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Introduce (some) private properties/methods in the PDFObjects class

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This ensures that the underlying data cannot be accessed directly, from the outside, since that's definately not intended here.
Note that we expose `PDFObjects`-instances, via the `commonObjs` and `objs` properties, on the `PDFPageProxy`-instances hence these changes really cannot hurt.
This commit is contained in:
Jonas Jenwald 2022-02-20 12:17:10 +01:00
parent fbed707592
commit beecde3229
1 changed files with 13 additions and 15 deletions
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28
src/display/api.js
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@ -3049,19 +3049,17 @@ class WorkerTransport {
* @ignore
*/
class PDFObjects {
constructor() {
this._objs = Object.create(null);
}
#objs = Object.create(null);
/**
* Ensures there is an object defined for `objId`.
* @private
*/
_ensureObj(objId) {
if (this._objs[objId]) {
return this._objs[objId];
#ensureObj(objId) {
const obj = this.#objs[objId];
if (obj) {
return obj;
}
return (this._objs[objId] = {
return (this.#objs[objId] = {
capability: createPromiseCapability(),
data: null,
resolved: false,
@ -3080,30 +3078,30 @@ class PDFObjects {
// If there is a callback, then the get can be async and the object is
// not required to be resolved right now.
if (callback) {
this._ensureObj(objId).capability.promise.then(callback);
this.#ensureObj(objId).capability.promise.then(callback);
return null;
}
// If there isn't a callback, the user expects to get the resolved data
// directly.
const obj = this._objs[objId];
const obj = this.#objs[objId];
// If there isn't an object yet or the object isn't resolved, then the
// data isn't ready yet!
if (!obj || !obj.resolved) {
if (!obj?.resolved) {
throw new Error(`Requesting object that isn't resolved yet ${objId}.`);
}
return obj.data;
}
has(objId) {
const obj = this._objs[objId];
const obj = this.#objs[objId];
return obj?.resolved || false;
}
/**
* Resolves the object `objId` with optional `data`.
*/
resolve(objId, data) {
const obj = this._ensureObj(objId);
resolve(objId, data = null) {
const obj = this.#ensureObj(objId);
obj.resolved = true;
obj.data = data;
@ -3111,7 +3109,7 @@ class PDFObjects {
}
clear() {
this._objs = Object.create(null);
this.#objs = Object.create(null);
}
}