docs: refresh README and add HP48-style browser demo
This commit is contained in:
@@ -11,7 +11,107 @@ This project defines a reusable RPN calculator engine with:
|
||||
- centralized command metadata
|
||||
- a browser demo that uses the same public API as any consumer code
|
||||
|
||||
## Package contents
|
||||
# RPN Virtual Calculator
|
||||
|
||||
A browser-friendly RPN calculator built around a small, generic JavaScript API.
|
||||
|
||||
## Goal
|
||||
|
||||
This project provides a reusable Reverse Polish Notation (RPN) calculator engine with:
|
||||
|
||||
- a simple stack-based public API
|
||||
- configurable numeric behavior
|
||||
- centralized command metadata
|
||||
- browser demos that use the same public API as any consumer code
|
||||
|
||||
## Project structure
|
||||
|
||||
- `src/rpn-calculator.js`: calculator engine
|
||||
- `samples/dev/index.html`: browser demo
|
||||
- `samples/hp48/index.html`: HP48-style browser demo
|
||||
|
||||
## Main features
|
||||
|
||||
- Single JavaScript class: `RpnCalculator`
|
||||
- Configurable stack size via `maxSize` (default: `2048`)
|
||||
- Configurable numeric base via `base` (default: `10`)
|
||||
- Configurable angle mode via `angleMode`:
|
||||
- `deg` (default)
|
||||
- `rad`
|
||||
- `grad`
|
||||
- Optional command filtering through `enabledCommands`
|
||||
- Public API limited to generic methods:
|
||||
- `push(value)`
|
||||
- `pop()`
|
||||
- `clear()`
|
||||
- `swap(index1, index2)`
|
||||
- `remove(index)`
|
||||
- `edit(index)`
|
||||
- `isValidIndex(index)`
|
||||
- `input(command)`
|
||||
- `command(name, ...args)`
|
||||
- `inputValue` is always stored as a string
|
||||
- `isEditing` is exposed as a boolean
|
||||
- Supported operations are centralized in one dictionary with metadata such as:
|
||||
- `argCount`
|
||||
- `category`
|
||||
- `aliases`
|
||||
- Supported categories are limited to:
|
||||
- `Stack`
|
||||
- `Arithmetic`
|
||||
- `Trigonometry`
|
||||
## Available constants
|
||||
|
||||
- `pi`
|
||||
- `e`
|
||||
|
||||
## Supported commands
|
||||
|
||||
### Arithmetic
|
||||
- `add` (`+`)
|
||||
- `sub` (`-`)
|
||||
- `mul` (`*`)
|
||||
- `div` (`/`)
|
||||
- `mod` (`%`)
|
||||
- `pow` (`^`, `y^x`)
|
||||
- `sqr`
|
||||
- `neg`
|
||||
- `sqrt`
|
||||
- `recip` (`1/x`)
|
||||
- `log`
|
||||
- `ln`
|
||||
|
||||
### Trigonometry
|
||||
- `sin`
|
||||
- `cos`
|
||||
- `tan`
|
||||
- `asin`
|
||||
- `acos`
|
||||
- `atan`
|
||||
|
||||
### Stack
|
||||
- `dup`
|
||||
- `drop`
|
||||
- `swap`
|
||||
- `clear`
|
||||
- `enter`
|
||||
|
||||
## Behavior rules
|
||||
|
||||
- `mod` is a percentage operator:
|
||||
- `a b % => (a * b) / 100`
|
||||
- `log` uses `Math.log10`
|
||||
- `ln` uses `Math.log`
|
||||
- `sqrt`, `asin`, `acos`, `log`, and `ln` throw explicit domain errors on invalid input
|
||||
- Trigonometric behavior depends on `angleMode`
|
||||
- In degree mode:
|
||||
- `sin`, `cos`, `tan` convert degrees to radians internally
|
||||
- `asin`, `acos`, `atan` return degrees
|
||||
- `inputValue` remains a string to preserve future support for formats such as hexadecimal input
|
||||
|
||||
## Basic usage
|
||||
|
||||
### In a browser
|
||||
- `rpn-calculator.js`: calculator engine
|
||||
- `rpn-example.html`: example browser interface
|
||||
|
||||
|
||||
@@ -0,0 +1,444 @@
|
||||
<!doctype html>
|
||||
<html lang="en">
|
||||
<head>
|
||||
<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;
|
||||
}
|
||||
|
||||
.stack-line .label {
|
||||
text-align: right;
|
||||
color: var(--screen-dim);
