Sakurai/pdf.js
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Convert let to const if possible in src/display/display_utils.js

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Finally, `var` usage is removed.
This commit is contained in:
Tim van der Meij 2019-03-01 22:28:19 +01:00
parent c43396c2b7
commit 87a70f3359
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GPG Key ID: 8C3FD2925A5F2762
1 changed files with 26 additions and 28 deletions
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52
src/display/display_utils.js
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@ -12,6 +12,7 @@
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* eslint no-var: error */
import {
assert, CMapCompressionType, removeNullCharacters, stringToBytes,
@ -24,10 +25,10 @@ const SVG_NS = 'http://www.w3.org/2000/svg';
class DOMCanvasFactory {
create(width, height) {
if (width <= 0 || height <= 0) {
throw new Error('invalid canvas size');
throw new Error('Invalid canvas size');
}
let canvas = document.createElement('canvas');
let context = canvas.getContext('2d');
const canvas = document.createElement('canvas');
const context = canvas.getContext('2d');
canvas.width = width;
canvas.height = height;
return {
@ -38,10 +39,10 @@ class DOMCanvasFactory {
reset(canvasAndContext, width, height) {
if (!canvasAndContext.canvas) {
throw new Error('canvas is not specified');
throw new Error('Canvas is not specified');
}
if (width <= 0 || height <= 0) {
throw new Error('invalid canvas size');
throw new Error('Invalid canvas size');
}
canvasAndContext.canvas.width = width;
canvasAndContext.canvas.height = height;
@ -49,7 +50,7 @@ class DOMCanvasFactory {
destroy(canvasAndContext) {
if (!canvasAndContext.canvas) {
throw new Error('canvas is not specified');
throw new Error('Canvas is not specified');
}
// Zeroing the width and height cause Firefox to release graphics
// resources immediately, which can greatly reduce memory consumption.
@ -137,7 +138,7 @@ class DOMSVGFactory {
create(width, height) {
assert(width > 0 && height > 0, 'Invalid SVG dimensions');
let svg = document.createElementNS(SVG_NS, 'svg:svg');
const svg = document.createElementNS(SVG_NS, 'svg:svg');
svg.setAttribute('version', '1.1');
svg.setAttribute('width', width + 'px');
svg.setAttribute('height', height + 'px');
@ -194,8 +195,8 @@ class PageViewport {
// creating transform to convert pdf coordinate system to the normal
// canvas like coordinates taking in account scale and rotation
let centerX = (viewBox[2] + viewBox[0]) / 2;
let centerY = (viewBox[3] + viewBox[1]) / 2;
const centerX = (viewBox[2] + viewBox[0]) / 2;
const centerY = (viewBox[3] + viewBox[1]) / 2;
let rotateA, rotateB, rotateC, rotateD;
rotation = rotation % 360;
rotation = rotation < 0 ? rotation + 360 : rotation;
@ -287,9 +288,9 @@ class PageViewport {
* @see {@link convertToViewportPoint}
*/
convertToViewportRectangle(rect) {
let tl = Util.applyTransform([rect[0], rect[1]], this.transform);
let br = Util.applyTransform([rect[2], rect[3]], this.transform);
return [tl[0], tl[1], br[0], br[1]];
const topLeft = Util.applyTransform([rect[0], rect[1]], this.transform);
const bottomRight = Util.applyTransform([rect[2], rect[3]], this.transform);
return [topLeft[0], topLeft[1], bottomRight[0], bottomRight[1]];
}
/**
@ -306,7 +307,7 @@ class PageViewport {
}
}
var RenderingCancelledException = (function RenderingCancelledException() {
const RenderingCancelledException = (function RenderingCancelledException() {
function RenderingCancelledException(msg, type) {
this.message = msg;
this.type = type;
@ -332,7 +333,7 @@ const LinkTargetStringMap = [
'_self',
'_blank',
'_parent',
'_top'
'_top',
];
/**
@ -355,7 +356,7 @@ function addLinkAttributes(link, { url, target, rel, } = {}) {
if (url) {
const LinkTargetValues = Object.values(LinkTarget);
let targetIndex =
const targetIndex =
LinkTargetValues.includes(target) ? target : LinkTarget.NONE;
link.target = LinkTargetStringMap[targetIndex];
@ -365,10 +366,9 @@ function addLinkAttributes(link, { url, target, rel, } = {}) {
// Gets the file name from a given URL.
function getFilenameFromUrl(url) {
var anchor = url.indexOf('#');
var query = url.indexOf('?');
var end = Math.min(
anchor > 0 ? anchor : url.length,
const anchor = url.indexOf('#');
const query = url.indexOf('?');
const end = Math.min(anchor > 0 ? anchor : url.length,
query > 0 ? query : url.length);
return url.substring(url.lastIndexOf('/', end) + 1, end);
}
@ -407,19 +407,17 @@ class StatTimer {
}
toString() {
let times = this.times;
// Find the longest name for padding purposes.
let out = '', longest = 0;
for (let i = 0, ii = times.length; i < ii; ++i) {
let name = times[i]['name'];
for (const time of this.times) {
const name = time.name;
if (name.length > longest) {
longest = name.length;
}
}
for (let i = 0, ii = times.length; i < ii; ++i) {
let span = times[i];
let duration = span.end - span.start;
out += `${span['name'].padEnd(longest)} ${duration}ms\n`;
for (const time of this.times) {
const duration = time.end - time.start;
out += `${time.name.padEnd(longest)} ${duration}ms\n`;
}
return out;
}
@ -466,7 +464,7 @@ function isValidFetchUrl(url, baseUrl) {
function loadScript(src) {
return new Promise((resolve, reject) => {
let script = document.createElement('script');
const script = document.createElement('script');
script.src = src;
script.onload = resolve;