Added Dartium changes onto 45.0.2454.104

Source/bindings/core/dart/DartApplicationLoader.h

+// Copyright 2011, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#ifndef DartApplicationLoader_h
+#define DartApplicationLoader_h
+
+#include "bindings/core/v8/ScriptSourceCode.h"
+#include "core/dom/Document.h"
+#include "core/html/HTMLScriptElement.h"
+#include "core/html/VoidCallback.h"
+#include <dart_api.h>
+#include <wtf/HashMap.h>
+#include <wtf/HashSet.h>
+#include <wtf/text/StringHash.h>
+
+namespace blink {
+
+class FetchRequest;
+class KURL;
+class ScriptLoader;
+class ScriptLoaderClient;
+class ScriptResource;
+
+class DartErrorEventDispatcher : public RefCounted<DartErrorEventDispatcher> {
+public:
+    virtual ~DartErrorEventDispatcher() { }
+    virtual void dispatchErrorEvent() = 0;
+};
+
+// FIXME(vsm): We should be able to eliminate this class and reuse v8/ScriptSourceCode.
+// Abstraction for HTMLScriptElement or SVGScriptElement.
+class DartScriptInfo : public DartErrorEventDispatcher {
+public:
+    static PassRefPtr<DartScriptInfo> create(PassRefPtr<Element> scriptElement);
+
+    String sourceAttributeValue() const;
+    String typeAttributeValue() const;
+    String scriptContent();
+    void dispatchErrorEvent();
+    WTF::OrdinalNumber startLineNumber();
+    ScriptLoader* loader();
+    Document* ownerDocument();
+    String url();
+
+    virtual ~DartScriptInfo() { }
+
+protected:
+    DartScriptInfo(PassRefPtr<Element>);
+
+    // Note, the element keeps the corresponding ScriptLoader and ScriptLoaderClient alive.
+    RefPtr<Element> m_element;
+    ScriptLoader* m_loader;
+    ScriptLoaderClient* m_client;
+};
+
+class DartApplicationLoader : public RefCounted<DartApplicationLoader> {
+public:
+    class Callback : public RefCounted<Callback> {
+    public:
+        Callback(Document* originDocument, PassRefPtr<DartScriptInfo> scriptInfo = nullptr)
+            : m_originDocument(originDocument)
+            , m_scriptInfo(scriptInfo) { }
+
+        virtual ~Callback() { }
+
+        virtual void ready() = 0;
+        void reportError(const String& error, const String& url);
+
+        KURL completeURL(const String& url) { return document()->completeURL(url); }
+        ResourcePtr<ScriptResource> requestScript(FetchRequest&);
+
+        Document* document();
+        Document* originDocument() const { return m_originDocument; }
+        PassRefPtr<DartScriptInfo> scriptInfo() const { return m_scriptInfo; }
+
+    private:
+        Document* m_originDocument;
+        RefPtr<DartScriptInfo> m_scriptInfo;
+    };
+
+    static PassRefPtr<DartApplicationLoader> create(Document* document, bool domEnabled)
+    {
+        return adoptRef(new DartApplicationLoader(document, domEnabled));
+    }
+
+    void load(PassRefPtr<DartErrorEventDispatcher>);
+
+    Document* document() { return m_originDocument; }
+
+    void callEntryPoint();
+
+    void logObservatoryInformation();
+
+    void validateUrlLoaded(const String& url);
+
+    // Registers a request to be fetched later.
+    void addRequest(PassRefPtr<DartScriptInfo>);
+
+    // Fetches all pending requests and invokes callback when done.
+    void processRequests(Dart_Isolate, const ScriptSourceCode&, PassRefPtr<Callback>);
+    void processSingleRequest(Dart_Isolate, const String& url, PassRefPtr<Callback>);
+
+    bool running() const { return m_state >= Running; }
+    bool error() const { return m_state == Error; }
+    bool uninitialized() const { return m_state == Uninitialized; }
+
+    const KURL& scriptUrl() { return m_scriptUrl; }
+private:
+    enum State {
+        // The application failed to load.
+        Error = -1,
+
+        // The isolate is not set.
+        Uninitialized = 0,
+
+        // The isolate is initialized, but no user scripts have been requested or loaded.
+        Initialized,
+
+        // The isolate is not running. The main script has been requested, but not loaded.
+        Fetching,
+
+        // The isolate is not running as requests are in the process of loading.
+        Loading,
+
+        // The isolate is not running, but is ready to run. There are no outstanding requests.
+        Ready,
+
+        // The isolate is running. There no outstanding requests or deferred libraries.
+        Running,
+
+        // The isolate is running, but deferred requests are outstanding.
+        DeferredLoading,
+
+        // The isolate is running, but there are deferred requests ready to finalize.
+        DeferredReady,
+    };
+
+    enum SnapshotMode {
+        // Snapshots are disabled.
+        SnapshotOff,
+
+        // Snapshot only single resource cacheable apps.
+        SnapshotSingle,
+
+        // Snapshot everything (experimental).
+        SnapshotAll,
+    };
+
+    typedef HashSet<String> UrlSet;
+    typedef Vector<Dart_PersistentHandle> HandleSet;
+    typedef HashMap<String, HandleSet*> UrlHandleMap;
+    typedef Deque<RefPtr<DartScriptInfo> > ScriptList;
+
+    DartApplicationLoader(Document*, bool domEnabled = true);
+
+    void loadScriptFromSnapshot(const String& url, const uint8_t* snapshot, intptr_t snapshotSize);
+
+    Dart_Handle topLevelLibrary();
+
+    // FIXME(vsm): Do we need all of these?
+    void scriptLoadError(String failedUrl);
+    void reportDartError(Dart_Handle);
+    void reportError(Dart_Handle error, const String& url);
+    void reportError(const String& error, const String& url);
+
+    void initialize(Dart_Isolate, const String& scriptUrl, PassRefPtr<Callback>);
+
+    void process(const String& url, const String& source, intptr_t lineNumber);
+    void fetchScriptResource(const String& url);
+
+    // All dependences are available.
+    bool ready() const { return m_pendingLibraries.isEmpty() && m_pendingSource.isEmpty() && m_htmlImportedScripts.isEmpty() && (m_state >= Loading); }
+
+    void findDependences(const String& url, const String& source, intptr_t lineNumber);
+    void processLibrary(const String& url, const String& source, intptr_t lineNumber);
+    void processSource(const String& url, const String& source, intptr_t lineNumber);
+    static Dart_Handle libraryTagHandlerCallback(Dart_LibraryTag, Dart_Handle library, Dart_Handle urlHandle);
+
+    Dart_Isolate m_isolate;
+    // Client must ensure that DartApplicationLoader doesn't outlive corresponding document.
+    Document* m_originDocument;
+    RefPtr<DartErrorEventDispatcher> m_errorEventDispatcher;
+    RefPtr<Callback> m_loadCallback;
+    bool m_domEnabled;
+    bool m_cacheable;
+
+    ScriptList m_htmlImportedScripts;
+    UrlSet m_pendingLibraries;
+    UrlHandleMap m_pendingSource;
+
+    KURL m_scriptUrl;
+    String m_scriptUrlString;
+    String m_packageRoot;
+
+    State m_state;
+    SnapshotMode m_snapshotMode;
+
+    friend class DartService;
+    friend class ScriptLoadedCallback;
+};
+
+}
+
+#endif // DartApplicationLoader_h