|
||||
}
|
||||
|
||||
.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>
|
||||
</head>
|
||||
<body>
|
||||
<div class="wrap">
|
||||
<div class="calc">
|
||||
<div class="brand">
|
||||
<h1>HP48-style RPN</h1>
|
||||
<small>powered by src/rpn-calculator.js</small>
|
||||
</div>
|
||||
|
||||
<div class="screen" id="screen" tabindex="0" role="application" aria-label="HP48 style calculator screen">
|
||||
<div class="screen-top">
|
||||
<div>RPN stack</div>
|
||||
<div id="modeLabel">deg</div>
|
||||
</div>
|
||||
<div id="stack" class="stack"></div>
|
||||
<div id="display"></div>
|
||||
</div>
|
||||
|
||||
<input id="input" class="hidden-input" type="text" autocomplete="off" aria-hidden="true" tabindex="-1">
|
||||
|
||||
<div class="input-row">
|
||||
<div class="hint">Keyboard input is captured directly by the screen</div>
|
||||
<select id="angleMode">
|
||||
<option value="deg">Degrees</option>
|
||||
<option value="rad">Radians</option>
|
||||
<option value="grad">Grads</option>
|
||||
</select>
|
||||
</div>
|
||||
|
||||
<div class="status">
|
||||
<div class="pill">inputValue: <span id="inputValueLabel"></span></div>
|
||||
<div class="pill">isEditing: <span id="editingLabel"></span></div>
|
||||
</div>
|
||||
|
||||
<div class="panel">
|
||||
<div class="title">Stack</div>
|
||||
<div class="buttons" id="stackButtons"></div>
|
||||
</div>
|
||||
|
||||
<div class="panel">
|
||||
<div class="title">Arithmetic</div>
|
||||
<div class="buttons" id="arithButtons"></div>
|
||||
</div>
|
||||
|
||||
<div class="panel">
|
||||
<div class="title">Trigonometry</div>
|
||||
<div class="buttons" id="trigButtons"></div>
|
||||
</div>
|
||||
|
||||
<div class="panel">
|
||||
<div class="title">Constants</div>
|
||||
<div class="buttons" id="constButtons"></div>
|
||||
</div>
|
||||
|
||||
<div id="error" class="error"></div>
|
||||
<div class="hint">Use Enter to commit the current value. Buttons call <code>command(...)</code> directly, like a real RPN demo.</div>
|
||||
</div>
|
||||
</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'],
|
||||
};
|
||||
|
||||
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 getLineValue(line) {
|
||||
if (calc.isEditing) {
|
||||
if (line === 0) {
|
||||
return calc.inputValue;
|
||||
}
|
||||
return calc.stack[line - 1];
|
||||
}
|
||||
return calc.stack[line];
|
||||
}
|
||||
|
||||
function render() {
|
||||
const names = ['T', 'Z', 'Y', 'X'];
|
||||
const lines = [];
|
||||
for (let line = 3; line >= 0; line -= 1) {
|
||||
const value = getLineValue(line);
|
||||
lines.push(`<div class="stack-line"><div class="label">${names[3 - line]}</div><div>${value !== undefined && value !== '' ? calc.formatNumber(value) : ''}</div></div>`);
|
||||
}
|
||||
|
||||
stackEl.innerHTML = lines.join('');
|
||||
displayEl.textContent = calc.isEditing ? `ENTERING: ${calc.inputValue}` : 'READY';
|
||||
inputValueLabel.textContent = calc.inputValue || '∅';
|
||||
editingLabel.textContent = String(calc.isEditing);
|
||||
modeLabel.textContent = calc.angleMode;
|
||||
angleMode.value = calc.angleMode;
|
||||
errorEl.textContent = '';
|
||||
}
|
||||
|
||||
function pushEditingValueIfNeeded() {
|
||||
if (!calc.isEditing) return;
|
||||
if (calc.inputValue !== '') {
|
||||
const value = calc.parseInputValue(calc.inputValue);
|
||||
if (calc.stack.length >= calc.maxSize) {
|
||||
throw new Error('Stack overflow');
|
||||
}
|
||||
calc.stack.unshift(value);
|
||||
if (calc.stack.length > 4) calc.stack.length = 4;
|
||||
}
|
||||
calc.inputValue = '';
