leetcode-visual/T192-sort-quick-sort.html at main · houbb/leetcode-visual · GitHub

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<!DOCTYPE html>
<html lang="zh">
<head>
  <meta charset="UTF-8" />
  <title>T192 快速排序可视化</title>
  <style>
    body {
      font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
      background: #f5f5f5;
      padding: 20px;
      text-align: center;
    }
    #array-container {
      display: flex;
      justify-content: center;
      align-items: flex-end;
      height: 300px;
      margin-bottom: 5px;
      gap: 5px;
    }
    .bar {
      width: 30px;
      background-color: steelblue;
      color: white;
      display: flex;
      align-items: flex-end;
      justify-content: center;
      font-size: 12px;
      transition: background-color 0.3s ease;
      user-select: none;
      border-radius: 3px;
    }
    .pivot {
      background-color: darkorange !important;
    }
    .left-boundary {
      border-bottom: 3px solid limegreen;
    }
    .right-boundary {
      border-bottom: 3px solid crimson;
    }
    .current-compare {
      background-color: #ff6666 !important;
    }
    .partition-index {
      background-color: #3399ff !important;
    }
    #index-labels, #info-labels {
      display: flex;
      justify-content: center;
      gap: 5px;
      margin-bottom: 8px;
      user-select: none;
    }
    #index-labels span, #info-labels span {
      width: 30px;
      text-align: center;
      font-size: 12px;
      color: #333;
    }
    #log {
      background-color: black;
      color: limegreen;
      padding: 10px;
      font-family: monospace;
      text-align: left;
      max-height: 250px;
      overflow-y: auto;
      white-space: pre-wrap;
      margin-bottom: 20px;
      border-radius: 4px;
    }
    input[type=text], input[type=number] {
      padding: 5px;
      font-size: 14px;
      width: 320px;
      max-width: 100%;
      margin-bottom: 10px;
    }
    button {
      padding: 8px 16px;
      font-size: 14px;
      margin: 0 5px 15px;
      cursor: pointer;
    }
    footer {
      margin-top: 40px;
    }
    a {
      color: #0066cc;
      text-decoration: none;
      font-weight: bold;
    }
    a:hover {
      text-decoration: underline;
    }
  </style>
</head>
<body>
  <h2>🔍 T192 快速排序算法可视化</h2>
  <div>
    <label>请输入数组（用逗号分隔）：</label><br />
    <input id="arrayInput" type="text" value="9,8,7,6,5,4,3,2,1" />
  </div>
  <div>
    <label>动画时间间隔（毫秒）：</label>
    <input id="delayInput" type="number" value="1000" min="100" max="5000" />
  </div>
  <div>
    <button onclick="startSort()">开始排序</button>
    <button onclick="resetArray()">重置数组</button>
  </div>

  <div id="array-container"></div>
  <div id="index-labels"></div>
  <div id="info-labels"></div>

  <h3>📜 日志输出</h3>
  <div id="log"></div>

  <footer>
    <a href="index.html">🔙 返回首页</a>
  </footer>

  <script>
    const container = document.getElementById("array-container");
    const indexLabels = document.getElementById("index-labels");
    const infoLabels = document.getElementById("info-labels");
    const logEl = document.getElementById("log");
    const arrayInput = document.getElementById("arrayInput");
    const delayInput = document.getElementById("delayInput");

    let nums = [];
    let delay = 1000;
    let sorting = false;

    // 延迟工具函数
    function sleep(ms) {
      return new Promise((resolve) => setTimeout(resolve, ms));
    }

    // 渲染数组条形图
    function renderArray(arr, highlight = {}) {
      container.innerHTML = "";
      indexLabels.innerHTML = "";
      infoLabels.innerHTML = "";

      if (arr.length === 0) return;

      const maxVal = Math.max(...arr);

      arr.forEach((val, idx) => {
        const bar = document.createElement("div");
        bar.className = "bar";
        bar.style.height = ((val / maxVal) * 100).toFixed(2) + "%";
        bar.textContent = val;

        if (highlight.pivot === idx) bar.classList.add("pivot");
        if (highlight.left === idx) bar.classList.add("left-boundary");
        if (highlight.right === idx) bar.classList.add("right-boundary");
        if (highlight.current === idx) bar.classList.add("current-compare");
        if (highlight.partition === idx) bar.classList.add("partition-index");

        container.appendChild(bar);

