diff options
Diffstat (limited to 'js')
| -rw-r--r-- | js/empty.jpg | bin | 0 -> 29079 bytes | |||
| -rw-r--r-- | js/jquery-1.6.min.js | 16 | ||||
| -rw-r--r-- | js/jquery.lazyload.js | 164 |
3 files changed, 180 insertions, 0 deletions
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\ No newline at end of file diff --git a/js/jquery.lazyload.js b/js/jquery.lazyload.js new file mode 100644 index 0000000..276e988 --- /dev/null +++ b/js/jquery.lazyload.js @@ -0,0 +1,164 @@ +/* + * Lazy Load - jQuery plugin for lazy loading images + * + * Copyright (c) 2007-2009 Mika Tuupola + * + * Licensed under the MIT license: + * http://www.opensource.org/licenses/mit-license.php + * + * Project home: + * http://www.appelsiini.net/projects/lazyload + * + * Version: 1.5.0 + * + */ +(function($) { + + $.fn.lazyload = function(options) { + var settings = { + threshold : 0, + failurelimit : 0, + event : "scroll", + effect : "show", + container : window + }; + + if(options) { + $.extend(settings, options); + } + + /* Fire one scroll event per scroll. Not one scroll event per image. */ + var elements = this; + if ("scroll" == settings.event) { + $(settings.container).bind("scroll", function(event) { + + var counter = 0; + elements.each(function() { + if ($.abovethetop(this, settings) || + $.leftofbegin(this, settings)) { + /* Nothing. */ + } else if (!$.belowthefold(this, settings) && + !$.rightoffold(this, settings)) { + $(this).trigger("appear"); + } else { + if (counter++ > settings.failurelimit) { + return false; + } + } + }); + /* Remove image from array so it is not looped next time. */ + var temp = $.grep(elements, function(element) { + return !element.loaded; + }); + elements = $(temp); + }); + } + + this.each(function() { + var self = this; + + /* Save original only if it is not defined in HTML. */ + if (undefined == $(self).attr("original")) { + $(self).attr("original", $(self).attr("src")); + } + + if ("scroll" != settings.event || + undefined == $(self).attr("src") || + settings.placeholder == $(self).attr("src") || + ($.abovethetop(self, settings) || + $.leftofbegin(self, settings) || + $.belowthefold(self, settings) || + $.rightoffold(self, settings) )) { + + if (settings.placeholder) { + $(self).attr("src", settings.placeholder); + } else { + $(self).removeAttr("src"); + } + self.loaded = false; + } else { + self.loaded = true; + } + + /* When appear is triggered load original image. */ + $(self).one("appear", function() { + if (!this.loaded) { + $("<img />") + .bind("load", function() { + $(self) + .hide() + .attr("src", $(self).attr("original")) + [settings.effect](settings.effectspeed); + self.loaded = true; + }) + .attr("src", $(self).attr("original")); + }; + }); + + /* When wanted event is triggered load original image */ + /* by triggering appear. */ + if ("scroll" != settings.event) { + $(self).bind(settings.event, function(event) { + if (!self.loaded) { + $(self).trigger("appear"); + } + }); + } + }); + + /* Force initial check if images should appear. */ + $(settings.container).trigger(settings.event); + + return this; + + }; + + /* Convenience methods in jQuery namespace. */ + /* Use as $.belowthefold(element, {threshold : 100, container : window}) */ + + $.belowthefold = function(element, settings) { + if (settings.container === undefined || settings.container === window) { + var fold = $(window).height() + $(window).scrollTop(); + } else { + var fold = $(settings.container).offset().top + $(settings.container).height(); + } + return fold <= $(element).offset().top - settings.threshold; + }; + + $.rightoffold = function(element, settings) { + if (settings.container === undefined || settings.container === window) { + var fold = $(window).width() + $(window).scrollLeft(); + } else { + var fold = $(settings.container).offset().left + $(settings.container).width(); + } + return fold <= $(element).offset().left - settings.threshold; + }; + + $.abovethetop = function(element, settings) { + if (settings.container === undefined || settings.container === window) { + var fold = $(window).scrollTop(); + } else { + var fold = $(settings.container).offset().top; + } + return fold >= $(element).offset().top + settings.threshold + $(element).height(); + }; + + $.leftofbegin = function(element, settings) { + if (settings.container === undefined || settings.container === window) { + var fold = $(window).scrollLeft(); + } else { + var fold = $(settings.container).offset().left; + } + return fold >= $(element).offset().left + settings.threshold + $(element).width(); + }; + /* Custom selectors for your convenience. */ + /* Use as $("img:below-the-fold").something() */ + + $.extend($.expr[':'], { + "below-the-fold" : "$.belowthefold(a, {threshold : 0, container: window})", + "above-the-fold" : "!$.belowthefold(a, {threshold : 0, container: window})", + "right-of-fold" : "$.rightoffold(a, {threshold : 0, container: window})", + "left-of-fold" : "!$.rightoffold(a, {threshold : 0, container: window})" + }); + +})(jQuery); |
