[Chore] Add SwiftLint

.github/workflows/swiftlint.yml

@@ -0,0 +1,17 @@
+name: SwiftLint
+
+on:
+  pull_request:
+    paths:
+      - '.github/workflows/swiftlint.yml'
+      - '.swiftlint.yml'
+      - '**/*.swift'
+
+jobs:
+  SwiftLint:
+      runs-on: ubuntu-latest
+      steps:
+        - uses: actions/checkout@v1
+        - name: GitHub Action for SwiftLint
+          uses: norio-nomura/[email protected]
+

.swiftlint.yml

@@ -0,0 +1,10 @@
+included:
+  - Sources/Down
+  - Tests
+
+large_tuple:
+  warning: 3
+  error: 4
+
+cyclomatic_complexity:
+  ignores_case_statements: true

Down.xcodeproj/project.pbxproj

@@ -77,8 +77,8 @@
 		EE3E7E702604010700170A52 /* StylerTestSuite.swift in Sources */ = {isa = PBXBuildFile; fileRef = EE59C30122ECF0BD006EE8A8 /* StylerTestSuite.swift */; };
 		EE3E7E812604019300170A52 /* SnapshotTesting in Frameworks */ = {isa = PBXBuildFile; productRef = EE3E7E802604019300170A52 /* SnapshotTesting */; };
 		EE3E7E88260401F000170A52 /* VisitorTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = EE64FEEF225BEB3900A35B34 /* VisitorTests.swift */; };
-		EE408A39230338B600E5278A /* CGPoint_TranslateTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = EE408A38230338B600E5278A /* CGPoint_TranslateTests.swift */; };
-		EE408A3B2303399B00E5278A /* CGRect_HelpersTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = EE408A3A2303399B00E5278A /* CGRect_HelpersTests.swift */; };
+		EE408A39230338B600E5278A /* CGPointTranslateTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = EE408A38230338B600E5278A /* CGPointTranslateTests.swift */; };
+		EE408A3B2303399B00E5278A /* CGRectHelpersTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = EE408A3A2303399B00E5278A /* CGRectHelpersTests.swift */; };
 		EE408A3D23033B6B00E5278A /* ListItemPrefixGeneratorTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = EE408A3C23033B6B00E5278A /* ListItemPrefixGeneratorTests.swift */; };
 		EE44848B2301E51C0065C836 /* CodeBlockOptions.swift in Sources */ = {isa = PBXBuildFile; fileRef = EE44848A2301E51C0065C836 /* CodeBlockOptions.swift */; };
 		EE4484912301F2920065C836 /* CGPoint+Translate.swift in Sources */ = {isa = PBXBuildFile; fileRef = EE4484902301F2920065C836 /* CGPoint+Translate.swift */; };
@@ -267,8 +267,9 @@
 		D4F948DB1D00A4A800C9C0F6 /* NSAttributedStringTests.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = NSAttributedStringTests.swift; sourceTree = "<group>"; };
 		EE0E54F72300800E0070C83F /* BlockBackgroundColorAttribute.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BlockBackgroundColorAttribute.swift; sourceTree = "<group>"; };
 		EE335C4922EDC85900648842 /* ListItemStyleTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ListItemStyleTests.swift; sourceTree = "<group>"; };
-		EE408A38230338B600E5278A /* CGPoint_TranslateTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CGPoint_TranslateTests.swift; sourceTree = "<group>"; };
-		EE408A3A2303399B00E5278A /* CGRect_HelpersTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CGRect_HelpersTests.swift; sourceTree = "<group>"; };
+		EE39B28026063E0D002C4F8D /* .swiftlint.yml */ = {isa = PBXFileReference; lastKnownFileType = text.yaml; path = .swiftlint.yml; sourceTree = "<group>"; };
+		EE408A38230338B600E5278A /* CGPointTranslateTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CGPointTranslateTests.swift; sourceTree = "<group>"; };
+		EE408A3A2303399B00E5278A /* CGRectHelpersTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CGRectHelpersTests.swift; sourceTree = "<group>"; };
 		EE408A3C23033B6B00E5278A /* ListItemPrefixGeneratorTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ListItemPrefixGeneratorTests.swift; sourceTree = "<group>"; };
 		EE44848A2301E51C0065C836 /* CodeBlockOptions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CodeBlockOptions.swift; sourceTree = "<group>"; };
 		EE4484902301F2920065C836 /* CGPoint+Translate.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "CGPoint+Translate.swift"; sourceTree = "<group>"; };
