refactor(samples/dev): extract calculator styles and script files

This commit is contained in:
2026-04-25 00:51:48 +02:00
parent 202edb47f4
commit 11d3c1da1f
4 changed files with 642 additions and 644 deletions
+204
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@@ -0,0 +1,204 @@
:root {
--body: #d8d8d8;
--panel: #202020;
--panel-2: #2b2b2b;
--screen: #d8e7b8;
--screen-text: #1b2a12;
--screen-dim: #5b6f45;
--key: #3a3a3a;
--key-text: #f2f2f2;
--accent: #8cff6d;
--border: #111;
}
* { box-sizing: border-box; }
body {
margin: 0;
font-family: Arial, sans-serif;
background: linear-gradient(180deg, #efefef, var(--body));
color: #111;
}
.wrap {
max-width: 980px;
margin: 0 auto;
padding: 24px;
}
.calc {
background: linear-gradient(180deg, #2f2f2f, #1f1f1f);
border: 1px solid #111;
border-radius: 20px;
padding: 18px;
box-shadow: 0 18px 48px rgba(0, 0, 0, 0.25);
}
.brand {
color: #fafafa;
display: flex;
justify-content: space-between;
align-items: baseline;
margin-bottom: 12px;
gap: 12px;
}
.brand h1 {
margin: 0;
font-size: 18px;
letter-spacing: 0.06em;
}
.brand small {
color: #c9c9c9;
}
.screen {
background: linear-gradient(180deg, #dbe8b8, var(--screen));
color: var(--screen-text);
border: 2px inset #8aa36b;
border-radius: 10px;
padding: 14px;
min-height: 190px;
font-family: "Courier New", monospace;
display: grid;
grid-template-rows: auto auto 1fr;
gap: 10px;
}
.screen-top {
display: flex;
justify-content: space-between;
gap: 12px;
font-size: 12px;
color: var(--screen-dim);
}
.stack {
border-top: 1px solid rgba(27, 42, 18, 0.35);
padding-top: 10px;
line-height: 1.5;
font-size: 18px;
white-space: pre-wrap;
}
.stack-line {
display: grid;
grid-template-columns: 26px 1fr;
gap: 8px;
padding: 1px 4px;
border-radius: 4px;
}
.stack-line.selected {
background: rgba(27, 42, 18, 0.14);
outline: 1px dashed rgba(27, 42, 18, 0.45);
}
.stack-line.moving {
background: rgba(140, 255, 109, 0.18);
outline: 1px solid rgba(27, 42, 18, 0.55);
}
.stack-line .label {
text-align: right;
color: var(--screen-dim);
}
.stack-line.selected .label,
.stack-line.moving .label {
color: var(--screen-text);
font-weight: bold;
}
.hidden-input {
position: absolute;
left: -9999px;
width: 1px;
height: 1px;
opacity: 0;
pointer-events: none;
}
.input-row {
display: grid;
grid-template-columns: 1fr 150px;
gap: 12px;
margin-top: 14px;
}
input, select, button {
border-radius: 10px;
border: 1px solid #000;
font: inherit;
}
input, select {
padding: 12px 14px;
background: #f7f7f7;
color: #111;
}
.panel {
margin-top: 14px;
background: rgba(255, 255, 255, 0.04);
border: 1px solid rgba(255, 255, 255, 0.08);
border-radius: 14px;
padding: 14px;
}
.title {
color: #fff;
margin: 0 0 10px;
font-size: 14px;
text-transform: uppercase;
letter-spacing: 0.08em;
}
.buttons {
display: grid;
gap: 8px;
grid-template-columns: repeat(auto-fit, minmax(92px, 1fr));
}
button {
padding: 12px 10px;
background: linear-gradient(180deg, #4a4a4a, var(--key));
color: var(--key-text);
cursor: pointer;
box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
}
button:hover { filter: brightness(1.08); }
button:active { transform: translateY(1px); }
.status {
margin-top: 12px;
display: flex;
flex-wrap: wrap;
gap: 10px;
color: #ececec;
font-size: 13px;
}
.pill {
border: 1px solid rgba(255, 255, 255, 0.15);
border-radius: 999px;
padding: 5px 10px;
background: rgba(255, 255, 255, 0.05);
}
.error {
margin-top: 10px;
min-height: 20px;
color: #ff8a8a;
font-family: "Courier New", monospace;
font-size: 13px;
}
.hint {
color: #ddd;
