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vim-patch:8556e23: runtime(java): Provide support for syntax preview features

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Introduce a new API variable "g:java_syntax_previews" whose
value must be a list of syntax preview feature numbers.

Enumerate the currently supported numbers in a table at the
end of the documentation entry for "ft-java-syntax".

Also, disable the recognition of String Templates.  Despite
the withdrawal of this preview feature in its proposed form
from the upcoming JDK 23 release and the fact that the JDK
22 release is coming to EOL this September, an earlier
iteration of this preview feature was included in JDK 21
(LTS) whose EOL is projected to fall due in late 2028 and,
therefore, retain the current implementation.

Define "g:java_syntax_previews" and include number 430 in
its list to enable the recognition of String Templates:
------------------------------------------------------------
	let g:java_syntax_previews = [430]
------------------------------------------------------------

References:
https://openjdk.org/jeps/430 (Preview)
https://openjdk.org/jeps/459 (Second Preview)
https://openjdk.org/jeps/465 (Third Preview)
https://mail.openjdk.org/pipermail/amber-spec-experts/2024-April/004106.html

closes: vim/vim#15579

8556e23ee9

Co-authored-by: Aliaksei Budavei <0x000c70@gmail.com>
This commit is contained in:
Christian Clason 2024-08-28 10:21:59 +02:00
parent 3bcd5624be
commit 3a61f05dd2
2 changed files with 39 additions and 11 deletions
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16
runtime/doc/syntax.txt
View File

@ -1692,6 +1692,22 @@ This will make the syntax synchronization start 50 lines before the first
displayed line. The default value is 10. The disadvantage of using a larger
number is that redrawing can become slow.
Significant changes to the Java platform are gradually introduced in the form
of JDK Enhancement Proposals (JEPs) that can be implemented for a release and
offered as its preview features. It may take several JEPs and a few release
cycles for such a feature to become either integrated into the platform or
withdrawn from this effort. To cater for early adopters, there is optional
support in Vim for syntax related preview features that are implemented. You
can request it by specifying a list of preview feature numbers as follows: >
:let g:java_syntax_previews = [430]
The supported JEP numbers are to be drawn from this table:
`430`: String Templates [JDK 21]
Note that as soon as the particular preview feature will have been integrated
into the Java platform, its entry will be removed from the table and related
optionality will be discontinued.
JSON *json.vim* *ft-json-syntax* *g:vim_json_conceal*
*g:vim_json_warnings*