@@ -297,8 +298,6 @@
 		EEA5C02822F58A0900B91D60 /* DownTextView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DownTextView.swift; sourceTree = "<group>"; };
 		EEA5C02A22F58B8000B91D60 /* ThematicBreakSyleTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ThematicBreakSyleTests.swift; sourceTree = "<group>"; };
 		EEA5C02C22F5C96B00B91D60 /* QuoteStripeAttribute.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = QuoteStripeAttribute.swift; sourceTree = "<group>"; };
-		EEBA153C2344845500B54ECB /* DownSnapshotTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DownSnapshotTests.swift; sourceTree = "<group>"; };
-		EEBA153E2344845500B54ECB /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
 		EEBE62EF25E28F3D005CCAD6 /* BundleHelper.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = BundleHelper.swift; sourceTree = "<group>"; };
 		EED8DA8D22BE404F00E54492 /* DownStyler.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DownStyler.swift; sourceTree = "<group>"; };
 		EED8DA8F22BECBAE00E54492 /* NSAttributedString+Helpers.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "NSAttributedString+Helpers.swift"; sourceTree = "<group>"; };
@@ -388,10 +387,10 @@
 		D4201E761CFA5151008EEC6E = {
 			isa = PBXGroup;
 			children = (
+				EE39B28026063E0D002C4F8D /* .swiftlint.yml */,
 				D4201E9B1CFA59A5008EEC6E /* Sources */,
 				D41689B41CFFE6BB00E5802B /* Supporting Files */,
 				D4201EC41CFA59A5008EEC6E /* Tests */,
-				EEBA153B2344845500B54ECB /* DownSnapshotTests */,
 				D4201E811CFA5151008EEC6E /* Products */,
 				EE54F96D22EB9CE400628683 /* Frameworks */,
 			);
@@ -513,8 +512,8 @@
 		EE408A3E23033DFE00E5278A /* Helpers */ = {
 			isa = PBXGroup;
 			children = (
-				EE408A3A2303399B00E5278A /* CGRect_HelpersTests.swift */,
-				EE408A38230338B600E5278A /* CGPoint_TranslateTests.swift */,
+				EE408A3A2303399B00E5278A /* CGRectHelpersTests.swift */,
+				EE408A38230338B600E5278A /* CGPointTranslateTests.swift */,
 				EE97254222C14B79004D3B3A /* NSAttributedString+HelpersTests.swift */,
 				EE97253D22C130D8004D3B3A /* NSMutableAttributedString+AttributesTests.swift */,
 			);
@@ -621,15 +620,6 @@
 			path = Styling;
 			sourceTree = "<group>";
 		};
-		EEBA153B2344845500B54ECB /* DownSnapshotTests */ = {
-			isa = PBXGroup;
-			children = (
-				EEBA153C2344845500B54ECB /* DownSnapshotTests.swift */,
-				EEBA153E2344845500B54ECB /* Info.plist */,
-			);
-			path = DownSnapshotTests;
-			sourceTree = "<group>";
-		};
 		EEC752BE22C4AE1300EC729C /* AST */ = {
 			isa = PBXGroup;
 			children = (
@@ -785,6 +775,7 @@
 				8A569F3D1E6B3E50008BE2AC /* Headers */,
 				14C5E33421877CDC00D5380C /* Resources */,
 				14CEAC38218774BC00039EDF /* Replace Bundle for macOS Platform */,
+				EED185ED26054F800051E616 /* Swiftlint */,
 			);
 			buildRules = (
 				8AE66BE41F848C3900ED4C98 /* PBXBuildRule */,
@@ -904,6 +895,24 @@
 			shellScript = "# Type a script or drag a script file from your workspace to insert its path.\nRESOURCE_PATH=$SRCROOT/Sources/Down/Resources\n\nFILENAME_IN_BUNDLE=DownView.bundle\n\nBUILD_APP_DIR=${BUILT_PRODUCTS_DIR}/${PRODUCT_NAME}.framework/Resources\n\necho \"$RESOURCE_PATH\"\necho \"$BUILD_APP_DIR\"\n\nif [ \"$PLATFORM_NAME\" == \"macosx\" ]; then\n    echo $BUILD_APP_DIR\n    rm -r \"$BUILD_APP_DIR/$FILENAME_IN_BUNDLE/\"\n    cp -R \"$RESOURCE_PATH/DownView (macOS).bundle\" \"$BUILD_APP_DIR/$FILENAME_IN_BUNDLE/\"\nfi\n";
 			showEnvVarsInLog = 0;
 		};
+		EED185ED26054F800051E616 /* Swiftlint */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputFileListPaths = (
+			);
+			inputPaths = (
+			);
+			name = Swiftlint;
+			outputFileListPaths = (
+			);
+			outputPaths = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "if which swiftlint >/dev/null; then\n  swiftlint\nelse\n  echo \"warning: SwiftLint not installed, download from https://github.com/realm/SwiftLint\"\nfi\n";
+		};
 /* End PBXShellScriptBuildPhase section */
 
