614 lines
16 KiB
JavaScript
614 lines
16 KiB
JavaScript
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 keyLayouts = {
|
||
functions: [
|
||
[
|
||
{ type: 'command', value: 'sqrt', label: 'sqrt', className: 'key-function' },
|
||
{ type: 'command', value: 'pow', label: 'y^x', className: 'key-function' },
|
||
{ type: 'command', value: 'sqr', label: 'x²', className: 'key-function' },
|
||
{ type: 'command', value: 'recip', label: '1/x', className: 'key-function' },
|
||
],
|
||
[
|
||
{ type: 'command', value: 'log', label: 'log', className: 'key-function' },
|
||
{ type: 'command', value: 'ln', label: 'ln', className: 'key-function' },
|
||
null,
|
||
{ type: 'command', value: 'mod', label: '%', className: 'key-function' },
|
||
],
|
||
[
|
||
{ type: 'command', value: 'sin', label: 'sin', className: 'key-function' },
|
||
{ type: 'command', value: 'cos', label: 'cos', className: 'key-function' },
|
||
{ type: 'command', value: 'tan', label: 'tan', className: 'key-function' },
|
||
null,
|
||
],
|
||
[
|
||
{ type: 'command', value: 'asin', label: 'asin', className: 'key-function' },
|
||
{ type: 'command', value: 'acos', label: 'acos', className: 'key-function' },
|
||
{ type: 'command', value: 'atan', label: 'atan', className: 'key-function' },
|
||
null,
|
||
],
|
||
],
|
||
numbers: [
|
||
[
|
||
{ type: 'input', value: '7', label: '7', className: 'key-number' },
|
||
{ type: 'input', value: '8', label: '8', className: 'key-number' },
|
||
{ type: 'input', value: '9', label: '9', className: 'key-number' },
|
||
],
|
||
[
|
||
{ type: 'input', value: '4', label: '4', className: 'key-number' },
|
||
{ type: 'input', value: '5', label: '5', className: 'key-number' },
|
||
{ type: 'input', value: '6', label: '6', className: 'key-number' },
|
||
],
|
||
[
|
||
{ type: 'input', value: '1', label: '1', className: 'key-number' },
|
||
{ type: 'input', value: '2', label: '2', className: 'key-number' },
|
||
{ type: 'input', value: '3', label: '3', className: 'key-number' },
|
||
],
|
||
[
|
||
{ type: 'input', value: '0', label: '0', className: 'key-number' },
|
||
{ type: 'input', value: '.', label: '.', className: 'key-number' },
|
||
{ type: 'command', value: 'neg', label: '+/−', className: 'key-number' },
|
||
],
|
||
],
|
||
operators: [
|
||
[
|
||
{ type: 'command', value: 'div', label: '/', className: 'key-operator' },
|
||
null,
|
||
],
|
||
[
|
||
{ type: 'command', value: 'mul', label: '*', className: 'key-operator' },
|
||
null,
|
||
],
|
||
[
|
||
{ type: 'command', value: 'sub', label: '-', className: 'key-operator' },
|
||
{ type: 'command', value: 'enter', label: 'Enter', className: 'key-enter' },
|
||
],
|
||
[
|
||
{ type: 'command', value: 'add', label: '+', className: 'key-operator' },
|
||
null,
|
||
],
|
||
],
|
||
};
|
||
|
||
const topButtons = {
|
||
consts: [
|
||
{ type: 'command', value: 'pi', label: 'π', className: 'key-function' },
|
||
{ type: 'command', value: 'e', label: 'e', className: 'key-function' },
|
||
],
|
||
del: { type: 'command', value: 'clear', label: 'del', className: 'key-danger' },
|
||
backspace: { type: 'action', value: 'backspace', label: 'backspace', className: 'key-operator' },
|
||
escape: { type: 'action', value: 'escape', label: 'esc', className: 'key-danger' },
|
||
};
|
||
|
||
let stackCursor = null;
|
||
let isMovingStackItem = false;
|
||
let stackSnapshotBeforeMove = null;
|
||
let stackViewOffset = 0;
|
||
let editRestoreValue = null;
|
||
|
||
function handleEscapeAction() {
|
||
if (calc.isEditing) {
|
||
if (editRestoreValue !== null) {
|
||
calc.push(editRestoreValue);
|
||
editRestoreValue = null;
|
||
}
|
||
calc.inputValue = '';
|
||
calc.isEditing = false;
|
||
syncInputFromState();
|
||
render();
|
||
return;
|
||
}
|
||
|
||
if (isMovingStackItem) {
|
||
cancelMoveMode();
