444 lines
11 KiB
HTML
444 lines
11 KiB
HTML
<!doctype html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<title>HP48-style RPN Calculator</title>
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<style>
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:root {
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--body: #d8d8d8;
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--panel: #202020;
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--panel-2: #2b2b2b;
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--screen: #d8e7b8;
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--screen-text: #1b2a12;
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--screen-dim: #5b6f45;
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--key: #3a3a3a;
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--key-text: #f2f2f2;
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--accent: #8cff6d;
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--border: #111;
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}
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* { box-sizing: border-box; }
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body {
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margin: 0;
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font-family: Arial, sans-serif;
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background: linear-gradient(180deg, #efefef, var(--body));
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color: #111;
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}
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.wrap {
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max-width: 980px;
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margin: 0 auto;
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padding: 24px;
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}
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.calc {
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background: linear-gradient(180deg, #2f2f2f, #1f1f1f);
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border: 1px solid #111;
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border-radius: 20px;
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padding: 18px;
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box-shadow: 0 18px 48px rgba(0, 0, 0, 0.25);
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}
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.brand {
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color: #fafafa;
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display: flex;
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justify-content: space-between;
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align-items: baseline;
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margin-bottom: 12px;
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gap: 12px;
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}
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.brand h1 {
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margin: 0;
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font-size: 18px;
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letter-spacing: 0.06em;
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}
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.brand small {
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color: #c9c9c9;
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}
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.screen {
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background: linear-gradient(180deg, #dbe8b8, var(--screen));
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color: var(--screen-text);
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border: 2px inset #8aa36b;
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border-radius: 10px;
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padding: 14px;
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min-height: 190px;
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font-family: "Courier New", monospace;
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display: grid;
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grid-template-rows: auto auto 1fr;
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gap: 10px;
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}
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.screen-top {
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display: flex;
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justify-content: space-between;
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gap: 12px;
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font-size: 12px;
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color: var(--screen-dim);
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}
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.stack {
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border-top: 1px solid rgba(27, 42, 18, 0.35);
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padding-top: 10px;
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line-height: 1.5;
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font-size: 18px;
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white-space: pre-wrap;
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}
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.stack-line {
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display: grid;
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grid-template-columns: 26px 1fr;
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gap: 8px;
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}
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.stack-line .label {
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text-align: right;
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color: var(--screen-dim);
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}
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.hidden-input {
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position: absolute;
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left: -9999px;
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width: 1px;
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height: 1px;
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opacity: 0;
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pointer-events: none;
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}
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.input-row {
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display: grid;
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grid-template-columns: 1fr 150px;
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gap: 12px;
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margin-top: 14px;
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}
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input, select, button {
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border-radius: 10px;
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border: 1px solid #000;
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font: inherit;
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}
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input, select {
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padding: 12px 14px;
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background: #f7f7f7;
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color: #111;
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}
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.panel {
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margin-top: 14px;
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background: rgba(255, 255, 255, 0.04);
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border: 1px solid rgba(255, 255, 255, 0.08);
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border-radius: 14px;
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padding: 14px;
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}
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.title {
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color: #fff;
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margin: 0 0 10px;
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font-size: 14px;
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text-transform: uppercase;
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letter-spacing: 0.08em;
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}
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.buttons {
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display: grid;
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gap: 8px;
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grid-template-columns: repeat(auto-fit, minmax(92px, 1fr));
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}
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button {
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padding: 12px 10px;
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background: linear-gradient(180deg, #4a4a4a, var(--key));
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color: var(--key-text);
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cursor: pointer;
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box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
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}
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button:hover { filter: brightness(1.08); }
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button:active { transform: translateY(1px); }
