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Side by Side Diff: Source/core/fetch/ResourceLoadPriorityOptimizer.cpp

Issue 1167583003: Move Resource subclasses out of fetch/ (Closed) Base URL: svn://svn.chromium.org/blink/trunk
Patch Set: Created 5 years, 6 months ago
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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 #include "config.h"
32 #include "core/fetch/ResourceLoadPriorityOptimizer.h"
33 #include "core/layout/LayoutObject.h"
34 #include "platform/TraceEvent.h"
35
36 #include "wtf/Vector.h"
37
38 namespace blink {
39
40 ResourceLoadPriorityOptimizer* ResourceLoadPriorityOptimizer::resourceLoadPriori tyOptimizer()
41 {
42 DEFINE_STATIC_LOCAL(ResourceLoadPriorityOptimizer, s_renderLoadOptimizer, () );
43 return &s_renderLoadOptimizer;
44 }
45
46 ResourceLoadPriorityOptimizer::ResourceAndVisibility::ResourceAndVisibility(Imag eResource* image, VisibilityStatus visibilityStatus, uint32_t screenArea)
47 : imageResource(image)
48 , status(visibilityStatus)
49 , screenArea(screenArea)
50 {
51 }
52
53 ResourceLoadPriorityOptimizer::ResourceAndVisibility::~ResourceAndVisibility()
54 {
55 }
56
57 ResourceLoadPriorityOptimizer::ResourceLoadPriorityOptimizer()
58 {
59 }
60
61 ResourceLoadPriorityOptimizer::~ResourceLoadPriorityOptimizer()
62 {
63 }
64
65 void ResourceLoadPriorityOptimizer::addLayoutObject(LayoutObject* layoutObject)
66 {
67 m_objects.add(layoutObject);
68 layoutObject->setHasPendingResourceUpdate(true);
69 }
70
71 void ResourceLoadPriorityOptimizer::removeLayoutObject(LayoutObject* layoutObjec t)
72 {
73 if (!layoutObject->hasPendingResourceUpdate())
74 return;
75 m_objects.remove(layoutObject);
76 layoutObject->setHasPendingResourceUpdate(false);
77 }
78
79 void ResourceLoadPriorityOptimizer::updateAllImageResourcePriorities()
80 {
81 TRACE_EVENT0("blink", "ResourceLoadPriorityOptimizer::updateAllImageResource Priorities");
82
83 m_imageResources.clear();
84
85 Vector<LayoutObject*> objectsToRemove;
86 for (const auto& layoutObject : m_objects) {
87 if (!layoutObject->updateImageLoadingPriorities())
88 objectsToRemove.append(layoutObject);
89 }
90 m_objects.removeAll(objectsToRemove);
91
92 updateImageResourcesWithLoadPriority();
93 }
94
95 void ResourceLoadPriorityOptimizer::updateImageResourcesWithLoadPriority()
96 {
97 for (const auto& resource : m_imageResources) {
98 ResourceLoadPriority priority = resource.value->status == Visible ?
99 ResourceLoadPriorityLow : ResourceLoadPriorityVeryLow;
100
101 if (priority != resource.value->imageResource->resourceRequest().priorit y()) {
102 resource.value->imageResource->mutableResourceRequest().setPriority( priority, resource.value->screenArea);
103 resource.value->imageResource->didChangePriority(priority, resource. value->screenArea);
104 }
105 }
106 m_imageResources.clear();
107 }
108
109 void ResourceLoadPriorityOptimizer::notifyImageResourceVisibility(ImageResource* img, VisibilityStatus status, const LayoutRect& screenRect)
110 {
111 if (!img || img->isLoaded())
112 return;
113
114 int screenArea = 0;
115 if (!screenRect.isEmpty() && status == Visible)
116 screenArea += static_cast<uint32_t>(screenRect.width() * screenRect.heig ht());
117
118 ImageResourceMap::AddResult result = m_imageResources.add(img->identifier(), adoptPtr(new ResourceAndVisibility(img, status, screenArea)));
119 if (!result.isNewEntry && status == Visible) {
120 result.storedValue->value->status = Visible;
121 result.storedValue->value->screenArea += screenArea;
122 }
123 }
124
125 }
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