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dap commit: LC snapshot

From: Mercurial notifier <cvsmail@w3.org>
Date: Thu, 15 Nov 2012 09:41:08 +0000
Message-Id: <E1TYvwa-0003IT-A6@mcbain.w3.org>
To: public-dap-commits@w3.org
changeset:   274:c998af03abf3
tag:         tip
user:        Anssi Kostiainen <anssi.kostiainen@nokia.com>
date:        Thu Nov 15 11:40:43 2012 +0200
files:       proximity/LC.html
description:
LC snapshot


diff -r 3237ca9d12c3 -r c998af03abf3 proximity/LC.html
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/proximity/LC.html	Thu Nov 15 11:40:43 2012 +0200
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+</style><link rel="stylesheet" href="http://www.w3.org/StyleSheets/TR/W3C-WD"><!--[if lt IE 9]><script src='http://www.w3.org/2008/site/js/html5shiv.js'></script><![endif]--></head>
+  <body><div class="head">
+  <p>
+    
+      <a href="http://www.w3.org/"><img width="72" height="48" src="http://www.w3.org/Icons/w3c_home" alt="W3C"></a>
+    
+  </p>
+  <h1 class="title" id="title">Proximity Events</h1>
+  
+  <h2 id="w3c-working-draft-28-november-2012"><abbr title="World Wide Web Consortium">W3C</abbr> Working Draft 28 November 2012</h2>
+  <dl>
+    
+      <dt>This version:</dt>
+      <dd><a href="http://www.w3.org/TR/2012/WD-proximity-20121128/">http://www.w3.org/TR/2012/WD-proximity-20121128/</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/tip/proximity/Overview.html">http://dvcs.w3.org/hg/dap/raw-file/tip/proximity/Overview.html</a></dd>
+    
+    
+    
+    
+    
+      <dt>Previous version:</dt>
+      <dd><a href="http://www.w3.org/TR/2012/WD-proximity-20120712/">http://www.w3.org/TR/2012/WD-proximity-20120712/</a></dd>
+    
+    
+    <dt>Editors:</dt>
+    <dd><span>Anssi Kostiainen</span>, <a href="http://nokia.com/">Nokia</a></dd>
+<dd><span>Dzung D Tran</span>, <a href="http://intel.com/">Intel</a></dd>
+
+    
+  </dl>
+  
+  
+  
+  
+    
+      <p class="copyright">
+        <a href="http://www.w3.org/Consortium/Legal/ipr-notice#Copyright">Copyright</a> © 
+        2012
+        
+        <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>), 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"><h2>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"><h2>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/tip/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 Last Call Working Draft.
+          
+            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>).
+          The Last Call period ends 30 November 1899.
+          
+          All feedback is welcome.
+        </p>
+        
+          <p>
+            Publication as a Working Draft 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 is a Last Call Working Draft and thus the Working Group has determined that this document has satisfied the
+            relevant technical requirements and is sufficiently stable to advance through the Technical Recommendation process.
