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previewer.js
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previewer.js
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/*!
* previewer.js v0.2.0
* https://github.com/ajayns/previewer
*
* Copyright (c) 2017 Ajay NS
* Released under the MIT license
*/
// PREVIEWER CLASS
function Previewer() {
// Previewer html template
this.template = '<div id="previewer">' +
' <div id="previewer-fade"></div>' +
' <img src="" alt="" id="previewer-img">' +
' <div id="previewer-close">' +
' <span>×</span>' +
' </div>' +
' </div>';
// Add it to the body on init
document.body.innerHTML += this.template;
// Define function to close preview
this.closeWindow = function () {
document.getElementById("previewer").style.display = "none";
document.getElementById("previewer-img").src = "";
document.body.style.overflow = "scroll";
};
var self = this;
var current = 0;
// Call previewer on image click
var images = document.querySelectorAll(".preview-image, .preview-images img");
for (i = 0; i < images.length; i++) {
(function(i) {
images[i].addEventListener('click', function () {
var imgSrc = (this.dataset["previewer"] === undefined) ? this.getAttribute("src"): this.dataset["previewer"];
document.getElementById("previewer-img").src = imgSrc;
document.getElementById("previewer").style.display = "block";
current = i;
});
})(i)
}
// Close previewer when clicked
document.getElementById("previewer-close").addEventListener("click", this.closeWindow);
document.getElementById("previewer-fade").addEventListener("click", this.closeWindow);
// Keyboard controls
document.onkeydown = keyCtrl;
function keyCtrl(e) {
e = e || window.event;
// Close preview on esc key
if (e.keyCode == '27') {
self.closeWindow();
}
// Next image on arrow right
if (e.keyCode == '39') {
if (current < images.length-1)
document.getElementById("previewer-img").src = (images[++current].dataset["previewer"] === undefined) ? images[++current].getAttribute("src"): images[++current].dataset["previewer"];
}
// Previous image on arrow left
if (e.keyCode == "37") {
if (current > 0)
document.getElementById("previewer-img").src = (images[--current].dataset["previewer"] === undefined) ? images[--current].getAttribute("src"): images[--current].dataset["previewer"];
}
}
}