- From: Mercurial notifier <cvsmail@w3.org>
- Date: Thu, 19 Sep 2013 13:26:45 +0000
- To: public-dap-commits@w3.org
changeset: 460:f300fed49d3e
tag: tip
user: Anssi Kostiainen <anssi.kostiainen@intel.com>
date: Thu Sep 19 16:26:15 2013 +0300
files: light/CR.html light/CR.src.html proximity/CR.html proximity/CR.src.html
description:
CR snapshots
diff -r fe8ca2ddadcd -r f300fed49d3e light/CR.html
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+ <body class="h-entry" role="document" id="respecDocument"><div class="head" role="contentinfo" id="respecHeader">
+ <p>
+
+ <a href="http://www.w3.org/"><img width="72" height="48" src="https://www.w3.org/Icons/w3c_home" alt="W3C"></a>
+
+ </p>
+ <h1 class="title p-name" id="title" property="dcterms:title">Ambient Light Events</h1>
+
+ <h2 property="dcterms:issued" datatype="xsd:dateTime" content="2013-09-30T21:00:00.000Z" id="w3c-candidate-recommendation-01-october-2013"><abbr title="World Wide Web Consortium">W3C</abbr> Candidate Recommendation <time class="dt-published" datetime="2013-10-01">01 October 2013</time></h2>
+ <dl>
+
+ <dt>This version:</dt>
+ <dd><a class="u-url" href="http://www.w3.org/TR/2013/CR-ambient-light-20131001/">http://www.w3.org/TR/2013/CR-ambient-light-20131001/</a></dd>
+ <dt>Latest published version:</dt>
+ <dd><a href="http://www.w3.org/TR/ambient-light/">http://www.w3.org/TR/ambient-light/</a></dd>
+
+
+ <dt>Latest editor's draft:</dt>
+ <dd><a href="http://dvcs.w3.org/hg/dap/raw-file/default/light/Overview.html">http://dvcs.w3.org/hg/dap/raw-file/default/light/Overview.html</a></dd>
+
+
+ <dt>Test suite:</dt>
+ <dd><a href="https://w3c-test.org/web-platform-tests/submissions/126/ambient-light/">https://w3c-test.org/web-platform-tests/submissions/126/ambient-light/</a></dd>
+
+
+
+
+ <dt>Previous version:</dt>
+ <dd><a rel="dcterms:replaces" href="http://www.w3.org/TR/2012/WD-ambient-light-20121213/">http://www.w3.org/TR/2012/WD-ambient-light-20121213/</a></dd>
+
+
+ <dt>Editors:</dt>
+ <dd class="p-author h-card vcard" rel="bibo:editor" inlist=""><span typeof="foaf:Person"><span property="foaf:name" class="p-name fn">Doug Turner</span>, <a rel="foaf:workplaceHomepage" class="p-org org h-org h-card" href="http://mozilla.com/">Mozilla Corporation</a></span>
+</dd>
+<dd class="p-author h-card vcard" rel="bibo:editor" inlist=""><span typeof="foaf:Person"><span property="foaf:name" class="p-name fn">Anssi Kostiainen</span>, <a rel="foaf:workplaceHomepage" class="p-org org h-org h-card" href="http://intel.com/">Intel</a></span>
+</dd>
+
+
+
+
+
+ <dt>Revision history:</dt>
+
+
+
+ <dd>
+ <a href="https://dvcs.w3.org/hg/dap/log/default/light/Overview.src.html">
+ https://dvcs.w3.org/hg/dap/log/default/light/Overview.src.html
+ </a>
+ </dd>
+
+
+
+
+
+
+ </dl>
+
+
+
+
+
+ <p class="copyright">
+ <a href="http://www.w3.org/Consortium/Legal/ipr-notice#Copyright">Copyright</a> ©
+ 2013
+
+ <a href="http://www.w3.org/"><abbr title="World Wide Web Consortium">W3C</abbr></a><sup>®</sup>
+ (<a href="http://www.csail.mit.edu/"><abbr title="Massachusetts Institute of Technology">MIT</abbr></a>,
+ <a href="http://www.ercim.eu/"><abbr title="European Research Consortium for Informatics and Mathematics">ERCIM</abbr></a>,
+ <a href="http://www.keio.ac.jp/">Keio</a>, <a href="http://ev.buaa.edu.cn/">Beihang</a>), All Rights Reserved.
+ <abbr title="World Wide Web Consortium">W3C</abbr> <a href="http://www.w3.org/Consortium/Legal/ipr-notice#Legal_Disclaimer">liability</a>,
+ <a href="http://www.w3.org/Consortium/Legal/ipr-notice#W3C_Trademarks">trademark</a> and
+ <a href="http://www.w3.org/Consortium/Legal/copyright-documents">document use</a> rules apply.
+ </p>
+
+
+ <hr>
+</div>
+ <section id="abstract" class="introductory" property="dcterms:abstract" datatype="" typeof="bibo:Chapter" resource="#abstract" rel="bibo:chapter"><h2 aria-level="1" role="heading" id="h2_abstract">Abstract</h2><p>
+ This specification defines a means to receive events that correspond to
+ a light sensor detecting the presence of a light.
+ </p></section><section id="sotd" class="introductory" typeof="bibo:Chapter" resource="#sotd" rel="bibo:chapter"><h2 aria-level="1" role="heading" id="h2_sotd">Status of This Document</h2>
+
+
+
+ <p>
+ <em>This section describes the status of this document at the time of its publication. Other
+ documents may supersede this document. A list of current <abbr title="World Wide Web Consortium">W3C</abbr> publications and the latest revision
+ of this technical report can be found in the <a href="http://www.w3.org/TR/"><abbr title="World Wide Web Consortium">W3C</abbr> technical reports
+ index</a> at http://www.w3.org/TR/.</em>
+ </p>
+
+ <p>
+ The functionality described in this specification was initially
+ specified as part of the
+ <a href="http://dvcs.w3.org/hg/dap/raw-file/default/sensor-api/Overview.html">
+ Sensor API</a> but has been extracted in order to be more
+ straightforward to implement, and in order to produce a specification
+ that could be implemented on its own merits without interference with
+ other features.
+ </p>
+ <p>
+ Changes in this document since the previously published First Public Working Draft
+ include the addition of the Light Level section with the LightLevelEvent interface,
+ editorial cleanup, and an update to the references.
+ </p>
+
+ <p>
+ This document was published by the <a href="http://www.w3.org/2009/dap/">Device APIs Working Group</a> as a Candidate Recommendation.
+
+ This document is intended to become a <abbr title="World Wide Web Consortium">W3C</abbr> Recommendation.
+
+
+ If you wish to make comments regarding this document, please send them to
+ <a href="mailto:public-device-apis@w3.org">public-device-apis@w3.org</a>
+ (<a href="mailto:public-device-apis-request@w3.org?subject=subscribe">subscribe</a>,
+ <a href="http://lists.w3.org/Archives/Public/public-device-apis/">archives</a>).
+
+
+
+ <abbr title="World Wide Web Consortium">W3C</abbr> publishes a Candidate Recommendation to indicate that the document is believed
+ to be stable and to encourage implementation by the developer community. This
+ Candidate Recommendation is expected to advance to Proposed Recommendation no earlier than
+ 21 November 2013.
+
+
+ All comments are welcome.</p>
+
+
+ <p>
+ Publication as a Candidate Recommendation does not imply endorsement by the <abbr title="World Wide Web Consortium">W3C</abbr> Membership.
+ This is a draft document and may be updated, replaced or obsoleted by other documents at
+ any time. It is inappropriate to cite this document as other than work in progress.
+ </p>
+
+
+ <p>
+
+ This document was produced by a group operating under the
+
+ <a id="sotd_patent" about="" rel="w3p:patentRules" href="http://www.w3.org/Consortium/Patent-Policy-20040205/">5 February 2004 <abbr title="World Wide Web Consortium">W3C</abbr> Patent Policy</a>.
+
+
+
+
+
+ <abbr title="World Wide Web Consortium">W3C</abbr> maintains a <a href="http://www.w3.org/2004/01/pp-impl/43696/status" rel="disclosure">public list of any patent disclosures</a>
+
+ made in connection with the deliverables of the group; that page also includes instructions for
+ disclosing a patent. An individual who has actual knowledge of a patent which the individual believes contains
+ <a href="http://www.w3.org/Consortium/Patent-Policy-20040205/#def-essential">Essential Claim(s)</a> must disclose the
+ information in accordance with <a href="http://www.w3.org/Consortium/Patent-Policy-20040205/#sec-Disclosure">section
+ 6 of the <abbr title="World Wide Web Consortium">W3C</abbr> Patent Policy</a>.
+
+
+ </p>
+
+
+
+
+</section><section id="toc"><h2 class="introductory" aria-level="1" role="heading" id="h2_toc">Table of Contents</h2><ul class="toc" role="directory" id="respecContents"><li class="tocline"><a href="#introduction" class="tocxref"><span class="secno">1. </span>Introduction</a></li><li class="tocline"><a href="#conformance" class="tocxref"><span class="secno">2. </span>Conformance</a></li><li class="tocline"><a href="#terminology" class="tocxref"><span class="secno">3. </span>Terminology</a></li><li class="tocline"><a href="#security-and-privacy-considerations" class="tocxref"><span class="secno">4. </span>Security and privacy considerations</a></li><li class="tocline"><a href="#device-light" class="tocxref"><span class="secno">5. </span>Device Light</a><ul class="toc"><li class="tocline"><a href="#devicelightevent-interface" class="tocxref"><span class="secno">5.1 </span><span class="formerLink"><code>DeviceLightEvent</code></span> Interface</a><ul class="toc"><li class="tocline"><a href="#event-handlers" cass="tocxref"><span class="secno">5.1.1 </span>Event handlers</a></li></ul></li></ul></li><li class="tocline"><a href="#light-level" class="tocxref"><span class="secno">6. </span>Light Level</a><ul class="toc"><li class="tocline"><a href="#lightlevelevent-interface" class="tocxref"><span class="secno">6.1 </span><span class="formerLink"><code>LightLevelEvent</code></span> Interface</a><ul class="toc"><li class="tocline"><a href="#event-handlers-1" class="tocxref"><span class="secno">6.1.1 </span>Event handlers</a></li></ul></li></ul></li><li class="tocline"><a href="#acknowledgements" class="tocxref"><span class="secno">A. </span>Acknowledgements</a></li><li class="tocline"><a href="#references" class="tocxref"><span class="secno">B. </span>References</a><ul class="toc"><li class="tocline"><a href="#normative-references" class="tocxref"><span class="secno">B.1 </span>Normative references</a></li></ul></li></ul></section>
+
+
+
+ <section class="informative" id="introduction">
+ <!--OddPage--><h2 aria-level="1" role="heading" id="h2_introduction"><span class="secno">1. </span>Introduction</h2><p><em>This section is non-normative.</em></p>
+ <p>
+ This specification defines events that provide information about the
+ ambient light level, as measured by a device's light sensor. A
+ <a href="#idl-def-LightLevelEvent" class="idlType"><code>LightLevelEvent</code></a> describes the light level as one of three simple
+ categories - "dim", "normal", and "bright" - while a
+ <a href="#idl-def-DeviceLightEvent" class="idlType"><code>DeviceLightEvent</code></a> provides a more granular answer by describing
+ the light level in terms of lux units.
+ </p>
+ </section>
+
+ <section id="conformance" typeof="bibo:Chapter" resource="#conformance" rel="bibo:chapter"><!--OddPage--><h2 aria-level="1" role="heading" id="h2_conformance"><span class="secno">2. </span>Conformance</h2>
+<p>
+ As well as sections marked as non-normative, all authoring guidelines, diagrams, examples,
+ and notes in this specification are non-normative. Everything else in this specification is
+ normative.
+</p>
+<p>
+ The key words <em class="rfc2119" title="MUST">MUST</em>, <em class="rfc2119" title="MUST NOT">MUST NOT</em>, <em class="rfc2119" title="REQUIRED">REQUIRED</em>, <em class="rfc2119" title="SHOULD">SHOULD</em>, <em class="rfc2119" title="SHOULD NOT">SHOULD NOT</em>, <em class="rfc2119" title="RECOMMENDED">RECOMMENDED</em>, <em class="rfc2119" title="MAY">MAY</em>,
+ and <em class="rfc2119" title="OPTIONAL">OPTIONAL</em> in this specification are to be interpreted as described in [<cite><a class="bibref" href="#bib-RFC2119">RFC2119</a></cite>].
+</p>
+
+ <p>
+ This specification defines conformance criteria that apply to a single
+ product: the <dfn id="dfn-user-agent">user agent</dfn> that implements the
+ interfaces that it contains.
