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31 #ifndef HTMLImportChild_h
32 #define HTMLImportChild_h
34 #include "core/fetch/RawResource.h"
35 #include "core/fetch/ResourceOwner.h"
36 #include "core/html/imports/HTMLImport.h"
37 #include "platform/heap/Handle.h"
38 #include "platform/weborigin/KURL.h"
39 #include "wtf/Vector.h"
40 #include "wtf/WeakPtr.h"
44 class CustomElementMicrotaskImportStep;
45 class HTMLImportLoader;
46 class HTMLImportChildClient;
47 class HTMLLinkElement;
50 // An import tree node subclas to encapsulate imported document
51 // lifecycle. This class is owned by LinkStyle. The actual loading
52 // is done by HTMLImportLoader, which can be shared among multiple
53 // HTMLImportChild of same link URL.
55 // HTMLImportChild implements ResourceClient through ResourceOwner
56 // so that it can speculatively request linked resources while it is unblocked.
58 class HTMLImportChild FINAL : public HTMLImport, public ResourceOwner<RawResource> {
60 HTMLImportChild(Document&, const KURL&, SyncMode);
61 virtual ~HTMLImportChild();
63 HTMLLinkElement* link() const;
64 Document* importedDocument() const;
65 const KURL& url() const { return m_url; }
67 void wasAlreadyLoaded();
68 void startLoading(const ResourcePtr<RawResource>&);
69 void importDestroyed();
70 WeakPtr<HTMLImportChild> weakPtr() { return m_weakFactory.createWeakPtr(); }
73 virtual bool isChild() const OVERRIDE { return true; }
74 virtual Document* document() const OVERRIDE;
75 virtual bool isDone() const OVERRIDE;
76 virtual HTMLImportLoader* loader() const OVERRIDE { return m_loader; }
77 virtual void stateWillChange() OVERRIDE;
78 virtual void stateDidChange() OVERRIDE;
81 virtual void showThis() OVERRIDE;
84 void setClient(HTMLImportChildClient*);
86 bool loaderHasError() const;
88 void didFinishLoading();
89 void didFinishUpgradingCustomElements();
90 bool isLoaded() const;
94 // RawResourceOwner doing nothing.
95 // HTMLImportChild owns the resource so that the contents of prefetched Resource doesn't go away.
96 virtual void responseReceived(Resource*, const ResourceResponse&) OVERRIDE { }
97 virtual void dataReceived(Resource*, const char*, int) OVERRIDE { }
98 virtual void notifyFinished(Resource*) OVERRIDE { }
102 void shareLoader(HTMLImportChild*);
106 Persistent<Document> m_master;
111 WeakPtrFactory<HTMLImportChild> m_weakFactory;
112 WeakPtr<CustomElementMicrotaskImportStep> m_customElementMicrotaskStep;
113 HTMLImportLoader* m_loader;
114 HTMLImportChildClient* m_client;
117 inline HTMLImportChild* toHTMLImportChild(HTMLImport* import)
119 ASSERT(!import || import->isChild());
120 return static_cast<HTMLImportChild*>(import);
123 } // namespace WebCore
125 #endif // HTMLImportChild_h