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<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>归并排序可视化 | Merge Sort Pro</title>
<link href="https://cdn.jsdelivr.net/npm/tailwindcss@2.2.19/dist/tailwind.min.css" rel="stylesheet">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0/css/all.min.css">
<style>
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;700&family=Inter:wght@300;400;500;600;700&display=swap');
:root {
--primary: #4f46e5;
--secondary: #8b5cf6;
--bg-gradient: linear-gradient(135deg, #f8fafc 0%, #e0e7ff 100%);
/* 归并排序特有变量 */
--block-size: 48px;
--level-height: 100px;
--gap-x: 12px;
}
body {
font-family: 'Inter', sans-serif;
background: var(--bg-gradient);
color: #334155;
min-height: 100vh;
overflow-x: hidden;
}
/* 玻璃拟态效果 */
.glass-card {
background: rgba(255, 255, 255, 0.9);
backdrop-filter: blur(12px);
border: 1px solid rgba(255, 255, 255, 0.8);
box-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.06);
transition: all 0.3s ease;
}
/* 归并排序舞台 */
.viz-stage {
position: relative;
width: 100%;
height: 520px; /* 足够容纳递归层级 */
overflow: hidden; /* 隐藏溢出，或者改为 visible 视情况而定 */
background-image: radial-gradient(#cbd5e1 1px, transparent 1px);
background-size: 24px 24px;
border-radius: 1rem;
transition: height 0.3s ease;
}
/* 数组方块元素 */
.array-item {
position: absolute;
width: var(--block-size);
height: var(--block-size);
display: flex;
align-items: center;
justify-content: center;
border-radius: 10px;
font-family: 'JetBrains Mono', monospace;
font-weight: 800;
font-size: 16px;
background-color: white;
border: 2px solid #cbd5e1;
color: #475569;
box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
transition: top 0.5s cubic-bezier(0.25, 1, 0.5, 1),
left 0.5s cubic-bezier(0.25, 1, 0.5, 1),
transform 0.3s, background-color 0.3s, border-color 0.3s, box-shadow 0.3s;
z-index: 10;
will-change: top, left;
}
/* 连线效果 (伪元素) */
.array-item::before {
content: '';
position: absolute;
top: -40px;
left: 50%;
width: 2px;
height: 40px;
background: #e2e8f0;
transform: translateX(-50%);
opacity: 0;
transition: opacity 0.3s;
z-index: -1;
}
.item-deep .array-item::before { opacity: 1; }
/* 状态颜色系统 */
.color-default { background-color: white; border-color: #cbd5e1; }
/* 左区间 L */
.color-left {
background-color: #eff6ff !important;
border-color: #3b82f6 !important;
color: #1d4ed8 !important;
}
/* 右区间 R */
.color-right {
background-color: #fdf4ff !important;
border-color: #d946ef !important;
color: #a21caf !important;
}
/* 比较中/高亮 */
.color-comparing {
transform: scale(1.15);
z-index: 50;
border-color: #f59e0b !important; /* Amber */
box-shadow: 0 10px 25px rgba(245, 158, 11, 0.3) !important;
}
/* 已归并/排序完成 */
.color-sorted {
background-color: #ecfdf5 !important;
border-color: #10b981 !important;
color: #047857 !important;
box-shadow: 0 4px 10px rgba(16, 185, 129, 0.2) !important;
}
/* 指针系统 (保留选择排序风格的Tag) */
.pointer-container {
position: absolute;
top: 0; left: 0; width: 100%; height: 100%;
pointer-events: none;
overflow: visible;
}
.pointer {
position: absolute;
transition: top 0.5s cubic-bezier(0.25, 1, 0.5, 1), left 0.5s cubic-bezier(0.25, 1, 0.5, 1);
display: flex;
flex-direction: column;
align-items: center;
z-index: 40;
width: 40px;
height: 50px;
}
.pointer-tag {
font-size: 10px;
font-weight: 800;
padding: 3px 6px;
border-radius: 4px;
color: white;
box-shadow: 0 2px 4px rgba(0,0,0,0.1);
margin-top: 2px;
text-transform: uppercase;
}
.pointer-arrow {
width: 0;
height: 0;
border-left: 5px solid transparent;