+ </p>
+ <p>
+ Implementations that use ECMAScript to implement the APIs
+ defined in this specification must implement them in a manner
+ consistent with the ECMAScript Bindings defined in the Web IDL
+ specification [<cite><a class="bibref" href="#bib-WEBIDL">WEBIDL</a></cite>], as this specification uses that
+ specification and terminology.
+ </p>
+ </section>
+
+ <section id="terminology">
+ <!--OddPage--><h2 aria-level="1" role="heading" id="h2_terminology"><span class="secno">3. </span>Terminology</h2>
+ <p>
+ The <code><a href="http://dev.w3.org/html5/spec/webappapis.html#eventhandler">
+ EventHandler</a></code> interface represents a <a href="http://www.w3.org/TR/WebIDL/#idl-callback-functions">callback function</a> used for <a href="http://dev.w3.org/html5/spec/webappapis.html#event-handlers">event
+ handlers</a> as defined in [<cite><a class="bibref" href="#bib-HTML5">HTML5</a></cite>]. </p>
+ <p>
+ The concepts <dfn id="dfn-queue-a-task"><a href="http://dev.w3.org/html5/spec/webappapis.html#queue-a-task">
+ queue a task</a></dfn>,
+ <dfn id="dfn-fires-a-simple-event"><a href="http://dev.w3.org/html5/spec/webappapis.html#fire-a-simple-event">
+ fires a simple event</a></dfn>, and <dfn id="dfn-top-level-browsing-context">
+ <a href="http://dev.w3.org/html5/spec/browsers.html#top-level-browsing-context">
+ top-level browsing context</a></dfn> are defined in [<cite><a class="bibref" href="#bib-HTML5">HTML5</a></cite>].
+ </p>
+ <p>
+ The terms <dfn id="dfn-event-handlers"><a href="http://dev.w3.org/html5/spec/webappapis.html#event-handlers">
+ event handlers</a></dfn> and
+ <dfn id="dfn-event-handler-event-types"><a href="http://dev.w3.org/html5/spec/webappapis.html#event-handler-event-type">
+ event handler event types</a></dfn> are defined in [<cite><a class="bibref" href="#bib-HTML5">HTML5</a></cite>].
+ </p>
+ <p>
+ Event constructor behavior is defined in
+ <dfn id="dfn-constructing-events"><a href="http://dom.spec.whatwg.org/#constructing-events">
+ constructing events</a></dfn> chapter in [<cite><a class="bibref" href="#bib-DOM4">DOM4</a></cite>].
+ </p>
+ <p>
+ The concepts <dfn id="dfn-create-an-event">
+ <a href="http://dom.spec.whatwg.org/#constructing-events">
+ create an event</a></dfn> and <dfn id="dfn-fire-an-event">
+ <a href="http://dom.spec.whatwg.org/#firing-events">
+ fire an event</a></dfn> are defined in [<cite><a class="bibref" href="#bib-DOM4">DOM4</a></cite>].
+ </p>
+ <p>
+ The <dfn id="dfn-current-light-level">current light level</dfn> is a value that represents the ambient
+ light levels around the hosting device in lux units.
+ </p>
+ <p>
+ The <dfn id="dfn-current-light-level-state">current light level state</dfn> represents the ambient light level
+ around the hosting device as a human-readable string.
+ </p>
+ </section>
+
+ <section class="informative" id="security-and-privacy-considerations">
+ <!--OddPage--><h2 aria-level="1" role="heading" id="h2_security-and-privacy-considerations"><span class="secno">4. </span>Security and privacy considerations</h2><p><em>This section is non-normative.</em></p>
+ <p>
+ Privacy risks can arise when this specification is used in
+ combination with other functionality or when used over time,
+ specifically with the risk of correlation of data and user
+ identification through fingerprinting. Web application developers
+ using these JavaScript APIs should consider how this information might
+ be correlated with other information and the privacy risks that might
+ be created. The potential risks of collection of such data over a
+ longer period of time should also be considered.
+ </p>
+ <p>
+ Variations in implementation light level values as well as event firing
+ rates offer the possibility of fingerprinting to identify users.
+ Browser implementations may reduce the risk by only using the less
+ precise <a href="#idl-def-LightLevelState" class="idlType"><code>LightLevelState</code></a> of 'dim', 'normal', and 'bright' and limiting
+ event rates available to web application developers.
+ </p>
+ <p>
+ If the same JavaScript code using the API can be used simultaneously in
+ different window contexts on the same device it may be possible for
+ that code to correlate the user across those two contexts, creating
+ unanticipated tracking mechanisms.
+ </p>
+ <p>
+ Browser implementations should consider providing the user an
+ indication of when the sensor is used and allowing the user to disable
+ sensing.
+ </p>
+ <p>
+ Web application developers that use this specification should perform a
+ privacy assessment of their application taking all aspects of their
+ application into consideration.
+ </p>
+ <p>
+ The events defined in this specification are only fired in the
+ <a href="#dfn-top-level-browsing-context" class="internalDFN">top-level browsing context</a> to avoid the privacy risk of
+ sharing the information defined in this specification with contexts
+ unfamiliar to the user. For example, a mobile device will only fire
+ these events on the active tab, and not on the background tabs or
+ within iframes.
+ </p>
+ </section>
+
+ <section id="device-light">
+ <!--OddPage--><h2 aria-level="1" role="heading" id="h2_device-light"><span class="secno">5. </span>Device Light</h2>
+ <p>
+ The <a href="#idl-def-DeviceLightEvent" class="idlType"><code>DeviceLightEvent</code></a> interface provides information about the
+ ambient light levels, as detected by the device's light detector, in
+ terms of lux units.
+ </p>
+ <p>
+ The HTML5 specification [<cite><a class="bibref" href="#bib-HTML5">HTML5</a></cite>] defines a <a href="#idl-def-Window" class="idlType"><code>Window</code></a> interface,
+ which this specification extends:
+ </p>
+ <pre class="idl"><span class="idlInterface" id="idl-def-Window">partial interface <span class="idlInterfaceID">Window</span> {
+<span class="idlAttribute"> attribute <span class="idlAttrType"><a>EventHandler</a></span> <span class="idlAttrName"><a href="#widl-Window-ondevicelight">ondevicelight</a></span>;</span>
+};</span></pre>
+ <p>
+ The <code>ondevicelight</code> event handler and its corresponding
+ event handler event type <code>devicelight</code> <em class="rfc2119" title="MUST">MUST</em> be supported
+ as an IDL attribute by all objects implementing the <a href="#idl-def-Window" class="idlType"><code>Window</code></a>
+ interface.
+ </p>
+ <section id="devicelightevent-interface">
+ <h3 aria-level="2" role="heading" id="h3_devicelightevent-interface"><span class="secno">5.1 </span><a href="#idl-def-DeviceLightEvent" class="idlType"><code>DeviceLightEvent</code></a> Interface</h3>
+ <pre class="idl"><span class="idlInterface" id="idl-def-DeviceLightEvent"><span class="idlDictionary" id="idl-def-DeviceLightEventInit">dictionary <span class="idlDictionaryID">DeviceLightEventInit</span> : <span class="idlSuperclass"><a>EventInit</a></span> {
+<span class="idlMember"> <span class="idlMemberType"><a>unrestricted double</a></span> <span class="idlMemberName"><a href="#widl-DeviceLightEventInit-value">value</a></span>;</span>
+};</span><br><br>[<span class="extAttr">Constructor (DOMString type, optional DeviceLightEventInit eventInitDict)</span>]
+interface <span class="idlInterfaceID">DeviceLightEvent</span> : <span class="idlSuperclass"><a>Event</a></span> {
+<span class="idlAttribute"> readonly attribute <span class="idlAttrType"><a>unrestricted double</a></span> <span class="idlAttrName"><a href="#widl-DeviceLightEvent-value">value</a></span>;</span>
+};</span></pre>
+
+ <p>
+ The <code>value</code> attribute of the <a href="#idl-def-DeviceLightEvent" class="idlType"><code>DeviceLightEvent</code></a>
+ interface <em class="rfc2119" title="MUST">MUST</em> return the value it was initialized to. When the
+ object is created, this attribute <em class="rfc2119" title="MUST">MUST</em> be initialized to positive
+ Infinity. It represents the <a href="#dfn-current-light-level" class="internalDFN">current light level</a>.
+ </p>
+ <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_1"><span>Note</span></div><div class="">
+ The precise lux value reported by different devices in the same light
+ can be different, due to differences in detection method, sensor
+ construction etc.
+ </div></div>
+ <p>
+ When a <dfn id="dfn-user-agent-1">user agent</dfn> is required to <dfn id="dfn-fire-a-device-light-event">fire a device
+ light event</dfn>, the <dfn id="dfn-user-agent-2">user agent</dfn> <em class="rfc2119" title="MUST">MUST</em> run the
+ following steps:
+ </p>
+ <ol class="rule">
+ <li>
+ <a href="#dfn-create-an-event" class="internalDFN">Create an event</a> that uses the <a href="#idl-def-DeviceLightEvent" class="idlType"><code>DeviceLightEvent</code></a>
+ interface, with the name <code>devicelight</code>, which
+ bubbles, is not cancelable, and has no default action, that also
+ meets the following conditions:
+ <ol>
+ <li>
+ If the implementation is unable to report the <a href="#dfn-current-light-level" class="internalDFN">current
+ light level</a>, initialize the <code>value</code>
+ attribute to positive Infinity, otherwise initialize the
+ attribute to the <a href="#dfn-current-light-level" class="internalDFN">current light level</a>.
+ </li>
+ </ol>
+ </li>
+ </ol>
+ <p>
+ When the <a href="#dfn-current-light-level" class="internalDFN">current light level</a> changes, the <dfn id="dfn-user-agent-3">user agent</dfn>
+ <em class="rfc2119" title="MUST">MUST</em> queue a task to <a href="#dfn-fire-a-device-light-event" class="internalDFN">fire a device light event</a>
+ at the <a href="#dfn-top-level-browsing-context" class="internalDFN">top-level browsing context</a>'s <a href="#idl-def-Window" class="idlType"><code>Window</code></a> object.
+ </p>
+ <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_2"><span>Note</span></div><div class="">
+ The definition of granularity i.e. how often the event is fired is
+ left to the implementation. Implementations can fire the event if
+ they have reason to believe that the page does not have sufficiently
+ fresh data.
+ </div></div>
+ <section id="event-handlers">
+ <h4 aria-level="3" role="heading" id="h4_event-handlers"><span class="secno">5.1.1 </span>Event handlers</h4>
+ <p>
+ The following are the <a href="#dfn-event-handlers" class="internalDFN">event handlers</a> (and their corresponding
+ <a href="#dfn-event-handler-event-types" class="internalDFN">event handler event types</a>) that <em class="rfc2119" title="MUST">MUST</em> be supported as
+ attributes by the <a href="#idl-def-Window" class="idlType"><code>Window</code></a> object:
+ </p>
+ <table class="simple">
+ <thead>
+ <tr>
+ <th>event handler</th>
+ <th>event handler event type</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td><strong><code>ondevicelight</code></strong></td>
+ <td><code>devicelight</code></td>
+ </tr>
+ </tbody>
+ </table>
+ </section>
+ </section>
+ </section>
+
+ <section id="light-level">
+ <!--OddPage--><h2 aria-level="1" role="heading" id="h2_light-level"><span class="secno">6. </span>Light Level</h2>
+ <p>
+ The <a href="#idl-def-LightLevelEvent" class="idlType"><code>LightLevelEvent</code></a> interface provides information about the
+ ambient light levels, as detected by the device's light detector, in
+ terms of three general range: "dim", "normal", or "bright".
+ </p>
+ <p>
+ The HTML5 specification [<cite><a class="bibref" href="#bib-HTML5">HTML5</a></cite>] defines a <a href="#idl-def-Window" class="idlType"><code>Window</code></a> interface,
+ which this specification extends:
+ </p>
+ <pre class="idl"><span class="idlInterface" id="idl-def-Window-1">partial interface <span class="idlInterfaceID">Window</span> {
+<span class="idlAttribute"> attribute <span class="idlAttrType"><a>EventHandler</a></span> <span class="idlAttrName"><a href="#widl-Window-onlightlevel">onlightlevel</a></span>;</span>
+};</span></pre>
+ <p>
+ The <code>onlightlevel</code> event handler and its corresponding
+ event handler event type <code>lightlevel</code> <em class="rfc2119" title="MUST">MUST</em> be supported
+ as an IDL attribute by all objects implementing the <a href="#idl-def-Window" class="idlType"><code>Window</code></a>
+ interface.
