Enforcing type safety at export

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/js/history/common.mjs

@@ -36,7 +36,7 @@ class HistoryCommonAPI extends Module {
     redo() { this.history.redo() }
     clear() { this.history.clear() }
     addToHistory(action) { this.history.addToHistory(action) }
-    unserialize(data) { this.history.unserialize(data) }
+    unserialize(...data) { this.history.unserialize(...data) }
     serialize() { return this.history.serialize() }
 }
 
@@ -124,7 +124,7 @@ export class Action {
     }
     
     /**
-     * Returns a string with the HTML-formated description of the action.
+     * Returns a string with the HTML-formatted description of the action.
      * 
      * @returns {string}
      */

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/js/io.mjs

@@ -98,15 +98,15 @@ class IOAPI extends Module {
             Modules.History.clear()
             // Importing settings
             this.settings.saveFilename = filename
-            this.settings.xzoom = data["xzoom"]
+            this.settings.xzoom = parseFloat(data["xzoom"]) || 100
-            this.settings.yzoom = data["yzoom"]
+            this.settings.yzoom = parseFloat(data["yzoom"]) || 10
-            this.settings.xmin = data["xmin"]
+            this.settings.xmin = parseFloat(data["xmin"]) || 5/10
-            this.settings.ymax = data["ymax"]
+            this.settings.ymax = parseFloat(data["ymax"]) || 24
-            this.settings.xaxisstep = data["xaxisstep"]
+            this.settings.xaxisstep = data["xaxisstep"] || "4"
-            this.settings.yaxisstep = data["yaxisstep"]
+            this.settings.yaxisstep = data["yaxisstep"] || "4"
-            this.settings.xlabel = data["xaxislabel"]
+            this.settings.xlabel = data["xaxislabel"] || ""
-            this.settings.ylabel = data["yaxislabel"]
+            this.settings.ylabel = data["yaxislabel"] || ""
-            this.settings.logscalex = data["logscalex"]
+            this.settings.logscalex = data["logscalex"] === true
             if("showxgrad" in data)
                 this.settings.showxgrad = data["showxgrad"]
             if("showygrad" in data)
@@ -115,8 +115,8 @@ class IOAPI extends Module {
                 this.settings.linewidth = data["linewidth"]
             if("textsize" in data)
                 this.settings.textsize = data["textsize"]
-            this.rootElement.height = data["height"]
+            this.rootElement.height = parseFloat(data["height"]) || 500
-            this.rootElement.width = data["width"]
+            this.rootElement.width = parseFloat(data["width"]) || 1000
 
             // Importing objects
             Modules.Objects.currentObjects = {}
@@ -129,7 +129,8 @@ class IOAPI extends Module {
                 if(Object.keys(Modules.Objects.types).indexOf(objType) > -1) {
                     Modules.Objects.currentObjects[objType] = []
                     for(let objData of data['objects'][objType]) {
-                        let obj = new Modules.Objects.types[objType](...objData)
+                        /** @type {DrawableObject} */
+                        let obj = Modules.Objects.types[objType].import(...objData)
                         Modules.Objects.currentObjects[objType].push(obj)
                         Modules.Objects.currentObjectsByName[obj.name] = obj
                     }

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/js/lib/qmlpolyfills.mjs

@@ -26,6 +26,8 @@ qsTranslate = qsTranslate || function(category, string) { throw new Error('qsTra
 qsTr = qsTr || function(string) { throw new Error('qsTr not implemented.'); }
 /** @type {function(string, string): string} */
 QT_TRANSLATE_NOOP = QT_TRANSLATE_NOOP || function(string, string) { throw new Error('QT_TRANSLATE_NOOP not implemented.'); }
+/** @type {function(string): string} */
+QT_TR_NOOP = QT_TR_NOOP || function(string) { throw new Error('QT_TR_NOOP not implemented.'); }
 /** @type {function(string|boolean|int): string} */
 String.prototype.arg = String.prototype.arg || function(parameter) { throw new Error('arg not implemented.'); }
 

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/js/objs/common.mjs

@@ -20,6 +20,7 @@ import { getRandomColor, textsub } from "../utils.mjs"
 import Objects from "../objects.mjs"
 import Latex from "../math/latex.mjs"
 import {Module} from "../modules.mjs"
+import {ensureTypeSafety, serializesByPropertyType} from "../parameters.mjs"
 
