Merge pull request #132 from ArthurHoaro/picwall

Lazy load images with the light lib bLazy.js instead of jQuery
This commit is contained in:
nodiscc 2015-03-04 23:27:28 +01:00
commit 0e5400e617
9 changed files with 250 additions and 278 deletions

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@ -50,9 +50,9 @@ Files: Files: inc/jquery*.js, inc/jquery-ui*.js
License: MIT License (http://opensource.org/licenses/MIT) License: MIT License (http://opensource.org/licenses/MIT)
Copyright: (C) jQuery Foundation and other contributors,https://jquery.com/download/ Copyright: (C) jQuery Foundation and other contributors,https://jquery.com/download/
Files: inc/jquery-lazyload*.js Files: inc/blazy*.js
License: MIT License (http://opensource.org/licenses/MIT) License: MIT License (http://opensource.org/licenses/MIT)
Copyright: (C) Mika Tuupola, https://github.com/tuupola Copyright: (C) Bjoern Klinggaard - @bklinggaard - http://dinbror.dk/blazy
Files: inc/qr.js Files: inc/qr.js
License: GPLv3 License (http://opensource.org/licenses/gpl-3.0) License: GPLv3 License (http://opensource.org/licenses/gpl-3.0)

232
inc/blazy-1.3.1.js Normal file
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@ -0,0 +1,232 @@
/*!
hey, [be]Lazy.js - v1.3.1 - 2015.02.01
A lazy loading and multi-serving image script
(c) Bjoern Klinggaard - @bklinggaard - http://dinbror.dk/blazy
*/
;(function(root, blazy) {
if (typeof define === 'function' && define.amd) {
// AMD. Register bLazy as an anonymous module
define(blazy);
} else if (typeof exports === 'object') {
// Node. Does not work with strict CommonJS, but
// only CommonJS-like environments that support module.exports,
// like Node.
module.exports = blazy();
} else {
// Browser globals. Register bLazy on window
root.Blazy = blazy();
}
})(this, function () {
'use strict';
//vars
var source, options, viewport, images, count, isRetina, destroyed;
//throttle vars
var validateT, saveViewportOffsetT;
// constructor
function Blazy(settings) {
//IE7- fallback for missing querySelectorAll support
if (!document.querySelectorAll) {
var s=document.createStyleSheet();
document.querySelectorAll = function(r, c, i, j, a) {
a=document.all, c=[], r = r.replace(/\[for\b/gi, '[htmlFor').split(',');
for (i=r.length; i--;) {
s.addRule(r[i], 'k:v');
for (j=a.length; j--;) a[j].currentStyle.k && c.push(a[j]);
s.removeRule(0);
}
return c;
};
}
//init vars
destroyed = true;
images = [];
viewport = {};
//options
options = settings || {};
options.error = options.error || false;
options.offset = options.offset || 100;
options.success = options.success || false;
options.selector = options.selector || '.b-lazy';
options.separator = options.separator || '|';
options.container = options.container ? document.querySelectorAll(options.container) : false;
options.errorClass = options.errorClass || 'b-error';
options.breakpoints = options.breakpoints || false;
options.successClass = options.successClass || 'b-loaded';
options.src = source = options.src || 'data-src';
isRetina = window.devicePixelRatio > 1;
viewport.top = 0 - options.offset;
viewport.left = 0 - options.offset;
//throttle, ensures that we don't call the functions too often
validateT = throttle(validate, 25);
saveViewportOffsetT = throttle(saveViewportOffset, 50);
saveViewportOffset();
//handle multi-served image src
each(options.breakpoints, function(object){
if(object.width >= window.screen.width) {
source = object.src;
return false;
}
});
// start lazy load
initialize();
}
/* public functions
************************************/
Blazy.prototype.revalidate = function() {
initialize();
};
Blazy.prototype.load = function(element, force){
if(!isElementLoaded(element)) loadImage(element, force);
};
Blazy.prototype.destroy = function(){
if(options.container){