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.status {
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margin-top: 12px;
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display: flex;
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flex-wrap: wrap;
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gap: 10px;
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color: #ececec;
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font-size: 13px;
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}
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.pill {
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border: 1px solid rgba(255, 255, 255, 0.15);
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border-radius: 999px;
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padding: 5px 10px;
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background: rgba(255, 255, 255, 0.05);
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}
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.error {
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margin-top: 10px;
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min-height: 20px;
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color: #ff8a8a;
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font-family: "Courier New", monospace;
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font-size: 13px;
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}
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.hint {
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color: #ddd;
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margin-top: 10px;
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font-size: 13px;
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line-height: 1.5;
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}
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</style>
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</head>
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<body>
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<div class="wrap">
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<div class="calc">
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<div class="brand">
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<h1>HP48-style RPN</h1>
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<small>powered by src/rpn-calculator.js</small>
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</div>
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<div class="screen" id="screen" tabindex="0" role="application" aria-label="HP48 style calculator screen">
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<div class="screen-top">
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<div>RPN stack</div>
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<div id="modeLabel">deg</div>
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</div>
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<div id="stack" class="stack"></div>
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<div id="display"></div>
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</div>
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<input id="input" class="hidden-input" type="text" autocomplete="off" aria-hidden="true" tabindex="-1">
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<div class="input-row">
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<div class="hint">Keyboard input is captured directly by the screen</div>
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<select id="angleMode">
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<option value="deg">Degrees</option>
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<option value="rad">Radians</option>
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<option value="grad">Grads</option>
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</select>
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</div>
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<div class="status">
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<div class="pill">inputValue: <span id="inputValueLabel"></span></div>
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<div class="pill">isEditing: <span id="editingLabel"></span></div>
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</div>
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<div class="panel">
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<div class="title">Stack</div>
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<div class="buttons" id="stackButtons"></div>
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</div>
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<div class="panel">
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<div class="title">Arithmetic</div>
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<div class="buttons" id="arithButtons"></div>
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</div>
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<div class="panel">
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<div class="title">Trigonometry</div>
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<div class="buttons" id="trigButtons"></div>
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</div>
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<div class="panel">
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<div class="title">Constants</div>
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<div class="buttons" id="constButtons"></div>
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</div>
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<div id="error" class="error"></div>
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<div class="hint">Use Enter to commit the current value. Buttons call <code>command(...)</code> directly, like a real RPN demo.</div>
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</div>
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</div>
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<script src="../../src/rpn-calculator.js"></script>
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<script>
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const calc = new RpnCalculator({ angleMode: 'deg' });
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const input = document.getElementById('input');
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const screen = document.getElementById('screen');
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const stackEl = document.getElementById('stack');
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const displayEl = document.getElementById('display');
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const errorEl = document.getElementById('error');
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const inputValueLabel = document.getElementById('inputValueLabel');
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const editingLabel = document.getElementById('editingLabel');
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const modeLabel = document.getElementById('modeLabel');
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const angleMode = document.getElementById('angleMode');
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const groups = {
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stack: ['enter', 'dup', 'drop', 'swap', 'clear'],
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arithmetic: ['add', 'sub', 'mul', 'div', 'mod', 'pow', 'sqr', 'neg', 'sqrt', 'recip', 'log', 'ln'],
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trig: ['sin', 'cos', 'tan', 'asin', 'acos', 'atan'],
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const: ['pi', 'e'],
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};
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function labelFor(command) {
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return ({ add: '+', sub: '−', mul: '×', div: '÷', pow: 'y^x', recip: '1/x', sqr: 'x²' }[command] || command);
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}
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function addButtons(container, commands) {
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container.innerHTML = '';
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commands.forEach((commandName) => {
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const button = document.createElement('button');
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button.textContent = labelFor(commandName);
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button.addEventListener('click', () => execute(commandName));
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container.appendChild(button);
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});
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}
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function getLineValue(line) {
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if (line === 0 && calc.isEditing) {
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return calc.inputValue;
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}
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return calc.stack[line];
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}
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function render() {
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const names = ['T', 'Z', 'Y', 'X'];
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const lines = [];
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for (let line = 3; line >= 0; line -= 1) {
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const value = getLineValue(line);
