fix(jinja): assign highlights to all variables and functions

The majority of jinja variables aren't assigned any highlights at all.
Assign @variable to all identifiers.

Jinja filters without parameters are not highlighted as functions: add a
query for these.

Refine the existing @variable.member to only capture identifiers instead
of broader nodes.

runtime/queries/jinja_inline/highlights.scm

@@ -71,11 +71,7 @@
   "as"
 ] @keyword.import
 
-(import_statement
-  (identifier) @variable)
-
-(import_as
-  (identifier) @variable)
+(identifier) @variable
 
 [
   "if"
@@ -109,12 +105,34 @@
 
 (expression
   "."
-  (expression)+ @variable.member)
+  (expression
+    (binary_expression
+      .
+      (unary_expression
+        (primary_expression
+          (identifier) @variable.member)))))
+
+(expression
+  "."
+  (expression
+    (binary_expression
+      (binary_expression
+        (unary_expression
+          (primary_expression
+            (identifier) @variable.member))))))
 
 (assignment_expression
   "."
   (identifier)+ @variable.member)
 
+; jinja filters
+(binary_expression
+  (binary_operator
+    "|")
+  (unary_expression
+    (primary_expression
+      (identifier) @function.call)))
+
 (inline_trans
   "_" @function.builtin)
 

tests/query/highlights/jinja/filters.jinja

@@ -0,0 +1,19 @@
+{{ name|striptags|title }}
+{# ^^^^ @variable #}
+{#      ^^^^^ @function.call #}
+{#                ^^^^^ @function.call #}
+
+{{ listx|join(', ') }}
+{# ^^^^^ @variable #}
+{#       ^^^^ @function.call #}
+{#            ^^^^ @string #}
+
+{{ listx|join(str) }}
+{# ^^^^^ @variable #}
+{#       ^^^^ @function.call #}
+{#            ^^^ @variable.parameter #}
+
+{{ foo.bar|random }}
+{# ^^^ @variable #}
+{#     ^^^ @variable.member #}
+{#         ^^^^^^ @function.call #}

tests/query/highlights/jinja/tests.jinja

@@ -0,0 +1,13 @@
+{% if loop.index is divisibleby 3 %}
+{#    ^^^^ @variable #}
+{#         ^^^^^ @variable.member #}
+{#                  ^^^^^^^^^^ @keyword.operator #}
+
+{% if loop.index is divisibleby(3) %}
+{#    ^^^^ @variable #}
+{#         ^^^^^ @variable.member #}
+
+{% if foo.bar.baz is divisibleby 3 %}
+{#    ^^^ @variable #}
+{#        ^^^ @variable.member #}
+{#            ^^^ @variable.member #}

tests/query/highlights/jinja/variables.jinja

@@ -0,0 +1,21 @@
+{{ foo }}
+{# ^^^ @variable #}
+
+{{ foo.bar }}
+{# ^^^ @variable #}
+{#     ^^^ @variable.member #}
+
+{{ foo['bar'] }}
+{# ^^^ @variable #}
+{#     ^^^^^ @string #}
+
+{{ foo.bar.baz }}
+{# ^^^ @variable #}
+{#     ^^^ @variable.member #}
+{#         ^^^ @variable.member #}
+
+{{ foo.bar + baz.qux }}
+{# ^^^ @variable #}
+{#     ^^^ @variable.member #}
+{#           ^^^ @variable #}
+{#               ^^^ @variable.member #}