GeezerVisonThe World Wide Web, restored to 800 pixels of glory. |
| Home|About|Gaming cabinet|Archives|How it works|Starter sites |
GeezerVison is showing github.com — JavaScriptKit/Sources/JavaScriptKit/JSValue.swift at main · swifweb/JavaScriptKit Expand file tree/ Copy pathJSValue.swiftMore file actions 270 lines (239 loc) · 8.24 KB / Copy pathJSValue.swiftFile metadata and controls270 lines (239 loc) · 8.24 KB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 import _CJavaScriptKit /// `JSValue` represents a value in JavaScript. @dynamicMemberLookup public enum JSValue: Equatable { case boolean(Bool) case string(JSString) case number(Double) case object(JSObject) case null case undefined case function(JSFunction) case symbol(JSSymbol) case bigInt(JSBigInt) /// Returns the `Bool` value of this JS value if its type is boolean. /// If not, returns `nil`. public var boolean: Bool? { switch self { case let .boolean(boolean): return boolean default: return nil } } /// Returns the `String` value of this JS value if the type is string. /// If not, returns `nil`. /// /// Note that this accessor may copy the JS string value into Swift side memory. /// /// To avoid the copying, please consider the `jsString` instead. public var string: String? { jsString.map(String.init) } /// Returns the `JSString` value of this JS value if the type is string. /// If not, returns `nil`. /// public var jsString: JSString? { switch self { case let .string(string): return string default: return nil } } /// Returns the `Double` value of this JS value if the type is number. /// If not, returns `nil`. public var number: Double? { switch self { case let .number(number): return number default: return nil } } /// Returns the `JSObject` of this JS value if its type is object. /// If not, returns `nil`. public var object: JSObject? { switch self { case let .object(object): return object default: return nil } } /// Returns the `JSFunction` of this JS value if its type is function. /// If not, returns `nil`. public var function: JSFunction? { switch self { case let .function(function): return function default: return nil } } /// Returns the `JSSymbol` of this JS value if its type is function. /// If not, returns `nil`. public var symbol: JSSymbol? { switch self { case let .symbol(symbol): return symbol default: return nil } } /// Returns the `JSBigInt` of this JS value if its type is function. /// If not, returns `nil`. public var bigInt: JSBigInt? { switch self { case let .bigInt(bigInt): return bigInt default: return nil } } /// Returns the `true` if this JS value is null. /// If not, returns `false`. public var isNull: Bool { return self == .null } /// Returns the `true` if this JS value is undefined. /// If not, returns `false`. public var isUndefined: Bool { return self == .undefined } } public extension JSValue { /// An unsafe convenience method of `JSObject.subscript(_ name: String) -> ((ConvertibleToJSValue...) -> JSValue)?` /// - Precondition: `self` must be a JavaScript Object and specified member should be a callable object. subscript(dynamicMember name: String) -> ((ConvertibleToJSValue...) -> JSValue) { object![dynamicMember: name]! } /// An unsafe convenience method of `JSObject.subscript(_ index: Int) -> JSValue` /// - Precondition: `self` must be a JavaScript Object. subscript(dynamicMember name: String) -> JSValue { get { self.object![name] } set { self.object![name] = newValue } } /// An unsafe convenience method of `JSObject.subscript(_ index: Int) -> JSValue` /// - Precondition: `self` must be a JavaScript Object. subscript(_ index: Int) -> JSValue { get { object![index] } set { object![index] = newValue } } } extension JSValue: Swift.Error {} public extension JSValue { func fromJSValue<Type>() -> Type? where Type: ConstructibleFromJSValue { return Type.construct(from: self) } } public extension JSValue { static func string(_ value: String) -> JSValue { .string(JSString(value)) } /// Deprecated: Please create `JSClosure` directly and manage its lifetime manually. /// /// Migrate this usage /// /// ```swift /// button.addEventListener!