|
| 1 | +let buildArgsList; |
| 2 | + |
| 3 | +// `modulePromise` is a promise to the `WebAssembly.module` object to be |
| 4 | +// instantiated. |
| 5 | +// `importObjectPromise` is a promise to an object that contains any additional |
| 6 | +// imports needed by the module that aren't provided by the standard runtime. |
| 7 | +// The fields on this object will be merged into the importObject with which |
| 8 | +// the module will be instantiated. |
| 9 | +// This function returns a promise to the instantiated module. |
| 10 | +export const instantiate = async (modulePromise, importObjectPromise) => { |
| 11 | + let dartInstance; |
| 12 | + |
| 13 | + function stringFromDartString(string) { |
| 14 | + const totalLength = dartInstance.exports.$stringLength(string); |
| 15 | + let result = ''; |
| 16 | + let index = 0; |
| 17 | + while (index < totalLength) { |
| 18 | + let chunkLength = Math.min(totalLength - index, 0xFFFF); |
| 19 | + const array = new Array(chunkLength); |
| 20 | + for (let i = 0; i < chunkLength; i++) { |
| 21 | + array[i] = dartInstance.exports.$stringRead(string, index++); |
| 22 | + } |
| 23 | + result += String.fromCharCode(...array); |
| 24 | + } |
| 25 | + return result; |
| 26 | + } |
| 27 | + |
| 28 | + function stringToDartString(string) { |
| 29 | + const length = string.length; |
| 30 | + let range = 0; |
| 31 | + for (let i = 0; i < length; i++) { |
| 32 | + range |= string.codePointAt(i); |
| 33 | + } |
| 34 | + if (range < 256) { |
| 35 | + const dartString = dartInstance.exports.$stringAllocate1(length); |
| 36 | + for (let i = 0; i < length; i++) { |
| 37 | + dartInstance.exports.$stringWrite1(dartString, i, string.codePointAt(i)); |
| 38 | + } |
| 39 | + return dartString; |
| 40 | + } else { |
| 41 | + const dartString = dartInstance.exports.$stringAllocate2(length); |
| 42 | + for (let i = 0; i < length; i++) { |
| 43 | + dartInstance.exports.$stringWrite2(dartString, i, string.charCodeAt(i)); |
| 44 | + } |
| 45 | + return dartString; |
| 46 | + } |
| 47 | + } |
| 48 | + |
| 49 | + // Prints to the console |
| 50 | + function printToConsole(value) { |
| 51 | + if (typeof dartPrint == "function") { |
| 52 | + dartPrint(value); |
| 53 | + return; |
| 54 | + } |
| 55 | + if (typeof console == "object" && typeof console.log != "undefined") { |
| 56 | + console.log(value); |
| 57 | + return; |
| 58 | + } |
| 59 | + if (typeof print == "function") { |
| 60 | + print(value); |
| 61 | + return; |
| 62 | + } |
| 63 | + |
| 64 | + throw "Unable to print message: " + js; |
| 65 | + } |
| 66 | + |
| 67 | + // Converts a Dart List to a JS array. Any Dart objects will be converted, but |
| 68 | + // this will be cheap for JSValues. |
| 69 | + function arrayFromDartList(constructor, list) { |
| 70 | + const length = dartInstance.exports.$listLength(list); |
| 71 | + const array = new constructor(length); |
| 72 | + for (let i = 0; i < length; i++) { |
| 73 | + array[i] = dartInstance.exports.$listRead(list, i); |
| 74 | + } |
| 75 | + return array; |
| 76 | + } |
| 77 | + |
| 78 | + buildArgsList = function(list) { |
| 79 | + const dartList = dartInstance.exports.$makeStringList(); |
| 80 | + for (let i = 0; i < list.length; i++) { |
| 81 | + dartInstance.exports.$listAdd(dartList, stringToDartString(list[i])); |
| 82 | + } |
| 83 | + return dartList; |
| 84 | + } |
| 85 | + |
| 86 | + // A special symbol attached to functions that wrap Dart functions. |
| 87 | + const jsWrappedDartFunctionSymbol = Symbol("JSWrappedDartFunction"); |
