- From: poot <cvsmail@w3.org>
- Date: Wed, 16 Jul 2008 10:40:55 +0900 (JST)
- To: public-html-diffs@w3.org
First draft of the 'inside workers' section. (whatwg r5) (changed by:
Ian Hickson)
Diffs for this change per section:
References
http://people.w3.org/mike/diffs/html5/workers/Overview.1.4.html#references
2.2 The queue of events
http://people.w3.org/mike/diffs/html5/workers/Overview.1.4.html#the-queue
kill a worker
http://people.w3.org/mike/diffs/html5/workers/Overview.1.4.html#kill-a
1.2 Requirements
http://people.w3.org/mike/diffs/html5/workers/Overview.1.4.html#requirements
1. Introduction
http://people.w3.org/mike/diffs/html5/workers/Overview.1.4.html#introduction
Editor's Draft 16 July 2008
http://people.w3.org/mike/diffs/html5/workers/Overview.1.4.html#editors
2.1 The WindowWorker interface
http://people.w3.org/mike/diffs/html5/workers/Overview.1.4.html#the-windowworker
live
http://people.w3.org/mike/diffs/html5/workers/Overview.1.4.html#live
1.1 Tutorial
http://people.w3.org/mike/diffs/html5/workers/Overview.1.4.html#tutorial
WindowWorker
http://people.w3.org/mike/diffs/html5/workers/Overview.1.4.html#windowworker
1.3 Conformance requirements
http://people.w3.org/mike/diffs/html5/workers/Overview.1.4.html#conformance
3. Creating workers
http://people.w3.org/mike/diffs/html5/workers/Overview.1.4.html#creating
2.3 Processing model
http://people.w3.org/mike/diffs/html5/workers/Overview.1.4.html#processing
run a worker
http://people.w3.org/mike/diffs/html5/workers/Overview.1.4.html#run-a
1.3.1 Dependencies
http://people.w3.org/mike/diffs/html5/workers/Overview.1.4.html#dependencies
Acknowledgements
http://people.w3.org/mike/diffs/html5/workers/Overview.1.4.html#acknowledgements
2. Inside workers
http://people.w3.org/mike/diffs/html5/workers/Overview.1.4.html#inside
queue of events
http://people.w3.org/mike/diffs/html5/workers/Overview.1.4.html#queue
An accompaniment specification for HTML5
http://people.w3.org/mike/diffs/html5/workers/Overview.1.4.html#an-accompaniment
closing
http://people.w3.org/mike/diffs/html5/workers/Overview.1.4.html#closing
1.4 Terminology
http://people.w3.org/mike/diffs/html5/workers/Overview.1.4.html#terminology
Current content per affected section:
http://dev.w3.org/html5/workers/Overview.html#references
http://dev.w3.org/html5/workers/Overview.html#the-queue
http://dev.w3.org/html5/workers/Overview.html#relationships
http://dev.w3.org/html5/workers/Overview.html#kill-a
http://dev.w3.org/html5/workers/Overview.html#requirements
http://dev.w3.org/html5/workers/Overview.html#introduction
http://dev.w3.org/html5/workers/Overview.html#editors
http://dev.w3.org/html5/workers/Overview.html#the-windowworker
http://dev.w3.org/html5/workers/Overview.html#live
http://dev.w3.org/html5/workers/Overview.html#tutorial
http://dev.w3.org/html5/workers/Overview.html#windowworker
http://dev.w3.org/html5/workers/Overview.html#conformance
http://dev.w3.org/html5/workers/Overview.html#creating
http://dev.w3.org/html5/workers/Overview.html#relationship
http://dev.w3.org/html5/workers/Overview.html#processing
http://dev.w3.org/html5/workers/Overview.html#run-a
http://dev.w3.org/html5/workers/Overview.html#dependencies
http://dev.w3.org/html5/workers/Overview.html#background
http://dev.w3.org/html5/workers/Overview.html#acknowledgements
http://dev.w3.org/html5/workers/Overview.html#relationship0
http://dev.w3.org/html5/workers/Overview.html#inside
http://dev.w3.org/html5/workers/Overview.html#queue
http://dev.w3.org/html5/workers/Overview.html#an-accompaniment
http://dev.w3.org/html5/workers/Overview.html#closing
http://dev.w3.org/html5/workers/Overview.html#terminology
Previously published WD content per affected section:
http://www.w3.org/TR/2008/WD-html5-20080610/single-page/#references
http://www.w3.org/TR/2008/WD-html5-20080610/single-page/#the-queue
http://www.w3.org/TR/2008/WD-html5-20080610/single-page/#relationships
http://www.w3.org/TR/2008/WD-html5-20080610/single-page/#kill-a
http://www.w3.org/TR/2008/WD-html5-20080610/single-page/#requirements
http://www.w3.org/TR/2008/WD-html5-20080610/single-page/#introduction
http://www.w3.org/TR/2008/WD-html5-20080610/single-page/#editors
http://www.w3.org/TR/2008/WD-html5-20080610/single-page/#the-windowworker
http://www.w3.org/TR/2008/WD-html5-20080610/single-page/#live
