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( function () {
function TiledGalleryCollection() {
this.galleries = [];
this.findAndSetupNewGalleries();
}
TiledGalleryCollection.prototype.findAndSetupNewGalleries = function () {
var self = this;
var unresizedGalleries = document.querySelectorAll( '.tiled-gallery.tiled-gallery-unresized' );
Array.prototype.forEach.call( unresizedGalleries, function ( el ) {
self.galleries.push( new TiledGallery( el ) );
} );
};
TiledGalleryCollection.prototype.resizeAll = function () {
Array.prototype.forEach.call( this.galleries, function ( gallery ) {
gallery.resize();
} );
};
function TiledGallery( galleryElem ) {
this.gallery = galleryElem;
this.addCaptionEvents();
// Resize when initialized to fit the gallery to window dimensions
this.resize();
// Displays the gallery and prevents it from being initialized again
this.gallery.classList.remove( 'tiled-gallery-unresized' );
}
/**
* Selector for all resizeable elements inside a Tiled Gallery
*/
TiledGallery.prototype.resizeableElementsSelector =
'.gallery-row, .gallery-group, .tiled-gallery-item img';
/**
* Story
*/
TiledGallery.prototype.addCaptionEvents = function () {
// Hide captions
var galleryCaptions = this.gallery.querySelectorAll( '.tiled-gallery-caption' );
Array.prototype.forEach.call( galleryCaptions, function ( el ) {
el.style.display = 'none';
} );
var mouseHoverHandler = function ( e ) {
var itemEl = e.target.closest( '.tiled-gallery-item' );
var displayValue = 'mouseover' === e.type ? 'block' : 'none';
if ( itemEl ) {
var itemCaption = itemEl.querySelector( '.tiled-gallery-caption' );
if ( itemCaption ) {
itemCaption.style.display = displayValue;
}
}
};
// Add hover effects to bring the caption up and down for each item
this.gallery.addEventListener( 'mouseover', mouseHoverHandler );
this.gallery.addEventListener( 'mouseout', mouseHoverHandler );
};
TiledGallery.prototype.getExtraDimension = function ( el, attribute, mode ) {
if ( mode === 'horizontal' ) {
var left = attribute === 'border' ? 'borderLeftWidth' : attribute + 'Left';
var right = attribute === 'border' ? 'borderRightWidth' : attribute + 'Right';
return ( parseInt( el.style[ left ], 10 ) || 0 ) + ( parseInt( el.style[ right ], 10 ) || 0 );
} else if ( mode === 'vertical' ) {
var top = attribute === 'border' ? 'borderTopWidth' : attribute + 'Top';
var bottom = attribute === 'border' ? 'borderBottomWidth' : attribute + 'Bottom';
return ( parseInt( el.style[ top ], 10 ) || 0 ) + ( parseInt( el.style[ bottom ], 10 ) || 0 );
} else {
return 0;
}
};
TiledGallery.prototype.resize = function () {
// Resize everything in the gallery based on the ratio of the current content width
// to the original content width;
var originalWidth = parseInt( this.gallery.dataset.originalWidth, 10 );
var currentWidth = parseFloat(
getComputedStyle( this.gallery.parentNode, null ).width.replace( 'px', '' )
);
var resizeRatio = Math.min( 1, currentWidth / originalWidth );
var self = this;
var resizableElements = this.gallery.querySelectorAll( this.resizeableElementsSelector );
Array.prototype.forEach.call( resizableElements, function ( el ) {
var marginWidth = self.getExtraDimension( el, 'margin', 'horizontal' );
var marginHeight = self.getExtraDimension( el, 'margin', 'vertical' );
var paddingWidth = self.getExtraDimension( el, 'padding', 'horizontal' );
var paddingHeight = self.getExtraDimension( el, 'padding', 'vertical' );
var borderWidth = self.getExtraDimension( el, 'border', 'horizontal' );
var borderHeight = self.getExtraDimension( el, 'border', 'vertical' );
// Take all outer dimensions into account when resizing so that images
// scale with constant empty space between them
var outerWidth =
parseInt( el.dataset.originalWidth, 10 ) + paddingWidth + borderWidth + marginWidth;
var outerHeight =
parseInt( el.dataset.originalHeight, 10 ) + paddingHeight + borderHeight + marginHeight;
// Subtract margins so that images don't overflow on small browser windows
el.style.width = Math.floor( resizeRatio * outerWidth ) - marginWidth + 'px';
el.style.height = Math.floor( resizeRatio * outerHeight ) - marginHeight + 'px';
} );
};
/**
* Resizing logic
*/
var requestAnimationFrame =
window.requestAnimationFrame ||
window.mozRequestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.msRequestAnimationFrame;
function attachResizeInAnimationFrames( tiledGalleries ) {
var resizing = false;
var resizeTimeout = null;
function handleFrame() {
tiledGalleries.resizeAll();
if ( resizing ) {
requestAnimationFrame( handleFrame );
}
}
window.addEventListener( 'resize', function () {
clearTimeout( resizeTimeout );
if ( ! resizing ) {
requestAnimationFrame( handleFrame );
}
resizing = true;
resizeTimeout = setTimeout( function () {
resizing = false;
}, 15 );
} );
}
function attachPlainResize( tiledGalleries ) {
window.addEventListener( 'resize', function () {
tiledGalleries.resizeAll();
} );
}
/**
* Ready, set...
*/
function ready( fn ) {
if ( document.readyState !== 'loading' ) {
fn();
} else {
document.addEventListener( 'DOMContentLoaded', fn );
}
}
ready( function () {
var tiledGalleries = new TiledGalleryCollection();
document.body.addEventListener( 'is.post-load', function () {
tiledGalleries.findAndSetupNewGalleries();
} );
if ( typeof jQuery === 'function' ) {
jQuery( document ).on( 'page-rendered.wpcom-newdash', function () {
tiledGalleries.findAndSetupNewGalleries();
} );
}
// Chrome is a unique snow flake and will start lagging on occasion
// It helps if we only resize on animation frames
//
// For other browsers it seems like there is no lag even if we resize every
// time there is an event
if ( window.chrome && requestAnimationFrame ) {
attachResizeInAnimationFrames( tiledGalleries );
} else {
attachPlainResize( tiledGalleries );
}
if ( 'undefined' !== typeof wp && wp.customize && wp.customize.selectiveRefresh ) {
wp.customize.selectiveRefresh.bind( 'partial-content-rendered', function ( placement ) {
if ( wp.isJetpackWidgetPlaced( placement, 'gallery' ) ) {
tiledGalleries.findAndSetupNewGalleries();
}
} );
}
} );
} )();
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GitWeb