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Introduces LegacyPromise; polyfills DOM Promise

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This commit is contained in:
Yury Delendik 2014-01-03 18:17:05 -06:00
parent 122cd150d4
commit 5bf3e44e30
20 changed files with 263 additions and 156 deletions
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32
web/preferences.js
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@ -14,7 +14,7 @@
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* globals DEFAULT_PREFERENCES, PDFJS, isLocalStorageEnabled */
/* globals DEFAULT_PREFERENCES, PDFJS, isLocalStorageEnabled, Promise */
'use strict';
@ -23,7 +23,9 @@
var Preferences = (function PreferencesClosure() {
function Preferences() {
this.prefs = {};
this.isInitializedPromiseResolved = false;
this.initializedPromise = this.readFromStorage().then(function(prefObj) {
this.isInitializedPromiseResolved = true;
if (prefObj) {
this.prefs = prefObj;
}
@ -36,19 +38,19 @@ var Preferences = (function PreferencesClosure() {
},
readFromStorage: function Preferences_readFromStorage() {
var readFromStoragePromise = new PDFJS.Promise();
var readFromStoragePromise = Promise.resolve();
return readFromStoragePromise;
},
reset: function Preferences_reset() {
if (this.initializedPromise.isResolved) {
if (this.isInitializedPromiseResolved) {
this.prefs = {};
this.writeToStorage(this.prefs);
}
},
set: function Preferences_set(name, value) {
if (!this.initializedPromise.isResolved) {
if (!this.isInitializedPromiseResolved) {
return;
} else if (DEFAULT_PREFERENCES[name] === undefined) {
console.error('Preferences_set: \'' + name + '\' is undefined.');
@ -79,7 +81,7 @@ var Preferences = (function PreferencesClosure() {
if (defaultPref === undefined) {
console.error('Preferences_get: \'' + name + '\' is undefined.');
return;
} else if (this.initializedPromise.isResolved) {
} else if (this.isInitializedPromiseResolved) {
var pref = this.prefs[name];
if (pref !== undefined) {
@ -99,10 +101,11 @@ var Preferences = (function PreferencesClosure() {
//};
//
//Preferences.prototype.readFromStorage = function() {
// var readFromStoragePromise = new PDFJS.Promise();
// asyncStorage.getItem('preferences', function(prefString) {
// var readPrefs = JSON.parse(prefString);
// readFromStoragePromise.resolve(readPrefs);
// var readFromStoragePromise = new Promise(function (resolve) {
// asyncStorage.getItem('preferences', function(prefString) {
// var readPrefs = JSON.parse(prefString);
// resolve(readPrefs);
// });
// });
// return readFromStoragePromise;
//};
@ -116,11 +119,12 @@ Preferences.prototype.writeToStorage = function(prefObj) {
};
Preferences.prototype.readFromStorage = function() {
var readFromStoragePromise = new PDFJS.Promise();
if (isLocalStorageEnabled) {
var readPrefs = JSON.parse(localStorage.getItem('preferences'));
readFromStoragePromise.resolve(readPrefs);
}
var readFromStoragePromise = new Promise(function (resolve) {
if (isLocalStorageEnabled) {
var readPrefs = JSON.parse(localStorage.getItem('preferences'));
resolve(readPrefs);
}
});
return readFromStoragePromise;
};
//#endif