http://www.w3.org/TR/2008/WD-html5-20080610/single-page/#tutorial
http://www.w3.org/TR/2008/WD-html5-20080610/single-page/#windowworker
http://www.w3.org/TR/2008/WD-html5-20080610/single-page/#conformance
http://www.w3.org/TR/2008/WD-html5-20080610/single-page/#creating
http://www.w3.org/TR/2008/WD-html5-20080610/single-page/#relationship
http://www.w3.org/TR/2008/WD-html5-20080610/single-page/#processing
http://www.w3.org/TR/2008/WD-html5-20080610/single-page/#run-a
http://www.w3.org/TR/2008/WD-html5-20080610/single-page/#dependencies
http://www.w3.org/TR/2008/WD-html5-20080610/single-page/#background
http://www.w3.org/TR/2008/WD-html5-20080610/single-page/#acknowledgements
http://www.w3.org/TR/2008/WD-html5-20080610/single-page/#relationship0
http://www.w3.org/TR/2008/WD-html5-20080610/single-page/#inside
http://www.w3.org/TR/2008/WD-html5-20080610/single-page/#queue
http://www.w3.org/TR/2008/WD-html5-20080610/single-page/#an-accompaniment
http://www.w3.org/TR/2008/WD-html5-20080610/single-page/#closing
http://www.w3.org/TR/2008/WD-html5-20080610/single-page/#terminology
Cumulative diff: http://people.w3.org/mike/diffs/html5/workers/Overview.diff.html
http://dev.w3.org/cvsweb/html5/workers/Overview.html?r1=1.3&r2=1.4&f=h
http://html5.org/tools/web-apps-tracker?from=4&to=5
===================================================================
RCS file: /sources/public/html5/workers/Overview.html,v
retrieving revision 1.3
retrieving revision 1.4
diff -u -d -r1.3 -r1.4
--- Overview.html 10 Jul 2008 01:10:39 -0000 1.3
+++ Overview.html 16 Jul 2008 01:39:59 -0000 1.4
@@ -19,7 +19,7 @@
specification for HTML5</h2>
<h2 class="no-num no-toc" id=editors><!-- "W3C Working Draft" --> Editor's
- Draft <!--ZZZ-->10 July 2008</h2>
+ Draft <!--ZZZ-->16 July 2008</h2>
<dl><!-- ZZZ: update the month/day
<dt>This Version:</dt>
@@ -144,7 +144,7 @@
<p>The W3C <a href="http://www.w3.org/html/wg/">HTML Working Group</a> is
the W3C working group responsible for this specification's progress along
- the W3C Recommendation track. <!--ZZZ:--> This specification is the 10
+ the W3C Recommendation track. <!--ZZZ:--> This specification is the 16
July 2008 <!--ZZZ "Working Draft"-->Editor's Draft. <!--:ZZZ--></p>
<!-- UNDER NO CIRCUMSTANCES IS THE PRECEDING PARAGRAPH TO BE REMOVED OR EDITED WITHOUT TALKING TO IAN FIRST -->
<!-- relationship to other work (required) -->
@@ -181,31 +181,35 @@
<ul class=toc>
<li><a href="#introduction"><span class=secno>1. </span>Introduction</a>
<ul class=toc>
- <li><a href="#background"><span class=secno>1.1 </span>Background</a>
+ <li><a href="#tutorial"><span class=secno>1.1 </span>Tutorial</a>
<li><a href="#requirements"><span class=secno>1.2
</span>Requirements</a>
- <li><a href="#relationships"><span class=secno>1.3 </span>Relationships
- to other specifications</a>
- <ul class=toc>
- <li><a href="#relationship"><span class=secno>1.3.1
- </span>Relationship to HTML5</a>
-
- <li><a href="#relationship0"><span class=secno>1.3.2
- </span>Relationship to ECMAScript</a>
- </ul>
-
- <li><a href="#conformance"><span class=secno>1.4 </span>Conformance
+ <li><a href="#conformance"><span class=secno>1.3 </span>Conformance
requirements</a>
<ul class=toc>
- <li><a href="#dependencies"><span class=secno>1.4.1
+ <li><a href="#dependencies"><span class=secno>1.3.1
</span>Dependencies</a>
</ul>
- <li><a href="#terminology"><span class=secno>1.5 </span>Terminology</a>
+ <li><a href="#terminology"><span class=secno>1.4 </span>Terminology</a>
</ul>
+ <li><a href="#inside"><span class=secno>2. </span>Inside workers</a>
+ <ul class=toc>
+ <li><a href="#the-windowworker"><span class=secno>2.1 </span>The
+ <code>WindowWorker</code> interface</a>
+
+ <li><a href="#the-queue"><span class=secno>2.2 </span>The queue of
+ events</a>
+
+ <li><a href="#processing"><span class=secno>2.3 </span>Processing
+ model</a>
+ </ul>
+
+ <li><a href="#creating"><span class=secno>3. </span>Creating workers</a>
+
<li class=no-num><a href="#references">References</a>
<li class=no-num><a href="#acknowledgements">Acknowledgements</a>
@@ -216,10 +220,12 @@
<h2 id=introduction><span class=secno>1. </span>Introduction</h2>
- <h3 id=background><span class=secno>1.1 </span>Background</h3>
+ <h3 id=tutorial><span class=secno>1.1 </span>Tutorial</h3>
<p><em>This section is non-normative.</em>
+ <p class=big-issue>This section is missing.
