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    Nuklear
    
   This is a minimal-state, immediate-mode graphical user interface toolkit written in ANSI C and licensed under public domain. It was designed as a simple embeddable user interface for application and does not have any dependencies, a default render backend or OS window/input handling but instead provides a highly modular, library-based approach, with simple input state for input and draw commands describing primitive shapes as output. So instead of providing a layered library that tries to abstract over a number of platform and render backends, it focuses only on the actual UI. 
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Data Fields | |
| struct nk_text_undo_record | undo_rec [NK_TEXTEDIT_UNDOSTATECOUNT] | 
| nk_rune | undo_char [NK_TEXTEDIT_UNDOCHARCOUNT] | 
| short | undo_point | 
| short | redo_point | 
| short | undo_char_point | 
| short | redo_char_point |