2 * Copyright (C) 2013 Google Inc. All Rights Reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 #include "HTMLResourcePreloader.h"
29 #include "CachedResourceLoader.h"
32 #include "MediaList.h"
33 #include "MediaQueryEvaluator.h"
34 #include "RenderView.h"
38 URL PreloadRequest::completeURL(Document& document)
40 return document.completeURL(m_resourceURL, m_baseURL.isEmpty() ? document.baseURL() : m_baseURL);
43 CachedResourceRequest PreloadRequest::resourceRequest(Document& document)
45 ASSERT(isMainThread());
46 CachedResourceRequest request(ResourceRequest(completeURL(document)));
47 request.setInitiator(m_initiator);
48 request.setAsPotentiallyCrossOrigin(m_crossOriginMode, document);
52 void HTMLResourcePreloader::preload(PreloadRequestStream requests)
54 for (auto& request : requests)
55 preload(WTFMove(request));
58 static bool mediaAttributeMatches(Document& document, const RenderStyle* renderStyle, const String& attributeValue)
60 auto mediaQueries = MediaQuerySet::createAllowingDescriptionSyntax(attributeValue);
61 return MediaQueryEvaluator { "screen", document, renderStyle }.evaluate(mediaQueries.get());
64 void HTMLResourcePreloader::preload(std::unique_ptr<PreloadRequest> preload)
66 ASSERT(m_document.frame());
67 ASSERT(m_document.renderView());
68 if (!preload->media().isEmpty() && !mediaAttributeMatches(m_document, &m_document.renderView()->style(), preload->media()))
71 m_document.cachedResourceLoader().preload(preload->resourceType(), preload->resourceRequest(m_document), CachedResourceLoader::ImplicitPreload);