border-right: 5px solid transparent;
border-bottom: 6px solid; /* 向上箭头 */
}
/* L 指针 (Blue) */
.pointer-l .pointer-tag { background-color: #3b82f6; }
.pointer-l .pointer-arrow { border-bottom-color: #3b82f6; }
/* R 指针 (Fuchsia) */
.pointer-r .pointer-tag { background-color: #d946ef; }
.pointer-r .pointer-arrow { border-bottom-color: #d946ef; }
/* 终端日志 */
.log-container {
font-family: 'JetBrains Mono', monospace;
background: #f1f5f9;
border: 1px solid #e2e8f0;
border-left: 4px solid #4f46e5;
}
.log-entry { animation: fadeIn 0.3s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: 0; } }
/* 布局控制 */
.layout-default .main-grid { display: flex; flex-direction: column; gap: 1.5rem; }
.layout-sidebar .main-grid { display: grid; grid-template-columns: 1fr 350px; gap: 1.5rem; }
@media (max-width: 1024px) { .layout-sidebar .main-grid { grid-template-columns: 1fr; } }
/* 状态灯 */
.status-dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; margin-right: 6px; }
.dot-running { background: #10b981; animation: pulse 1.5s infinite; }
.dot-paused { background: #f59e0b; }
.dot-idle { background: #94a3b8; }
@keyframes pulse { 0% { opacity: 1; transform: scale(1); } 50% { opacity: 0.5; transform: scale(1.2); } 100% { opacity: 1; transform: scale(1); } }
/* 徽章 */
.badge { display: inline-flex; align-items: center; padding: 0.125rem 0.5rem; border-radius: 0.375rem; font-size: 0.75rem; font-weight: 600; }
.badge-worst { background-color: #fee2e2; color: #991b1b; }
.badge-stable { background-color: #d1fae5; color: #065f46; }
</style>
</head>
<body class="p-4 md:p-8">
<div class="max-w-7xl mx-auto">
<!-- Header -->
<header class="flex flex-col md:flex-row justify-between items-center mb-8 gap-4">
<div>
<div class="flex items-center gap-3 mb-1">
<div class="p-2 bg-indigo-600 rounded-xl text-white shadow-lg shadow-indigo-200 transform -rotate-3">
<i class="fas fa-layer-group fa-lg"></i>
</div>
<h1 class="text-3xl font-extrabold text-slate-800 tracking-tight">归并排序</h1>
</div>
<p class="text-slate-500 font-medium">Visualization of Merge Sort Algorithm</p>
</div>
<div class="flex gap-3">
<button id="layoutToggle" class="glass-card px-5 py-2.5 rounded-xl text-slate-700 font-semibold hover:bg-white transition flex items-center gap-2">
<i class="fas fa-columns text-indigo-500"></i> 视图切换
</button>
</div>
</header>
<div id="mainContent" class="layout-default">
<!-- Control Panel -->
<section class="glass-card rounded-2xl p-6 mb-6">
<div class="grid grid-cols-1 lg:grid-cols-4 gap-6 items-end">
<!-- Size Control -->
<div>
<div class="flex justify-between mb-2">
<label class="text-xs font-bold text-slate-500 uppercase">数组规模</label>
<span id="sizeValue" class="text-indigo-600 font-bold font-mono text-sm">8</span>
</div>
<input type="range" id="sizeSlider" min="4" max="16" value="8" class="w-full accent-indigo-600 cursor-pointer h-2 bg-slate-200 rounded-lg appearance-none">
</div>
<!-- Speed Control -->
<div>
<div class="flex justify-between mb-2">
<label class="text-xs font-bold text-slate-500 uppercase">动画速度</label>
<span id="speedValue" class="text-indigo-600 font-bold font-mono text-sm">3</span>
</div>
<input type="range" id="speedSlider" min="1" max="5" value="3" class="w-full accent-indigo-600 cursor-pointer h-2 bg-slate-200 rounded-lg appearance-none">
</div>
<!-- Custom Input -->
<div class="lg:col-span-1">
<label class="text-xs font-bold text-slate-500 uppercase block mb-2">自定义数据</label>
