Disable caret at end of line detection in Chromium

source/NVDAObjects/IAccessible/chromium.py

@@ -166,6 +166,25 @@ def _get_role(self) -> controlTypes.Role:
 		return controlTypes.Role.FIGURE
 
 
+class EditorTextInfo(ia2Web.MozillaCompoundTextInfo):
+	"""The TextInfo for edit areas such as edit fields and documents in Chromium."""
+
+	def _isCaretAtEndOfLine(self, caretObj: IAccessible) -> bool:
+		# Detecting if the caret is at the end of the line in Chromium is not currently possible
+		# as Chromium's IAccessibleText::textAtOffset with IA2_OFFSET_CARET returns the first character of the next line,
+		# which is what we are trying to avoid in the first place.
+		# #17039: In some scenarios such as in large files in VS Code,
+		# this call is extreamly costly for no actual bennifit right now,
+		# so we are disabling it for Chromium.
+		return False
+
+
+class Editor(ia2Web.Editor):
+	"""The NVDAObject for edit areas such as edit fields and documents in Chromium."""
+
+	TextInfo = EditorTextInfo
+
+
 def findExtraOverlayClasses(obj, clsList):
 	"""Determine the most appropriate class(es) for Chromium objects.
 	This works similarly to L{NVDAObjects.NVDAObject.findOverlayClasses} except that it never calls any other findOverlayClasses method.
@@ -188,3 +207,5 @@ def findExtraOverlayClasses(obj, clsList):
 		clsList,
 		documentClass=Document,
 	)
+	if ia2Web.Editor in clsList:
+		clsList.insert(0, Editor)

source/appModules/code.py

@@ -7,41 +7,23 @@
 
 import appModuleHandler
 import controlTypes
-from NVDAObjects.IAccessible.ia2Web import Editor
 from NVDAObjects.IAccessible.chromium import Document
-from NVDAObjects.IAccessible.ia2TextMozilla import MozillaCompoundTextInfo
 from NVDAObjects import NVDAObject, NVDAObjectTextInfo
 
 
-class VSCodeEditorTextInfo(MozillaCompoundTextInfo):
-	def _isCaretAtEndOfLine(self, caretObj) -> bool:
-		# #17039: IAccessibleText::textAtOffset with IA2_OFFSET_CARET is way too costly in VSCode.
-		# And doesn't actually work correctly in Chromium yet anyway.
-		# So it is best not to try detecting for now.
-		return False
-
-
-class VSCodeEditor(Editor):
-	TextInfo = VSCodeEditorTextInfo
-
-
 class VSCodeDocument(Document):
 	"""The only content in the root document node of Visual Studio code is the application object.
 	Creating a tree interceptor on this object causes a major slow down of Code.
 	Therefore, forcefully block tree interceptor creation.
 	"""
 
-	textInfo = VSCodeEditorTextInfo
-
 	_get_treeInterceptorClass = NVDAObject._get_treeInterceptorClass
 
 
 class AppModule(appModuleHandler.AppModule):
 	def chooseNVDAObjectOverlayClasses(self, obj, clsList):
 		if Document in clsList and obj.IA2Attributes.get("tag") == "#document":
 			clsList.insert(0, VSCodeDocument)
-		elif Editor in clsList:
-			clsList.insert(0, VSCodeEditor)
 
 	def event_NVDAObject_init(self, obj: NVDAObject):
 		# This is a specific fix for Visual Studio Code,