 // This file contains the default data to be imported from all other objects
 
@@ -34,7 +35,7 @@ class ObjectsCommonAPI extends Module {
     }
 
     /**
-     * Creates a new name for an object, based on the \c allowedLetters.
+     * Creates a new name for an object, based on the  allowedLetters.
      * If variables with each of the allowedLetters is created, a subscript
      * number is added to the name.
      * @param {string} allowedLetters
@@ -56,7 +57,7 @@ class ObjectsCommonAPI extends Module {
     }
 
     /**
-     * Registers the object \c obj in the object list.
+     * Registers the object  obj in the object list.
      * @param {DrawableObject} obj - Object to be registered.
      */
     registerObject(obj) {
@@ -132,13 +133,27 @@ export class DrawableObject {
      */
     static executable() {return false}
 
+    /**
+     * Imports the object from its serialized form.
+     * @return {DrawableObject}
+     */
+    static import(name, visible, color, labelContent, ...args) {
+        let importedArgs = [name.toString(), visible === true, color.toString(), labelContent]
+        console.log('Importing', this.type(), name, args)
+        for(let [name, propType] of Object.entries(this.properties()))
+            if(!name.startsWith('comment')) {
+                importedArgs.push(ensureTypeSafety(propType, args[importedArgs.length-4]))
+            }
+        return new this(...importedArgs)
+    }
+    
     /**
      * Base constructor for the object.
      * @param {string} name - Name of the object
      * @param {boolean} visible - true if the object is visible, false otherwise.
      * @param {color|string} color - Color of the object (can be string or QColor)
      * @param {Enum} labelContent - One of 'null', 'name' or 'name + value' describing the content of the label.
-     * @constructor()
+     * @constructor
      */
     constructor(name, visible = true, color = null, labelContent = 'name + value') {
         if(color == null) color = getRandomColor()
@@ -152,13 +167,16 @@ export class DrawableObject {
     }
 
     /**
-     * Serilizes the object in an array that can be JSON serialized.
+     * Serializes the object in an array that can be JSON serialized.
      * These parameters will be re-entered in the constructor when restored.
      * @return {array}
      */
     export() {
-        // Should return what will be inputed as arguments when a file is loaded (serializable form)
+        let exportList = [this.name, this.visible, this.color.toString(), this.labelContent]
-        return [this.name, this.visible, this.color.toString(), this.labelContent]
+        for(let [name, propType] of Object.entries(this.constructor.properties()))
+            if(!name.startsWith('comment'))
+                exportList.push(serializesByPropertyType(propType, this[name]))
+        return exportList
     }
     
     /**
@@ -182,7 +200,7 @@ export class DrawableObject {
     }
     
     /**
-     * Readable string content of the label depending on the value of the \c latexContent.
+     * Readable string content of the label depending on the value of the  latexContent.
      * @return {string}
      */
     getLabel() {
@@ -198,7 +216,7 @@ export class DrawableObject {
     }
     
     /**
-     * Latex markup string content of the label depending on the value of the \c latexContent.
+     * Latex markup string content of the label depending on the value of the  latexContent.
      * Every non latin character should be passed as latex symbols and formulas 
      * should be in latex form.
      * See ../latex.mjs for helper methods.
@@ -275,16 +293,15 @@ export class DrawableObject {
     }
     
     /**
-     * Abstract method. Draw the object onto the \c canvas with the.
+     * Abstract method. Draw the object onto the  canvas with the.
      * @param {CanvasAPI} canvas
-     * @param {CanvasRenderingContext2D} ctx
      */
     draw(canvas) {}
     
     /**
-     * Applicates a \c drawFunction with two position arguments depending on 
+     * Applicates a  drawFunction with two position arguments depending on 
-     * both the \c posX and \c posY of where the label should be displayed, 
+     * both the  posX and  posY of where the label should be displayed, 
-     * and the \c labelPosition which declares the label should be displayed
+     * and the  labelPosition which declares the label should be displayed
      * relatively to that position.
      * 
      * @param {string|Enum} labelPosition - Position of the label relative to the marked position
@@ -333,17 +350,16 @@ export class DrawableObject {
     }
     