+
<h3 id=requirements><span class=secno>1.2 </span>Requirements</h3>
<p><em>This section is non-normative.</em>
@@ -270,19 +276,7 @@
should be able to detect this is about to happen and exit gracefully.
</ul>
- <h3 id=relationships><span class=secno>1.3 </span>Relationships to other
- specifications</h3>
-
- <h4 id=relationship><span class=secno>1.3.1 </span>Relationship to HTML5</h4>
-
- <p><em>This section is non-normative.</em>
-
- <h4 id=relationship0><span class=secno>1.3.2 </span>Relationship to
- ECMAScript</h4>
-
- <p><em>This section is non-normative.</em>
-
- <h3 id=conformance><span class=secno>1.4 </span>Conformance requirements</h3>
+ <h3 id=conformance><span class=secno>1.3 </span>Conformance requirements</h3>
<p>All diagrams, examples, and notes in this specification are
non-normative, as are all sections explicitly marked non-normative.
@@ -318,7 +312,7 @@
against running out of memory, or to work around platform-specific
limitations.
- <h4 id=dependencies><span class=secno>1.4.1 </span>Dependencies</h4>
+ <h4 id=dependencies><span class=secno>1.3.1 </span>Dependencies</h4>
<p>This specification relies on several other underlying specifications.
@@ -342,7 +336,7 @@
specification. <a href="#refsWebIDL">[WebIDL]</a></p>
</dl>
- <h3 id=terminology><span class=secno>1.5 </span>Terminology</h3>
+ <h3 id=terminology><span class=secno>1.4 </span>Terminology</h3>
<p>For simplicity, terms such as <em>shown</em>, <em>displayed</em>, and
<em>visible</em> might sometimes be used when referring to the way a
@@ -350,9 +344,10 @@
visual medium; they must be considered to apply to other media in
equivalent ways.
- <p>The construction "a <code>Foo</code> object", where <code>Foo</code> is
- actually an interface, is sometimes used instead of the more accurate "an
- object implementing the interface <code>Foo</code>".
+ <p>The construction "a <code title="">Foo</code> object", where <code
+ title="">Foo</code> is actually an interface, is sometimes used instead of
+ the more accurate "an object implementing the interface <code
+ title="">Foo</code>".
<p>The term DOM is used to refer to the API set made available to scripts
in Web applications, and does not necessarily imply the existence of an
@@ -370,6 +365,132 @@
that object must operate on the actual underlying data, not a snapshot of
the data.
+ <h2 id=inside><span class=secno>2. </span>Inside workers</h2>
+
+ <h3 id=the-windowworker><span class=secno>2.1 </span>The <code><a
+ href="#windowworker">WindowWorker</a></code> interface</h3>
+
+ <pre
+ class=idl>[NoInterfaceObject] interface <dfn id=windowworker>WindowWorker</dfn> {
+ readonly attribute boolean <a href="#closing" title=dom-windowworker-closing>closing</a>;
+};</pre>
+
+ <p>Objects that implement the <code><a
+ href="#windowworker">WindowWorker</a></code> interface must also implement
+ the <code>Window</code> interface (and thus also the
+ <code>WindowTimers</code> interface) and the <code>EventTarget</code>
+ interface.
