/proto/option.pro
index 4fa8935c0..892a6ce3b 100644
--- a/src/proto/option.pro
+++ b/src/proto/option.pro
@@ -72,6 +72,7 @@ char *did_set_smoothscroll(optset_T *args);
char *did_set_spell(optset_T *args);
char *did_set_swapfile(optset_T *args);
char *did_set_termguicolors(optset_T *args);
+char *did_set_termsync(optset_T *args);
char *did_set_termwinscroll(optset_T *args);
char *did_set_terse(optset_T *args);
char *did_set_textauto(optset_T *args);
diff --git a/src/proto/term.pro b/src/proto/term.pro
index b831bc181..862864b39 100644
--- a/src/proto/term.pro
+++ b/src/proto/term.pro
@@ -96,4 +96,6 @@ void swap_tcap(void);
void ansi_color2rgb(int nr, char_u *r, char_u *g, char_u *b, char_u *ansi_idx);
void cterm_color2rgb(int nr, char_u *r, char_u *g, char_u *b, char_u *ansi_idx);
int term_replace_keycodes(char_u *ta_buf, int ta_len, int len_arg);
+void may_req_sync_output(void);
+void term_set_sync_output(int flags);
/* vim: set ft=c : */
diff --git a/src/structs.h b/src/structs.h
index b0b559e8a..2e0aaa31a 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -5329,3 +5329,12 @@ typedef enum {
# endif
#endif
+
+// Used in term_set_sync_output()
+typedef enum
+{
+ TERM_SYNC_OUTPUT_ENABLE = 1 << 0,
+ TERM_SYNC_OUTPUT_DISABLE = 1 << 1,
+ TERM_SYNC_OUTPUT_OFF = 1 << 2,
+ TERM_SYNC_OUTPUT_FLUSH = 1 << 3,
+} term_sync_output_T;
diff --git a/src/term.c b/src/term.c
index 39f63fa95..5e8b0945c 100644
--- a/src/term.c
+++ b/src/term.c
@@ -130,6 +130,9 @@ static termrequest_T u7_status = TERMREQUEST_INIT;
// Request xterm compatibility check:
static termrequest_T xcc_status = TERMREQUEST_INIT;
+// Request synchronized output report
+static termrequest_T sync_output_status = TERMREQUEST_INIT;
+
#ifdef FEAT_TERMRESPONSE
# ifdef FEAT_TERMINAL
// Request foreground color report:
@@ -165,6 +168,7 @@ static termrequest_T *all_termrequests[] = {
&rbm_status,
&rcs_status,
&winpos_status,
+ &sync_output_status,
NULL
};
@@ -224,6 +228,24 @@ static int initial_cursor_shape_blink = FALSE;
static int initial_cursor_blink = FALSE;
#endif
+// 0 Mode is not recognized not supported
+//
+// 1 Set supported and screen updates are not shown to
+// the user until mode is disabled
+//
+// 2 Reset supported and screen updates are shown as usual
+// (e.g. as soon as they arrive)
+//
+// 3 Permanently set undefined
+//
+// 4 Permanently reset not supported
+//
+static int sync_output_setting = 0;
+
+// > 0: Currently batching output
+// == 0: No synchronized output
+static int sync_output_state = 0;
+
/*
* The builtin termcap entries.
*
@@ -2185,6 +2207,14 @@ set_termname(char_u *term)
&& (T_CRV == NULL || *T_CRV == NUL))
T_CRV = (char_u *)" [>c";
+ // These are the DECSET/DECRESET codes for synchronized output. iTerm
+ // supports another way, but this is the de facto standard terminal codes
+ // that are used (from what I can tell - 64bitman).
+ if (T_BSU == NULL || T_BSU == empty_option)
+ T_BSU = (char_u *)" [?2026h";
+ if (T_ESU == NULL || T_ESU == empty_option)
+ T_ESU = (char_u *)" [?2026l";
+
#ifdef UNIX
/*
* Any "stty" settings override the default for t_kb from the termcap.
@@ -5564,6 +5594,8 @@ handle_csi_function_key(
*
* - DA1 query response: {lead}?...;c
*
+ * - DEC mode 2026 response (synchronized output): {lead}?2026;{mode}$y
+ *
* Return 0 for no match, -1 for partial match, > 0 for full match.
*/
static int
@@ -5692,6 +5724,28 @@ handle_csi(
key_name[1] = (int)KE_IGNORE;
}
+ // DEC 2026 mode response (for 'termsync' option)
+ else if (first == '?' && trail == 'y' && argc == 2 && arg[0] == 2026)
+ {
+ int setting = arg[1];
+
+ *slen = csi_len;
+ key_name[0] = (int)KS_EXTRA;
+ key_name[1] = (int)KE_IGNORE;
+
+ if (setting >= 0 && setting <= 4)
+ {
+ sync_output_setting = setting;
+ LOG_TRN("Received DEC 2026 mode: %s", tp);
+ sync_output_status.tr_progress = STATUS_GOT;
+
+ set_option_value_give_err((char_u *)"termsync",
+ setting == 1 || setting == 2, NULL, 0);
+ }
+ else
+ LOG_TRN("Unknown synchronized output setting %d", setting);
+ }
+
// Version string: Eat it when there is at least one digit and
// it ends in 'c'
else if (*T_CRV != NUL && ap > argp + 1 && trail == 'c')
@@ -7798,3 +7852,95 @@ term_replace_keycodes(char_u *ta_buf, int ta_len, int len_arg)
}
return len;
}
+
+#ifdef FEAT_TERMRESPONSE
+/*
+ * Query the setting for DEC mode 2026 (synchronized output) from the terminal.
