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<?php // -*-php-*-
rcs_id('$Id: Transclude.php,v 1.9 2004/06/14 11:31:39 rurban Exp $');
/**
Copyright 1999, 2000, 2001, 2002 $ThePhpWikiProgrammingTeam
This file is part of PhpWiki.
PhpWiki is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
PhpWiki is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with PhpWiki; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/**
* Transclude: Include an external web page within the body of a wiki page.
*
* Usage:
* <?plugin Transclude
* src=http://www.internet-technology.de/fourwins_de.htm
* ?>
*
* @author Geoffrey T. Dairiki
*
* @see http://www.cs.tut.fi/~jkorpela/html/iframe.html
*
* KNOWN ISSUES
* Will only work if the browser supports <iframe>s (which is a recent,
* but standard tag)
*
* The auto-vertical resize javascript code only works if the transcluded
* page comes from the PhpWiki server. Otherwise (due to "tainting"
* security checks in JavaScript) I can't figure out how to deduce the
* height of the transcluded page via JavaScript... :-/
*
* Sometimes the auto-vertical resize code doesn't seem to make the iframe
* quite big enough --- the scroll bars remain. Not sure why.
*/
class WikiPlugin_Transclude
extends WikiPlugin
{
function getName() {
return _("Transclude");
}
function getDescription() {
return _("Include an external web page within the body of a wiki page.");
}
function getVersion() {
return preg_replace("/[Revision: $]/", '',
"\$Revision: 1.9 $");
}
function getDefaultArguments() {
return array( 'src' => false, // the src url to include
'height' => 450 // height of the iframe
);
}
function run($dbi, $argstr, &$request, $basepage) {
global $WikiTheme;
$args = ($this->getArgs($argstr, $request));
extract($args);
if (!$src) {
return $this->error(fmt("%s parameter missing", "'src'"));
}
// FIXME: Better recursion detection.
// FIXME: Currently this doesnt work at all.
if ($src == $request->getURLtoSelf() ) {
return $this->error(fmt("recursive inclusion of url %s", $src));
}
if (! IsSafeURL($src)) {
return $this->error(_("Bad url in src: remove all of <, >, \""));
}
$params = array('title' => _("Transcluded page"),
'src' => $src,
'width' => "100%",
'height' => $height,
'marginwidth' => 0,
'marginheight' => 0,
'class' => 'transclude',
"onload" => "adjust_iframe_height(this);");
$noframe_msg[] = fmt("See: %s", HTML::a(array('href' => $src), $src));
$noframe_msg = HTML::div(array('class' => 'transclusion'),
HTML::p(array(), $noframe_msg));
$iframe = HTML::div(HTML::iframe($params, $noframe_msg));
/* This doesn't work very well... maybe because CSS screws up NS4 anyway...
$iframe = new HtmlElement('ilayer', array('src' => $src), $iframe);
*/
return HTML(HTML::p(array('class' => 'transclusion-title'),
fmt("Transcluded from %s", LinkURL($src))),
$this->_js(), $iframe);
}
/**
* Produce our javascript.
*
* This is used to resize the iframe to fit the content.
* Currently it only works if the transcluded document comes
* from the same server as the wiki server.
*
* @access private
*/
function _js() {
static $seen = false;
if ($seen)
return '';
$seen = true;
return JavaScript('
function adjust_iframe_height(frame) {
var content = frame.contentDocument;
try {
frame.height = content.height + 2 * frame.marginHeight;
}
catch (e) {
// Can not get content.height unless transcluded doc
// is from the same server...
return;
}
}
window.addEventListener("resize", function() {
f = this.document.body.getElementsByTagName("iframe");
for (var i = 0; i < f.length; i++)
adjust_iframe_height(f[i]);
}, false);
');
}
};
// $Log: Transclude.php,v $
// Revision 1.9 2004/06/14 11:31:39 rurban
// renamed global $Theme to $WikiTheme (gforge nameclash)
// inherit PageList default options from PageList
// default sortby=pagename
// use options in PageList_Selectable (limit, sortby, ...)
// added action revert, with button at action=diff
// added option regex to WikiAdminSearchReplace
//
// Revision 1.8 2004/02/17 12:11:36 rurban
// added missing 4th basepage arg at plugin->run() to almost all plugins. This caused no harm so far, because it was silently dropped on normal usage. However on plugin internal ->run invocations it failed. (InterWikiSearch, IncludeSiteMap, ...)
//
// Revision 1.7 2003/02/27 22:47:27 dairiki
// New functions in HtmlElement:
//
// JavaScript($js)
// Helper for generating javascript.
//
// IfJavaScript($if_content, $else_content)
// Helper for generating
// <script>document.write('...')</script><noscript>...</noscript>
// constructs.
//
// Revision 1.6 2003/02/25 05:45:34 carstenklapp
// Added "See: " in front of url, so for browsers that do not support
// <iframe> at least there is an indication to the user that this
// plugin is actually doing something while at the same time without
// being (subjectively) too disruptive to page content.
//
// Revision 1.5 2003/02/24 14:34:44 carstenklapp
// Added iframe title (bobby.org accessibility guidelines).
// Simplified output for non-iframe and non-visual browsers (as suggested
// by http://www.uwosh.edu/programs/accessibility/tutorial.html).
//
// Revision 1.4 2003/01/18 22:08:01 carstenklapp
// Code cleanup:
// Reformatting & tabs to spaces;
// Added copyleft, getVersion, getDescription, rcs_id.
//
// (c-file-style: "gnu")
// Local Variables:
// mode: php
// tab-width: 8
// c-basic-offset: 4
// c-hanging-comment-ender-p: nil
// indent-tabs-mode: nil
// End:
?>
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