|
||
clearStackSelection();
|
||
render();
|
||
return;
|
||
}
|
||
|
||
if (hasStackSelection()) {
|
||
clearStackSelection();
|
||
render();
|
||
}
|
||
}
|
||
|
||
function pressKey(key) {
|
||
clearStackSelection();
|
||
editXWithKey(key);
|
||
render();
|
||
}
|
||
|
||
function handleBackspaceAction() {
|
||
if (calc.isEditing) {
|
||
editXWithKey('Backspace');
|
||
render();
|
||
return;
|
||
}
|
||
|
||
execute('drop');
|
||
}
|
||
|
||
function createButton(cell) {
|
||
if (!cell) {
|
||
const spacer = document.createElement('div');
|
||
spacer.className = 'key-spacer';
|
||
spacer.setAttribute('aria-hidden', 'true');
|
||
return spacer;
|
||
}
|
||
|
||
const button = document.createElement('button');
|
||
button.type = 'button';
|
||
button.textContent = cell.label;
|
||
button.className = cell.className;
|
||
button.addEventListener('click', () => {
|
||
focusScreen();
|
||
if (cell.type === 'input') {
|
||
pressKey(cell.value);
|
||
return;
|
||
}
|
||
if (cell.type === 'action') {
|
||
if (cell.value === 'escape') {
|
||
handleEscapeAction();
|
||
return;
|
||
}
|
||
if (cell.value === 'backspace') {
|
||
handleBackspaceAction();
|
||
return;
|
||
}
|
||
}
|
||
execute(cell.value);
|
||
});
|
||
return button;
|
||
}
|
||
|
||
function renderKeyLayout(container, rows) {
|
||
container.innerHTML = '';
|
||
rows.flat().forEach((cell) => {
|
||
container.appendChild(createButton(cell));
|
||
});
|
||
}
|
||
|
||
function getStackValue(index) {
|
||
return calc.isValidIndex(index) ? calc.stack[index] : undefined;
|
||
}
|
||
|
||
function getDisplayValue(index) {
|
||
if (calc.isEditing) {
|
||
if (index === 0) {
|
||
return calc.inputValue;
|
||
}
|
||
return getStackValue(index - 1);
|
||
}
|
||
return getStackValue(index);
|
||
}
|
||
|
||
function hasStackSelection() {
|
||
return stackCursor !== null && calc.isValidIndex(stackCursor);
|
||
}
|
||
|
||
function clearStackSelection() {
|
||
stackCursor = null;
|
||
isMovingStackItem = false;
|
||
stackSnapshotBeforeMove = null;
|
||
stackViewOffset = 0;
|
||
}
|
||
|
||
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;
|
||
editRestoreValue = value;
|
||
} else {
|
||
calc.inputValue = '';
|
||
calc.isEditing = true;
|
||
editRestoreValue = null;
|
||
}
|
||
syncInputFromState();
|
||
}
|
||
|
||
function moveStackSelection(direction) {
|
||
if (!hasStackSelection()) {
|
||
if (direction === 'up') {
|
||
ensureValidSelection();
|
||
} else if (direction === 'down') {
|
||
reactivateEditOnX();
|
||
}
|
||
return;
|
||
}
|
||
|
||
const nextIndex = direction === 'up' ? stackCursor + 1 : stackCursor - 1;
|
||
if (calc.isValidIndex(nextIndex)) {
|
||
stackCursor = nextIndex;
|
||
}
|
||
}
|
||
|
||
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 getVisibleStackIndex(visualLine) {
|
||
return stackViewOffset + visualLine;
|
||
}
|
||
|
||
function clampStackViewOffset() {
|
||
const maxOffset = Math.max(0, calc.stack.length - 4);
|
||
if (stackViewOffset < 0) {
|
||
stackViewOffset = 0;
|
||
} else if (stackViewOffset > maxOffset) {
|
||
stackViewOffset = maxOffset;
|
||
}
|
||
}
|
||
|
||
function ensureSelectionVisible() {
|
||
if (!hasStackSelection()) {
|
||
stackViewOffset = 0;
|
||
return;
|
||
}
|
||
|
||
if (stackCursor < stackViewOffset) {
|
||
stackViewOffset = stackCursor;
|
||
} else if (stackCursor > stackViewOffset + 3) {
|
||
stackViewOffset = stackCursor - 3;
|
||
}
|
||
|
||
clampStackViewOffset();
|
||
}
|
||
|
||
function render() {
|
||
const names = ['T', 'Z', 'Y', 'X'];
|
||
const lines = [];
|
||
const showStackIndexes = hasStackSelection() || isMovingStackItem;
|
||
|
||
clampStackViewOffset();
|
||
ensureSelectionVisible();
|
||
|
||
for (let visualLine = 3; visualLine >= 0; visualLine -= 1) {
|
||
const stackIndex = getVisibleStackIndex(visualLine);
