| /* |
| * Copyright (C) 2010 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: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. 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. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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 PendingScript_h |
| #define PendingScript_h |
| |
| #include "base/macros.h" |
| #include "bindings/core/v8/ScriptStreamer.h" |
| #include "core/CoreExport.h" |
| #include "core/script/Script.h" |
| #include "core/script/ScriptElementBase.h" |
| #include "platform/bindings/ScriptWrappable.h" |
| #include "platform/heap/Handle.h" |
| #include "platform/weborigin/KURL.h" |
| #include "platform/wtf/text/TextPosition.h" |
| #include "public/platform/WebScopedVirtualTimePauser.h" |
| |
| namespace blink { |
| |
| class PendingScript; |
| |
| class CORE_EXPORT PendingScriptClient : public GarbageCollectedMixin { |
| public: |
| virtual ~PendingScriptClient() {} |
| |
| // Invoked when the pending script is ready. This could be during |
| // WatchForLoad() (if the pending script was already ready), or when the |
| // resource loads (if script streaming is not occurring), or when script |
| // streaming finishes. |
| virtual void PendingScriptFinished(PendingScript*) = 0; |
| |
| virtual void Trace(blink::Visitor* visitor) {} |
| }; |
| |
| // A container for an script after "prepare a script" until it is executed. |
| // ScriptLoader creates a PendingScript in ScriptLoader::PrepareScript(), and |
| // a Script is created via PendingScript::GetSource() when it becomes ready. |
| // When "script is ready" https://html.spec.whatwg.org/#the-script-is-ready, |
| // PendingScriptClient is notified. |
| class CORE_EXPORT PendingScript |
| : public GarbageCollectedFinalized<PendingScript>, |
| public TraceWrapperBase { |
| public: |
| virtual ~PendingScript(); |
| |
| TextPosition StartingPosition() const { return starting_position_; } |
| void MarkParserBlockingLoadStartTime(); |
| // Returns the time the load of this script started blocking the parser, or |
| // zero if this script hasn't yet blocked the parser, in |
| // monotonicallyIncreasingTime. |
| double ParserBlockingLoadStartTime() const { |
| return parser_blocking_load_start_time_; |
| } |
| |
| void WatchForLoad(PendingScriptClient*); |
| void StopWatchingForLoad(); |
| |
| ScriptElementBase* GetElement() const; |
| |
| virtual ScriptType GetScriptType() const = 0; |
| |
| virtual void Trace(blink::Visitor*); |
| void TraceWrappers(const ScriptWrappableVisitor*) const override {} |
| |
| // Returns false if the script should not be run due to MIME type check. |
| // Should be called just before GetSource(). |
| virtual bool CheckMIMETypeBeforeRunScript( |
| Document* context_document) const = 0; |
| |
| virtual Script* GetSource(const KURL& document_url, |
| bool& error_occurred) const = 0; |
| |
| // https://html.spec.whatwg.org/#the-script-is-ready |
| virtual bool IsReady() const = 0; |
| virtual bool IsExternal() const = 0; |
| virtual bool ErrorOccurred() const = 0; |
| virtual bool WasCanceled() const = 0; |
| |
| // Support for script streaming. |
| virtual bool StartStreamingIfPossible(ScriptStreamer::Type, |
| base::OnceClosure) = 0; |
| virtual bool IsCurrentlyStreaming() const = 0; |
| |
| // Used only for tracing, and can return a null URL. |
| // TODO(hiroshige): It's preferable to return the base URL consistently |
| // https://html.spec.whatwg.org/#concept-script-base-url |
| // but it requires further refactoring. |
| virtual KURL UrlForTracing() const = 0; |
| |
| // Used for DCHECK()s. |
| bool IsExternalOrModule() const { |
| return IsExternal() || GetScriptType() == ScriptType::kModule; |
| } |
| |
| void Dispose(); |
| |
| protected: |
| PendingScript(ScriptElementBase*, const TextPosition& starting_position); |
| |
| virtual void DisposeInternal() = 0; |
| |
| PendingScriptClient* Client() { return client_; } |
| bool IsWatchingForLoad() const { return client_; } |
| |
| virtual void CheckState() const = 0; |
| |
| private: |
| // |m_element| must points to the corresponding ScriptLoader's |
| // ScriptElementBase and thus must be non-null before dispose() is called |
| // (except for unit tests). |
| Member<ScriptElementBase> element_; |
| |
| TextPosition starting_position_; // Only used for inline script tags. |
| double parser_blocking_load_start_time_; |
| |
| WebScopedVirtualTimePauser virtual_time_pauser_; |
| Member<PendingScriptClient> client_; |
| DISALLOW_COPY_AND_ASSIGN(PendingScript); |
| }; |
| |
| } // namespace blink |
| |
| #endif // PendingScript_h |