 /* Begin PBXSourcesBuildPhase section */
@@ -1016,8 +1025,8 @@
 				EE8F38CC22BFB2420056270E /* NodeTests.swift in Sources */,
 				EE3E7E3F260400EE00170A52 /* LinkStyleTests.swift in Sources */,
 				EE3E7E38260400E800170A52 /* DownDebugLayoutManagerTests.swift in Sources */,
-				EE408A39230338B600E5278A /* CGPoint_TranslateTests.swift in Sources */,
-				EE408A3B2303399B00E5278A /* CGRect_HelpersTests.swift in Sources */,
+				EE408A39230338B600E5278A /* CGPointTranslateTests.swift in Sources */,
+				EE408A3B2303399B00E5278A /* CGRectHelpersTests.swift in Sources */,
 				EE3E7E88260401F000170A52 /* VisitorTests.swift in Sources */,
 				8AFAEB071E6E331700E09B68 /* DownViewTests.swift in Sources */,
 				8AFAEB061E6E331700E09B68 /* BindingTests.swift in Sources */,

Sources/Down/AST/Nodes/BaseNode.swift

@@ -10,7 +10,9 @@ import Foundation
 import libcmark
 
 public class BaseNode: Node {
-
+
+    // MARK: - Properties
+
     public let cmarkNode: CMarkNode
 
     public private(set) lazy var children: [Node] = Array(childSequence)
@@ -25,9 +27,11 @@ public class BaseNode: Node {
         }
         return depth
     }()
-
+
+    // MARK: - Life cycle
+
     init(cmarkNode: CMarkNode) {
         self.cmarkNode = cmarkNode
     }
-    
+
 }

Sources/Down/AST/Nodes/BlockQuote.swift

@@ -13,8 +13,9 @@ public class BlockQuote: BaseNode {}
 // MARK: - Debug
 
 extension BlockQuote: CustomDebugStringConvertible {
-    
+
     public var debugDescription: String {
         return "Block Quote"
     }
+
 }

Sources/Down/AST/Nodes/ChildSequence.swift

@@ -7,13 +7,34 @@
 
 import libcmark
 
-/// Sequence of child nodes
+/// Sequence of child nodes.
+
 public struct ChildSequence: Sequence {
+
+    // MARK: - Properties
+
     let node: CMarkNode
 
-    public struct Iterator: IteratorProtocol {
+    // MARK: - Methods
+
+    public func makeIterator() -> Iterator {
+        return Iterator(node: cmark_node_first_child(node))
+    }
+
+}
+
+// MARK: - Iterator
+
+public extension ChildSequence {
+
+    struct Iterator: IteratorProtocol {
+
+        // MARK: - Properties
+
         var node: CMarkNode?
 
