How to programmatically implement a contrasting UI style similar to code diff in ide?

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Permanently deleted user
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Just like the effect of the above picture, I hope to be able to achieve this effect through programming in the ide editor. Is there any relevant source code in the SDK for reference?

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Brian Faris
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I haven't tested it but Editor.getMarkupModel().addRangeHighlighter() might be what you are looking for.

Can get editor object with

Editor editor = FileEditorManager.getInstance(project).getSelectedTextEditor();
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