/*
* Justified Gallery - v3.4.0
* http://miromannino.com/projects/justified-gallery/
* Copyright (c) 2014 Miro Mannino
* Licensed under the MIT license.
*/
(function($) {
/* Events
jg.complete : called when all the gallery has been created
jg.resize : called when the gallery has been resized
*/
$.fn.justifiedGallery = function (arg) {
// Default options
var defaults = {
sizeRangeSuffixes : {
'lt100': '_t',
'lt240': '_m',
'lt320': '_n',
'lt500': '',
'lt640': '_z',
'lt1024': '_b'
},
rowHeight : 120,
maxRowHeight : 0, //negative value = no limits, 0 = 1.5 * rowHeight
margins : 1,
lastRow : 'nojustify', // or can be 'justify' or 'hide'
justifyThreshold: 0.75, /* if row width / available space > 0.75 it will be always justified
(i.e. lastRow setting is not considered) */
fixedHeight : false,
waitThumbnailsLoad : true,
captions : true,
cssAnimation: false,
imagesAnimationDuration : 500, //ignored with css animations
captionSettings : { //ignored with css animations
animationDuration : 500,
visibleOpacity : 0.7,
nonVisibleOpacity : 0.0
},
rel : null, //rewrite the rel of each analyzed links
target : null, //rewrite the target of all links
extension : /\.[^.\\/]+$/,
refreshTime : 100,
randomize : false
};
function getSuffix(width, height, context) {
var longestSide;
longestSide = (width > height) ? width : height;
if (longestSide <= 100) {
return context.settings.sizeRangeSuffixes.lt100;
} else if (longestSide <= 240) {
return context.settings.sizeRangeSuffixes.lt240;
} else if (longestSide <= 320) {
return context.settings.sizeRangeSuffixes.lt320;
} else if (longestSide <= 500) {
return context.settings.sizeRangeSuffixes.lt500;
} else if (longestSide <= 640) {
return context.settings.sizeRangeSuffixes.lt640;
} else {
return context.settings.sizeRangeSuffixes.lt1024;
}
}
function endsWith(str, suffix) {
return str.indexOf(suffix, str.length - suffix.length) !== -1;
}
function removeSuffix(str, suffix) {
return str.substring(0, str.length - suffix.length);
}
function getUsedSuffix(str, context) {
var voidSuffix = false;
for (var si in context.settings.sizeRangeSuffixes) {
if (context.settings.sizeRangeSuffixes[si].length === 0) {
voidSuffix = true;
continue;
}
if (endsWith(str, context.settings.sizeRangeSuffixes[si])) {
return context.settings.sizeRangeSuffixes[si];
}
}
if (voidSuffix) return "";
else throw 'unknown suffix for ' + str;
}
/* Given an image src, with the width and the height, returns the new image src with the
best suffix to show the best quality thumbnail. */
function newSrc(imageSrc, imgWidth, imgHeight, context) {
var matchRes = imageSrc.match(context.settings.extension);
var ext = (matchRes != null) ? matchRes[0] : '';
var newImageSrc = imageSrc.replace(context.settings.extension, '');
newImageSrc = removeSuffix(newImageSrc, getUsedSuffix(newImageSrc, context));
newImageSrc += getSuffix(imgWidth, imgHeight, context) + ext;
return newImageSrc;
}
function onEntryMouseEnterForCaption (ev) {
var $caption = $(ev.currentTarget).find('.caption');
if (ev.data.settings.cssAnimation) {
$caption.addClass('caption-visible').removeClass('caption-hidden');
} else {
$caption.stop().fadeTo(ev.data.settings.captionSettings.animationDuration,
ev.data.settings.captionSettings.visibleOpacity);
}
}
function onEntryMouseLeaveForCaption (ev) {
var $caption = $(ev.currentTarget).find('.caption');
if (ev.data.settings.cssAnimation) {
$caption.removeClass('caption-visible').removeClass('caption-hidden');
} else {
$caption.stop().fadeTo(ev.data.settings.captionSettings.animationDuration,
ev.data.settings.captionSettings.nonVisibleOpacity);
}
}
function showImg($entry, callback, context) {
if (context.settings.cssAnimation) {
$entry.addClass('entry-visible');
callback();
} else {
$entry.stop().fadeTo(context.settings.imagesAnimationDuration, 1.0, callback);
}
}
function hideImgImmediately($entry, context) {
if (context.settings.cssAnimation) {
$entry.removeClass('entry-visible');
} else {
$entry.stop().fadeTo(0, 0);
}
}
function displayEntry($entry, x, y, imgWidth, imgHeight, rowHeight, context) {
var $image = $entry.find('img');
$image.css('width', imgWidth);
$image.css('height', imgHeight);
$image.css('margin-left', - imgWidth / 2);
$image.css('margin-top', - imgHeight / 2);
$entry.width(imgWidth);
$entry.height(rowHeight);
$entry.css('top', y);
$entry.css('left', x);
//DEBUG// console.log('displayEntry (w: ' + $image.width() + ' h: ' + $image.height());
// Image reloading for an high quality of thumbnails
var imageSrc = $image.attr('src');
var newImageSrc = newSrc(imageSrc, imgWidth, imgHeight, context);
$image.one('error', function () {
//DEBUG// console.log('revert the original image');
$image.attr('src', $image.data('jg.originalSrc')); //revert to the original thumbnail, we got it.
