Add Svelte support

CHANGELOG.rst

@@ -17,6 +17,7 @@ Added
 
 - Public API function `is_enabled`
 - Rasi support
+- Svelte support
 - XML support
 - Missing patterns for Java:
    - `array_initializer`

queries/svelte/rainbow-delimiters.scm

@@ -0,0 +1,35 @@
+(script_element
+  (start_tag
+    "<" @delimiter
+    (tag_name) @delimiter
+    ">" @delimiter)
+  (end_tag
+    "</" @delimiter
+    (tag_name) @delimiter
+    ">" @delimiter @sentinel)) @container
+
+(style_element
+  (start_tag
+    "<" @delimiter
+    (tag_name) @delimiter
+    ">" @delimiter)
+  (end_tag
+    "</" @delimiter
+    (tag_name) @delimiter
+    ">" @delimiter @sentinel)) @container
+
+(element
+  (self_closing_tag
+    "<" @delimiter
+    (tag_name) @delimiter
+    "/>" @delimiter @sentinel)) @container
+
+(element
+  (start_tag
+    "<" @delimiter
+    (tag_name) @delimiter
+    ">" @delimiter)
+  (end_tag
+    "</" @delimiter
+    (tag_name) @delimiter
+    ">" @delimiter @sentinel)) @container

queries/svelte/rainbow-delimiters.txt

@@ -0,0 +1,53 @@
+(script_element
+  (start_tag
+    "<" @delimiter
+    (tag_name) @delimiter
+    ">" @delimiter)
+  (end_tag
+    "</" @delimiter
+    (tag_name) @delimiter
+    ">" @delimiter @sentinel)) @container
+
+(style_element
+  (start_tag
+    "<" @delimiter
+    (tag_name) @delimiter
+    ">" @delimiter)
+  (end_tag
+    "</" @delimiter
+    (tag_name) @delimiter
+    ">" @delimiter @sentinel)) @container
+
+(element
+  (self_closing_tag
+    "<" @delimiter
+    (tag_name) @delimiter
+    "/>" @delimiter @sentinel)) @container
+
+(element
+  (start_tag
+    "<" @delimiter
+    (tag_name) @delimiter
+    ">" @delimiter)
+  (end_tag
+    "</" @delimiter
+    (tag_name) @delimiter
+    ">" @delimiter @sentinel)) @container
+
+(const_expr
+  "{" @delimiter
+  "@" @delimiter
+  (special_block_keyword) @delimiter
+  "}" @delimiter @sentinel) @container
+
+(each_statement
+  (each_start_expr
+    "{" @delimiter
+    "#" @delimiter
+    (special_block_keyword) @delimiter
+    "}" @delimiter) @container
+  (each_end_expr
+    "{" @delimiter
+    "/" @delimiter
+    (special_block_keyword) @delimiter
+    "}" @delimiter @sentinel)) @container

test/highlight/svelte/regular.svelte

@@ -0,0 +1,31 @@
+<script lang="ts">
+	import { baz } from 'foo/bar';
+
+	baz({a: {b: {c: 'd'}}});
+</script>
+
+<style>
+	p {
+		font-size: 2em;
+	}
+</style>
+
+<svelte:head>
+	<title>Test page</title>
+	<meta name="description" content="A test page" />
+</svelte:head>
+
+<h1>A test page for Svelte</h1>
+
+<form action="?/herp/derp" method="post">
+	<p>This is a paragraph</p>
+	<hr/>
+	<ul>
+		{#each ["foo", "bar", "baz"] as x}
+		<li class="some-class">{ x }</li>
+		{/each}
+	</ul>
+	{# if True}
+	<p>Some text </p>
+	{/if}
+</form>