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Super_GM_setValue_and_GM_getValue.js

Extends the GM_setValue and GM_getValue functions for any javascript variable type.

Tento skript by neměl být instalován přímo. Jedná se o knihovnu, kterou by měly jiné skripty využívat pomocí meta příkazu // @require https://update.greatest.deepsurf.us/scripts/622/1786/Super_GM_setValue_and_GM_getValuejs.js 

  1. /***************************************************************************************
  2. ****************************************************************************************
  3. *****   Super GM_setValue and GM_getValue.js
  4. *****
  5. *****   This library extends the Greasemonkey GM_setValue and GM_getValue functions to
  6. *****   handle any javascript variable type.
  7. *****
  8. *****   Add it to your GM script with:
  9. *****       // @require http://userscripts.org/scripts/source/107941.user.js
  10. *****
  11. *****
  12. *****   Usage:
  13. *****       GM_SuperValue.set           (varName, varValue);
  14. *****       var x = GM_SuperValue.get   (varName, defaultValue);
  15. *****
  16. *****   Test mode:
  17. *****       GM_SuperValue.runTestCases  (bUseConsole);
  18. *****
  19. */
  20. // ==UserScript==
  21. // @name            Super_GM_setValue_and_GM_getValue.js
  22. // @description     Extends the GM_setValue and GM_getValue functions for any javascript variable type.
  23. // @namespace       userscripts.org/users/158640
  24. // @version 1
  25. // ==/UserScript==
  26.  
  27. var GM_SuperValue = new function () {
  28.  
  29.     var JSON_MarkerStr  = 'json_val: ';
  30.     var FunctionMarker  = 'function_code: ';
  31.  
  32.     function ReportError (msg) {
  33.         if (console && console.error)
  34.             console.log (msg);
  35.         else
  36.             throw new Error (msg);
  37.     }
  38.  
  39.     //--- Check that the environment is proper.
  40.     if (typeof GM_setValue != "function")
  41.         ReportError ('This library requires Greasemonkey! GM_setValue is missing.');
  42.     if (typeof GM_getValue != "function")
  43.         ReportError ('This library requires Greasemonkey! GM_getValue is missing.');
  44.  
  45.  
  46.     /*--- set ()
  47.         GM_setValue (http://wiki.greasespot.net/GM_setValue) only stores:
  48.         strings, booleans, and integers (a limitation of using Firefox
  49.         preferences for storage).
  50.  
  51.         This function extends that to allow storing any data type.
  52.  
  53.         Parameters:
  54.             varName
  55.                 String: The unique (within this script) name for this value.
  56.                 Should be restricted to valid Javascript identifier characters.
  57.             varValue
  58.                 Any valid javascript value.  Just note that it is not advisable to
  59.                 store too much data in the Firefox preferences.
  60.  
  61.         Returns:
  62.             undefined
  63.     */
  64.     this.set = function (varName, varValue) {
  65.  
  66.         if ( ! varName) {
  67.             ReportError ('Illegal varName sent to GM_SuperValue.set().');
  68.             return;
  69.         }
  70.         if (/[^\w _-]/.test (varName) ) {
  71.             ReportError ('Suspect, probably illegal, varName sent to GM_SuperValue.set().');
  72.         }
  73.  
  74.         switch (typeof varValue) {
  75.             case 'undefined':
  76.                 ReportError ('Illegal varValue sent to GM_SuperValue.set().');
  77.             break;
  78.             case 'boolean':
  79.             case 'string':
  80.                 //--- These 2 types are safe to store, as is.
  81.                 GM_setValue (varName, varValue);
  82.             break;
  83.             case 'number':
  84.                 /*--- Numbers are ONLY safe if they are integers.
  85.                     Note that hex numbers, EG 0xA9, get converted
  86.                     and stored as decimals, EG 169, automatically.
  87.                     That's a feature of JavaScript.
  88.  
  89.                     Also, only a 32-bit, signed integer is allowed.
  90.                     So we only process +/-2147483647 here.
  91.                 */
  92.                 if (varValue === parseInt (varValue)  &&  Math.abs (varValue) < 2147483647)
  93.                 {
  94.                     GM_setValue (varName, varValue);
  95.                     break;
  96.                 }
  97.             case 'object':
  98.                 /*--- For all other cases (but functions), and for
  99.                     unsafe numbers, store the value as a JSON string.
  100.                 */
  101.                 var safeStr = JSON_MarkerStr + JSON.stringify (varValue);
  102.                 GM_setValue (varName, safeStr);
  103.             break;
  104.             case 'function':
  105.                 /*--- Functions need special handling.
  106.                 */
  107.                 var safeStr = FunctionMarker + varValue.toString ();
  108.                 GM_setValue (varName, safeStr);
  109.             break;
  110.  
  111.             default:
  112.                 ReportError ('Unknown type in GM_SuperValue.set()!');
  113.             break;
  114.         }
  115.     }//-- End of set()
  116.  
  117.  
  118.     /*--- get ()
  119.         GM_getValue (http://wiki.greasespot.net/GM_getValue) only retieves:
  120.         strings, booleans, and integers (a limitation of using Firefox
  121.         preferences for storage).
  122.  
  123.         This function extends that to allow retrieving any data type -- as
  124.         long as it was stored with GM_SuperValue.set().
  125.  
  126.         Parameters:
  127.             varName
  128.                 String: The property name to get. See GM_SuperValue.set for details.
  129.             defaultValue
  130.                 Optional. Any value to be returned, when no value has previously
  131.                 been set.
  132.  
  133.         Returns:
  134.             When this name has been set...