        // 下标
        const idxSpan = document.createElement("span");
        idxSpan.textContent = idx;
        indexLabels.appendChild(idxSpan);

        // 辅助信息：显示当前 left, right, pivot，空白则不显示
        const infoSpan = document.createElement("span");
        let label = "";
        if (highlight.left === idx) label = "L";
        else if (highlight.right === idx) label = "R";
        else if (highlight.pivot === idx) label = "P";
        else if (highlight.partition === idx) label = "X";
        infoSpan.textContent = label;
        infoLabels.appendChild(infoSpan);
      });
    }

    // 日志打印
    function log(msg) {
      logEl.textContent += msg + "\n";
      logEl.scrollTop = logEl.scrollHeight;
    }

    // 交换数组元素
    function swap(arr, i, j) {
      if (i !== j) {
        const tmp = arr[i];
        arr[i] = arr[j];
        arr[j] = tmp;
      }
    }

    // partition 函数，返回分割点索引，配合动画
    async function partition(arr, left, right) {
      const pivotVal = arr[right];
      let px = left;

      log(`partition 开始，left=${left}, right=${right}, pivotVal=arr[${right}]=${pivotVal}`);
      renderArray(arr, { left, right, pivot: right, partition: px });
      await sleep(delay);

      for (let i = left; i < right; i++) {
        renderArray(arr, { left, right, pivot: right, current: i, partition: px });
        log(`比较 arr[${i}]=${arr[i]} 和 pivotVal=${pivotVal}`);
        await sleep(delay);

        if (arr[i] < pivotVal) {
          log(`arr[${i}] < pivotVal，交换 arr[${i}] 和 arr[${px}]`);
          swap(arr, px, i);
          px++;
          renderArray(arr, { left, right, pivot: right, partition: px });
          await sleep(delay);
        }
      }

      log(`循环结束，交换 pivot 和 arr[${px}]`);
      swap(arr, px, right);
      renderArray(arr, { left, right, pivot: px, partition: px });
      await sleep(delay);

      log(`partition 返回分割点 index=${px}\n`);
      return px;
    }

    // 快速排序递归函数，动画异步实现
    async function quickSort(arr, left, right) {
      if (left >= right) {
        if (left === right) {
          log(`单元素区间 left=right=${left}, 无需排序`);
          renderArray(arr, { left, right });
          await sleep(delay);
        }
        return;
      }

      log(`quickSort 递归调用：left=${left}, right=${right}`);
      renderArray(arr, { left, right });
      await sleep(delay);

      const partIx = await partition(arr, left, right);

      await quickSort(arr, left, partIx - 1);
      await quickSort(arr, partIx + 1, right);
    }

    // 主入口，启动排序
    async function startSort() {
      if (sorting) return;
      sorting = true;
      logEl.textContent = "";

      // 解析输入数组
      const inputStr = arrayInput.value.trim();
      nums = inputStr.split(",").map(s => parseInt(s.trim())).filter(n => !isNaN(n));
      if (nums.length === 0) {
        alert("请输入有效的数组！");
        sorting = false;
        return;
      }

      delay = parseInt(delayInput.value);
      if (isNaN(delay) || delay < 100) delay = 1000;

      renderArray(nums);
      log("开始快速排序...\n");
      await quickSort(nums, 0, nums.length - 1);
      log("\n排序完成！");

      sorting = false;
    }

    // 重置数组显示为输入框内容
    function resetArray() {
      if (sorting) return;
      const inputStr = arrayInput.value.trim();
      nums = inputStr.split(",").map(s => parseInt(s.trim())).filter(n => !isNaN(n));
      renderArray(nums);
      logEl.textContent = "";
    }

    // 页面加载时渲染默认数组
    window.onload = () => {
      resetArray();
    };
  </script>
</body>
</html>