margin-top: 10px;
font-size: 13px;
line-height: 1.5;
}
+2 -644
View File
@@ -4,212 +4,7 @@
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>HP48-style RPN Calculator</title>
<style>
:root {
--body: #d8d8d8;
--panel: #202020;
--panel-2: #2b2b2b;
--screen: #d8e7b8;
--screen-text: #1b2a12;
--screen-dim: #5b6f45;
--key: #3a3a3a;
--key-text: #f2f2f2;
--accent: #8cff6d;
--border: #111;
}
* { box-sizing: border-box; }
body {
margin: 0;
font-family: Arial, sans-serif;
background: linear-gradient(180deg, #efefef, var(--body));
color: #111;
}
.wrap {
max-width: 980px;
margin: 0 auto;
padding: 24px;
}
.calc {
background: linear-gradient(180deg, #2f2f2f, #1f1f1f);
border: 1px solid #111;
border-radius: 20px;
padding: 18px;
box-shadow: 0 18px 48px rgba(0, 0, 0, 0.25);
}
.brand {
color: #fafafa;
display: flex;
justify-content: space-between;
align-items: baseline;
margin-bottom: 12px;
gap: 12px;
}
.brand h1 {
margin: 0;
font-size: 18px;
letter-spacing: 0.06em;
}
.brand small {
color: #c9c9c9;
}
.screen {
background: linear-gradient(180deg, #dbe8b8, var(--screen));
color: var(--screen-text);
border: 2px inset #8aa36b;
border-radius: 10px;
padding: 14px;
min-height: 190px;
font-family: "Courier New", monospace;
display: grid;
grid-template-rows: auto auto 1fr;
gap: 10px;
}
.screen-top {
display: flex;
justify-content: space-between;
gap: 12px;
font-size: 12px;
color: var(--screen-dim);
}
.stack {
border-top: 1px solid rgba(27, 42, 18, 0.35);
padding-top: 10px;
line-height: 1.5;
font-size: 18px;
white-space: pre-wrap;
}
.stack-line {
display: grid;
grid-template-columns: 26px 1fr;
gap: 8px;
padding: 1px 4px;
border-radius: 4px;
}
.stack-line.selected {
background: rgba(27, 42, 18, 0.14);
outline: 1px dashed rgba(27, 42, 18, 0.45);
}
.stack-line.moving {
background: rgba(140, 255, 109, 0.18);
outline: 1px solid rgba(27, 42, 18, 0.55);
}
.stack-line .label {
text-align: right;
color: var(--screen-dim);
}
.stack-line.selected .label,
.stack-line.moving .label {
color: var(--screen-text);
font-weight: bold;
}
.hidden-input {
position: absolute;
left: -9999px;
width: 1px;
height: 1px;
opacity: 0;
pointer-events: none;
}
.input-row {
display: grid;
grid-template-columns: 1fr 150px;
gap: 12px;
margin-top: 14px;
}
input, select, button {
border-radius: 10px;
border: 1px solid #000;
font: inherit;
}
input, select {
padding: 12px 14px;
background: #f7f7f7;
color: #111;
}
.panel {
margin-top: 14px;
background: rgba(255, 255, 255, 0.04);
border: 1px solid rgba(255, 255, 255, 0.08);
border-radius: 14px;
padding: 14px;
}
.title {
color: #fff;
margin: 0 0 10px;
font-size: 14px;
text-transform: uppercase;
letter-spacing: 0.08em;
}
.buttons {
display: grid;
gap: 8px;
grid-template-columns: repeat(auto-fit, minmax(92px, 1fr));
}
button {
padding: 12px 10px;
background: linear-gradient(180deg, #4a4a4a, var(--key));
color: var(--key-text);
cursor: pointer;
box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
}
button:hover { filter: brightness(1.08); }
button:active { transform: translateY(1px); }
.status {
margin-top: 12px;
display: flex;
flex-wrap: wrap;
gap: 10px;
color: #ececec;
font-size: 13px;
}
.pill {
border: 1px solid rgba(255, 255, 255, 0.15);
border-radius: 999px;
padding: 5px 10px;
background: rgba(255, 255, 255, 0.05);
}
.error {
margin-top: 10px;
min-height: 20px;
color: #ff8a8a;
font-family: "Courier New", monospace;
font-size: 13px;
}
.hint {
color: #ddd;
margin-top: 10px;
font-size: 13px;
line-height: 1.5;
}
</style>
<link rel="stylesheet" href="./index.css">
</head>