<input type="text" id="customArray" placeholder="例如: 8,3,5,4" class="w-full bg-slate-50 border border-slate-200 rounded-xl px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-indigo-500 transition shadow-sm font-mono">
</div>
<!-- Generate Button -->
<button id="generateBtn" class="bg-indigo-50 text-indigo-600 h-10 px-4 rounded-xl font-bold hover:bg-indigo-100 transition border border-indigo-100 flex items-center justify-center gap-2">
<i class="fas fa-sync-alt"></i> 生成数组
</button>
</div>
</section>
<div class="main-grid">
<!-- Left/Top Section: Visualization -->
<div class="space-y-6">
<section class="glass-card rounded-3xl p-6 relative flex flex-col">
<!-- Status Bar -->
<div class="flex justify-between items-center mb-4 pb-4 border-b border-slate-100 z-20">
<div class="flex items-center gap-4">
<span class="flex items-center text-sm font-bold text-slate-600 bg-white border border-slate-200 px-4 py-1.5 rounded-full shadow-sm">
<span id="statusIndicator" class="status-dot dot-idle"></span>
<span id="statusText">准备就绪</span>
</span>
</div>
<div class="flex items-center gap-2">
<span class="text-xs text-slate-400 font-bold uppercase">Comparisons</span>
<div id="compCount" class="font-mono text-xl font-bold text-indigo-600 bg-indigo-50 px-3 py-1 rounded-lg border border-indigo-100">
0
</div>
</div>
</div>
<!-- Visualization Container (Stage) -->
<div id="vizStage" class="viz-stage mb-6">
<!-- JS Generated Items -->
<div id="pointerLayer" class="pointer-container">
<!-- JS Generated Pointers -->
</div>
</div>
<!-- Controls -->
<div class="flex flex-wrap justify-center gap-3 z-20">
<button id="startBtn" class="group px-6 py-2.5 bg-indigo-600 text-white rounded-xl font-bold hover:bg-indigo-700 transition shadow-lg shadow-indigo-200 active:scale-95 flex items-center gap-2">
<i class="fas fa-play"></i> 开始归并
</button>
<button id="pauseBtn" disabled class="px-6 py-2.5 bg-white border border-slate-200 text-slate-700 rounded-xl font-bold hover:bg-slate-50 transition disabled:opacity-50 disabled:cursor-not-allowed flex items-center gap-2">
<i class="fas fa-pause"></i> 暂停
</button>
<button id="stepBtn" disabled class="px-6 py-2.5 bg-white border border-slate-200 text-indigo-600 rounded-xl font-bold hover:bg-indigo-50 transition disabled:opacity-50 active:scale-95 flex items-center gap-2">
<i class="fas fa-step-forward"></i> 单步
</button>
<button id="resetBtn" class="px-6 py-2.5 bg-rose-50 border border-rose-100 text-rose-600 rounded-xl font-bold hover:bg-rose-100 transition active:scale-95 flex items-center gap-2">
<i class="fas fa-undo"></i> 重置
</button>
</div>
</section>
<!-- Terminal Log -->
<section class="log-container rounded-2xl p-4">
<div class="flex items-center justify-between mb-3 border-b border-slate-200 pb-2">
<div class="flex items-center gap-2 text-slate-700 text-xs font-bold uppercase tracking-widest">
<i class="fas fa-terminal text-indigo-500"></i> 执行日志
</div>
<button onclick="clearLog()" class="text-slate-400 hover:text-slate-600 text-xs"><i class="fas fa-trash"></i></button>
</div>
<div id="terminalLog" class="h-32 overflow-y-auto space-y-1.5 text-sm scrollbar-hide px-1">
<div class="text-slate-500 flex items-start gap-2">
<span class="text-indigo-400 font-bold">></span>
<span>等待系统指令...</span>
</div>
</div>
</section>
</div>
<!-- Right/Bottom Section: Algorithm Info -->
<aside id="infoSection" class="glass-card rounded-2xl p-6 border-t-4 border-indigo-500 h-full">
<div id="introContent">
