New system for integrals the same as for derivatives.

The new derivative now supports executable elements.

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/ObjectLists/ObjectCreationGrid.qml

@@ -42,7 +42,6 @@ Column {
     */
     function openEditorDialog(obj) {
         // Open editor
-        console.log(obj, obj.prototype)
         objectEditor.obj = obj
         objectEditor.objType = obj.type
         objectEditor.objIndex = Objects.currentObjects[obj.type].indexOf(obj)

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/Setting/ExpressionEditor.qml

@@ -433,7 +433,7 @@ Item {
                     itemSelected: parent.itemSelected
                     categoryItems: Parsing.CONSTANTS_LIST
                     autocompleteGenerator: (item) => {return {
-                        'text': item, 'annotation': '',
+                        'text': item, 'annotation': Parsing.CONSTANTS[item],
                         'autocomplete': item + " ", 'cursorFinalOffset': 0
                     }}
                     baseText: parent.visible ? parent.currentToken.value : ""

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/js/expr-eval.js

@@ -27,7 +27,7 @@ var ADDITIONAL_VARCHARS = [
   "ₜ","¹","²","³","⁴","⁵","⁶",
   "⁷","⁸","⁹","⁰","₁","₂","₃",
   "₄","₅","₆","₇","₈","₉","₀",
-  "∞"
+  "∞","π"
 ]
 
 function Instruction(type, value) {
@@ -1117,7 +1117,7 @@ ParserState.prototype.parseExpression = function (instr) {
   if (this.parseUntilEndStatement(instr, exprInstr)) {
     return;
   }
-  this.parseVariableAssignmentExpression(exprInstr);
+  this.parseConditionalExpression(exprInstr);
   if (this.parseUntilEndStatement(instr, exprInstr)) {
     return;
   }
@@ -1157,37 +1157,6 @@ ParserState.prototype.parseArrayList = function (instr) {
   return argCount;
 };
 
-ParserState.prototype.parseVariableAssignmentExpression = function (instr) {
-  this.parseConditionalExpression(instr);
-  while (this.accept(TOP, '=')) {
-    var varName = instr.pop();
-    var varValue = [];
-    var lastInstrIndex = instr.length - 1;
-    if (varName.type === IFUNCALL) {
-      if (!this.tokens.isOperatorEnabled('()=')) {
-        throw new Error(qsTranslate('error', 'Function definition is not permitted.'));
-      }
-      for (var i = 0, len = varName.value + 1; i < len; i++) {
-        var index = lastInstrIndex - i;
-        if (instr[index].type === IVAR) {
-          instr[index] = new Instruction(IVARNAME, instr[index].value);
-        }
-      }
-      this.parseVariableAssignmentExpression(varValue);
-      instr.push(new Instruction(IEXPR, varValue));
-      instr.push(new Instruction(IFUNDEF, varName.value));
-      continue;
-    }
-    if (varName.type !== IVAR && varName.type !== IMEMBER) {
-      throw new Error(qsTranslate('error', 'Expected variable for assignment.'));
-    }
-    this.parseVariableAssignmentExpression(varValue);
-    instr.push(new Instruction(IVARNAME, varName.value));
-    instr.push(new Instruction(IEXPR, varValue));
-    instr.push(binaryInstruction('='));
-  }
-};
-
 ParserState.prototype.parseConditionalExpression = function (instr) {
   this.parseOrExpression(instr);
   while (this.accept(TOP, '?')) {

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/js/math/common.js

@@ -22,8 +22,6 @@
 .import "../utils.js" as Utils
 .import "latex.js" as Latex
 
-const DERIVATION_PRECISION = 0.1
-
 var evalVariables = { // Variables not provided by expr-eval.js, needs to be provided manually
     "pi": Math.PI,
     "PI": Math.PI,
@@ -46,16 +44,56 @@ const parser = new ExprEval.Parser()
 
 parser.consts = Object.assign({}, parser.consts, evalVariables)
 
