Add alignWithFirstAttr option to xml.format.splitAttributes

Signed-off-by: Jessica He <jhe@redhat.com>

docs/Formatting.md

@@ -155,7 +155,7 @@ No changes to quotes will occur during formatting if `xml.format.enforceQuoteSty
 
 ### xml.format.preserveAttributeLineBreaks
 
-Preserve line breaks that appear before and after attributes. This setting is overridden if [xml.format.splitAttributes](#xmlformatsplitattributes) is set to `true`. Default is `true`.
+Preserve line breaks that appear before and after attributes. This setting is overridden if [xml.format.splitAttributes](#xmlformatsplitattributes) is set to `splitNewLine` or `alignWithFirstAttr`. Default is `true`.
 
 If set to `true`, formatting does not change the following document:
 
@@ -241,21 +241,36 @@ If this value is set to 0, then all blank lines will be removed during formattin
 
 ### xml.format.splitAttributes
 
-  Set to `true` to split node attributes onto multiple lines during formatting. Defaults to `false`.
+  Set to `splitNewLine` to split node attributes onto multiple lines during formatting and set to `alignWithFirstAttr` to split node attributes after the first attribute to align with it.
+
+  Available values are `preserve`, `splitNewLine`, and `alignWithFirstAttr`. Defaults to `preserve`.
+
   Overrides the behaviour of [xml.format.preserveAttributeLineBreaks](#xmlformatpreserveattributelinebreaks).
-  Please see [xml.format.splitAttributesIndentSize](#xmlformatsplitAttributesIndentSize) for information on configuring the indentation level of the attributes.
 
+  Please see [xml.format.splitAttributesIndentSize](#xmlformatsplitAttributesIndentSize) for information on configuring the indentation level of the attributes in the case of `splitNewLine`.
+
+  The following xml:
   ```xml
   <project a="1" b="2" c="3"></project>
   ```
-  becomes...
+
+  Remains the same when set to `preserve`.
+
+  When set to `splitNewLine`, becomes:
   ```xml
   <project
       a="1"
       b="2"
       c="3"></project>
   ```
 
+  When set to `alignWithFirstAttr`, becomes:
+  ```xml
+  <project a="1"
+           b="2"
+           c="3"></project>
+  ```
+
 ***
 
 ### xml.format.joinCDATALines
@@ -453,7 +468,7 @@ If `xml.format.joinContentLines` is set to `true`, the above document becomes:
       weight='20' />
   </ROOT:root>
   ```
-  Note that it references two different external schemas. Additionally, the setting [`xml.format.splitAttributes`](#xmlformatsplitattributes) will be set to true for the formatted examples in order to make the formatted result easier to see.
+  Note that it references two different external schemas. Additionally, the setting [`xml.format.splitAttributes`](#xmlformatsplitattributes) will be set to `splitNewLine` for the formatted examples in order to make the formatted result easier to see.
 
   * When it is set to `none`, the formatter does not change the content of `xsi:schemaLocation`. The above file would not change after formatting.
 
@@ -491,7 +506,7 @@ If `xml.format.joinContentLines` is set to `true`, the above document becomes:
 
 ### xml.format.splitAttributesIndentSize
 
-  Use to configure how many levels to indent the attributes by when [xml.format.splitAttributes](#xmlformatsplitAttributes) is set to `true`.
+  Use to configure how many levels to indent the attributes by when [xml.format.splitAttributes](#xmlformatsplitAttributes) is set to `splitNewLine`.
 
   Here are some examples. For these examples, an indentation is two spaces.
 
@@ -559,7 +574,7 @@ If set to `true`, the closing bracket (`>` or `/>`) of a tag with at least 2 att
 
 The closing bracket will have the same indentation as the attributes (if any), following the indent level defined by [splitAttributesIndentSize](#xmlformatsplitattributesindentsize).
 
-Requires [splitAttributes](#xmlformatsplitattributes) to be set to `true`.
+Requires [splitAttributes](#xmlformatsplitattributes) to be set to `splitNewLine` or `alignWithFirstAttr`.
 
 Defaults to `false`.
 

package.json

@@ -341,7 +341,7 @@
         "xml.format.preserveAttributeLineBreaks": {
           "type": "boolean",
           "default": true,
-          "markdownDescription": "Preserve line breaks that appear before and after attributes. This setting is overridden if `#xml.format.splitAttributes#` is set to `true`. Default is `true`. See [here](command:xml.open.docs?%5B%7B%22page%22%3A%22Formatting%22%2C%22section%22%3A%22xmlformatpreserveattributelinebreaks%22%7D%5D) for more information.",
+          "markdownDescription": "Preserve line breaks that appear before and after attributes. This setting is overridden if `#xml.format.splitAttributes#` is set to `splitNewLine` or `alignWithFirstAttr`. Default is `true`. See [here](command:xml.open.docs?%5B%7B%22page%22%3A%22Formatting%22%2C%22section%22%3A%22xmlformatpreserveattributelinebreaks%22%7D%5D) for more information.",
           "scope": "window"
         },
         "xml.format.preserveEmptyContent": {
@@ -404,9 +404,14 @@
           "scope": "window"
         },
         "xml.format.splitAttributes": {
-          "type": "boolean",
-          "default": false,
-          "markdownDescription": "Split multiple attributes each onto a new line. Default is `false`. Indicate level of indentation with `#xml.format.splitAttributesIndentSize#`. See [here](command:xml.open.docs?%5B%7B%22page%22%3A%22Formatting%22%2C%22section%22%3A%22xmlformatsplitattributes%22%7D%5D) for more information.",
+          "type": "string",
+          "enum": [
+            "preserve",
+            "splitNewLine",
+            "alignWithFirstAttr"
+          ],
+          "default": "preserve",
+          "markdownDescription": "Split multiple attributes each onto a new line or align attributes to the first. Default is `preserve`. Indicate level of indentation with `#xml.format.splitAttributesIndentSize#`. See [here](command:xml.open.docs?%5B%7B%22page%22%3A%22Formatting%22%2C%22section%22%3A%22xmlformatsplitattributes%22%7D%5D) for more information.",
           "scope": "window"
         },
         "xml.format.splitAttributesIndentSize": {

src/settings/settings.ts

@@ -203,7 +203,7 @@ export function getXMLSettings(javaHome: string | undefined, logfile: string, ex
         },
         format: {
           enabled: true,
-          splitAttributes: false
+          splitAttributes: 'preserve'
         },
         completion: {
           autoCloseTags: false