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(function() {
{%- include scripts/lib/swiper.js -%}
var SOURCES = window.TEXT_VARIABLES.sources;
window.Lazyload.js(SOURCES.jquery, function() {
var template =
'<div class="swiper gallery__swiper">' +
'<div class="swiper__wrapper">' +
'</div>' +
'<div class="swiper__button swiper__button--prev fas fa-chevron-left"></div>' +
'<div class="swiper__button swiper__button--next fas fa-chevron-right"></div>' +
'</div>';
function setState($item, zoom, translate) {
$item.css('transform', 'scale(' + zoom + ') translate(' + translate.x + 'px,' + translate.y + 'px)');
}
function Gallery(root, items) {
this.$root = $(root);
this.$swiper = null;
this.$swiperWrapper = null;
this.$activeItem = null;
this.$items = [];
this.contentWidth = 0;
this.contentHeight = 0;
this.swiper = null;
this.items = items;
this.disabled = false;
this.curIndex = 0;
this.touchCenter = null;
this.lastTouchCenter = null;
this.zoomRect = null;
this.lastZoomRect = null;
this.lastTranslate = null;
this.translate = null;
this.lastZoom = 1;
this.preZoom = 1;
this.zoom = 1;
}
Gallery.prototype.init = function() {
var i, item, items = this.items, size, self = this, touchstartFingerCount = 0;
this.$root.append(template);
this.$swiper = this.$root.find('.gallery__swiper');
this.$swiperWrapper = this.$root.find('.swiper__wrapper');
this.contentWidth = this.$swiperWrapper && this.$swiperWrapper.width();
this.contentHeight = this.$swiperWrapper && this.$swiperWrapper.height();
for (i = 0; i < items.length; i++) {
item = items[i];
size = this._calculateImageSize(item.w, item.h);
this.$items.push($(
'<div class="swiper__slide">' +
'<div class="gallery-item">' +
'<div class="gallery-item__content">' +
'<img src="' + item.src + '" style="width:' + size.w + 'px;height:' + size.h + 'px"/>' +
'</div>' +
'</div>' +
'</div>'
));
}
this.$swiperWrapper && this.$swiperWrapper.append(this.$items);
this.swiper = this.$swiper && this.$swiper.swiper({
onChangeEnd: function() {
self._handleChangeEnd.apply(self, Array.prototype.slice.call(arguments));
}
});
$(window).on('resize', function() {
if (self.disabled) { return; }
self._resizeImageSize();
});
// Char Code: 37 ⬅, 39 ➡
$(window).on('keyup', function(e) {
if (window.isFormElement(e.target || e.srcElement) || self.disabled) { return; }
if (e.which === 37) {
self.swiper && self.swiper.previous();
} else if (e.which === 39) {
self.swiper && self.swiper.next();
}
});
function getRect(touch0, touch1) {
return {
o: {
x: (touch0.pageX + touch1.pageX) / 2,
y: (touch0.pageY + touch1.pageY) / 2
},
w: Math.abs(touch0.pageX - touch1.pageX),
h: Math.abs(touch0.pageY - touch1.pageY)
};
}
function getTouches(e) {
return e.touches || e;
}
function getTouchesCount(e) {
if (e.touches) {
return e.touches.length;
} else {
return 1;
}
}
this.$swiperWrapper.on('touchstart', function(e) {
var touch0, touch1, rect;
touchstartFingerCount = getTouchesCount(e);
if (touchstartFingerCount > 1) {
touch0 = e.touches[0];
touch1 = e.touches[1];
rect = getRect(touch0, touch1);
self.lastZoomRect = { w: rect.w, h: rect.h };
self.lastTouchCenter = rect.o;
} else {
var touch = getTouches(e)[0];
self.lastTouchCenter = { x: touch.pageX, y: touch.pageY };
}
});
this.$swiperWrapper.on('touchmove', function(e) {
if (touchstartFingerCount === getTouchesCount(e)) {
if (touchstartFingerCount > 1) {
var touch0 = e.touches[0];
var touch1 = e.touches[1];
var rect = getRect(touch0, touch1);
self.zoomRect = { w: rect.w, h: rect.h };
self.touchCenter = rect.o;
self._zoom(); self._translate();
setState(self.$activeItem, self.zoom, self.translate);
} else {
var touch = getTouches(e)[0];
self.touchCenter = { x: touch.pageX, y: touch.pageY };
self._translate();
setState(self.$activeItem, self.zoom, self.translate);
}
}
});
this.$swiperWrapper.on('touchend', function(e) {
self.lastZoom = self.zoom;
self.lastTranslate = self.translate;
touchstartFingerCount = 0;
});
this.$root.on('touchmove', function(e) {
if (self.disabled) { return; }
e.preventDefault();
});
};
Gallery.prototype._translate = function() {
this.translate = this.touchCenter && this.lastTouchCenter && this.lastTranslate ? {
x: (this.touchCenter.x - this.lastTouchCenter.x) / this.zoom + this.lastTranslate.x,
y: (this.touchCenter.y - this.lastTouchCenter.y) / this.zoom + this.lastTranslate.y
} : { x: 0, y: 0 };
}
Gallery.prototype._zoom = function() {
this.zoom = (this.zoomRect.w + this.zoomRect.h) / (this.lastZoomRect.w + this.lastZoomRect.h) * this.lastZoom;
this.zoom > 1 ? this.$activeItem.addClass('zoom') : this.$activeItem.removeClass('zoom');
this.preZoom = this.zoom;
}
Gallery.prototype._calculateImageSize = function(w, h) {
var scale = 1;
if (this.contentWidth > 0 && this.contentHeight > 0 && w > 0 && h > 0) {
scale = Math.min(
Math.min(w, this.contentWidth) / w,
Math.min(h, this.contentHeight) / h);
}
return { w: Math.floor(w * scale), h: Math.floor(h * scale) };
};
Gallery.prototype._resizeImageSize = function() {
var i, $item, $items = this.$items, item, size;
this.contentWidth = this.$swiperWrapper && this.$swiperWrapper.width();
this.contentHeight = this.$swiperWrapper && this.$swiperWrapper.height();
if ($items.length < 1) { return; }
for (i = 0; i < $items.length; i++) {
item = this.items[i], $item = $items[i];
size = this._calculateImageSize(item.w, item.h);
item.width = size.w; item.height = size.h;
$item && $item.find('img').css({ width: size.w, height: size.h });
}
};
Gallery.prototype._handleChangeEnd = function(index, $dom, preIndex, $preDom) {
this.curIndex = index;
this.lastZoomRect = null; this.lastZoomRect = null;
this.lastTranslate = this.translate = { x: 0, y:0 };
this.lastZoom = this.preZoom = this.zoom = 1;
this.$activeItem = $dom.find('.gallery-item__content');
setState($preDom.find('.gallery-item__content'), this.zoom, this.translate);
};
Gallery.prototype.refresh = function() {
this.swiper && this.swiper.refresh();
this._resizeImageSize();
};
Gallery.prototype.setOptions = function(options) {
this.disabled = options.disabled;
this.swiper && this.swiper.setOptions(options);
};
window.Gallery = Gallery;
});
})();
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