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video9a.html
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<!-- THIS FILE BEGAN AS A COPY OF video/video8a.html.
It has been transformed into the true html file for the implements part 1 video.
-->
<!DOCTYPE html>
<html>
<head>
<!--************************************************************************
* The following imported JavaScript code is involved in copying text into *
* the copy buffer and was obtained from *
* *
* https://clipboardjs.com/ *
* *
* Note that the directory /dist that contains the clipboard.min.js file *
* must be moved to the right place and the src address corrected. *
*************************************************************************-->
<script src="dist/clipboard.min.js">
</script>
<script>
/***************************************************************************
* DATA FOR THE LECTURE *
* *
* The following data customizes the page for a particular video. *
***************************************************************************/
/***************************************************************************
* The name of the lecture. *
***************************************************************************/
var HEADING = "The Alternating Bit Protocol - Part 1" ;
/***************************************************************************
* Table of Contents *
* *
* Specified by an array, each element of which is a two-element array A *
* with A[0] the name of a section and A[1] the time in seconds at which *
* the section of the video begins. *
***************************************************************************/
var tocData =
[["Prologue", 4],
["Finite Sequences", 44.5],
["What the Protocol Should Accomplish", 338.5],
["The High Level Spec", 472.3],
["Safety and Liveness", 680.3],
["Weak Fairness", 910.75],
["Adding Liveness to a Specification", 1060.5],
["Epilogue", 1215]
] ;
/***************************************************************************
* Items Displayed at Specified Times *
* *
* An array that specifies when items are to be displayed in the Bottom *
* Section of the page. Each element of the array is 3-element array A *
* where A[0] is the id of the item, which is to be displayed from time *
* A[1] through A[2] (in seconds) of the video. *
* *
* The the same id should not appear twice in the ids the elements of *
* timingData, and each of those ids should be the same as the id of one *
* of the <div> elements in in the Bottom Section of the page, which are *
* children the <div> element with id "afterVideo". *
* *
* Note: Putting something at the very end isn't a great idea because on *
* IE, if the user seeks to the end of the video, IE acts as if it's at *
* the beginning and doesn't display something that comes at the end. *
***************************************************************************/
var timingData =
[["begin-title", 0, 4],
["copy-spec", 243, 251],
["download-spec", 622, 626],
["copy-formula", 1136, 1139.2],
["end-title", 1243, 2000]
] ;
</script>
<script src=tlavideo.js> </script>
<title id="titleId"></title> <!-- title set by createHeading() -->
<!-- The following loads the style sheet for the html files of the videos -->
<link rel="stylesheet" type="text/css" href="tlastyles.css">
</head>
<body onresize="getVideoMag()">
<!--************************************************************************
* The body consists of the following sections: *
* - The heading section. *
* - The video section. *
* - The bottom section. *
*************************************************************************-->
<!--************************************************************************
* The Heading Section *
* *
* It consists of a single <div> element with id "headingId". It contains *
* the name of the lecture. This section is made invisible when the *
* video is in normal playing mode - that is, with videoState = "playing" *
* and timedItemDue = "false". *
*************************************************************************-->
<div id="headingId" style="display:block">
<!-- The lecture name. -->
<div style="float:left;width:450px">
<H1 id="h1Id" style="margin-top:0em;margin-bottom:.5em">
</H1>
</div>
<script> createHeading() </script>
</div>
<!--************************************************************************
* The Video Section *
* *
* This is a <div> item containing two subitems: a <video> item that *
* displays the video and a <div> item that contains the following items: *
* *
* - The controls for the video's playing size. *
* - Controls for skipping backwards and forwards in the video. *
*************************************************************************-->
<div style="display:block;clear:left">
<!--*********************************************************************
* The <video> element. *
**********************************************************************-->
<video onpause="pauseEvent()"
onplay="playEvent()"
onfocus="videoGetsFocus()"
width=450
height=256
controls
preload = "auto"
id="videoId">
<!--********************************************************************
* The src field of the following <source> tag is the URL of the video. *
*********************************************************************-->
<!-- Here is the local copy of the video.
<source src= "video9a.mp4">
-->
<!-- Here is the copy of the video on Channel 9
<source
src="video9a.mp4">
-->
<!-- here is the copy provided by Golnaz Alibeigi -->
<source
src="video9a.mp4">
Your browser cannot display this tutorial because it does not
support the video HTML tag.
