| /* |
| * Copyright (C) 2012 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: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. 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. |
| * |
| * THIS SOFTWARE IS PROVIDED BY GOOGLE INC. ``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 APPLE COMPUTER, INC. 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. |
| */ |
| |
| #ifndef UseCounter_h |
| #define UseCounter_h |
| |
| #include "CSSPropertyNames.h" |
| #include "wtf/BitVector.h" |
| #include "wtf/Noncopyable.h" |
| #include "wtf/OwnPtr.h" |
| #include "wtf/PassOwnPtr.h" |
| #include "wtf/text/WTFString.h" |
| |
| namespace WebCore { |
| |
| class CSSStyleSheet; |
| class DOMWindow; |
| class Document; |
| class ScriptExecutionContext; |
| class StyleSheetContents; |
| |
| // UseCounter is used for counting the number of times features of |
| // Blink are used on real web pages and help us know commonly |
| // features are used and thus when it's safe to remove or change them. |
| // |
| // The Chromium Content layer controls what is done with this data. |
| // For instance, in Google Chrome, these counts are submitted |
| // anonymously through the Histogram recording system in Chrome |
| // for users who opt-in to "Usage Statistics" submission |
| // during their install of Google Chrome: |
| // http://www.google.com/chrome/intl/en/privacy.html |
| |
| class UseCounter { |
| WTF_MAKE_NONCOPYABLE(UseCounter); |
| public: |
| UseCounter(); |
| ~UseCounter(); |
| |
| enum Feature { |
| PageDestruction, |
| LegacyNotifications, |
| MultipartMainResource, |
| PrefixedIndexedDB, |
| WorkerStart, |
| SharedWorkerStart, |
| LegacyWebAudio, |
| WebAudioStart, |
| PrefixedContentSecurityPolicy, |
| UnprefixedIndexedDB, |
| OpenWebDatabase, |
| UnusedSlot01, // Prior to 7/2013, we used this slot for LegacyHTMLNotifications. |
| LegacyTextNotifications, |
| UnprefixedRequestAnimationFrame, |
| PrefixedRequestAnimationFrame, |
| ContentSecurityPolicy, |
| ContentSecurityPolicyReportOnly, |
| PrefixedContentSecurityPolicyReportOnly, |
| PrefixedTransitionEndEvent, |
| UnprefixedTransitionEndEvent, |
| PrefixedAndUnprefixedTransitionEndEvent, |
| AutoFocusAttribute, |
| UnusedSlot02, // Prior to 4/2013, we used this slot for AutoSaveAttribute. |
| DataListElement, |
| FormAttribute, |
| IncrementalAttribute, |
| InputTypeColor, |
| InputTypeDate, |
| InputTypeDateTime, |
| InputTypeDateTimeFallback, |
| InputTypeDateTimeLocal, |
| InputTypeEmail, |
| InputTypeMonth, |
| InputTypeNumber, |
| InputTypeRange, |
| InputTypeSearch, |
| InputTypeTel, |
| InputTypeTime, |
| InputTypeURL, |
| InputTypeWeek, |
| InputTypeWeekFallback, |
| ListAttribute, |
| MaxAttribute, |
| MinAttribute, |
| PatternAttribute, |
| PlaceholderAttribute, |
| PrecisionAttribute, |
| PrefixedDirectoryAttribute, |
| PrefixedSpeechAttribute, |
| RequiredAttribute, |
| ResultsAttribute, |
| StepAttribute, |
| PageVisits, |
| HTMLMarqueeElement, |
| UnusedSlot03, // Removed, was tracking overflow: -webkit-marquee. |
| Reflection, |
| CursorVisibility, // Removed, was -webkit-cursor-visibility. |
| StorageInfo, |
| XFrameOptions, |
| XFrameOptionsSameOrigin, |
| XFrameOptionsSameOriginWithBadAncestorChain, |
| DeprecatedFlexboxWebContent, |
| DeprecatedFlexboxChrome, |
| DeprecatedFlexboxChromeExtension, |
| UnusedSlot04, |
| UnprefixedPerformanceTimeline, |
| PrefixedPerformanceTimeline, |
| UnprefixedUserTiming, |
| PrefixedUserTiming, |
| WindowEvent, |
| ContentSecurityPolicyWithBaseElement, |
| PrefixedMediaAddKey, |
| PrefixedMediaGenerateKeyRequest, |
| WebAudioLooping, |
| DocumentClear, |
| PrefixedTransitionMediaFeature, |
| SVGFontElement, |
| XMLDocument, |
| XSLProcessingInstruction, |
| XSLTProcessor, |
| SVGSwitchElement, |
| PrefixedDocumentRegister, |
| HTMLShadowElementOlderShadowRoot, |
| DocumentAll, |
| FormElement, |
| DemotedFormElement, |
| CaptureAttributeAsEnum, |
| ShadowDOMPrefixedPseudo, |
| ShadowDOMPrefixedCreateShadowRoot, |
| ShadowDOMPrefixedShadowRoot, |
| SVGAnimationElement, |
| KeyboardEventKeyLocation, |
| CaptureEvents, |
