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wrap dart object to js.

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This commit is contained in:
ekibun
2021-01-18 02:02:12 +08:00
parent 8e950c5b14
commit 7de32aac0b
9 changed files with 104 additions and 29 deletions
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63
lib/wrapper.dart
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@@ -37,6 +37,26 @@ class JSRefValue implements JSRef {
}
}
class DartObject implements JSRef {
Object obj;
Pointer ctx;
DartObject(this.ctx, this.obj) {
runtimeOpaques[jsGetRuntime(ctx)]?.ref?.add(this);
}
static DartObject fromAddress(Pointer ctx, int val) {
return runtimeOpaques[jsGetRuntime(ctx)]?.ref?.firstWhere(
(e) => identityHashCode(e) == val,
orElse: null,
);
}
@override
void release() {
ctx = null;
}
}
class JSPromise extends JSRefValue {
Completer completer;
JSPromise(Pointer ctx, Pointer val, this.completer) : super(ctx, val);
@@ -123,6 +143,7 @@ String parseJSException(Pointer ctx, {Pointer e}) {
}
Pointer dartToJs(Pointer ctx, dynamic val, {Map<dynamic, dynamic> cache}) {
if (val == null) return jsUNDEFINED();
if (val is Future) {
var resolvingFunc = allocate<Uint8>(count: sizeOfJSValue * 2);
var resolvingFunc2 =
@@ -195,7 +216,7 @@ Pointer dartToJs(Pointer ctx, dynamic val, {Map<dynamic, dynamic> cache}) {
}
return ret;
}
return jsUNDEFINED();
return runtimeOpaques[jsGetRuntime(ctx)]?.objectWrapper(val) ?? jsUNDEFINED();
}
dynamic jsToDart(Pointer ctx, Pointer val, {Map<int, dynamic> cache}) {
@@ -262,6 +283,10 @@ dynamic jsToDart(Pointer ctx, Pointer val, {Map<int, dynamic> cache}) {
}
jsFree(ctx, ptab.value);
free(ptab);
final objHash = ret["__dart_obj_hash__"];
if (objHash is int) {
return DartObject.fromAddress(ctx, objHash)?.obj ?? ret;
}
return ret;
}
break;
@@ -272,6 +297,9 @@ dynamic jsToDart(Pointer ctx, Pointer val, {Map<int, dynamic> cache}) {
Pointer jsNewContextWithPromsieWrapper(Pointer rt) {
var ctx = jsNewContext(rt);
final runtimeOpaque = runtimeOpaques[rt];
if (runtimeOpaque == null) throw Exception("Runtime has been released!");
var jsPromiseWrapper = jsEval(
ctx,
"""
@@ -290,17 +318,42 @@ Pointer jsNewContextWithPromsieWrapper(Pointer rt) {
""",
"<future>",
JSEvalFlag.GLOBAL);
var promiseWrapper = JSRefValue(ctx, jsPromiseWrapper);
var jsObjectWrapper = jsEval(
ctx,
"""
(objHash, type) => {
const ret = {
"__dart_obj_hash__": objHash,
};
ret.__proto__.toString = ()=> "" + type;
return ret;
};
""",
"<future>",
JSEvalFlag.GLOBAL);
final promiseWrapper = JSRefValue(ctx, jsPromiseWrapper);
jsFreeValue(ctx, jsPromiseWrapper);
runtimeOpaques[rt].promiseToFuture = (promise) {
final objectWrapper = JSRefValue(ctx, jsObjectWrapper);
jsFreeValue(ctx, jsObjectWrapper);
runtimeOpaque.promiseToFuture = (promise) {
var completer = Completer();
var wrapper = promiseWrapper.val;
if (wrapper == null)
completer.completeError(Exception("Runtime has been released!"));
var jsPromise = jsCall(ctx, wrapper, null, [promise]);
runtimeOpaques[rt].ref.add(JSPromise(ctx, jsPromise, completer));
var wrapPromise = JSPromise(ctx, jsPromise, completer);
jsFreeValue(ctx, jsPromise);
return completer.future;
return wrapPromise.completer.future;
};
runtimeOpaque.objectWrapper = (obj) {
var jsObjHash = jsNewInt64(ctx, identityHashCode(DartObject(ctx, obj)));
var jsTypeString = jsNewString(ctx, obj.toString());
var wrapper = objectWrapper.val;
if (wrapper == null) throw Exception("Runtime has been released!");
var ret = jsCall(ctx, wrapper, null, [jsObjHash, jsTypeString]);
jsFreeValue(ctx, jsObjHash);
jsFreeValue(ctx, jsTypeString);
return ret;
};
return ctx;