NetNewsWire/iOS/Resources/main_ios.js

140 lines
5.0 KiB
JavaScript

var activeImageViewer = null;
class ImageViewer {
constructor(img) {
this.img = img;
this.loadingInterval = null;
this.activityIndicator = "data:image/svg+xml;base64,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";
}
isLoaded() {
return this.img.classList.contains("nnwLoaded");
}
clicked() {
this.showLoadingIndicator();
if (this.isLoaded()) {
this.showViewer();
} else {
var callback = () => {
if (this.isLoaded()) {
clearInterval(this.loadingInterval);
this.showViewer();
}
}
this.loadingInterval = setInterval(callback, 100);
}
}
cancel() {
clearInterval(this.loadingInterval);
this.hideLoadingIndicator();
}
showViewer() {
this.hideLoadingIndicator();
var canvas = document.createElement("canvas");
canvas.width = this.img.naturalWidth;
canvas.height = this.img.naturalHeight;
canvas.getContext("2d").drawImage(this.img, 0, 0);
const rect = this.img.getBoundingClientRect();
const message = {
x: rect.x,
y: rect.y,
width: rect.width,
height: rect.height,
imageTitle: this.img.title,
imageURL: canvas.toDataURL(),
};
var jsonMessage = JSON.stringify(message);
window.webkit.messageHandlers.imageWasClicked.postMessage(jsonMessage);
}
hideImage() {
this.img.style.opacity = 0;
}
showImage() {
this.img.style.opacity = 1
}
showLoadingIndicator() {
var wrapper = document.createElement("div");
wrapper.classList.add("activityIndicatorWrap");
this.img.parentNode.insertBefore(wrapper, this.img);
wrapper.appendChild(this.img);
var activityIndicatorImg = document.createElement("img");
activityIndicatorImg.classList.add("activityIndicator");
activityIndicatorImg.style.opacity = 0;
activityIndicatorImg.src = this.activityIndicator;
wrapper.appendChild(activityIndicatorImg);
activityIndicatorImg.style.opacity = 1;
}
hideLoadingIndicator() {
var wrapper = this.img.parentNode;
if (wrapper.classList.contains("activityIndicatorWrap")) {
var wrapperParent = wrapper.parentNode;
wrapperParent.insertBefore(this.img, wrapper);
wrapperParent.removeChild(wrapper);
}
}
static init() {
cancelImageLoad();
// keep track of when an image has finished downloading for ImageViewer
document.querySelectorAll("img").forEach(element => {
element.onload = function() {
this.classList.add("nnwLoaded");
}
});
// Add the click listener for images
window.onclick = function(event) {
if (event.target.matches("img")) {
if (activeImageViewer && activeImageViewer.img === event.target) {
cancelImageLoad();
} else {
cancelImageLoad();
activeImageViewer = new ImageViewer(event.target);
activeImageViewer.clicked();
}
}
}
}
}
function cancelImageLoad() {
if (activeImageViewer) {
activeImageViewer.cancel();
activeImageViewer = null;
}
}
function hideClickedImage() {
if (activeImageViewer) {
activeImageViewer.hideImage();
}
}
// Used to animate the transition from a fullscreen image
function showClickedImage() {
if (activeImageViewer) {
activeImageViewer.showImage();
}
window.webkit.messageHandlers.imageWasShown.postMessage("");
}
function postRenderProcessing() {
ImageViewer.init();
}
window.addEventListener('DOMContentLoaded', (event) => {
window.webkit.messageHandlers.domContentLoaded.postMessage("");
});