<h3 class="text-lg font-bold text-slate-800 mb-6 flex items-center gap-2 pb-4 border-b border-slate-100">
<i class="fas fa-book-open text-indigo-500"></i> 算法详解
</h3>
<!-- Legend -->
<div class="mb-6 bg-slate-50 p-4 rounded-xl border border-slate-100">
<h4 class="text-xs font-bold text-slate-500 uppercase mb-3">图例说明</h4>
<div class="grid grid-cols-2 gap-3 text-xs font-medium text-slate-600">
<div class="flex items-center gap-2"><div class="w-3 h-3 rounded bg-blue-100 border border-blue-500"></div>左区间 (L)</div>
<div class="flex items-center gap-2"><div class="w-3 h-3 rounded bg-fuchsia-100 border border-fuchsia-500"></div>右区间 (R)</div>
<div class="flex items-center gap-2"><div class="w-3 h-3 rounded bg-white border border-amber-500 shadow-sm"></div>比较中</div>
<div class="flex items-center gap-2"><div class="w-3 h-3 rounded bg-emerald-100 border border-emerald-500"></div>已归并</div>
</div>
<div class="mt-3 pt-3 border-t border-slate-200 flex gap-4 text-xs">
<div class="flex items-center gap-1"><span class="bg-blue-500 text-white px-1.5 rounded">L</span> 左指针</div>
<div class="flex items-center gap-1"><span class="bg-fuchsia-500 text-white px-1.5 rounded">R</span> 右指针</div>
</div>
</div>
<!-- Algorithm Details -->
<div class="space-y-6 text-slate-600 text-sm">
<div>
<h4 class="font-bold text-slate-800 mb-2">💡 核心思想</h4>
<p class="leading-relaxed">分治法 (Divide and Conquer)。将数组不断二分直到只剩一个元素，然后两两合并(Merge)有序序列，最终得到有序数组。</p>
</div>
<div>
<h4 class="font-bold text-slate-800 mb-2">📊 复杂度分析</h4>
<div class="flex flex-wrap gap-2 mb-2">
<span class="badge badge-worst">时间: O(n log n)</span>
<span class="badge badge-worst">空间: O(n)</span>
</div>
<p class="text-xs text-slate-500">效率非常稳定，但需要额外的 O(n) 空间。</p>
</div>
<div>
<h4 class="font-bold text-slate-800 mb-2">⚖️ 稳定性</h4>
<span class="badge badge-stable mb-1">稳定</span>
<p class="text-xs text-slate-500 mt-1">相同值的元素在排序后相对位置不变。</p>
</div>
</div>
</div>
</aside>
</div>
</div>
<!-- Footer -->
<footer class="mt-8 text-center text-slate-400 text-xs pb-4">
<p>Designed with Tailwind CSS & Glassmorphism</p>
</footer>
</div>
<script>
// --- 全局配置与状态 ---
const config = {
blockSize: 48,
gapX: 12,
levelHeight: 100,
baseTop: 60,
speeds: [2000, 1200, 800, 400, 150]
};
let state = {
visualItems: [], // 存储 {id, value, el, currentIdx, depth}
arraySize: 8,
speed: 800,
isSorting: false,
isPaused: false,
isComplete: false,
stopFlag: false,
stepResolver: null,
comparisons: 0,
savedInitialData: [],
currentPointers: { l: null, r: null }
};
// --- DOM 元素 ---
const els = {
sizeSlider: document.getElementById('sizeSlider'),
sizeValue: document.getElementById('sizeValue'),
speedSlider: document.getElementById('speedSlider'),
speedValue: document.getElementById('speedValue'),
customInput: document.getElementById('customArray'),
genBtn: document.getElementById('generateBtn'),
startBtn: document.getElementById('startBtn'),
pauseBtn: document.getElementById('pauseBtn'),
stepBtn: document.getElementById('stepBtn'),
resetBtn: document.getElementById('resetBtn'),
stage: document.getElementById('vizStage'),
pointerLayer: document.getElementById('pointerLayer'),
log: document.getElementById('terminalLog'),
statusText: document.getElementById('statusText'),
statusDot: document.getElementById('statusIndicator'),
compCount: document.getElementById('compCount'),
layoutToggle: document.getElementById('layoutToggle'),
mainContent: document.getElementById('mainContent')
};
// --- 初始化 ---
document.addEventListener('DOMContentLoaded', () => {
