feat: add prop surrounds with range

.changeset/small-carrots-jam.md

@@ -0,0 +1,5 @@
+---
+'slate': patch
+---
+
+feat: add prop surrounds with range

docs/api/locations/range.md

@@ -54,6 +54,10 @@ Check if a `range` includes a path, a point, or part of another range.
 
 For clarity the definition of `includes` can mean partially includes. Another way to describe this is if one Range intersects the other Range.
 
+#### `Range.surrounds(range: Range, target: Range) => boolean`
+
+Check if a `range` includes another range.
+
 #### `Range.isBackward(range: Range) => boolean`
 
 Check if a `range` is backward, meaning that its anchor point appears _after_ its focus point in the document.

packages/slate/src/interfaces/range.ts

@@ -46,6 +46,11 @@ export interface RangeInterface {
    */
   includes: (range: Range, target: Path | Point | Range) => boolean
 
+  /**
+   * Check if a range includes another range.
+   */
+  surrounds: (range: Range, target: Range) => boolean
+
   /**
    * Get the intersection of a range with another.
    */
@@ -124,6 +129,14 @@ export const Range: RangeInterface = {
     )
   },
 
+  surrounds(range: Range, target: Range): boolean {
+    const intersectionRange = Range.intersection(range, target)
+    if (!intersectionRange) {
+      return false
+    }
+    return Range.equals(intersectionRange, target)
+  },
+
   includes(range: Range, target: Path | Point | Range): boolean {
     if (Range.isRange(target)) {
       if (