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/*
* $ lightbox_me
* By: Buck Wilson
* Version : 2.4
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
(function($) {
$.fn.lightbox_me = function(options) {
return this.each(function() {
var
opts = $.extend({}, $.fn.lightbox_me.defaults, options),
$overlay = $(),
$self = $(this),
$iframe = $('<iframe id="foo" style="z-index: ' + (opts.zIndex + 1) + ';border: none; margin: 0; padding: 0; position: absolute; width: 100%; height: 100%; top: 0; left: 0; filter: mask();"/>');
if (opts.showOverlay) {
//check if there's an existing overlay, if so, make subequent ones clear
var $currentOverlays = $(".js_lb_overlay:visible");
if ($currentOverlays.length > 0){
$overlay = $('<div class="lb_overlay_clear js_lb_overlay"/>');
} else {
$overlay = $('<div class="' + opts.classPrefix + '_overlay js_lb_overlay"/>');
}
}
/*----------------------------------------------------
DOM Building
---------------------------------------------------- */
$('body').append($self.hide()).append($overlay);
/*----------------------------------------------------
Overlay CSS stuffs
---------------------------------------------------- */
// set css of the overlay
if (opts.showOverlay) {
setOverlayHeight(); // pulled this into a function because it is called on window resize.
$overlay.css({ position: 'absolute', width: '100%', top: 0, left: 0, right: 0, bottom: 0, zIndex: (opts.zIndex + 2), display: 'none' });
if (!$overlay.hasClass('lb_overlay_clear')){
$overlay.css(opts.overlayCSS);
}
}
/*----------------------------------------------------
Animate it in.
---------------------------------------------------- */
//
if (opts.showOverlay) {
$overlay.fadeIn(opts.overlaySpeed, function() {
setSelfPosition();
$self[opts.appearEffect](opts.lightboxSpeed, function() { setOverlayHeight(); setSelfPosition(); opts.onLoad()});
});
} else {
setSelfPosition();
$self[opts.appearEffect](opts.lightboxSpeed, function() { opts.onLoad()});
}
/*----------------------------------------------------
Hide parent if parent specified (parentLightbox should be jquery reference to any parent lightbox)
---------------------------------------------------- */
if (opts.parentLightbox) {
opts.parentLightbox.fadeOut(200);
}
/*----------------------------------------------------
Bind Events
---------------------------------------------------- */
$(window).resize(setOverlayHeight)
.resize(setSelfPosition)
.scroll(setSelfPosition);
$(window).bind('keyup.lightbox_me', observeKeyPress);
if (opts.closeClick) {
$overlay.click(function(e) { closeLightbox(); e.preventDefault; });
}
$self.delegate(opts.closeSelector, "click", function(e) {
closeLightbox(); e.preventDefault();
});
$self.bind('close', closeLightbox);
$self.bind('reposition', setSelfPosition);
/*--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- */
/*----------------------------------------------------
Private Functions
---------------------------------------------------- */
/* Remove or hide all elements */
function closeLightbox() {
var s = $self[0].style;
if (opts.destroyOnClose) {
$self.add($overlay).remove();
} else {
$self.add($overlay).hide();
}
//show the hidden parent lightbox
if (opts.parentLightbox) {
opts.parentLightbox.fadeIn(200);
}
if (opts.preventScroll) {
$('body').css('overflow', '');
}
$iframe.remove();
// clean up events.
$self.undelegate(opts.closeSelector, "click");
$self.unbind('close', closeLightbox);
$self.unbind('repositon', setSelfPosition);
$(window).unbind('resize', setOverlayHeight);
$(window).unbind('resize', setSelfPosition);
$(window).unbind('scroll', setSelfPosition);
$(window).unbind('keyup.lightbox_me');
opts.onClose();
}
/* Function to bind to the window to observe the escape/enter key press */
function observeKeyPress(e) {
if((e.keyCode == 27 || (e.DOM_VK_ESCAPE == 27 && e.which==0)) && opts.closeEsc) closeLightbox();
}
/* Set the height of the overlay
: if the document height is taller than the window, then set the overlay height to the document height.
: otherwise, just set overlay height: 100%
*/
function setOverlayHeight() {
if ($(window).height() < $(document).height()) {
$overlay.css({height: $(document).height() + 'px'});
$iframe.css({height: $(document).height() + 'px'});
} else {
$overlay.css({height: '100%'});
}
}
/* Set the position of the modal'd window ($self)
: if $self is taller than the window, then make it absolutely positioned
: otherwise fixed
*/
function setSelfPosition() {
var s = $self[0].style;
// reset CSS so width is re-calculated for margin-left CSS
$self.css({left: '50%', marginLeft: ($self.outerWidth() / 2) * -1, zIndex: (opts.zIndex + 3) });
/* we have to get a little fancy when dealing with height, because lightbox_me
is just so fancy.
*/
// if the height of $self is bigger than the window and self isn't already position absolute
if (($self.height() + 80 >= $(window).height()) && ($self.css('position') != 'absolute')) {
// we are going to make it positioned where the user can see it, but they can still scroll
// so the top offset is based on the user's scroll position.
var topOffset = $(document).scrollTop() + 40;
$self.css({position: 'absolute', top: topOffset + 'px', marginTop: 0})
} else if ($self.height()+ 80 < $(window).height()) {
//if the height is less than the window height, then we're gonna make this thing position: fixed.
if (opts.centered) {
$self.css({ position: 'fixed', top: '50%', marginTop: ($self.outerHeight() / 2) * -1})
} else {
$self.css({ position: 'fixed'}).css(opts.modalCSS);
}
if (opts.preventScroll) {
$('body').css('overflow', 'hidden');
}
}
}
});
};
$.fn.lightbox_me.defaults = {
// animation
appearEffect: "fadeIn",
appearEase: "",
overlaySpeed: 250,
lightboxSpeed: 300,
// close
closeSelector: ".close",
closeClick: true,
closeEsc: true,
// behavior
destroyOnClose: false,
showOverlay: true,
parentLightbox: false,
preventScroll: false,
// callbacks
onLoad: function() {},
onClose: function() {},
// style
classPrefix: 'lb',
zIndex: 999,
centered: false,
modalCSS: {top: '40px'},
overlayCSS: {background: 'black', opacity: .3}
}
})(jQuery);
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