Added support for Power Query (#2250)

This adds support for Power Query.
https://docs.microsoft.com/en-us/powerquery-m/

components.json

@@ -760,6 +760,11 @@
 			"require": "sql",
 			"owner": "Golmote"
 		},
+		"powerquery": {
+			"title": "PowerQuery",
+			"alias": ["pq", "mscript"],
+			"owner": "peterbud"
+		},
 		"powershell": {
 			"title": "PowerShell",
 			"owner": "nauzilus"

components/prism-powerquery.js

@@ -0,0 +1,55 @@
+// https://docs.microsoft.com/en-us/powerquery-m/power-query-m-language-specification
+
+Prism.languages.powerquery = {
+    'comment': {
+        pattern: /(^|[^\\])(?:\/\*[\s\S]*?\*\/|(?:\/\/).*)/,
+        lookbehind: true
+    },
+    'quoted-identifier': {
+        pattern: /#"(?:[^"\r\n]|"")*"(?!")/,
+        greedy: true,
+        alias: 'variable'
+    },
+    'string': {
+        pattern: /"(?:[^"\r\n]|"")*"(?!")/,
+        greedy: true
+    },
+    'constant': [
+        /\bDay\.(?:Sunday|Monday|Tuesday|Wednesday|Thursday|Friday|Saturday)\b/,
+        /\bTraceLevel\.(?:Critical|Error|Information|Verbose|Warning)\b/,
+        /\bOccurrence\.(?:First|Last|All)\b/,
+        /\bOrder\.(?:Ascending|Descending)\b/,
+        /\bRoundingMode\.(?:AwayFromZero|Down|ToEven|TowardZero|Up)\b/,
+        /\bMissingField\.(?:Error|Ignore|UseNull)\b/,
+        /\bQuoteStyle\.(?:Csv|None)\b/,
+        /\bJoinKind\.(?:Inner|LeftOuter|RightOuter|FullOuter|LeftAnti|RightAnti)\b/,
+        /\bGroupKind\.(?:Global|Local)\b/,
+        /\bExtraValues\.(?:List|Ignore|Error)\b/,
+        /\bJoinAlgorithm\.(?:Dynamic|PairwiseHash|SortMerge|LeftHash|RightHash|LeftIndex|RightIndex)\b/,
+        /\bJoinSide\.(?:Left|Right)\b/,
+        /\bPrecision\.(?:Double|Decimal)\b/,
+        /\bRelativePosition\.From(?:End|Start)\b/,
+        /\bTextEncoding\.(?:Ascii|BigEndianUnicode|Unicode|Utf8|Utf16|Windows)\b/,
+        /\b(?:Any|Binary|Date|DateTime|DateTimeZone|Duration|Int8|Int16|Int32|Int64|Function|List|Logical|None|Number|Record|Table|Text|Time)\.Type\b/,
+        /\bnull\b/
+    ],
+    'boolean': /\b(?:true|false)\b/,
+    'keyword': /\b(?:and|as|each|else|error|if|in|is|let|meta|not|nullable|optional|or|otherwise|section|shared|then|try|type)\b|#(?:binary|date|datetime|datetimezone|duration|infinity|nan|sections|shared|table|time)\b/,
+    'function': {
+        pattern: /(^|[^#\w.])(?!\d)[\w.]+(?=\s*\()/,
+        lookbehind: true
+    },
+    'data-type': {
+        pattern: /\b(?:any|anynonnull|binary|date|datetime|datetimezone|duration|function|list|logical|none|number|record|table|text|time|type)\b/,
+        alias: 'variable'
+    },
+    'number': {
+        pattern: /\b0x[\da-f]+\b|(?:[+-]?(?:\b\d+\.)?\b\d+|[+-]\.\d+|(^|[^.])\B\.\d+)(?:e[+-]?\d+)?\b/i,
+        lookbehind: true
+    },
+    'operator': /[-+*\/&?@^]|<(?:=>?|>)?|>=?|=>?|\.\.\.?/,
+    'punctuation': /[,;\[\](){}]/
+};
+
+Prism.languages.pq = Prism.languages['powerquery'];
+Prism.languages.mscript = Prism.languages['powerquery']

examples/prism-powerquery.html

@@ -0,0 +1,74 @@
+<h2>Comments</h2>
+<pre><code>// This is a comment</code></pre>
+<h2>Simple example</h2>
+<pre><code>
+let
+    x = 1 + 1,
+    y = 2 + 2,
+    z = y + 1
+in
+    x + y + z
+</code></pre>
+<h2>Another example</h2>
+<pre><code>
+let Orders = Table.FromRecords({  
+    [OrderID = 1, CustomerID = 1, Item = "fishing rod", Price = 100.0],  
+    [OrderID = 2, CustomerID = 1, Item = "1 lb. worms", Price = 5.0],  
+    [OrderID = 3, CustomerID = 2, Item = "fishing net", Price = 25.0]}),  
+    #"Capitalized Each Word" = Table.TransformColumns(Orders, {"Item", Text.Proper})  
+in  
+    #"Capitalized Each Word"
+</code></pre>
+<h2>Full example</h2>
+<pre><code>
+    let
+    Source = Sales,
+    LookupTable = #table(
+    type table
+        [
+            #"FROM"=text,
+            #"TO"=text
+        ], 
+        {
+            {"CEE","Central & Eastern Europe"},
+            {"WE","Western Europe"}  
+        }
+    ),
+
+    JT = Table.NestedJoin(
+        Source, 
+        {"Area"}, 
+        LookupTable, 
+        {"FROM"}, 
+        "Map", 
+        JoinKind.LeftOuter
+    ),
+
+    #"Expanded Map" = Table.ExpandTableColumn(
+        JT, 
+        "Map", 
+        {"TO"}, 
+        {"TO"}
+    ),
+
+    #"Replace non-matches with original value" = Table.AddColumn(
+        #"Expanded Map", 
+        "Replaced", 
+        each 
+            if [TO] = null then [Area] 
+            else [TO]
+    ),
+
+    #"Remove original column" = Table.RemoveColumns(
+        #"Replace non-matches with original value",
+        {"Area", "TO"}
+    ),
+
+    #"Renamed replace column to original name" = Table.RenameColumns(
+        #"Remove original column",
+        {{"Replaced", "Area"}}
+    )
+
+in
+    #"Renamed replace column to original name"
+</code></pre>

plugins/autoloader/prism-autoloader.js

@@ -169,6 +169,8 @@
 		"n4jsd": "n4js",
 		"objectpascal": "pascal",
 		"px": "pcaxis",
+		"pq": "powerquery",
+		"mscript": "powerquery",
 		"py": "python",
 		"robot": "robotframework",
 		"rb": "ruby",

plugins/show-language/prism-show-language.js

@@ -121,6 +121,9 @@
 		"phpdoc": "PHPDoc",
 		"php-extras": "PHP Extras",
 		"plsql": "PL/SQL",
+		"powerquery": "PowerQuery",
+		"pq": "PowerQuery",
+		"mscript": "PowerQuery",
 		"powershell": "PowerShell",
 		"properties": ".properties",
 		"protobuf": "Protocol Buffers",