+        // MARK: - Methods
+
         public mutating func next() -> Node? {
             guard let node = node else { return nil }
             defer { self.node = cmark_node_next(node) }
@@ -25,10 +46,7 @@ public struct ChildSequence: Sequence {
 
             return result
         }
-    }
 
-    public func makeIterator() -> Iterator {
-        return Iterator(node: cmark_node_first_child(node))
     }
-}
 
+}

Sources/Down/AST/Nodes/Code.swift

@@ -9,17 +9,21 @@ import Foundation
 import libcmark
 
 public class Code: BaseNode {
-
+
+    // MARK: - Properties
+
     /// The code content, if present.
+
     public private(set) lazy var literal: String? = cmarkNode.literal
-    
+
 }
 
 // MARK: - Debug
 
 extension Code: CustomDebugStringConvertible {
-    
+
     public var debugDescription: String {
         return "Code - \(literal ?? "nil")"
     }
+
 }

Sources/Down/AST/Nodes/CodeBlock.swift

@@ -9,10 +9,13 @@ import Foundation
 import libcmark
 
 public class CodeBlock: BaseNode {
-
+
+    // MARK: - Properties
+
     /// The code content, if present.
+
     public private(set) lazy var literal: String? = cmarkNode.literal
-    
+
     /// The fence info is an optional string that trails the opening sequence of backticks.
     /// It can be used to provide some contextual information about the block, such as
     /// the name of a programming language.
@@ -24,16 +27,18 @@ public class CodeBlock: BaseNode {
     /// '''
     /// ```
     ///
+
     public private(set) lazy var fenceInfo: String? = cmarkNode.fenceInfo
-    
+
 }
 
 // MARK: - Debug
 
 extension CodeBlock: CustomDebugStringConvertible {
-    
+
     public var debugDescription: String {
         let content = (literal ?? "nil").replacingOccurrences(of: "\n", with: "\\n")
         return "Code Block - fenceInfo: \(fenceInfo ?? "nil"), content: \(content)"
     }
+
 }

Sources/Down/AST/Nodes/CustomBlock.swift

@@ -9,17 +9,21 @@ import Foundation
 import libcmark
 
 public class CustomBlock: BaseNode {
-
+
+    // MARK: - Properfies
+
     /// The custom content, if present.
+
     public private(set) lazy var literal: String? = cmarkNode.literal
-    
+
 }
 
 // MARK: - Debug
 
 extension CustomBlock: CustomDebugStringConvertible {
-    
+
     public var debugDescription: String {
         return "Custom Block - \(literal ?? "nil")"
     }
+
 }

Sources/Down/AST/Nodes/CustomInline.swift

@@ -9,16 +9,20 @@ import Foundation
 import libcmark
 
 public class CustomInline: BaseNode {
-
+
+    // MARK: - Properties
+
     /// The custom content, if present.
+
     public private(set) lazy var literal: String? = cmarkNode.literal
 }
 
 // MARK: - Debug
 
 extension CustomInline: CustomDebugStringConvertible {
-    
+
     public var debugDescription: String {
         return "Custom Inline - \(literal ?? "nil")"
     }
+
 }

Sources/Down/AST/Nodes/Document.swift

@@ -9,26 +9,30 @@ import Foundation
 import libcmark
 
 public class Document: BaseNode {
-
+
+    // MARK: - Life cycle
+
     deinit {
-        // Frees the node and all its children.
         cmark_node_free(cmarkNode)
     }
-
+
+    // MARK: - Methods
+
     /// Accepts the given visitor and return its result.
+
     @discardableResult
     public func accept<T: Visitor>(_ visitor: T) -> T.Result {
         return visitor.visit(document: self)
     }
-
-}
 
+}
 
 // MARK: - Debug
 
 extension Document: CustomDebugStringConvertible {
-    
+
     public var debugDescription: String {
         return "Document"
     }
+
 }

Sources/Down/AST/Nodes/Emphasis.swift

@@ -13,8 +13,9 @@ public class Emphasis: BaseNode {}
 // MARK: - Debug
 
 extension Emphasis: CustomDebugStringConvertible {
-    
+
     public var debugDescription: String {
         return "Emphasis"
     }
+
 }