});
function loadNewImage() {
if (imageSrc !== newImageSrc) { //load the new image after the fadeIn
$image.attr('src', newImageSrc);
}
}
if ($image.data('jg.loaded') === 'skipped') {
$image.one('load', function() {
showImg($entry, loadNewImage, context);
$image.data('jg.loaded', 'loaded');
});
} else {
showImg($entry, loadNewImage, context);
}
// Captions ------------------------------
var captionMouseEvents = $entry.data('jg.captionMouseEvents');
if (context.settings.captions === true) {
var $imgCaption = $entry.find('.caption');
if ($imgCaption.length === 0) { // Create it if it doesn't exists
var caption = $image.attr('alt');
if (typeof caption === 'undefined') caption = $entry.attr('title');
if (typeof caption !== 'undefined') { // Create only we found something
$imgCaption = $('<div class="caption">' + caption + '</div>');
$entry.append($imgCaption);
}
}
// Create events (we check again the $imgCaption because it can be still inexistent)
if ($imgCaption.length !== 0) {
if (!context.settings.cssAnimation) {
$imgCaption.stop().fadeTo(context.settings.imagesAnimationDuration,
context.settings.captionSettings.nonVisibleOpacity);
}
if (typeof captionMouseEvents === 'undefined') {
captionMouseEvents = {
mouseenter: onEntryMouseEnterForCaption,
mouseleave: onEntryMouseLeaveForCaption
};
$entry.on('mouseenter', undefined, context, captionMouseEvents.mouseenter);
$entry.on('mouseleave', undefined, context, captionMouseEvents.mouseleave);
$entry.data('jg.captionMouseEvents', captionMouseEvents);
}
}
} else {
if (typeof captionMouseEvents !== 'undefined') {
$entry.off('mouseenter', undefined, context, captionMouseEvents.mouseenter);
$entry.off('mouseleave', undefined, context, captionMouseEvents.mouseleave);
$entry.removeData('jg.captionMouseEvents');
}
}
}
function prepareBuildingRow(context, isLastRow) {
var settings = context.settings;
var i, $entry, $image, imgAspectRatio, newImgW, newImgH, justify = true;
var minHeight = 0;
var availableWidth = context.galleryWidth - (
(context.buildingRow.entriesBuff.length - 1) * settings.margins);
var rowHeight = availableWidth / context.buildingRow.aspectRatio;
var justificable = context.buildingRow.width / availableWidth > settings.justifyThreshold;
//Skip the last row if we can't justify it and the lastRow == 'hide'
if (isLastRow && settings.lastRow === 'hide' && !justificable) {
for (i = 0; i < context.buildingRow.entriesBuff.length; i++) {
$entry = context.buildingRow.entriesBuff[i];
if (settings.cssAnimation)
$entry.removeClass('entry-visible');
else
$entry.stop().fadeTo(0, 0);
}
return -1;
}
// With lastRow = nojustify, justify if is justificable (the images will not become too big)
if (isLastRow && !justificable && settings.lastRow === 'nojustify') justify = false;
for (i = 0; i < context.buildingRow.entriesBuff.length; i++) {
$image = context.buildingRow.entriesBuff[i].find('img');
imgAspectRatio = $image.data('jg.imgw') / $image.data('jg.imgh');
if (justify) {
newImgW = rowHeight * imgAspectRatio;
newImgH = rowHeight;
/* With fixedHeight the newImgH must be greater than rowHeight.
In some cases here this is not satisfied (due to the justification).