+ </p>
+ <section id="lightlevelevent-interface">
+ <h3 aria-level="2" role="heading" id="h3_lightlevelevent-interface"><span class="secno">6.1 </span><a href="#idl-def-LightLevelEvent" class="idlType"><code>LightLevelEvent</code></a> Interface</h3>
+ <pre class="idl"><span class="idlInterface" id="idl-def-LightLevelEvent"><span class="idlEnum" id="idl-def-LightLevelState">enum <span class="idlEnumID">LightLevelState</span> {
+ "<a href="#idl-def-LightLevelState.generatedID" class="idlEnumItem"></a>",
+ "<a href="#idl-def-LightLevelState.dim" class="idlEnumItem">dim</a>",
+ "<a href="#idl-def-LightLevelState.normal" class="idlEnumItem">normal</a>",
+ "<a href="#idl-def-LightLevelState.bright" class="idlEnumItem">bright</a>"
+};</span><br><br><span class="idlDictionary" id="idl-def-LightLevelEventInit">dictionary <span class="idlDictionaryID">LightLevelEventInit</span> : <span class="idlSuperclass"><a>EventInit</a></span> {
+<span class="idlMember"> <span class="idlMemberType"><a href="#idl-def-LightLevelState" class="idlType"><code>LightLevelState</code></a></span> <span class="idlMemberName"><a href="#widl-LightLevelEventInit-value">value</a></span>;</span>
+};</span><br><br>[<span class="extAttr">Constructor (DOMString type, optional LightLevelEventInit eventInitDict)</span>]
+interface <span class="idlInterfaceID">LightLevelEvent</span> : <span class="idlSuperclass"><a>Event</a></span> {
+<span class="idlAttribute"> readonly attribute <span class="idlAttrType"><a href="#idl-def-LightLevelState" class="idlType"><code>LightLevelState</code></a></span> <span class="idlAttrName"><a href="#widl-LightLevelEvent-value">value</a></span>;</span>
+};</span></pre>
+
+
+ <p>
+ The <code>value</code> attribute of the <a href="#idl-def-LightLevelEvent" class="idlType"><code>LightLevelEvent</code></a>
+ interface <em class="rfc2119" title="MUST">MUST</em> return the value it was initialized to. When the
+ object is created, this attribute <em class="rfc2119" title="MUST">MUST</em> be initialized to an empty
+ string. It represents the <a href="#dfn-current-light-level-state" class="internalDFN">current light level state</a>.
+ </p>
+ <p>
+ When a <dfn id="dfn-user-agent-4">user agent</dfn> is required to <dfn id="dfn-fire-a-light-level-event">fire a light
+ level event</dfn>, the <dfn id="dfn-user-agent-5">user agent</dfn> <em class="rfc2119" title="MUST">MUST</em> run the
+ following steps:
+ </p>
+ <ol class="rule">
+ <li>
+ <a href="#dfn-create-an-event" class="internalDFN">Create an event</a> that uses the <a href="#idl-def-LightLevelEvent" class="idlType"><code>LightLevelEvent</code></a>
+ interface, with the name <code>lightlevel</code>, which
+ bubbles, is not cancelable, and has no default action, that also
+ meets the following conditions:
+ <ol>
+ <li>
+ If the implementation is unable to report the <a href="#dfn-current-light-level-state" class="internalDFN">current
+ light level state</a>, initialize the <code>value</code>
+ attribute to an empty string, otherwise initialize the
+ attribute to the <a href="#dfn-current-light-level-state" class="internalDFN">current light level state</a>, which <em class="rfc2119" title="MUST">MUST</em>
+ be one of the following values:
+ <ul>
+ <li><code>dim</code></li>
+ <li><code>normal</code></li>
+ <li><code>bright</code></li>
+ </ul>
+ <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_3"><span>Note</span></div><div class="">
+ The lux ranges that map to the <a href="#dfn-current-light-level-state" class="internalDFN">current light level
+ state</a>s are left to the implementation, as devices with
+ different sensitivities could map them slightly differently.
+ However, it is recommended that "<code>dim</code>" correspond
+ to ambient light below 50 lux (dark enough that the light
+ produced by a white background is eye-straining or
+ distracting), "<code>normal</code>" correspond to light
+ between 50 lux and 10000 lux (office building hallway, very
+ dark overcast day, office lighting, sunrise or sunset on a
+ clear day, overcast day, or similar), and
+ "<code>bright</code>" correspond to light above 10000 lux
+ (direct sunlight, or similarly bright conditions that make it
+ hard to see things that aren't high-contrast).
+ </div></div>
+ </li>
+ </ol>
+ </li>
+ </ol>
+ <p>
+ When the <a href="#dfn-current-light-level-state" class="internalDFN">current light level state</a> changes, the <dfn id="dfn-user-agent-6">user agent</dfn>
+ <em class="rfc2119" title="MUST">MUST</em> queue a task to <a>fire a user proximity event</a>
+ at the <a href="#dfn-top-level-browsing-context" class="internalDFN">top-level browsing context</a>'s <a href="#idl-def-Window" class="idlType"><code>Window</code></a> object.
+ </p>
+
+ <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_4"><span>Note</span></div><div class="">
+ The definition of granularity i.e. how often the event is fired is
+ left to the implementation. Implementations can fire the event if
+ they have reason to believe that the page does not have sufficiently
+ fresh data.
+ </div></div>
+ <section id="event-handlers-1">
+ <h4 aria-level="3" role="heading" id="h4_event-handlers-1"><span class="secno">6.1.1 </span>Event handlers</h4>
+ <p>
+ The following are the <a href="#dfn-event-handlers" class="internalDFN">event handlers</a> (and their corresponding
+ <a href="#dfn-event-handler-event-types" class="internalDFN">event handler event types</a>) that <em class="rfc2119" title="MUST">MUST</em> be supported as
+ attributes by the <a href="#idl-def-Window" class="idlType"><code>Window</code></a> object:
+ </p>
+ <table class="simple">
+ <thead>
+ <tr>
+ <th>event handler</th>
+ <th>event handler event type</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td><strong><code>onlightlevel</code></strong></td>
+ <td><code>lightlevel</code></td>
+ </tr>
+ </tbody>
+ </table>
+ </section>
+ </section>
+ </section>
+
+ <section class="appendix" id="acknowledgements">
+ <!--OddPage--><h2 aria-level="1" role="heading" id="h2_acknowledgements"><span class="secno">A. </span>Acknowledgements</h2>
+ <p>
+ Doug Turner for the <a href="http://dougturner.wordpress.com/2012/03/26/device-light-sensor/">initial prototype</a> and
+ Marcos Caceres for the test suite.
+ </p>
+ </section>
+
+
+<section id="references" class="appendix" typeof="bibo:Chapter" resource="#references" rel="bibo:chapter"><!--OddPage--><h2 aria-level="1" role="heading" id="h2_references"><span class="secno">B. </span>References</h2><section id="normative-references" typeof="bibo:Chapter" resource="#normative-references" rel="bibo:chapter"><h3 aria-level="2" role="heading" id="h3_normative-references"><span class="secno">B.1 </span>Normative references</h3><dl class="bibliography" about=""><dt id="bib-DOM4">[DOM4]</dt><dd rel="dcterms:requires">Anne van Kesteren; Aryeh Gregor; Lachlan Hunt; Ms2ger. <a href="http://www.w3.org/TR/dom/"><cite>DOM4</cite></a>. 6 December 2012. W3C Working Draft. URL: <a href="http://www.w3.org/TR/dom/">http://www.w3.org/TR/dom/</a>
+</dd><dt id="bib-HTML5">[HTML5]</dt><dd rel="dcterms:requires">Robin Berjon; Steve Faulkner; Travis Leithead; Erika Doyle Navara; Edward O'Connor; Silvia Pfeiffer. <a href="http://www.w3.org/TR/html5/"><cite>HTML5</cite></a>. 6 August 2013. W3C Candidate Recommendation. URL: <a href="http://www.w3.org/TR/html5/">http://www.w3.org/TR/html5/</a>
+</dd><dt id="bib-RFC2119">[RFC2119]</dt><dd rel="dcterms:requires">S. Bradner. <a href="http://www.ietf.org/rfc/rfc2119.txt"><cite>Key words for use in RFCs to Indicate Requirement Levels.</cite></a> March 1997. Internet RFC 2119. URL: <a href="http://www.ietf.org/rfc/rfc2119.txt">http://www.ietf.org/rfc/rfc2119.txt</a>
+</dd><dt id="bib-WEBIDL">[WEBIDL]</dt><dd rel="dcterms:requires">Cameron McCormack. <a href="http://www.w3.org/TR/WebIDL/"><cite>Web IDL</cite></a>. 19 April 2012. W3C Candidate Recommendation. URL: <a href="http://www.w3.org/TR/WebIDL/">http://www.w3.org/TR/WebIDL/</a>
+</dd></dl></section></section></body></html>
\ No newline at end of file
diff -r fe8ca2ddadcd -r f300fed49d3e light/CR.src.html
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/light/CR.src.html Thu Sep 19 16:26:15 2013 +0300
@@ -0,0 +1,434 @@
+<!DOCTYPE html>
+<html>
+ <head>
+ <title>Ambient Light Events</title>
+ <meta charset="utf-8"/>
+ <script src='https://www.w3.org/Tools/respec/respec-w3c-common' class='remove' async></script>
+ <script class="remove">
+ var respecConfig = {
+ specStatus: "CR",
+ shortName: "ambient-light",
+ publishDate: "2013-10-01",
+ previousPublishDate: "2012-12-13",
+ previousMaturity: "LC",
+ edDraftURI: "http://dvcs.w3.org/hg/dap/raw-file/default/light/Overview.html",
+ crEnd: "2013-11-21",
+ editors: [
+ { name: "Doug Turner", company: "Mozilla Corporation", companyURL: "http://mozilla.com/" },
+ { name: "Anssi Kostiainen", company: "Intel", companyURL: "http://intel.com/" }
+ ],
+ inlineCSS: true,
+ noIDLIn: true,
+ noLegacyStyle: true,
+ wg: "Device APIs Working Group",
+ wgURI: "http://www.w3.org/2009/dap/",
+ wgPublicList: "public-device-apis",
+ wgPatentURI: "http://www.w3.org/2004/01/pp-impl/43696/status",
+ testSuiteURI: "https://w3c-test.org/web-platform-tests/submissions/126/ambient-light/",
+ scheme: "https",
+ otherLinks: [{
+ key: "Revision history",
+ data: [{
+ value: "https://dvcs.w3.org/hg/dap/log/default/light/Overview.src.html",
+ href: "https://dvcs.w3.org/hg/dap/log/default/light/Overview.src.html"
+ }]
+ }]
+ };
+ </script>
+ </head>
+ <body>
+ <section id="abstract">
+ This specification defines a means to receive events that correspond to
+ a light sensor detecting the presence of a light.
+ </section>
+
+ <section id="sotd">
+ <p>
+ The functionality described in this specification was initially
+ specified as part of the
+ <a href="http://dvcs.w3.org/hg/dap/raw-file/default/sensor-api/Overview.html">
+ Sensor API</a> but has been extracted in order to be more
+ straightforward to implement, and in order to produce a specification
+ that could be implemented on its own merits without interference with
+ other features.
+ </p>
+ <p>
+ Changes in this document since the previously published First Public Working Draft
+ include the addition of the Light Level section with the LightLevelEvent interface,
+ editorial cleanup, and an update to the references.
+ </p>
+ </section>
+
+ <section class="informative">
+ <h2>Introduction</h2>
+ <p>
+ This specification defines events that provide information about the
+ ambient light level, as measured by a device's light sensor. A
+ <a>LightLevelEvent</a> describes the light level as one of three simple
+ categories - "dim", "normal", and "bright" - while a
+ <a>DeviceLightEvent</a> provides a more granular answer by describing
+ the light level in terms of lux units.
+ </p>
+ </section>
+
+ <section id="conformance">
+ <p>
+ This specification defines conformance criteria that apply to a single
+ product: the <dfn>user agent</dfn> that implements the
+ interfaces that it contains.
+ </p>
+ <p>
+ Implementations that use ECMAScript to implement the APIs
+ defined in this specification must implement them in a manner
+ consistent with the ECMAScript Bindings defined in the Web IDL
+ specification [[!WEBIDL]], as this specification uses that
+ specification and terminology.
+ </p>
+ </section>
+
+ <section>
+ <h2>Terminology</h2>
+ <p>
+ The <code><a href="http://dev.w3.org/html5/spec/webappapis.html#eventhandler">
+ EventHandler</a></code> interface represents a <a href="http://www.w3.org/TR/WebIDL/#idl-callback-functions">callback function</a> used for <a href="http://dev.w3.org/html5/spec/webappapis.html#event-handlers">event
+ handlers</a> as defined in [[!HTML5]]. </p>
+ <p>
+ The concepts <dfn><a href="http://dev.w3.org/html5/spec/webappapis.html#queue-a-task">
+ queue a task</a></dfn>,
+ <dfn><a href="http://dev.w3.org/html5/spec/webappapis.html#fire-a-simple-event">
+ fires a simple event</a></dfn>, and <dfn>
+ <a href="http://dev.w3.org/html5/spec/browsers.html#top-level-browsing-context">
+ top-level browsing context</a></dfn> are defined in [[!HTML5]].