+/**
+ * Parses arguments for a function, returns the corresponding JS function if it exists.
+ * Throws either usage error otherwise.
+ * @param {array} args - Arguments of the function, either [ ExecutableObject ] or [ string, variable ].
+ * @param {string} usage1 - Usage for executable object.
+ * @param {string} usage2 - Usage for string function.
+ * @return {callable} JS function to call..
+ */
+function parseArgumentsForFunction(args, usage1, usage2) {
+    let f, target, variable
+    if(args.length == 1) {
+        // Parse object
+        f = args[0]
+        if(typeof f != 'object' || !f.execute)
+            throw EvalError(qsTranslate('usage', 'Usage: %1').arg(usage1))
+        let target = f
+        f = (x) => target.execute(x)
+    } else if(args.length == 2) {
+        // Parse variable
+        [f,variable] = args
+        if(typeof f != 'string' || typeof variable != 'number')
+            throw EvalError(qsTranslate('usage', 'Usage: %1').arg(usage2))
+        f = parser.parse(f).toJSFunction(variable, currentVars)
+    } else
+        throw EvalError(qsTranslate('usage', 'Usage: %1 or\n%2').arg(usage1).arg(usage2)))
+    return f
+}
+
 // Function definition
-parser.functions.integral = function(a, b, f, variable) {
+parser.functions.integral = function(a, b, ...args) {
+    let usage1 = qsTranslate('usage', 'integral(<from: number>, <to: number>, <f: ExecutableObject>)')
+    let usage2 = qsTranslate('usage', 'integral(<from: number>, <to: number>, <f: string>, <variable: string>)')
+    let f = parseArgumentsForFunction(args, usage1, usage2)
+    if(a == null || b == null)
+        throw EvalError(qsTranslate('usage', 'Usage: %1 or\n%2').arg(usage1).arg(usage2)))
+
     // https://en.wikipedia.org/wiki/Simpson%27s_rule
     // Simpler, faster than tokenizing the expression
-    f = parser.parse(f).toJSFunction(variable, currentVars)
     return (b-a)/6*(f(a)+4*f((a+b)/2)+f(b))
 }
 
-parser.functions.derivative = function(f, variable, x) {
-    f = parser.parse(f).toJSFunction(variable, currentVars)
-    return (f(x+DERIVATION_PRECISION/2)-f(x-DERIVATION_PRECISION/2))/DERIVATION_PRECISION
+parser.functions.derivative = function(...args) {
+    let usage1 = qsTranslate('usage', 'derivative(<f: ExecutableObject>, <x: variable>)')
+    let usage2 = qsTranslate('usage', 'derivative(<f: string>, <variable: string>, <x: variable>)')
+    let x = args.pop()
+    let f = parseArgumentsForFunction(args, usage1, usage2)
+    if(x == null)
+        throw EvalError(qsTranslate('usage', 'Usage: %1 or\n%2').arg(usage1).arg(usage2)))
+        
+    let derivative_precision = x/10
+    return (f(x+derivative_precision/2)-f(x-derivative_precision/2))/derivative_precision
 }
 

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/js/math/latex.js

@@ -73,10 +73,16 @@ function parif(elem, contents) {
 function functionToLatex(f, args) {
     switch(f) {
         case "derivative":
+            if(args.length == 3)
                 return '\\frac{d' + args[0].substr(1, args[0].length-2).replace(new RegExp(args[1].substr(1, args[1].length-2), 'g'), 'x') + '}{dx}';
+            else
+                return '\\frac{d' + args[0] + '}{dx}(x)';
             break;
         case "integral":
+            if(args.length == 4)
                 return '\\int\\limits_{' + args[0] + '}^{' + args[1] + '}' + args[2].substr(1, args[2].length-2) + ' d' + args[3].substr(1, args[3].length-2);
+            else
+                return '\\int\\limits_{' + args[0] + '}^{' + args[1] + '}' + args[2] + '(t) dt';
             break;
         case "sqrt":
             return '\\sqrt\\left(' + args.join(', ') + '\\right)';