<body>
<div class="wrap">
@@ -270,443 +65,6 @@
</div>
<script src="../../src/rpn-calculator.js"></script>
<script>
const calc = new RpnCalculator({ angleMode: 'deg' });
const input = document.getElementById('input');
const screen = document.getElementById('screen');
const stackEl = document.getElementById('stack');
const displayEl = document.getElementById('display');
const errorEl = document.getElementById('error');
const inputValueLabel = document.getElementById('inputValueLabel');
const editingLabel = document.getElementById('editingLabel');
const modeLabel = document.getElementById('modeLabel');
const angleMode = document.getElementById('angleMode');
const groups = {
stack: ['enter', 'dup', 'drop', 'swap', 'clear'],
arithmetic: ['add', 'sub', 'mul', 'div', 'mod', 'pow', 'sqr', 'neg', 'sqrt', 'recip', 'log', 'ln'],
trig: ['sin', 'cos', 'tan', 'asin', 'acos', 'atan'],
const: ['pi', 'e'],
};
let stackCursor = null;
let isMovingStackItem = false;
let stackSnapshotBeforeMove = null;
function labelFor(command) {
return ({ add: '+', sub: '', mul: '×', div: '÷', pow: 'y^x', recip: '1/x', sqr: 'x²' }[command] || command);
}
function addButtons(container, commands) {
container.innerHTML = '';
commands.forEach((commandName) => {
const button = document.createElement('button');
button.textContent = labelFor(commandName);
button.addEventListener('click', () => execute(commandName));
container.appendChild(button);
});
}
function getStackValue(index) {
return calc.isValidIndex(index) ? calc.stack[index] : undefined;
}
function getLineValue(line) {
if (calc.isEditing) {
if (line === 0) {
return calc.inputValue;
}
return getStackValue(line - 1);
}
return getStackValue(line);
}
function hasStackSelection() {
return stackCursor !== null && calc.isValidIndex(stackCursor);
}
function clearStackSelection() {
stackCursor = null;
isMovingStackItem = false;
stackSnapshotBeforeMove = null;
}
function ensureValidSelection() {
if (hasStackSelection()) {
return;
}
stackCursor = calc.isValidIndex(0) ? 0 : null;
}
function beginMoveMode() {
if (!hasStackSelection()) {
return;
}
isMovingStackItem = true;
stackSnapshotBeforeMove = calc.stack.slice();
}
function commitMoveMode() {
isMovingStackItem = false;
stackSnapshotBeforeMove = null;
}
function cancelMoveMode() {
if (!isMovingStackItem || !stackSnapshotBeforeMove) {
return;
}
const snapshot = stackSnapshotBeforeMove.slice();
calc.clear();
for (let index = snapshot.length - 1; index >= 0; index -= 1) {
calc.push(snapshot[index]);
}
isMovingStackItem = false;
stackSnapshotBeforeMove = null;
stackCursor = calc.isValidIndex(stackCursor) ? stackCursor : (calc.isValidIndex(0) ? 0 : null);
syncInputFromState();
}
function reactivateEditOnX() {
clearStackSelection();
if (calc.isValidIndex(0)) {
const value = getStackValue(0);
calc.remove(0);
calc.inputValue = calc.formatNumber(value);
calc.isEditing = true;
} else {
calc.inputValue = '';
calc.isEditing = true;
}
syncInputFromState();
}
function moveStackSelection(direction) {
if (!hasStackSelection()) {
if (direction === 'up') {
ensureValidSelection();
} else {
reactivateEditOnX();
}
return;
}
const nextIndex = direction === 'up' ? stackCursor + 1 : stackCursor - 1;
if (calc.isValidIndex(nextIndex)) {
stackCursor = nextIndex;
return;
}
if (direction === 'down' && stackCursor === 0) {
reactivateEditOnX();
}
}
function moveStackItem(direction) {
if (!hasStackSelection()) {
return;
}
const targetIndex = direction === 'up' ? stackCursor + 1 : stackCursor - 1;
if (!calc.isValidIndex(targetIndex)) {
