feat: add assertions to the Application component

backend/modelscope_studio/components/base/application/__init__.py

@@ -5,7 +5,8 @@
 from gradio.data_classes import GradioModel
 from gradio.events import EventListener
 
-from ....utils.dev import ModelScopeDataLayoutComponent, resolve_frontend_dir
+from ....utils.dev import (AppContext, ModelScopeDataLayoutComponent,
+                           resolve_frontend_dir)
 
 
 class ApplicationPageScreenData(GradioModel):
@@ -65,6 +66,7 @@ def __init__(
             key: int | str | None = None,
             render: bool = True,
             **kwargs):
+        AppContext.set_app(self)
         super().__init__(value=value,
                          visible=visible,
                          render=render,

backend/modelscope_studio/components/legacy/Chatbot/__init__.py

@@ -11,7 +11,7 @@
 from gradio_client import utils as client_utils
 from gradio_client.documentation import document, set_documentation_group
 
-from ....utils.dev import (CustomComponentDict, process_links,
+from ....utils.dev import (AppContext, CustomComponentDict, process_links,
                            resolve_frontend_dir)
 from ..MultimodalInput import MultimodalInputData
 
@@ -147,6 +147,7 @@ def __init__(
             preview: If True (default), will enable image preview.
             custom_components: Define custom tags for markdown rendering.
         """
+        AppContext.assert_app()
         self.likeable = likeable
         self.height = height
         self.rtl = rtl

backend/modelscope_studio/components/legacy/Flow/__init__.py

@@ -9,7 +9,7 @@
 from gradio.events import Events
 from gradio_client.documentation import document
 
-from ....utils.dev import CustomComponentDict, resolve_frontend_dir
+from ....utils.dev import AppContext, CustomComponentDict, resolve_frontend_dir
 from .edge import *
 from .edge import Edge
 from .node import *
@@ -88,6 +88,7 @@ def __init__(
             max_zoom: The maximum zoom level.
             custom_components: Define the custom node types for the flow schema.
         """
+        AppContext.assert_app()
         self.height = height
         self.custom_components = custom_components
         self.show_sidebar = show_sidebar

backend/modelscope_studio/components/legacy/Lifecycle/__init__.py

@@ -7,7 +7,7 @@
 from gradio.events import EventListener
 from gradio_client.documentation import document, set_documentation_group
 
-from ....utils.dev import resolve_frontend_dir
+from ....utils.dev import AppContext, resolve_frontend_dir
 
 set_documentation_group("component")
 
@@ -67,6 +67,7 @@ def __init__(
         Parameters:
             every: If `value` is a callable, run the function 'every' number of seconds while the client connection is open. Has no effect otherwise. Queue must be enabled. The event can be accessed (e.g. to cancel it) via this component's .load_event attribute.
         """
+        AppContext.assert_app()
         self._bind_mount_event = _bind_mount_event
         self._bind_resize_event = _bind_resize_event
         self._bind_unmount_event = _bind_unmount_event

backend/modelscope_studio/components/legacy/Markdown/__init__.py

@@ -7,7 +7,7 @@
 from gradio.events import Events
 from gradio_client.documentation import document, set_documentation_group
 
-from ....utils.dev import (CustomComponentDict, process_links,
+from ....utils.dev import (AppContext, CustomComponentDict, process_links,
                            resolve_frontend_dir)
 
 set_documentation_group("component")
@@ -78,6 +78,7 @@ def __init__(
             header_links: If True, will automatically create anchors for headings, displaying a link icon on hover.
             custom_components: Define custom tags for markdown rendering.
         """
+        AppContext.assert_app()
         self.rtl = rtl
         self.enable_latex = enable_latex
         self.latex_single_dollar_delimiter = latex_single_dollar_delimiter

backend/modelscope_studio/components/legacy/MultimodalInput/__init__.py

@@ -1,15 +1,15 @@
 from __future__ import annotations
 
 from pathlib import Path
-from typing import Any, Callable, List, Literal, Optional, Union
+from typing import Any, Callable, List, Literal, Union
 
 from gradio.components.base import FormComponent
 from gradio.data_classes import FileData, GradioModel
 from gradio.events import Events
 from gradio_client import utils as client_utils
 from gradio_client.documentation import document, set_documentation_group
 
-from ....utils.dev import resolve_frontend_dir
+from ....utils.dev import AppContext, resolve_frontend_dir
 
 set_documentation_group("component")
 
@@ -113,6 +113,7 @@ def __init__(self,
             file_preview_props: FilePreview will render if `value.files` is not empty, accepting the following props: height(int).
             webcam_props: Webcam will render if `sources` contains "webcam", accepting the following props: mirror_webcam(bool), include_audio(bool).
         """
+        AppContext.assert_app()
         if type not in ["text", "password", "email"]:
             raise ValueError(
                 '`type` must be one of "text", "password", or "email".')

backend/modelscope_studio/components/legacy/WaterfallGallery/__init__.py

@@ -14,7 +14,7 @@
 from gradio_client.utils import is_http_url_like
 from PIL import Image as _Image  # using _ to minimize namespace pollution
 
-from ....utils.dev import resolve_frontend_dir
+from ....utils.dev import AppContext, resolve_frontend_dir
 
 set_documentation_group("component")
 
@@ -119,6 +119,7 @@ def __init__(self,
             likeable: Whether the gallery image display a like or dislike button. Set automatically by the .like method but has to be present in the signature for it to show up in the config.
             clickable: Whether the gallery image display an action button. Set automatically by the .click method but has to be present in the signature for it to show up in the config.
         """
+        AppContext.assert_app()
         self.columns = columns
         self.height = height
         self.gap = gap

backend/modelscope_studio/utils/dev/__init__.py

@@ -1,5 +1,6 @@
 from typing import List, Optional, TypedDict
 
+from .app_context import *
 from .component import *
 from .process_links import process_links
 from .resolve_frontend_dir import *

backend/modelscope_studio/utils/dev/app_context.py

@@ -0,0 +1,21 @@
+class AppContext:
+    _app = None
+
+    @classmethod
+    def set_app(cls, app):
+        cls._app = app
+
+    @classmethod
+    def has_app(cls):
+        return cls._app is not None
+
+    @classmethod
+    def assert_app(cls):
+        if cls._app is None:
+            raise ImportError(
+                """<modelscope-studio>: Cannot find the `Application` component, did you forget to import it from `modelscope_studio.components.base`."""
+            )
+
+    @classmethod
+    def get_app(cls):
+        return cls._app

backend/modelscope_studio/utils/dev/component.py

@@ -4,6 +4,8 @@
 from gradio.component_meta import ComponentMeta
 from gradio.components.base import BlockContext, Component
 
+from .app_context import AppContext
+
 
 class ModelScopeLayoutComponent(BlockContext, metaclass=ComponentMeta):
     """
@@ -32,6 +34,7 @@ def __init__(
                          elem_id=elem_id,
                          elem_classes=elem_classes,
                          render=render)
+        AppContext.assert_app()
         self.as_item = as_item
         if self.parent:
             self._internal = dict(index=len(self.parent.children) - 1)
@@ -75,6 +78,8 @@ def __init__(
                          inputs=inputs,
                          load_fn=load_fn,
                          render=render)
+        AppContext.assert_app()
+
         if self.parent:
             self._internal = dict(index=len(self.parent.children) - 1)
         else:
@@ -142,6 +147,8 @@ def __init__(
                               elem_id=elem_id,
                               elem_classes=elem_classes,
                               render=render)
+        AppContext.assert_app()
+
         if self.parent:
             self._internal = dict(index=len(self.parent.children) - 1)
         else: