| /* |
| * Copyright (C) 2013 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. |
| */ |
| |
| #include "core/loader/PrerenderHandle.h" |
| |
| #include "core/dom/Document.h" |
| #include "core/frame/LocalFrame.h" |
| #include "core/loader/FrameLoader.h" |
| #include "core/loader/PrerendererClient.h" |
| #include "platform/Prerender.h" |
| #include "platform/weborigin/ReferrerPolicy.h" |
| #include "platform/weborigin/SecurityPolicy.h" |
| |
| namespace blink { |
| |
| // static |
| PrerenderHandle* PrerenderHandle::create(Document& document, |
| PrerenderClient* client, |
| const KURL& url, |
| const unsigned prerenderRelTypes) { |
| // Prerenders are unlike requests in most ways (for instance, they pass down |
| // fragments, and they don't return data), but they do have referrers. |
| if (!document.frame()) |
| return nullptr; |
| |
| Prerender* prerender = Prerender::create( |
| client, url, prerenderRelTypes, |
| SecurityPolicy::generateReferrer(document.getReferrerPolicy(), url, |
| document.outgoingReferrer())); |
| |
| PrerendererClient* prerendererClient = |
| PrerendererClient::from(document.page()); |
| if (prerendererClient) |
| prerendererClient->willAddPrerender(prerender); |
| prerender->add(); |
| |
| return new PrerenderHandle(document, prerender); |
| } |
| |
| PrerenderHandle::PrerenderHandle(Document& document, Prerender* prerender) |
| : ContextLifecycleObserver(&document), m_prerender(prerender) {} |
| |
| PrerenderHandle::~PrerenderHandle() { |
| if (m_prerender) { |
| m_prerender->abandon(); |
| detach(); |
| } |
| } |
| |
| void PrerenderHandle::cancel() { |
| // Avoid both abandoning and canceling the same prerender. In the abandon |
| // case, the LinkLoader cancels the PrerenderHandle as the Document is |
| // destroyed, even through the ContextLifecycleObserver has already abandoned |
| // it. |
| if (!m_prerender) |
| return; |
| m_prerender->cancel(); |
| detach(); |
| } |
| |
| const KURL& PrerenderHandle::url() const { |
| return m_prerender->url(); |
| } |
| |
| void PrerenderHandle::contextDestroyed() { |
| // A PrerenderHandle is not removed from LifecycleNotifier::m_observers until |
| // the next GC runs. Thus contextDestroyed() can be called for a |
| // PrerenderHandle that is already cancelled (and thus detached). In that |
| // case, we should not detach the PrerenderHandle again. |
| if (!m_prerender) |
| return; |
| m_prerender->abandon(); |
| detach(); |
| } |
| |
| void PrerenderHandle::detach() { |
| m_prerender->dispose(); |
| m_prerender.clear(); |
| } |
| |
| DEFINE_TRACE(PrerenderHandle) { |
| visitor->trace(m_prerender); |
| ContextLifecycleObserver::trace(visitor); |
| } |
| |
| } // namespace blink |