Add text-only editable PPTX export option

README.md

@@ -152,6 +152,7 @@
 
 ### 5. 可自由编辑的pptx导出（Beta迭代中）
 - **导出图像为高还原度、背景干净的、可自由编辑图像和文字的PPT页面**
+- 可在导出前勾选「仅文字层可编辑」，生成只抹除文字的底图并让识别出的文字变成可编辑文本框；系统会用 VLM 复核底图文字是否抹除，失败时自动重试并选择漏抹最少的版本（默认不勾选）。
 - 相关更新见 https://github.com/Anionex/banana-slides/issues/121
 <img width="1000"  alt="image" src="https://github.com/user-attachments/assets/a85d2d48-1966-4800-a4bf-73d17f914062" />
 

README_EN.md

@@ -153,6 +153,7 @@ No longer restricted by complex menu buttons, issue modification commands direct
 ### 5. Freely Editable PPTX Export (In Beta)
 
 - **Export images as high-fidelity, clean-background PPT pages with freely editable images and text**
+- Enable **Only Text Layers Editable** before export to generate a text-erased background while making only detected text editable. VLM verification checks whether the background still contains text; Banana Slides retries failed erasures and keeps the candidate with the fewest missed text regions. This option is off by default.
 - For related updates, see https://github.com/Anionex/banana-slides/issues/121
 <img width="1000"  alt="image" src="https://github.com/user-attachments/assets/a85d2d48-1966-4800-a4bf-73d17f914062" />
 

backend/controllers/export_controller.py

@@ -8,6 +8,7 @@
 import time
 import zipfile
 from pathlib import Path
+from datetime import datetime
 
 from flask import Blueprint, request, current_app
 from werkzeug.utils import secure_filename
@@ -384,7 +385,8 @@ def export_editable_pptx(project_id):
             "filename": "optional_custom_name.pptx",
             "page_ids": ["id1", "id2"],  // 可选，要导出的页面ID列表（不提供则导出所有）
             "max_depth": 1,      // 可选，递归深度（默认1=不递归，2=递归一层）
-            "max_workers": 4     // 可选，并发数（默认4）
+            "max_workers": 4,    // 可选，并发数（默认4）
+            "text_only": false   // 可选，仅让文字层可编辑，默认false
         }
 
     Returns:
@@ -433,6 +435,7 @@ def export_editable_pptx(project_id):
         # max_depth 语义：1=只处理表层不递归，2=递归一层（处理图片/图表中的子元素）
         max_depth = data.get('max_depth', 1)  # 默认不递归，与测试脚本一致
         max_workers = data.get('max_workers', 4)
+        text_only = data.get('text_only', False)
 
         # Validate parameters
         # max_depth >= 1: 至少处理表层元素
@@ -441,6 +444,9 @@ def export_editable_pptx(project_id):
 
         if not isinstance(max_workers, int) or max_workers < 1 or max_workers > 16:
             return bad_request("max_workers must be an integer between 1 and 16")
+
+        if not isinstance(text_only, bool):
+            return bad_request("text_only must be a boolean")
 
         # Create task record
         task = Task(
@@ -451,7 +457,10 @@ def export_editable_pptx(project_id):
         db.session.add(task)
         db.session.commit()
 
-        logger.info(f"Created export task {task.id} for project {project_id} (recursive analysis: depth={max_depth}, workers={max_workers})")
+        logger.info(
+            f"Created export task {task.id} for project {project_id} "
+            f"(recursive analysis: depth={max_depth}, workers={max_workers}, text_only={text_only})"
+        )
 
         # Get services
         from services.file_service import FileService
@@ -476,20 +485,28 @@ def export_editable_pptx(project_id):
         )
 
         # 使用递归分析任务（不需要 ai_service，使用 ImageEditabilityService）
-        task_manager.submit_task(
-            task.id,
-            export_editable_pptx_with_recursive_analysis_task,
-            project_id=project_id,
-            filename=filename,
-            file_service=file_service,
-            page_ids=selected_page_ids if selected_page_ids else None,
-            max_depth=max_depth,
-            max_workers=max_workers,
-            export_extractor_method=export_extractor_method,
-            export_inpaint_method=export_inpaint_method,
-            enable_icon_subject_extraction=enable_icon_subject_extraction,
-            app=app
-        )
+        try:
+            task_manager.submit_task(
+                task.id,
+                export_editable_pptx_with_recursive_analysis_task,
+                project_id=project_id,
+                filename=filename,
+                file_service=file_service,
+                page_ids=selected_page_ids if selected_page_ids else None,
+                max_depth=max_depth,
+                max_workers=max_workers,
+                export_extractor_method=export_extractor_method,
+                export_inpaint_method=export_inpaint_method,
+                enable_icon_subject_extraction=enable_icon_subject_extraction,
+                text_only=text_only,
+                app=app
+            )
+        except Exception as submission_err:
+            task.status = 'FAILED'
+            task.error_message = f"Task submission failed: {submission_err}"
+            task.completed_at = datetime.utcnow()
+            db.session.commit()
+            raise
 
         logger.info(f"Submitted recursive export task {task.id} to task manager")
 
@@ -498,7 +515,8 @@ def export_editable_pptx(project_id):
                 "task_id": task.id,
                 "method": "recursive_analysis",
                 "max_depth": max_depth,
-                "max_workers": max_workers
+                "max_workers": max_workers,
+                "text_only": text_only
             },
             message="Export task created (using recursive analysis)"
         )

backend/controllers/project_controller.py

@@ -1567,6 +1567,7 @@ def create_ppt_renovation_project():
             image_caption_model=current_app.config['IMAGE_CAPTION_MODEL'],
             provider_format=current_app.config.get('AI_PROVIDER_FORMAT', 'gemini'),
             lazyllm_image_caption_source=current_app.config.get('IMAGE_CAPTION_MODEL_SOURCE', 'doubao'),
+            upload_folder=current_app.config['UPLOAD_FOLDER'],
         )
 
         app = current_app._get_current_object()

backend/controllers/settings_controller.py

@@ -909,6 +909,7 @@ def _create_file_parser():
             Config, 'IMAGE_CAPTION_MODEL_SOURCE', None
         ),
         provider_format=caption_format,
+        upload_folder=current_app.config.get("UPLOAD_FOLDER", Config.UPLOAD_FOLDER),
     )