+          </p>
+        
+        <p>
+          
+            This document was produced by a group operating under the 
+            <a 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">Table of Contents</h2><ul class="toc"><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="#attributes" class="tocxref"><span class="secno">5.1 </span>Attributes</a></li><li class="tocline"><a href="#deviceproximityevent-interface" class="tocxref"><span class="secno">5.2 </span><span class="formerLink"><code>DeviceProximityEvent</code></span> Interface</a><ul class="toc"><li class="tocline"><a href="#attributes-1" class="tocxref"><span class="secno">5.2.1 </span>Attributes</a></li><li class="tocline"><a href="#dictionary-deviceproximityeventinit-members" class="tocxref"><span class="secno">5.2.2 </span>Dictionary <span class="formerLink"><code>DeviceProximityEventInit</code></span> Members</a></li><li class="tocline"><a href="#event-handlers" class="tocxref"><span class="secno">5.2.3 </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="#attributes-2" class="tocxref"><span class="secno">6.1 </span>Attributes</a></li><li class="tocline"><a href="#userproximityevent-interface" class="tocxref"><span class="secno">6.2 </span><span class="formerLink"><code>UserProximityEvent</code></span> Interface</a><ul class="toc"><li class="tocline"><a href="#attributes-3" class="tocxref"><span class="secno">6.2.1 </span>Attributes</a></li><li class="tocline"><a href="#dictionary-userproximityeventinit-members" class="tocxref"><span class="secno">6.2.2 </span>Dictionary <span class="formerLink"><code>UserProximityEventInit</code></span> Members</a></li><li class="tocline"><a href="#event-handlers-1" class="tocxref"><span class="secno">6.2.3 </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><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"><!--OddPage--><h2><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>
+    </section>
+    
+    <section id="terminology">
+      <!--OddPage--><h2><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> and
+        <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> 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>The concepts <dfn id="dfn-create-an-event">
+      <a href="http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#constructing-events">
+      create an event</a></dfn> and <dfn id="dfn-fire-an-event">
+      <a href="http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#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. 
+      </p>
+      <p>
+        The <dfn id="dfn-maximum-sensing-distance">maximum sensing distance</dfn> at which the sensor can detect
+        a physical object.
+      </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 id="security-and-privacy-considerations">
+      <!--OddPage--><h2><span class="secno">4. </span>Security and privacy considerations</h2>
+      <p>
+      </p>
+    </section>
+    
+    <section id="device-proximity">
+      <!--OddPage--><h2><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><section id="attributes"><h3><span class="secno">5.1 </span>Attributes</h3><dl class="attributes"><dt id="widl-Window-ondeviceproximity"><code>ondeviceproximity</code> of type <span class="idlAttrType"><a>EventHandler</a></span></dt><dd>
+        </dd></dl></section>
+      <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><span class="secno">5.2 </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="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>double</a></span> <span class="idlAttrName"><a href="#widl-DeviceProximityEvent-value">value</a></span>;</span>
+<span class="idlAttribute">    readonly attribute <span class="idlAttrType"><a>double</a></span> <span class="idlAttrName"><a href="#widl-DeviceProximityEvent-min">min</a></span>;</span>
+<span class="idlAttribute">    readonly attribute <span class="idlAttrType"><a>double</a></span> <span class="idlAttrName"><a href="#widl-DeviceProximityEvent-max">max</a></span>;</span>
+};<br><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></span></pre><section id="attributes-1"><h4><span class="secno">5.2.1 </span>Attributes</h4><dl class="attributes"><dt id="widl-DeviceProximityEvent-max"><code>max</code> of type <span class="idlAttrType"><a>double</a></span>, readonly</dt><dd>
+            The <a href="#dfn-maximum-sensing-distance" class="internalDFN">maximum sensing distance<strong></strong></a>.
+          </dd><dt id="widl-DeviceProximityEvent-min"><code>min</code> of type <span class="idlAttrType"><a>double</a></span>, readonly</dt><dd>
+            The <a href="#dfn-minimum-sensing-distance" class="internalDFN"> minimum sensing distance</a>.
+          </dd><dt id="widl-DeviceProximityEvent-value"><code>value</code> of type <span class="idlAttrType"><a>double</a></span>, readonly</dt><dd>
+            The <a href="#dfn-current-device-proximity" class="internalDFN">current device proximity</a>.
