This PR solves the issue #254. The changes made were:
Implemented the jsondiffpatch library.
Implemented the undoStack and redoStack stacks, to store the done and undone changes.
Implemented the basicData attribute to store a copy of the editor state.
Updated the initialize method for initializing the basicData attribute.
Updated the clear method to clean the content of the undoStack and redoStack stacks.
Updated the editorDidUpdate method in terms of basicData.
Updated the save method to make use of the diff method from jsondiffpatch library and get the difference (delta) between the current basicData value and the entry changes, in order to add that delta in the undoStack and update the basicData with the entry changes.
Updated the undo method to make usage of the jsonpatchFormatter format from jsondiffpatch library, in order to get clear info about the delta stored in the top of the undoStack, and save it in the redoStack, in addition, make usage of the unpatch method from jsondiffpatch library to build the previous state of basicData, removing the changes specified in lastState(delta). In this point, we are deleting the element from the undoStack and saving it into redoStack.
Updated the redo method to make usage of the patch method from jsondiffpatch library to build the next state of basicData applying the changes contained in lastRedoState(delta). In this point, we are deleting the element from the redoStack.
Replaced in the other methods stack with undoStack.
Description
This PR solves the issue #254. The changes made were:
jsondiffpatchlibrary.undoStackandredoStackstacks, to store the done and undone changes.basicDataattribute to store a copy of the editor state.initializemethod for initializing thebasicDataattribute.clearmethod to clean the content of theundoStackandredoStackstacks.editorDidUpdatemethod in terms ofbasicData.savemethod to make use of thediffmethod fromjsondiffpatchlibrary and get the difference (delta) between the currentbasicDatavalue and the entry changes, in order to add thatdeltain theundoStackand update thebasicDatawith the entry changes.undomethod to make usage of thejsonpatchFormatterformat fromjsondiffpatchlibrary, in order to get clear info about thedeltastored in thetopof theundoStack, and save it in theredoStack, in addition, make usage of theunpatchmethod fromjsondiffpatchlibrary to build the previous state ofbasicData, removing the changes specified inlastState(delta). In this point, we are deleting the element from theundoStackand saving it intoredoStack.redomethod to make usage of thepatchmethod fromjsondiffpatchlibrary to build the next state ofbasicDataapplying the changes contained inlastRedoState(delta). In this point, we are deleting the element from theredoStack.stackwithundoStack.