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Refactor the ViewHistory to utilize async methods rather than manually returning Promises

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This commit is contained in:
Jonas Jenwald 2018-07-30 17:07:21 +02:00
parent 233b3274bf
commit a60963f882
1 changed files with 38 additions and 48 deletions
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86
web/view_history.js
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@ -54,64 +54,54 @@ class ViewHistory {
});
}
_writeToStorage() {
return new Promise((resolve) => {
let databaseStr = JSON.stringify(this.database);
async _writeToStorage() {
let databaseStr = JSON.stringify(this.database);
if (typeof PDFJSDev !== 'undefined' &&
PDFJSDev.test('FIREFOX || MOZCENTRAL')) {
sessionStorage.setItem('pdfjs.history', databaseStr);
} else {
localStorage.setItem('pdfjs.history', databaseStr);
}
resolve();
});
if (typeof PDFJSDev !== 'undefined' &&
PDFJSDev.test('FIREFOX || MOZCENTRAL')) {
sessionStorage.setItem('pdfjs.history', databaseStr);
return;
}
localStorage.setItem('pdfjs.history', databaseStr);
}
_readFromStorage() {
return new Promise(function(resolve) {
if (typeof PDFJSDev !== 'undefined' &&
PDFJSDev.test('FIREFOX || MOZCENTRAL')) {
resolve(sessionStorage.getItem('pdfjs.history'));
} else {
resolve(localStorage.getItem('pdfjs.history'));
}
});
async _readFromStorage() {
if (typeof PDFJSDev !== 'undefined' &&
PDFJSDev.test('FIREFOX || MOZCENTRAL')) {
return sessionStorage.getItem('pdfjs.history');
}
return localStorage.getItem('pdfjs.history');
}
set(name, val) {
return this._initializedPromise.then(() => {
this.file[name] = val;
return this._writeToStorage();
});
async set(name, val) {
await this._initializedPromise;
this.file[name] = val;
return this._writeToStorage();
}
setMultiple(properties) {
return this._initializedPromise.then(() => {
for (let name in properties) {
this.file[name] = properties[name];
}
return this._writeToStorage();
});
async setMultiple(properties) {
await this._initializedPromise;
for (let name in properties) {
this.file[name] = properties[name];
}
return this._writeToStorage();
}
get(name, defaultValue) {
return this._initializedPromise.then(() => {
async get(name, defaultValue) {
await this._initializedPromise;
let val = this.file[name];
return val !== undefined ? val : defaultValue;
}
async getMultiple(properties) {
await this._initializedPromise;
let values = Object.create(null);
for (let name in properties) {
let val = this.file[name];
return val !== undefined ? val : defaultValue;
});
}
getMultiple(properties) {
return this._initializedPromise.then(() => {
let values = Object.create(null);
for (let name in properties) {
let val = this.file[name];
values[name] = val !== undefined ? val : properties[name];
}
return values;
});
values[name] = val !== undefined ? val : properties[name];
}
return values;
}
}