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reading & writing firefox preferences (nsIPrefService)

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  1. /*e.g.
  2.  
  3. Pref.setIntPref('browser.link','open_newwindow',9);
  4. Pref.getIntPref('browser.link','open_newwindow')
  5. 	*/
  6. var Pref = {
  7.     get psvc() {
  8.         return Components.classes["@mozilla.org/preferences-service;1"].getService(Components.interfaces.nsIPrefService);
  9.     },
  10.     _get_branch: function(branch) {
  11.         return this.psvc.getBranch(branch+".");
  12.     },
  13.     getIntPref: function(b,prefName) {
  14.         try {
  15.             return this._get_branch(b).getIntPref(prefName);
  16.         } catch(e) {
  17.             Components.utils.reportError(e);
  18.             return null;
  19.         }
  20.     },
  21.     setIntPref: function(b,prefName, value) {
  22.         try {
  23.             this._get_branch(b).setIntPref(prefName, value);
  24.         } catch(e) {
  25.             Components.utils.reportError(e);
  26.         }
  27.     },
  28.     getCharPref: function(b,prefName) {
  29.         try {
  30.             return this._get_branch(b).getCharPref(prefName);
  31.         } catch(e) {
  32.             Components.utils.reportError(e);
  33.             return null;
  34.         }
  35.     },
  36.     setCharPref: function(b,prefName, value) {
  37.         try {
  38.             this._get_branch(b).setCharPref(prefName, value);
  39.         } catch(e) {
  40.             Components.utils.reportError(e);
  41.         }
  42.     },
  43.     getBoolPref: function(b,prefName) {
  44.         try {
  45.             return this._get_branch(b).getBoolPref(prefName);
  46.         } catch(e) {
  47.             Components.utils.reportError(e);
  48.             return null;
  49.         }
  50.     },
  51.     setBoolPref: function(b,prefName, value) {
  52.         try {
  53.             this._get_branch(b).setBoolPref(prefName, value);
  54.         } catch(e) {
  55.             Components.utils.reportError(e);
  56.         }
  57.     },
  58.     getFilePref: function(b,prefName) {
  59.         try {
  60.             var store = im_Pref.getBoolPref("store-in-profile");
  61.             if (store && !oldpref) {
  62.                 var ds = imns.Cc["@mozilla.org/file/directory_service;1"].getService(imns.Ci.nsIProperties);
  63.                 var profdir = ds.get("ProfD", imns.Ci.nsILocalFile);
  64.                 profdir.append("iMacros");
  65.                 switch (prefName) {
  66.                 case "defdownpath":
  67.                     profdir.append("Downloads");
  68.                     break;
  69.                 case "defdatapath":
  70.                     profdir.append("Datasources");
  71.                     break;
  72.                 case "deflogpath":
  73.                     break;
  74.                 case "defsavepath":
  75.                     profdir.append("Macros");
  76.                     break;
  77.                 default:
  78.                     return this._get_branch(b).getComplexValue(prefName, imns.Ci.nsILocalFile);
  79.                 }
  80.                 return profdir;
  81.             } else {
  82.                 if (oldpref) return this._get_branch(oldpref).getCharPref(prefName);
  83.                 else return this._get_branch(oldpref).getComplexValue(prefName, imns.Ci.nsILocalFile);
  84.             }
  85.         } catch(e) {
  86.             Components.utils.reportError(e);
  87.             return null;
  88.         }
  89.     },
  90.     setFilePref: function(b,prefName, value) {
  91.         try {
  92.             this._get_branch(b).setComplexValue(prefName, imns.Ci.nsILocalFile, value);
  93.         } catch(e) {
  94.             Components.utils.reportError(e);
  95.         }
  96.     },
  97.     getStringPref: function(b,prefName) {
  98.         try {
  99.             return this._get_branch(b).getComplexValue(prefName, imns.Ci.nsISupportsString).data;
  100.         } catch(e) {
  101.             Components.utils.reportError(e);
  102.             return null;
  103.         }
  104.     },
  105.     setStringPref: function(b,prefName, value) {
  106.         try {
  107.             this._get_branch(b).setComplexValue(prefName, imns.Ci.nsISupportsString, value);
  108.         } catch(e) {
  109.             Components.utils.reportError(e);
  110.         }
  111.     },
  112.     clearPref: function(b,prefName) {
  113.         try {
  114.             this._get_branch(b).clearUserPref(prefName);
  115.         } catch(e) {
  116.             Components.utils.reportError(e);
  117.         }
  118.     }
  119. };

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