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1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 
5 #include "config.h"
6 #include "modules/serviceworkers/WaitUntilObserver.h"
7 
8 #include "bindings/v8/ScriptFunction.h"
9 #include "bindings/v8/ScriptPromise.h"
10 #include "bindings/v8/ScriptValue.h"
11 #include "bindings/v8/V8Binding.h"
12 #include "core/dom/ExecutionContext.h"
13 #include "platform/NotImplemented.h"
14 #include "public/platform/WebServiceWorkerEventResult.h"
15 #include "wtf/Assertions.h"
16 #include "wtf/RefCounted.h"
17 #include "wtf/RefPtr.h"
18 #include <v8.h>
19 
20 namespace WebCore {
21 
22 class WaitUntilObserver::ThenFunction FINAL : public ScriptFunction {
23 public:
24     enum ResolveType {
25         Fulfilled,
26         Rejected,
27     };
28 
create(PassRefPtr<WaitUntilObserver> observer,ResolveType type)29     static PassOwnPtr<ScriptFunction> create(PassRefPtr<WaitUntilObserver> observer, ResolveType type)
30     {
31         ExecutionContext* executionContext = observer->executionContext();
32         return adoptPtr(new ThenFunction(toIsolate(executionContext), observer, type));
33     }
34 
35 private:
ThenFunction(v8::Isolate * isolate,PassRefPtr<WaitUntilObserver> observer,ResolveType type)36     ThenFunction(v8::Isolate* isolate, PassRefPtr<WaitUntilObserver> observer, ResolveType type)
37         : ScriptFunction(isolate)
38         , m_observer(observer)
39         , m_resolveType(type)
40     {
41     }
42 
call(ScriptValue value)43     virtual ScriptValue call(ScriptValue value) OVERRIDE
44     {
45         ASSERT(m_observer);
46         ASSERT(m_resolveType == Fulfilled || m_resolveType == Rejected);
47         if (m_resolveType == Rejected)
48             m_observer->reportError(value);
49         m_observer->decrementPendingActivity();
50         m_observer = nullptr;
51         return value;
52     }
53 
54     RefPtr<WaitUntilObserver> m_observer;
55     ResolveType m_resolveType;
56 };
57 
create(ExecutionContext * context,EventType type,int eventID)58 PassRefPtr<WaitUntilObserver> WaitUntilObserver::create(ExecutionContext* context, EventType type, int eventID)
59 {
60     return adoptRef(new WaitUntilObserver(context, type, eventID));
61 }
62 
~WaitUntilObserver()63 WaitUntilObserver::~WaitUntilObserver()
64 {
65     ASSERT(!m_pendingActivity);
66 }
67 
willDispatchEvent()68 void WaitUntilObserver::willDispatchEvent()
69 {
70     incrementPendingActivity();
71 }
72 
didDispatchEvent()73 void WaitUntilObserver::didDispatchEvent()
74 {
75     decrementPendingActivity();
76 }
77 
waitUntil(ScriptState * scriptState,const ScriptValue & value)78 void WaitUntilObserver::waitUntil(ScriptState* scriptState, const ScriptValue& value)
79 {
80     incrementPendingActivity();
81     ScriptPromise::cast(scriptState, value).then(
82         ThenFunction::create(this, ThenFunction::Fulfilled),
83         ThenFunction::create(this, ThenFunction::Rejected));
84 }
85 
WaitUntilObserver(ExecutionContext * context,EventType type,int eventID)86 WaitUntilObserver::WaitUntilObserver(ExecutionContext* context, EventType type, int eventID)
87     : ContextLifecycleObserver(context)
88     , m_type(type)
89     , m_eventID(eventID)
90     , m_pendingActivity(0)
91     , m_hasError(false)
92 {
93 }
94 
reportError(const ScriptValue & value)95 void WaitUntilObserver::reportError(const ScriptValue& value)
96 {
97     // FIXME: Propagate error message to the client for onerror handling.
98     notImplemented();
99 
100     m_hasError = true;
101 }
102 
incrementPendingActivity()103 void WaitUntilObserver::incrementPendingActivity()
104 {
105     ++m_pendingActivity;
106 }
107 
decrementPendingActivity()108 void WaitUntilObserver::decrementPendingActivity()
109 {
110     ASSERT(m_pendingActivity > 0);
111     if (--m_pendingActivity || !executionContext())
112         return;
113 
114     ServiceWorkerGlobalScopeClient* client = ServiceWorkerGlobalScopeClient::from(executionContext());
115     blink::WebServiceWorkerEventResult result = m_hasError ? blink::WebServiceWorkerEventResultRejected : blink::WebServiceWorkerEventResultCompleted;
116     switch (m_type) {
117     case Activate:
118         client->didHandleActivateEvent(m_eventID, result);
119         break;
120     case Install:
121         client->didHandleInstallEvent(m_eventID, result);
122         break;
123     }
124     observeContext(0);
125 }
126 
127 } // namespace WebCore
128