+
+ <p>The <dfn id=closing
+ title=dom-windowworker-closing><code>closing</code></dfn> attribute must
+ return false until the "<a href="#kill-a">kill a worker</a>" processing
+ model defined below sets it to false.
+
+ <h3 id=the-queue><span class=secno>2.2 </span>The queue of events</h3>
+
+ <p>Each <code><a href="#windowworker">WindowWorker</a></code> object is
+ asssociated with a <dfn id=queue>queue of events</dfn>, which is initially
+ empty.
+
+ <p>An event in the queue can be a DOM event or a timeout callback.
+
+ <h3 id=processing><span class=secno>2.3 </span>Processing model</h3>
+
+ <p>When a user agent is to <dfn id=run-a>run a worker</dfn> for a script
+ <var title="">script</var> and a browsing context <var title="">owner
+ browsing context</var> and a <code>Document</code> <var title="">owner
+ document</var>, it must run the following steps in a completely separate
+ and parallel execution environment:
+
+ <ol>
+ <li>
+ <p>Create a new <code><a href="#windowworker">WindowWorker</a></code>
+ object, <var title="">window</var>.</p>
+
+ <li>
+ <p>Let <var title="">script</var>'s <span>script execution context</span>
+ (and thus also <span>global object</span>) be <var
+ title="">window</var>.</p>
+
+ <li>
+ <p>Let <var title="">script</var>'s <span>script browsing context</span>
+ be <var title="">owner browsing context</var>.</p>
+
+ <li>
+ <p>Let <var title="">script</var>'s <span>script document context</span>
+ be <var title="">owner document</var>.</p>
+
+ <li>
+ <p>Run <var title="">script</var> until it returns.</p>
+
+ <li>
+ <p><i>Event loop</i>: Wait until there is an event in the <a
+ href="#queue">queue of events</a> associated with <var
+ title="">window</var>.</p>
+
+ <li>
+ <p>Dispatch the oldest event or callback in the <a href="#queue">queue of
+ events</a>. Events must be targetted at the <code><a
+ href="#windowworker">WindowWorker</a></code> object.</p>
+
+ <li>
+ <p>If there are any more events in the <a href="#queue">queue of
+ events</a> or if the <var title="">window</var> object's <code
+ title=dom-windowworker-closing><a href="#closing">closing</a></code>
+ attribute is set to false, then jump back to the step above labeled
+ <i>event loop</i>.</p>
+
+ <li>
+ <p class=big-issue>timers, intervals, XMLHttpRequests, database
+ transactions, etc, must be killed; ports must be deactivated and
+ unentangled</p>
+ </ol>
+
+ <hr>
+
+ <p>When a user agent is to <dfn id=kill-a>kill a worker</dfn>, it must run
+ the following steps in parallel with the worker's main loop (the "<a
+ href="#run-a">run a worker</a>" processing model defined above):
+
+ <ol>
+ <li>
+ <p>Set the worker's <code><a href="#windowworker">WindowWorker</a></code>
+ object's <code title=dom-windowworker-closing><a
+ href="#closing">closing</a></code> attribute to true.
+
+ <li>
+ <p>Create an <code>Event</code> object with the event name <code
+ title=event-unload>unload</code>, which does not bubble and is not
+ cancelable, and add it to the worker's <code><a
+ href="#windowworker">WindowWorker</a></code> object's <a
+ href="#queue">queue of events</a>.
+
+ <li>
+ <p>Wait a user-agent-defined amount of time.
+
+ <li>
+ <p>If there are any events in the <a href="#queue">queue of events</a>
+ other than the <code title=event-unload>unload</code> event that this
+ algorithm just added, discard them without dispatching them.
+
+ <li>
+ <p>If the <code title=event-unload>unload</code> event that this
+ algorithm just added hasn't yet been dispatched, then abort the script
+ currently running in the worker.
+
+ <li>
+ <p>Wait a user-agent-defined amount of time.
+
+ <li>
+ <p>Abort the script currently running in the worker (if any script is
+ running, then it will be a handler for the <code
+ title=event-unload>unload</code> event).
+ </ol>
+
+ <h2 id=creating><span class=secno>3. </span>Creating workers</h2>
+
+ <p class=big-issue>...
+
<h2 class=no-num id=references>References</h2>
<p class=big-issue>This section will be written in a future
@@ -380,3 +501,6 @@
<p>Thanks to Maciej Stachowiak and Mike Smith for their useful and
substantial comments.
+
+ <p>Huge thanks to the whole Gears team, who pioneered this technology and
+ whose experience has been a huge influence on this specification.
Received on Wednesday, 16 July 2008 01:41:38 UTC