return;
}
calc.swap(stackCursor, targetIndex);
stackCursor = targetIndex;
}
function render() {
const names = ['T', 'Z', 'Y', 'X'];
const lines = [];
for (let line = 3; line >= 0; line -= 1) {
const value = getLineValue(line);
const isSelected = stackCursor === line;
const classes = ['stack-line'];
if (isSelected) {
classes.push(isMovingStackItem ? 'moving' : 'selected');
}
lines.push(`<div class="${classes.join(' ')}"><div class="label">${names[3 - line]}</div><div>${value !== undefined && value !== '' ? calc.formatNumber(value) : ''}</div></div>`);
}
stackEl.innerHTML = lines.join('');
if (calc.isEditing) {
displayEl.textContent = `ENTERING: ${calc.inputValue}`;
} else if (isMovingStackItem && hasStackSelection()) {
displayEl.textContent = `MOVING: ${['X', 'Y', 'Z', 'T'][stackCursor] || '?'}`;
} else if (hasStackSelection()) {
displayEl.textContent = `SELECTED: ${['X', 'Y', 'Z', 'T'][stackCursor] || '?'}`;
} else {
displayEl.textContent = 'READY';
}
inputValueLabel.textContent = calc.inputValue || '∅';
editingLabel.textContent = String(calc.isEditing);
modeLabel.textContent = calc.angleMode;
angleMode.value = calc.angleMode;
errorEl.textContent = '';
}
function pushEditingValueIfNeeded() {
if (!calc.isEditing) return;
if (calc.inputValue !== '') {
const value = calc.parseInputValue(calc.inputValue);
calc.push(value);
}
calc.inputValue = '';
calc.isEditing = false;
syncInputFromState();
}
function execute(name) {
try {
if (name === 'enter') {
if (calc.isEditing) {
pushEditingValueIfNeeded();
} else if (calc.isValidIndex(0)) {
calc.push(getStackValue(0));
}
} else if (name === 'swap') {
pushEditingValueIfNeeded();
clearStackSelection();
if (calc.isValidIndex(1)) calc.swap(0, 1);
} else if (name === 'drop') {
pushEditingValueIfNeeded();
if (hasStackSelection()) {
calc.remove(stackCursor);
stackCursor = calc.isValidIndex(stackCursor) ? stackCursor : (calc.isValidIndex(stackCursor - 1) ? stackCursor - 1 : null);
} else if (calc.isValidIndex(0)) {
calc.remove(0);
}
commitMoveMode();
} else if (name === 'clear') {
calc.clear();
clearStackSelection();
} else {
pushEditingValueIfNeeded();
clearStackSelection();
calc.command(name);
}
syncInputFromState();
render();
} catch (error) {
errorEl.textContent = error.message;
}
}
function isInputChar(key) {
return /^[0-9a-fA-F.]$/.test(key);
}
function shouldIgnoreKeyboardEvent(event) {
const target = event.target;
if (!target) return false;
const tagName = target.tagName;
return (
tagName === 'INPUT' ||
tagName === 'TEXTAREA' ||
tagName === 'SELECT' ||
target.isContentEditable
);
}
function getKeyboardAction(event) {
const numpadMap = {
Numpad0: { type: 'input', value: '0' },
Numpad1: { type: 'input', value: '1' },
Numpad2: { type: 'input', value: '2' },
Numpad3: { type: 'input', value: '3' },
Numpad4: { type: 'input', value: '4' },
Numpad5: { type: 'input', value: '5' },
Numpad6: { type: 'input', value: '6' },
Numpad7: { type: 'input', value: '7' },
Numpad8: { type: 'input', value: '8' },
Numpad9: { type: 'input', value: '9' },
NumpadDecimal: { type: 'input', value: '.' },
NumpadAdd: { type: 'command', value: 'add' },
NumpadSubtract: { type: 'command', value: 'sub' },
NumpadMultiply: { type: 'command', value: 'mul' },
NumpadDivide: { type: 'command', value: 'div' },
NumpadEnter: { type: 'command', value: 'enter' },
};
if (numpadMap[event.code]) {
return numpadMap[event.code];
}
if (isInputChar(event.key)) {
return { type: 'input', value: event.key };
}
const keyMap = {
Enter: { type: 'enterKey' },