     /**
-     * Automatically draw text (by default the label of the object on the \c canvas with
+     * Automatically draw text (by default the label of the object on the  canvas
-     * the 2D context \c ctx depending on user settings.
+     * depending on user settings.
-     * This method takes into account both the \c posX and \c posY of where the label
+     * This method takes into account both the  posX and  posY of where the label
-     * should be displayed, including the \c labelPosition relative to it.
+     * should be displayed, including the  labelPosition relative to it.
-     * The text is get both through the \c getLatexFunction and \c getTextFunction
+     * The text is get both through the  getLatexFunction and  getTextFunction
      * depending on whether to use latex.
-     * Then, it's displayed using the \c drawFunctionLatex (x,y,imageData) and
+     * Then, it's displayed using the  drawFunctionLatex (x,y,imageData) and
-     * \c drawFunctionText (x,y,text) depending on whether to use latex.
+     *  drawFunctionText (x,y,text) depending on whether to use latex.
      * 
      * @param {CanvasAPI} canvas
-     * @param {CanvasRenderingContext2D} ctx
      * @param {string|Enum} labelPosition - Position of the label relative to the marked position
      * @param {number} posX - Component of the marked position on the x-axis 
      * @param {number} posY - Component of the marked position on the y-axis 

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/js/objs/function.mjs

@@ -35,8 +35,8 @@ export default class Function extends ExecutableObject {
                                                               'comment',
                                                               'Ex: R+* (ℝ⁺*), N (ℕ), Z-* (ℤ⁻*), ]0;1[, {3;4;5}'
                                                           ),
-        [QT_TRANSLATE_NOOP('prop','labelPosition')]:      P.Enum.Position,
         [QT_TRANSLATE_NOOP('prop','displayMode')]:        P.Enum.FunctionDisplayType,
+        [QT_TRANSLATE_NOOP('prop','labelPosition')]:      P.Enum.Position,
         [QT_TRANSLATE_NOOP('prop','labelX')]:             'number',
                                   'comment2':             QT_TRANSLATE_NOOP(
                                                               'comment',
@@ -82,12 +82,6 @@ export default class Function extends ExecutableObject {
         }
     }
 
-    export() {
-        return [this.name, this.visible, this.color.toString(), this.labelContent, 
-        this.expression.toEditableString(), this.definitionDomain.toString(), this.destinationDomain.toString(), 
-        this.displayMode, this.labelPosition, this.labelX, this.drawPoints, this.drawDashedLines]
-    }
-    
     execute(x = 1) {
         if(this.definitionDomain.includes(x))
             return this.expression.execute(x)

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/js/objs/gainbode.mjs

@@ -81,11 +81,6 @@ export default class GainBode extends ExecutableObject {
         \\end{array}`
     }
     
-    export() {
-        return [this.name, this.visible, this.color.toString(), this.labelContent, 
-        this.om_0.name, this.pass.toString(), this.gain.toEditableString(), this.labelPosition, this.labelX, this.omGraduation]
-    }
-    
     execute(x=1) {
         if(typeof x == 'string') x = executeExpression(x)
         if((this.pass === 'high' && x < this.om_0.x) || (this.pass === 'low' && x > this.om_0.x)) {

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/js/objs/phasebode.mjs

@@ -64,11 +64,6 @@ export default class PhaseBode extends ExecutableObject {
         this.labelX = labelX
     }
     
-    export() {
-        return [this.name, this.visible, this.color.toString(), this.labelContent, 
-        this.om_0.name, this.phase.toEditableString(), this.unit, this.labelPosition, this.labelX]
-    }
-    
     getReadableString() {
         return `${this.name}: ${this.phase.toString(true)}${this.unit} at ${this.om_0.name} = ${this.om_0.x}`
     }

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/js/objs/point.mjs

@@ -54,10 +54,6 @@ export default class Point extends DrawableObject  {
         return `${Latex.variable(this.name)} = \\left(${this.x.latexMarkup}, ${this.y.latexMarkup}\\right)`
     }
     
