This project is a basic text editor that comes in five flavors. All versions except the last one use a gap buffer, a specialized data structure to store the textual data and allows for efficient insertion and deletion at the caret position.
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imperative
no signals or events, only imperative code, value changes are propagated via observables (Swing Reactors) -
events
REScala events (but no signals)
event stream composition is a bit complex, but this reduces the number of places where the caret needs to be updated -
signal0
based on the imperative version but uses REScala events and signals to express dependencies (e.g. line count etc.) -
signal1
based on the events version but uses REScala signals -
signal2
based on the signals1 version
this version does not use a mutable data structure (gap buffer) to represent the text, state is represented using signals and events only. There is just very little imperative code left that is needed to interact with certain library functions (like clipboard copy/paste)