| 88 | + |
| 89 | + function finalizeWrapper(dartFunction, wrapped) { |
| 90 | + wrapped.dartFunction = dartFunction; |
| 91 | + wrapped[jsWrappedDartFunctionSymbol] = true; |
| 92 | + return wrapped; |
| 93 | + } |
| 94 | + |
| 95 | + // Imports |
| 96 | + const dart2wasm = { |
| 97 | + |
| 98 | +_18: f => finalizeWrapper(f,x0 => dartInstance.exports._18(f,x0)), |
| 99 | +_19: f => finalizeWrapper(f,x0 => dartInstance.exports._19(f,x0)), |
| 100 | +_101: x0 => x0.text(), |
| 101 | +_170: (x0,x1) => globalThis.fetch(x0,x1), |
| 102 | +_12887: v => stringToDartString(v.toString()), |
| 103 | +_12902: () => { |
| 104 | + let stackString = new Error().stack.toString(); |
| 105 | + let frames = stackString.split('\n'); |
| 106 | + let drop = 2; |
| 107 | + if (frames[0] === 'Error') { |
| 108 | + drop += 1; |
| 109 | + } |
| 110 | + return frames.slice(drop).join('\n'); |
| 111 | + }, |
| 112 | +_12911: s => stringToDartString(JSON.stringify(stringFromDartString(s))), |
| 113 | +_12912: s => printToConsole(stringFromDartString(s)), |
| 114 | +_12930: (c) => |
| 115 | + queueMicrotask(() => dartInstance.exports.$invokeCallback(c)), |
| 116 | +_12932: (a, i) => a.push(i), |
| 117 | +_12943: a => a.length, |
| 118 | +_12945: (a, i) => a[i], |
| 119 | +_12946: (a, i, v) => a[i] = v, |
| 120 | +_12948: a => a.join(''), |
| 121 | +_12958: (s, p, i) => s.indexOf(p, i), |
| 122 | +_12961: (o, start, length) => new Uint8Array(o.buffer, o.byteOffset + start, length), |
| 123 | +_12962: (o, start, length) => new Int8Array(o.buffer, o.byteOffset + start, length), |
| 124 | +_12963: (o, start, length) => new Uint8ClampedArray(o.buffer, o.byteOffset + start, length), |
| 125 | +_12964: (o, start, length) => new Uint16Array(o.buffer, o.byteOffset + start, length), |
| 126 | +_12965: (o, start, length) => new Int16Array(o.buffer, o.byteOffset + start, length), |
| 127 | +_12966: (o, start, length) => new Uint32Array(o.buffer, o.byteOffset + start, length), |
| 128 | +_12967: (o, start, length) => new Int32Array(o.buffer, o.byteOffset + start, length), |
| 129 | +_12970: (o, start, length) => new Float32Array(o.buffer, o.byteOffset + start, length), |
| 130 | +_12971: (o, start, length) => new Float64Array(o.buffer, o.byteOffset + start, length), |
| 131 | +_12975: (o) => new DataView(o.buffer, o.byteOffset, o.byteLength), |
| 132 | +_12979: Function.prototype.call.bind(Object.getOwnPropertyDescriptor(DataView.prototype, 'byteLength').get), |
| 133 | +_12980: (b, o) => new DataView(b, o), |
| 134 | +_12982: Function.prototype.call.bind(DataView.prototype.getUint8), |
| 135 | +_12984: Function.prototype.call.bind(DataView.prototype.getInt8), |
| 136 | +_12986: Function.prototype.call.bind(DataView.prototype.getUint16), |
| 137 | +_12988: Function.prototype.call.bind(DataView.prototype.getInt16), |
| 138 | +_12990: Function.prototype.call.bind(DataView.prototype.getUint32), |
| 139 | +_12992: Function.prototype.call.bind(DataView.prototype.getInt32), |
| 140 | +_12998: Function.prototype.call.bind(DataView.prototype.getFloat32), |
| 141 | +_13000: Function.prototype.call.bind(DataView.prototype.getFloat64), |
| 142 | +_13021: o => o === undefined, |
| 143 | +_13022: o => typeof o === 'boolean', |
| 144 | +_13023: o => typeof o === 'number', |
| 145 | +_13025: o => typeof o === 'string', |
| 146 | +_13028: o => o instanceof Int8Array, |
| 147 | +_13029: o => o instanceof Uint8Array, |
| 148 | +_13030: o => o instanceof Uint8ClampedArray, |