+ </p>
+ <p>
+ The terms <dfn><a href="http://dev.w3.org/html5/spec/webappapis.html#event-handlers">
+ event handlers</a></dfn> and
+ <dfn><a href="http://dev.w3.org/html5/spec/webappapis.html#event-handler-event-type">
+ event handler event types</a></dfn> are defined in [[!HTML5]].
+ </p>
+ <p>
+ Event constructor behavior is defined in
+ <dfn><a href="http://dom.spec.whatwg.org/#constructing-events">
+ constructing events</a></dfn> chapter in [[!DOM4]].
+ </p>
+ <p>
+ The concepts <dfn>
+ <a href="http://dom.spec.whatwg.org/#constructing-events">
+ create an event</a></dfn> and <dfn>
+ <a href="http://dom.spec.whatwg.org/#firing-events">
+ fire an event</a></dfn> are defined in [[!DOM4]].
+ </p>
+ <p>
+ The <dfn>current light level</dfn> is a value that represents the ambient
+ light levels around the hosting device in lux units.
+ </p>
+ <p>
+ The <dfn>current light level state</dfn> represents the ambient light level
+ around the hosting device as a human-readable string.
+ </p>
+ </section>
+
+ <section class="informative">
+ <h2>Security and privacy considerations</h2>
+ <p>
+ Privacy risks can arise when this specification is used in
+ combination with other functionality or when used over time,
+ specifically with the risk of correlation of data and user
+ identification through fingerprinting. Web application developers
+ using these JavaScript APIs should consider how this information might
+ be correlated with other information and the privacy risks that might
+ be created. The potential risks of collection of such data over a
+ longer period of time should also be considered.
+ </p>
+ <p>
+ Variations in implementation light level values as well as event firing
+ rates offer the possibility of fingerprinting to identify users.
+ Browser implementations may reduce the risk by only using the less
+ precise <a>LightLevelState</a> of 'dim', 'normal', and 'bright' and limiting
+ event rates available to web application developers.
+ </p>
+ <p>
+ If the same JavaScript code using the API can be used simultaneously in
+ different window contexts on the same device it may be possible for
+ that code to correlate the user across those two contexts, creating
+ unanticipated tracking mechanisms.
+ </p>
+ <p>
+ Browser implementations should consider providing the user an
+ indication of when the sensor is used and allowing the user to disable
+ sensing.
+ </p>
+ <p>
+ Web application developers that use this specification should perform a
+ privacy assessment of their application taking all aspects of their
+ application into consideration.
+ </p>
+ <p>
+ The events defined in this specification are only fired in the
+ <a>top-level browsing context</a> to avoid the privacy risk of
+ sharing the information defined in this specification with contexts
+ unfamiliar to the user. For example, a mobile device will only fire
+ these events on the active tab, and not on the background tabs or
+ within iframes.
+ </p>
+ </section>
+
+ <section>
+ <h2>Device Light</h2>
+ <p>
+ The <a>DeviceLightEvent</a> interface provides information about the
+ ambient light levels, as detected by the device's light detector, in
+ terms of lux units.
+ </p>
+ <p>
+ The HTML5 specification [[!HTML5]] defines a <a>Window</a> interface,
+ which this specification extends:
+ </p>
+ <dl title="partial interface Window" class="idl">
+ <dt>
+ attribute EventHandler ondevicelight
+ </dt>
+ <dd></dd>
+ </dl>
+ <p>
+ The <code>ondevicelight</code> event handler and its corresponding
+ event handler event type <code>devicelight</code> MUST be supported
+ as an IDL attribute by all objects implementing the <a>Window</a>
+ interface.
+ </p>
+ <section>
+ <h2><a>DeviceLightEvent</a> Interface</h2>
+ <dl title="[Constructor (DOMString type, optional DeviceLightEventInit eventInitDict)]
+ interface DeviceLightEvent : Event"
+ class="idl" data-merge='DeviceLightEventInit'>
+ <dt>
+ readonly attribute unrestricted double value
+ </dt>
+ <dd></dd>
+ </dl>
+ <dl title="dictionary DeviceLightEventInit : EventInit" class='idl'>
+ <dt>
+ unrestricted double value
+ </dt>
+ <dd></dd>
+ </dl>
+ <p>
+ The <code>value</code> attribute of the <a>DeviceLightEvent</a>
+ interface MUST return the value it was initialized to. When the
+ object is created, this attribute MUST be initialized to positive
+ Infinity. It represents the <a>current light level</a>.
+ </p>
+ <div class="note">
+ The precise lux value reported by different devices in the same light
+ can be different, due to differences in detection method, sensor
+ construction etc.
+ </div>
+ <p>
+ When a <dfn>user agent</dfn> is required to <dfn>fire a device
+ light event</dfn>, the <dfn>user agent</dfn> MUST run the
+ following steps:
+ </p>
+ <ol class="rule">
+ <li>
+ <a>Create an event</a> that uses the <a>DeviceLightEvent</a>
+ interface, with the name <code>devicelight</code>, which
+ bubbles, is not cancelable, and has no default action, that also
+ meets the following conditions:
+ <ol>
+ <li>
+ If the implementation is unable to report the <a>current
+ light level</a>, initialize the <code>value</code>
+ attribute to positive Infinity, otherwise initialize the
+ attribute to the <a>current light level</a>.
+ </li>
+ </ol>
+ </li>
+ </ol>
+ <p>
+ When the <a>current light level</a> changes, the <dfn>user agent</dfn>
+ MUST queue a task to <a>fire a device light event</a>
+ at the <a>top-level browsing context</a>'s <a>Window</a> object.
+ </p>
+ <div class="note">
+ The definition of granularity i.e. how often the event is fired is
+ left to the implementation. Implementations can fire the event if
+ they have reason to believe that the page does not have sufficiently
+ fresh data.
+ </div>
+ <section>
+ <h2>Event handlers</h2>
+ <p>
+ The following are the <a>event handlers</a> (and their corresponding
+ <a>event handler event types</a>) that MUST be supported as
+ attributes by the <a>Window</a> object:
+ </p>
+ <table class="simple">
+ <thead>
+ <tr>
+ <th>event handler</th>
+ <th>event handler event type</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td><strong><code>ondevicelight</code></strong></td>
+ <td><code>devicelight</code></td>
+ </tr>
+ </tbody>
+ </table>
+ </section>
+ </section>
+ </section>
+
+ <section>
+ <h2>Light Level</h2>
+ <p>
+ The <a>LightLevelEvent</a> interface provides information about the
+ ambient light levels, as detected by the device's light detector, in
+ terms of three general range: "dim", "normal", or "bright".
+ </p>
+ <p>
+ The HTML5 specification [[!HTML5]] defines a <a>Window</a> interface,
+ which this specification extends:
+ </p>
+ <dl title="partial interface Window" class="idl">
+ <dt>
+ attribute EventHandler onlightlevel
+ </dt>
+ <dd>
+ </dd>
+ </dl>
+ <p>
+ The <code>onlightlevel</code> event handler and its corresponding
+ event handler event type <code>lightlevel</code> MUST be supported
+ as an IDL attribute by all objects implementing the <a>Window</a>
+ interface.
+ </p>
+ <section>
+ <h2><a>LightLevelEvent</a> Interface</h2>
+ <dl title="[Constructor (DOMString type, optional LightLevelEventInit eventInitDict)]
+ interface LightLevelEvent : Event"
+ class="idl" data-merge='LightLevelEventInit LightLevelState'>
+ <dt>
+ readonly attribute LightLevelState value
+ </dt>
+ <dd></dd>
+ </dl>
+ <dl id="enum-basic" class="idl" title="enum LightLevelState">
+ <dt>
+ ‍<!-- (empty string) -->
+ </dt>
+ <dd></dd>
+ <dt>
+ dim
+ </dt>
+ <dd></dd>
+ <dt>
+ normal
+ </dt>
+ <dd></dd>
+ <dt>
+ bright
+ </dt>
+ <dd></dd>
+ </dl>
+ <dl title="dictionary LightLevelEventInit : EventInit" class='idl'>
+ <dt>
+ LightLevelState value
+ </dt>
+ <dd></dd>
+ </dl>
+ <p>
+ The <code>value</code> attribute of the <a>LightLevelEvent</a>
+ interface MUST return the value it was initialized to. When the
+ object is created, this attribute MUST be initialized to an empty
+ string. It represents the <a>current light level state</a>.
+ </p>
+ <p>
+ When a <dfn>user agent</dfn> is required to <dfn>fire a light
+ level event</dfn>, the <dfn>user agent</dfn> MUST run the
+ following steps:
+ </p>
+ <ol class="rule">
+ <li>
+ <a>Create an event</a> that uses the <a>LightLevelEvent</a>
+ interface, with the name <code>lightlevel</code>, which
+ bubbles, is not cancelable, and has no default action, that also
+ meets the following conditions:
+ <ol>
+ <li>
+ If the implementation is unable to report the <a>current
+ light level state</a>, initialize the <code>value</code>
+ attribute to an empty string, otherwise initialize the
+ attribute to the <a>current light level state</a>, which MUST
+ be one of the following values:
+ <ul>
+ <li><code>dim</code></li>
+ <li><code>normal</code></li>
+ <li><code>bright</code></li>
+ </ul>
+ <div class="note">
+ The lux ranges that map to the <a>current light level
+ state</a>s are left to the implementation, as devices with
+ different sensitivities could map them slightly differently.
+ However, it is recommended that "<code>dim</code>" correspond
+ to ambient light below 50 lux (dark enough that the light
+ produced by a white background is eye-straining or
+ distracting), "<code>normal</code>" correspond to light
+ between 50 lux and 10000 lux (office building hallway, very
+ dark overcast day, office lighting, sunrise or sunset on a
+ clear day, overcast day, or similar), and
+ "<code>bright</code>" correspond to light above 10000 lux
+ (direct sunlight, or similarly bright conditions that make it
+ hard to see things that aren't high-contrast).
+ </div>
+ </li>
+ </ol>
+ </li>
+ </ol>
+ <p>
+ When the <a>current light level state</a> changes, the <dfn>user agent</dfn>
+ MUST queue a task to <a>fire a user proximity event</a>
+ at the <a>top-level browsing context</a>'s <a>Window</a> object.
+ </p>
+
+ <div class="note">
+ The definition of granularity i.e. how often the event is fired is
+ left to the implementation. Implementations can fire the event if
+ they have reason to believe that the page does not have sufficiently
+ fresh data.
+ </div>
+ <section>
+ <h2>Event handlers</h2>
+ <p>
+ The following are the <a>event handlers</a> (and their corresponding
+ <a>event handler event types</a>) that MUST be supported as
+ attributes by the <a>Window</a> object:
+ </p>
+ <table class="simple">
+ <thead>
+ <tr>
+ <th>event handler</th>
+ <th>event handler event type</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td><strong><code>onlightlevel</code></strong></td>
+ <td><code>lightlevel</code></td>
+ </tr>
+ </tbody>
+ </table>
+ </section>
+ </section>
+ </section>
+
+ <section class="appendix">
+ <h2>Acknowledgements</h2>
+ <p>
+ Doug Turner for the <a href="http://dougturner.wordpress.com/2012/03/26/device-light-sensor/">initial prototype</a> and
+ Marcos Caceres for the test suite.
