Evergreen/staff_client/chrome/content/evergreen/util/file.js

   1 sdump('D_TRACE','Loading file.js\n');
   2
   3 var dirService = Components.classes["@mozilla.org/file/directory_service;1"].
   4         getService( Components.interfaces.nsIProperties );
   5
   6 //////////////////////////////////////////////////////////////////////////////////////////////////////
   7
   8 function set_object_in_file(file,obj) {
   9         try {
  10                 if (typeof(file)=='string') file = get_file( file );
  11                 var f = create_output_stream(file);
  12                 var obj_json = js2JSON( obj );
  13                 f.write( obj_json, obj_json.length ); f.close();
  14         } catch(E) {
  15                 sdump('D_FILE', 'set_object_in_file: ' + js2JSON(E) + '\n');
  16                 throw(E);
  17         }
  18 }
  19
  20 function get_object_in_file(file) {
  21         try {
  22                 if (typeof(file)=='string') file = get_file( file );
  23                 if (file.exists()) {
  24                         var f = create_input_stream(file);
  25                         var obj = JSON2js( f.read(-1) );
  26                         f.close();
  27                         return obj;
  28                 } else {
  29                         throw('File does not exist. ');
  30                 }
  31         } catch(E) {
  32                 sdump('D_FILE', 'get_object_in_file: ' + js2JSON(E) + '\n');
  33                 throw(E);
  34         }
  35 }
  36
  37 //////////////////////////////////////////////////////////////////////////////////////////////////////
  38
  39 function create_input_stream(file) {
  40         try {
  41                 if (typeof(file)=='string') file = get_file( file );
  42                 var f = Components.classes["@mozilla.org/network/file-input-stream;1"]
  43                         .createInstance(Components.interfaces.nsIFileInputStream);
  44                 if (file && file.exists()) {
  45                         f.init(file, 0x01, 0, 0);
  46                         var s = Components.classes["@mozilla.org/scriptableinputstream;1"]
  47                                 .createInstance(Components.interfaces.nsIScriptableInputStream);
  48                         if (f) {
  49                                 s.init(f);
  50                                 return s;
  51                         }
  52                 }
  53         } catch(E) {
  54                 sdump('D_ERROR', E);
  55         }
  56         return null;
  57 }
  58
  59 function create_output_stream(file) {
  60         try {
  61                 if (typeof(file)=='string') file = get_file( file );
  62                 var f = Components.classes["@mozilla.org/network/file-output-stream;1"]
  63                         .createInstance(Components.interfaces.nsIFileOutputStream);
  64                 if (file) {
  65                         if (! file.exists()) file.create( 0, 0640 );
  66                         f.init(file, 0x02 | 0x08 | 0x20, 0644, 0);
  67                         return f;
  68                 }
  69         } catch(E) {
  70                 sdump('D_ERROR', E);
  71         }
  72         return null;
  73 }
  74
  75 function get_file( fname ) {
  76         try {
  77                 file = dirService.get( "AChrom",  Components.interfaces.nsIFile );
  78                 file.append(mw.myPackageDir); file.append("content"); file.append("conf"); file.append(fname);
  79                 sdump('D_FILE','get_file( ' + fname + ').path = ' + file.path + '\n');
  80                 return file;
  81         } catch(E) {
  82                 sdump('D_ERROR', E);
  83                 return null;
  84         }
  85 }