  135.                 The variable or function value as previously set.
  136.  
  137.             When this name has not been set, and a default is provided...
  138.                 The value passed in as a default
  139.  
  140.             When this name has not been set, and default is not provided...
  141.                 undefined
  142.     */
  143.     this.get = function (varName, defaultValue) {
  144.  
  145.         if ( ! varName) {
  146.             ReportError ('Illegal varName sent to GM_SuperValue.get().');
  147.             return;
  148.         }
  149.         if (/[^\w _-]/.test (varName) ) {
  150.             ReportError ('Suspect, probably illegal, varName sent to GM_SuperValue.get().');
  151.         }
  152.  
  153.         //--- Attempt to get the value from storage.
  154.         var varValue    = GM_getValue (varName);
  155.         if (!varValue)
  156.             return defaultValue;
  157.  
  158.         //--- We got a value from storage. Now unencode it, if necessary.
  159.         if (typeof varValue == "string") {
  160.             //--- Is it a JSON value?
  161.             var regxp       = new RegExp ('^' + JSON_MarkerStr + '(.+)$');
  162.             var m           = varValue.match (regxp);
  163.             if (m  &&  m.length > 1) {
  164.                 varValue    = JSON.parse ( m[1] );
  165.                 return varValue;
  166.             }
  167.  
  168.             //--- Is it a function?
  169.             var regxp       = new RegExp ('^' + FunctionMarker + '((?:.|\n|\r)+)$');
  170.             var m           = varValue.match (regxp);
  171.             if (m  &&  m.length > 1) {
  172.                 varValue    = eval ('(' + m[1] + ')');
  173.                 return varValue;
  174.             }
  175.         }
  176.  
  177.         return varValue;
  178.     }//-- End of get()
  179.  
  180.  
  181.     /*--- runTestCases ()
  182.         Tests storage and retrieval every every knid of value.
  183.         Note: makes extensive use of the console.
  184.  
  185.         Parameters:
  186.             bUseConsole
  187.                 Boolean: If this is true, uses the console environment to store
  188.                 the data.  Useful for dev test.
  189.         Returns:
  190.             true, if pass.  false, otherwise.
  191.     */
  192.     this.runTestCases = function (bUseConsole) {
  193.  
  194.         if (bUseConsole) {
  195.             //--- Set up the environment to use local JS, and not the GM environment.
  196.             this.testStorage    = {};
  197.             var context         = this;
  198.             this.oldSetFunc     = (typeof GM_setValue == "function") ? GM_setValue : null;
  199.             this.oldGetFunc     = (typeof GM_getValue == "function") ? GM_getValue : null;
  200.  
  201.             GM_setValue    = function (varName, varValue) {
  202.                 console.log ('Storing: ', varName, ' as: ', varValue);
  203.                 context.testStorage[varName] = varValue;
  204.             }
  205.  
  206.             GM_getValue    = function (varName, defaultValue) {
  207.                 var varValue    = context.testStorage[varName];
  208.                 if (!varValue)
  209.                     varValue    = defaultValue;
  210.  
  211.                 console.log ('Retrieving: ', varName, '. Got: ', varValue);
  212.  
  213.                 return varValue;
  214.             }
  215.         }
  216.  
  217.         var dataBefore  =   [null, true, 1, 1.1, -1.0, 2.0E9,  2.77E9,  2.0E-9, 0xA9, 'string',
  218.                             [1,2,3], {a:1, B:2}, function () {a=7; console.log ("Neat! Ain't it?"); }
  219.                         ];
  220.  
  221.         for (var J = 0;  J <= dataBefore.length;  J++)
  222.         {
  223.             var X       = dataBefore[J];
  224.             console.log (J, ': ', typeof X, X);
  225.  
  226.             this.set ('Test item ' + J, X);
  227.             console.log ('\n');
  228.         }
  229.  
  230.         console.log ('\n***********************\n***********************\n\n');
  231.  
  232.         var dataAfter   = [];
  233.  
  234.         for (var J = 0;  J < dataBefore.length;  J++)
  235.         {
  236.             var X       = this.get ('Test item ' + J);
  237.             dataAfter.push (X);
  238.             console.log ('\n');
  239.         }
  240.  
  241.         console.log (dataBefore);
  242.         console.log (dataAfter);
  243.  
  244.         dataAfter[12]();
  245.  
  246.         //--- Now test for pass/fail.  The objects won't be identical but contenets are.
  247.         var bPass;
  248.         if (dataBefore.toString()  ==  dataAfter.toString() ) {
  249.             var pfStr   = 'PASS!';
  250.             bPass       = true;
  251.         } else {
  252.             var pfStr   = 'FAIL!';
  253.             bPass       = false;
  254.         }
  255.         console.log ( "\n***************************        \
  256.                        \n***************************        \
  257.                        \n***************************        \
  258.                        \n*****     " + pfStr + "       *****        \
  259.                        \n***************************        \
  260.                        \n***************************        \
  261.                        \n***************************\n");
  262.  
  263.         if (bUseConsole) {
  264.             //--- Restore the GM functions.
  265.             GM_setValue    = this.oldSetFunc;
  266.             GM_getValue    = this.oldGetFunc;
  267.         }
  268.         else {
  269.             //--- Clean up the FF storage!
  270.  
  271.             for (var J = 0;  J < dataBefore.length;  J++)
  272.             {
  273.                 GM_deleteValue ('Test item ' + J);
  274.             }
  275.         }
  276.  
  277.         return bPass;
  278.  
  279.     }//-- End of runTestCases()
  280. };
  281.  
  282.  
  283. //GM_SuperValue.runTestCases  (true);
  284.  
  285. //--- EOF