Annotation of doc/techtips/worktime-2.html, revision 1.1
1.1 ! albertel 1: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
! 2: <html>
! 3: <head>
! 4: <title>Worktime, New Tag</title>
! 5: </head>
! 6:
! 7: <body>
! 8: <h1>Worktime, New Tag</h1>
! 9:
! 10: <h2>Adding a New Tag</h2>
! 11: <p>
! 12: We will add the tag <blue> to the XML handler. It will
! 13: change all text inside of it to be blue when viewing a webpage.
! 14: </p>
! 15:
! 16: <ol>
! 17: <li>
! 18: First you will need to add the author role to domcc<br />
! 19: Use the
! 20: CUSR button on the remote, type in the username 'domcc' and then
! 21: add the author role. Logout, and log back in. (You will also need
! 22: to let the webserver have permission to enter domcc's home
! 23: directory, do this by having domcc do <tt>chmod a+x /home/domcc
! 24: </tt>
! 25: </li>
! 26: <li>
! 27: Next create a homework problem. Something simple. In the text
! 28: section of the homework problem. Surround the text of the
! 29: problem with the tag pair <blue> and </blue>
! 30: </li>
! 31: <li>
! 32: When you view the problem you should see no change. (This is
! 33: because by default browsers ignore tags they are unfamiliar
! 34: with.)
! 35: </li>
! 36: <li>
! 37: Next you will need to edit the londefdef.pm file in the xml
! 38: subdriectory, and we will do the required actions to make a
! 39: new tag handler.
! 40: </li>
! 41: <li>
! 42: First we need to register the tag with the xml parser. Notice
! 43: that at the top of the londefdef.pm file there is a call to
! 44: register, right in front of the <tt>'m'</tt> put <tt>'blue',</tt>.
! 45: Don't forget the comma.
! 46: </li>
! 47: <li>
! 48: Next we need to create 2 functions. &start_blue() and
! 49: &end_blue(). They will be called when the parser sees the
! 50: start and end blue tags.
! 51: </li>
! 52: <li>
! 53: Add 'Code Fragment 1' to the londefdef.pm file. Copy
! 54: londefdef.pm to <tt>/home/httpd/lib/perl/Apache</tt> and
! 55: restart the webserver. This is the last time I will tell you
! 56: this.
! 57: </li>
! 58: <li>
! 59: Go back and view your homework problem. You should see the two
! 60: messages 'Starting the blue tag now!!!' and 'Ending the blue
! 61: tag now!!!', notice that it appears a second time in the
! 62: bottom section, that is because that is a parse of the answer
! 63: target. We need to stop produicng oputput for any target other
! 64: than web.
! 65: </li>
! 66: <li>
! 67: Now change the code to be as in Code Fragment 2.
! 68: </li>
! 69: <li>
! 70: Now it should only appear in the middle of the problem. Now
! 71: lets make it turn the text blue.
! 72: <li>
! 73: Change you code to look like Code Fragment 3
! 74: </li>
! 75: <li>
! 76: Now when you view the problem the text should appear in blue.
! 77: </li>
! 78: </ol>
! 79:
! 80: <h3>Code fragment 1</h3>
! 81: <pre>
! 82: sub start_blue {
! 83: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
! 84: my $result='';
! 85: $result='<br />Starting the blue tag now!!!<br />';
! 86: return $result;
! 87: }
! 88:
! 89: sub end_blue {
! 90: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
! 91: my $result='';
! 92: $result='<br />Ending the blue tag now!!!<br />';
! 93: return $result;
! 94: }
! 95: </pre>
! 96:
! 97: <h3>Code fragment 2</h3>
! 98: <pre>
! 99: sub start_blue {
! 100: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
! 101: my $result='';
! 102: <b> if ($target eq 'web') {</b>
! 103: <i>$result='<br />Starting the blue tag now!!!<br />';</i>
! 104: <b> }</b>
! 105: return $result;
! 106: }
! 107:
! 108: sub end_blue {
! 109: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
! 110: my $result='';
! 111: <b> if ($target eq 'web') {</b>
! 112: <i>$result='<br />Ending the blue tag now!!!<br />';</i>
! 113: <b> }</b>
! 114: return $result;
! 115: }
! 116: </pre>
! 117: <h3>Code fragment 2</h3>
! 118: <pre>
! 119: sub start_blue {
! 120: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
! 121: my $result='';
! 122: if ($target eq 'web') {
! 123: <i>$result='<font color="blue">';</i>
! 124: }
! 125: return $result;
! 126: }
! 127:
! 128: sub end_blue {
! 129: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
! 130: my $result='';
! 131: if ($target eq 'web') {
! 132: <i>$result='</font>';</i>
! 133: }
! 134: return $result;
! 135: }
! 136: </pre>
! 137: <hr>
! 138: <address><a href="mailto:albertel@mileva.lite.msu.edu">Guy Albertelli</a></address>
! 139: <!-- Created: Tue Jun 11 10:09:35 EDT 2002 -->
! 140: <!-- hhmts start -->
! 141: Last modified: Tue Jun 11 11:01:29 EDT 2002
! 142: <!-- hhmts end -->
! 143: </body>
! 144: </html>
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