Add quater mode to Filled Mode

Cosmos/CosmosAccessibility.swift

@@ -68,7 +68,7 @@ struct CosmosAccessibility {
       increment = ceil(rating) - rating
       if increment == 0 { increment = 1 }
 
-    case .half, .precise:
+    case .half, .precise, .quarter:
       increment = (ceil(rating * 2) - rating * 2) / 2
       if increment == 0 { increment = 0.5 }      
     }
@@ -87,7 +87,7 @@ struct CosmosAccessibility {
       increment = rating - floor(rating)
       if increment == 0 { increment = 1 }
 
-    case .half, .precise:
+    case .half, .precise, .quarter:
       increment = (rating * 2 - floor(rating * 2)) / 2
       if increment == 0 { increment = 0.5 }
     }

Cosmos/CosmosRating.swift

@@ -47,6 +47,8 @@ struct CosmosRating {
       return Double(round(starFillLevel * 2) / 2)
     case .precise :
       return starFillLevel
+    case .quarter:
+      return Double(round(starFillLevel * 4) / 4)
     }
   }
 

Cosmos/StarFillMode.swift

@@ -14,4 +14,7 @@ public enum StarFillMode: Int {
 
   /// Fill star according to decimal rating. For example, fourth star will be 20% filled for 3.2.
   case precise = 2
+
+  /// Show fully filled and half-filled , quarter-filled stars. For example, fourth star will be quarter filled for 3.75.
+  case quarter = 3
 }

CosmosTests/CosmosRatingTests.swift

@@ -9,6 +9,9 @@ class CosmosDisplayedRatingTests: XCTestCase {
     var result = CosmosRating.displayedRatingFromPreciseRating(4.6, fillMode: .half, totalStars: 5)
     XCTAssertEqual(4.5, result)
 
+    result = CosmosRating.displayedRatingFromPreciseRating(4.6, fillMode: .quarter, totalStars: 5)
+    XCTAssertEqual(4.5, result)
+
     result = CosmosRating.displayedRatingFromPreciseRating(4.6, fillMode: .full, totalStars: 5)
     XCTAssertEqual(5, result)
 
@@ -22,10 +25,16 @@ class CosmosDisplayedRatingTests: XCTestCase {
     var result = CosmosRating.displayedRatingFromPreciseRating(7, fillMode: .half, totalStars: 5)
     XCTAssertEqual(5, result)
 
+    result = CosmosRating.displayedRatingFromPreciseRating(7, fillMode: .quarter, totalStars: 5)
+    XCTAssertEqual(5, result)
+
 
     // Rating is less than zero
     result = CosmosRating.displayedRatingFromPreciseRating(-1, fillMode: .half, totalStars: 5)
     XCTAssertEqual(0, result)
+
+    result = CosmosRating.displayedRatingFromPreciseRating(-1, fillMode: .quarter, totalStars: 5)
+    XCTAssertEqual(0, result)
   }
 
   // MARK: - Star fill level
@@ -53,6 +62,12 @@ class CosmosDisplayedRatingTests: XCTestCase {
 
     XCTAssertEqual(0.5, result)
   }
+
+  func testStarFillLevel_partiallyFileldQuarter() {
+    let result = CosmosRating.starFillLevel(ratingRemainder: 0.67, fillMode: .quarter)
+
+    XCTAssertEqual(0.75, result)
+  }
 
   func testStarFillLevel_partiallyFileldFull() {
     let result = CosmosRating.starFillLevel(ratingRemainder: 0.67, fillMode: .full)
@@ -80,6 +95,18 @@ class CosmosDisplayedRatingTests: XCTestCase {
     XCTAssertEqual(1,   CosmosRating.roundFillLevel(0.9,  fillMode: .half))
     XCTAssertEqual(1,   CosmosRating.roundFillLevel(1,    fillMode: .half))
   }
+
+  func testRoundFillLevel_quarter() {
+    XCTAssertEqual(0,    CosmosRating.roundFillLevel(0,    fillMode: .quarter))
+    XCTAssertEqual(0.0,  CosmosRating.roundFillLevel(0.1,  fillMode: .quarter))
+    XCTAssertEqual(0.25, CosmosRating.roundFillLevel(0.25, fillMode: .quarter))
+    XCTAssertEqual(0.25, CosmosRating.roundFillLevel(0.3,  fillMode: .quarter))
+    XCTAssertEqual(0.5,  CosmosRating.roundFillLevel(0.5,  fillMode: .quarter))
+    XCTAssertEqual(0.5,  CosmosRating.roundFillLevel(0.6,  fillMode: .quarter))
+    XCTAssertEqual(0.75, CosmosRating.roundFillLevel(0.75, fillMode: .quarter))
+    XCTAssertEqual(1,    CosmosRating.roundFillLevel(0.9,  fillMode: .quarter))
+    XCTAssertEqual(1,    CosmosRating.roundFillLevel(1,    fillMode: .quarter))
+  }
 
   func testRoundFillLevel_precise() {
     XCTAssertEqual(0,   CosmosRating.roundFillLevel(0,    fillMode: .precise))

Distrib/CosmosDistrib.swift

@@ -29,6 +29,9 @@ public enum StarFillMode: Int {
 
   /// Fill star according to decimal rating. For example, fourth star will be 20% filled for 3.2.
   case precise = 2
+
+  /// Show fully filled and half-filled , quarter-filled stars. For example, fourth star will be quarter filled for 3.75.
+  case quarter = 3
 }
 
 
@@ -275,7 +278,7 @@ struct CosmosAccessibility {
       increment = ceil(rating) - rating
       if increment == 0 { increment = 1 }
 
-    case .half, .precise:
+    case .half, .precise, .quarter:
       increment = (ceil(rating * 2) - rating * 2) / 2
       if increment == 0 { increment = 0.5 }      
     }
@@ -294,7 +297,7 @@ struct CosmosAccessibility {
       increment = rating - floor(rating)
       if increment == 0 { increment = 1 }
 
-    case .half, .precise:
+    case .half, .precise, .quarter:
       increment = (rating * 2 - floor(rating * 2)) / 2
       if increment == 0 { increment = 0.5 }
     }
@@ -938,6 +941,8 @@ struct CosmosRating {
       return Double(round(starFillLevel * 2) / 2)
     case .precise :
       return starFillLevel
+    case .quarter:
+      return Double(round(starFillLevel * 4) / 4)
     }
   }
 

README.md

@@ -124,7 +124,7 @@ cosmosView.settings.updateOnTouch = false
 
 // Show only fully filled stars
 cosmosView.settings.fillMode = .full
-// Other fill modes: .half, .precise
+// Other fill modes: .half, .precise, .quarter
 
 // Change the size of the stars
 cosmosView.settings.starSize = 30