Add MediaMessageLayoutDelegate

tapanprakasht · Sep 19, 2017 · 2eea060 · 2eea060
1 parent 1266a3e
commit 2eea060
Showing 1 changed file with 51 additions and 0 deletions.
diff --git a/Sources/MediaMessageLayoutDelegate.swift b/Sources/MediaMessageLayoutDelegate.swift
@@ -0,0 +1,51 @@
+/*
+ MIT License
+
+ Copyright (c) 2017 MessageKit
+
+ Permission is hereby granted, free of charge, to any person obtaining a copy
+ of this software and associated documentation files (the "Software"), to deal
+ in the Software without restriction, including without limitation the rights
+ to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ copies of the Software, and to permit persons to whom the Software is
+ furnished to do so, subject to the following conditions:
+
+ The above copyright notice and this permission notice shall be included in all
+ copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ SOFTWARE.
+ */
+
+import AVFoundation
+
+public protocol MediaMessageLayoutDelegate: MessagesLayoutDelegate {
+
+    func widthForMedia(message: MessageType, at indexPath: IndexPath, with maxWidth: CGFloat, in messagesCollectionView: MessagesCollectionView) -> CGFloat
+
+    func heightForMedia(message: MessageType, at indexPath: IndexPath, with maxWidth: CGFloat, in messagesCollectionView: MessagesCollectionView) -> CGFloat
+
+}
+
+public extension MediaMessageLayoutDelegate {
+
+    func widthForMedia(message: MessageType, at indexPath: IndexPath, with maxWidth: CGFloat, in messagesCollectionView: MessagesCollectionView) -> CGFloat {
+        return maxWidth
+    }
+
+    func heightForMedia(message: MessageType, at indexPath: IndexPath, with maxWidth: CGFloat, in messagesCollectionView: MessagesCollectionView) -> CGFloat {
+        switch message.data {
+        case .photo(let image), .video(_, let image):
+            let boundingRect = CGRect(origin: .zero, size: CGSize(width: maxWidth, height: .greatestFiniteMagnitude))
+            return AVMakeRect(aspectRatio: image.size, insideRect: boundingRect).height
+        default:
+            return 0
+        }
+    }
+
+}