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…22270) When a page is rendered again, AnnotationEditorLayer.render() adds the page's editors back, which calls onceAdded(). Highlight, ink and signature editors recorded their creation every time, so each render pushed another undo step that removes an editor created earlier, and undo no longer reverted the last change. Record the creation only the first time, like StampEditor already does.
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Fixes #22270.
When a page is rendered again,
AnnotationEditorLayer.render()adds the page's editors back withadd(), which callsonceAdded().HighlightEditorandDrawingEditor(and so ink and signature editors) calledaddUndoableEditor()fromonceAdded()every time, so each render pushed another undo step whose undo removes an editor created earlier. After scrolling a page out of the rendering buffer and back, undo removed an older annotation instead of reverting the last change.This adds
DrawingEditor._addToUndoStack(), which records the creation only the first time, asStampEditoralready does with#hasBeenAddedInUndoStack. It's used by the highlight and drawingonceAdded()and bySignatureEditor.addSignature(), so a signature added through the dialog isn't recorded a second time when its page is rendered again.The new integration test highlights a word on page 1 and another on page 14 (the last change), scrolls back so that page 1 is rendered again, and checks that undo removes the highlight on page 14. It follows the existing "Delete a highlight, scroll and undo it" test. I couldn't run the integration tests locally, so I'd appreciate a botio run; eslint and prettier pass on the changed files.