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/js/parsing/reference.js

@@ -85,33 +85,90 @@ const FUNCTIONS = {
     'gamma': Polyfill.gamma,
     'Γ': Polyfill.gamma,
     'roundTo': (x, exp) => Number(x).toFixed(exp),
-    'map': Polyfill.arrayMap,
-    'fold': Polyfill.arrayFold,
-    'filter': Polyfill.arrayFilter,
-    'indexOf': Polyfill.indexOf,
-    'join': Polyfill.arrayJoin,
+    // 'map': Polyfill.arrayMap,
+    // 'fold': Polyfill.arrayFold,
+    // 'filter': Polyfill.arrayFilter,
+    // 'indexOf': Polyfill.indexOf,
+    // 'join': Polyfill.arrayJoin,
     // Integral & derivative (only here for autocomplete).
     'integral': () => 0, // TODO: Implement
     'derivative': () => 0,
 }
 const FUNCTIONS_LIST = Object.keys(FUNCTIONS);
-// TODO: Complete
-const DERIVATIVES = {
-    "abs": "abs(<1>)/<1>",
-    "acos": "-derivate(<1>)/sqrt(1-(<1>)^2)",
-    "acosh": "derivate(<1>)/sqrt((<1>)^2-1)",
-    "asin": "derivate(<1>)/sqrt(1-(<1>)^2)",
-    "asinh": "derivate(<1>)/sqrt((<1>)^2+1)",
-    "atan": "derivate(<1>)/(1+(<1>)^2)",
-    "atan2": "",
-}
-const INTEGRALS = {
-    "abs": "integrate(<1>)*sign(<1>)",
-    "acos": "",
-    "acosh": "",
-    "asin": "",
-    "asinh": "",
-    "atan": "",
-    "atan2": "",
+
+class P {
+    // Parameter class.
+    constructor(type, name = '', optional = false, multipleAllowed = false) {
+        this.name = name
+        this.type = type
+        this.optional = optional
+        this.multipleAllowed = multipleAllowed
+    }
+    
+    toString() {
+        base_string = this.type
+        if(this.name != '')
+            base_string = `${this.name}: ${base_string}`
+        if(this.multipleAllowed)
+            base_string += '...'
+        if(!this.optional)
+            base_string = `<${base_string}>`
+        else
+            base_string = `[${base_string}]`
+        return base_string
+    }
+}
+
+let string = new P('string')
+let bool = new P('boolean')
+let number = new P('number')
+let array = new P('array')
+
+const FUNCTIONS_USAGE = {
+    'length': [string],
+    'not': [bool],
+    // Math functions
+    'abs': [number],
+    'acos': [number],
+    'acosh': [number],
+    'asin': [number],
+    'asinh': [number],
+    'atan': [number],
+    'atan2': [number],
+    'atanh': [number],
+    'cbrt': [number],
+    'ceil': [number],
+    //'clz32': [number],
+    'cos': [number],
+    'cosh': [number],
+    'exp': [number],
+    'expm1': [number],
+    'floor': [number],
+    //'fround': [number],
+    'hypot': [number],
+    //'imul': [number],
+    'lg': [number],
+    'ln': [number],
+    'log': [number],
+    'log10': [number],
+    'log1p': [number],
+    'log2': [number],
+    'max': [number, number, new P('number', '', true, null, true)],
+    'min': [number, number, new P('number', '', true, null, true)],
+    'pow': [number, new P('number', 'exponent')],
+    'random': [number, number],
+    'round': [number],
+    'sign': [number],
+    'sin': [number],
+    'sinh': [number],
+    'sqrt': [number],
+    'tan': [number],
+    'tanh': [number],
+    'trunc': [number],
+    // Functions in expr-eval, ported here.
+    'fac': [number],
+    'gamma': [number],
+    'Γ': [number],
+    'roundTo': [number, new P('number')],
 }