initEventListeners();
generateArray(true);
setupResizeObserver();
});
function initEventListeners() {
// 布局切换
els.layoutToggle.addEventListener('click', toggleLayout);
// 滑块控制
els.sizeSlider.addEventListener('input', e => {
els.sizeValue.textContent = e.target.value;
state.arraySize = parseInt(e.target.value);
if (!state.isSorting) generateArray(true);
});
els.speedSlider.addEventListener('input', e => {
els.speedValue.textContent = e.target.value;
state.speed = config.speeds[e.target.value - 1];
});
// 按钮控制
els.genBtn.addEventListener('click', () => {
const val = els.customInput.value.trim();
if(val) {
const arr = val.split(/[,， ]+/).map(Number).filter(n => !isNaN(n));
if(arr.length > 1 && arr.length <= 16) {
state.arraySize = arr.length;
els.sizeSlider.value = arr.length;
els.sizeValue.textContent = arr.length;
createVisualItems(arr);
state.savedInitialData = [...arr];
resetState();
} else {
alert('请输入2-16个数字，用逗号分隔');
}
} else {
generateArray(true);
}
});
els.startBtn.addEventListener('click', () => {
if (state.isPaused && state.isSorting) togglePause();
else startSort();
});
els.pauseBtn.addEventListener('click', togglePause);
els.stepBtn.addEventListener('click', stepExec);
els.resetBtn.addEventListener('click', () => hardReset(false));
}
// --- 视图与布局 ---
function toggleLayout() {
const isDefault = els.mainContent.classList.contains('layout-default');
if (isDefault) {
els.mainContent.classList.remove('layout-default');
els.mainContent.classList.add('layout-sidebar');
els.layoutToggle.innerHTML = '<i class="fas fa-arrow-up text-indigo-500"></i> 默认视图';
} else {
els.mainContent.classList.remove('layout-sidebar');
els.mainContent.classList.add('layout-default');
els.layoutToggle.innerHTML = '<i class="fas fa-columns text-indigo-500"></i> 侧边视图';
}
setTimeout(recalculatePositions, 300);
}
function setupResizeObserver() {
new ResizeObserver(() => {
if (state.visualItems.length > 0) requestAnimationFrame(recalculatePositions);
}).observe(els.stage);
}
function recalculatePositions() {
state.visualItems.forEach(item => {
const coords = getCoordinates(item.currentIdx, item.depth);
item.el.style.left = `${coords.left}px`;
item.el.style.top = `${coords.top}px`;
});
// 重新定位指针
if (state.currentPointers.l && state.currentPointers.r) {
showPointers(state.currentPointers.l, state.currentPointers.r, false);
}
}
function getCoordinates(index, depth) {
const totalItems = state.visualItems.length;
const stageWidth = els.stage.clientWidth || 800;
const contentWidth = totalItems * (config.blockSize + config.gapX) - config.gapX;
// 居中计算
const startX = Math.max(20, (stageWidth - contentWidth) / 2);
return {
left: startX + index * (config.blockSize + config.gapX),
top: config.baseTop + depth * config.levelHeight
};
}
// --- 数据生成与渲染 ---
function generateArray(isNew = true) {
if (isNew) {
const arr = Array.from({length: state.arraySize}, () => Math.floor(Math.random() * 90) + 10);
state.savedInitialData = [...arr];
createVisualItems(arr);
} else {
createVisualItems(state.savedInitialData);
}
resetState();
}
function createVisualItems(arr) {
// 清理
const items = els.stage.querySelectorAll('.array-item');
items.forEach(el => el.remove());
els.pointerLayer.innerHTML = '';
state.visualItems = [];
state.currentPointers = { l: null, r: null };
arr.forEach((val, idx) => {
const el = document.createElement('div');
el.className = 'array-item color-default';
el.textContent = val;
els.stage.appendChild(el);
state.visualItems.push({
