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Add Hologram support + HEEx fixes #585

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Add Hologram support + HEEx fixes #585

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52f2ece
Add Hologram support
sodapopcan Dec 9, 2025
c9d7fcb
Fix HEEx expression highlighting
sodapopcan Mar 21, 2026
b4aec42
Highlight string interpolation in sigils with ', ", and |
sodapopcan Mar 21, 2026
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16 changes: 11 additions & 5 deletions syntax/elixir.vim
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Original file line number Diff line number Diff line change
Expand Up @@ -98,7 +98,7 @@ syn region elixirSigil matchgroup=elixirSigilDelimiter start="\~\u\+<"
syn region elixirSigil matchgroup=elixirSigilDelimiter start="\~\u\+\[" end="\]" skip="\\\\\|\\\]" contains=elixirDelimEscape fold
syn region elixirSigil matchgroup=elixirSigilDelimiter start="\~\u\+(" end=")" skip="\\\\\|\\)" contains=elixirDelimEscape fold

syn region elixirSigil matchgroup=elixirSigilDelimiter start="\~\l\z(/\|\"\|'\||\)" end="\z1" skip="\\\\\|\\\z1" fold
syn region elixirSigil matchgroup=elixirSigilDelimiter start="\~\l\z(/\|\"\|'\||\)" end="\z1" skip="\\\\\|\\\z1" contains=@elixirStringContained,elixirRegexEscapePunctuation fold
syn region elixirSigil matchgroup=elixirSigilDelimiter start="\~\l{" end="}" skip="\\\\\|\\}" contains=@elixirStringContained,elixirRegexEscapePunctuation fold
syn region elixirSigil matchgroup=elixirSigilDelimiter start="\~\l<" end=">" skip="\\\\\|\\>" contains=@elixirStringContained,elixirRegexEscapePunctuation fold
syn region elixirSigil matchgroup=elixirSigilDelimiter start="\~\l\[" end="\]" skip="\\\\\|\\\]" contains=@elixirStringContained,elixirRegexEscapePunctuation fold
Expand All @@ -120,30 +120,36 @@ syntax region elixirLiveViewSigil matchgroup=elixirSigilDelimiter keepend start=
syntax region elixirPhoenixESigil matchgroup=elixirSigilDelimiter keepend start=+\~E\z("""\)+ end=+^\s*\z1+ skip=+\\"+ contains=@HTML fold
syntax region elixirPhoenixeSigil matchgroup=elixirSigilDelimiter keepend start=+\~e\z("""\)+ end=+^\s*\z1+ skip=+\\"+ contains=@HTML fold

syn cluster elixirTemplateSigils contains=elixirLiveViewSigil,elixirHeexSigil,elixirSurfaceSigil,elixirPhoenixESigil,elixirPhoenixeSigil
syn cluster elixirTemplateSigils contains=elixirLiveViewSigil,elixirHeexSigil,elixirSurfaceSigil,elixirPhoenixESigil,elixirPhoenixeSigil,elixirHologramSigil

syn region heexComponent matchgroup=eelixirDelimiter start="<\.[a-z_]\+" end="%\@<!>" contains=ALLBUT,@elixirNotTop keepend
syn region eelixirExpression matchgroup=eelixirDelimiter start="<%" end="%\@<!%>" contains=ALLBUT,@elixirNotTop containedin=@elixirTemplateSigils keepend
syn region eelixirExpression matchgroup=eelixirDelimiter start="<%=" end="%\@<!%>" contains=ALLBUT,@elixirNotTop containedin=@elixirTemplateSigils keepend
syn region eelixirQuote matchgroup=eelixirDelimiter start="<%%" end="%\@<!%>" contains=ALLBUT,@elixirNotTop containedin=@elixirTemplateSigils keepend
syn region heexComment matchgroup=eelixirDelimiter start="<%!--" end="%\@<!--%>" contains=elixirTodo,eelixirComment,@Spell containedin=@elixirTemplateSigils keepend
syn region heexExpression matchgroup=heexDelimiter start="=\zs{" end="}" contains=ALLBUT,@elixirNotTop containedin=htmlValue keepend
syn region heexExpression matchgroup=heexDelimiter start="=\zs{" end="}" skip="#{[^}]*}" contains=ALLBUT,@elixirNotTop containedin=htmlValue keepend
syn region heexExpression matchgroup=heexDelimiter start="{" end="}" skip="#{[^}]*}" contains=ALLBUT,elixirComment,@elixirNotTop containedin=elixirHeexSigil,htmlValue
" missing `keepend` on next line is intentional
syn region heexExpression matchgroup=heexDelimiter start="=\zs{" end="}" skip="%{[^}]*}" contains=ALLBUT,@elixirNotTop containedin=htmlValue

syn match phxArg "\<phx[-.0-9_a-z]*-[-.0-9_a-z]*\>" containedin=htmlTag
syn match heexArg "\<[0-9_a-z]*\>\ze=" containedin=htmlTag
syn match heexSpecialAttribute ":\%(if\|for\|let\)\ze=" containedin=htmlTag
syn match heexComponentName "<\zs\.[A-Z_a-z][A-Z_a-z0-9]\+" containedin=htmlTag
syn match heexEndComponent "<\zs\/\.[A-Z_a-z][A-Z_a-z0-9]\+" containedin=htmlEndTag

" Hologram
syn region elixirHologramSigil matchgroup=elixirSigilDelimiter keepend start=+\~HOLO\=\z("""\)+ end=+^\s*\z1+ skip=+\\"+ contains=@HTML fold
syn region elixirHologramBlockOpen matchgroup=heexDelimiter start="\zs{%\(for\|if\|raw\)" end="}" skip="%{[^}]*}" contains=ALLBUT,@elixirNotTop containedin=@elixirTemplateSigils keepend
syn region elixirHologramBlockClose matchgroup=heexDelimiter start="\zs{/\(for\|if\|raw\)" end="}" skip="%{[^}]*}" containedin=@elixirTemplateSigils keepend
syn region elixirHolgramInterpolation matchgroup=heexDelimiter start="\zs{[%/]\@!" end="}" skip="%{[^}]*}" contains=ALLBUT,elixirComment,@elixirNotTop containedin=elixirHologramSigil,htmlString
syn match elixirHologramEventBinding "$\%(blur\|change\|click\|focus\|mouse_move\|pointer_cancel\|pointer_down\|pointer_move\|pointer_up\|select\|submit\|transition_\(cancel\|end\|run\|start\)transition_start\)\ze=" containedin=htmlTag

hi def link eelixirDelimiter PreProc
hi def link heexDelimiter PreProc
hi def link heexComment Comment
hi def link phxArg htmlArg
hi def link heexArg htmlArg
hi def link heexSpecialAttribute htmlArg
hi def link elixirHologramEventBinding Keyword
hi def link heexComponentName htmlTagName
hi def link heexEndComponent htmlTagName

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