each(options.container, function(object){
unbindEvent(object, 'scroll', validateT);
});
}
unbindEvent(window, 'scroll', validateT);
unbindEvent(window, 'resize', validateT);
unbindEvent(window, 'resize', saveViewportOffsetT);
count = 0;
images.length = 0;
destroyed = true;
};
/* private helper functions
************************************/
function initialize(){
// First we create an array of images to lazy load
createImageArray(options.selector);
// Then we bind resize and scroll events if not already binded
if(destroyed) {
destroyed = false;
if(options.container) {
each(options.container, function(object){
bindEvent(object, 'scroll', validateT);
});
}
bindEvent(window, 'resize', saveViewportOffsetT);
bindEvent(window, 'resize', validateT);
bindEvent(window, 'scroll', validateT);
}
// And finally, we start to lazy load. Should bLazy ensure domready?
validate();
}
function validate() {
for(var i = 0; i<count; i++){
var image = images[i];
if(elementInView(image) || isElementLoaded(image)) {
Blazy.prototype.load(image);
images.splice(i, 1);
count--;
i--;
}
}
if(count === 0) {
Blazy.prototype.destroy();
}
}
function loadImage(ele, force){
// if element is visible
if(force || (ele.offsetWidth > 0 && ele.offsetHeight > 0)) {
var dataSrc = ele.getAttribute(source) || ele.getAttribute(options.src); // fallback to default data-src
if(dataSrc) {
var dataSrcSplitted = dataSrc.split(options.separator);
var src = dataSrcSplitted[isRetina && dataSrcSplitted.length > 1 ? 1 : 0];
var img = new Image();
// cleanup markup, remove data source attributes
each(options.breakpoints, function(object){
ele.removeAttribute(object.src);
});
ele.removeAttribute(options.src);
img.onerror = function() {
if(options.error) options.error(ele, "invalid");
ele.className = ele.className + ' ' + options.errorClass;
};
img.onload = function() {
// Is element an image or should we add the src as a background image?
ele.nodeName.toLowerCase() === 'img' ? ele.src = src : ele.style.backgroundImage = 'url("' + src + '")';
ele.className = ele.className + ' ' + options.successClass;
if(options.success) options.success(ele);
};
img.src = src; //preload image
} else {
if(options.error) options.error(ele, "missing");
ele.className = ele.className + ' ' + options.errorClass;
}
}
}
function elementInView(ele) {
var rect = ele.getBoundingClientRect();
return (
// Intersection
rect.right >= viewport.left
&& rect.bottom >= viewport.top
&& rect.left <= viewport.right
&& rect.top <= viewport.bottom
);
}
function isElementLoaded(ele) {
return (' ' + ele.className + ' ').indexOf(' ' + options.successClass + ' ') !== -1;
}
function createImageArray(selector) {
var nodelist = document.querySelectorAll(selector);
count = nodelist.length;
//converting nodelist to array
for(var i = count; i--; images.unshift(nodelist[i])){}
}
function saveViewportOffset(){
viewport.bottom = (window.innerHeight || document.documentElement.clientHeight) + options.offset;
viewport.right = (window.innerWidth || document.documentElement.clientWidth) + options.offset;
}
function bindEvent(ele, type, fn) {
if (ele.attachEvent) {
ele.attachEvent && ele.attachEvent('on' + type, fn);
} else {
ele.addEventListener(type, fn, false);
}
}
function unbindEvent(ele, type, fn) {
if (ele.detachEvent) {
ele.detachEvent && ele.detachEvent('on' + type, fn);
} else {
ele.removeEventListener(type, fn, false);
}
}
function each(object, fn){
if(object && fn) {
var l = object.length;
for(var i = 0; i<l && fn(object[i], i) !== false; i++){}
}
}
function throttle(fn, minDelay) {
var lastCall = 0;
return function() {
var now = +new Date();
if (now - lastCall < minDelay) {
return;
}
lastCall = now;
fn.apply(images, arguments);
};
}
return Blazy;
});

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inc/blazy-1.3.1.min.js vendored Normal file

