diff --git a/src/components/slideshow/slideshow.js b/src/components/slideshow/slideshow.js index 6ff88a00c9..b027c203a5 100644 --- a/src/components/slideshow/slideshow.js +++ b/src/components/slideshow/slideshow.js @@ -2,9 +2,20 @@ * Image viewer component * @module components/slideshow/slideshow */ -define(['dialogHelper', 'inputManager', 'connectionManager', 'layoutManager', 'focusManager', 'browser', 'apphost', 'css!./style', 'material-icons', 'paper-icon-button-light'], function (dialogHelper, inputManager, connectionManager, layoutManager, focusManager, browser, appHost) { +define(['dialogHelper', 'inputManager', 'connectionManager', 'layoutManager', 'focusManager', 'browser', 'apphost', 'dom', 'css!./style', 'material-icons', 'paper-icon-button-light'], function (dialogHelper, inputManager, connectionManager, layoutManager, focusManager, browser, appHost, dom) { 'use strict'; + /** + * Name of transition event. + */ + const transitionEndEventName = dom.whichTransitionEvent(); + + /** + * Flag to use fake image to fix blurry zoomed image. + * At least WebKit doesn't restore quality for zoomed images. + */ + const useFakeZoomImage = browser.safari; + /** * Retrieves an item's image URL from the API. * @param {object|string} item - Item used to generate the image URL. @@ -240,6 +251,41 @@ define(['dialogHelper', 'inputManager', 'connectionManager', 'layoutManager', 'f } } + /** + * Handles zoom changes. + */ + function onZoomChange(scale, imageEl, slideEl) { + const zoomImage = slideEl.querySelector('.swiper-zoom-fakeimg'); + + if (zoomImage) { + zoomImage.style.width = zoomImage.style.height = scale * 100 + '%'; + + if (scale > 1) { + if (zoomImage.classList.contains('swiper-zoom-fakeimg-hidden')) { + // Await for Swiper style changes + setTimeout(() => { + const callback = () => { + imageEl.removeEventListener(transitionEndEventName, callback); + zoomImage.classList.remove('swiper-zoom-fakeimg-hidden'); + }; + + // Swiper set 'transition-duration: 300ms' for auto zoom + // and 'transition-duration: 0s' for touch zoom + const transitionDuration = parseFloat(imageEl.style.transitionDuration.replace(/[a-z]/i, '')); + + if (transitionDuration > 0) { + imageEl.addEventListener(transitionEndEventName, callback); + } else { + callback(); + } + }, 0); + } + } else { + zoomImage.classList.add('swiper-zoom-fakeimg-hidden'); + } + } + } + /** * Initializes the Swiper instance and binds the relevant events. * @param {HTMLElement} dialog - Element containing the dialog. @@ -260,8 +306,7 @@ define(['dialogHelper', 'inputManager', 'connectionManager', 'layoutManager', 'f loop: false, zoom: { minRatio: 1, - toggle: true, - containerClass: 'slider-zoom-container' + toggle: true }, autoplay: !options.interactive, keyboard: { @@ -288,6 +333,10 @@ define(['dialogHelper', 'inputManager', 'connectionManager', 'layoutManager', 'f swiperInstance.on('autoplayStart', onAutoplayStart); swiperInstance.on('autoplayStop', onAutoplayStop); + + if (useFakeZoomImage) { + swiperInstance.on('zoomChange', onZoomChange); + } }); } @@ -328,7 +377,10 @@ define(['dialogHelper', 'inputManager', 'connectionManager', 'layoutManager', 'f function getSwiperSlideHtmlFromSlide(item) { var html = ''; html += '
'; - html += '
'; + html += '
'; + if (useFakeZoomImage) { + html += `
`; + } html += ''; html += '
'; if (item.title || item.subtitle) { diff --git a/src/components/slideshow/style.css b/src/components/slideshow/style.css index f1fea508d7..af50eb9cd7 100644 --- a/src/components/slideshow/style.css +++ b/src/components/slideshow/style.css @@ -40,16 +40,6 @@ text-shadow: 3px 3px 0 #000, -1px -1px 0 #000, 1px -1px 0 #000, -1px 1px 0 #000, 1px 1px 0 #000; } -.swiper-slide-img { - max-height: 100%; - max-width: 100%; - display: flex; - justify-content: center; - align-items: center; - text-align: center; - margin: auto; -} - .slideshowButtonIcon { color: #fff; opacity: 0.7; @@ -135,13 +125,18 @@ color: #ccc; } -.swiper-slide { - display: flex; - flex-direction: column; +.swiper-zoom-fakeimg { + position: absolute; + top: 50%; + left: 50%; + transform: translate(-50%, -50%); + background-position: 50% 50%; + background-repeat: no-repeat; + background-size: contain; + z-index: 1; + pointer-events: none; } -.slider-zoom-container { - margin: auto; - max-height: 100%; - max-width: 100%; +.swiper-zoom-fakeimg-hidden { + display: none; }