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Remove the remaining unnecessary closures in the src/core/primitives.js file

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This commit is contained in:
Jonas Jenwald 2023-04-21 18:43:13 +02:00
parent e304423ba1
commit 9cb3236ac0
1 changed files with 53 additions and 82 deletions
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135
src/core/primitives.js
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@ -18,61 +18,49 @@ import { assert, shadow, unreachable } from "../shared/util.js";
const CIRCULAR_REF = Symbol("CIRCULAR_REF");
const EOF = Symbol("EOF");
const Name = (function NameClosure() {
let nameCache = Object.create(null);
let CmdCache = Object.create(null);
let NameCache = Object.create(null);
let RefCache = Object.create(null);
// eslint-disable-next-line no-shadow
class Name {
constructor(name) {
if (
(typeof PDFJSDev === "undefined" || PDFJSDev.test("TESTING")) &&
typeof name !== "string"
) {
unreachable('Name: The "name" must be a string.');
}
this.name = name;
}
function clearPrimitiveCaches() {
CmdCache = Object.create(null);
NameCache = Object.create(null);
RefCache = Object.create(null);
}
static get(name) {
// eslint-disable-next-line no-restricted-syntax
return nameCache[name] || (nameCache[name] = new Name(name));
}
static _clearCache() {
nameCache = Object.create(null);
class Name {
constructor(name) {
if (
(typeof PDFJSDev === "undefined" || PDFJSDev.test("TESTING")) &&
typeof name !== "string"
) {
unreachable('Name: The "name" must be a string.');
}
this.name = name;
}
return Name;
})();
static get(name) {
// eslint-disable-next-line no-restricted-syntax
return NameCache[name] || (NameCache[name] = new Name(name));
}
}
const Cmd = (function CmdClosure() {
let cmdCache = Object.create(null);
// eslint-disable-next-line no-shadow
class Cmd {
constructor(cmd) {
if (
(typeof PDFJSDev === "undefined" || PDFJSDev.test("TESTING")) &&
typeof cmd !== "string"
) {
unreachable('Cmd: The "cmd" must be a string.');
}
this.cmd = cmd;
}
static get(cmd) {
// eslint-disable-next-line no-restricted-syntax
return cmdCache[cmd] || (cmdCache[cmd] = new Cmd(cmd));
}
static _clearCache() {
cmdCache = Object.create(null);
class Cmd {
constructor(cmd) {
if (
(typeof PDFJSDev === "undefined" || PDFJSDev.test("TESTING")) &&
typeof cmd !== "string"
) {
unreachable('Cmd: The "cmd" must be a string.');
}
this.cmd = cmd;
}
return Cmd;
})();
static get(cmd) {
// eslint-disable-next-line no-restricted-syntax
return CmdCache[cmd] || (CmdCache[cmd] = new Cmd(cmd));
}
}
const nonSerializable = function nonSerializableClosure() {
return nonSerializable; // Creating closure on some variable.
@ -276,38 +264,27 @@ class Dict {
}
}
const Ref = (function RefClosure() {
let refCache = Object.create(null);
// eslint-disable-next-line no-shadow
class Ref {
constructor(num, gen) {
this.num = num;
this.gen = gen;
}
toString() {
// This function is hot, so we make the string as compact as possible.
// |this.gen| is almost always zero, so we treat that case specially.
if (this.gen === 0) {
return `${this.num}R`;
}
return `${this.num}R${this.gen}`;
}
static get(num, gen) {
const key = gen === 0 ? `${num}R` : `${num}R${gen}`;
// eslint-disable-next-line no-restricted-syntax
return refCache[key] || (refCache[key] = new Ref(num, gen));
}
static _clearCache() {
refCache = Object.create(null);
}
class Ref {
constructor(num, gen) {
this.num = num;
this.gen = gen;
}
return Ref;
})();
toString() {
// This function is hot, so we make the string as compact as possible.
// |this.gen| is almost always zero, so we treat that case specially.
if (this.gen === 0) {
return `${this.num}R`;
}
return `${this.num}R${this.gen}`;
}
static get(num, gen) {
const key = gen === 0 ? `${num}R` : `${num}R${gen}`;
// eslint-disable-next-line no-restricted-syntax
return RefCache[key] || (RefCache[key] = new Ref(num, gen));
}
}
// The reference is identified by number and generation.
// This structure stores only one instance of the reference.
@ -402,12 +379,6 @@ function isRefsEqual(v1, v2) {
return v1.num === v2.num && v1.gen === v2.gen;
}
function clearPrimitiveCaches() {
Cmd._clearCache();
Name._clearCache();
Ref._clearCache();
}
export {
CIRCULAR_REF,
clearPrimitiveCaches,