| /* |
| * 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. |
| */ |
| |
| #include "core/script/PendingScript.h" |
| |
| #include "core/dom/Document.h" |
| #include "core/frame/LocalFrame.h" |
| #include "core/script/ScriptElementBase.h" |
| #include "platform/WebFrameScheduler.h" |
| #include "platform/wtf/Time.h" |
| |
| namespace blink { |
| |
| namespace { |
| WebScopedVirtualTimePauser CreateWebScopedVirtualTimePauser( |
| ScriptElementBase* element) { |
| if (!element || !element->GetDocument().GetFrame()) |
| return WebScopedVirtualTimePauser(); |
| return element->GetDocument() |
| .GetFrame() |
| ->FrameScheduler() |
| ->CreateWebScopedVirtualTimePauser(); |
| } |
| } // namespace |
| |
| PendingScript::PendingScript(ScriptElementBase* element, |
| const TextPosition& starting_position) |
| : element_(element), |
| starting_position_(starting_position), |
| parser_blocking_load_start_time_(0), |
| virtual_time_pauser_(CreateWebScopedVirtualTimePauser(element)), |
| client_(nullptr) {} |
| |
| PendingScript::~PendingScript() {} |
| |
| void PendingScript::Dispose() { |
| StopWatchingForLoad(); |
| DCHECK(!Client()); |
| DCHECK(!IsWatchingForLoad()); |
| |
| starting_position_ = TextPosition::BelowRangePosition(); |
| parser_blocking_load_start_time_ = 0; |
| |
| DisposeInternal(); |
| element_ = nullptr; |
| } |
| |
| void PendingScript::WatchForLoad(PendingScriptClient* client) { |
| CheckState(); |
| |
| DCHECK(!IsWatchingForLoad()); |
| DCHECK(client); |
| // addClient() will call streamingFinished() if the load is complete. Callers |
| // who do not expect to be re-entered from this call should not call |
| // watchForLoad for a PendingScript which isReady. We also need to set |
| // m_watchingForLoad early, since addClient() can result in calling |
| // notifyFinished and further stopWatchingForLoad(). |
| client_ = client; |
| if (IsReady()) { |
| client_->PendingScriptFinished(this); |
| } else { |
| virtual_time_pauser_.PauseVirtualTime(true); |
| } |
| } |
| |
| void PendingScript::StopWatchingForLoad() { |
| if (!IsWatchingForLoad()) |
| return; |
| CheckState(); |
| DCHECK(IsExternalOrModule()); |
| client_ = nullptr; |
| virtual_time_pauser_.PauseVirtualTime(false); |
| } |
| |
| ScriptElementBase* PendingScript::GetElement() const { |
| // As mentioned in the comment at |m_element| declaration, |
| // |m_element| must point to the corresponding ScriptLoader's |
| // client. |
| CHECK(element_); |
| return element_.Get(); |
| } |
| |
| void PendingScript::MarkParserBlockingLoadStartTime() { |
| DCHECK_EQ(parser_blocking_load_start_time_, 0.0); |
| parser_blocking_load_start_time_ = CurrentTimeTicksInSeconds(); |
| } |
| |
| void PendingScript::Trace(blink::Visitor* visitor) { |
| visitor->Trace(element_); |
| visitor->Trace(client_); |
| } |
| |
| } // namespace blink |