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nullsafety

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This commit is contained in:
ekibun
2021-02-22 16:15:46 +08:00
parent 8fb26b20af
commit e87f50956a
9 changed files with 176 additions and 140 deletions
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112
lib/src/object.dart
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@@ -48,17 +48,18 @@ class _DartFunction extends JSInvokable {
/// implement this to capture js object release.
class _DartObject extends JSRef implements JSRefLeakable {
Object _obj;
Pointer<JSContext> _ctx;
_DartObject(this._ctx, this._obj) {
if (_obj is JSRef) {
(_obj as JSRef).dup();
}
runtimeOpaques[jsGetRuntime(_ctx)]?.addRef(this);
Object? _obj;
Pointer<JSContext>? _ctx;
_DartObject(Pointer<JSContext> ctx, dynamic obj) {
_ctx = ctx;
_obj = obj;
if (obj is JSRef) obj.dup();
runtimeOpaques[jsGetRuntime(ctx)]?.addRef(this);
}
static _DartObject fromAddress(Pointer<JSRuntime> rt, int val) {
return runtimeOpaques[rt]?.getRef((e) => identityHashCode(e) == val);
static _DartObject? fromAddress(Pointer<JSRuntime> rt, int val) {
return runtimeOpaques[rt]?.getRef((e) => identityHashCode(e) == val)
as _DartObject?;
}
@override
@@ -69,20 +70,20 @@ class _DartObject extends JSRef implements JSRefLeakable {
@override
void destroy() {
if (_ctx == null) return;
runtimeOpaques[jsGetRuntime(_ctx)]?.removeRef(this);
final ctx = _ctx;
final obj = _obj;
_ctx = null;
if (_obj is JSRef) {
(_obj as JSRef).free();
}
_obj = null;
if (ctx == null) return;
runtimeOpaques[jsGetRuntime(ctx)]?.removeRef(this);
if (obj is JSRef) obj.free();
}
}
/// JS Error wrapper
class JSError extends _IsolateEncodable {
String message;
String stack;
late String message;
late String stack;
JSError(message, [stack]) {
if (message is JSError) {
this.message = message.message;
@@ -95,10 +96,10 @@ class JSError extends _IsolateEncodable {
@override
String toString() {
return stack == null ? message.toString() : "$message\n$stack";
return stack.isEmpty ? message.toString() : "$message\n$stack";
}
static JSError _decode(Map obj) {
static JSError? _decode(Map obj) {
if (obj.containsKey(#jsError))
return JSError(obj[#jsError], obj[#jsErrorStack]);
return null;
@@ -116,30 +117,33 @@ class JSError extends _IsolateEncodable {
/// JS Object reference
/// call [release] to release js object.
class _JSObject extends JSRef {
Pointer<JSValue> _val;
Pointer<JSContext> _ctx;
Pointer<JSValue>? _val;
Pointer<JSContext>? _ctx;
/// Create
_JSObject(this._ctx, Pointer<JSValue> _val) {
final rt = jsGetRuntime(_ctx);
this._val = jsDupValue(_ctx, _val);
_JSObject(Pointer<JSContext> ctx, Pointer<JSValue> val) {
this._ctx = ctx;
final rt = jsGetRuntime(ctx);
this._val = jsDupValue(ctx, val);
runtimeOpaques[rt]?.addRef(this);
}
@override
void destroy() {
if (_val == null) return;
final rt = jsGetRuntime(_ctx);
runtimeOpaques[rt]?.removeRef(this);
jsFreeValue(_ctx, _val);
final ctx = _ctx;
final val = _val;
_val = null;
_ctx = null;
if (ctx == null || val == null) return;
final rt = jsGetRuntime(ctx);
runtimeOpaques[rt]?.removeRef(this);
jsFreeValue(ctx, val);
}
@override
String toString() {
if (_val == null) return "JSObject(released)";
return jsToCString(_ctx, _val);
if (_ctx == null || _val == null) return "JSObject(released)";
return jsToCString(_ctx!, _val!);
}
}
@@ -150,29 +154,32 @@ class _JSFunction extends _JSObject implements JSInvokable, _IsolateEncodable {
