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| 1 /* | |
| 2 * Copyright (C) 2013 Google Inc. All rights reserved. | |
| 3 * | |
| 4 * Redistribution and use in source and binary forms, with or without | |
| 5 * modification, are permitted provided that the following conditions are | |
| 6 * met: | |
| 7 * | |
| 8 * * Redistributions of source code must retain the above copyright | |
| 9 * notice, this list of conditions and the following disclaimer. | |
| 10 * * Redistributions in binary form must reproduce the above | |
| 11 * copyright notice, this list of conditions and the following disclaimer | |
| 12 * in the documentation and/or other materials provided with the | |
| 13 * distribution. | |
| 14 * * Neither the name of Google Inc. nor the names of its | |
| 15 * contributors may be used to endorse or promote products derived from | |
| 16 * this software without specific prior written permission. | |
| 17 * | |
| 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 29 */ | |
| 30 | |
| 31 #ifndef ResourceLoadPriorityOptimizer_h | |
| 32 #define ResourceLoadPriorityOptimizer_h | |
| 33 | |
| 34 #include "core/fetch/ImageResource.h" | |
| 35 #include "core/fetch/ResourcePtr.h" | |
| 36 #include "platform/geometry/LayoutRect.h" | |
| 37 | |
| 38 #include "wtf/HashMap.h" | |
| 39 #include "wtf/HashSet.h" | |
| 40 #include "wtf/OwnPtr.h" | |
| 41 | |
| 42 namespace blink { | |
| 43 | |
| 44 class ResourceLoadPriorityOptimizer { | |
| 45 public: | |
| 46 enum VisibilityStatus { | |
| 47 NotVisible, | |
| 48 Visible, | |
| 49 }; | |
| 50 void notifyImageResourceVisibility(ImageResource*, VisibilityStatus, const L
ayoutRect&); | |
| 51 void updateAllImageResourcePriorities(); | |
| 52 void addLayoutObject(LayoutObject*); | |
| 53 void removeLayoutObject(LayoutObject*); | |
| 54 | |
| 55 static ResourceLoadPriorityOptimizer* resourceLoadPriorityOptimizer(); | |
| 56 | |
| 57 private: | |
| 58 ResourceLoadPriorityOptimizer(); | |
| 59 ~ResourceLoadPriorityOptimizer(); | |
| 60 | |
| 61 void updateImageResourcesWithLoadPriority(); | |
| 62 | |
| 63 struct ResourceAndVisibility { | |
| 64 ResourceAndVisibility(ImageResource*, VisibilityStatus, uint32_t); | |
| 65 ~ResourceAndVisibility(); | |
| 66 ResourcePtr<ImageResource> imageResource; | |
| 67 VisibilityStatus status; | |
| 68 int screenArea; | |
| 69 }; | |
| 70 | |
| 71 typedef HashMap<unsigned long, OwnPtr<ResourceAndVisibility>, WTF::IntHash<u
nsigned>, WTF::UnsignedWithZeroKeyHashTraits<unsigned>> ImageResourceMap; | |
| 72 ImageResourceMap m_imageResources; | |
| 73 | |
| 74 typedef HashSet<LayoutObject*> LayoutObjectSet; | |
| 75 LayoutObjectSet m_objects; | |
| 76 }; | |
| 77 | |
| 78 } | |
| 79 | |
| 80 #endif | |
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Chromium Code Reviews
Issue 1167583003:
Move Resource subclasses out of fetch/ (Closed)
Base URL: svn://svn.chromium.org/blink/trunk