Backspace: { type: 'stackOrEdit', value: 'drop' },
Delete: { type: 'command', value: 'clear' },
Escape: { type: 'escapeKey' },
ArrowUp: { type: 'stackArrow', value: 'up' },
ArrowDown: { type: 'stackArrow', value: 'down' },
ArrowRight: { type: 'command', value: 'swap' },
'+': { type: 'command', value: 'add' },
'-': { type: 'command', value: 'sub' },
'*': { type: 'command', value: 'mul' },
'/': { type: 'command', value: 'div' },
'%': { type: 'command', value: 'mod' },
'^': { type: 'command', value: 'pow' },
q: { type: 'command', value: 'sqr' },
n: { type: 'command', value: 'neg' },
r: { type: 'command', value: 'sqrt' },
i: { type: 'command', value: 'recip' },
g: { type: 'command', value: 'log' },
l: { type: 'command', value: 'ln' },
s: { type: 'command', value: 'sin' },
c: { type: 'command', value: 'cos' },
S: { type: 'command', value: 'asin' },
C: { type: 'command', value: 'acos' },
x: { type: 'stackSelect', value: 0 },
y: { type: 'stackSelect', value: 1 },
z: { type: 'stackSelect', value: 2 },
t: { type: 'stackSelect', value: 3 },
X: { type: 'stackSelect', value: 0 },
Y: { type: 'stackSelect', value: 1 },
Z: { type: 'stackSelect', value: 2 },
T: { type: 'stackSelect', value: 3 },
};
return keyMap[event.key] || null;
}
function focusScreen() {
screen.focus();
}
function syncInputFromState() {
input.value = calc.inputValue;
}
function editXWithKey(key) {
if (!calc.isEditing) {
pushEditingValueIfNeeded();
calc.isEditing = true;
calc.inputValue = '';
}
if (key === 'Backspace') {
calc.inputValue = calc.inputValue.slice(0, -1);
} else {
calc.inputValue += key;
}
if (calc.inputValue === '') {
calc.isEditing = false;
}
syncInputFromState();
}
function handleKeydown(event) {
if (shouldIgnoreKeyboardEvent(event)) {
return;
}
const action = getKeyboardAction(event);
if (!action) {
return;
}
try {
if (action.type === 'escapeKey') {
if (calc.isEditing) {
event.preventDefault();
calc.inputValue = '';
calc.isEditing = false;
syncInputFromState();
render();
return;
}
if (isMovingStackItem) {
event.preventDefault();
cancelMoveMode();
render();
}
return;
}
event.preventDefault();
if (action.type === 'input') {
clearStackSelection();
editXWithKey(action.value);
render();
return;
}
if (action.type === 'stackSelect') {
if (calc.isEditing || isMovingStackItem) {
return;
}
stackCursor = calc.isValidIndex(action.value) ? action.value : null;
render();
return;
}
if (action.type === 'stackArrow') {
if (isMovingStackItem) {
moveStackItem(action.value);
} else {
moveStackSelection(action.value);
}
render();
return;
}
if (action.type === 'stackOrEdit') {
if (calc.isEditing) {
editXWithKey('Backspace');
render();
} else {
execute(action.value);
}
return;
}
if (action.type === 'enterKey') {
if (hasStackSelection()) {
if (isMovingStackItem) {
commitMoveMode();
} else {
beginMoveMode();
}
render();
return;
}
execute('enter');
return;
}
if (action.type === 'command') {
execute(action.value);
}
} catch (error) {
errorEl.textContent = error.message;
}
}
window.addEventListener('keydown', handleKeydown);
screen.addEventListener('click', focusScreen);
window.addEventListener('load', focusScreen);
angleMode.addEventListener('change', (event) => {
calc.angleMode = event.target.value;
render();
});
addButtons(document.getElementById('stackButtons'), groups.stack);
addButtons(document.getElementById('arithButtons'), groups.arithmetic);
addButtons(document.getElementById('trigButtons'), groups.trig);
addButtons(document.getElementById('constButtons'), groups.const);
render();
focusScreen();
</script>