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lines.push(`<div class="stack-line"><div class="label">${names[3 - line]}</div><div>${value !== undefined && value !== '' ? calc.formatNumber(value) : ''}</div></div>`);
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}
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stackEl.innerHTML = lines.join('');
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displayEl.textContent = calc.isEditing ? `ENTERING: ${calc.inputValue}` : 'READY';
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inputValueLabel.textContent = calc.inputValue || '∅';
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editingLabel.textContent = String(calc.isEditing);
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modeLabel.textContent = calc.angleMode;
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angleMode.value = calc.angleMode;
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errorEl.textContent = '';
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}
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function pushEditingValueIfNeeded() {
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if (!calc.isEditing) return;
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if (calc.inputValue !== '') {
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const value = calc.parseInputValue(calc.inputValue);
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if (calc.stack.length >= calc.maxSize) {
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throw new Error('Stack overflow');
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}
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calc.stack.unshift(value);
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if (calc.stack.length > 4) calc.stack.length = 4;
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}
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calc.inputValue = '';
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calc.isEditing = false;
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syncInputFromState();
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}
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function execute(name) {
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try {
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if (name === 'swap') {
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pushEditingValueIfNeeded();
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if (calc.stack.length >= 2) calc.swap(0, 1);
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} else if (name === 'drop') {
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pushEditingValueIfNeeded();
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if (calc.stack.length >= 1) calc.remove(0);
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} else if (name === 'clear') {
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calc.clear();
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} else if (name === 'enter') {
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if (calc.isEditing) {
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pushEditingValueIfNeeded();
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}
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} else {
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pushEditingValueIfNeeded();
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calc.command(name);
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}
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syncInputFromState();
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render();
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} catch (error) {
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errorEl.textContent = error.message;
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}
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}
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function isInputChar(key) {
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return /^[0-9a-fA-F.+\-]$/.test(key);
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}
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function focusScreen() {
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screen.focus();
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}
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function syncInputFromState() {
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input.value = calc.inputValue;
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}
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function editXWithKey(key) {
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if (!calc.isEditing) {
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pushEditingValueIfNeeded();
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calc.isEditing = true;
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calc.inputValue = '';
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}
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if (key === 'Backspace') {
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calc.inputValue = calc.inputValue.slice(0, -1);
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} else {
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calc.inputValue += key;
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}
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if (calc.inputValue === '') {
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calc.isEditing = false;
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}
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syncInputFromState();
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}
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screen.addEventListener('keydown', (event) => {
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try {
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if (event.key === 'Enter') {
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event.preventDefault();
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if (calc.isEditing) {
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calc.command('enter');
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}
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render();
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return;
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}
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if (event.key === 'Backspace') {
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event.preventDefault();
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if (calc.isEditing) {
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editXWithKey('Backspace');
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render();
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}
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return;
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}
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if (isInputChar(event.key)) {
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event.preventDefault();
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editXWithKey(event.key);
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render();
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return;
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}
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const keyMap = {
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'+': 'add',
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'-': 'sub',
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'*': 'mul',
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'/': 'div',
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'%': 'mod',
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'^': 'pow',
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};
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if (keyMap[event.key]) {
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event.preventDefault();
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execute(keyMap[event.key]);
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}
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} catch (error) {
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errorEl.textContent = error.message;
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}
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});
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screen.addEventListener('click', focusScreen);
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window.addEventListener('load', focusScreen);
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angleMode.addEventListener('change', (event) => {
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calc.angleMode = event.target.value;
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render();
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});
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addButtons(document.getElementById('stackButtons'), groups.stack);
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addButtons(document.getElementById('arithButtons'), groups.arithmetic);
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addButtons(document.getElementById('trigButtons'), groups.trig);
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addButtons(document.getElementById('constButtons'), groups.const);
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render();
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focusScreen();
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</script>
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</body>
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</html> |