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| 1 /* | |
| 2 * Copyright (C) 2012 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 | |
| 6 * are met: | |
| 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. | |
| 12 * | |
| 13 * THIS SOFTWARE IS PROVIDED BY GOOGLE 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 COMPUTER, 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. | |
| 24 */ | |
| 25 | |
| 26 #include "config.h" | |
| 27 #include "FeatureObserver.h" | |
| 28 | |
| 29 #include "DOMWindow.h" | |
| 30 #include "Document.h" | |
| 31 #include "HistogramSupport.h" | |
| 32 #include "Page.h" | |
| 33 | |
| 34 namespace WebCore { | |
| 35 | |
| 36 FeatureObserver::FeatureObserver() | |
| 37 { | |
| 38 } | |
| 39 | |
| 40 FeatureObserver::~FeatureObserver() | |
| 41 { | |
| 42 // We always log PageDestruction so that we have a scale for the rest of the
features. | |
| 43 HistogramSupport::histogramEnumeration("WebCore.FeatureObserver", PageDestru
ction, NumberOfFeatures); | |
| 44 | |
| 45 updateMeasurements(); | |
| 46 } | |
| 47 | |
| 48 void FeatureObserver::updateMeasurements() | |
| 49 { | |
| 50 HistogramSupport::histogramEnumeration("WebCore.FeatureObserver", PageVisits
, NumberOfFeatures); | |
| 51 | |
| 52 if (!m_featureBits) | |
| 53 return; | |
| 54 | |
| 55 for (unsigned i = 0; i < NumberOfFeatures; ++i) { | |
| 56 if (m_featureBits->quickGet(i)) | |
| 57 HistogramSupport::histogramEnumeration("WebCore.FeatureObserver", i,
NumberOfFeatures); | |
| 58 } | |
| 59 | |
| 60 // Clearing feature bits is timing sensitive. Ports other than chromium do n
ot use HistogramSupport, | |
| 61 // and pull the results on certain navigation events instead. | |
| 62 m_featureBits->clearAll(); | |
| 63 } | |
| 64 | |
| 65 void FeatureObserver::didCommitLoad() | |
| 66 { | |
| 67 updateMeasurements(); | |
| 68 } | |
| 69 | |
| 70 void FeatureObserver::observe(Document* document, Feature feature) | |
| 71 { | |
| 72 if (!document) | |
| 73 return; | |
| 74 | |
| 75 Page* page = document->page(); | |
| 76 if (!page) | |
| 77 return; | |
| 78 | |
| 79 page->featureObserver()->didObserve(feature); | |
| 80 } | |
| 81 | |
| 82 void FeatureObserver::observe(DOMWindow* domWindow, Feature feature) | |
| 83 { | |
| 84 ASSERT(domWindow); | |
| 85 observe(domWindow->document(), feature); | |
| 86 } | |
| 87 | |
| 88 } // namespace WebCore | |
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Chromium Code Reviews
Issue 14301003:
Rename FeatureObserver to UseCounter to make clear that all it stores are usage counts. (Closed)
Base URL: svn://svn.chromium.org/blink/trunk