<script src="./index.js"></script>
</body>
</html>
+436
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@@ -0,0 +1,436 @@
const calc = new RpnCalculator({ angleMode: 'deg' });
const input = document.getElementById('input');
const screen = document.getElementById('screen');
const stackEl = document.getElementById('stack');
const displayEl = document.getElementById('display');
const errorEl = document.getElementById('error');
const inputValueLabel = document.getElementById('inputValueLabel');
const editingLabel = document.getElementById('editingLabel');
const modeLabel = document.getElementById('modeLabel');
const angleMode = document.getElementById('angleMode');
const groups = {
stack: ['enter', 'dup', 'drop', 'swap', 'clear'],
arithmetic: ['add', 'sub', 'mul', 'div', 'mod', 'pow', 'sqr', 'neg', 'sqrt', 'recip', 'log', 'ln'],
trig: ['sin', 'cos', 'tan', 'asin', 'acos', 'atan'],
const: ['pi', 'e'],
};
let stackCursor = null;
let isMovingStackItem = false;
let stackSnapshotBeforeMove = null;
function labelFor(command) {
return ({ add: '+', sub: '', mul: '×', div: '÷', pow: 'y^x', recip: '1/x', sqr: 'x²' }[command] || command);
}
function addButtons(container, commands) {
container.innerHTML = '';
commands.forEach((commandName) => {
const button = document.createElement('button');
button.textContent = labelFor(commandName);
button.addEventListener('click', () => execute(commandName));
container.appendChild(button);
});
}
function getStackValue(index) {
return calc.isValidIndex(index) ? calc.stack[index] : undefined;
}
function getLineValue(line) {
if (calc.isEditing) {
if (line === 0) {
return calc.inputValue;
}
return getStackValue(line - 1);
}
return getStackValue(line);
}
function hasStackSelection() {
return stackCursor !== null && calc.isValidIndex(stackCursor);
}
function clearStackSelection() {
stackCursor = null;
isMovingStackItem = false;
stackSnapshotBeforeMove = null;
}
function ensureValidSelection() {
if (hasStackSelection()) {
return;
}
stackCursor = calc.isValidIndex(0) ? 0 : null;
}
function beginMoveMode() {
if (!hasStackSelection()) {
return;
}
isMovingStackItem = true;
stackSnapshotBeforeMove = calc.stack.slice();
}
function commitMoveMode() {
isMovingStackItem = false;
stackSnapshotBeforeMove = null;
}
function cancelMoveMode() {
if (!isMovingStackItem || !stackSnapshotBeforeMove) {
return;
}
const snapshot = stackSnapshotBeforeMove.slice();
calc.clear();
for (let index = snapshot.length - 1; index >= 0; index -= 1) {
calc.push(snapshot[index]);
}
isMovingStackItem = false;
stackSnapshotBeforeMove = null;
stackCursor = calc.isValidIndex(stackCursor) ? stackCursor : (calc.isValidIndex(0) ? 0 : null);
syncInputFromState();
}
function reactivateEditOnX() {
clearStackSelection();
if (calc.isValidIndex(0)) {
const value = getStackValue(0);
calc.remove(0);
calc.inputValue = calc.formatNumber(value);
calc.isEditing = true;
} else {
calc.inputValue = '';
calc.isEditing = true;
}
syncInputFromState();
}
function moveStackSelection(direction) {
if (!hasStackSelection()) {
if (direction === 'up') {
ensureValidSelection();
} else {
reactivateEditOnX();
}
return;
}
const nextIndex = direction === 'up' ? stackCursor + 1 : stackCursor - 1;
if (calc.isValidIndex(nextIndex)) {
stackCursor = nextIndex;
return;
}
if (direction === 'down' && stackCursor === 0) {
reactivateEditOnX();
}
}
function moveStackItem(direction) {
if (!hasStackSelection()) {
return;
}
const targetIndex = direction === 'up' ? stackCursor + 1 : stackCursor - 1;
