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1 // Copyright 2017 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 #ifndef ModuleTreeLinker_h | |
6 #define ModuleTreeLinker_h | |
7 | |
8 #include "core/dom/Modulator.h" | |
9 #include "wtf/HashSet.h" | |
10 | |
11 namespace blink { | |
12 | |
13 class ModuleTreeLinkerRegistry; | |
14 | |
15 // A ModuleTreeLinker is esponsible for running and keeping intermediate states | |
yhirano
2017/01/06 07:27:01
responsible
kouhei (in TOK)
2017/01/11 01:41:58
Done.
| |
16 // for "internal module script graph fetching procedure" for a module graph tree | |
17 // node. | |
18 // https://html.spec.whatwg.org/multipage/webappapis.html#internal-module-script -graph-fetching-procedure | |
19 class ModuleTreeLinker final | |
20 : public GarbageCollectedFinalized<ModuleTreeLinker>, | |
21 public SingleModuleClient { | |
22 USING_GARBAGE_COLLECTED_MIXIN(ModuleTreeLinker); | |
23 | |
24 public: | |
25 static ModuleTreeLinker* fetch(const KURL&, | |
26 const KURL& baseURL, | |
27 Modulator*, | |
28 ModuleTreeLinkerRegistry*, | |
29 ModuleTreeClient*); | |
30 virtual ~ModuleTreeLinker() = default; | |
31 DECLARE_TRACE(); | |
32 | |
33 bool isFetching() const { | |
34 return State::FetchingSelf <= m_state && m_state < State::Finished; | |
35 } | |
36 bool hasFinished() const { return m_state == State::Finished; } | |
37 | |
38 private: | |
39 ModuleTreeLinker(Modulator*, ModuleTreeLinkerRegistry*, ModuleTreeClient*); | |
40 | |
41 enum class State { | |
42 Initial, | |
43 // Running fetch of the module script corresponding to the target node. | |
44 FetchingSelf, | |
45 // Running fetch of descendants of the target node. | |
46 FetchingDependencies, | |
47 // Instantiating m_moduleScript and the node descendants. | |
48 Instantiating, | |
yhirano
2017/01/06 07:27:01
Not used
kouhei (in TOK)
2017/01/11 01:41:58
Fixed.
| |
49 Finished, | |
50 }; | |
51 void advanceState(State); | |
52 | |
53 void fetchSelf(const KURL&, const KURL& baseURL); | |
54 // Implements SingleModuleClient | |
55 void notifyFinishedSingleModule(ModuleScript*) override; | |
56 | |
57 void fetchDescendants(); | |
58 void notifyOneDescendantFinished(bool wasSuccess); | |
59 | |
60 void instantiate(); | |
61 HeapHashSet<Member<ModuleScript>> uninstantiatedInclusiveDescendants(); | |
62 | |
63 class DependencyModuleClient; | |
64 friend class DependencyModuleClient; | |
65 | |
66 Member<Modulator> m_modulator; | |
67 Member<ModuleTreeLinkerRegistry> m_registry; | |
68 Member<ModuleTreeClient> m_client; | |
69 State m_state = State::Initial; | |
70 Member<ModuleScript> m_moduleScript; | |
71 size_t m_numIncompleteDescendants = 0; | |
72 HeapHashSet<Member<DependencyModuleClient>> m_dependencyClients; | |
73 }; | |
74 | |
75 } // namespace blink | |
76 | |
77 #endif | |
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