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F4tal1t
commented
May 27, 2026
| if card == nil { | ||
| return storage.MosuData{} | ||
| } | ||
| return storage.MosuData{ |
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Summary of runtime flow:
User action (keystroke, drag end, erase) -> Tool/Card code collects minimal serializable data -> calls a Commit* helper on MosugoCanvas -> MosugoCanvas wraps into a historyCommand and commitCommand pushes it onto undoStack and clears redoStack.
When Undo() is called, MosugoCanvas pops last command and calls Undo(canvas) on it while suppressHistory=true so undoing actions do not themselves create history entries; then it calls refreshIfReady() to update the UI. Redo() is symmetric.