But we comment it, because is better to have a shorter but justified row instead
to have a cropped image at the end. */
/*if (settings.fixedHeight && newImgH < settings.rowHeight) {
newImgW = settings.rowHeight * imgAspectRatio;
newImgH = settings.rowHeight;
}*/
} else {
newImgW = settings.rowHeight * imgAspectRatio;
newImgH = settings.rowHeight;
}
$image.data('jg.imgw', Math.ceil(newImgW));
$image.data('jg.imgh', Math.ceil(newImgH));
if (i === 0 || minHeight > newImgH) minHeight = newImgH;
}
if (settings.fixedHeight && minHeight > settings.rowHeight)
minHeight = settings.rowHeight;
return {minHeight: minHeight, justify: justify};
}
function rewind(context) {
context.lastAnalyzedIndex = -1;
context.buildingRow.entriesBuff = [];
context.buildingRow.aspectRatio = 0;
context.buildingRow.width = 0;
context.offY = 0;
}
function flushRow(context, isLastRow) {
var settings = context.settings;
var $entry, $image, minHeight, buildingRowRes, offX = 0;
//DEBUG// console.log('flush (isLastRow: ' + isLastRow + ')');
buildingRowRes = prepareBuildingRow(context, isLastRow);
minHeight = buildingRowRes.minHeight;
if (isLastRow && settings.lastRow === 'hide' && minHeight === -1) {
context.buildingRow.entriesBuff = [];
context.buildingRow.aspectRatio = 0;
context.buildingRow.width = 0;
return;
}
if (settings.maxRowHeight > 0 && settings.maxRowHeight < minHeight)
minHeight = settings.maxRowHeight;
else if (settings.maxRowHeight === 0 && (1.5 * settings.rowHeight) < minHeight)
minHeight = 1.5 * settings.rowHeight;
for (var i = 0; i < context.buildingRow.entriesBuff.length; i++) {
$entry = context.buildingRow.entriesBuff[i];
$image = $entry.find('img');
displayEntry($entry, offX, context.offY, $image.data('jg.imgw'),
$image.data('jg.imgh'), minHeight, context);
offX += $image.data('jg.imgw') + settings.margins;
}
//Gallery Height
context.$gallery.height(context.offY + minHeight +
(context.spinner.active ? context.spinner.$el.innerHeight() : 0)
);
if (!isLastRow || (minHeight <= context.settings.rowHeight && buildingRowRes.justify)) {
//Ready for a new row
context.offY += minHeight + context.settings.margins;
//DEBUG// console.log('minHeight: ' + minHeight + ' offY: ' + context.offY);
context.buildingRow.entriesBuff = []; //clear the array creating a new one
context.buildingRow.aspectRatio = 0;
context.buildingRow.width = 0;
context.$gallery.trigger('jg.rowflush');
}
}
function checkWidth(context) {
context.checkWidthIntervalId = setInterval(function () {
var galleryWidth = parseInt(context.$gallery.width(), 10);
if (context.galleryWidth !== galleryWidth) {
//DEBUG// console.log("resize. old: " + context.galleryWidth + " new: " + galleryWidth);
context.galleryWidth = galleryWidth;
rewind(context);
// Restart to analyze
startImgAnalyzer(context, true);
}
}, context.settings.refreshTime);
}
function startLoadingSpinnerAnimation(spinnerContext) {
clearInterval(spinnerContext.intervalId);
spinnerContext.intervalId = setInterval(function () {
if (spinnerContext.phase < spinnerContext.$points.length)
spinnerContext.$points.eq(spinnerContext.phase).fadeTo(spinnerContext.timeslot, 1);
else
spinnerContext.$points.eq(spinnerContext.phase - spinnerContext.$points.length)
.fadeTo(spinnerContext.timeslot, 0);
spinnerContext.phase = (spinnerContext.phase + 1) % (spinnerContext.$points.length * 2);
}, spinnerContext.timeslot);
}
function stopLoadingSpinnerAnimation(spinnerContext) {
clearInterval(spinnerContext.intervalId);
spinnerContext.intervalId = null;
}
function stopImgAnalyzerStarter(context) {
context.yield.flushed = 0;
if (context.imgAnalyzerTimeout !== null) clearTimeout(context.imgAnalyzerTimeout);
}
function startImgAnalyzer(context, isForResize) {
stopImgAnalyzerStarter(context);
context.imgAnalyzerTimeout = setTimeout(function () {
analyzeImages(context, isForResize);
}, 0.001);
analyzeImages(context, isForResize);
}
function analyzeImages(context, isForResize) {
/* //DEBUG//
var rnd = parseInt(Math.random() * 10000, 10);
console.log('analyzeImages ' + rnd + ' start');
console.log('images status: ');
for (var i = 0; i < context.entries.length; i++) {
var $entry = $(context.entries[i]);
var $image = $entry.find('img');