id: idx,
value: val,
el: el,
currentIdx: idx,
depth: 0
});
});
recalculatePositions();
}
function resetState() {
state.isSorting = false;
state.isPaused = false;
state.isComplete = false;
state.stopFlag = false;
state.stepResolver = null;
state.comparisons = 0;
els.compCount.textContent = '0';
updateStatus('准备就绪', 'idle');
els.log.innerHTML = '<div class="text-slate-500 flex items-start gap-2"><span class="text-indigo-400 font-bold">></span><span>系统重置就绪</span></div>';
els.startBtn.disabled = false;
els.startBtn.innerHTML = '<i class="fas fa-play"></i> 开始归并';
els.pauseBtn.disabled = true;
els.stepBtn.disabled = true;
els.pointerLayer.innerHTML = '';
}
// --- 核心逻辑 ---
async function startSort() {
if (state.isSorting) return;
if (state.isComplete) generateArray(false);
state.isSorting = true;
state.stopFlag = false;
updateStatus('归并中', 'running');
els.startBtn.disabled = true;
els.pauseBtn.disabled = false;
els.stepBtn.disabled = false;
els.resetBtn.disabled = false;
log('🚀 归并排序开始');
try {
await mergeSort(0, state.visualItems.length - 1, 1);
finishSort();
} catch (e) {
if (e.message !== 'ABORT') console.error(e);
updateStatus('已停止', 'paused');
}
}
async function mergeSort(l, r, depth) {
if (l >= r || state.stopFlag) return;
const m = Math.floor((l + r) / 2);
// 拆分过程：下沉
log(`🔽 拆分区间 [${l}, ${r}] 到深度 ${depth}`);
for (let i = l; i <= r; i++) {
moveItem(state.visualItems[i], i, depth);
}
// 染色表示左右分支
setRangeColor(l, m, 'color-left');
setRangeColor(m + 1, r, 'color-right');
await waitStep();
await mergeSort(l, m, depth + 1);
await mergeSort(m + 1, r, depth + 1);
// 合并过程
await merge(l, m, r, depth - 1);
}
async function merge(l, m, r, targetDepth) {
if (state.stopFlag) throw new Error('ABORT');
log(`🔄 合并区间: [${l}-${m}] 和 [${m+1}-${r}]`);
const temp = [];
let i = l, j = m + 1;
// 创建快照以便在动画移动时引用正确的对象
const currentSnapshot = [...state.visualItems];
while (i <= m && j <= r) {
if (state.stopFlag) throw new Error('ABORT');
state.comparisons++;
els.compCount.textContent = state.comparisons;
const itemL = currentSnapshot[i];
const itemR = currentSnapshot[j];
// 显示指针和高亮
showPointers(itemL, itemR);
itemL.el.classList.add('color-comparing');
itemR.el.classList.add('color-comparing');
await waitStep();
let winner;
if (itemL.value <= itemR.value) {
log(` 👈 左边小: ${itemL.value} <= ${itemR.value}`);
winner = itemL;
i++;
} else {
log(` 👉 右边小: ${itemR.value} < ${itemL.value}`);
winner = itemR;
j++;
}
// 移除高亮，设置为有序色
itemL.el.classList.remove('color-comparing');
itemR.el.classList.remove('color-comparing');
winner.el.className = 'array-item color-sorted';
// 移动到上一层的新位置
const targetIdx = l + temp.length;
moveItem(winner, targetIdx, targetDepth);
temp.push(winner);
await waitStep(0.6); // 稍微快一点移动
}
// 处理剩余元素
const processRemaining = async (idx) => {
if(state.stopFlag) throw new Error('ABORT');
const item = currentSnapshot[idx];
item.el.className = 'array-item color-sorted';
moveItem(item, l + temp.length, targetDepth);
temp.push(item);
await waitStep(0.3);
};
while (i <= m) await processRemaining(i++);
while (j <= r) await processRemaining(j++);
removePointers();
// 更新主数组状态，确保后续逻辑引用的索引正确
for(let k=0; k<temp.length; k++) {
state.visualItems[l + k] = temp[k];
}
// 恢复该层级颜色（如果不是最顶层）
if (targetDepth > 0) {
// 可选：稍微停留展示合并结果
await waitStep(0.5);
}
}
// --- 辅助功能 ---
function moveItem(item, targetIndex, targetDepth) {
const coords = getCoordinates(targetIndex, targetDepth);
item.el.style.left = `${coords.left}px`;