</video>
<!--*********************************************************************
* A <div> containing items displayed on a line below the video. *
* *
* One possibility is to remove the controls from the video itself and *
* replace them with the items displayed here plus some other controls. *
* The controls could also be moved to be on top of the video, and to *
* be made visible for a few seconds when the mouse is moved over (and *
* perhaps out of) the video. This would make it possible to prevent *
* the user from putting the video into full-screen mode. *
**********************************************************************-->
<div id="below-video">
<!--*******************************************************************
* A span for showing the controls for skipping forward and back in *
* the video and the "Speed", "Contents" and "How to View" buttons. *
* It is created by a tlavideo.jss function. *
********************************************************************-->
</div>
</div>
<!--************************************************************************
* The Bottom Section *
* *
* A <div> HTML element with id "afterVideo". It normally contains the *
* table of contents when the video is not in normal playing mode. *
* However, at certain parts of the video, it will be replaced by material *
* relevant to that part. That material will consist of a sequence of *
* <div> elements, identified by their ids. *
* *
* The sequence of <div> elements consists of one with id "tocId" followed *
* by a sequence of elements whose ids are in 1-1 correspondence with the *
* ids in timingData. *
*************************************************************************-->
<div id="afterVideo" style="display:block">
<!--*********************************************************************
* A <div> element containing the table of contents, which is created *
* dynamically by the createContents JavaScript function *
**********************************************************************-->
<div id="tocId" style="float:left"></div>
<script> createContents("tocId", tocData) ; </script>
</div>
<div id="rightBottom" style="display:block" >
<!--********************************************************************
* Next comes the sequence of items that are to appear, with the video *
* minimized, at certain points in the video. The timingData variable *
* specifies at what point in the video they appear. *
*********************************************************************-->
<!--*********************************************************************
* This is the call-out to appear at the beginning of the video. *
**********************************************************************-->
<div id = "begin-title" style="float:left">
<div style =
"float:left;margin-left:-20px;font-size:20px;font-family:Calibri">
<h3 class="contents">Lecture 9 - Part 1</h3>
<p style="margin-left:2em;margin-top:-1em;width:15em">
This web page was written on:<br>
30 August 2021<BR><BR>
The video was produced on:<br>
7 December 2017
</p>
</div>
<div id = "item0a" style = "float:left;margin-left:-4em">
<script> createContents("item0a", tocData) ;
</script>
</div>
</div>
<!--********************************************************************
* The "What's wrong with first FillSmall definition" call-out. *
*********************************************************************-->
<!--
<div id = "whats-wrong" style="float:left">
<div style =
"float:left;margin-left:30px;font-size:30px;font-family:Calibri">
<p>
Type a space to stop the video.
</p>
</div>
</div>
-->
<!--********************************************************************
* The "Copy Spec" call-out. *
*********************************************************************-->
<div id = "copy-spec" style="float:left; margin-top:20px">
<font style="font-size:17px;font-family:sans-serif">
<div style="width:420px;float:left;margin-left:25px">
Copy the following tiny text, either by
clicking on the <code>Copy</code>
button below it, or by your usual method of copying
text.
<div style="padding-left:5em;padding-top:.5em">
<pre class="copyBigText" id="bar">
EXTENDS Integers, Sequences
Remove(i, seq) ==
[j \in 1..(Len(seq)-1) |-> IF j < i THEN seq[j]
ELSE seq[j+1]]
</pre>
<button class="btn" data-clipboard-target="#bar">
Copy Text
</button>
</div>
</div>
</font>
</div>
<!--********************************************************************
* The "Download Spec" call-out. *
*********************************************************************-->
<div id = "download-spec" style="float:left">
<div style =
"float:left;margin-top:-5px;margin-left:20px;font-size:25px;font-family:Calibri">
<p>
Stop the video and right-click on the<br> following link
to download the file:<br>
<A href="ABSpec.tla">ABSpec.tla</a>
</p>
</div>
</div>
<!--********************************************************************
* The "Copy Formula" call-out. *
*********************************************************************-->
<div id = "copy-formula" style="float:left; margin-top:20px">
<font style="font-size:17px;font-family:sans-serif">
<div style="width:420px;float:left;margin-left:25px">
Copy the following tiny text, either by
clicking on the <code>Copy</code>
button below it, or by your usual method of copying
text.
<div style="padding-left:5em;padding-top:.5em">
<pre class="copyBigText" id="bar2">
\A v \in Data \X {0,1} : (AVar = v) ~> (BVar = v)
</pre>
<button class="btn" data-clipboard-target="#bar2">
Copy Text
</button>
</div>
</div>
</font>
</div>
<!--
<div style="float:left;width:20em;padding-left:3em">
Stop the video and copy this specification, either by
clicking on the button or by the usual way of copying
text. If you
paste it into a model editor in the Toolbox, it will appear
in a normal size. If you paste it into another text editor,
you may have to
increase the text's font size to make it readable.
</div>
</font>
-->
</div>
<!-- HERE IS AN EXAMPLE OF OPENING A VIDEO IN A NEW WINDOW
<div id="item2" style="position:relative; top:1em;left:4em">
<div style="text-align:left;width:30em">
<font style="font-size:19px;font-family:sans-serif">
<A href="summary-standalone.pdf" target=_blank>
<b>The TLA+ "Cheat Sheet"</b></font>
</A>
<p style="font-size:18px;font-family:sans-serif">
Left-click to open it in a new window,
or right-click <br> and select
<i>Save as ...</i>
to download it.
</p>
</div>
</div>
-->
<!--**********************************************************************
* This is the end of the sequence of <div> items that are to be *
* displayed at specified points in the video. *
***********************************************************************-->
<!--*********************************************************************
* The display at the end of the video. *
**********************************************************************-->
<div id = "end-title" style="float:left">
<div id = "item0b" style = "float:left">
<script> createContents("item0b", tocData) ; </script>
</div>
<div style =
"float:left;margin-left:10px;font-size:20px;font-family:Calibri">
<h3 class="contents"> The Next Video</h3>
<p style="margin-left:2em;margin-top:1em;width:15em">
<A href="video9b.html">The Alternating Bit Protocol - Part 2</a>
</p>
</div>
</div>
</div>
</body>
</html>