Add clipspace feature. (#541)

* Add clipspace feature.
* feat: copy content to clipspace
* feat: paste content from clipspace

Extend validation to allow for validating annotated_path in addition to other parameters.

Add support for annotated_filepath in folder_paths function.

Generalize the '/upload/image' API to allow for uploading images to the 'input', 'temp', or 'output' directories.

* rename contentClipboard -> clipspace

* Do deep copy for imgs on copy to clipspace.

* add original_imgs into clipspace
* Preserve the original image when 'imgs' are modified

* robust patch & refactoring folder_paths about annotated_filepath

* Only show the Paste menu if the ComfyApp.clipspace is not empty

* instant refresh on paste

force triggering 'changed' on paste action

* subfolder fix on paste logic

attach subfolder if subfolder isn't empty

---------

Co-authored-by: Lt.Dr.Data <lt.dr.data@gmail.com>

execution.py

@@ -11,6 +11,7 @@ import torch
 import nodes
 
 import comfy.model_management
+import folder_paths
 
 def get_input_data(inputs, class_def, unique_id, outputs={}, prompt={}, extra_data={}):
     valid_inputs = class_def.INPUT_TYPES()
@@ -250,7 +251,12 @@ def validate_inputs(prompt, item):
                     return (False, "Value bigger than max. {}, {}".format(class_type, x))
 
             if isinstance(type_input, list):
-                if val not in type_input:
+                is_annotated_path = val.endswith("[temp]") or val.endswith("[input]") or val.endswith("[output]")
+                if is_annotated_path:
+                    if not folder_paths.exists_annotated_filepath(val):
+                        return (False, "Invalid file path. {}, {}: {}".format(class_type, x, val))
+
+                elif val not in type_input:
                     return (False, "Value not in list. {}, {}: {} not in {}".format(class_type, x, val, type_input))
     return (True, "")