Improve code blocks

submodules/Display/Source/TextNode.swift

@@ -10,6 +10,10 @@ private let quoteIcon: UIImage = {
     return UIImage(bundleImageName: "Chat/Message/ReplyQuoteIcon")!.precomposed()
 }()
 
+private let codeIcon: UIImage = {
+    return UIImage(bundleImageName: "Chat/Message/TextCodeIcon")!.precomposed()
+}()
+
 private final class TextNodeStrikethrough {
     let range: NSRange
     let frame: CGRect
@@ -1363,7 +1367,9 @@ open class TextNode: ASDisplayNode {
                 case .quote:
                     additionalSegmentRightInset = blockQuoteIconInset
                 case .code:
-                    break
+                    if segment.title != nil {
+                        additionalSegmentRightInset = blockQuoteIconInset
+                    }
                 }
             }
             
@@ -2245,7 +2251,17 @@ open class TextNode: ASDisplayNode {
                     context.restoreGState()
                     context.resetClip()
                 case .code:
-                    break
+                    if blockQuote.data.title != nil {
+                        let quoteRect = CGRect(origin: CGPoint(x: blockFrame.maxX - 4.0 - codeIcon.size.width, y: blockFrame.minY + 4.0), size: codeIcon.size)
+                        context.saveGState()
+                        context.translateBy(x: quoteRect.midX, y: quoteRect.midY)
+                        context.scaleBy(x: 1.0, y: -1.0)
+                        context.translateBy(x: -quoteRect.midX, y: -quoteRect.midY)
+                        context.clip(to: quoteRect, mask: codeIcon.cgImage!)
+                        context.fill(quoteRect)
+                        context.restoreGState()
+                        context.resetClip()
+                    }
                 }
                 
                 let lineFrame = CGRect(origin: CGPoint(x: blockFrame.minX, y: blockFrame.minY), size: CGSize(width: lineWidth, height: blockFrame.height))

submodules/TelegramUI/Images.xcassets/Chat/Message/TextCodeIcon.imageset/Contents.json

@@ -0,0 +1,12 @@
+{
+  "images" : [
+    {
+      "filename" : "codemini.pdf",
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

submodules/TelegramUI/Images.xcassets/Chat/Message/TextCodeIcon.imageset/codemini.pdf

@@ -0,0 +1,147 @@
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submodules/TextFormat/Sources/StringWithAppliedEntities.swift

@@ -215,9 +215,11 @@ public func stringWithAppliedEntities(_ text: String, entities: [MessageTextEnti
                     nsString = text as NSString
                 }
                 if let codeBlockTitleColor, let codeBlockAccentColor, let codeBlockBackgroundColor {
-                    string.addAttribute(NSAttributedString.Key(rawValue: "Attribute__Blockquote"), value: TextNodeBlockQuoteData(kind: .code(language: language), title: language.flatMap {
+                    var title: NSAttributedString?
-                        NSAttributedString(string: $0.capitalized, font: boldFont.withSize(round(boldFont.pointSize * 0.8235294117647058)), textColor: codeBlockTitleColor)
+                    if let language, !language.isEmpty {
-                    }, color: codeBlockAccentColor, secondaryColor: nil, tertiaryColor: nil, backgroundColor: codeBlockBackgroundColor), range: range)
+                        title = NSAttributedString(string: language.capitalized, font: boldFont.withSize(round(boldFont.pointSize * 0.8235294117647058)), textColor: codeBlockTitleColor)
+                    }
+                    string.addAttribute(NSAttributedString.Key(rawValue: "Attribute__Blockquote"), value: TextNodeBlockQuoteData(kind: .code(language: language), title: title, color: codeBlockAccentColor, secondaryColor: nil, tertiaryColor: nil, backgroundColor: codeBlockBackgroundColor), range: range)
                 }
             case .BlockQuote:
                 addFontAttributes(range, .blockQuote)