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LibGUI: Use UndoStack::on_state_change inside TextDocument/TextEditor
Have TextDocument listen for state changes on the internal undo stack, and forward those to all clients via a new virtual function. This simplifies updating the can_undo / can_redo states of TextEditor.
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5 changed files with 17 additions and 2 deletions
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@ -102,6 +102,7 @@ public:
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virtual void document_did_change() override {};
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virtual void document_did_set_text() override {};
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virtual void document_did_set_cursor(const GUI::TextPosition&) override {};
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virtual void document_did_update_undo_stack() override { }
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virtual bool is_automatic_indentation_enabled() const override { return false; }
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virtual int soft_tab_width() const override { return 4; }
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