Setup NSTextAttachmentViewProvider

2026-04-26 19:34:25 +02:00 · 2022-04-27 11:55:23 +02:00
parent 5c0ed53401
commit 3d4657fc3b
12 changed files with 235 additions and 98 deletions
@@ -24,4 +24,24 @@ public extension NSAttributedString {
        result.removeAttribute(.link, range: NSRange(location: 0, length: length))
        return result
    }
+    
+    /// Enumerate attribute for given key and conveniently ignore any attribute that doesn't match given generic type.
+    ///
+    /// - Parameters:
+    ///   - attrName: The name of the attribute to enumerate.
+    ///   - enumerationRange: The range over which the attribute values are enumerated.
+    ///   - opts: The options used by the enumeration. For possible values, see NSAttributedStringEnumerationOptions.
+    ///   - block: The block to apply to ranges of the specified attribute in the attributed string.
+    func vc_enumerateAttribute<T>(_ attrName: NSAttributedString.Key,
+                                  in enumerationRange: NSRange,
+                                  options opts: NSAttributedString.EnumerationOptions = [],
+                                  using block: (T, NSRange, UnsafeMutablePointer<ObjCBool>) -> Void) {
+        self.enumerateAttribute(attrName,
+                                in: enumerationRange,
+                                options: opts) { (attr: Any?, range: NSRange, stop: UnsafeMutablePointer<ObjCBool>) in
+            guard let typedAttr = attr as? T else { return }
+            
+            block(typedAttr, range, stop)
+        }
+    }
 }