Hi everyone,
Attached is a function called "Sequence." It allows the user to
(ideally through aliases) set up a sequence of sites to come up one
after the other in the same browser window. Users can have the sites
come up after a specified amount of time, or after clicking on a confirm
dialog box. Admittedly, testing has been limited to my one XP computer,
so please feel free to make modifications if necessary. Also, the
confirm dialog box is a bit of an ugly solution, so if anyone is
interested in making a more elegant (but equally functional) mechanism,
I would certainly lend a hand.
Would one of you administrators mind adding this to the source if the
group deems it worthy? I apologize for no longer having any CVS tools
set up. Let me know if you wish me to send this in as an attachment.
Thanks,
Neel
<search function="sequence">
<name>Sequence</name>
<description>
Sequence will load a number of sites in one browser window in
sequence. The arguments are all urls to web pages.<br/>
<div class="helpboxDescLabels">Usage:</div>
<table class="helpboxDescTable">
<tr><td>Set</td><td> - </td><td>sequence
<<i>search1</i>><br/> [<<i>search2</i>> [...]]<br/>
/frequency:<<i>frequency</i>>
/repeat:<<i>number</i>></td></tr>
<tr><td>Cancel</td><td> - </td><td>sequence cancel</td></tr>
</table>
<div class="helpboxDescLabels">Switches:</div>
<table class="helpboxDescTable">
<tr><td>/frequency:<<i>seconds or
ask</i>></td><td> - </td><td>Number of seconds between switches.
Frequency of "0" will ask the user before switching. (default =
0)</td></tr>
<tr><td>/repeat:<<i>number</i>></td><td> -
</td><td>Number of times to repeat the sequence. (default = 1, 0 =
forever)</td></tr>
</table>
<div class="helpboxDescLabels">Example:</div>
<table class="helpboxDescTable">
<tr><td>sequence http://www.gymamerica.com
http://www.whitehouse.gov</td></tr>
</table>
</description>
<category>Functions</category>
<contributor>Neel Doshi</contributor>
<script><![CDATA[
// Array used to keep track of sequence commands that are pending
completion
sequenceTracker = new Array();
function sequenceURLLoad(url_array, freq, repeat, sequence_code,
sequence_target)
{
// The repeat parameter is really the parameter the user entered
multiplied by the number of
// URLS in the array. This is done by the calling function.
// When the function calls itself the url_array is
passed as a string
// otherwise it is passed as an array.
if (typeof url_array == 'string')
url_array = url_array.split(',');
// Move the URL in the url_array from the top to the
bottom.
var strURL = url_array.shift();
url_array.push(strURL);
// Open the URL in a browser window.
// Note: I am using window.open because I do not know
of another
// way to ensure opening the page in the same window
everytime.
// For some reasons, certain sites seem to break this
bit of functionality
// i.e. www.nytimes.com.
window.open(strURL, sequence_target);
// See if the function should be called again.
if (--repeat == 0)
{
if (typeof sequenceTimeout != 'undefined')
{
clearInterval(sequenceTimeout);
delete sequenceTracker[sequence_code];
}
return false;
}
else
{
// if the frequency is 0, ask the user if he
wants to continue:
if (freq == 0)
if(confirm("Click OK when you want to
load " + url_array[0] + "\nClick Cancel to cancel this sequence") ==
false)
{
if (typeof sequenceTimeout !=
'undefined')
{
clearInterval(sequenceTimeout);
}
delete
sequenceTracker[sequence_code];
return true;
}
// otherwise use the frequency.
var strTimeout = "sequenceURLLoad('" + url_array
+ "', '" + freq + "', '" + repeat + "', '" + sequence_code + "', '" +
sequence_target + "');";
sequenceTimeout = setTimeout(strTimeout, freq *
1000);
sequenceTracker[sequence_code] =
sequenceTimeout;
}
return true;
}
function sequence(q)
{
var sequence_base = 1;
if (nullArgs("sequence", q))
return false;
// First parse the arguments
var args = parseArgs(q, "frequency, repeat");
var freq = 0;
var repeat = 1;
// set defaults if necessary
if (typeof args.switch_val["frequency"] != 'undefined')
{
freq = args.switch_val["frequency"];
}
if (typeof args.switch_val["repeat"] != 'undefined')
{
repeat = args.switch_val["repeat"];
}
// Create an array with the URLS in them.
// Make sure to add the http:// if necessary.
var url_array = args.q.split(' ');
// Check to see if the user wants to cancel a sequence.
if (url_array[0] == 'cancel')
{
// The member wants to cancel a particular
sequence
var sequence_code;
if (typeof url_array[1] == 'undefined')
{
url_array[1] = sequence_base;
sequence_code = "";
}
else
sequence_code = url_array[1] + " ";
if (typeof sequenceTracker[url_array[1]] !=
'undefined')
{
clearInterval(sequenceTracker[url_array[1]]);
delete sequenceTracker[url_array[1]];
document.deff.q.value = "Sequence " +
sequence_code + "canceled!";
setTimeout("document.deff.q.value='';",1000);
return true;
}
else
{
alert("Sequence code " + sequence_code +
" not found!");
return false;
}
}
for ( var j = 0; j < url_array.length; j++ )
{
url_array[j] = isURL(url_array[j]);
if (url_array[j] == false)
{
alert("Only properly formatted URLs are
allowed. Please try again.");
return false;
}
}
// Generate a sequence code and target name
// The purpose of the sequencecode is to allow the user to
cancel a
// sequence once it has begun. The sequenceTracker array will
keep track of
// all of the active sequences and associate a sequence code
to a setTimeout handle
// so the user doesn't have to keep track of the changing
setTimeout handles.
for (var sequence_code = sequence_base; typeof
sequenceTracker[sequence_code] != 'undefined'; ++sequence_code);
var sequence_target = "target_" + sequence_code;
// Start getting the URL
repeat = repeat*url_array.length;
sequenceURLLoad(url_array, freq, repeat, sequence_code,
sequence_target);
// Display the cancel code in the search field
if (sequence_code == sequence_base)
sequence_code = "";
else
sequence_code = " " + sequence_code;
document.deff.q.value = "To cancel: 'sequence cancel" +
sequence_code + "'";
setTimeout("document.deff.q.value='';",2000);
return true;
}
]]></script>
<copyright>
Copyright (c) 2002 David Bau
Distributed under the terms of the
GNU Public License, Version 2
(http://www.gnu.org/copyleft/gpl.txt)
</copyright>
</search>
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