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@ -1,242 +0,0 @@
/*
* Lazy Load - jQuery plugin for lazy loading images
*
* Copyright (c) 2007-2013 Mika Tuupola
*
* Licensed under the MIT license:
* http://www.opensource.org/licenses/mit-license.php
*
* Project home:
* http://www.appelsiini.net/projects/lazyload
*
* Version: 1.9.3
*
*/
(function($, window, document, undefined) {
var $window = $(window);
$.fn.lazyload = function(options) {
var elements = this;
var $container;
var settings = {
threshold : 0,
failure_limit : 0,
event : "scroll",
effect : "show",
container : window,
data_attribute : "original",
skip_invisible : true,
appear : null,
load : null,
placeholder : "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB/AAffA0nNPuCLAAAAAElFTkSuQmCC"
};
function update() {
var counter = 0;
elements.each(function() {
var $this = $(this);
if (settings.skip_invisible && !$this.is(":visible")) {
return;
}
if ($.abovethetop(this, settings) ||
$.leftofbegin(this, settings)) {
/* Nothing. */
} else if (!$.belowthefold(this, settings) &&
!$.rightoffold(this, settings)) {
$this.trigger("appear");
/* if we found an image we'll load, reset the counter */
counter = 0;
} else {
if (++counter > settings.failure_limit) {
return false;
}
}
});
}
if(options) {
/* Maintain BC for a couple of versions. */
if (undefined !== options.failurelimit) {
options.failure_limit = options.failurelimit;
delete options.failurelimit;
}
if (undefined !== options.effectspeed) {
options.effect_speed = options.effectspeed;
delete options.effectspeed;
}
$.extend(settings, options);
}
/* Cache container as jQuery as object. */
$container = (settings.container === undefined ||
settings.container === window) ? $window : $(settings.container);
/* Fire one scroll event per scroll. Not one scroll event per image. */
if (0 === settings.event.indexOf("scroll")) {
$container.bind(settings.event, function() {
return update();
});
}
this.each(function() {
var self = this;
var $self = $(self);
self.loaded = false;
/* If no src attribute given use data:uri. */
if ($self.attr("src") === undefined || $self.attr("src") === false) {
if ($self.is("img")) {
$self.attr("src", settings.placeholder);
}
}
/* When appear is triggered load original image. */
$self.one("appear", function() {
if (!this.loaded) {
if (settings.appear) {
var elements_left = elements.length;
settings.appear.call(self, elements_left, settings);
}
$("<img />")
.bind("load", function() {
var original = $self.attr("data-" + settings.data_attribute);
$self.hide();
if ($self.is("img")) {
$self.attr("src", original);
} else {
$self.css("background-image", "url('" + original + "')");
}
$self[settings.effect](settings.effect_speed);
self.loaded = true;
/* Remove image from array so it is not looped next time. */
var temp = $.grep(elements, function(element) {
return !element.loaded;
});
elements = $(temp);
if (settings.load) {
var elements_left = elements.length;
settings.load.call(self, elements_left, settings);
}
})
.attr("src", $self.attr("data-" + settings.data_attribute));
}
});
/* When wanted event is triggered load original image */
/* by triggering appear. */
if (0 !== settings.event.indexOf("scroll")) {
$self.bind(settings.event, function() {
if (!self.loaded) {
$self.trigger("appear");
}
});
}
});
/* Check if something appears when window is resized. */
$window.bind("resize", function() {
update();
});
/* With IOS5 force loading images when navigating with back button. */
/* Non optimal workaround. */
if ((/(?:iphone|ipod|ipad).*os 5/gi).test(navigator.appVersion)) {
$window.bind("pageshow", function(event) {
if (event.originalEvent && event.originalEvent.persisted) {
elements.each(function() {
$(this).trigger("appear");
});
}
});
}
/* Force initial check if images should appear. */
$(document).ready(function() {
update();
});
return this;
};
/* Convenience methods in jQuery namespace. */
/* Use as $.belowthefold(element, {threshold : 100, container : window}) */
$.belowthefold = function(element, settings) {
var fold;
if (settings.container === undefined || settings.container === window) {
fold = (window.innerHeight ? window.innerHeight : $window.height()) + $window.scrollTop();
} else {
fold = $(settings.container).offset().top + $(settings.container).height();
}
return fold <= $(element).offset().top - settings.threshold;
};
$.rightoffold = function(element, settings) {
var fold;
if (settings.container === undefined || settings.container === window) {
fold = $window.width() + $window.scrollLeft();
} else {
fold = $(settings.container).offset().left + $(settings.container).width();
}
return fold <= $(element).offset().left - settings.threshold;
};
$.abovethetop = function(element, settings) {
var fold;
if (settings.container === undefined || settings.container === window) {
fold = $window.scrollTop();
} else {
fold = $(settings.container).offset().top;
}
return fold >= $(element).offset().top + settings.threshold + $(element).height();
};
$.leftofbegin = function(element, settings) {
var fold;
if (settings.container === undefined || settings.container === window) {
fold = $window.scrollLeft();
} else {
fold = $(settings.container).offset().left;
}
return fold >= $(element).offset().left + settings.threshold + $(element).width();
};
$.inviewport = function(element, settings) {
return !$.rightoffold(element, settings) && !$.leftofbegin(element, settings) &&
!$.belowthefold(element, settings) && !$.abovethetop(element, settings);
};
/* Custom selectors for your convenience. */
/* Use as $("img:below-the-fold").something() or */
/* $("img").filter(":below-the-fold").something() which is faster */
$.extend($.expr[":"], {
"below-the-fold" : function(a) { return $.belowthefold(a, {threshold : 0}); },
"above-the-top" : function(a) { return !$.belowthefold(a, {threshold : 0}); },
"right-of-screen": function(a) { return $.rightoffold(a, {threshold : 0}); },
"left-of-screen" : function(a) { return !$.rightoffold(a, {threshold : 0}); },
"in-viewport" : function(a) { return $.inviewport(a, {threshold : 0}); },
/* Maintain BC for couple of versions. */
"above-the-fold" : function(a) { return !$.belowthefold(a, {threshold : 0}); },
"right-of-fold" : function(a) { return $.rightoffold(a, {threshold : 0}); },
"left-of-fold" : function(a) { return !$.rightoffold(a, {threshold : 0}); }
});
})(jQuery, window, document);

