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Change var to let, and use object destructuring, in a couple of previously class converted web/*.js files

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Note that these files were among the first to be converted to ES6 classes, so it probably makes sense to do another pass to bring them inline with the most recent ES6 conversions.
This commit is contained in:
Jonas Jenwald 2017-06-30 12:55:22 +02:00
parent 699f3392e4
commit 614e8cf295
9 changed files with 113 additions and 118 deletions
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38
web/pdf_presentation_mode.js
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@ -43,12 +43,12 @@ class PDFPresentationMode {
/**
* @param {PDFPresentationModeOptions} options
*/
constructor(options) {
this.container = options.container;
this.viewer = options.viewer || options.container.firstElementChild;
this.pdfViewer = options.pdfViewer;
this.eventBus = options.eventBus;
var contextMenuItems = options.contextMenuItems || null;
constructor({ container, viewer = null, pdfViewer, eventBus,
contextMenuItems = null, }) {
this.container = container;
this.viewer = viewer || container.firstElementChild;
this.pdfViewer = pdfViewer;
this.eventBus = eventBus;
this.active = false;
this.args = null;
@ -119,9 +119,9 @@ class PDFPresentationMode {
evt.preventDefault();
var delta = normalizeWheelEventDelta(evt);
var currentTime = (new Date()).getTime();
var storedTime = this.mouseScrollTimeStamp;
let delta = normalizeWheelEventDelta(evt);
let currentTime = (new Date()).getTime();
let storedTime = this.mouseScrollTimeStamp;
// If we've already switched page, avoid accidentally switching again.
if (currentTime > storedTime &&
@ -136,9 +136,9 @@ class PDFPresentationMode {
this.mouseScrollDelta += delta;
if (Math.abs(this.mouseScrollDelta) >= PAGE_SWITCH_THRESHOLD) {
var totalDelta = this.mouseScrollDelta;
let totalDelta = this.mouseScrollDelta;
this._resetMouseScrollState();
var success = totalDelta > 0 ? this._goToPreviousPage()
let success = totalDelta > 0 ? this._goToPreviousPage()
: this._goToNextPage();
if (success) {
this.mouseScrollTimeStamp = currentTime;
@ -155,7 +155,7 @@ class PDFPresentationMode {
* @private
*/
_goToPreviousPage() {
var page = this.pdfViewer.currentPageNumber;
let page = this.pdfViewer.currentPageNumber;
// If we're at the first page, we don't need to do anything.
if (page <= 1) {
return false;
@ -168,7 +168,7 @@ class PDFPresentationMode {
* @private
*/
_goToNextPage() {
var page = this.pdfViewer.currentPageNumber;
let page = this.pdfViewer.currentPageNumber;
// If we're at the last page, we don't need to do anything.
if (page >= this.pdfViewer.pagesCount) {
return false;
@ -249,7 +249,7 @@ class PDFPresentationMode {
* @private
*/
_exit() {
var page = this.pdfViewer.currentPageNumber;
let page = this.pdfViewer.currentPageNumber;
this.container.classList.remove(ACTIVE_SELECTOR);
// Ensure that the correct page is scrolled into view when exiting
@ -283,7 +283,7 @@ class PDFPresentationMode {
if (evt.button === 0) {
// Enable clicking of links in presentation mode. Note: only links
// pointing to destinations in the current PDF document work.
var isInternalLink = (evt.target.href &&
let isInternalLink = (evt.target.href &&
evt.target.classList.contains('internalLink'));
if (!isInternalLink) {
// Unless an internal link was clicked, advance one page.
@ -378,10 +378,10 @@ class PDFPresentationMode {
if (this.touchSwipeState === null) {
return;
}
var delta = 0;
var dx = this.touchSwipeState.endX - this.touchSwipeState.startX;
var dy = this.touchSwipeState.endY - this.touchSwipeState.startY;
var absAngle = Math.abs(Math.atan2(dy, dx));
let delta = 0;
let dx = this.touchSwipeState.endX - this.touchSwipeState.startX;
let dy = this.touchSwipeState.endY - this.touchSwipeState.startY;
let absAngle = Math.abs(Math.atan2(dy, dx));
if (Math.abs(dx) > SWIPE_MIN_DISTANCE_THRESHOLD &&
(absAngle <= SWIPE_ANGLE_THRESHOLD ||
absAngle >= (Math.PI - SWIPE_ANGLE_THRESHOLD))) {