@override
invoke(List<dynamic> arguments, [dynamic thisVal]) {
final jsRet = _invoke(arguments, thisVal);
if (jsRet == null) return;
final ctx = _ctx!;
bool isException = jsIsException(jsRet) != 0;
if (isException) {
jsFreeValue(_ctx, jsRet);
throw _parseJSException(_ctx);
jsFreeValue(ctx, jsRet);
throw _parseJSException(ctx);
}
final ret = _jsToDart(_ctx, jsRet);
jsFreeValue(_ctx, jsRet);
final ret = _jsToDart(ctx, jsRet);
jsFreeValue(ctx, jsRet);
return ret;
}
Pointer<JSValue> _invoke(List<dynamic> arguments, [dynamic thisVal]) {
if (_val == null) throw JSError("InternalError: JSValue released");
final ctx = _ctx;
final val = _val;
if (ctx == null || val == null)
throw JSError("InternalError: JSValue released");
final args = arguments
.map(
(e) => _dartToJs(_ctx, e),
(e) => _dartToJs(ctx, e),
)
.toList();
final jsThis = _dartToJs(_ctx, thisVal);
final jsRet = jsCall(_ctx, _val, jsThis, args);
jsFreeValue(_ctx, jsThis);
final jsThis = _dartToJs(ctx, thisVal);
final jsRet = jsCall(ctx, val, jsThis, args);
jsFreeValue(ctx, jsThis);
for (final jsArg in args) {
jsFreeValue(_ctx, jsArg);
jsFreeValue(ctx, jsArg);
}
return jsRet;
}
@@ -185,9 +192,9 @@ class _JSFunction extends _JSObject implements JSInvokable, _IsolateEncodable {
/// Dart function wrapper for isolate
class IsolateFunction extends JSInvokable implements _IsolateEncodable {
int _isolateId;
SendPort _port;
JSInvokable _invokable;
int? _isolateId;
SendPort? _port;
JSInvokable? _invokable;
IsolateFunction._fromId(this._isolateId, this._port);
IsolateFunction._new(this._invokable) {
@@ -195,18 +202,17 @@ class IsolateFunction extends JSInvokable implements _IsolateEncodable {
}
IsolateFunction(Function func) : this._new(_DartFunction(func));
static ReceivePort _invokeHandler;
static ReceivePort? _invokeHandler;
static Set<IsolateFunction> _handlers = Set();
static get _handlePort {
if (_invokeHandler == null) {
_invokeHandler = ReceivePort();
_invokeHandler.listen((msg) async {
_invokeHandler!.listen((msg) async {
final msgPort = msg[#port];
try {
final handler = _handlers.firstWhere(
final handler = _handlers.firstWhereOrNull(
(v) => identityHashCode(v) == msg[#handler],
orElse: () => null,
);
if (handler == null) throw JSError('handler released');
final ret = _encodeData(await handler._handle(msg[#msg]));
@@ -220,13 +226,14 @@ class IsolateFunction extends JSInvokable implements _IsolateEncodable {
}
});
}
return _invokeHandler.sendPort;
return _invokeHandler!.sendPort;
}
_send(msg) async {
if (_port == null) return _handle(msg);
final port = _port;
if (port == null) return _handle(msg);
final evaluatePort = ReceivePort();
_port.send({
port.send({
#handler: _isolateId,
#msg: msg,
#port: evaluatePort.sendPort,
@@ -240,6 +247,7 @@ class IsolateFunction extends JSInvokable implements _IsolateEncodable {
_destroy() {
_handlers.remove(this);
_invokable?.free();
_invokable = null;
}
_handle(msg) async {
@@ -257,7 +265,7 @@ class IsolateFunction extends JSInvokable implements _IsolateEncodable {
}
final List args = _decodeData(msg[#args]);
final thisVal = _decodeData(msg[#thisVal]);
return _invokable.invoke(args, thisVal);
return _invokable?.invoke(args, thisVal);
}
@override
@@ -270,7 +278,7 @@ class IsolateFunction extends JSInvokable implements _IsolateEncodable {
});
}
static IsolateFunction _decode(Map obj) {
static IsolateFunction? _decode(Map obj) {
if (obj.containsKey(#jsFunctionPort))
return IsolateFunction._fromId(
obj[#jsFunctionId],