-    export() {
-        return [this.name, this.visible, this.color.toString(), this.labelContent, this.x.toEditableString(), this.y.toEditableString(), this.labelPosition, this.pointStyle]
-    }
-    
     draw(canvas) {
         let [canvasX, canvasY] = [canvas.x2px(this.x.execute()), canvas.y2px(this.y.execute())]
         let pointSize = 8+(canvas.linewidth*2)

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/js/objs/repartition.mjs

@@ -26,33 +26,34 @@ export default class RepartitionFunction extends ExecutableObject {
     static displayType(){return qsTr('Repartition')}
     static displayTypeMultiple(){return qsTr('Repartition functions')}
     static properties() {return {
-        [QT_TRANSLATE_NOOP('prop','labelPosition')]: P.Enum.Position,
-        [QT_TRANSLATE_NOOP('prop','labelX')]:        'number',
                                   'comment1':        QT_TRANSLATE_NOOP(
                                                          'comment',
                                                          'Note: Specify the probability for each value.'
                                                      ),
-        [QT_TRANSLATE_NOOP('prop','probabilities')]: new P.Dictionary('string', 'float', /^-?[\d.,]+$/, /^-?[\d.,]+$/, 'P({name_} = ', ') = '),
+        [QT_TRANSLATE_NOOP('prop','probabilities')]: new P.Dictionary('string', 'double', /^-?[\d.,]+$/, /^-?[\d.,]+$/, 'P({name_} = ', ') = '),
+        [QT_TRANSLATE_NOOP('prop','labelPosition')]: P.Enum.Position,
+        [QT_TRANSLATE_NOOP('prop','labelX')]:        'number',
     }}
+    static import(name, visible, color, labelContent, ...args) {
+        console.log(args, args.length)
+        if(args.length === 5) {
+            // Two legacy values no longer included.
+            args.shift()
+            args.shift()
+        }
+        return super.import(name, visible, color, labelContent, ...args)
+    }
     
     constructor(name = null, visible = true, color = null, labelContent = 'name + value', 
-                beginIncluded = true, drawLineEnds = true, probabilities = {'0': '0'}, labelPosition = 'above', labelX = 1) {
+                probabilities = {'0': '0'}, labelPosition = 'above', labelX = 1) {
         if(name == null) name = Common.getNewName('XYZUVW', "F_")
         super(name, visible, color, labelContent)
-        this.beginIncluded = beginIncluded
-        this.drawLineEnds = drawLineEnds
         this.probabilities = probabilities
         this.labelPosition = labelPosition
         this.labelX = labelX
         this.update()
     }
     
-    export() {
-        return [this.name, this.visible, this.color.toString(), this.labelContent,
-        this.beginIncluded, this.drawLineEnds, this.probabilities, this.labelPosition, this.labelX]
-    }
-    
-    
     getReadableString() {
         let keys = Object.keys(this.probabilities).sort((a,b) => a-b);
         let varname = this.name.substring(this.name.indexOf("_")+1)

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/js/objs/sequence.mjs

@@ -56,15 +56,8 @@ export default class Sequence extends ExecutableObject {
         this.update()
     }
 
-    export() {
-        return [this.name, this.visible, this.color.toString(), this.labelContent,
-            this.drawPoints, this.drawDashedLines, this.defaultExpression, this.baseValues,
-            this.labelPosition, this.labelX]
-    }
-
     update() {
         console.log('Updating sequence', this.sequence)
-        console.trace()
         super.update()
         if(
             this.sequence == null || this.baseValues !== this.sequence.baseValues ||

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/js/objs/sommegainsbode.mjs

@@ -44,10 +44,6 @@ export default class SommeGainsBode extends ExecutableObject {
         this.recalculateCache()
     }
     
-    export() {
-        return [this.name, this.visible, this.color.toString(), this.labelContent, this.labelPosition, this.labelX]
-    }
-    
     getReadableString() {
         return `${this.name} = ${Objects.getObjectsName('Gain Bode').join(' + ')}`
     }

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/js/objs/sommephasesbode.mjs

@@ -42,10 +42,6 @@ export default class SommePhasesBode extends ExecutableObject {
         this.recalculateCache()
     }
     
-    export() {
-        return [this.name, this.visible, this.color.toString(), this.labelContent, this.labelPosition, this.labelX]
-    }
-    
     getReadableString() {
         return `${this.name} = ${Objects.getObjectsName('Phase Bode').join(' + ')}`
     }

