LogarithmPlotter/qml/js/historylib.js

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/**
* Logarithm Graph Creator - Create graphs with logarithm scales.
* Copyright (C) 2020 Ad5001
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
// This library helps containing actions to be undone or redone (in other words, editing history)
// Each type of event is repertoried as an action that can be listed for everything that's undoable.
.pragma library
.import "objects.js" as Objects
.import "utils.js" as Utils
class Action {
// Type of the action done.
static type(){return 'Unknown'}
// TargetName is the name of the object that's targeted by the event.
constructor(targetName = "", targetType = "Point") {
this.targetName = targetName
this.targetType = targetType
}
undo() {}
redo() {}
getReadableString() {
return 'Unknown action'
}
}
class CreateNewObject extends Action {
// Action used for the creation of an object
static type(){return 'CreateNewObject'}
constructor(targetName = "", targetType = "Point", properties = []) {
super(targetName, targetType)
this.targetProperties = properties
}
undo() {
var targetIndex = Objects.getObjectsName(this.targetType).indexOf(this.targetName)
Objects.currentObjects[this.targetType][targetIndex].delete()
Objects.currentObjects[this.targetType].splice(targetIndex, 1)
}
redo() {
Objects.createNewRegisteredObject(this.targetType, this.targetProperties)
}
getReadableString() {
return `New ${this.targetType} ${this.targetName} created.`
}
}
class DeleteObject extends CreateNewObject {
// Action used at the deletion of an object. Basicly the same thing as creating a new object, except Redo & Undo are reversed.
static type(){return 'DeleteObject'}
undo() {
super.redo()
}
redo() {
super.undo()
}
getReadableString() {
return `${this.targetType} ${this.targetName} deleted.`
}
}
class EditedProperty extends Action {
// Action used everytime an object's property has been changed
static type(){return 'EditedProperty'}
constructor(targetName = "", targetType = "Point", targetProperty = "visible", previousValue = false, newValue = true) {
super(targetName, targetType)
this.targetProperty = targetProperty
this.targetPropertyReadable = Utils.camelCase2readable(this.targetProperty)
this.previousValue = previousValue
this.newValue = newValue
}
undo() {
Objects.getObjectByName(this.targetName, this.targetType)[this.targetProperty] = this.previousValue
}
redo() {
Objects.getObjectByName(this.targetName, this.targetType)[this.targetProperty] = this.newValue
}
getReadableString() {
var prev = this.previousValue == null ? ""+this.previousValue : this.previousValue.toString()
var next = this.newValue == null ? ""+this.newValue : this.newValue.toString()
return `${this.targetPropertyReadable} of ${this.targetType} ${this.targetName} changed from "${prev}" to "${next}".`
}
}
class EditedVisibility extends EditedProperty {
// Action used everytime an object's property has been changed
static type(){return 'EditedVisibility'}
constructor(targetName = "", targetType = "Point", newValue = true) {
super(targetName, targetType, "visible", !newValue, newValue)
}
getReadableString() {
if(this.newValue) {
return `${this.targetType} ${this.targetName} shown.`
} else {
return `${this.targetType} ${this.targetName} hidden.`
}
}
}