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38 | ****************************************************************************/ |
39 | #include "qv4objectiterator_p.h" |
40 | #include "qv4object_p.h" |
41 | #include "qv4stringobject_p.h" |
42 | #include "qv4identifier_p.h" |
43 | #include "qv4argumentsobject_p.h" |
44 | #include "qv4string_p.h" |
45 | #include "qv4iterator_p.h" |
46 | #include "qv4propertykey_p.h" |
47 | |
48 | using namespace QV4; |
49 | |
50 | void ForInIteratorPrototype::init(ExecutionEngine *) |
51 | { |
52 | defineDefaultProperty(QStringLiteral("next" ), code: method_next, argumentCount: 0); |
53 | } |
54 | |
55 | PropertyKey ObjectIterator::next(Property *pd, PropertyAttributes *attrs) |
56 | { |
57 | if (!object || !iterator) |
58 | return PropertyKey::invalid(); |
59 | |
60 | Scope scope(engine); |
61 | ScopedPropertyKey key(scope); |
62 | |
63 | while (1) { |
64 | key = iterator->next(o: object, p: pd, attrs); |
65 | if (!key->isValid()) { |
66 | object = nullptr; |
67 | return key; |
68 | } |
69 | if ((!(flags & WithSymbols) && key->isSymbol()) || |
70 | ((flags & EnumerableOnly) && !attrs->isEnumerable())) |
71 | continue; |
72 | return key; |
73 | } |
74 | } |
75 | |
76 | ReturnedValue ObjectIterator::nextPropertyName(Value *value) |
77 | { |
78 | if (!object) |
79 | return Encode::null(); |
80 | |
81 | PropertyAttributes attrs; |
82 | Scope scope(engine); |
83 | ScopedProperty p(scope); |
84 | ScopedPropertyKey key(scope, next(pd: p, attrs: &attrs)); |
85 | if (!key->isValid()) |
86 | return Encode::null(); |
87 | |
88 | *value = object->getValue(v: p->value, attrs); |
89 | if (key->isArrayIndex()) |
90 | return Encode(key->asArrayIndex()); |
91 | Q_ASSERT(key->isStringOrSymbol()); |
92 | return key->asStringOrSymbol()->asReturnedValue(); |
93 | } |
94 | |
95 | ReturnedValue ObjectIterator::nextPropertyNameAsString(Value *value) |
96 | { |
97 | if (!object) |
98 | return Encode::null(); |
99 | |
100 | PropertyAttributes attrs; |
101 | Scope scope(engine); |
102 | ScopedProperty p(scope); |
103 | ScopedPropertyKey key(scope, next(pd: p, attrs: &attrs)); |
104 | if (!key->isValid()) |
105 | return Encode::null(); |
106 | |
107 | *value = object->getValue(v: p->value, attrs); |
108 | |
109 | return key->toStringOrSymbol(e: engine)->asReturnedValue(); |
110 | } |
111 | |
112 | ReturnedValue ObjectIterator::nextPropertyNameAsString() |
113 | { |
114 | if (!object) |
115 | return Encode::null(); |
116 | |
117 | PropertyAttributes attrs; |
118 | Scope scope(engine); |
119 | ScopedPropertyKey key(scope, next(pd: nullptr, attrs: &attrs)); |
120 | if (!key->isValid()) |
121 | return Encode::null(); |
122 | |
123 | return key->toStringOrSymbol(e: engine)->asReturnedValue(); |
124 | } |
125 | |
126 | |
127 | DEFINE_OBJECT_VTABLE(ForInIteratorObject); |
128 | |
129 | void Heap::ForInIteratorObject::markObjects(Heap::Base *that, MarkStack *markStack) |
130 | { |
131 | ForInIteratorObject *o = static_cast<ForInIteratorObject *>(that); |
132 | if (o->object) |
133 | o->object->mark(markStack); |
134 | if (o->current) |
135 | o->current->mark(markStack); |
136 | o->workArea[0].mark(markStack); |
137 | o->workArea[1].mark(markStack); |
138 | Object::markObjects(base: that, stack: markStack); |
139 | } |
140 | |
141 | void Heap::ForInIteratorObject::destroy() |
142 | { |
143 | delete iterator; |
144 | } |
145 | |
146 | ReturnedValue ForInIteratorPrototype::method_next(const FunctionObject *b, const Value *thisObject, const Value *, int) |
147 | { |
148 | const ForInIteratorObject *forIn = static_cast<const ForInIteratorObject *>(thisObject); |
149 | Q_ASSERT(forIn); |
150 | Scope scope(b); |
151 | |
152 | ScopedPropertyKey key(scope, forIn->nextProperty()); |
153 | bool done = false; |
154 | if (!key->isValid()) |
155 | done = true; |
156 | ScopedStringOrSymbol s(scope, key->toStringOrSymbol(e: scope.engine)); |
157 | return IteratorPrototype::createIterResultObject(engine: scope.engine, value: s, done); |
158 | } |
159 | |
160 | |
161 | PropertyKey ForInIteratorObject::nextProperty() const |
162 | { |
163 | if (!d()->current) |
164 | return PropertyKey::invalid(); |
165 | |
166 | Scope scope(this); |
167 | ScopedObject c(scope, d()->current); |
168 | ScopedObject t(scope, d()->target); |
169 | ScopedObject o(scope); |
170 | ScopedProperty p(scope); |
171 | ScopedPropertyKey key(scope); |
172 | PropertyAttributes attrs; |
173 | |
174 | while (1) { |
175 | while (1) { |
176 | key = d()->iterator->next(o: t, p, attrs: &attrs); |
177 | if (!key->isValid()) |
178 | break; |
179 | if (!attrs.isEnumerable() || key->isSymbol()) |
180 | continue; |
181 | // check the property is not already defined earlier in the proto chain |
182 | if (d()->current != d()->object) { |
183 | o = d()->object; |
184 | bool shadowed = false; |
185 | while (o && o->d() != c->heapObject()) { |
186 | if (o->getOwnProperty(id: key) != Attr_Invalid) { |
187 | shadowed = true; |
188 | break; |
189 | } |
190 | o = o->getPrototypeOf(); |
191 | } |
192 | if (shadowed) |
193 | continue; |
194 | } |
195 | return key; |
196 | } |
197 | |
198 | c = c->getPrototypeOf(); |
199 | d()->current.set(e: scope.engine, newVal: c->d()); |
200 | if (!c) |
201 | break; |
202 | delete d()->iterator; |
203 | d()->iterator = c->ownPropertyKeys(target: t.getRef()); |
204 | d()->target.set(e: scope.engine, newVal: t->d()); |
205 | if (!d()->iterator) { |
206 | scope.engine->throwTypeError(); |
207 | return PropertyKey::invalid(); |
208 | } |
209 | } |
210 | return PropertyKey::invalid(); |
211 | } |
212 | |