1 files changed, 85 insertions, 0 deletions
diff --git a/modules/firefox.home/chrome/utils/xPref.jsm b/modules/firefox.home/chrome/utils/xPref.jsm
new file mode 100644
index 0000000..dcb44b3
--- /dev/null
+++ b/modules/firefox.home/chrome/utils/xPref.jsm
@@ -0,0 +1,85 @@
+let EXPORTED_SYMBOLS = ['xPref'];
+
+var xPref = {
+  get: function(prefPath, def = false, valueIfUndefined, setDefault = true) {
+    let sPrefs = def ?
+      Services.prefs.getDefaultBranch(null) :
+      Services.prefs;
+
+    try {
+      switch (sPrefs.getPrefType(prefPath)) {
+        case 0:
+          if (valueIfUndefined != undefined)
+            return this.set(prefPath, valueIfUndefined, setDefault);
+          else
+            return undefined;
+        case 32:
+          return sPrefs.getStringPref(prefPath);
+        case 64:
+          return sPrefs.getIntPref(prefPath);
+        case 128:
+          return sPrefs.getBoolPref(prefPath);
+      }
+    } catch (ex) {
+      return undefined;
+    }
+    return;
+  },
+
+  set: function(prefPath, value, def = false) {
+    let sPrefs = def ?
+      Services.prefs.getDefaultBranch(null) :
+      Services.prefs;
+
+    try {
+      switch (typeof value) {
+        case 'string':
+          return sPrefs.setStringPref(prefPath, value) || value;
+        case 'number':
+          return sPrefs.setIntPref(prefPath, value) || value;
+        case 'boolean':
+          return sPrefs.setBoolPref(prefPath, value) || value;
+      }
+    } catch (e) { console.error(e) }
+    return;
+  },
+
+  lock: function(prefPath, value) {
+    let sPrefs = Services.prefs;
+    this.lockedBackupDef[prefPath] = this.get(prefPath, true);
+    if (sPrefs.prefIsLocked(prefPath))
+      sPrefs.unlockPref(prefPath);
+
+    this.set(prefPath, value, true);
+    sPrefs.lockPref(prefPath);
+  },
+
+  lockedBackupDef: {},
+
+  unlock: function(prefPath) {
+    Services.prefs.unlockPref(prefPath);
+    let bkp = this.lockedBackupDef[prefPath];
+    if (bkp == undefined)
+      Services.prefs.deleteBranch(prefPath);
+    else
+      this.set(prefPath, bkp, true);
+  },
+
+  clear: Services.prefs.clearUserPref,
+
+  addListener: function(prefPath, trat) {
+    this.observer = function(aSubject, aTopic, prefPath) {
+      return trat(xPref.get(prefPath), prefPath);
+    }
+
+    Services.prefs.addObserver(prefPath, this.observer);
+    return {
+      prefPath,
+      observer: this.observer
+    };
+  },
+
+  removeListener: function(obs) {
+    Services.prefs.removeObserver(obs.prefPath, obs.observer);
+  }
+}