|
||||
calc.isEditing = false;
|
||||
syncInputFromState();
|
||||
}
|
||||
|
||||
function execute(name) {
|
||||
try {
|
||||
if (name === 'swap') {
|
||||
pushEditingValueIfNeeded();
|
||||
if (calc.stack.length >= 2) calc.swap(0, 1);
|
||||
} else if (name === 'drop') {
|
||||
pushEditingValueIfNeeded();
|
||||
if (calc.stack.length >= 1) calc.remove(0);
|
||||
} else if (name === 'clear') {
|
||||
calc.clear();
|
||||
} else if (name === 'enter') {
|
||||
if (calc.isEditing) {
|
||||
pushEditingValueIfNeeded();
|
||||
}
|
||||
} else {
|
||||
pushEditingValueIfNeeded();
|
||||
calc.command(name);
|
||||
}
|
||||
syncInputFromState();
|
||||
render();
|
||||
} catch (error) {
|
||||
errorEl.textContent = error.message;
|
||||
}
|
||||
}
|
||||
|
||||
function isInputChar(key) {
|
||||
return /^[0-9a-fA-F.+\-]$/.test(key);
|
||||
}
|
||||
|
||||
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();
|
||||
}
|
||||
|
||||
screen.addEventListener('keydown', (event) => {
|
||||
try {
|
||||
if (event.key === 'Enter') {
|
||||
event.preventDefault();
|
||||
execute('enter');
|
||||
return;
|
||||
}
|
||||
|
||||
if (event.key === 'Backspace') {
|
||||
event.preventDefault();
|
||||
if (calc.isEditing) {
|
||||
editXWithKey('Backspace');
|
||||
render();
|
||||
}
|
||||
return;
|
||||
}
|
||||
|
||||
if (isInputChar(event.key)) {
|
||||
event.preventDefault();
|
||||
editXWithKey(event.key);
|
||||
render();
|
||||
return;
|
||||
}
|
||||
|
||||
const keyMap = {
|
||||
'+': 'add',
|
||||
'-': 'sub',
|
||||
'*': 'mul',
|
||||
'/': 'div',
|
||||
'%': 'mod',
|
||||
'^': 'pow',
|
||||
};
|
||||
|
||||
if (keyMap[event.key]) {
|
||||
event.preventDefault();
|
||||
execute(keyMap[event.key]);
|
||||
}
|
||||
} catch (error) {
|
||||
errorEl.textContent = error.message;
|
||||
}
|
||||
});
|
||||
|
||||
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>
|
||||
</body>
|
||||
</html>
|
||||
@@ -1,308 +0,0 @@
|
||||
<!doctype html>
|
||||
<html lang="en">
|
||||
<head>
|
||||
<meta charset="utf-8">
|
||||
<meta name="viewport" content="width=device-width, initial-scale=1">
|
||||
<title>RPN Calculator Demo</title>
|
||||
<style>
|
||||
:root {
|
||||
color-scheme: light dark;
|
||||
--bg: #f4f4f4;
|
||||
--panel: #ffffff;
|
||||
--text: #111;
|
||||
--muted: #666;
|
||||
--button: #e9e9e9;
|
||||
--button-text: #111;
|
||||
--border: #d0d0d0;
|
||||
--accent: #0a7;
|
||||
}
|
||||
|
||||
@media (prefers-color-scheme: dark) {
|
||||
:root {
|
||||
--bg: #111;
|
||||
--panel: #1a1a1a;
|
||||
--text: #f3f3f3;
|
||||
--muted: #aaa;
|
||||
--button: #2a2a2a;
|
||||
--button-text: #f3f3f3;
|
||||
--border: #333;
|
||||
--accent: #3dc;
|
||||
}
|
||||
}
|
||||
|
||||
body {
|
||||
margin: 0;
|
||||
font-family: Arial, sans-serif;
|
||||
background: var(--bg);
|
||||
color: var(--text);
|
||||
}
|
||||
|
||||
.app {
|
||||
max-width: 860px;
|
||||
margin: 24px auto;
|
||||
padding: 16px;
|
||||
}
|
||||
|
||||
.card {
|
||||
background: var(--panel);
|
||||
border: 1px solid var(--border);
|
||||
border-radius: 12px;
|
||||
padding: 16px;
|
||||
}
|
||||
|
||||
.display {
|
||||
background: #000;
|
||||
color: #0f0;
|
||||
border-radius: 10px;
|
||||
padding: 12px;
|
||||
font-family: monospace;
|
||||
min-height: 72px;
|
||||
white-space: pre-wrap;
|
||||
overflow-wrap: anywhere;
|
||||
}
|
||||
|
||||
.grid {
|
||||
display: grid;
|
||||
grid-template-columns: repeat(auto-fit, minmax(92px, 1fr));
|
||||
gap: 8px;
|
||||
margin-top: 12px;
|
||||
}
|
||||
|
||||
button, select, input {
|
||||
