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