support 字幕

css/style.css

@@ -172,6 +172,33 @@
     box-shadow: 0 0 3px rgba(74, 107, 223, 0.3);
 }
 
+.subtitle-container {
+    width: 100%;
+    padding: 10px 15px;
+    margin: 10px 0 15px 0;
+    background-color: rgba(0, 0, 0, 0.7);
+    color: white;
+    border-radius: 5px;
+    text-align: center;
+    font-size: 18px;
+    min-height: 50px;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    transition: all 0.3s ease;
+}
+
+.subtitle-container p {
+    margin: 0;
+    padding: 0;
+    font-weight: 400;
+    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
+}
+
+.subtitle-container.active {
+    background-color: rgba(74, 107, 223, 0.8);
+    box-shadow: 0 0 10px rgba(74, 107, 223, 0.5);
+}
 
 @keyframes pulse {
     0% {
@@ -205,10 +232,4 @@
     animation: pulse 2s infinite, textPulse 2s infinite;
     transform-origin: center;
     display: inline-block;
-} 
-
-
-
-
-
-
+}

index.html

@@ -45,6 +45,9 @@
                     </div>
                 </div>
                 <canvas id="pdf-canvas"></canvas>
+                <div id="subtitle-container" class="subtitle-container">
+                    <p id="subtitle-text">字幕将在播放讲解时显示在这里</p>
+                </div>
                 <div id="live2d-container" class="live2d-container"></div>
             </div>
             

js/ai-teacher-app.js

@@ -387,11 +387,18 @@ export class AITeacherApp {
         const indices = segment.indices || [];
         
         // 高亮当前段中的所有句子
+        let currentText = '';
         indices.forEach(index => {
             const sentenceElement = document.getElementById(`sentence-${index}`);
             if (sentenceElement) {
                 sentenceElement.classList.add('highlight');
                 
+                // 收集当前正在播放的句子文本
+                if (currentText) {
+                    currentText += ' ';
+                }
+                currentText += this.sentences[index];
+                
                 // 滚动到可见区域，但只在句子不在可见区域时执行
                 const container = document.getElementById('explanation-text');
                 const elementRect = sentenceElement.getBoundingClientRect();
@@ -405,6 +412,18 @@ export class AITeacherApp {
                 }
             }
         });
+        
+        // 更新字幕容器
+        const subtitleText = document.getElementById('subtitle-text');
+        const subtitleContainer = document.getElementById('subtitle-container');
+        
+        if (subtitleText && currentText) {
+            subtitleText.textContent = currentText;
+            subtitleContainer.classList.add('active');
+        } else if (subtitleText) {
+            subtitleText.textContent = '字幕将在播放讲解时显示在这里';
+            subtitleContainer.classList.remove('active');
+        }
     }
     
     pauseAudio() {
@@ -449,6 +468,14 @@ export class AITeacherApp {
             
             // 清除高亮
             this.clearHighlights();
+            
+            // 重置字幕
+            const subtitleText = document.getElementById('subtitle-text');
+            const subtitleContainer = document.getElementById('subtitle-container');
+            if (subtitleText) {
+                subtitleText.textContent = '字幕将在播放讲解时显示在这里';
+                subtitleContainer.classList.remove('active');
+            }
         }
     }
     
@@ -466,6 +493,14 @@ export class AITeacherApp {
         // 清除高亮
         this.clearHighlights();
         
+        // 重置字幕
+        const subtitleText = document.getElementById('subtitle-text');
+        const subtitleContainer = document.getElementById('subtitle-container');
+        if (subtitleText) {
+            subtitleText.textContent = '字幕将在播放讲解时显示在这里';
+            subtitleContainer.classList.remove('active');
+        }
+        
         // 自动跳转到下一页（如果启用了自动翻页）
         if (this.autoNavigate && this.pageNum < this.pdfDoc.numPages) {
             // 延迟1.5秒后跳转，给用户一个短暂的停顿时间

server.py

@@ -125,25 +125,23 @@ def text_to_speech(text, voice="zf_xiaoxiao", speed=1.5):
         
         # 将句子按2句一组进行分组
         sentence_pairs = []
-        for i in range(0, len(sentences)):
+        i = 0
+        while i < len(sentences):
             if i + 1 < len(sentences) and len(sentences[i]) + len(sentences[i+1]) < 40:
-                # 如果有两句，合并为一组
                 sentence_pairs.append({
                     "text": sentences[i] + " " + sentences[i+1],
                     "sentences": [sentences[i], sentences[i+1]],
                     "indices": [i, i+1]
                 })
-                i += 1
-            else:   
+                i += 2  # 正确跳过已合并的句子
+            else:
                 sentence_pairs.append({
                     "text": sentences[i],
                     "sentences": [sentences[i]],
                     "indices": [i]
                 })
+                i += 1  # 正常递增
 
-                
-
-        
         # 存储所有音频段和时间戳
         audio_segments = []
         timestamps = []