border: 1px solid var(--border);
|
||||
background: var(--button);
|
||||
color: var(--button-text);
|
||||
border-radius: 8px;
|
||||
padding: 10px 12px;
|
||||
font-size: 15px;
|
||||
}
|
||||
|
||||
button {
|
||||
cursor: pointer;
|
||||
}
|
||||
|
||||
input, select {
|
||||
width: 100%;
|
||||
box-sizing: border-box;
|
||||
background: var(--panel);
|
||||
color: var(--text);
|
||||
font-size: 16px;
|
||||
}
|
||||
|
||||
.row {
|
||||
display: grid;
|
||||
grid-template-columns: 1fr 180px;
|
||||
gap: 12px;
|
||||
margin-top: 12px;
|
||||
align-items: end;
|
||||
}
|
||||
|
||||
.stack {
|
||||
margin-top: 12px;
|
||||
font-family: monospace;
|
||||
line-height: 1.5;
|
||||
}
|
||||
|
||||
.muted {
|
||||
color: var(--muted);
|
||||
font-size: 14px;
|
||||
}
|
||||
|
||||
.section-title {
|
||||
margin: 16px 0 8px;
|
||||
font-size: 14px;
|
||||
color: var(--muted);
|
||||
text-transform: uppercase;
|
||||
letter-spacing: 0.04em;
|
||||
}
|
||||
|
||||
.status {
|
||||
display: flex;
|
||||
gap: 12px;
|
||||
flex-wrap: wrap;
|
||||
margin-top: 12px;
|
||||
color: var(--muted);
|
||||
font-size: 14px;
|
||||
}
|
||||
|
||||
.badge {
|
||||
border: 1px solid var(--border);
|
||||
border-radius: 999px;
|
||||
padding: 4px 10px;
|
||||
background: rgba(0, 0, 0, 0.04);
|
||||
}
|
||||
|
||||
.accent {
|
||||
color: var(--accent);
|
||||
}
|
||||
</style>
|
||||
</head>
|
||||
<body>
|
||||
<div class="app">
|
||||
<div class="card">
|
||||
<h1>RPN Calculator Demo</h1>
|
||||
|
||||
<div id="display" class="display"></div>
|
||||
<div id="stack" class="stack"></div>
|
||||
|
||||
<div class="row">
|
||||
<label>
|
||||
<div class="section-title">Input</div>
|
||||
<input id="input" type="text" placeholder="Type a number, pi, e, or a command, then press Enter" autocomplete="off">
|
||||
</label>
|
||||
|
||||
<label>
|
||||
<div class="section-title">Angle mode</div>
|
||||
<select id="angleMode">
|
||||
<option value="deg">Degrees</option>
|
||||
<option value="rad">Radians</option>
|
||||
<option value="grad">Grads</option>
|
||||
</select>
|
||||
</label>
|
||||
</div>
|
||||
|
||||
<div class="status">
|
||||
<div class="badge">Mode: <span id="angleModeLabel" class="accent"></span></div>
|
||||
<div class="badge">Base: <span id="baseLabel" class="accent"></span></div>
|
||||
</div>
|
||||
|
||||
<div class="section-title">Constants</div>
|
||||
<div class="grid">
|
||||
<button data-const="pi">pi</button>
|
||||
<button data-const="e">e</button>
|
||||
</div>
|
||||
|
||||
<div class="section-title">Stack</div>
|
||||
<div class="grid">
|
||||
<button data-cmd="enter">Enter</button>
|
||||
<button data-cmd="dup">Dup</button>
|
||||
<button data-cmd="swap">Swap top 2</button>
|
||||
<button data-cmd="drop">Drop</button>
|
||||
<button data-cmd="clear">Clear</button>
|
||||
</div>
|
||||
|
||||
<div class="section-title">Arithmetic</div>
|
||||
<div class="grid">
|
||||
<button data-cmd="add">+</button>
|
||||
<button data-cmd="sub">−</button>
|
||||
<button data-cmd="mul">×</button>
|
||||
<button data-cmd="div">÷</button>
|
||||
<button data-cmd="mod">%</button>
|
||||
<button data-cmd="pow">y^x</button>
|
||||
<button data-cmd="sqr">x²</button>
|
||||
<button data-cmd="neg">±</button>
|
||||
<button data-cmd="sqrt">sqrt</button>
|
||||
<button data-cmd="recip">1/x</button>
|
||||
<button data-cmd="log">log</button>
|
||||
<button data-cmd="ln">ln</button>
|
||||
</div>
|
||||
|
||||
<div class="section-title">Trigonometry</div>
|
||||
<div class="grid">
|
||||
<button data-cmd="sin">sin</button>
