404 lines
8.5 KiB
Vue
404 lines
8.5 KiB
Vue
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<template>
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<div class="demo-container">
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<h4>浏览器渲染管线全景图</h4>
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<p class="demo-description">点击每个阶段查看详情，观察数据如何在管线中流动</p>
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<div class="pipeline-container">
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<div class="pipeline-flow">
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<div
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v-for="(stage, index) in stages"
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:key="stage.id"
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class="stage-card"
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:class="{
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active: activeStage === index,
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completed: activeStage > index,
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pending: activeStage < index
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}"
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@click="selectStage(index)"
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>
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<div class="stage-icon">{{ stage.icon }}</div>
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<div class="stage-name">{{ stage.name }}</div>
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<div class="stage-time">{{ stage.time }}</div>
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</div>
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<div class="flow-arrows">
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<div v-for="i in stages.length - 1" :key="i" class="flow-arrow">
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<span class="arrow-line"></span>
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<span class="arrow-head">▶</span>
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</div>
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</div>
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</div>
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<div class="stage-detail" v-if="activeStage >= 0">
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<div class="detail-header">
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<span class="detail-icon">{{ stages[activeStage].icon }}</span>
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<span class="detail-title">{{ stages[activeStage].name }}</span>
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</div>
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<div class="detail-content">
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<p>{{ stages[activeStage].description }}</p>
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<div class="detail-meta">
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<div class="meta-item">
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<span class="meta-label">输入:</span>
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<span class="meta-value">{{ stages[activeStage].input }}</span>
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</div>
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<div class="meta-item">
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<span class="meta-label">输出:</span>
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<span class="meta-value">{{ stages[activeStage].output }}</span>
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</div>
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<div class="meta-item">
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<span class="meta-label">耗时:</span>
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<span class="meta-value">{{ stages[activeStage].time }}</span>
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</div>
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</div>
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</div>
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</div>
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</div>
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<div class="simulation-controls">
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<el-button type="primary" @click="startSimulation" :disabled="isSimulating">
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{{ isSimulating ? '模拟中...' : '开始模拟' }}
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</el-button>
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<el-button @click="resetSimulation">重置</el-button>
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<el-slider v-model="simulationSpeed" :min="1" :max="5" :step="1" style="width: 150px;" />
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</div>
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<div class="pipeline-stats" v-if="showStats">
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<div class="stat-card">
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<div class="stat-value">{{ totalTime }}ms</div>
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<div class="stat-label">总耗时</div>
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</div>
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<div class="stat-card">
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<div class="stat-value">{{ bottleneckStage }}</div>
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<div class="stat-label">瓶颈阶段</div>
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</div>
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<div class="stat-card">
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<div class="stat-value">{{ optimizationTip }}</div>
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<div class="stat-label">优化建议</div>
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</div>
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</div>
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</div>
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</template>
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<script setup>
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import { ref, computed } from 'vue'
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const stages = [
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{
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id: 'html',
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icon: '📄',
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name: 'HTML解析',
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time: '15ms',
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description: '浏览器接收HTML字节流，进行词法分析和语法分析，构建DOM树。这是渲染管线的起点。',
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input: 'HTML字节流',
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output: 'DOM树'
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},
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{
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id: 'css',
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icon: '🎨',
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name: 'CSS解析',
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time: '12ms',
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description: '解析CSS样式表，处理选择器优先级，构建CSSOM树。CSSOM与DOM是并行构建的。',
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input: 'CSS字节流',
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output: 'CSSOM树'
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},
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{
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id: 'render',
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icon: '🌳',
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name: '构建渲染树',
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time: '8ms',
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description: '将DOM树和CSSOM树合并，生成渲染树。只包含可见节点，并计算每个节点的样式。',
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input: 'DOM + CSSOM',
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output: '渲染树'
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},
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{
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id: 'layout',
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icon: '📐',
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name: '布局 (Reflow)',
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time: '25ms',
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description: '计算每个节点在视口中的精确位置和大小。这是最耗时的阶段之一，牵一发而动全身。',
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input: '渲染树',
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output: '几何信息'
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},
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{
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id: 'paint',
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icon: '✏️',
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name: '绘制 (Paint)',
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time: '18ms',
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description: '将每个节点转换为屏幕上的实际像素。包括文本、颜色、图像、边框等视觉内容。',
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input: '几何信息',
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output: '绘制记录'
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},
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{
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id: 'composite',
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icon: '🔮',
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name: '合成 (Composite)',
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time: '5ms',
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description: '将多个图层按照正确的层级顺序合并为最终图像。利用GPU加速，是现代浏览器的优化重点。',
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input: '绘制记录',
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output: '屏幕像素'
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}
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]
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const activeStage = ref(0)
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const isSimulating = ref(false)
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const simulationSpeed = ref(3)
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const showStats = ref(false)
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const totalTime = computed(() => {
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return stages.reduce((sum, stage) => sum + parseInt(stage.time), 0)
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})
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const bottleneckStage = computed(() => '布局阶段')
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const optimizationTip = computed(() => '减少DOM操作')
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function selectStage(index) {
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activeStage.value = index
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}
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function startSimulation() {
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isSimulating.value = true
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showStats.value = true
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activeStage.value = 0
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const interval = setInterval(() => {
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if (activeStage.value < stages.length - 1) {
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activeStage.value++
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} else {
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clearInterval(interval)
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isSimulating.value = false
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}
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}, (6 - simulationSpeed.value) * 800)
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}
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function resetSimulation() {
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isSimulating.value = false
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activeStage.value = 0
