63 lines
2.9 KiB
Swift
63 lines
2.9 KiB
Swift
//
|
|
// Copyright 2022 New Vector Ltd
|
|
//
|
|
// 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
|
|
|
|
public extension NSAttributedString {
|
|
|
|
/// Returns a new attributed string by removing all links from the receiver.
|
|
@objc var vc_byRemovingLinks: NSAttributedString {
|
|
let result = NSMutableAttributedString(attributedString: self)
|
|
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. If omitted, the entire range is used.
|
|
/// - 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? = nil,
|
|
options opts: NSAttributedString.EnumerationOptions = [],
|
|
using block: (T, NSRange, UnsafeMutablePointer<ObjCBool>) -> Void) {
|
|
self.enumerateAttribute(attrName,
|
|
in: enumerationRange ?? .init(location: 0, length: length),
|
|
options: opts) { (attr: Any?, range: NSRange, stop: UnsafeMutablePointer<ObjCBool>) in
|
|
guard let typedAttr = attr as? T else { return }
|
|
|
|
block(typedAttr, range, stop)
|
|
}
|
|
}
|
|
|
|
/// Creates a new attributed string with given alpha applied to all texts.
|
|
///
|
|
/// - Parameters:
|
|
/// - alpha: Alpha value to apply
|
|
/// - Returns: New attributed string with updated alpha
|
|
@objc func withTextColorAlpha(_ alpha: CGFloat) -> NSAttributedString {
|
|
let mutableString = NSMutableAttributedString(attributedString: self)
|
|
mutableString.vc_enumerateAttribute(.foregroundColor) { (color: UIColor, range: NSRange, _) in
|
|
let colorWithAlpha = color.withAlphaComponent(alpha)
|
|
mutableString.addAttribute(.foregroundColor, value: colorWithAlpha, range: range)
|
|
}
|
|
|
|
return mutableString
|
|
}
|
|
}
|