| 149 | +_13031: o => o instanceof Int16Array, |
| 150 | +_13032: o => o instanceof Uint16Array, |
| 151 | +_13033: o => o instanceof Int32Array, |
| 152 | +_13034: o => o instanceof Uint32Array, |
| 153 | +_13035: o => o instanceof Float32Array, |
| 154 | +_13036: o => o instanceof Float64Array, |
| 155 | +_13037: o => o instanceof ArrayBuffer, |
| 156 | +_13038: o => o instanceof DataView, |
| 157 | +_13039: o => o instanceof Array, |
| 158 | +_13040: o => typeof o === 'function' && o[jsWrappedDartFunctionSymbol] === true, |
| 159 | +_13044: (l, r) => l === r, |
| 160 | +_13045: o => o, |
| 161 | +_13046: o => o, |
| 162 | +_13047: o => o, |
| 163 | +_13048: b => !!b, |
| 164 | +_13049: o => o.length, |
| 165 | +_13052: (o, i) => o[i], |
| 166 | +_13053: f => f.dartFunction, |
| 167 | +_13054: l => arrayFromDartList(Int8Array, l), |
| 168 | +_13055: l => arrayFromDartList(Uint8Array, l), |
| 169 | +_13056: l => arrayFromDartList(Uint8ClampedArray, l), |
| 170 | +_13057: l => arrayFromDartList(Int16Array, l), |
| 171 | +_13058: l => arrayFromDartList(Uint16Array, l), |
| 172 | +_13059: l => arrayFromDartList(Int32Array, l), |
| 173 | +_13060: l => arrayFromDartList(Uint32Array, l), |
| 174 | +_13061: l => arrayFromDartList(Float32Array, l), |
| 175 | +_13062: l => arrayFromDartList(Float64Array, l), |
| 176 | +_13063: (data, length) => { |
| 177 | + const view = new DataView(new ArrayBuffer(length)); |
| 178 | + for (let i = 0; i < length; i++) { |
| 179 | + view.setUint8(i, dartInstance.exports.$byteDataGetUint8(data, i)); |
| 180 | + } |
| 181 | + return view; |
| 182 | + }, |
| 183 | +_13064: l => arrayFromDartList(Array, l), |
| 184 | +_13065: stringFromDartString, |
| 185 | +_13066: stringToDartString, |
| 186 | +_13069: l => new Array(l), |
| 187 | +_13073: (o, p) => o[p], |
| 188 | +_13077: o => String(o), |
| 189 | +_13078: (p, s, f) => p.then(s, f) |
| 190 | + }; |
| 191 | + |
| 192 | + const baseImports = { |
| 193 | + dart2wasm: dart2wasm, |
| 194 | + |
| 195 | + |
| 196 | + Math: Math, |
| 197 | + Date: Date, |
| 198 | + Object: Object, |
| 199 | + Array: Array, |
| 200 | + Reflect: Reflect, |
| 201 | + }; |
| 202 | + |
| 203 | + const jsStringPolyfill = { |
| 204 | + "charCodeAt": (s, i) => s.charCodeAt(i), |
| 205 | + "compare": (s1, s2) => { |
| 206 | + if (s1 < s2) return -1; |
| 207 | + if (s1 > s2) return 1; |
| 208 | + return 0; |
| 209 | + }, |
| 210 | + "concat": (s1, s2) => s1 + s2, |
| 211 | + "equals": (s1, s2) => s1 === s2, |
| 212 | + "fromCharCode": (i) => String.fromCharCode(i), |
| 213 | + "length": (s) => s.length, |
| 214 | + "substring": (s, a, b) => s.substring(a, b), |
| 215 | + }; |
| 216 | + |
| 217 | + dartInstance = await WebAssembly.instantiate(await modulePromise, { |
| 218 | + ...baseImports, |
| 219 | + ...(await importObjectPromise), |
| 220 | + "wasm:js-string": jsStringPolyfill, |
| 221 | + }); |
| 222 | + |
| 223 | + return dartInstance; |
| 224 | +} |
| 225 | + |
| 226 | +// Call the main function for the instantiated module |
| 227 | +// `moduleInstance` is the instantiated dart2wasm module |
| 228 | +// `args` are any arguments that should be passed into the main function. |
| 229 | +export const invoke = (moduleInstance, ...args) => { |
| 230 | + const dartMain = moduleInstance.exports.$getMain(); |
| 231 | + const dartArgs = buildArgsList(args); |
| 232 | + moduleInstance.exports.$invokeMain(dartMain, dartArgs); |
| 233 | +} |
| 234 | + |
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