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@ -647,9 +647,21 @@ a.qrcode img {
float: left; float: left;
} }
.b-lazy {
-webkit-transition: opacity 500ms ease-in-out;
-moz-transition: opacity 500ms ease-in-out;
-o-transition: opacity 500ms ease-in-out;
transition: opacity 500ms ease-in-out;
opacity: 0;
}
.b-lazy.b-loaded {
opacity: 1;
}
.picwall_pictureframe img { .picwall_pictureframe img {
max-width: 100%; max-width: 100%;
height: auto; height: auto;
color: transparent;
} /* Adapt the width of the image */ } /* Adapt the width of the image */
.picwall_pictureframe a { .picwall_pictureframe a {

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@ -2125,11 +2125,8 @@ function lazyThumbnail($url,$href=false)
$html='<a href="'.htmlspecialchars($t['href']).'">'; $html='<a href="'.htmlspecialchars($t['href']).'">';
// Lazy image (only loaded by JavaScript when in the viewport). // Lazy image
if (!empty($GLOBALS['disablejquery'])) // (except if jQuery is disabled) $html.='<img class="b-lazy" src="#" data-src="'.htmlspecialchars($t['src']).'"';
$html.='<img class="lazyimage" src="'.htmlspecialchars($t['src']).'"';
else
$html.='<img class="lazyimage" src="#" data-original="'.htmlspecialchars($t['src']).'"';
if (!empty($t['width'])) $html.=' width="'.htmlspecialchars($t['width']).'"'; if (!empty($t['width'])) $html.=' width="'.htmlspecialchars($t['width']).'"';
if (!empty($t['height'])) $html.=' height="'.htmlspecialchars($t['height']).'"'; if (!empty($t['height'])) $html.=' height="'.htmlspecialchars($t['height']).'"';

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@ -1,11 +1,7 @@
<!DOCTYPE html> <!DOCTYPE html>
<html> <html>
<head>{include="includes"} <head>{include="includes"}
{if="empty($GLOBALS['disablejquery'])"} <script src="inc/blazy-1.3.1.min.js#"></script>
<script src="inc/jquery-1.11.2.min.js#"></script>
<script src="inc/jquery-ui-1.11.2.min.js#"></script>
<script src="inc/jquery.lazyload-1.9.3.min.js#"></script>
{/if}
</head> </head>
<body> <body>
<div id="pageheader">{include="page.header"}</div> <div id="pageheader">{include="page.header"}</div>
@ -20,12 +16,8 @@
</div> </div>
{include="page.footer"} {include="page.footer"}
{if="empty($GLOBALS['disablejquery'])"}
<script> <script>
$(document).ready(function() { var bLazy = new Blazy();
$("img.lazyimage").show().lazyload();
});
</script> </script>
{/if}
</body> </body>
</html> </html>

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@ -1,19 +0,0 @@
<!DOCTYPE html>
<html>
<head>{include="includes"}</head>
<body>
<div id="pageheader">{include="page.header"}</div>
<div style="background-color:#003;">
{loop="linksToDisplay"}
<div style="float:left;width:48%;border-right:2px solid white;height:120px;overflow:hide;">
<div style="float:left;width:120px;text-align:center">{$value.thumbnail}</div>
<a href="{$value.permalink}" style="color:yellow;font-weight:bold;text-decoration:none;">{$value.title|htmlspecialchars}</a><br>
<span style="font-size:8pt;color:#eee;">{$value.description|htmlspecialchars}</span>
<div style="clear:both;"></div>
</div><br>
{/loop}
</div>
{include="page.footer"}
</body>
</html>