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Fix coding style and improve comment in settings.js

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This commit is contained in:
Jonas Jenwald 2013-10-02 15:57:23 +02:00
parent d6ab0c61e8
commit 43b0b66ada
1 changed files with 26 additions and 16 deletions
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42
web/settings.js
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@ -18,10 +18,15 @@
'use strict'; 'use strict';
// Settings Manager - This is a utility for saving settings /**
// First we see if localStorage is available * Settings Manager - This is a utility for saving settings.
// If not, we use FUEL in FF *
// Use asyncStorage for B2G * The way that settings are stored depends on how PDF.js is built,
* for 'node make <flag>' the following cases exist:
* - FIREFOX or MOZCENTRAL - uses about:config.
* - B2G - uses asyncStorage.
* - GENERIC or CHROME - uses localStorage, if it is available.
*/
var Settings = (function SettingsClosure() { var Settings = (function SettingsClosure() {
//#if !(FIREFOX || MOZCENTRAL || B2G) //#if !(FIREFOX || MOZCENTRAL || B2G)
var isLocalStorageEnabled = (function localStorageEnabledTest() { var isLocalStorageEnabled = (function localStorageEnabledTest() {
@ -29,8 +34,8 @@ var Settings = (function SettingsClosure() {
// The additional localStorage call is to get around a FF quirk, see // The additional localStorage call is to get around a FF quirk, see
// bug #495747 in bugzilla // bug #495747 in bugzilla
try { try {
return 'localStorage' in window && window['localStorage'] !== null && return ('localStorage' in window && window['localStorage'] !== null &&
localStorage; localStorage);
} catch (e) { } catch (e) {
return false; return false;
} }
@ -55,36 +60,40 @@ var Settings = (function SettingsClosure() {
//#endif //#endif
//#if !(FIREFOX || MOZCENTRAL || B2G) //#if !(FIREFOX || MOZCENTRAL || B2G)
if (isLocalStorageEnabled) if (isLocalStorageEnabled) {
resolvePromise(localStorage.getItem('database')); resolvePromise(localStorage.getItem('database'));
}
//#endif //#endif
} }
Settings.prototype = { Settings.prototype = {
initialize: function settingsInitialize(database) { initialize: function settingsInitialize(database) {
database = JSON.parse(database); database = JSON.parse(database);
if (!('files' in database)) if (!('files' in database)) {
database.files = []; database.files = [];
if (database.files.length >= SETTINGS_MEMORY) }
if (database.files.length >= SETTINGS_MEMORY) {
database.files.shift(); database.files.shift();
}
var index; var index;
for (var i = 0, length = database.files.length; i < length; i++) { for (var i = 0, length = database.files.length; i < length; i++) {
var branch = database.files[i]; var branch = database.files[i];
if (branch.fingerprint == this.fingerprint) { if (branch.fingerprint === this.fingerprint) {
index = i; index = i;
break; break;
} }
} }
if (typeof index != 'number') if (typeof index !== 'number') {
index = database.files.push({fingerprint: this.fingerprint}) - 1; index = database.files.push({fingerprint: this.fingerprint}) - 1;
}
this.file = database.files[index]; this.file = database.files[index];
this.database = database; this.database = database;
}, },
set: function settingsSet(name, val) { set: function settingsSet(name, val) {
if (!this.initializedPromise.isResolved) if (!this.initializedPromise.isResolved) {
return; return;
}
var file = this.file; var file = this.file;
file[name] = val; file[name] = val;
var database = JSON.stringify(this.database); var database = JSON.stringify(this.database);
@ -98,15 +107,16 @@ var Settings = (function SettingsClosure() {
//#endif //#endif
//#if !(FIREFOX || MOZCENTRAL || B2G) //#if !(FIREFOX || MOZCENTRAL || B2G)
if (isLocalStorageEnabled) if (isLocalStorageEnabled) {
localStorage.setItem('database', database); localStorage.setItem('database', database);
}
//#endif //#endif
}, },
get: function settingsGet(name, defaultValue) { get: function settingsGet(name, defaultValue) {
if (!this.initializedPromise.isResolved) if (!this.initializedPromise.isResolved) {
return defaultValue; return defaultValue;
}
return this.file[name] || defaultValue; return this.file[name] || defaultValue;
} }
}; };