Andreas Kling 14b83ee12f LibGUI: Give GTextDocument access to the GTextEditor during commands ...

It's useful for the GTextDocument to have access to the initiating
GTextEditor widget during the initial execution of a command.

Since commands are executed via calls to GUndoCommand::redo(), we do
this by wrapping the invocation of redo() in a new helper called
GTextDocumentUndoCommand::execute_from(GTextDocument::Client).

This is then used to fetch the current auto-indentation feature state
and the soft tab width, both used by text insertion.

2020-01-23 21:33:15 +01:00

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