Merge pull request #17 from quipper/elliekwon/message-layout-manager

Override showCGGlyphs for foregroundColor
quipper · Jun 22, 2021 · f0cc897 · f0cc897
2 parents 115bbf4 + 762f84e
commit f0cc897
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Showing 3 changed files with 33 additions and 2 deletions.
diff --git a/MessageKit.xcodeproj/project.pbxproj b/MessageKit.xcodeproj/project.pbxproj
@@ -95,6 +95,7 @@
 		B7A03F731F866A06006AEF79 /* MessageKit+Availability.swift in Sources */ = {isa = PBXBuildFile; fileRef = B7A03F701F866A06006AEF79 /* MessageKit+Availability.swift */; };
 		B7A03F751F866A06006AEF79 /* MessageKit.h in Headers */ = {isa = PBXBuildFile; fileRef = B7A03F721F866A06006AEF79 /* MessageKit.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		B7A03F7B1F866B85006AEF79 /* MessageCollectionViewCell.swift in Sources */ = {isa = PBXBuildFile; fileRef = B7A03F7A1F866B85006AEF79 /* MessageCollectionViewCell.swift */; };
+		E1123DFB26818D1D00DE7AD8 /* MessageLayoutManager.swift in Sources */ = {isa = PBXBuildFile; fileRef = E1123DFA26818D1D00DE7AD8 /* MessageLayoutManager.swift */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -214,6 +215,7 @@
 		B7A03F711F866A06006AEF79 /* Info.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
 		B7A03F721F866A06006AEF79 /* MessageKit.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = MessageKit.h; sourceTree = "<group>"; };
 		B7A03F7A1F866B85006AEF79 /* MessageCollectionViewCell.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = MessageCollectionViewCell.swift; sourceTree = "<group>"; };
+		E1123DFA26818D1D00DE7AD8 /* MessageLayoutManager.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MessageLayoutManager.swift; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -450,6 +452,7 @@
 				1FE783A7206633C0007FA024 /* InsetLabel.swift */,
 				B7A03F431F86694F006AEF79 /* MessageContainerView.swift */,
 				B7A03F3F1F86694F006AEF79 /* MessageLabel.swift */,
+				E1123DFA26818D1D00DE7AD8 /* MessageLayoutManager.swift */,
 				B7A03F451F86694F006AEF79 /* MessagesCollectionView.swift */,
 				B7A03F441F86694F006AEF79 /* PlayButtonView.swift */,
 				38F8063421740DAD00CDB9DB /* TypingBubble.swift */,
@@ -670,6 +673,7 @@
 				B7A03F6D1F8669EB006AEF79 /* Bundle+Extensions.swift in Sources */,
 				1FD589602064E08A004B5081 /* MediaItem.swift in Sources */,
 				B7A03F611F8669CA006AEF79 /* MessagesDataSource.swift in Sources */,
+				E1123DFB26818D1D00DE7AD8 /* MessageLayoutManager.swift in Sources */,
 				5955CE4C23140AA1000987D0 /* AudioMessageCell.swift in Sources */,
 				B7A03F6E1F8669EB006AEF79 /* NSAttributedString+Extensions.swift in Sources */,
 				B7A03F471F86694F006AEF79 /* MessageLabel.swift in Sources */,

diff --git a/Sources/Views/MessageLabel.swift b/Sources/Views/MessageLabel.swift
@@ -28,8 +28,8 @@ open class MessageLabel: UILabel {
 
     // MARK: - Private Properties
 
-    private lazy var layoutManager: NSLayoutManager = {
-        let layoutManager = NSLayoutManager()
+    private lazy var layoutManager: MessageLayoutManager = {
+        let layoutManager = MessageLayoutManager()
         layoutManager.addTextContainer(self.textContainer)
         return layoutManager
     }()

diff --git a/Sources/Views/MessageLayoutManager.swift b/Sources/Views/MessageLayoutManager.swift
@@ -0,0 +1,27 @@
+//
+//  MessageLayoutManager.swift
+//  MessageKit
+//
+//  Created by Bokyung Kwon on 2021/06/22.
+//  Copyright © 2021 MessageKit. All rights reserved.
+//
+
+import UIKit
+
+open class MessageLayoutManager: NSLayoutManager {
+    @available(iOS 13.0, *)
+    override func showCGGlyphs(_ glyphs: UnsafePointer<CGGlyph>,
+                               positions: UnsafePointer<CGPoint>,
+                                   count glyphCount: Int,
+                                    font: UIFont,
+                              textMatrix: CGAffineTransform,
+                              attributes: [NSAttributedString.Key : Any] = [:],
+                              in CGContext: CGContext) {
+
+        if let foregroundColor = attributes[NSAttributedString.Key.foregroundColor] as? UIColor {
+            CGContext.setFillColor(foregroundColor.cgColor)
+        }
+
+        super.showCGGlyphs(glyphs, positions: positions, count: glyphCount, font: font, textMatrix: textMatrix, attributes: attributes, in: CGContext)
+    }
+}