6CCS3PRJ_Lei-Ding_Distributed-Mutex-Explorer/index.html at main · leiding01/6CCS3PRJ_Lei-Ding_Distributed-Mutex-Explorer · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
  <title>Distributed Mutual Exclusion Explorer (v0.3)</title>
  <style>
    :root {
      --border: #d0d0d0;
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      --bg: #fff;
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      --ok: #0a7d00;
      --bad: #a10000;
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      display: flex;
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      grid-template-columns: 1fr 1fr;
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    #previewCanvas {
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  </style>
</head>

<body>
  <header>
    <h1>Distributed Mutual Exclusion Explorer (v0.3)</h1>
    <span class="pill">token ring + Ricart–Agrawala · step/run · faults · JSON/PNG export</span>
  </header>
  <p class="note">
    An interactive, browser-based simulator to visualise distributed mutual exclusion. Configure processes, issue requests for a critical section, and observe how tokens or messages enforce exclusivity. The prototype supports token loss, process crash/recovery, and basic message loss (RA).
  </p>

  <div class="grid">
    <fieldset>
      <legend>Configuration</legend>
      <div class="row">
        <label for="algorithmSelect">Algorithm:</label>
        <select id="algorithmSelect">
          <option value="TokenRing" selected>Token Ring (implemented)</option>
          <option value="RA">Ricart–Agrawala (prototype)</option>
        </select>
      </div>
      <div class="row">
        <label for="procCount">Processes:</label>
        <input id="procCount" type="number" min="2" max="12" value="4" />
        <button id="applyConfigBtn">Apply (reset)</button>
        <span class="pill" id="modePill">interactive</span>
      </div>
      <p class="note">Keep small numbers (3–8) for clarity. Apply resets the simulation state.</p>
    </fieldset>

    <fieldset>
      <legend>Controls</legend>
      <div class="row">
        <button id="stepBtn">Step</button>
        <button id="runBtn">Run</button>
        <button id="pauseBtn" disabled>Pause</button>
        <button id="resetBtn">Reset</button>
      </div>
      <div class="row">
        <label for="speedMs">Run speed (ms):</label>
        <input id="speedMs" type="number" min="50" max="2000" value="350" />
      </div>
      <div class="row">
        <button id="dropTokenBtn">Drop token</button>
        <button id="regenTokenBtn">Regenerate token</button>
        <button id="dropNextMsgBtn">Drop next in-flight msg</button>
        <button id="toggleDropNextSendBtn">Arm drop-next-send</button>
        <button id="clearTraceBtn">Clear trace</button>
      </div>
      <div class="row">
        <div>Safety: <strong id="safetyLabel">—</strong></div>
        <span class="pill" id="metricsPill">—</span>
      </div>
      <p class="note">Token controls apply to Token Ring. For Ricart–Agrawala, “Drop next in-flight msg” removes the queue head; “drop-next-send” drops the next outgoing message.</p>
    </fieldset>
  </div>

  <fieldset>
    <legend>Processes</legend>
    <table>
      <thead>
        <tr>
          <th style="width: 120px;">Process</th>
          <th>Status</th>
          <th style="width: 80px;">Token</th>
          <th style="width: 360px;">Actions</th>
        </tr>
      </thead>
      <tbody id="procTable"></tbody>
    </table>
    <p class="note">Status shows whether a process is requesting access or is currently in the critical section.</p>
  </fieldset>

  <fieldset>
    <legend>Network (messages)</legend>
    <table>
      <thead>
        <tr>
          <th style="width: 70px;">ID</th>
          <th style="width: 90px;">Type</th>
          <th style="width: 120px;">From</th>
          <th style="width: 120px;">To</th>
          <th style="width: 90px;">TS</th>
        </tr>
      </thead>
      <tbody id="msgTable"></tbody>
    </table>
    <p class="note">For Ricart–Agrawala, each Step typically delivers one message from the queue.</p>
  </fieldset>

  <fieldset>
    <legend>Scenarios</legend>
    <div class="row">
      <button id="exportBtn">Export JSON (state)</button>
      <button id="exportTraceBtn">Export trace (txt)</button>
      <button id="exportAllBtn">Export evidence (JSON+trace+PNG)</button>
      <input id="importFile" type="file" accept="application/json" />
      <button id="loadExampleInteractiveBtn">Load example (interactive)</button>
      <button id="loadExampleScriptBtn">Load example (scripted)</button>
      <button id="loadCrashDemoBtn">Load crash demo (scripted)</button>
      <button id="loadRaDemoBtn">Load RA conflict demo (scripted)</button>
      <button id="loadRaTieDemoBtn">Load RA tiebreak demo (scripted)</button>
      <button id="exitScriptBtn" disabled>Exit script mode</button>
    </div>
    <p class="note">Interactive mode lets you issue requests manually. Scripted mode replays a predefined event sequence from a JSON scenario file. Exports use a session timestamp + snapshot counter for easier evidence management.</p>
  </fieldset>

  <fieldset>
    <legend>Trace</legend>
    <div id="trace">—</div>
  </fieldset>

  <fieldset>
    <legend>Preview & Export PNG</legend>
    <div class="row">
      <button id="redrawBtn">Redraw</button>
      <button id="exportPngBtn">Export PNG</button>
    </div>
    <canvas id="previewCanvas" width="900" height="520"></canvas>
    <p class="note">The preview uses a circular layout. Token Ring shows token position; RA highlights the next message to be delivered.</p>
  </fieldset>

  <script type="module" src="./mutex_main.js"></script>
</body>
</html>