Add run cancelling logic to extension manager

Author: StAlKeR7779

invokeai/app/invocations/denoise_latents.py

@@ -723,7 +723,7 @@ def invoke(self, context: InvocationContext) -> LatentsOutput:
     @torch.no_grad()
     @SilenceWarnings()  # This quenches the NSFW nag from diffusers.
     def _new_invoke(self, context: InvocationContext) -> LatentsOutput:
-        ext_manager = ExtensionsManager()
+        ext_manager = ExtensionsManager(is_canceled=context.util.is_canceled)
 
         device = TorchDevice.choose_torch_device()
         dtype = TorchDevice.choose_torch_dtype()

invokeai/backend/stable_diffusion/extensions_manager.py

@@ -3,14 +3,16 @@
 from abc import ABC, abstractmethod
 from contextlib import ExitStack, contextmanager
 from functools import partial
-from typing import TYPE_CHECKING, Callable, Dict
+from typing import TYPE_CHECKING, Callable, Dict, List, Optional
 
 import torch
 from diffusers import UNet2DConditionModel
 
+from invokeai.app.services.session_processor.session_processor_common import CanceledException
+
 if TYPE_CHECKING:
     from invokeai.backend.stable_diffusion.denoise_context import DenoiseContext
-    from invokeai.backend.stable_diffusion.extensions import ExtensionBase
+    from invokeai.backend.stable_diffusion.extensions.base import ExtensionBase
 
 
 class ExtCallbacksApi(ABC):
@@ -71,10 +73,11 @@ def __call__(self, *args, **kwargs):
 
 
 class ExtensionsManager:
-    def __init__(self):
-        self.extensions = []
+    def __init__(self, is_canceled: Optional[Callable[[], bool]] = None):
+        self.extensions: List[ExtensionBase] = []
+        self._is_canceled = is_canceled
 
-        self._callbacks = {}
+        self._callbacks: Dict[str, CallbackInjectionPoint] = {}
         self.callbacks: ExtCallbacksApi = ProxyCallsClass(self.call_callback)
 
     def add_extension(self, ext: ExtensionBase):
@@ -93,6 +96,11 @@ def add_extension(self, ext: ExtensionBase):
                     raise Exception(f"Unsupported injection type: {inj_info.type}")
 
     def call_callback(self, name: str, *args, **kwargs):
+        # TODO: add to patchers too?
+        # and if so, should it be only in beginning of function or in for loop
+        if self._is_canceled and self._is_canceled():
+            raise CanceledException
+
         if name in self._callbacks:
             self._callbacks[name](*args, **kwargs)