|
||
const value = getDisplayValue(stackIndex);
|
||
const isSelected = stackCursor === stackIndex;
|
||
const classes = ['stack-line'];
|
||
const label = showStackIndexes ? String(stackIndex) : names[3 - visualLine];
|
||
|
||
if (isSelected) {
|
||
classes.push(isMovingStackItem ? 'moving' : 'selected');
|
||
}
|
||
|
||
lines.push(`<div class="${classes.join(' ')}"><div class="label">${label}</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: ${stackCursor}`;
|
||
} else if (hasStackSelection()) {
|
||
displayEl.textContent = `SELECTED: ${stackCursor}`;
|
||
} else {
|
||
displayEl.textContent = 'READY';
|
||
}
|
||
inputValueLabel.textContent = calc.inputValue || '∅';
|
||
editingLabel.textContent = String(calc.isEditing);
|
||
modeLabel.textContent = calc.angleMode;
|
||
angleMode.value = calc.angleMode;
|
||
errorEl.textContent = '';
|
||
}
|
||
|
||
function pushEditingValueIfNeeded() {
|
||
if (!calc.isEditing) return;
|
||
if (calc.inputValue !== '') {
|
||
const value = calc.parseInputValue(calc.inputValue);
|
||
calc.push(value);
|
||
}
|
||
calc.inputValue = '';
|
||
calc.isEditing = false;
|
||
editRestoreValue = null;
|
||
syncInputFromState();
|
||
}
|
||
|
||
function execute(name) {
|
||
try {
|
||
if (name === 'enter') {
|
||
if (calc.isEditing) {
|
||
pushEditingValueIfNeeded();
|
||
} else if (calc.isValidIndex(0)) {
|
||
calc.push(getStackValue(0));
|
||
}
|
||
} else if (name === 'swap') {
|
||
pushEditingValueIfNeeded();
|
||
clearStackSelection();
|
||
if (calc.isValidIndex(1)) calc.swap(0, 1);
|
||
} else if (name === 'drop') {
|
||
pushEditingValueIfNeeded();
|
||
if (hasStackSelection()) {
|
||
calc.remove(stackCursor);
|
||
stackCursor = calc.isValidIndex(stackCursor) ? stackCursor : (calc.isValidIndex(stackCursor - 1) ? stackCursor - 1 : null);
|
||
} else if (calc.isValidIndex(0)) {
|
||
calc.remove(0);
|
||
}
|
||
commitMoveMode();
|
||
} else if (name === 'clear') {
|
||
calc.clear();
|
||
clearStackSelection();
|
||
} else {
|
||
pushEditingValueIfNeeded();
|
||
clearStackSelection();
|
||
calc.command(name);
|
||
}
|
||
syncInputFromState();
|
||
render();
|
||
} catch (error) {
|
||
errorEl.textContent = error.message;
|
||
}
|
||
}
|
||
|
||
function isInputChar(key) {
|
||
return /^[0-9a-fA-F.]$/.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 = '';
|
||
editRestoreValue = null;
|
||
}
|
||
if (key === 'Backspace') {
|
||
calc.inputValue = calc.inputValue.slice(0, -1);
|
||
} else {
|
||
calc.inputValue += key;
|
||
}
|
||
if (calc.inputValue === '') {
|
||
calc.isEditing = false;
|
||
editRestoreValue = null;
|
||
}
|
||
syncInputFromState();
|
||
}
|
||
|
||
function handleKeydown(event) {
|
||
if (shouldIgnoreKeyboardEvent(event)) {
|
||
return;
|
||
}
|
||
|
||
const action = getKeyboardAction(event);
|
||
if (!action) {
|
||
return;
|
||
}
|
||
|
||
try {
|
||
if (action.type === 'escapeKey') {
|
||
event.preventDefault();
|
||
handleEscapeAction();
|
||
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 (calc.isEditing) {
|
||
render();
|
||
return;
|
||
}
|
||
|
||
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();
|
||
});
|
||
|
||
renderKeyLayout(document.getElementById('functionsButtons'), keyLayouts.functions);
|
||
renderKeyLayout(document.getElementById('numbersButtons'), keyLayouts.numbers);
|
||
renderKeyLayout(document.getElementById('operatorsButtons'), keyLayouts.operators);
|
||
renderKeyLayout(document.getElementById('constButtons'), [topButtons.consts]);
|
||
document.getElementById('deleteButton').appendChild(createButton(topButtons.del));
|
||
document.getElementById('backspaceButton').appendChild(createButton(topButtons.backspace));
|
||
document.getElementById('escapeButton').appendChild(createButton(topButtons.escape));
|
||
|
||
render();
|
||
focusScreen();
|