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| ** |
| ** Copyright (C) 2017 Crimson AS <info@crimson.no> |
| ** Copyright (C) 2018 The Qt Company Ltd. |
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| ** This file is part of the QtQml module of the Qt Toolkit. |
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| ** GNU Lesser General Public License Usage |
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| ** General Public License version 3 as published by the Free Software |
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| ** |
| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU |
| ** General Public License version 2.0 or (at your option) the GNU General |
| ** Public license version 3 or any later version approved by the KDE Free |
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| ****************************************************************************/ |
| |
| #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.length(); |
| |
| 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); |
| } |
| |