+ </p>
+ </section>
+ </body>
+</html>
diff -r fe8ca2ddadcd -r f300fed49d3e proximity/CR.html
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/proximity/CR.html Thu Sep 19 16:26:15 2013 +0300
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+</style><link rel="stylesheet" href="https://www.w3.org/StyleSheets/TR/W3C-CR"><!--[if lt IE 9]><script src='https://www.w3.org/2008/site/js/html5shiv.js'></script><![endif]--></head>
+ <body class="h-entry" role="document" id="respecDocument"><div class="head" role="contentinfo" id="respecHeader">
+ <p>
+
+ <a href="http://www.w3.org/"><img width="72" height="48" src="https://www.w3.org/Icons/w3c_home" alt="W3C"></a>
+
+ </p>
+ <h1 class="title p-name" id="title" property="dcterms:title">Proximity Events</h1>
+
+ <h2 property="dcterms:issued" datatype="xsd:dateTime" content="2013-09-30T21:00:00.000Z" id="w3c-candidate-recommendation-01-october-2013"><abbr title="World Wide Web Consortium">W3C</abbr> Candidate Recommendation <time class="dt-published" datetime="2013-10-01">01 October 2013</time></h2>
+ <dl>
+
+ <dt>This version:</dt>
+ <dd><a class="u-url" href="http://www.w3.org/TR/2013/CR-proximity-20131001/">http://www.w3.org/TR/2013/CR-proximity-20131001/</a></dd>
+ <dt>Latest published version:</dt>
+ <dd><a href="http://www.w3.org/TR/proximity/">http://www.w3.org/TR/proximity/</a></dd>
+
+
+ <dt>Latest editor's draft:</dt>
+ <dd><a href="http://dvcs.w3.org/hg/dap/raw-file/default/proximity/Overview.html">http://dvcs.w3.org/hg/dap/raw-file/default/proximity/Overview.html</a></dd>
+
+
+ <dt>Test suite:</dt>
+ <dd><a href="https://w3c-test.org/web-platform-tests/submissions/127/proximity/">https://w3c-test.org/web-platform-tests/submissions/127/proximity/</a></dd>
+
+
+
+
+ <dt>Previous version:</dt>
+ <dd><a rel="dcterms:replaces" href="http://www.w3.org/TR/2012/WD-proximity-20121206/">http://www.w3.org/TR/2012/WD-proximity-20121206/</a></dd>
+
+
+ <dt>Editors:</dt>
+ <dd class="p-author h-card vcard" rel="bibo:editor" inlist=""><span typeof="foaf:Person"><span property="foaf:name" class="p-name fn">Anssi Kostiainen</span>, <a rel="foaf:workplaceHomepage" class="p-org org h-org h-card" href="http://intel.com/">Intel</a></span>
+</dd>
+<dd class="p-author h-card vcard" rel="bibo:editor" inlist=""><span typeof="foaf:Person"><span property="foaf:name" class="p-name fn">Dzung D Tran</span>, <a rel="foaf:workplaceHomepage" class="p-org org h-org h-card" href="http://intel.com/">Intel</a></span>
+</dd>
+
+
+
+
+
+ <dt>Revision history:</dt>
+
+
+
+ <dd>
+ <a href="https://dvcs.w3.org/hg/dap/log/default/proximity/Overview.src.html">
+ https://dvcs.w3.org/hg/dap/log/default/proximity/Overview.src.html
+ </a>
+ </dd>
+
+
+
+
+
+
+ </dl>
+
+
+
+
+
+ <p class="copyright">
+ <a href="http://www.w3.org/Consortium/Legal/ipr-notice#Copyright">Copyright</a> ©
+ 2013
+
+ <a href="http://www.w3.org/"><abbr title="World Wide Web Consortium">W3C</abbr></a><sup>®</sup>
+ (<a href="http://www.csail.mit.edu/"><abbr title="Massachusetts Institute of Technology">MIT</abbr></a>,
+ <a href="http://www.ercim.eu/"><abbr title="European Research Consortium for Informatics and Mathematics">ERCIM</abbr></a>,
+ <a href="http://www.keio.ac.jp/">Keio</a>, <a href="http://ev.buaa.edu.cn/">Beihang</a>), All Rights Reserved.
+ <abbr title="World Wide Web Consortium">W3C</abbr> <a href="http://www.w3.org/Consortium/Legal/ipr-notice#Legal_Disclaimer">liability</a>,
+ <a href="http://www.w3.org/Consortium/Legal/ipr-notice#W3C_Trademarks">trademark</a> and
+ <a href="http://www.w3.org/Consortium/Legal/copyright-documents">document use</a> rules apply.
+ </p>
+
+
+ <hr>
+</div>
+ <section id="abstract" class="introductory" property="dcterms:abstract" datatype="" typeof="bibo:Chapter" resource="#abstract" rel="bibo:chapter"><h2 aria-level="1" role="heading" id="h2_abstract">Abstract</h2><p>
+ This specification defines a means to receive events that correspond to
+ a proximity sensor detecting the presence of a physical object.
+ </p></section><section id="sotd" class="introductory" typeof="bibo:Chapter" resource="#sotd" rel="bibo:chapter"><h2 aria-level="1" role="heading" id="h2_sotd">Status of This Document</h2>
+
+
+
+ <p>
+ <em>This section describes the status of this document at the time of its publication. Other
+ documents may supersede this document. A list of current <abbr title="World Wide Web Consortium">W3C</abbr> publications and the latest revision
+ of this technical report can be found in the <a href="http://www.w3.org/TR/"><abbr title="World Wide Web Consortium">W3C</abbr> technical reports
+ index</a> at http://www.w3.org/TR/.</em>
+ </p>
+
+ <p>
+ The functionality described in this specification was initially
+ specified as part of the
+ <a href="http://dvcs.w3.org/hg/dap/raw-file/default/sensor-api/Overview.html">
+ Sensor API</a> but has been extracted in order to be more
+ straightforward to implement, and in order to produce a specification
+ that could be implemented on its own merits without interference with
+ other features.
+ </p>
+
+ <p>
+ This document was published by the <a href="http://www.w3.org/2009/dap/">Device APIs Working Group</a> as a Candidate Recommendation.
+
+ This document is intended to become a <abbr title="World Wide Web Consortium">W3C</abbr> Recommendation.
+
+
+ If you wish to make comments regarding this document, please send them to
+ <a href="mailto:public-device-apis@w3.org">public-device-apis@w3.org</a>
+ (<a href="mailto:public-device-apis-request@w3.org?subject=subscribe">subscribe</a>,
+ <a href="http://lists.w3.org/Archives/Public/public-device-apis/">archives</a>).
+
+
+
+ <abbr title="World Wide Web Consortium">W3C</abbr> publishes a Candidate Recommendation to indicate that the document is believed
+ to be stable and to encourage implementation by the developer community. This
+ Candidate Recommendation is expected to advance to Proposed Recommendation no earlier than
+ 21 November 2013.
+
+
+ All comments are welcome.</p>
+
+
+ <p>
+ Publication as a Candidate Recommendation does not imply endorsement by the <abbr title="World Wide Web Consortium">W3C</abbr> Membership.
+ This is a draft document and may be updated, replaced or obsoleted by other documents at
+ any time. It is inappropriate to cite this document as other than work in progress.
+ </p>
+
+
+ <p>
+
+ This document was produced by a group operating under the
+
+ <a id="sotd_patent" about="" rel="w3p:patentRules" href="http://www.w3.org/Consortium/Patent-Policy-20040205/">5 February 2004 <abbr title="World Wide Web Consortium">W3C</abbr> Patent Policy</a>.
+
+
+
+
+
+ <abbr title="World Wide Web Consortium">W3C</abbr> maintains a <a href="http://www.w3.org/2004/01/pp-impl/43696/status" rel="disclosure">public list of any patent disclosures</a>
+
+ made in connection with the deliverables of the group; that page also includes instructions for
+ disclosing a patent. An individual who has actual knowledge of a patent which the individual believes contains
+ <a href="http://www.w3.org/Consortium/Patent-Policy-20040205/#def-essential">Essential Claim(s)</a> must disclose the
+ information in accordance with <a href="http://www.w3.org/Consortium/Patent-Policy-20040205/#sec-Disclosure">section
+ 6 of the <abbr title="World Wide Web Consortium">W3C</abbr> Patent Policy</a>.
+
+
+ </p>
+
+
+
+
+</section><section id="toc"><h2 class="introductory" aria-level="1" role="heading" id="h2_toc">Table of Contents</h2><ul class="toc" role="directory" id="respecContents"><li class="tocline"><a href="#introduction" class="tocxref"><span class="secno">1. </span>Introduction</a></li><li class="tocline"><a href="#conformance" class="tocxref"><span class="secno">2. </span>Conformance</a></li><li class="tocline"><a href="#terminology" class="tocxref"><span class="secno">3. </span>Terminology</a></li><li class="tocline"><a href="#security-and-privacy-considerations" class="tocxref"><span class="secno">4. </span>Security and privacy considerations</a></li><li class="tocline"><a href="#device-proximity" class="tocxref"><span class="secno">5. </span>Device proximity</a><ul class="toc"><li class="tocline"><a href="#deviceproximityevent-interface" class="tocxref"><span class="secno">5.1 </span><span class="formerLink"><code>DeviceProximityEvent</code></span> Interface</a><ul class="toc"><li class="tocline"><a href="#eent-handlers" class="tocxref"><span class="secno">5.1.1 </span>Event handlers</a></li></ul></li></ul></li><li class="tocline"><a href="#user-proximity" class="tocxref"><span class="secno">6. </span>User proximity</a><ul class="toc"><li class="tocline"><a href="#userproximityevent-interface" class="tocxref"><span class="secno">6.1 </span><span class="formerLink"><code>UserProximityEvent</code></span> Interface</a><ul class="toc"><li class="tocline"><a href="#event-handlers-1" class="tocxref"><span class="secno">6.1.1 </span>Event handlers</a></li></ul></li></ul></li><li class="tocline"><a href="#acknowledgements" class="tocxref"><span class="secno">A. </span>Acknowledgements</a></li><li class="tocline"><a href="#references" class="tocxref"><span class="secno">B. </span>References</a><ul class="toc"><li class="tocline"><a href="#normative-references" class="tocxref"><span class="secno">B.1 </span>Normative references</a></li></ul></li></ul></section>
+
+
+
+ <section class="informative" id="introduction">
+ <!--OddPage--><h2 aria-level="1" role="heading" id="h2_introduction"><span class="secno">1. </span>Introduction</h2><p><em>This section is non-normative.</em></p>
+ <p>
+ The <a href="#idl-def-DeviceProximityEvent" class="idlType"><code>DeviceProximityEvent</code></a> interface provides web developers
+ information about the distance between the hosting device and a
+ nearby object.
+ </p>
+ <p>
+ The <a href="#idl-def-UserProximityEvent" class="idlType"><code>UserProximityEvent</code></a> interface provides web developers
+ a user-agent- and platform-specific approximation that the hosting
+ device has sensed a nearby object.
+ </p>
+ <p>
+ This is achieved by interrogating a proximity sensor of a device, which
+ is a sensor that can detect the presence of a physical object without
+ physical contact. Not all devices contain a proximity sensor, and when
+ there is no proximity sensor, this API is still exposed to the
+ scripting environment but it does nothing.
+ </p>
+ <p>
+ Because most proximity sensors detect electromagnetic radiation (e.g.,
+ an infrared light or a magnetic field), certain material properties can
+ interfere with the sensor's ability to sense the presence of a physical
+ object. Things that can interfere with a sensor include, but are not
+ limited to, the material's translucency, reflectiveness, color,
+ temperature, chemical composition, and even the angle at which the
+ object is reflecting the radiation back at the sensor. As such,
+ proximity sensors should not be relied on as a means to measure
+ distance: the only thing that can be deduced from a proximity sensor is
+ that an object is somewhere in the distance between the minimum sensing
+ distance and the maximum sensing distance with some degree of
+ certainty.
+ </p>
+ </section>
+
+ <section id="conformance" typeof="bibo:Chapter" resource="#conformance" rel="bibo:chapter"><!--OddPage--><h2 aria-level="1" role="heading" id="h2_conformance"><span class="secno">2. </span>Conformance</h2>
+<p>
+ As well as sections marked as non-normative, all authoring guidelines, diagrams, examples,
+ and notes in this specification are non-normative. Everything else in this specification is
+ normative.
+</p>
+<p>
+ The key words <em class="rfc2119" title="MUST">MUST</em>, <em class="rfc2119" title="MUST NOT">MUST NOT</em>, <em class="rfc2119" title="REQUIRED">REQUIRED</em>, <em class="rfc2119" title="SHOULD">SHOULD</em>, <em class="rfc2119" title="SHOULD NOT">SHOULD NOT</em>, <em class="rfc2119" title="RECOMMENDED">RECOMMENDED</em>, <em class="rfc2119" title="MAY">MAY</em>,
+ and <em class="rfc2119" title="OPTIONAL">OPTIONAL</em> in this specification are to be interpreted as described in [<cite><a class="bibref" href="#bib-RFC2119">RFC2119</a></cite>].
+</p>
+
+ <p>
+ This specification defines conformance criteria that apply to a single
+ product: the <dfn id="dfn-user-agent">user agent</dfn> that implements the
+ interfaces that it contains.
+ </p>
+ <p>
+ Implementations that use ECMAScript to implement the APIs
+ defined in this specification must implement them in a manner
+ consistent with the ECMAScript Bindings defined in the Web IDL
+ specification [<cite><a class="bibref" href="#bib-WEBIDL">WEBIDL</a></cite>], as this specification uses that
+ specification and terminology.
+ </p>
+ </section>
+
+ <section id="terminology">
+ <!--OddPage--><h2 aria-level="1" role="heading" id="h2_terminology"><span class="secno">3. </span>Terminology</h2>
+ <p>
+ The <code><a href="http://dev.w3.org/html5/spec/webappapis.html#eventhandler">
+ EventHandler</a></code> interface represents a callback used for event
+ handlers as defined in [<cite><a class="bibref" href="#bib-HTML5">HTML5</a></cite>].