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showStats.value = false
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}
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</script>
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<style scoped>
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.demo-container {
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padding: 20px;
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background: #f5f7fa;
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border-radius: 8px;
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}
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h4 {
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margin: 0 0 8px 0;
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color: #303133;
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}
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.demo-description {
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color: #606266;
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font-size: 14px;
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margin-bottom: 20px;
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}
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.pipeline-container {
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background: white;
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border-radius: 8px;
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padding: 20px;
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margin-bottom: 20px;
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}
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.pipeline-flow {
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display: flex;
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justify-content: space-between;
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align-items: center;
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position: relative;
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margin-bottom: 20px;
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overflow-x: auto;
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padding-bottom: 10px;
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}
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.stage-card {
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flex-shrink: 0;
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width: 100px;
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padding: 12px 8px;
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border: 2px solid #e4e7ed;
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border-radius: 8px;
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text-align: center;
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cursor: pointer;
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transition: all 0.3s;
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background: white;
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position: relative;
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z-index: 1;
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}
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.stage-card:hover {
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border-color: #409eff;
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transform: translateY(-2px);
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box-shadow: 0 4px 12px rgba(64, 158, 255, 0.2);
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}
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.stage-card.active {
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border-color: #409eff;
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background: #ecf5ff;
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box-shadow: 0 0 0 3px rgba(64, 158, 255, 0.2);
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}
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.stage-card.completed {
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border-color: #67c23a;
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background: #f0f9eb;
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}
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.stage-icon {
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font-size: 24px;
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margin-bottom: 4px;
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}
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.stage-name {
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font-size: 12px;
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font-weight: 500;
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color: #303133;
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margin-bottom: 2px;
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}
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.stage-time {
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font-size: 11px;
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color: #909399;
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}
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.flow-arrows {
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position: absolute;
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top: 50%;
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left: 50px;
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right: 50px;
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height: 2px;
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display: flex;
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justify-content: space-around;
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align-items: center;
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pointer-events: none;
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z-index: 0;
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}
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.flow-arrow {
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display: flex;
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align-items: center;
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color: #c0c4cc;
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font-size: 12px;
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}
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.arrow-line {
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width: 30px;
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height: 2px;
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background: #dcdfe6;
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}
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.arrow-head {
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margin-left: -5px;
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}
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.stage-detail {
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background: #f5f7fa;
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border-radius: 8px;
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padding: 16px;
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}
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.detail-header {
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display: flex;
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align-items: center;
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gap: 8px;
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margin-bottom: 12px;
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}
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.detail-icon {
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font-size: 20px;
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}
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.detail-title {
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font-size: 16px;
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font-weight: 600;
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color: #303133;
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}
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.detail-content {
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color: #606266;
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font-size: 14px;
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line-height: 1.6;
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}
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.detail-content p {
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margin: 0 0 12px 0;
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}
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.detail-meta {
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display: flex;
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flex-wrap: wrap;
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gap: 16px;
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margin-top: 12px;
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padding-top: 12px;
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border-top: 1px solid #e4e7ed;
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}
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.meta-item {
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display: flex;
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gap: 6px;
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font-size: 13px;
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}
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.meta-label {
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color: #909399;
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}
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.meta-value {
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color: #409eff;
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font-weight: 500;
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}
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.simulation-controls {
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display: flex;
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align-items: center;
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gap: 12px;
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margin-bottom: 20px;
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flex-wrap: wrap;
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}
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.pipeline-stats {
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display: grid;
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grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
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gap: 16px;
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}
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.stat-card {
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background: white;
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border-radius: 8px;
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padding: 16px;
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text-align: center;
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}
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.stat-value {
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font-size: 20px;
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font-weight: 600;
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color: #409eff;
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margin-bottom: 4px;
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}
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.stat-label {
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font-size: 12px;
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color: #909399;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
@media (max-width: 768px) {
|
|||
|
|
.pipeline-flow {
|
|||
|
|
flex-direction: column;
|
|||
|
|
gap: 12px;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
.flow-arrows {
|
|||
|
|
display: none;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
.stage-card {
|
|||
|
|
width: 100%;
|
|||
|
|
max-width: 200px;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
.detail-meta {
|
|||
|
|
flex-direction: column;
|
|||
|
|
gap: 8px;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
</style>
|