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/* global Flash */
export default class BlobViewer {
constructor() {
BlobViewer.initAuxiliaryViewer();
this.initMainViewers();
}
static initAuxiliaryViewer() {
const auxiliaryViewer = document.querySelector('.blob-viewer[data-type="auxiliary"]');
if (!auxiliaryViewer) return;
BlobViewer.loadViewer(auxiliaryViewer);
}
initMainViewers() {
this.$fileHolder = $('.file-holder');
if (!this.$fileHolder.length) return;
this.switcher = document.querySelector('.js-blob-viewer-switcher');
this.switcherBtns = document.querySelectorAll('.js-blob-viewer-switch-btn');
this.copySourceBtn = document.querySelector('.js-copy-blob-source-btn');
this.simpleViewer = this.$fileHolder[0].querySelector('.blob-viewer[data-type="simple"]');
this.richViewer = this.$fileHolder[0].querySelector('.blob-viewer[data-type="rich"]');
this.initBindings();
this.switchToInitialViewer();
}
switchToInitialViewer() {
const initialViewer = this.$fileHolder[0].querySelector('.blob-viewer:not(.hidden)');
let initialViewerName = initialViewer.getAttribute('data-type');
if (this.switcher && location.hash.indexOf('#L') === 0) {
initialViewerName = 'simple';
}
this.switchToViewer(initialViewerName);
}
initBindings() {
if (this.switcherBtns.length) {
Array.from(this.switcherBtns)
.forEach((el) => {
el.addEventListener('click', this.switchViewHandler.bind(this));
});
}
if (this.copySourceBtn) {
this.copySourceBtn.addEventListener('click', () => {
if (this.copySourceBtn.classList.contains('disabled')) return;
this.switchToViewer('simple');
});
}
}
switchViewHandler(e) {
const target = e.currentTarget;
e.preventDefault();
this.switchToViewer(target.getAttribute('data-viewer'));
}
toggleCopyButtonState() {
if (!this.copySourceBtn) return;
if (this.simpleViewer.getAttribute('data-loaded')) {
this.copySourceBtn.setAttribute('title', 'Copy source to clipboard');
this.copySourceBtn.classList.remove('disabled');
} else if (this.activeViewer === this.simpleViewer) {
this.copySourceBtn.setAttribute('title', 'Wait for the source to load to copy it to the clipboard');
this.copySourceBtn.classList.add('disabled');
} else {
this.copySourceBtn.setAttribute('title', 'Switch to the source to copy it to the clipboard');
this.copySourceBtn.classList.add('disabled');
}
$(this.copySourceBtn).tooltip('fixTitle');
}
switchToViewer(name) {
const newViewer = this.$fileHolder[0].querySelector(`.blob-viewer[data-type='${name}']`);
if (this.activeViewer === newViewer) return;
const oldButton = document.querySelector('.js-blob-viewer-switch-btn.active');
const newButton = document.querySelector(`.js-blob-viewer-switch-btn[data-viewer='${name}']`);
const oldViewer = this.$fileHolder[0].querySelector(`.blob-viewer:not([data-type='${name}'])`);
if (oldButton) {
oldButton.classList.remove('active');
}
if (newButton) {
newButton.classList.add('active');
newButton.blur();
}
if (oldViewer) {
oldViewer.classList.add('hidden');
}
newViewer.classList.remove('hidden');
this.activeViewer = newViewer;
this.toggleCopyButtonState();
BlobViewer.loadViewer(newViewer)
.then((viewer) => {
$(viewer).syntaxHighlight();
this.$fileHolder.trigger('highlight:line');
gl.utils.handleLocationHash();
this.toggleCopyButtonState();
})
.catch(() => new Flash('Error loading viewer'));
}
static loadViewer(viewerParam) {
const viewer = viewerParam;
const url = viewer.getAttribute('data-url');
return new Promise((resolve, reject) => {
if (!url || viewer.getAttribute('data-loaded') || viewer.getAttribute('data-loading')) {
resolve(viewer);
return;
}
viewer.setAttribute('data-loading', 'true');
$.ajax({
url,
dataType: 'JSON',
})
.fail(reject)
.done((data) => {
viewer.innerHTML = data.html;
viewer.setAttribute('data-loaded', 'true');
resolve(viewer);
});
});
}
}
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