+ </p>
+ <p>
+ The concepts <dfn id="dfn-queue-a-task"><a href="http://dev.w3.org/html5/spec/webappapis.html#queue-a-task">
+ queue a task</a></dfn>,
+ <dfn id="dfn-fires-a-simple-event"><a href="http://dev.w3.org/html5/spec/webappapis.html#fire-a-simple-event">
+ fires a simple event</a></dfn>, and <dfn id="dfn-top-level-browsing-context">
+ <a href="http://dev.w3.org/html5/spec/browsers.html#top-level-browsing-context">
+ top-level browsing context</a></dfn> are defined in [<cite><a class="bibref" href="#bib-HTML5">HTML5</a></cite>].
+ </p>
+ <p>
+ Event constructor behavior is defined in
+ <dfn id="dfn-constructing-events"><a href="http://dom.spec.whatwg.org/#constructing-events">
+ constructing events</a></dfn> chapter in [<cite><a class="bibref" href="#bib-DOM4">DOM4</a></cite>].
+ </p>
+ <p>
+ The terms <dfn id="dfn-event-handlers"><a href="http://dev.w3.org/html5/spec/webappapis.html#event-handlers">
+ event handlers</a></dfn> and
+ <dfn id="dfn-event-handler-event-types"><a href="http://dev.w3.org/html5/spec/webappapis.html#event-handler-event-type">
+ event handler event types</a></dfn> are defined in [<cite><a class="bibref" href="#bib-HTML5">HTML5</a></cite>].
+ </p>
+ <p>
+ The concepts <dfn id="dfn-create-an-event">
+ <a href="http://dom.spec.whatwg.org/#constructing-events">
+ create an event</a></dfn> and <dfn id="dfn-fire-an-event">
+ <a href="http://dom.spec.whatwg.org/#firing-events">
+ fire an event</a></dfn> are defined in [<cite><a class="bibref" href="#bib-DOM4">DOM4</a></cite>].
+ </p>
+ <p>
+ The <dfn id="dfn-current-device-proximity">current device proximity</dfn> is a value that represents the
+ proximity of the hosting device to a physical object (i.e., some value
+ between the <a href="#dfn-maximum-sensing-distance" class="internalDFN">maximum sensing distance</a> and the <a href="#dfn-minimum-sensing-distance" class="internalDFN">minimum sensing
+ distance</a>), in centimeters.
+ </p>
+ <p>
+ The <dfn id="dfn-minimum-sensing-distance">minimum sensing distance</dfn> at which the sensor can detect
+ a physical object, in centimeters.
+ </p>
+ <p>
+ The <dfn id="dfn-maximum-sensing-distance">maximum sensing distance</dfn> at which the sensor can detect
+ a physical object, in centimeters.
+ </p>
+ <p>
+ The <dfn id="dfn-current-user-proximity-state">current user proximity state</dfn>, a boolean state, is a
+ user-agent- and platform-specific approximation of the closeness of a
+ physical object with the hosting device.
+ </p>
+ </section>
+
+ <section class="informative" id="security-and-privacy-considerations">
+ <!--OddPage--><h2 aria-level="1" role="heading" id="h2_security-and-privacy-considerations"><span class="secno">4. </span>Security and privacy considerations</h2><p><em>This section is non-normative.</em></p>
+ <p>
+ Privacy risks can arise when this specification is used in
+ combination with other functionality or when used over time,
+ specifically with the risk of correlation of data and user
+ identification through fingerprinting. Web application developers
+ using these JavaScript APIs should consider how this information might
+ be correlated with other information and the privacy risks that might
+ be created. The potential risks of collection of such data over a
+ longer period of time should also be considered.
+ </p>
+ <p>
+ Variations in implementation limits of minimum and maximum sensing
+ distance as well as event firing rates offer the possibility of
+ fingerprinting to identify users. Browser implementations may reduce
+ the risk by limiting the granularity and event rates available to web
+ application developers.
+ </p>
+ <p>
+ If the same JavaScript code using the API can be used simultaneously in
+ different window contexts on the same device it may be possible for
+ that code to correlate the user across those two contexts, creating
+ unanticipated tracking mechanisms.
+ </p>
+ <p>
+ Browser implementations should consider providing the user an
+ indication of when the sensor is used and allowing the user to disable
+ sensing.
+ </p>
+ <p>
+ Web application developers that use this specification should perform a
+ privacy assessment of their application taking all aspects of their
+ application into consideration.
+ </p>
+ <p>
+ The events defined in this specification are only fired in the
+ <a href="#dfn-top-level-browsing-context" class="internalDFN">top-level browsing context</a> to avoid the privacy risk of
+ sharing the information defined in this specification with contexts
+ unfamiliar to the user. For example, a mobile device will only fire
+ these events on the active tab, and not on the background tabs or
+ within iframes.
+ </p>
+ </section>
+
+ <section id="device-proximity">
+ <!--OddPage--><h2 aria-level="1" role="heading" id="h2_device-proximity"><span class="secno">5. </span>Device proximity</h2>
+ <p>
+ The HTML5 specification [<cite><a class="bibref" href="#bib-HTML5">HTML5</a></cite>] defines a <a href="#idl-def-Window" class="idlType"><code>Window</code></a> interface,
+ which this specification extends:
+ </p>
+ <pre class="idl"><span class="idlInterface" id="idl-def-Window">partial interface <span class="idlInterfaceID">Window</span> {
+<span class="idlAttribute"> attribute <span class="idlAttrType"><a>EventHandler</a></span> <span class="idlAttrName"><a href="#widl-Window-ondeviceproximity">ondeviceproximity</a></span>;</span>
+};</span></pre>
+ <p>
+ The <code>ondeviceproximity</code> event handler and its corresponding
+ event handler event type <code>deviceproximity</code> <em class="rfc2119" title="MUST">MUST</em> be supported
+ as an IDL attribute by all objects implementing the <a href="#idl-def-Window" class="idlType"><code>Window</code></a>
+ interface.
+ </p>
+ <section id="deviceproximityevent-interface">
+ <h3 aria-level="2" role="heading" id="h3_deviceproximityevent-interface"><span class="secno">5.1 </span><a href="#idl-def-DeviceProximityEvent" class="idlType"><code>DeviceProximityEvent</code></a> Interface</h3>
+ <pre class="idl"><span class="idlInterface" id="idl-def-DeviceProximityEvent"><span class="idlDictionary" id="idl-def-DeviceProximityEventInit">dictionary <span class="idlDictionaryID">DeviceProximityEventInit</span> : <span class="idlSuperclass"><a>EventInit</a></span> {
+<span class="idlMember"> <span class="idlMemberType"><a>double</a></span> <span class="idlMemberName"><a href="#widl-DeviceProximityEventInit-value">value</a></span>;</span>
+<span class="idlMember"> <span class="idlMemberType"><a>double</a></span> <span class="idlMemberName"><a href="#widl-DeviceProximityEventInit-min">min</a></span>;</span>
+<span class="idlMember"> <span class="idlMemberType"><a>double</a></span> <span class="idlMemberName"><a href="#widl-DeviceProximityEventInit-max">max</a></span>;</span>
+};</span><br><br>[<span class="extAttr">Constructor (DOMString type, optional DeviceProximityEventInit eventInitDict)</span>]
+interface <span class="idlInterfaceID">DeviceProximityEvent</span> : <span class="idlSuperclass"><a>Event</a></span> {
+<span class="idlAttribute"> readonly attribute <span class="idlAttrType"><a>unrestricted double</a></span> <span class="idlAttrName"><a href="#widl-DeviceProximityEvent-value">value</a></span>;</span>
+<span class="idlAttribute"> readonly attribute <span class="idlAttrType"><a>unrestricted double</a></span> <span class="idlAttrName"><a href="#widl-DeviceProximityEvent-min">min</a></span>;</span>
+<span class="idlAttribute"> readonly attribute <span class="idlAttrType"><a>unrestricted double</a></span> <span class="idlAttrName"><a href="#widl-DeviceProximityEvent-max">max</a></span>;</span>
+};</span></pre>
+
+ <p>
+ The <code>value</code> attribute of the <a href="#idl-def-DeviceProximityEvent" class="idlType"><code>DeviceProximityEvent</code></a>
+ interface <em class="rfc2119" title="MUST">MUST</em> return the value it was initialized to. When the
+ object is created, this attribute <em class="rfc2119" title="MUST">MUST</em> be initialized to positive
+ Infinity. It represents the <a href="#dfn-current-device-proximity" class="internalDFN">current device proximity</a>.
+ </p>
+ <p>
+ The <code>min</code> attribute of the <a href="#idl-def-DeviceProximityEvent" class="idlType"><code>DeviceProximityEvent</code></a>
+ interface <em class="rfc2119" title="MUST">MUST</em> return the value it was initialized to. When the
+ object is created, this attribute <em class="rfc2119" title="MUST">MUST</em> be initialized to negative
+ Infinity. It represents the <a href="#dfn-minimum-sensing-distance" class="internalDFN">minimum sensing distance</a>.
+ </p>
+ <p>
+ The <code>max</code> attribute of the <a href="#idl-def-DeviceProximityEvent" class="idlType"><code>DeviceProximityEvent</code></a>
+ interface <em class="rfc2119" title="MUST">MUST</em> return the value it was initialized to. When the
+ object is created, this attribute <em class="rfc2119" title="MUST">MUST</em> be initialized to positive
+ Infinity. It represents the <a href="#dfn-maximum-sensing-distance" class="internalDFN">maximum sensing distance</a>.
+ </p>
+ <p>
+ When a <dfn id="dfn-user-agent-1">user agent</dfn> is required to <dfn id="dfn-fire-a-device-proximity-event">fire a device
+ proximity event</dfn>, the <dfn id="dfn-user-agent-2">user agent</dfn> <em class="rfc2119" title="MUST">MUST</em> run the
+ following steps:
+ </p>
+ <ol class="rule">
+ <li>
+ <a href="#dfn-create-an-event" class="internalDFN">Create an event</a> that uses the <a href="#idl-def-DeviceProximityEvent" class="idlType"><code>DeviceProximityEvent</code></a>
+ interface, with the name <code>deviceproximity</code>, which
+ bubbles, is not cancelable, and has no default action, that also
+ meets the following conditions:
+ <ol>
+ <li>
+ If the implementation is unable to report the <a href="#dfn-current-device-proximity" class="internalDFN">current
+ device proximity</a>, initialize the <code>value</code>
+ attribute to positive Infinity, otherwise initialize the
+ attribute to the <a href="#dfn-current-device-proximity" class="internalDFN">current device proximity</a>.
+ </li>
+ <li>
+ If the implementation is unable to report the <a href="#dfn-minimum-sensing-distance" class="internalDFN">minimum
+ sensing distance</a>, initialize the <code>min</code>
+ attribute to negative Infinity, otherwise initialize the
+ attribute to the <a href="#dfn-minimum-sensing-distance" class="internalDFN">minimum sensing distance</a>.
+ </li>
+ <li>
+ If the implementation is unable to report the <a href="#dfn-maximum-sensing-distance" class="internalDFN">maximum
+ sensing distance</a>, initialize the <code>max</code>
+ attribute to positive Infinity, otherwise initialize the
+ attribute to the <a href="#dfn-maximum-sensing-distance" class="internalDFN">maximum sensing distance</a>.
+ </li>
+ </ol>
+ </li>
+ </ol>
+ <p>
+ When the <a href="#dfn-current-device-proximity" class="internalDFN">current device proximity</a> changes, the <dfn id="dfn-user-agent-3">user
+ agent</dfn> <em class="rfc2119" title="MUST">MUST</em> queue a task to <a href="#dfn-fire-a-device-proximity-event" class="internalDFN">fire a device proximity event</a>
+ at the <a href="#dfn-top-level-browsing-context" class="internalDFN">top-level browsing context</a>'s <a href="#idl-def-Window" class="idlType"><code>Window</code></a> object.
+ </p>
+ <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_1"><span>Note</span></div><div class="">
+ The definition of granularity i.e. how often the event is fired is
+ left to the implementation. Implementations can fire the event if
+ they have reason to believe that the page does not have sufficiently
+ fresh data. Different devices can also support different minimum and
+ maximum sensing distances as well as different resolution, thus
+ authors are strongly advised to use the <a href="#idl-def-UserProximityEvent" class="idlType"><code>UserProximityEvent</code></a>
+ interface if they are only interested in finding out if the user is
+ near or far.
