1 | // Copyright (C) 2017 Crimson AS <info@crimson.no> |
2 | // Copyright (C) 2018 The Qt Company Ltd. |
3 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
4 | |
5 | #include <private/qv4iterator_p.h> |
6 | #include <private/qv4stringiterator_p.h> |
7 | #include <private/qv4symbol_p.h> |
8 | |
9 | using namespace QV4; |
10 | |
11 | DEFINE_OBJECT_VTABLE(StringIteratorObject); |
12 | |
13 | void StringIteratorPrototype::init(ExecutionEngine *e) |
14 | { |
15 | defineDefaultProperty(QStringLiteral("next" ), code: method_next, argumentCount: 0); |
16 | |
17 | Scope scope(e); |
18 | ScopedString val(scope, e->newString(s: QLatin1String("String Iterator" ))); |
19 | defineReadonlyConfigurableProperty(name: e->symbol_toStringTag(), value: val); |
20 | } |
21 | |
22 | ReturnedValue StringIteratorPrototype::method_next(const FunctionObject *b, const Value *that, const Value *, int) |
23 | { |
24 | Scope scope(b); |
25 | const StringIteratorObject *thisObject = that->as<StringIteratorObject>(); |
26 | if (!thisObject) |
27 | return scope.engine->throwTypeError(message: QLatin1String("Not an String Iterator instance" )); |
28 | |
29 | ScopedString s(scope, thisObject->d()->iteratedString); |
30 | if (!s) { |
31 | QV4::Value undefined = Value::undefinedValue(); |
32 | return IteratorPrototype::createIterResultObject(engine: scope.engine, value: undefined, done: true); |
33 | } |
34 | |
35 | quint32 index = thisObject->d()->nextIndex; |
36 | |
37 | QString str = s->toQString(); |
38 | quint32 len = str.size(); |
39 | |
40 | if (index >= len) { |
41 | thisObject->d()->iteratedString.set(e: scope.engine, newVal: nullptr); |
42 | QV4::Value undefined = Value::undefinedValue(); |
43 | return IteratorPrototype::createIterResultObject(engine: scope.engine, value: undefined, done: true); |
44 | } |
45 | |
46 | QChar ch = str.at(i: index); |
47 | int num = 1; |
48 | if (ch.unicode() >= 0xd800 && ch.unicode() <= 0xdbff && index + 1 != len) { |
49 | ch = str.at(i: index + 1); |
50 | if (ch.unicode() >= 0xdc00 && ch.unicode() <= 0xdfff) |
51 | num = 2; |
52 | } |
53 | |
54 | thisObject->d()->nextIndex += num; |
55 | |
56 | ScopedString resultString(scope, scope.engine->newString(s: s->toQString().mid(position: index, n: num))); |
57 | return IteratorPrototype::createIterResultObject(engine: scope.engine, value: resultString, done: false); |
58 | } |
59 | |
60 | |