From 52f2ece16fa3c7ca2a100620af9aa778cebcc961 Mon Sep 17 00:00:00 2001
From: Andrew Haust <andrew@hau.st>
Date: Tue, 9 Dec 2025 00:17:52 -0500
Subject: [PATCH 1/3] Add Hologram support

* ~HOLO sigil
* Event bindings ($click, $blur, etc)
  * Interpolation delimiters
---
 syntax/elixir.vim | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/syntax/elixir.vim b/syntax/elixir.vim
index 01660e7..b6629a4 100644
--- a/syntax/elixir.vim
+++ b/syntax/elixir.vim
@@ -120,7 +120,7 @@ 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
@@ -138,12 +138,20 @@ 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
 

From c9d7fcbb83b042ab656d4ac14862efb524faf6a8 Mon Sep 17 00:00:00 2001
From: Andrew Haust <andrew@hau.st>
Date: Sat, 21 Mar 2026 12:46:08 -0400
Subject: [PATCH 2/3] Fix HEEx expression highlighting

---
 syntax/elixir.vim | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/syntax/elixir.vim b/syntax/elixir.vim
index b6629a4..a03fb6b 100644
--- a/syntax/elixir.vim
+++ b/syntax/elixir.vim
@@ -127,10 +127,8 @@ syn region eelixirExpression matchgroup=eelixirDelimiter start="<%"  end="%\@<!%
 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

From b4aec42aad8bc94f29513de1fc0bf73485f50495 Mon Sep 17 00:00:00 2001
From: Andrew Haust <andrew@hau.st>
Date: Sat, 21 Mar 2026 12:50:05 -0400
Subject: [PATCH 3/3] Highlight string interpolation in sigils with ', ", and |

---
 syntax/elixir.vim | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/syntax/elixir.vim b/syntax/elixir.vim
index a03fb6b..ebd64b0 100644
--- a/syntax/elixir.vim
+++ b/syntax/elixir.vim
@@ -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