+ </div></div>
+ <section id="event-handlers">
+ <h4 aria-level="3" role="heading" id="h4_event-handlers"><span class="secno">5.1.1 </span>Event handlers</h4>
+ <p>
+ The following are the <a href="#dfn-event-handlers" class="internalDFN">event handlers</a> (and their corresponding
+ <a href="#dfn-event-handler-event-types" class="internalDFN">event handler event types</a>) that <em class="rfc2119" title="MUST">MUST</em> be supported as
+ attributes by the <a href="#idl-def-Window" class="idlType"><code>Window</code></a> object:
+ </p>
+ <table class="simple">
+ <thead>
+ <tr>
+ <th>event handler</th>
+ <th>event handler event type</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td><strong><code>ondeviceproximity</code></strong></td>
+ <td><code>deviceproximity</code></td>
+ </tr>
+ </tbody>
+ </table>
+ </section>
+ </section>
+ </section>
+
+ <section id="user-proximity">
+ <!--OddPage--><h2 aria-level="1" role="heading" id="h2_user-proximity"><span class="secno">6. </span>User proximity</h2>
+ <p>
+ The HTML5 specification [<cite><a class="bibref" href="#bib-HTML5">HTML5</a></cite>] defines a <a href="#idl-def-Window" class="idlType"><code>Window</code></a> interface,
+ which this specification extends:
+ </p>
+ <pre class="idl"><span class="idlInterface" id="idl-def-Window-1">partial interface <span class="idlInterfaceID">Window</span> {
+<span class="idlAttribute"> attribute <span class="idlAttrType"><a>EventHandler</a></span> <span class="idlAttrName"><a href="#widl-Window-onuserproximity">onuserproximity</a></span>;</span>
+};</span></pre>
+ <p>
+ The <code>onuserproximity</code> event handler and its corresponding
+ event handler event type <code>userproximity</code> <em class="rfc2119" title="MUST">MUST</em> be supported
+ as an IDL attribute by all objects implementing the <a href="#idl-def-Window" class="idlType"><code>Window</code></a>
+ interface.
+ </p>
+ <section id="userproximityevent-interface">
+ <h3 aria-level="2" role="heading" id="h3_userproximityevent-interface"><span class="secno">6.1 </span><a href="#idl-def-UserProximityEvent" class="idlType"><code>UserProximityEvent</code></a> Interface</h3>
+ <pre class="idl"><span class="idlInterface" id="idl-def-UserProximityEvent"><span class="idlDictionary" id="idl-def-UserProximityEventInit">dictionary <span class="idlDictionaryID">UserProximityEventInit</span> : <span class="idlSuperclass"><a>EventInit</a></span> {
+<span class="idlMember"> <span class="idlMemberType"><a>boolean</a></span> <span class="idlMemberName"><a href="#widl-UserProximityEventInit-near">near</a></span>;</span>
+};</span><br><br>[<span class="extAttr">Constructor (DOMString type, optional UserProximityEventInit eventInitDict)</span>]
+interface <span class="idlInterfaceID">UserProximityEvent</span> : <span class="idlSuperclass"><a>Event</a></span> {
+<span class="idlAttribute"> readonly attribute <span class="idlAttrType"><a>boolean</a></span> <span class="idlAttrName"><a href="#widl-UserProximityEvent-near">near</a></span>;</span>
+};</span></pre>
+
+ <p>
+ The <code>near</code> attribute of the <a href="#idl-def-UserProximityEvent" class="idlType"><code>UserProximityEvent</code></a>
+ interface <em class="rfc2119" title="MUST">MUST</em> return the value it was initialized to. When the
+ object is created, this attribute <em class="rfc2119" title="MUST">MUST</em> be initialized to false.
+ It represents the <a href="#dfn-current-user-proximity-state" class="internalDFN">current user proximity state</a>.
+ </p>
+ <p>
+ When a <dfn id="dfn-user-agent-4">user agent</dfn> is required to <dfn id="dfn-fire-a-user-proximity-event">fire a user
+ proximity event</dfn>, the <dfn id="dfn-user-agent-5">user agent</dfn> <em class="rfc2119" title="MUST">MUST</em> run the
+ following steps:
+ </p>
+ <ol class="rule">
+ <li>
+ <a href="#dfn-create-an-event" class="internalDFN">Create an event</a> that uses the <a href="#idl-def-UserProximityEvent" class="idlType"><code>UserProximityEvent</code></a>
+ interface, with the name <code>userproximity</code>, which bubbles,
+ is not cancelable, and has no default action, that also meets the
+ following conditions:
+ <ol>
+ <li>
+ If the implementation is unable to report the <a href="#dfn-current-user-proximity-state" class="internalDFN">current user
+ proximity state</a>, initialize the <code>near</code> attribute
+ to false, otherwise initialize the attribute to the <a href="#dfn-current-user-proximity-state" class="internalDFN">current
+ user proximity state</a>.
+ </li>
+ </ol>
+ </li>
+ </ol>
+ <p>
+ When the <a href="#dfn-current-user-proximity-state" class="internalDFN">current user proximity state</a> changes, the <dfn id="dfn-user-agent-6">user
+ agent</dfn> <em class="rfc2119" title="MUST">MUST</em> queue a task to <a href="#dfn-fire-a-user-proximity-event" class="internalDFN">fire a user proximity event</a>
+ at the <a href="#dfn-top-level-browsing-context" class="internalDFN">top-level browsing context</a>'s <a href="#idl-def-Window" class="idlType"><code>Window</code></a> object.
+ </p>
+ <section id="event-handlers-1">
+ <h4 aria-level="3" role="heading" id="h4_event-handlers-1"><span class="secno">6.1.1 </span>Event handlers</h4>
+ <p>
+ The following are the <a href="#dfn-event-handlers" class="internalDFN">event handlers</a> (and their corresponding
+ <a href="#dfn-event-handler-event-types" class="internalDFN">event handler event types</a>) that <em class="rfc2119" title="MUST">MUST</em> be supported as
+ attributes by the <a href="#idl-def-Window" class="idlType"><code>Window</code></a> object:
+ </p>
+ <table class="simple">
+ <thead>
+ <tr>
+ <th>event handler</th>
+ <th>event handler event type</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td><strong><code>onuserproximity</code></strong></td>
+ <td><code>userproximity</code></td>
+ </tr>
+ </tbody>
+ </table>
+ </section>
+ </section>
+ </section>
+
+ <section class="appendix" id="acknowledgements">
+ <!--OddPage--><h2 aria-level="1" role="heading" id="h2_acknowledgements"><span class="secno">A. </span>Acknowledgements</h2>
+ <p>
+ Doug Turner for the initial prototype. All Device APIs working group
+ participants who have sent helpful feedback. Marcos Caceres for his
+ excellent work on the test suite.
+ </p>
+ </section>
+
+
+<section id="references" class="appendix" typeof="bibo:Chapter" resource="#references" rel="bibo:chapter"><!--OddPage--><h2 aria-level="1" role="heading" id="h2_references"><span class="secno">B. </span>References</h2><section id="normative-references" typeof="bibo:Chapter" resource="#normative-references" rel="bibo:chapter"><h3 aria-level="2" role="heading" id="h3_normative-references"><span class="secno">B.1 </span>Normative references</h3><dl class="bibliography" about=""><dt id="bib-DOM4">[DOM4]</dt><dd rel="dcterms:requires">Anne van Kesteren; Aryeh Gregor; Lachlan Hunt; Ms2ger. <a href="http://www.w3.org/TR/dom/"><cite>DOM4</cite></a>. 6 December 2012. W3C Working Draft. URL: <a href="http://www.w3.org/TR/dom/">http://www.w3.org/TR/dom/</a>
+</dd><dt id="bib-HTML5">[HTML5]</dt><dd rel="dcterms:requires">Robin Berjon; Steve Faulkner; Travis Leithead; Erika Doyle Navara; Edward O'Connor; Silvia Pfeiffer. <a href="http://www.w3.org/TR/html5/"><cite>HTML5</cite></a>. 6 August 2013. W3C Candidate Recommendation. URL: <a href="http://www.w3.org/TR/html5/">http://www.w3.org/TR/html5/</a>
+</dd><dt id="bib-RFC2119">[RFC2119]</dt><dd rel="dcterms:requires">S. Bradner. <a href="http://www.ietf.org/rfc/rfc2119.txt"><cite>Key words for use in RFCs to Indicate Requirement Levels.</cite></a> March 1997. Internet RFC 2119. URL: <a href="http://www.ietf.org/rfc/rfc2119.txt">http://www.ietf.org/rfc/rfc2119.txt</a>
+</dd><dt id="bib-WEBIDL">[WEBIDL]</dt><dd rel="dcterms:requires">Cameron McCormack. <a href="http://www.w3.org/TR/WebIDL/"><cite>Web IDL</cite></a>. 19 April 2012. W3C Candidate Recommendation. URL: <a href="http://www.w3.org/TR/WebIDL/">http://www.w3.org/TR/WebIDL/</a>
+</dd></dl></section></section></body></html>
\ No newline at end of file
diff -r fe8ca2ddadcd -r f300fed49d3e proximity/CR.src.html
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/proximity/CR.src.html Thu Sep 19 16:26:15 2013 +0300
@@ -0,0 +1,447 @@
+<!DOCTYPE html>
+<html>
+ <head>
+ <title>Proximity Events</title>
+ <meta http-equiv="Content-Type" content="text/html;charset=utf-8"/>
+ <script src='https://www.w3.org/Tools/respec/respec-w3c-common' class='remove' async></script>
+ <script class="remove">
+ var respecConfig = {
+ specStatus: "CR",
+ shortName: "proximity",
+ publishDate: "2013-10-01",
+ previousPublishDate: "2012-12-06",
+ previousMaturity: "LC",
+ edDraftURI: "http://dvcs.w3.org/hg/dap/raw-file/default/proximity/Overview.html",
+ crEnd: "2013-11-21",
+ editors: [
+ { name: "Anssi Kostiainen", company: "Intel", companyURL: "http://intel.com/" },
+ { name: "Dzung D Tran", company: "Intel", companyURL: "http://intel.com/" }
+ ],
+ inlineCSS: true,
+ noIDLIn: true,
+ noLegacyStyle: true,
+ //extraCSS: ["../ReSpec.js/css/respec.css"],
+ extraCSS: ["http://dev.w3.org/2009/dap/ReSpec.js/css/respec.css"],
+ wg: "Device APIs Working Group",
+ wgURI: "http://www.w3.org/2009/dap/",
+ wgPublicList: "public-device-apis",
+ wgPatentURI: "http://www.w3.org/2004/01/pp-impl/43696/status",
+ testSuiteURI: "https://w3c-test.org/web-platform-tests/submissions/127/proximity/",
+ scheme: "https",
+ otherLinks: [{
+ key: "Revision history",
+ data: [{
+ value: "https://dvcs.w3.org/hg/dap/log/default/proximity/Overview.src.html",
+ href: "https://dvcs.w3.org/hg/dap/log/default/proximity/Overview.src.html"
+ }]
+ }]
+ };
+ </script>
+ </head>
+ <body>
+ <section id="abstract">
+ This specification defines a means to receive events that correspond to
+ a proximity sensor detecting the presence of a physical object.
+ </section>
+
+ <section id="sotd">
+ <p>
+ The functionality described in this specification was initially
+ specified as part of the
+ <a href="http://dvcs.w3.org/hg/dap/raw-file/default/sensor-api/Overview.html">
+ Sensor API</a> but has been extracted in order to be more
+ straightforward to implement, and in order to produce a specification
+ that could be implemented on its own merits without interference with
+ other features.
+ </p>
+ </section>
+
+ <section class="informative">
+ <h2>Introduction</h2>
+ <p>
+ The <a>DeviceProximityEvent</a> interface provides web developers
+ information about the distance between the hosting device and a
+ nearby object.
+ </p>
+ <p>
+ The <a>UserProximityEvent</a> interface provides web developers
+ a user-agent- and platform-specific approximation that the hosting
+ device has sensed a nearby object.
+ </p>
+ <p>
+ This is achieved by interrogating a proximity sensor of a device, which
+ is a sensor that can detect the presence of a physical object without
+ physical contact. Not all devices contain a proximity sensor, and when
+ there is no proximity sensor, this API is still exposed to the
+ scripting environment but it does nothing.
+ </p>
+ <p>
+ Because most proximity sensors detect electromagnetic radiation (e.g.,
+ an infrared light or a magnetic field), certain material properties can
+ interfere with the sensor's ability to sense the presence of a physical
+ object. Things that can interfere with a sensor include, but are not
+ limited to, the material's translucency, reflectiveness, color,
+ temperature, chemical composition, and even the angle at which the
+ object is reflecting the radiation back at the sensor. As such,
+ proximity sensors should not be relied on as a means to measure
+ distance: the only thing that can be deduced from a proximity sensor is
+ that an object is somewhere in the distance between the minimum sensing
+ distance and the maximum sensing distance with some degree of
+ certainty.