| ReleaseEvents, |
| CSSDisplayRunIn, |
| CSSDisplayCompact, |
| LineClamp, |
| SubFrameBeforeUnloadRegistered, |
| SubFrameBeforeUnloadFired, |
| CSSPseudoElementPrefixedDistributed, |
| TextReplaceWholeText, |
| PrefixedShadowRootConstructor, |
| ConsoleMarkTimeline, |
| CSSPseudoElementUserAgentCustomPseudo, |
| DocumentTypeEntities, // Removed from DOM4. |
| DocumentTypeInternalSubset, // Removed from DOM4. |
| DocumentTypeNotations, // Removed from DOM4. |
| ElementGetAttributeNode, // Removed from DOM4. |
| ElementSetAttributeNode, // Removed from DOM4. |
| ElementRemoveAttributeNode, // Removed from DOM4. |
| ElementGetAttributeNodeNS, // Removed from DOM4. |
| DocumentCreateAttribute, // Removed from DOM4. |
| DocumentCreateAttributeNS, // Removed from DOM4. |
| DocumentCreateCDATASection, // Removed from DOM4. |
| DocumentInputEncoding, // Removed from DOM4. |
| DocumentXMLEncoding, // Removed from DOM4. |
| DocumentXMLStandalone, // Removed from DOM4. |
| DocumentXMLVersion, // Removed from DOM4. |
| NodeIsSameNode, // Removed from DOM4. |
| NodeIsSupported, // Removed from DOM4. |
| NodeNamespaceURI, // Removed from DOM4. |
| NodePrefix, // Removed from DOM4. |
| NodeLocalName, // Removed from DOM4. |
| NavigatorProductSub, |
| NavigatorVendor, |
| NavigatorVendorSub, |
| FileError, |
| DocumentCharset, // Documented as IE extensions, from KHTML days. |
| PrefixedAnimationEndEvent, |
| UnprefixedAnimationEndEvent, |
| PrefixedAndUnprefixedAnimationEndEvent, |
| PrefixedAnimationStartEvent, |
| UnprefixedAnimationStartEvent, |
| PrefixedAndUnprefixedAnimationStartEvent, |
| PrefixedAnimationIterationEvent, |
| UnprefixedAnimationIterationEvent, |
| PrefixedAndUnprefixedAnimationIterationEvent, |
| EventReturnValue, // Legacy IE extension. |
| SVGSVGElement, |
| SVGAnimateColorElement, |
| InsertAdjacentText, |
| InsertAdjacentElement, |
| HasAttributes, // Removed from DOM4. |
| DOMSubtreeModifiedEvent, |
| DOMNodeInsertedEvent, |
| DOMNodeRemovedEvent, |
| DOMNodeRemovedFromDocumentEvent, |
| DOMNodeInsertedIntoDocumentEvent, |
| DOMCharacterDataModifiedEvent, |
| DocumentAllTags, |
| DocumentAllLegacyCall, |
| HTMLAppletElementLegacyCall, |
| HTMLEmbedElementLegacyCall, |
| HTMLObjectElementLegacyCall, |
| // Add new features immediately above this line. Don't change assigned |
| // numbers of each items, and don't reuse unused slots. |
| NumberOfFeatures, // This enum value must be last. |
| }; |
| |
| // "count" sets the bit for this feature to 1. Repeated calls are ignored. |
| static void count(Document*, Feature); |
| static void count(DOMWindow*, Feature); |
| void count(CSSParserContext, CSSPropertyID); |
| void count(Feature); |
| |
| // "countDeprecation" sets the bit for this feature to 1, and sends a deprecation |
| // warning to the console. Repeated calls are ignored. |
| // |
| // Be considerate to developers' consoles: features should only send deprecation warnings |
| // when we're actively interested in removing them from the platform. |
| static void countDeprecation(DOMWindow*, Feature); |
| static void countDeprecation(ScriptExecutionContext*, Feature); |
| static void countDeprecation(Document*, Feature); |
| String deprecationMessage(Feature); |
| |
| void didCommitLoad(); |
| |
| static UseCounter* getFrom(const Document*); |
| static UseCounter* getFrom(const CSSStyleSheet*); |
| static UseCounter* getFrom(const StyleSheetContents*); |
| |
| static int mapCSSPropertyIdToCSSSampleIdForHistogram(int id); |
| |
| private: |
| bool recordMeasurement(Feature feature) |
| { |
| ASSERT(feature != PageDestruction); // PageDestruction is reserved as a scaling factor. |
| ASSERT(feature < NumberOfFeatures); |
| if (!m_countBits) { |
| m_countBits = adoptPtr(new BitVector(NumberOfFeatures)); |
| m_countBits->clearAll(); |
| } |
| |
| if (m_countBits->quickGet(feature)) |
| return false; |
| |
| m_countBits->quickSet(feature); |
| return true; |
| } |
| |
| void updateMeasurements(); |
| |
| OwnPtr<BitVector> m_countBits; |
| BitVector m_CSSFeatureBits; |
| }; |
| |
| } // namespace WebCore |
| |
| #endif // UseCounter_h |
