/*
* jQuery Expander plugin
* Version 0.4 (12/09/2008)
* @requires jQuery v1.1.1+
*
* Dual licensed under the MIT and GPL licenses:
* http://www.opensource.org/licenses/mit-license.php
* http://www.gnu.org/licenses/gpl.html
*
*/
(function($) {
$.fn.expander = function(options) {
var opts = $.extend({}, $.fn.expander.defaults, options);
var delayedCollapse;
return this.each(function() {
var $this = $(this);
var o = $.meta ? $.extend({}, opts, $this.data()) : opts;
var cleanedTag, startTags, endTags;
var allText = $this.html();
var startText = allText.slice(0, o.slicePoint).replace(/\w+$/,'');
startTags = startText.match(/<\w[^>]*>/g);
if (startTags) {startText = allText.slice(0,o.slicePoint + startTags.join('').length).replace(/\w+$/,'');}
if (startText.lastIndexOf('<') > startText.lastIndexOf('>') ) {
startText = startText.slice(0,startText.lastIndexOf('<'));
}
var endText = allText.slice(startText.length);
// create necessary expand/collapse elements if they don't already exist
if (!$('span.details', this).length) {
// end script if text length isn't long enough.
if ( endText.replace(/\s+$/,'').split(' ').length < o.widow ) { return; }
// otherwise, continue...
if (endText.indexOf(' -1) {
endTags = endText.match(/<(\/)?[^>]*>/g);
for (var i=0; i < endTags.length; i++) {
if (endTags[i].indexOf(' -1) {
var startTag, startTagExists = false;
for (var j=0; j < i; j++) {
startTag = endTags[j].slice(0, endTags[j].indexOf(' ')).replace(/(\w)$/,'$1>');
if (startTag == rSlash(endTags[i])) {
startTagExists = true;
}
}
if (!startTagExists) {
startText = startText + endTags[i];
var matched = false;
for (var s=startTags.length - 1; s >= 0; s--) {
if (startTags[s].slice(0, startTags[s].indexOf(' ')).replace(/(\w)$/,'$1>') == rSlash(endTags[i])
&& matched == false) {
cleanedTag = cleanedTag ? startTags[s] + cleanedTag : startTags[s];
matched = true;
}
};
}
}
}
endText = cleanedTag && cleanedTag + endText || endText;
}
$this.html([
startText,
'',
o.expandPrefix,
'',
o.expandText,
'',
'',
'',
endText,
''
].join('')
);
}
var $thisDetails = $('span.details', this),
$readMore = $('span.read-more', this);
$thisDetails.hide();
$readMore.find('a').click(function() {
$readMore.hide();
if (o.expandEffect === 'show' && !o.expandSpeed) {
o.beforeExpand($this);
$thisDetails.show();
o.afterExpand($this);
delayCollapse(o, $thisDetails);
} else {
o.beforeExpand($this);
$thisDetails[o.expandEffect](o.expandSpeed, function() {
$thisDetails.css({zoom: ''});
o.afterExpand($this);
delayCollapse(o, $thisDetails);
});
}
return false;
});
if (o.userCollapse) {
$this
.find('span.details').append('' + o.userCollapsePrefix + '' + o.userCollapseText + '');
$this.find('span.re-collapse a').click(function() {
clearTimeout(delayedCollapse);
var $detailsCollapsed = $(this).parents('span.details');
reCollapse($detailsCollapsed);
o.onCollapse($this, true);
return false;
});
}
});
function reCollapse(el) {
el.hide()
.prev('span.read-more').show();
}
function delayCollapse(option, $collapseEl) {
if (option.collapseTimer) {
delayedCollapse = setTimeout(function() {
reCollapse($collapseEl);
option.onCollapse($collapseEl.parent(), false);
},
option.collapseTimer
);
}
}
function rSlash(rString) {
return rString.replace(/\//,'');
}
};
// plugin defaults
$.fn.expander.defaults = {
slicePoint: 100, // the number of characters at which the contents will be sliced into two parts.
// Note: any tag names in the HTML that appear inside the sliced element before
// the slicePoint will be counted along with the text characters.
widow: 4, // a threshold of sorts for whether to initially hide/collapse part of the element's contents.
// If after slicing the contents in two there are fewer words in the second part than
// the value set by widow, we won't bother hiding/collapsing anything.
expandText: 'read more', // text displayed in a link instead of the hidden part of the element.
// clicking this will expand/show the hidden/collapsed text
expandPrefix: '… ',
collapseTimer: 0, // number of milliseconds after text has been expanded at which to collapse the text again
expandEffect: 'fadeIn',
expandSpeed: '', // speed in milliseconds of the animation effect for expanding the text
userCollapse: true, // allow the user to re-collapse the expanded text.
userCollapseText: '[close]', // text to use for the link to re-collapse the text
userCollapsePrefix: ' ',
beforeExpand: function($thisEl) {},
afterExpand: function($thisEl) {},
onCollapse: function($thisEl, byUser) {}
};
})(jQuery);
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