Re: [w3c/gamepad] Add algorithms for getGamepads and events (#151)

@nondebug commented on this pull request.



> @@ -258,6 +295,81 @@ <h2>
           different values (or values in a different order).
         </dd>
       </dl>
+      <h3>Receiving new input values</h3>
+      <p>
+        When the system receives new input values from a gamepad, run the following steps:
+      </p>
+      <ol>
+        <li>Let |gamepad:Gamepad| be the {{Gamepad}} instance in |navigator:Navigator|.{{[[gamepads]]}} representing the gamepad.
+        <li>Let |axisValues:sequence&lt;unsigned long&gt;| be the gamepad's <a>ordered array of logical axis input values</a>.
+        <li>Let |buttonValues:sequence&lt;unsigned long&gt;| be the gamepad's <a>ordered array of logical button input values</a>.
+        <li>Queue a task (where?) to <a>update gamepad state</a> for |gamepad| with |axisValues| and |buttonValues|.
+      </ol>
+      To <dfn>update gamepad state</dfn> for |gamepad| with an <a>ordered array of logical axis input values</a> |axisValues:sequence&lt;unsigned long&gt;| and an <a>ordered array of logical button input values</a> |buttonValues:sequence&lt;unsigned long&gt;|, run the following steps:
+      <ol>
+        <li>Let |now:DOMHighResTimeStamp| be a {{DOMHighResTimeStamp}} representing the current time.
+        <li>Let |gamepadsStart:DOMHighResTimeStamp| be the |navigationStart:DOMHighResTimeStamp| attribute of the {{PerformanceTiming}} interface.
+        <li>Set |gamepad|.{{Gamepad/timestamp}} to |now| − |gamepadsStart|.

I added the warning to the timestamp attribute definition

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