|
||||
<button data-cmd="cos">cos</button>
|
||||
<button data-cmd="tan">tan</button>
|
||||
<button data-cmd="asin">asin</button>
|
||||
<button data-cmd="acos">acos</button>
|
||||
<button data-cmd="atan">atan</button>
|
||||
</div>
|
||||
|
||||
<p class="muted">Tip: trig functions follow the selected angle mode. Domain errors are reported with clear messages. sqrt computes the square root of the top stack value.</p>
|
||||
</div>
|
||||
</div>
|
||||
|
||||
<script src="../../src/rpn-calculator.js"></script>
|
||||
<script>
|
||||
const enabledCommands = ['add', 'sub', 'mul', 'div', 'mod', 'pow', 'sqr', 'neg', 'sqrt', 'recip', 'sin', 'cos', 'tan', 'asin', 'acos', 'atan', 'log', 'ln', 'dup', 'swap', 'drop', 'clear', 'enter'];
|
||||
const calc = new RpnCalculator({ angleMode: 'deg', enabledCommands });
|
||||
|
||||
const display = document.getElementById('display');
|
||||
const stack = document.getElementById('stack');
|
||||
const input = document.getElementById('input');
|
||||
const angleMode = document.getElementById('angleMode');
|
||||
const angleModeLabel = document.getElementById('angleModeLabel');
|
||||
const baseLabel = document.getElementById('baseLabel');
|
||||
|
||||
function render() {
|
||||
display.textContent = calc.isEditing ? `Editing: ${calc.inputValue}` : 'Ready';
|
||||
stack.innerHTML = calc.stack.length
|
||||
? calc.stack.map((value, index) => `<div>${index}: ${value}</div>`).join('')
|
||||
: '<span class="muted">Stack empty</span>';
|
||||
angleMode.value = calc.angleMode;
|
||||
angleModeLabel.textContent = calc.angleMode;
|
||||
baseLabel.textContent = String(calc.base);
|
||||
}
|
||||
|
||||
function commitInput() {
|
||||
if (input.value.trim() !== '') {
|
||||
calc.inputValue = input.value;
|
||||
calc.isEditing = true;
|
||||
calc.command('enter');
|
||||
input.value = '';
|
||||
}
|
||||
}
|
||||
|
||||
function runCommand(name) {
|
||||
if (name === 'swap') {
|
||||
if (calc.stack.length >= 2) calc.swap(0, 1);
|
||||
return;
|
||||
}
|
||||
if (name === 'enter') {
|
||||
commitInput();
|
||||
return;
|
||||
}
|
||||
calc.command(name);
|
||||
}
|
||||
|
||||
input.addEventListener('input', (event) => {
|
||||
calc.inputValue = event.target.value;
|
||||
calc.isEditing = event.target.value.length > 0;
|
||||
render();
|
||||
});
|
||||
|
||||
input.addEventListener('keydown', (event) => {
|
||||
if (event.key === 'Enter') {
|
||||
event.preventDefault();
|
||||
try {
|
||||
commitInput();
|
||||
render();
|
||||
} catch (error) {
|
||||
alert(error.message);
|
||||
}
|
||||
}
|
||||
});
|
||||
|
||||
angleMode.addEventListener('change', (event) => {
|
||||
calc.angleMode = ['deg', 'rad', 'grad'].includes(event.target.value) ? event.target.value : 'deg';
|
||||
render();
|
||||
});
|
||||
|
||||
document.querySelectorAll('button[data-cmd]').forEach((button) => {
|
||||
button.addEventListener('click', () => {
|
||||
try {
|
||||
runCommand(button.dataset.cmd);
|
||||
render();
|
||||
} catch (error) {
|
||||
alert(error.message);
|
||||
}
|
||||
});
|
||||
});
|
||||
|
||||
document.querySelectorAll('button[data-const]').forEach((button) => {
|
||||
button.addEventListener('click', () => {
|
||||
try {
|
||||
calc.inputValue = '';
|
||||
calc.isEditing = false;
|
||||
calc.command(button.dataset.const);
|
||||
input.value = '';
|
||||
render();
|
||||
} catch (error) {
|
||||
alert(error.message);
|
||||
}
|
||||
});
|
||||
});
|
||||
|
||||
render();
|
||||
</script>
|
||||
</body>
|
||||
</html>
|
||||
Reference in New Issue
Block a user