+ </p>
+ </section>
+
+ <section id="conformance">
+ <p>
+ This specification defines conformance criteria that apply to a single
+ product: the <dfn>user agent</dfn> that implements the
+ interfaces that it contains.
+ </p>
+ <p>
+ Implementations that use ECMAScript to implement the APIs
+ defined in this specification must implement them in a manner
+ consistent with the ECMAScript Bindings defined in the Web IDL
+ specification [[!WEBIDL]], as this specification uses that
+ specification and terminology.
+ </p>
+ </section>
+
+ <section>
+ <h2>Terminology</h2>
+ <p>
+ The <code><a href="http://dev.w3.org/html5/spec/webappapis.html#eventhandler">
+ EventHandler</a></code> interface represents a callback used for event
+ handlers as defined in [[!HTML5]].
+ </p>
+ <p>
+ The concepts <dfn><a href="http://dev.w3.org/html5/spec/webappapis.html#queue-a-task">
+ queue a task</a></dfn>,
+ <dfn><a href="http://dev.w3.org/html5/spec/webappapis.html#fire-a-simple-event">
+ fires a simple event</a></dfn>, and <dfn>
+ <a href="http://dev.w3.org/html5/spec/browsers.html#top-level-browsing-context">
+ top-level browsing context</a></dfn> are defined in [[!HTML5]].
+ </p>
+ <p>
+ Event constructor behavior is defined in
+ <dfn><a href="http://dom.spec.whatwg.org/#constructing-events">
+ constructing events</a></dfn> chapter in [[!DOM4]].
+ </p>
+ <p>
+ The terms <dfn><a href="http://dev.w3.org/html5/spec/webappapis.html#event-handlers">
+ event handlers</a></dfn> and
+ <dfn><a href="http://dev.w3.org/html5/spec/webappapis.html#event-handler-event-type">
+ event handler event types</a></dfn> are defined in [[!HTML5]].
+ </p>
+ <p>
+ The concepts <dfn>
+ <a href="http://dom.spec.whatwg.org/#constructing-events">
+ create an event</a></dfn> and <dfn>
+ <a href="http://dom.spec.whatwg.org/#firing-events">
+ fire an event</a></dfn> are defined in [[!DOM4]].
+ </p>
+ <p>
+ The <dfn>current device proximity</dfn> is a value that represents the
+ proximity of the hosting device to a physical object (i.e., some value
+ between the <a>maximum sensing distance</a> and the <a>minimum sensing
+ distance</a>), in centimeters.
+ </p>
+ <p>
+ The <dfn>minimum sensing distance</dfn> at which the sensor can detect
+ a physical object, in centimeters.
+ </p>
+ <p>
+ The <dfn>maximum sensing distance</dfn> at which the sensor can detect
+ a physical object, in centimeters.
+ </p>
+ <p>
+ The <dfn>current user proximity state</dfn>, a boolean state, is a
+ user-agent- and platform-specific approximation of the closeness of a
+ physical object with the hosting device.
+ </p>
+ </section>
+
+ <section class="informative">
+ <h2>Security and privacy considerations</h2>
+ <p>
+ Privacy risks can arise when this specification is used in
+ combination with other functionality or when used over time,
+ specifically with the risk of correlation of data and user
+ identification through fingerprinting. Web application developers
+ using these JavaScript APIs should consider how this information might
+ be correlated with other information and the privacy risks that might
+ be created. The potential risks of collection of such data over a
+ longer period of time should also be considered.
+ </p>
+ <p>
+ Variations in implementation limits of minimum and maximum sensing
+ distance as well as event firing rates offer the possibility of
+ fingerprinting to identify users. Browser implementations may reduce
+ the risk by limiting the granularity and event rates available to web
+ application developers.
+ </p>
+ <p>
+ If the same JavaScript code using the API can be used simultaneously in
+ different window contexts on the same device it may be possible for
+ that code to correlate the user across those two contexts, creating
+ unanticipated tracking mechanisms.
+ </p>
+ <p>
+ Browser implementations should consider providing the user an
+ indication of when the sensor is used and allowing the user to disable
+ sensing.
+ </p>
+ <p>
+ Web application developers that use this specification should perform a
+ privacy assessment of their application taking all aspects of their
+ application into consideration.
+ </p>
+ <p>
+ The events defined in this specification are only fired in the
+ <a>top-level browsing context</a> to avoid the privacy risk of
+ sharing the information defined in this specification with contexts
+ unfamiliar to the user. For example, a mobile device will only fire
+ these events on the active tab, and not on the background tabs or
+ within iframes.
+ </p>
+ </section>
+
+ <section>
+ <h2>Device proximity</h2>
+ <p>
+ The HTML5 specification [[!HTML5]] defines a <a>Window</a> interface,
+ which this specification extends:
+ </p>
+ <dl title="partial interface Window" class="idl">
+ <dt>attribute EventHandler ondeviceproximity</dt>
+ <dd>
+ </dd>
+ </dl>
+ <p>
+ The <code>ondeviceproximity</code> event handler and its corresponding
+ event handler event type <code>deviceproximity</code> MUST be supported
+ as an IDL attribute by all objects implementing the <a>Window</a>
+ interface.
+ </p>
+ <section>
+ <h2><a>DeviceProximityEvent</a> Interface</h2>
+ <dl title="[Constructor (DOMString type, optional DeviceProximityEventInit eventInitDict)]
+ interface DeviceProximityEvent : Event"
+ class="idl" data-merge='DeviceProximityEventInit'>
+ <dt>
+ readonly attribute unrestricted double value
+ </dt>
+ <dd></dd>
+ <dt>
+ readonly attribute unrestricted double min
+ </dt>
+ <dd></dd>
+ <dt>
+ readonly attribute unrestricted double max
+ </dt>
+ <dd></dd>
+ </dl>
+ <dl title="dictionary DeviceProximityEventInit : EventInit" class='idl'>
+ <dt>
+ double value
+ </dt>
+ <dd></dd>
+ <dt>
+ double min
+ </dt>
+ <dd></dd>
+ <dt>
+ double max
+ </dt>
+ <dd></dd>
+ </dl>
+ <p>
+ The <code>value</code> attribute of the <a>DeviceProximityEvent</a>
+ interface MUST return the value it was initialized to. When the
+ object is created, this attribute MUST be initialized to positive
+ Infinity. It represents the <a>current device proximity</a>.
+ </p>
+ <p>
+ The <code>min</code> attribute of the <a>DeviceProximityEvent</a>
+ interface MUST return the value it was initialized to. When the
+ object is created, this attribute MUST be initialized to negative
+ Infinity. It represents the <a>minimum sensing distance</a>.
+ </p>
+ <p>
+ The <code>max</code> attribute of the <a>DeviceProximityEvent</a>
+ interface MUST return the value it was initialized to. When the
+ object is created, this attribute MUST be initialized to positive
+ Infinity. It represents the <a>maximum sensing distance</a>.
+ </p>
+ <p>
+ When a <dfn>user agent</dfn> is required to <dfn>fire a device
+ proximity event</dfn>, the <dfn>user agent</dfn> MUST run the
+ following steps:
+ </p>
+ <ol class="rule">
+ <li>
+ <a>Create an event</a> that uses the <a>DeviceProximityEvent</a>
+ interface, with the name <code>deviceproximity</code>, which
+ bubbles, is not cancelable, and has no default action, that also
+ meets the following conditions:
+ <ol>
+ <li>
+ If the implementation is unable to report the <a>current
+ device proximity</a>, initialize the <code>value</code>
+ attribute to positive Infinity, otherwise initialize the
+ attribute to the <a>current device proximity</a>.
+ </li>
+ <li>
+ If the implementation is unable to report the <a>minimum
+ sensing distance</a>, initialize the <code>min</code>
+ attribute to negative Infinity, otherwise initialize the
+ attribute to the <a>minimum sensing distance</a>.
+ </li>
+ <li>
+ If the implementation is unable to report the <a>maximum
+ sensing distance</a>, initialize the <code>max</code>
+ attribute to positive Infinity, otherwise initialize the
+ attribute to the <a>maximum sensing distance</a>.
+ </li>
+ </ol>
+ </li>
+ </ol>
+ <p>
+ When the <a>current device proximity</a> changes, the <dfn>user
+ agent</dfn> MUST queue a task to <a>fire a device proximity event</a>
+ at the <a>top-level browsing context</a>'s <a>Window</a> object.
+ </p>
+ <div class="note">
+ The definition of granularity i.e. how often the event is fired is
+ left to the implementation. Implementations can fire the event if
+ they have reason to believe that the page does not have sufficiently
+ fresh data. Different devices can also support different minimum and
+ maximum sensing distances as well as different resolution, thus
+ authors are strongly advised to use the <a>UserProximityEvent</a>
+ interface if they are only interested in finding out if the user is
+ near or far.
+ </div>
+ <section>
+ <h2>Event handlers</h2>
+ <p>
+ The following are the <a>event handlers</a> (and their corresponding
+ <a>event handler event types</a>) that MUST be supported as
+ attributes by the <a>Window</a> object:
+ </p>
+ <table class="simple">
+ <thead>
+ <tr>
+ <th>event handler</th>
+ <th>event handler event type</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td><strong><code>ondeviceproximity</code></strong></td>
+ <td><code>deviceproximity</code></td>
+ </tr>
+ </tbody>
+ </table>
+ </section>
+ </section>
+ </section>
+
+ <section>
+ <h2>User proximity</h2>
+ <p>
+ The HTML5 specification [[!HTML5]] defines a <a>Window</a> interface,
+ which this specification extends:
+ </p>
+ <dl title="partial interface Window" class="idl">
+ <dt>attribute EventHandler onuserproximity</dt>
+ <dd>
+ </dd>
+ </dl>
+ <p>
+ The <code>onuserproximity</code> event handler and its corresponding
+ event handler event type <code>userproximity</code> MUST be supported
+ as an IDL attribute by all objects implementing the <a>Window</a>
+ interface.
+ </p>
+ <section>
+ <h2><a>UserProximityEvent</a> Interface</h2>
+ <dl title="[Constructor (DOMString type, optional UserProximityEventInit eventInitDict)]
+ interface UserProximityEvent : Event"
+ class="idl" data-merge='UserProximityEventInit'>
+ <dt>readonly attribute boolean near</dt>
+ <dd>
+ The <a>current user proximity state</a>.
+ </dd>
+ </dl>
+ <dl title="dictionary UserProximityEventInit : EventInit" class='idl'>
+ <dt>
+ boolean near
+ </dt>
+ <dd></dd>
+ </dl>
+ <p>
+ The <code>near</code> attribute of the <a>UserProximityEvent</a>
+ interface MUST return the value it was initialized to. When the
+ object is created, this attribute MUST be initialized to false.
+ It represents the <a>current user proximity state</a>.
+ </p>
+ <p>
+ When a <dfn>user agent</dfn> is required to <dfn>fire a user
+ proximity event</dfn>, the <dfn>user agent</dfn> MUST run the
+ following steps:
+ </p>
+ <ol class="rule">
+ <li>
+ <a>Create an event</a> that uses the <a>UserProximityEvent</a>
+ interface, with the name <code>userproximity</code>, which bubbles,
+ is not cancelable, and has no default action, that also meets the
+ following conditions:
+ <ol>
+ <li>
+ If the implementation is unable to report the <a>current user
+ proximity state</a>, initialize the <code>near</code> attribute
+ to false, otherwise initialize the attribute to the <a>current
+ user proximity state</a>.
+ </li>
+ </ol>
+ </li>
+ </ol>
+ <p>
+ When the <a>current user proximity state</a> changes, the <dfn>user
+ agent</dfn> MUST queue a task to <a>fire a user proximity event</a>
+ at the <a>top-level browsing context</a>'s <a>Window</a> object.
+ </p>
+ <section>
+ <h2>Event handlers</h2>
+ <p>
+ The following are the <a>event handlers</a> (and their corresponding
+ <a>event handler event types</a>) that MUST be supported as
+ attributes by the <a>Window</a> object:
+ </p>
+ <table class="simple">
+ <thead>
+ <tr>
+ <th>event handler</th>
+ <th>event handler event type</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td><strong><code>onuserproximity</code></strong></td>
+ <td><code>userproximity</code></td>
+ </tr>
+ </tbody>
+ </table>
+ </section>
+ </section>
+ </section>
+
+ <section class="appendix">
+ <h2>Acknowledgements</h2>
+ <p>
+ Doug Turner for the initial prototype. All Device APIs working group
+ participants who have sent helpful feedback. Marcos Caceres for his
+ excellent work on the test suite.
+ </p>
+ </section>
+ </body>
+</html>
Received on Thursday, 19 September 2013 13:26:50 UTC