+          </dd></dl></section>
+        <section id="dictionary-deviceproximityeventinit-members"><h4><span class="secno">5.2.2 </span>Dictionary <a class="idlType" href="#idl-def-DeviceProximityEventInit"><code>DeviceProximityEventInit</code></a> Members</h4><dl class="dictionary-members"><dt id="widl-DeviceProximityEventInit-max"><code>max</code> of type <span class="idlMemberType"><a>double</a></span></dt><dd></dd><dt id="widl-DeviceProximityEventInit-min"><code>min</code> of type <span class="idlMemberType"><a>double</a></span></dt><dd></dd><dt id="widl-DeviceProximityEventInit-value"><code>value</code> of type <span class="idlMemberType"><a>double</a></span></dt><dd></dd></dl></section>
+        <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>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>
+          <li>
+            <a>Queue a task</a> to dispatch the newly created event at the
+            <a href="#idl-def-Window" class="idlType"><code>Window</code></a> object.
+          </li>
+        </ol>
+        <p>
+          When <a>the current proximity</a> changes, the <dfn id="dfn-user-agent-3">user
+          agent</dfn> <em class="rfc2119" title="must">must</em> <a href="#dfn-fire-a-device-proximity-event" class="internalDFN">fire a device proximity event</a>.
+        </p>
+        <div class="note"><div class="note-title"><span>Note</span></div><div class="">
+          The definition of granularity i.e. how often the event is fired is
+          left to the implementation. Implementations may fire the event if
+          they have reason to believe that the page does not have sufficiently
+          fresh data. Different devices may 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 the are only interested in finding out if the user is
+          near or far.
+        </div></div>
+        <section id="event-handlers">
+          <h4><span class="secno">5.2.3 </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 <code>Window</code> 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><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><section id="attributes-2"><h3><span class="secno">6.1 </span>Attributes</h3><dl class="attributes"><dt id="widl-Window-onuserproximity"><code>onuserproximity</code> of type <span class="idlAttrType"><a>EventHandler</a></span></dt><dd>
+        </dd></dl></section>
+      <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><span class="secno">6.2 </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="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>
+};<br><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></span></pre><section id="attributes-3"><h4><span class="secno">6.2.1 </span>Attributes</h4><dl class="attributes"><dt id="widl-UserProximityEvent-near"><code>near</code> of type <span class="idlAttrType"><a>boolean</a></span>, readonly</dt><dd>
+            The <a href="#dfn-current-user-proximity-state" class="internalDFN">current user proximity state</a>.
+          </dd></dl></section>
+        <section id="dictionary-userproximityeventinit-members"><h4><span class="secno">6.2.2 </span>Dictionary <a class="idlType" href="#idl-def-UserProximityEventInit"><code>UserProximityEventInit</code></a> Members</h4><dl class="dictionary-members"><dt id="widl-UserProximityEventInit-near"><code>near</code> of type <span class="idlMemberType"><a>boolean</a></span></dt><dd></dd></dl></section>
+        <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>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>
+          <li>
+            <a>Queue a task</a> to dispatch the newly created event at the
+            <a href="#idl-def-Window" class="idlType"><code>Window</code></a> object.
+          </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> <a href="#dfn-fire-a-user-proximity-event" class="internalDFN">fire a user proximity event</a>.
+        </p>
+        <section id="event-handlers-1">
+          <h4><span class="secno">6.2.3 </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 <code>Window</code> 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><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"><!--OddPage--><h2><span class="secno">B. </span>References</h2><section id="normative-references"><h3><span class="secno">B.1 </span>Normative references</h3><dl class="bibliography"><dt id="bib-DOM4">[DOM4]</dt><dd>Anne van Kesteren; Aryeh Gregor; Ms2ger. <a href="http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html/"><cite>DOM4.</cite></a> URL: <a href="http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html/">http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html/</a> 
+</dd><dt id="bib-HTML5">[HTML5]</dt><dd>Ian Hickson; David Hyatt. <a href="http://www.w3.org/TR/html5"><cite>HTML5.</cite></a> 29 March 2012. W3C Working Draft. (Work in progress.) URL: <a href="http://www.w3.org/TR/html5">http://www.w3.org/TR/html5</a> 
+</dd><dt id="bib-RFC2119">[RFC2119]</dt><dd>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></dl></section></section></body></html>
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