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/js/objs/text.mjs

@@ -32,7 +32,7 @@ export default class Text extends DrawableObject  {
         [QT_TRANSLATE_NOOP('prop','y')]:             new P.Expression(),
         [QT_TRANSLATE_NOOP('prop','labelPosition')]: P.Enum.Positioning,
         [QT_TRANSLATE_NOOP('prop','text')]:          'string',
-                            'comment1':              QT_TRANSLATE_NOOP(
+                           'comment1':               QT_TRANSLATE_NOOP(
                                                          'comment',
                                                          'If you have latex enabled, you can use use latex markup in between $$ to create equations.'
                                                      ),
@@ -78,10 +78,6 @@ export default class Text extends DrawableObject  {
         return `${Latex.variable(this.name)} = "\\textsf{${this.latexMarkupText()}}"`
     }
     
-    export() {
-        return [this.name, this.visible, this.color.toString(), this.labelContent, this.x.toEditableString(), this.y.toEditableString(), this.labelPosition, this.text, this.disableLatex]
-    }
-    
     getLabel() {
         return this.text
     }

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/js/objs/xcursor.mjs

@@ -29,8 +29,8 @@ export default class XCursor extends DrawableObject {
     static displayType(){return qsTr('X Cursor')}
     static displayTypeMultiple(){return qsTr('X Cursors')}
     static properties() {return {
-        [QT_TRANSLATE_NOOP('prop','x')]:                   'Expression',
+        [QT_TRANSLATE_NOOP('prop','x')]:                   new P.Expression(),
-        [QT_TRANSLATE_NOOP('prop','targetElement')]:       new P.ObjectType('ExecutableObject'),
+        [QT_TRANSLATE_NOOP('prop','targetElement')]:       new P.ObjectType('ExecutableObject', true),
         [QT_TRANSLATE_NOOP('prop','labelPosition')]:       P.Enum.Position,
         [QT_TRANSLATE_NOOP('prop','approximate')]:         'boolean',
         [QT_TRANSLATE_NOOP('prop','rounding')]:            'number',
@@ -60,12 +60,6 @@ export default class XCursor extends DrawableObject {
         this.targetValuePosition = targetValuePosition
     }
     
-    export() {
-        return [this.name, this.visible, this.color.toString(), this.labelContent, 
-        this.x.toEditableString(), this.targetElement == null ? null : this.targetElement.name, this.labelPosition, 
-        this.approximate, this.rounding, this.displayStyle, this.targetValuePosition]
-    }
-    
     getReadableString() {
         if(this.targetElement == null) return `${this.name} = ${this.x.toString()}`
         return `${this.name} = ${this.x.toString()}\n${this.getTargetValueLabel()}`

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/js/parameters.mjs

@@ -15,58 +15,192 @@
  *  You should have received a copy of the GNU General Public License
  *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
+import {parseDomain, Expression as Expr, Domain} from "./mathlib.mjs"
 
-export class Expression {
+const NONE = class Empty {}
+
+let stringValuesValidators = {
+    'int': [parseInt, (x) => !isNaN(x)],
+    'double': [parseFloat, (x) => !isNaN(x)],
+    'string': [(x) => x, () => true]
+}
+let stringValidatorTypes = Object.keys(stringValuesValidators)
+
+
+class PropertyType {
+    /**
+     * Validates if a value corresponds to the current property type, and if so, returns it.
+     * @param value
+     * @returns {null|object}
+     */
+    parse(value) {
+        throw new TypeError(`validate function of ${typeof this} has not been implemented.`)
+    }
+
+    /**
+     * Exports the value of this property type.
+     * @param value
+     * @returns {string|number|bool|object}
+     */
+    export(value) {
+        throw new TypeError(`export function of ${typeof this} has not been implemented.`)
+    }
+}
+
+
+export class Expression extends PropertyType {
     constructor(...variables) {
+        super()
         this.type = 'Expression'
         this.variables = variables
     }
     
     toString() {
-        return this.variables.length == 0 ? 'Number' : `Expression(${this.variables.join(', ')})`
+        return this.variables.length === 0 ? 'Number' : `Expression(${this.variables.join(', ')})`
+    }
+
+    parse(value) {
+        let result = NONE
+        if(typeof value == 'string')
+            try {
+                result = new Expr(value)
+            } catch(e) {
+                // Silently error and return null
+                console.trace()
+                console.log(`Error parsing expression ${value}:`)
+                console.error(e)
+            }
+        return result
+    }
+
+    export(value) {
+        if(value instanceof Expr)
+            return value.toEditableString()
+        else
+            throw new TypeError(`Exportation error: ${value} is not an expression.`)
     }
 }
 