34
runtime/syntax/java.vim
View File

@ -3,7 +3,7 @@
" Maintainer: Aliaksei Budavei <0x000c70 AT gmail DOT com>
" Former Maintainer: Claudio Fleiner <claudio@fleiner.com>
" Repository: https://github.com/zzzyxwvut/java-vim.git
" Last Change: 2024 Aug 22
" Last Change: 2024 Aug 26
" Please check :help java.vim for comments on some of the options available.
@ -30,6 +30,10 @@ function! s:ff.RightConstant(x, y) abort
return a:y
endfunction
function! s:ff.IsRequestedPreviewFeature(n) abort
return exists("g:java_syntax_previews") && index(g:java_syntax_previews, a:n) + 1
endfunction
if !exists("*s:ReportOnce")
function s:ReportOnce(message) abort
echomsg 'syntax/java.vim: ' . a:message
@ -367,9 +371,14 @@ syn match javaSpecialChar contained "\\\%(u\x\x\x\x\|[0-3]\o\o\|\o\o\=\|[bstnf
syn region javaString start=+"+ end=+"+ end=+$+ contains=javaSpecialChar,javaSpecialError,@Spell
syn region javaString start=+"""[ \t\x0c\r]*$+hs=e+1 end=+"""+he=s-1 contains=javaSpecialChar,javaSpecialError,javaTextBlockError,@Spell
syn match javaTextBlockError +"""\s*"""+
syn region javaStrTemplEmbExp contained matchgroup=javaStrTempl start="\\{" end="}" contains=TOP
exec 'syn region javaStrTempl start=+\%(\.[[:space:]\n]*\)\@' . s:ff.Peek('80', '') . '<="+ end=+"+ contains=javaStrTemplEmbExp,javaSpecialChar,javaSpecialError,@Spell'
exec 'syn region javaStrTempl start=+\%(\.[[:space:]\n]*\)\@' . s:ff.Peek('80', '') . '<="""[ \t\x0c\r]*$+hs=e+1 end=+"""+he=s-1 contains=javaStrTemplEmbExp,javaSpecialChar,javaSpecialError,javaTextBlockError,@Spell'
if s:ff.IsRequestedPreviewFeature(430)
syn region javaStrTemplEmbExp contained matchgroup=javaStrTempl start="\\{" end="}" contains=TOP
exec 'syn region javaStrTempl start=+\%(\.[[:space:]\n]*\)\@' . s:ff.Peek('80', '') . '<="+ end=+"+ contains=javaStrTemplEmbExp,javaSpecialChar,javaSpecialError,@Spell'
exec 'syn region javaStrTempl start=+\%(\.[[:space:]\n]*\)\@' . s:ff.Peek('80', '') . '<="""[ \t\x0c\r]*$+hs=e+1 end=+"""+he=s-1 contains=javaStrTemplEmbExp,javaSpecialChar,javaSpecialError,javaTextBlockError,@Spell'
hi def link javaStrTempl Macro
endif
syn match javaCharacter "'[^']*'" contains=javaSpecialChar,javaSpecialCharError
syn match javaCharacter "'\\''" contains=javaSpecialChar
syn match javaCharacter "'[^\\]'"
@ -441,11 +450,16 @@ if exists("g:java_highlight_debug")
syn match javaDebugSpecial contained "\\\%(u\x\x\x\x\|[0-3]\o\o\|\o\o\=\|[bstnfr"'\\]\)"
syn region javaDebugString contained start=+"+ end=+"+ contains=javaDebugSpecial
syn region javaDebugString contained start=+"""[ \t\x0c\r]*$+hs=e+1 end=+"""+he=s-1 contains=javaDebugSpecial,javaDebugTextBlockError
" The highlight groups of java{StrTempl,Debug{,Paren,StrTempl}}\,
" share one colour by default. Do not conflate unrelated parens.
syn region javaDebugStrTemplEmbExp contained matchgroup=javaDebugStrTempl start="\\{" end="}" contains=javaComment,javaLineComment,javaDebug\%(Paren\)\@!.*
exec 'syn region javaDebugStrTempl contained start=+\%(\.[[:space:]\n]*\)\@' . s:ff.Peek('80', '') . '<="+ end=+"+ contains=javaDebugStrTemplEmbExp,javaDebugSpecial'
exec 'syn region javaDebugStrTempl contained start=+\%(\.[[:space:]\n]*\)\@' . s:ff.Peek('80', '') . '<="""[ \t\x0c\r]*$+hs=e+1 end=+"""+he=s-1 contains=javaDebugStrTemplEmbExp,javaDebugSpecial,javaDebugTextBlockError'
if s:ff.IsRequestedPreviewFeature(430)
" The highlight groups of java{StrTempl,Debug{,Paren,StrTempl}}\,
" share one colour by default. Do not conflate unrelated parens.
syn region javaDebugStrTemplEmbExp contained matchgroup=javaDebugStrTempl start="\\{" end="}" contains=javaComment,javaLineComment,javaDebug\%(Paren\)\@!.*
exec 'syn region javaDebugStrTempl contained start=+\%(\.[[:space:]\n]*\)\@' . s:ff.Peek('80', '') . '<="+ end=+"+ contains=javaDebugStrTemplEmbExp,javaDebugSpecial'
exec 'syn region javaDebugStrTempl contained start=+\%(\.[[:space:]\n]*\)\@' . s:ff.Peek('80', '') . '<="""[ \t\x0c\r]*$+hs=e+1 end=+"""+he=s-1 contains=javaDebugStrTemplEmbExp,javaDebugSpecial,javaDebugTextBlockError'
hi def link javaDebugStrTempl Macro
endif
syn match javaDebugTextBlockError contained +"""\s*"""+
syn match javaDebugCharacter contained "'[^\\]'"
syn match javaDebugSpecialCharacter contained "'\\.'"
@ -471,7 +485,6 @@ if exists("g:java_highlight_debug")
hi def link javaDebug Debug
hi def link javaDebugString DebugString
hi def link javaDebugStrTempl Macro
hi def link javaDebugTextBlockError Error
hi def link javaDebugType DebugType
hi def link javaDebugBoolean DebugBoolean
@ -580,7 +593,6 @@ hi def link javaSpecial Special
hi def link javaSpecialError Error
hi def link javaSpecialCharError Error
hi def link javaString String
hi def link javaStrTempl Macro
hi def link javaCharacter Character
hi def link javaSpecialChar SpecialChar
hi def link javaNumber Number