Upstream version 10.39.225.0
[platform/framework/web/crosswalk.git] / src / third_party / WebKit / Source / bindings / core / v8 / ScriptPromise.cpp
1 /*
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30
31 #include "config.h"
32 #include "bindings/core/v8/ScriptPromise.h"
33
34 #include "bindings/core/v8/ExceptionMessages.h"
35 #include "bindings/core/v8/ExceptionState.h"
36 #include "bindings/core/v8/V8Binding.h"
37 #include "bindings/core/v8/V8ThrowException.h"
38 #include "core/dom/DOMException.h"
39
40 #include <v8.h>
41
42 namespace blink {
43
44 namespace {
45
46 struct WithScriptState {
47     // Used by ToV8Value<WithScriptState, ScriptState*>.
48     static v8::Handle<v8::Object> getCreationContext(ScriptState* scriptState)
49     {
50         return scriptState->context()->Global();
51     }
52 };
53
54 } // namespace
55
56 ScriptPromise::InternalResolver::InternalResolver(ScriptState* scriptState)
57     : m_resolver(scriptState, v8::Promise::Resolver::New(scriptState->isolate())) { }
58
59 v8::Local<v8::Promise> ScriptPromise::InternalResolver::v8Promise() const
60 {
61     if (m_resolver.isEmpty())
62         return v8::Local<v8::Promise>();
63     return m_resolver.v8Value().As<v8::Promise::Resolver>()->GetPromise();
64 }
65
66 ScriptPromise ScriptPromise::InternalResolver::promise() const
67 {
68     if (m_resolver.isEmpty())
69         return ScriptPromise();
70     return ScriptPromise(m_resolver.scriptState(), v8Promise());
71 }
72
73 void ScriptPromise::InternalResolver::resolve(v8::Local<v8::Value> value)
74 {
75     if (m_resolver.isEmpty())
76         return;
77     m_resolver.v8Value().As<v8::Promise::Resolver>()->Resolve(value);
78     clear();
79 }
80
81 void ScriptPromise::InternalResolver::reject(v8::Local<v8::Value> value)
82 {
83     if (m_resolver.isEmpty())
84         return;
85     m_resolver.v8Value().As<v8::Promise::Resolver>()->Reject(value);
86     clear();
87 }
88
89 ScriptPromise::ScriptPromise(ScriptState* scriptState, v8::Handle<v8::Value> value)
90     : m_scriptState(scriptState)
91 {
92     if (value.IsEmpty())
93         return;
94
95     if (!value->IsPromise()) {
96         m_promise = ScriptValue(scriptState, v8::Handle<v8::Value>());
97         V8ThrowException::throwTypeError("the given value is not a Promise", scriptState->isolate());
98         return;
99     }
100     m_promise = ScriptValue(scriptState, value);
101 }
102
103 ScriptPromise ScriptPromise::then(v8::Handle<v8::Function> onFulfilled, v8::Handle<v8::Function> onRejected)
104 {
105     if (m_promise.isEmpty())
106         return ScriptPromise();
107
108     v8::Local<v8::Object> promise = m_promise.v8Value().As<v8::Object>();
109
110     ASSERT(promise->IsPromise());
111     // Return this Promise if no handlers are given.
112     // In fact it is not the exact bahavior of Promise.prototype.then
113     // but that is not a problem in this case.
114     v8::Local<v8::Promise> resultPromise = promise.As<v8::Promise>();
115     if (!onFulfilled.IsEmpty()) {
116         resultPromise = resultPromise->Then(onFulfilled);
117         if (resultPromise.IsEmpty()) {
118             // v8::Promise::Then may return an empty value, for example when
119             // the stack is exhausted.
120             return ScriptPromise();
121         }
122     }
123     if (!onRejected.IsEmpty())
124         resultPromise = resultPromise->Catch(onRejected);
125
126     return ScriptPromise(m_scriptState.get(), resultPromise);
127 }
128
129 ScriptPromise ScriptPromise::cast(ScriptState* scriptState, const ScriptValue& value)
130 {
131     return ScriptPromise::cast(scriptState, value.v8Value());
132 }
133
134 ScriptPromise ScriptPromise::cast(ScriptState* scriptState, v8::Handle<v8::Value> value)
135 {
136     if (value.IsEmpty())
137         return ScriptPromise();
138     if (value->IsPromise()) {
139         return ScriptPromise(scriptState, value);
140     }
141     InternalResolver resolver(scriptState);
142     ScriptPromise promise = resolver.promise();
143     resolver.resolve(value);
144     return promise;
145 }
146
147 ScriptPromise ScriptPromise::reject(ScriptState* scriptState, const ScriptValue& value)
148 {
149     return ScriptPromise::reject(scriptState, value.v8Value());
150 }
151
152 ScriptPromise ScriptPromise::reject(ScriptState* scriptState, v8::Handle<v8::Value> value)
153 {
154     if (value.IsEmpty())
155         return ScriptPromise();
156     InternalResolver resolver(scriptState);
157     ScriptPromise promise = resolver.promise();
158     resolver.reject(value);
159     return promise;
160 }
161
162 ScriptPromise ScriptPromise::rejectWithDOMException(ScriptState* scriptState, PassRefPtrWillBeRawPtr<DOMException> exception)
163 {
164     ASSERT(scriptState->isolate()->InContext());
165     return reject(scriptState, V8ValueTraits<PassRefPtrWillBeRawPtr<DOMException> >::toV8Value(exception, scriptState->context()->Global(), scriptState->isolate()));
166 }
167
168 v8::Local<v8::Promise> ScriptPromise::rejectRaw(v8::Isolate* isolate, v8::Handle<v8::Value> value)
169 {
170     if (value.IsEmpty())
171         return v8::Local<v8::Promise>();
172     v8::Local<v8::Promise::Resolver> resolver = v8::Promise::Resolver::New(isolate);
173     v8::Local<v8::Promise> promise = resolver->GetPromise();
174     resolver->Reject(value);
175     return promise;
176 }
177
178 } // namespace blink