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I've created mixin to dynamically add 'use strict' literal to the start of functions in classes.
First, we need to create cache of keys which contains in second parameter of Ext.define:
  1. (function () {
  2. var old = Ext4.define,
  3. del = [
  4. 'extend', 'mixins', 'statics', 'strictMethods',
  5. 'constructor', 'init', 'notStrictMethods', 'initComponent'
  6. ],
  7. res;
  8. // save keys in cache and delete potentially unsafe keys
  9. window.StrictCache = {};
  10. Ext4.define = function (name, data) {
  11. res = Ext4.Object.getKeys(data);
  12. if (data.statics) {
  13. if (Ext4.isArray(data.statics.notStrictMethods)) {
  14. del = Ext4.Array.merge(del, data.statics.notStrictMethods);
  15. }
  16. res = Ext4.Array.merge(res, Ext4.Object.getKeys(data.statics));
  17. }
  18. res = Ext4.Array.unique(res);
  19. if (Ext4.isArray(data.notStrictMethods)) {
  20. del = Ext4.Array.merge(del, data.notStrictMethods);
  21. }
  22. Ext4.each(del, function (toDelete) {
  23. Ext4.Array.remove(res, toDelete);
  24. });
  25. StrictCache[name] = res;
  26. return old.apply(this, arguments);
  27. };
  28. })();

Next, we must to write mixin:
  1. /**
  2.  * @class Lib.StrictMixin
  3.  * Mixin class for 'use strict'
  4.  * @author guyfawkes
  5.  * @docauthor guyfawkes
  6.  */
  7. Ext4.define('Lib.StrictMixin', {
  8. onClassMixedIn : function (mixedClass) {
  9. var fn;
  10. // mixedClass can be both class prototype or constructor (in this case we need to get function from its prototype)
  11. // please note we don't break loop when strictMethods were found: it must be both in 'statics' and non-static of ExtJS 4's class
  12. Ext4.each([mixedClass, mixedClass.prototype], function (obj, index) {
  13. fn = function(method) {
  14. if (Ext4.isFunction(obj[method])) {
  15. console && console.info(
  16. Ext4.String.format(
  17. '{0} found in {1} of {2}',
  18. method, (index ? 'constructor prototype' : 'prototype'), obj.$className
  19. )
  20. );
  21. obj[method] = new Function("'use strict';nreturn " + obj[method].toString())();
  22. }
  23. };
  24. // if we need to loop over all methods, get keys from cache (or we'll get functions from parent classes and got an error
  25. if (Ext4.isString(obj.strictMethods) && (obj.strictMethods === 'ALL') && Ext4.isString(obj.$className)) {
  26. Ext4.each(StrictCache[obj.$className], fn);
  27. }
  28. else {
  29. // if strictMethods is an array, loop over it
  30. if (Ext4.isArray(obj.strictMethods)) {
  31. Ext4.each(obj.strictMethods, fn);
  32. }
  33. }
  34. });
  35. }
  36. });

@темы: ExtJS 4, JavaScript, use strict