if (!calc.isValidIndex(targetIndex)) {
return;
}
calc.swap(stackCursor, targetIndex);
stackCursor = targetIndex;
}
function render() {
const names = ['T', 'Z', 'Y', 'X'];
const lines = [];
for (let line = 3; line >= 0; line -= 1) {
const value = getLineValue(line);
const isSelected = stackCursor === line;
const classes = ['stack-line'];
if (isSelected) {
classes.push(isMovingStackItem ? 'moving' : 'selected');
}
lines.push(`<div class="${classes.join(' ')}"><div class="label">${names[3 - line]}</div><div>${value !== undefined && value !== '' ? calc.formatNumber(value) : ''}</div></div>`);
}
stackEl.innerHTML = lines.join('');
if (calc.isEditing) {
displayEl.textContent = `ENTERING: ${calc.inputValue}`;
} else if (isMovingStackItem && hasStackSelection()) {
displayEl.textContent = `MOVING: ${['X', 'Y', 'Z', 'T'][stackCursor] || '?'}`;
} else if (hasStackSelection()) {
displayEl.textContent = `SELECTED: ${['X', 'Y', 'Z', 'T'][stackCursor] || '?'}`;
} else {
displayEl.textContent = 'READY';
}
inputValueLabel.textContent = calc.inputValue || '∅';
editingLabel.textContent = String(calc.isEditing);
modeLabel.textContent = calc.angleMode;
angleMode.value = calc.angleMode;
errorEl.textContent = '';
}
function pushEditingValueIfNeeded() {
if (!calc.isEditing) return;
if (calc.inputValue !== '') {
const value = calc.parseInputValue(calc.inputValue);
calc.push(value);
}
calc.inputValue = '';
calc.isEditing = false;
syncInputFromState();
}
function execute(name) {
try {
if (name === 'enter') {
if (calc.isEditing) {
pushEditingValueIfNeeded();
} else if (calc.isValidIndex(0)) {
calc.push(getStackValue(0));
}
} else if (name === 'swap') {
pushEditingValueIfNeeded();
clearStackSelection();
if (calc.isValidIndex(1)) calc.swap(0, 1);
} else if (name === 'drop') {
pushEditingValueIfNeeded();
if (hasStackSelection()) {
calc.remove(stackCursor);
stackCursor = calc.isValidIndex(stackCursor) ? stackCursor : (calc.isValidIndex(stackCursor - 1) ? stackCursor - 1 : null);
} else if (calc.isValidIndex(0)) {
calc.remove(0);
}
commitMoveMode();
} else if (name === 'clear') {
calc.clear();
clearStackSelection();
} else {
pushEditingValueIfNeeded();
clearStackSelection();
calc.command(name);
}
syncInputFromState();
render();
} catch (error) {
errorEl.textContent = error.message;
}
}
function isInputChar(key) {
return /^[0-9a-fA-F.]$/.test(key);
}
function shouldIgnoreKeyboardEvent(event) {
const target = event.target;
if (!target) return false;
const tagName = target.tagName;
return (
tagName === 'INPUT' ||
tagName === 'TEXTAREA' ||
tagName === 'SELECT' ||
target.isContentEditable
);
}
function getKeyboardAction(event) {
const numpadMap = {
Numpad0: { type: 'input', value: '0' },
Numpad1: { type: 'input', value: '1' },
Numpad2: { type: 'input', value: '2' },
Numpad3: { type: 'input', value: '3' },
Numpad4: { type: 'input', value: '4' },
Numpad5: { type: 'input', value: '5' },
Numpad6: { type: 'input', value: '6' },
Numpad7: { type: 'input', value: '7' },
Numpad8: { type: 'input', value: '8' },
Numpad9: { type: 'input', value: '9' },
NumpadDecimal: { type: 'input', value: '.' },
NumpadAdd: { type: 'command', value: 'add' },
NumpadSubtract: { type: 'command', value: 'sub' },
NumpadMultiply: { type: 'command', value: 'mul' },
NumpadDivide: { type: 'command', value: 'div' },
NumpadEnter: { type: 'command', value: 'enter' },
};
if (numpadMap[event.code]) {
return numpadMap[event.code];
}
if (isInputChar(event.key)) {
return { type: 'input', value: event.key };
}
const keyMap = {
Enter: { type: 'enterKey' },
