65 lines
2.4 KiB
Swift
65 lines
2.4 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 SwiftUI
|
|
|
|
extension String {
|
|
/// Returns the string as an `AttributedString` with the specified character tinted in a different color.
|
|
/// - Parameters:
|
|
/// - character: The character to be tinted.
|
|
/// - color: The color to tint the character. Defaults to the accent color.
|
|
/// - Returns: An `AttributedString`.
|
|
func tinting(_ character: Character, color: Color = .accentColor) -> AttributedString {
|
|
var string = AttributedString(self)
|
|
let characterView = string.characters
|
|
for index in characterView.indices where characterView[index] == character {
|
|
string[index..<characterView.index(after: index)].foregroundColor = color
|
|
}
|
|
|
|
return string
|
|
}
|
|
|
|
/// Calculates a numeric hash same as Element Web
|
|
/// See original function here https://github.com/matrix-org/matrix-react-sdk/blob/321dd49db4fbe360fc2ff109ac117305c955b061/src/utils/FormattingUtils.js#L47
|
|
var hashCode: Int32 {
|
|
var hash: Int32 = 0
|
|
|
|
for character in self {
|
|
let shiftedHash = hash << 5
|
|
hash = shiftedHash.subtractingReportingOverflow(hash).partialValue + Int32(character.unicodeScalars[character.unicodeScalars.startIndex].value)
|
|
}
|
|
return abs(hash)
|
|
}
|
|
|
|
var isASCII: Bool {
|
|
allSatisfy(\.isASCII)
|
|
}
|
|
|
|
func asciified() -> String? {
|
|
guard !isASCII else {
|
|
return self
|
|
}
|
|
guard !canBeConverted(to: .ascii) else {
|
|
return nil
|
|
}
|
|
let mutableString = NSMutableString(string: self)
|
|
guard CFStringTransform(mutableString, nil, "Any-Latin; Latin-ASCII; [:^ASCII:] Remove" as CFString, false) else {
|
|
return nil
|
|
}
|
|
return mutableString.trimmingCharacters(in: .whitespaces)
|
|
}
|
|
}
|