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40 | |
41 | #include <private/qv4iterator_p.h> |
42 | #include <private/qv4stringiterator_p.h> |
43 | #include <private/qv4symbol_p.h> |
44 | |
45 | using namespace QV4; |
46 | |
47 | DEFINE_OBJECT_VTABLE(StringIteratorObject); |
48 | |
49 | void StringIteratorPrototype::init(ExecutionEngine *e) |
50 | { |
51 | defineDefaultProperty(QStringLiteral("next" ), code: method_next, argumentCount: 0); |
52 | |
53 | Scope scope(e); |
54 | ScopedString val(scope, e->newString(s: QLatin1String("String Iterator" ))); |
55 | defineReadonlyConfigurableProperty(name: e->symbol_toStringTag(), value: val); |
56 | } |
57 | |
58 | ReturnedValue StringIteratorPrototype::method_next(const FunctionObject *b, const Value *that, const Value *, int) |
59 | { |
60 | Scope scope(b); |
61 | const StringIteratorObject *thisObject = that->as<StringIteratorObject>(); |
62 | if (!thisObject) |
63 | return scope.engine->throwTypeError(message: QLatin1String("Not an String Iterator instance" )); |
64 | |
65 | ScopedString s(scope, thisObject->d()->iteratedString); |
66 | if (!s) { |
67 | QV4::Value undefined = Value::undefinedValue(); |
68 | return IteratorPrototype::createIterResultObject(engine: scope.engine, value: undefined, done: true); |
69 | } |
70 | |
71 | quint32 index = thisObject->d()->nextIndex; |
72 | |
73 | QString str = s->toQString(); |
74 | quint32 len = str.length(); |
75 | |
76 | if (index >= len) { |
77 | thisObject->d()->iteratedString.set(e: scope.engine, newVal: nullptr); |
78 | QV4::Value undefined = Value::undefinedValue(); |
79 | return IteratorPrototype::createIterResultObject(engine: scope.engine, value: undefined, done: true); |
80 | } |
81 | |
82 | QChar ch = str.at(i: index); |
83 | int num = 1; |
84 | if (ch.unicode() >= 0xd800 && ch.unicode() <= 0xdbff && index + 1 != len) { |
85 | ch = str.at(i: index + 1); |
86 | if (ch.unicode() >= 0xdc00 && ch.unicode() <= 0xdfff) |
87 | num = 2; |
88 | } |
89 | |
90 | thisObject->d()->nextIndex += num; |
91 | |
92 | ScopedString resultString(scope, scope.engine->newString(s: s->toQString().mid(position: index, n: num))); |
93 | return IteratorPrototype::createIterResultObject(engine: scope.engine, value: resultString, done: false); |
94 | } |
95 | |
96 | |