-export class Enum {
+
+export class Enum extends PropertyType {
     constructor(...values) {
+        super()
         this.type = 'Enum'
         this.values = values
+        this.legacyValues = {}
         this.translatedValues = values.map(x => qsTr(x))
     }
     
     toString() {
-        return this.type
+        return `${this.type}(${this.values.join(', ')})`
+    }
+
+    parse(value) {
+        let result = NONE
+        if(this.values.includes(value))
+            result = value
+        else if(this.legacyValues[value])
+            result = this.legacyValues[value]
+        return result
+    }
+
+    export(value) {
+        if(this.values.includes(value))
+            return value
+        else if(this.legacyValues[value])
+            return this.legacyValues[value]
+        else
+            throw new TypeError(`Exportation error: ${value} not one of ${this.values.join(', ')}.`)
     }
 }
 
-export class ObjectType {
+
-    constructor(objType) {
+export class ObjectType extends PropertyType {
+    constructor(objType, allowNull=false) {
+        super()
         this.type = 'ObjectType'
         this.objType = objType
+        this.allowNull = allowNull
     }
     
     toString() {
         return this.objType
     }
+
+    parse(name) {
+        let result = NONE
+        if(typeof name == 'string' && name in Modules.Objects.currentObjectsByName) {
+            let obj = Modules.Objects.currentObjectsByName[name]
+            if (obj.type === this.objType || (this.objType === 'ExecutableObject' && obj.execute)) {
+                result = obj
+            } else {
+                // Silently error and return null
+                console.trace()
+                console.error(new TypeError(`Object ${name} is of not of type ${this.objType}:`))
+            }
+        } else if(this.allowNull && (name == null || name === "null"))
+            result = null
+        return result
+    }
+
+    export(value) {
+        if(value == null && this.allowNull)
+            return null
+        else if(value.type === this.objType || (this.objType === 'ExecutableObject' && value.execute))
+            return value.name
+        else
+            throw new TypeError(`Exportation error: ${value} not a ${this.objType}.`)
+    }
 }
 
-export class List {
+
+export class List extends PropertyType {
     constructor(type, format = /^.+$/, label = '', forbidAdding = false) {
+        super()
         // type can be string, int and double.
         this.type = 'List'
         this.valueType = type
+        if(!stringValidatorTypes.includes(this.valueType))
+            throw new TypeError(`${this.valueType} must be one of ${stringValidatorTypes.join(', ')}.`)
         this.format = format
         this.label = label
         this.forbidAdding = forbidAdding
     }
     
     toString() {
-        return this.objType
+        return `${this.type}(${this.valueType}:${this.format})`
+    }
+
+    parse(value) {
+        let result = NONE
+        if(typeof value == 'object' && value.__proto__ === Array) {
+            let list = []
+            for(let v of value) {
+                if (this.format.test(v)) {
+                    v = stringValuesValidators[this.valueType][0](v)
+                    if(stringValuesValidators[this.valueType][1](v))
+                        list.append(v)
+                }
+            }
+            if(list.length === value.length)
+                result = value
+        }
+        return result
+    }
+
+    export(value) {
+        if(typeof value == 'object' && value.__proto__ === Array)
+            return value
+        else
+            throw new TypeError(`Exportation error: ${value} not a list.`)
+
     }
 }
 