console.log(i + ' (alt: ' + $image.attr('alt') + 'loaded: ' + $image.data('jg.loaded') + ')');
}*/
/* The first row */
var settings = context.settings;
var isLastRow;
for (var i = context.lastAnalyzedIndex + 1; i < context.entries.length; i++) {
var $entry = $(context.entries[i]);
var $image = $entry.find('img');
if ($image.data('jg.loaded') === true || $image.data('jg.loaded') === 'skipped') {
isLastRow = i >= context.entries.length - 1;
var availableWidth = context.galleryWidth - (
(context.buildingRow.entriesBuff.length - 1) * settings.margins);
var imgAspectRatio = $image.data('jg.imgw') / $image.data('jg.imgh');
if (availableWidth / (context.buildingRow.aspectRatio + imgAspectRatio) < settings.rowHeight) {
flushRow(context, isLastRow);
if(++context.yield.flushed >= context.yield.every) {
//DEBUG// console.log("yield");
startImgAnalyzer(context, isForResize);
return;
}
}
context.buildingRow.entriesBuff.push($entry);
context.buildingRow.aspectRatio += imgAspectRatio;
context.buildingRow.width += imgAspectRatio * settings.rowHeight;
context.lastAnalyzedIndex = i;
} else if ($image.data('jg.loaded') !== 'error') {
return;
}
}
// Last row flush (the row is not full)
if (context.buildingRow.entriesBuff.length > 0) flushRow(context, true);
if (context.spinner.active) {
context.spinner.active = false;
context.$gallery.height(context.$gallery.height() - context.spinner.$el.innerHeight());
context.spinner.$el.detach();
stopLoadingSpinnerAnimation(context.spinner);
}
/* Stop, if there is, the timeout to start the analyzeImages.
This is because an image can be set loaded, and the timeout can be set,
but this image can be analyzed yet.
*/
stopImgAnalyzerStarter(context);
//On complete callback
if (!isForResize)
context.$gallery.trigger('jg.complete');
else
context.$gallery.trigger('jg.resize');
//DEBUG// console.log('analyzeImages ' + rnd + ' end');
}
function checkSettings (context) {
var settings = context.settings;
function checkSuffixesRange(range) {
if (typeof settings.sizeRangeSuffixes[range] !== 'string')
throw 'sizeRangeSuffixes.' + range + ' must be a string';
}
function checkOrConvertNumber(parent, settingName) {
if (typeof parent[settingName] === 'string') {
parent[settingName] = parseFloat(parent[settingName], 10);
if (isNaN(parent[settingName])) throw 'invalid number for ' + settingName;
} else if (typeof parent[settingName] === 'number') {
if (isNaN(parent[settingName])) throw 'invalid number for ' + settingName;
} else {
throw settingName + ' must be a number';
}
}
if (typeof settings.sizeRangeSuffixes !== 'object')
throw 'sizeRangeSuffixes must be defined and must be an object';
checkSuffixesRange('lt100');
checkSuffixesRange('lt240');
checkSuffixesRange('lt320');
checkSuffixesRange('lt500');
checkSuffixesRange('lt640');
checkSuffixesRange('lt1024');
checkOrConvertNumber(settings, 'rowHeight');
checkOrConvertNumber(settings, 'maxRowHeight');
if (settings.maxRowHeight > 0 &&
settings.maxRowHeight < settings.rowHeight) {
settings.maxRowHeight = settings.rowHeight;
}
checkOrConvertNumber(settings, 'margins');
if (settings.lastRow !== 'nojustify' &&
settings.lastRow !== 'justify' &&
settings.lastRow !== 'hide') {
throw 'lastRow must be "nojustify", "justify" or "hide"';
}
checkOrConvertNumber(settings, 'justifyThreshold');
if (settings.justifyThreshold < 0 || settings.justifyThreshold > 1)
throw 'justifyThreshold must be in the interval [0,1]';
if (typeof settings.cssAnimation !== 'boolean') {
throw 'cssAnimation must be a boolean';
}
checkOrConvertNumber(settings.captionSettings, 'animationDuration');
checkOrConvertNumber(settings, 'imagesAnimationDuration');
checkOrConvertNumber(settings.captionSettings, 'visibleOpacity');
if (settings.captionSettings.visibleOpacity < 0 || settings.captionSettings.visibleOpacity > 1)
throw 'captionSettings.visibleOpacity must be in the interval [0, 1]';
checkOrConvertNumber(settings.captionSettings, 'nonVisibleOpacity');
if (settings.captionSettings.visibleOpacity < 0 || settings.captionSettings.visibleOpacity > 1)
throw 'captionSettings.nonVisibleOpacity must be in the interval [0, 1]';
if (typeof settings.fixedHeight !== 'boolean') {
throw 'fixedHeight must be a boolean';
}
if (typeof settings.captions !== 'boolean') {
throw 'captions must be a boolean';
}
checkOrConvertNumber(settings, 'refreshTime');
if (typeof settings.randomize !== 'boolean') {
throw 'randomize must be a boolean';
}
}
return this.each(function (index, gallery) {
var $gallery = $(gallery);
$gallery.addClass('justified-gallery');
var context = $gallery.data('jg.context');
if (typeof context === 'undefined') {
if (typeof arg !== 'undefined' && arg !== null && typeof arg !== 'object')
throw 'The argument must be an object';
// Spinner init
var $spinner = $('<div class="spinner"><span></span><span></span><span></span></div>');
//Context init
context = {
settings : $.extend({}, defaults, arg),
imgAnalyzerTimeout : null,
entries : null,
buildingRow : {
entriesBuff : [],
width : 0,
aspectRatio : 0
},
lastAnalyzedIndex : -1,
yield : {
every : 2, /* do a flush every context.yield.every flushes (
* must be greater than 1, else the analyzeImages will loop */
flushed : 0 //flushed rows without a yield
},
offY : 0,
spinner : {
active : false,
phase : 0,
timeslot : 150,
$el : $spinner,
$points : $spinner.find('span'),
intervalId : null
},
checkWidthIntervalId : null,
galleryWidth : $gallery.width(),
$gallery : $gallery
};
$gallery.data('jg.context', context);
} else if (arg === 'norewind') {
/* Hide the image of the buildingRow to prevent strange effects when the row will be
re-justified again */
for (var i = 0; i < context.buildingRow.entriesBuff.length; i++) {
hideImgImmediately(context.buildingRow.entriesBuff[i], context);
}
// In this case we don't rewind, and analyze all the images
} else {
context.settings = $.extend({}, context.settings, arg);
rewind(context);
}
checkSettings(context);
context.entries = $gallery.find('> a, > div:not(.spinner, #page-end)').toArray();
if (context.entries.length === 0) return;
// Randomize
if (context.settings.randomize) {
context.entries.sort(function () { return Math.random() * 2 - 1; });
$.each(context.entries, function () {
$(this).appendTo($gallery);
});
}
var imagesToLoad = false;
$.each(context.entries, function (index, entry) {
var $entry = $(entry);
var $image = $entry.find('img');
if ($image.data('jg.loaded') !== true && $image.data('jg.loaded') !== 'skipped') {
// Link Rel global overwrite
if (context.settings.rel !== null) $entry.attr('rel', context.settings.rel);
// Link Target global overwrite
if (context.settings.target !== null) $entry.attr('target', context.settings.target);
// Image src
var imageSrc = (typeof $image.data('safe-src') !== 'undefined') ?
$image.data('safe-src') : $image.attr('src');
$image.data('jg.originalSrc', imageSrc);
$image.attr('src', imageSrc);
var width = parseInt($image.attr('width'), 10);
var height = parseInt($image.attr('height'), 10);
if(context.settings.waitThumbnailsLoad !== true && !isNaN(width) && !isNaN(height)) {
$image.data('jg.imgw', width);
$image.data('jg.imgh', height);
$image.data('jg.loaded', 'skipped');
startImgAnalyzer(context, false);
return true;
}
$image.data('jg.loaded', false);
imagesToLoad = true;
// Spinner start
if (context.spinner.active === false) {
context.spinner.active = true;
$gallery.append(context.spinner.$el);
$gallery.height(context.offY + context.spinner.$el.innerHeight());
startLoadingSpinnerAnimation(context.spinner);
}
/* Check if the image is loaded or not using another image object.
We cannot use the 'complete' image property, because some browsers,
with a 404 set complete = true */
var loadImg = new Image();
var $loadImg = $(loadImg);
$loadImg.one('load', function imgLoaded () {
//DEBUG// console.log('img load (alt: ' + $image.attr('alt') + ')');
$image.off('load error');
$image.data('jg.imgw', loadImg.width);
$image.data('jg.imgh', loadImg.height);
$image.data('jg.loaded', true);
startImgAnalyzer(context, false);
});
$loadImg.one('error', function imgLoadError () {
//DEBUG// console.log('img error (alt: ' + $image.attr('alt') + ')');
$image.off('load error');
$image.data('jg.loaded', 'error');
startImgAnalyzer(context, false);
});
loadImg.src = imageSrc;
}
});
if (!imagesToLoad) startImgAnalyzer(context, false);
checkWidth(context);
});
};
}(jQuery));
