Update app.py

app.py

@@ -55,9 +55,20 @@ def translate_document(file, target_language, target_country, api_key):
             for slide in prs.slides:
                 for shape in slide.shapes:
                     if hasattr(shape, "text") and shape.text.strip():  # 只翻譯非空文本框
+                        # 保存原始格式信息
+                        original_font_size = None
+                        if shape.has_text_frame:
+                            original_font_size = shape.text_frame.paragraphs[0].runs[0].font.size
+                        
                         translated_text = GoogleTranslator(source='auto', target=target_language).translate(shape.text)
                         shape.text = translated_text  # 用翻譯後的文本替換原始文本
 
+                        # 恢復原始格式
+                        if shape.has_text_frame and original_font_size is not None:
+                            for paragraph in shape.text_frame.paragraphs:
+                                for run in paragraph.runs:
+                                    run.font.size = original_font_size
+
             output_path = "translated_" + os.path.basename(original_file_path)
             prs.save(output_path)
             log_messages.append(f"Saved translated presentation as {output_path}.")