gecko-dev/b2g/components/DirectoryProvider.js

81 lines
2.5 KiB
JavaScript

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
const Cc = Components.classes;
const Ci = Components.interfaces;
const Cu = Components.utils;
const Cr = Components.results;
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
Cu.import("resource://gre/modules/Services.jsm");
const XRE_OS_UPDATE_APPLY_TO_DIR = "OSUpdApplyToD"
const LOCAL_DIR = "/data/local";
XPCOMUtils.defineLazyServiceGetter(Services, "env",
"@mozilla.org/process/environment;1",
"nsIEnvironment");
function DirectoryProvider() {
}
DirectoryProvider.prototype = {
classID: Components.ID("{9181eb7c-6f87-11e1-90b1-4f59d80dd2e5}"),
QueryInterface: XPCOMUtils.generateQI([Ci.nsIDirectoryServiceProvider]),
getFile: function dp_getFile(prop, persistent) {
#ifdef MOZ_WIDGET_GONK
let localProps = ["cachePDir", "webappsDir", "PrefD", "indexedDBPDir",
"permissionDBPDir", "UpdRootD"];
if (localProps.indexOf(prop) != -1) {
let file = Cc["@mozilla.org/file/local;1"]
.createInstance(Ci.nsILocalFile)
file.initWithPath(LOCAL_DIR);
persistent.value = true;
return file;
} else if (prop == "coreAppsDir") {
let file = Cc["@mozilla.org/file/local;1"].createInstance(Ci.nsIFile)
file.initWithPath("/system/b2g");
persistent.value = true;
return file;
} else if (prop == XRE_OS_UPDATE_APPLY_TO_DIR) {
return this.getOSUpdateApplyToDir(persistent);
}
#endif
return null;
},
getOSUpdateApplyToDir: function dp_getOSUpdateApplyToDir(persistent) {
// TODO add logic to check available storage space,
// and iterate through pref(s) to find alternative dirs if
// necessary.
let path = Services.env.get("EXTERNAL_STORAGE");
if (!path) {
path = LOCAL_PATH;
}
let dir = Cc["@mozilla.org/file/local;1"]
.createInstance(Ci.nsILocalFile)
dir.initWithPath(path);
if (!dir.exists() && path != LOCAL_PATH) {
// Fallback to LOCAL_PATH if we didn't fallback earlier
dir.initWithPath(LOCAL_PATH);
if (!dir.exists()) {
throw Cr.NS_ERROR_FILE_NOT_FOUND;
}
}
dir.appendRelativePath("updates");
persistent.value = false;
return dir;
}
};
const NSGetFactory = XPCOMUtils.generateNSGetFactory([DirectoryProvider]);