Add support for $sheet.A1 style sheet references unique to Libre

Fixes #36

LibreOffice Calc Formula.sublime-syntax

@@ -16,6 +16,30 @@ contexts:
       2: meta.function-call.arguments.libre punctuation.section.arguments.begin.libre
     push: function-call-body
 
+  sheet-reference:
+    - match: (?=\$?{{sheet}}[!\.])
+      push: sheet-reference-body
+
+  sheet-reference-body:
+    - meta_scope: meta.reference.sheet
+    - match: '[!\.]'
+      scope: punctuation.separator.sequence.sheet
+      pop: 1
+    - match: \$
+      scope: punctuation.separator.sequence.libre
+    - match: \'
+      scope: punctuation.definition.annotation.begin.sheet
+      push:
+        - meta_content_scope: entity.name.struct.sheet
+        - match: \'\'
+          scope: constant.character.escape.sheet
+        - match: \'(?=[!\.])
+          scope: punctuation.definition.annotation.end.sheet
+          pop: 1
+    - match: '{{sheet}}'
+      scope: entity.name.struct.sheet
+    - include: immediately-pop
+
   cell-or-range-reference:
     - meta_append: true
     - match: ({{rc}})(:)({{rc}})
@@ -71,8 +95,23 @@ variables:
   # LibreOffice does not support tables
   table: (?!.)
 
-  # # TODO: Update with LibreOffice alternate-format sheet references in addition.
-  # sheet: (?#WIP)
+  # TODO: Is there a cleaner more compact (and probably more efficient) way to
+  #(dupe) do this? `'` are only legal in excel sheet names when padded on
+  #       either end with a legal character matched by [^:*/?\[\]\\],
+  #       and said `'` must come in pairs.
+  # TODO: Update with LibreOffice alternate-format sheet references in addition.
+  sheet_delimited: |-
+                    (?x:
+                      (?:'[^:*/?\[\]\\]+('')*[^:*/?\[\]\\]+')|
+                      (?:'[^:*/?\[\]\\]+')|
+                      (?:\$'[^:*/?\[\]\\]+('')*[^:*/?\[\]\\]+')
+                    )
+  sheet_normal: |-
+                    (?x:
+                      (?:[\w&&[^0-9]]\w*)|
+                      (?:\$[^\.:*/?\[\]\\]+)
+                    )
+  sheet: (?:{{sheet_delimited}}|{{sheet_normal}})
 
   # RC row/column offset format
   r_: |-

tests/syntax_test_libre_references.localc.txt

@@ -1,5 +1,7 @@
 ' SYNTAX TEST "Packages/Excel formula/LibreOffice Calc Formula.sublime-syntax"
 
+'''[ SEMI-SHARED REFERENCES ]''''''''''''''''''''''''''''''''''''''''''''''''''
+
 =C[2]
 
 =R[4]
@@ -26,3 +28,71 @@
 =RC[1]:R[1]C
 
 =RC[1]:RC[2]
+
+'''[ SHARED REFERENCES ]''''''''''''''''''''''''''''''''''''''''''''''''''
+
+='John''sSheetDon''tTouch'!A1
+
+='s''s'!N36
+'^^^^^^^ meta.reference.sheet
+'^ punctuation.definition.annotation.begin.sheet - entity
+' ^^^^ entity.name.struct.sheet
+'  ^^ constant.character.escape.sheet
+'     ^ punctuation.definition.annotation.end.sheet - entity
+'      ^ punctuation.separator.sequence.sheet
+'       ^^^ meta.reference.cell.sheet storage.type.sheet
+
+='s''''s'!N36
+'^^^^^^^^^ meta.reference.sheet
+'^ punctuation.definition.annotation.begin.sheet - entity
+' ^^^^^^ entity.name.struct.sheet
+'  ^^^^ constant.character.escape.sheet
+'       ^ punctuation.definition.annotation.end.sheet - entity
+'        ^ punctuation.separator.sequence.sheet
+'         ^^^ meta.reference.cell.sheet storage.type.sheet
+
+=한국어!L11
+' <- keyword.operator.assignment
+'^^^^^^^ meta.reference - meta meta
+'       ^ - meta.reference
+'^^^ entity.name.struct
+'   ^ punctuation.separator.sequence
+'    ^^^ storage.type
+
+=_hello_2world!N36
+' <- keyword.operator.assignment
+'^^^^^^^^^^^^^^^^^ meta.reference - meta meta
+'                 ^ - meta.reference
+'^^^^^^^^^^^^^ entity.name.struct
+'             ^ punctuation.separator.sequence - entity
+
+='This''sASheetWithAnEscapedSingleQuote'!A1
+'^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ meta.reference.sheet - meta meta
+'^ punctuation.definition.annotation.begin.sheet - entity
+' ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ entity.name.struct.sheet
+'     ^^ constant.character.escape.sheet
+'                                      ^ punctuation.definition.annotation.end.sheet - entity
+'                                       ^ punctuation.separator.sequence.sheet
+'                                        ^^ meta.reference.cell.sheet storage.type.sheet
+' <- keyword.operator.assignment.sheet
+
+=''''!A1
+'^^^^^ meta.reference.sheet
+'^ punctuation.definition.annotation.begin.sheet
+' ^^ entity.name.struct.sheet constant.character.escape.sheet - punctuation
+'   ^ punctuation.definition.annotation.end.sheet
+'    ^ punctuation.separator.sequence.sheet
+'     ^^ meta.reference.cell.sheet storage.type.sheet
+' <- keyword.operator.assignment.sheet
+
+='^'!A1
+'^^^^ meta.reference.sheet
+'^ punctuation.definition.annotation.begin.sheet
+' ^ entity.name.struct.sheet
+'  ^ punctuation.definition.annotation.end.sheet
+'   ^ punctuation.separator.sequence.sheet
+'    ^^ meta.reference.cell.sheet storage.type.sheet
+
+'''[ LIBRE REFERENCES ]''''''''''''''''''''''''''''''''''''''''''''''''''
+
+=$'John''sSheetDon''tTouch'.A1