Merge MatrixKit develop with commit hash: b85b736313bec0592bd1cabc68035d97f5331137

Riot/Modules/MatrixKit/Utils/EventFormatter/MarkdownToHTMLRenderer.swift

@@ -0,0 +1,52 @@
+/*
+Copyright 2020 The Matrix.org Foundation C.I.C
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import Foundation
+import Down
+import libcmark
+
+@objc public protocol MarkdownToHTMLRendererProtocol: NSObjectProtocol {
+    func renderToHTML(markdown: String) -> String?
+}
+
+@objcMembers
+public class MarkdownToHTMLRenderer: NSObject {
+    
+    fileprivate var options: DownOptions = []
+    
+    //  Do not expose an initializer with options, because `DownOptions` is not ObjC compatible.
+    public override init() {
+        super.init()
+    }
+}
+
+extension MarkdownToHTMLRenderer: MarkdownToHTMLRendererProtocol {
+    
+    public func renderToHTML(markdown: String) -> String? {
+        return try? Down(markdownString: markdown).toHTML(options)
+    }
+    
+}
+
+@objcMembers
+public class MarkdownToHTMLRendererHardBreaks: MarkdownToHTMLRenderer {
+    
+    public override init() {
+        super.init()
+        options = .hardBreaks
+    }
+    
+}