Better code organization, user-added points
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parent
588ff13304
commit
46a5c4e14c
237
script.js
237
script.js
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@ -18,6 +18,19 @@ function divide(a, b) {
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return a / b;
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}
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const operationInitial = {
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a: "0",
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operator: "",
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b: "",
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addToA: true,
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displayA: true,
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readyForEquasion: false,
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outputOfEquasion: false,
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}
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let operation = {};
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Object.assign(operation, operationInitial);
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function operate(equals) {
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switch(equals.operator) {
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case "+":
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@ -31,96 +44,147 @@ function operate(equals) {
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}
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}
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function execute(operation) {
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if (operation.readyForEquasion) {
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const result = operate(operation);
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operation.addToA = !operation.addToA;
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operation.readyForEquasion = false;
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operation.operator = "";
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if (operation.addToA) {
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operation.a = `${result}`;
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operation.b = "";
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operation.outputOfEquasion = true;
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valueGui.textContent = `${operation.a}`;
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// check if number is valid
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function checkNumber(number) {
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return number == " " ? false : !isNaN(+number);
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}
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// handlers for actions
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function addPoint() {
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if (operation.addToA) {
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if (!operation.a.includes(".")) {
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operation.a += ".";
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}
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} else {
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if (!operation.b.includes(".")) {
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operation.b += ".";
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}
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console.table(operation);
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console.log(`Result: ${result}`);
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}
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}
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const operationInitial = {
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a: "0",
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operator: "",
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b: "",
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addToA: true,
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readyForEquasion: false,
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outputOfEquasion: false,
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function handleNumbers(value) {
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if (operation.outputOfEquasion) {
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operation.a = value;
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operation.outputOfEquasion = false;
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operation.addToA = true;
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} else {
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if (operation.addToA) {
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if (operation.a == "0") {
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operation.a = "";
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}
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operation.a += value;
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operation.displayA = true;
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} else {
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if (operation.b == "0") {
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operation.b = "";
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}
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operation.displayA = false;
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operation.b += value;
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operation.readyForEquasion = true;
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}
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}
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}
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let operation = {};
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Object.assign(operation, operationInitial);
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function handleBackspace() {
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if (!operation.outputOfEquasion) {
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if (operation.addToA) {
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operation.a = operation.a.substring(0, operation.a.length - 1);
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if (operation.a.length < 1) {
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operation.a = "0";
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}
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} else {
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operation.b = operation.b.substring(0, operation.b.length - 1);
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if (operation.b.length < 1) {
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operation.b = "0";
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}
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}
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} else {
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clear();
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}
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}
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let readyForEquasion = "";
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function handleOperators(value) {
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if (operation.operator == "") {
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operation.addToA = !operation.addToA;
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operation.operator = value;
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}
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if (operation.addToA) {
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operation.operator = value;
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}
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operation.outputOfEquasion = false;
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}
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function clearDisplay() {
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signGui.textContent = "";
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valueGui.textContent = `0`;
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function execute(operation) {
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if (operation.readyForEquasion) {
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const result = operate(operation);
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operation.displayA = true;
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operation.addToA = true;
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operation.readyForEquasion = false;
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operation.operator = "";
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operation.a = `${result}`;
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operation.b = "";
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operation.outputOfEquasion = true;
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}
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}
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function clear() {
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clearDisplay();
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Object.assign(operation, operationInitial);
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signGui.textContent = "";
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valueGui.textContent = operation.a;
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}
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function populateDisplay(operation) {
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signGui.textContent = `${operation.operator}`;
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if (operation.addToA) {
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if (operation.displayA) {
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valueGui.textContent = `${operation.a}`;
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} else {
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valueGui.textContent = `${operation.b}`;
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}
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}
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function click(value) {
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if (!isNaN(+value)) {
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if (operation.outputOfEquasion) {
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operation.a = value;
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operation.outputOfEquasion = false;
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populateDisplay(operation);
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operation.addToA = true;
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} else {
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if (operation.addToA) {
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if (operation.a == "0") {
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operation.a = "";
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}
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operation.a += value;
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populateDisplay(operation);
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} else {
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if (operation.b == "0") {
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operation.b = "";
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}
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operation.b += value;
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operation.readyForEquasion = true;
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populateDisplay(operation);
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}
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}
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} else if (value == "=") {
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execute(operation);
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populateDisplay(operation);
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} else {
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if (operation.operator == "") {
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operation.addToA = !operation.addToA;
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operation.operator = value;
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populateDisplay(operation);
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}
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if (operation.addToA) {
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operation.operator = value;
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}
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operation.outputOfEquasion = false;
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// handling presses on keyboard and buttons
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function handleAction(e) {
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if (!e.keyCode) {
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// when the press comes from button, makes it
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// compatible with code for keyboard with no rewrites
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e = {key: e}
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}
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console.table(operation);
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let action = true;
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let passLetter = e.key.toLowerCase();
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if (passLetter == " "
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|| passLetter == ".") {
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addPoint();
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} else if (!isNaN(+passLetter)) {
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handleNumbers(passLetter);
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} else if (passLetter == "backspace"
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|| passLetter == "x") {
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handleBackspace();
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} else if (passLetter == "+"
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|| passLetter == "-"
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|| passLetter == "*"
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|| passLetter == "/") {
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handleOperators(passLetter);
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} else if (passLetter == "enter"
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|| passLetter == "=") {
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execute(operation);
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} else if (passLetter == "escape"
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|| passLetter == "c") {
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clear();
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} else {
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action = false;
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}
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if (action) {
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populateDisplay(operation);
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};
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}
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document.addEventListener("keydown", handleAction);
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// create buttons
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function generateGui() {
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const allButtons = [
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@ -168,7 +232,7 @@ function generateGui() {
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button.setAttribute("rowspan", buttonProperties.height);
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button.textContent = buttonProperties.display;
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button.addEventListener("click", (event) => {
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click(event.target.getAttribute("value"));
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handleAction(event.target.getAttribute("value"));
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});
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tableRow.append(button);
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});
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@ -177,43 +241,4 @@ function generateGui() {
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buttonsDiv.append(table);
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}
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generateGui();
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document.addEventListener("keydown", numbers);
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function numbers(e) {
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e = e || window.event;
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let passLetter = e.key.toLowerCase();
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if (!isNaN(+passLetter)) {
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click(passLetter);
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} else if (passLetter == "escape") {
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clear();
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} else if (passLetter == "backspace") {
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if (!operation.outputOfEquasion) {
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if (operation.addToA) {
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operation.a = operation.a.substring(0, operation.a.length - 1);
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if (operation.a.length < 1) {
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operation.a = "0";
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}
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} else {
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operation.b = operation.b.substring(0, operation.b.length - 1);
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if (operation.b.length < 1) {
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operation.b = "0";
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}
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}
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populateDisplay(operation);
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} else {
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clear();
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}
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} else if (passLetter == "+"
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|| passLetter == "-"
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|| passLetter == "*"
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|| passLetter == "/"
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|| passLetter == "=") {
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click(passLetter);
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} else if (passLetter == "enter") {
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click("=");
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} else {
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console.log(passLetter);
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}
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}
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generateGui();
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