+ */
+ void
+may_req_sync_output(void)
+{
+ if (can_get_termresponse() && starting == 0
+ && sync_output_status.tr_progress == STATUS_GET)
+ {
+ MAY_WANT_TO_LOG_THIS;
+ LOG_TR1("Sending synchronized output request");
+
+ out_str((char_u *)" [?2026$p");
+ termrequest_sent(&sync_output_status);
+
+ // check for the characters now, otherwise they might be eaten by
+ // get_keystroke()
+ out_flush();
+ (void)vpeekc_nomap();
+ }
+
+}
+#endif
+
+/*
+ * Enable or disable synchronized output if possible. Specification can be found
+ * here:
+ * https://github.com/contour-terminal/vt-extensions/blob/master/synchronized-output.md
+ */
+ void
+term_set_sync_output(int flags)
+{
+ bool allowed;
+ char_u *str;
+#ifdef FEAT_GUI
+ bool in_gui = gui.in_use;
+#else
+ bool in_gui = false;
+#endif
+
+ allowed = p_tsy && (sync_output_setting == 1 || sync_output_setting == 2);
+
+ if (flags & TERM_SYNC_OUTPUT_FLUSH)
+ {
+ // Tell terminal to display screen contents
+ if (allowed && !in_gui && sync_output_state > 0 && *T_ESU != NUL &&
+ *T_BSU != NUL)
+ {
+ out_str((char_u *)T_ESU);
+ out_str((char_u *)T_BSU);
+ }
+ return;
+ }
+
+ // Forcibly turn off synchronized output (e.g. 'notermsync')
+ if (flags & TERM_SYNC_OUTPUT_OFF)
+ {
+ if (sync_output_state > 0 && *T_ESU != NUL)
+ {
+ out_str((char_u *)T_ESU);
+ sync_output_state = 0;
+ }
+ return;
+ }
+
+ if (!allowed || in_gui || *T_BSU == NUL || *T_ESU == NUL)
+ return;
+
+ // Only enable if we aren't already, and only disable if we have reached
+ // zero.
+ if (flags & TERM_SYNC_OUTPUT_ENABLE)
+ {
+ if (sync_output_state++ > 0)
+ return;
+ str = T_BSU;
+ }
+ else if (flags & TERM_SYNC_OUTPUT_DISABLE)
+ {
+ if (sync_output_state == 0 || --sync_output_state > 0)
+ return;
+ str = T_ESU;
+ }
+ else
+ {
+ siemsg("Unknown sync output value %d", flags);
+ return;
+ }
+
+ out_str((char_u *)str);
+}
diff --git a/src/termdefs.h b/src/termdefs.h
index d611fcf44..7c15c26c1 100644
--- a/src/termdefs.h
+++ b/src/termdefs.h
@@ -116,10 +116,12 @@ enum SpecialKey
KS_FD, // disable focus event tracking
KS_FE, // enable focus event tracking
KS_CF, // set terminal alternate font
- KS_XON // terminal uses xon/xoff handshaking
+ KS_XON, // terminal uses xon/xoff handshaking
+ KS_BSU, // begin synchronized update
+ KS_ESU // end synchronized update
};
-#define KS_LAST KS_XON
+#define KS_LAST KS_ESU
/*
* the terminal capabilities are stored in this array
@@ -226,6 +228,8 @@ extern char_u *(term_strings[]); // current terminal strings
#define T_FD (TERM_STR(KS_FD)) // disable focus event tracking
#define T_FE (TERM_STR(KS_FE)) // enable focus event tracking
#define T_XON (TERM_STR(KS_XON)) // terminal uses xon/xoff handshaking
+#define T_BSU (TERM_STR(KS_BSU)) // begin synchronized update
+#define T_ESU (TERM_STR(KS_ESU)) // end synchronized update
typedef enum {
TMODE_COOK, // terminal mode for external cmds and Ex mode
diff --git a/src/testdir/test_options.vim b/src/testdir/test_options.vim
index dc1399793..bca393b1a 100644
--- a/src/testdir/test_options.vim
+++ b/src/testdir/test_options.vim
@@ -318,7 +318,7 @@ func Test_set_completion()
" Expand abbreviation of options.
call feedkeys(":set ts\<C-A>\<C-B>\"\<CR>", 'tx')
- call assert_equal('"set tabstop thesaurus thesaurusfunc ttyscroll', @:)
+ call assert_equal('"set tabstop termsync thesaurus thesaurusfunc ttyscroll', @:)
" Expand current value
call feedkeys(":set suffixes=\<C-A>\<C-B>\"\<CR>", 'tx')
diff --git a/src/version.c b/src/version.c
index 39821b752..0590e75f7 100644
--- a/src/version.c
+++ b/src/version.c
@@ -734,6 +734,8 @@ static char *(features[]) =
static int included_patches[] =
{ /* Add new patch number below this line */
+/**/
+ 110,
/**/
109,
/**/
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