Backspace: { type: 'stackOrEdit', value: 'drop' },
Delete: { type: 'command', value: 'clear' },
Escape: { type: 'escapeKey' },
ArrowUp: { type: 'stackArrow', value: 'up' },
ArrowDown: { type: 'stackArrow', value: 'down' },
ArrowRight: { type: 'command', value: 'swap' },
'+': { type: 'command', value: 'add' },
'-': { type: 'command', value: 'sub' },
'*': { type: 'command', value: 'mul' },
'/': { type: 'command', value: 'div' },
'%': { type: 'command', value: 'mod' },
'^': { type: 'command', value: 'pow' },
q: { type: 'command', value: 'sqr' },
n: { type: 'command', value: 'neg' },
r: { type: 'command', value: 'sqrt' },
i: { type: 'command', value: 'recip' },
g: { type: 'command', value: 'log' },
l: { type: 'command', value: 'ln' },
s: { type: 'command', value: 'sin' },
c: { type: 'command', value: 'cos' },
S: { type: 'command', value: 'asin' },
C: { type: 'command', value: 'acos' },
x: { type: 'stackSelect', value: 0 },
y: { type: 'stackSelect', value: 1 },
z: { type: 'stackSelect', value: 2 },
t: { type: 'stackSelect', value: 3 },
X: { type: 'stackSelect', value: 0 },
Y: { type: 'stackSelect', value: 1 },
Z: { type: 'stackSelect', value: 2 },
T: { type: 'stackSelect', value: 3 },
};
return keyMap[event.key] || null;
}
function focusScreen() {
screen.focus();
}
function syncInputFromState() {
input.value = calc.inputValue;
}
function editXWithKey(key) {
if (!calc.isEditing) {
pushEditingValueIfNeeded();
calc.isEditing = true;
calc.inputValue = '';
}
if (key === 'Backspace') {
calc.inputValue = calc.inputValue.slice(0, -1);
} else {
calc.inputValue += key;
}
if (calc.inputValue === '') {
calc.isEditing = false;
}
syncInputFromState();
}
function handleKeydown(event) {
if (shouldIgnoreKeyboardEvent(event)) {
return;
}
const action = getKeyboardAction(event);
if (!action) {
return;
}
try {
if (action.type === 'escapeKey') {
if (calc.isEditing) {
event.preventDefault();
calc.inputValue = '';
calc.isEditing = false;
syncInputFromState();
render();
return;
}
if (isMovingStackItem) {
event.preventDefault();
cancelMoveMode();
render();
}
return;
}
event.preventDefault();
if (action.type === 'input') {
clearStackSelection();
editXWithKey(action.value);
render();
return;
}
if (action.type === 'stackSelect') {
if (calc.isEditing || isMovingStackItem) {
return;
}
stackCursor = calc.isValidIndex(action.value) ? action.value : null;
render();
return;
}
if (action.type === 'stackArrow') {
if (isMovingStackItem) {
moveStackItem(action.value);
} else {
moveStackSelection(action.value);
}
render();
return;
}
if (action.type === 'stackOrEdit') {
if (calc.isEditing) {
editXWithKey('Backspace');
render();
} else {
execute(action.value);
}
return;
}
if (action.type === 'enterKey') {
if (hasStackSelection()) {
if (isMovingStackItem) {
commitMoveMode();
} else {
beginMoveMode();
}
render();
return;
}
execute('enter');
return;
}
if (action.type === 'command') {
execute(action.value);
}
} catch (error) {
errorEl.textContent = error.message;
}
}
window.addEventListener('keydown', handleKeydown);
screen.addEventListener('click', focusScreen);
window.addEventListener('load', focusScreen);
angleMode.addEventListener('change', (event) => {
calc.angleMode = event.target.value;
render();
});
addButtons(document.getElementById('stackButtons'), groups.stack);
addButtons(document.getElementById('arithButtons'), groups.arithmetic);
addButtons(document.getElementById('trigButtons'), groups.trig);
addButtons(document.getElementById('constButtons'), groups.const);
render();
focusScreen();