-export class Dictionary {
+
+export class Dictionary extends PropertyType {
     constructor(type, keyType = 'string', format = /^.+$/, keyFormat = /^.+$/, preKeyLabel = '', postKeyLabel = ': ', forbidAdding = false) {
+        super()
         // type & keyType can be string, int and double.
         this.type = 'Dict'
         this.valueType = type
@@ -79,7 +213,33 @@ export class Dictionary {
     }
 
     toString() {
-        return 'Dictionary'
+        return `${this.type}(${this.keyType}:${this.keyFormat}: ${this.valueType}:${this.format})`
+    }
+
+    parse(value) {
+        let result = NONE
+        if(typeof value == 'object' && value.__proto__ !== Array) {
+            let dict = []
+            for(let [k, v] of Object.entries(value)) {
+                if (this.format.test(v) && this.keyFormat.test(k)) {
+                    k = stringValuesValidators[this.keyType][0](k)
+                    v = stringValuesValidators[this.valueType][0](v)
+                    if(stringValuesValidators[this.keyType][1](k))
+                        if(stringValuesValidators[this.valueType][1](v))
+                            dict[k] = v
+                }
+            }
+            if(Object.keys(dict).length === Object.keys(value).length)
+                result = value
+        }
+        return result
+    }
+
+    export(value) {
+        if(typeof value == 'object' && value.__proto__ !== Array)
+            return value
+        else
+            throw new TypeError(`Exportation error: ${value} not a dictionary.`)
     }
 }
 
@@ -95,6 +255,14 @@ Enum.Position = new Enum(
     QT_TR_NOOP('below-left'),  
     QT_TR_NOOP('below-right')
 )
+Enum.Position.legacyValues = {
+    'top': 'above',
+    'bottom': 'below',
+    'top-left': 'above-left',
+    'top-right': 'above-right',
+    'bottom-left': 'below-left',
+    'bottom-right': 'below-right',
+}
 
 Enum.Positioning = new Enum(
     QT_TR_NOOP('center'),
@@ -125,4 +293,86 @@ Enum.XCursorValuePosition = new Enum(
     QT_TR_NOOP('Hidden')
 )
 
+/**
+ * Ensures whether a provided value is of the corresponding type.
+ * @param {string|PropertyType} propertyType
+ * @param {string|number|boolean|array|object}value
+ * @returns {Object}
+ */
+export function ensureTypeSafety(propertyType, value) {
+    let result
+    let error = false
+    if(typeof propertyType == 'string')
+        switch(propertyType) {
+            case 'string':
+                result = value
+                error = typeof value !== 'string'
+                break
+            case 'number':
+                result = parseFloat(value)
+                error = isNaN(result)
+                break
+            case 'boolean':
+                result = value
+                error = value !== true && value !== false
+                break
+            case 'Domain':
+                try {
+                    error = typeof value !== 'string'
+                    if(!error)
+                        result = parseDomain(value)
+                } catch(e) {
+                    // Parse domain sometimes returns an empty set when it cannot parse a domain.
+                    // It's okay though, it shouldn't be user parsed value, so returning an empty set
+                    // is okay for a corrupted file, rather than erroring.
+                    console.trace()
+                    console.log(`Error parsing domain ${value}:`)
+                    console.error(e)
+                    error = true
+                }
+                break
+        }
+    else if(propertyType instanceof PropertyType) {
+        result = propertyType.parse(value)
+        error = result === NONE
+    } else
+        throw new TypeError(`Importation error: Unknown property type ${propertyType}.`)
+    if(error) {
+        console.trace()
+        throw new TypeError(`Importation error: Couldn't parse ${JSON.stringify(value)} as ${propertyType}.`)
+    }
+    return result
+}
 
+/**
+ * Serializes a property by its type to export into JSON.
+ * @param {string|PropertyType} propertyType
+ * @param value
+ * @returns {Object}
+ */
+export function serializesByPropertyType(propertyType, value) {
+    let result
+    if(typeof propertyType == 'string')
+        switch(propertyType) {
+            case 'string':
+                result = value.toString()
+                break
+            case 'number':
+                result = parseFloat(value)
+                break
+            case 'boolean':
+                result = value === true
+                break
+            case 'Domain':
+                if(value instanceof Domain)
+                    result = value.toString()
+                else
+                    throw new TypeError(`Exportation error: ${value} is not a domain.`)
+                break
+        }
+    else if(propertyType instanceof PropertyType) {
+        result = propertyType.export(value)
+    } else
+        throw new TypeError(`Exportation error: Unknown property type ${propertyType}.`)
+    return result
+}