("click", JSValue.function { _ in /// ... /// return JSValue.undefined /// }) /// ``` /// /// into below code. /// /// ```swift /// let eventListenter = JSClosure { _ in /// ... /// return JSValue.undefined /// } /// /// button.addEventListener!("click", JSValue.function(eventListenter)) /// ... /// button.removeEventListener!("click", JSValue.function(eventListenter)) /// eventListenter.release() /// ``` @available(*, deprecated, message: "Please create JSClosure directly and manage its lifetime manually.") static func function(_ body: @escaping ([JSValue]) -> JSValue) -> JSValue { .object(JSClosure(body)) } @available(*, deprecated, renamed: "object", message: "JSClosure is no longer a subclass of JSFunction. Use .object(closure) instead.") static func function(_ closure: JSClosure) -> JSValue { .object(closure) } } extension JSValue: ExpressibleByStringLiteral { public init(stringLiteral value: String) { self = .string(JSString(value)) } } extension JSValue: ExpressibleByIntegerLiteral { public init(integerLiteral value: Int32) { self = .number(Double(value)) } } extension JSValue: ExpressibleByFloatLiteral { public init(floatLiteral value: Double) { self = .number(value) } } extension JSValue: ExpressibleByNilLiteral { public init(nilLiteral _: ()) { self = .null } } public func getJSValue(this: JSObject, name: JSString) -> JSValue { var rawValue = RawJSValue() let rawBitPattern = swjs_get_prop( this.id, name.asInternalJSRef(), &rawValue.payload1, &rawValue.payload2 ) rawValue.kind = unsafeBitCast(rawBitPattern, to: JavaScriptValueKind.self) return rawValue.jsValue } public func setJSValue(this: JSObject, name: JSString, value: JSValue) { value.withRawJSValue { rawValue in swjs_set_prop(this.id, name.asInternalJSRef(), rawValue.kind, rawValue.payload1, rawValue.payload2) } } public func getJSValue(this: JSObject, index: Int32) -> JSValue { var rawValue = RawJSValue() let rawBitPattern = swjs_get_subscript( this.id, index, &rawValue.payload1, &rawValue.payload2 ) rawValue.kind = unsafeBitCast(rawBitPattern, to: JavaScriptValueKind.self) return rawValue.jsValue } public func setJSValue(this: JSObject, index: Int32, value: JSValue) { value.withRawJSValue { rawValue in swjs_set_subscript(this.id, index, rawValue.kind, rawValue.payload1, rawValue.payload2) } } public func getJSValue(this: JSObject, symbol: JSSymbol) -> JSValue { var rawValue = RawJSValue() let rawBitPattern = swjs_get_prop( this.id, symbol.id, &rawValue.payload1, &rawValue.payload2 ) rawValue.kind = unsafeBitCast(rawBitPattern, to: JavaScriptValueKind.self) return rawValue.jsValue } public func setJSValue(this: JSObject, symbol: JSSymbol, value: JSValue) { value.withRawJSValue { rawValue in swjs_set_prop(this.id, symbol.id, rawValue.kind, rawValue.payload1, rawValue.payload2) } } public extension JSValue { /// Return `true` if this value is an instance of the passed `constructor` function. /// Returns `false` for everything except objects and functions. /// - Parameter constructor: The constructor function to check. /// - Returns: The result of `instanceof` in the JavaScript environment. func isInstanceOf(_ constructor: JSFunction) -> Bool { switch self { case .boolean, .string, .number, .null, .undefined, .symbol, .bigInt: return false case let .object(ref): return ref.isInstanceOf(constructor) case let .function(ref): return ref.isInstanceOf(constructor) } } } extension JSValue: CustomStringConvertible { public var description: String { // per https://tc39.es/ecma262/multipage/text-processing.html#sec-string-constructor-string-value // this always returns a string JSObject.global.String.function!(self).string! } } |
| You are visitor 01402503 — GeezerVison does not store the pages you look up. Best viewed with Netscape Navigator 4.7 or Internet Explorer 6 at 800×600. No cookies required. |