item.el.style.top = `${coords.top}px`;
item.currentIdx = targetIndex;
item.depth = targetDepth;
if(targetDepth > 0) item.el.parentElement.classList.add('item-deep');
else item.el.parentElement.classList.remove('item-deep');
}
function setRangeColor(start, end, className) {
for(let i = start; i <= end; i++) {
if(state.visualItems[i]) {
// 清除之前的颜色类，保留基础类
state.visualItems[i].el.className = `array-item ${className}`;
}
}
}
// 指针管理
function showPointers(itemL, itemR) {
state.currentPointers = { l: itemL, r: itemR };
els.pointerLayer.innerHTML = '';
const createPtr = (type, item) => {
const ptr = document.createElement('div');
ptr.className = `pointer pointer-${type}`;
ptr.innerHTML = `<div class="pointer-arrow"></div><div class="pointer-tag">${type.toUpperCase()}</div>`;
const coords = getCoordinates(item.currentIdx, item.depth);
// 指针显示在方块下方
ptr.style.left = `${coords.left + config.blockSize/2 - 20}px`;
ptr.style.top = `${coords.top + config.blockSize + 5}px`;
return ptr;
};
els.pointerLayer.appendChild(createPtr('l', itemL));
els.pointerLayer.appendChild(createPtr('r', itemR));
}
function removePointers() {
els.pointerLayer.innerHTML = '';
state.currentPointers = { l: null, r: null };
}
// 流程控制
async function waitStep(ratio = 1) {
if (state.stopFlag) throw new Error('ABORT');
if (state.isPaused) {
return new Promise(resolve => { state.stepResolver = resolve; });
}
return new Promise(resolve => setTimeout(resolve, state.speed * ratio));
}
function togglePause() {
if (!state.isSorting) return;
state.isPaused = !state.isPaused;
if (state.isPaused) {
els.pauseBtn.innerHTML = '<i class="fas fa-play"></i> 继续';
updateStatus('已暂停', 'paused');
log('⏸️ 流程暂停');
} else {
els.pauseBtn.innerHTML = '<i class="fas fa-pause"></i> 暂停';
updateStatus('归并中', 'running');
log('▶️ 流程继续');
if (state.stepResolver) {
state.stepResolver();
state.stepResolver = null;
}
}
}
function stepExec() {
if (!state.isSorting) {
state.isPaused = true;
startSort();
updateStatus('单步模式', 'paused');
els.pauseBtn.innerHTML = '<i class="fas fa-play"></i> 继续';
} else if (state.isPaused && state.stepResolver) {
state.stepResolver();
state.stepResolver = null;
}
}
function hardReset(newArray = false) {
state.stopFlag = true;
if (state.stepResolver) state.stepResolver();
setTimeout(() => {
generateArray(newArray);
}, 100);
}
function finishSort() {
state.isSorting = false;
state.isComplete = true;
updateStatus('已完成', 'running');
removePointers();
// 最终动画
state.visualItems.forEach(item => {
item.el.className = 'array-item color-sorted';
item.el.style.transform = 'scale(1.1)';
setTimeout(() => item.el.style.transform = 'scale(1)', 300);
});
els.startBtn.disabled = false;
els.startBtn.innerHTML = '<i class="fas fa-redo"></i> 重新开始';
els.pauseBtn.disabled = true;
els.stepBtn.disabled = true;
log(`🏆 排序完成！共比较 ${state.comparisons} 次`);
}
// 工具函数
function updateStatus(text, type) {
els.statusText.textContent = text;
els.statusDot.className = `status-dot dot-${type}`;
}
function log(msg) {
const div = document.createElement('div');
div.className = 'log-entry text-slate-600 flex items-start gap-2 border-l-2 border-indigo-100 pl-2 py-1';
const time = new Date().toLocaleTimeString('zh-CN', { hour12: false });
div.innerHTML = `<span class="text-xs text-indigo-400 font-mono mt-0.5">[${time}]</span> <span class="flex-1">${msg}</span>`;
els.log.appendChild(div);
els.log.scrollTop = els.log.scrollHeight;
}
function clearLog() {
els.log.innerHTML = '';
}
</script>
</body>
</html>