2806cbac3d
- Added/updated skill gems and bases - Fixed curse stats with wrong sign - Fixed wrong sources on quality mods
52 lines
1.5 KiB
Lua
52 lines
1.5 KiB
Lua
-- Path of Building
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--
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-- Class: Undo Handler
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-- Handler for classes that need to provide undo/redo functionality
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-- Classes that use this must define 2 functions:
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-- undoState = :CreateUndoState() Returns a new undo state that reflects the current state
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-- :RestoreUndoState(undoState) Reverts the current state to the given undo state
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--
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local t_insert = table.insert
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local t_remove = table.remove
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local UndoHandlerClass = newClass("UndoHandler", function(self)
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self.undo = { }
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self.redo = { }
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end)
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-- Initialises the undo/redo buffers
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-- Should be called after the current state is first loaded/initialised
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function UndoHandlerClass:ResetUndo()
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self.undo = wipeTable(self.undo)
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self.redo = wipeTable(self.redo)
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self.undo[1] = self:CreateUndoState()
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end
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-- Adds a new undo state to the undo buffer, and also clears the redo buffer
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-- Should be called after the user makes a change to the current state
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function UndoHandlerClass:AddUndoState(noClearRedo)
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t_insert(self.undo, 1, self:CreateUndoState())
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self.undo[102] = nil
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self.modFlag = true
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if not noClearRedo then
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self.redo = wipeTable(self.redo)
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end
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end
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-- Reverts the current state to the previous undo state
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function UndoHandlerClass:Undo()
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if self.undo[2] then
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t_insert(self.redo, 1, t_remove(self.undo, 1))
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self:RestoreUndoState(t_remove(self.undo, 1))
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self:AddUndoState(true)
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end
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end
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-- Reverts the most recent undo operation
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function UndoHandlerClass:Redo()
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if self.redo[1] then
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self:RestoreUndoState(t_remove(self.redo, 1))
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self:AddUndoState(true)
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end
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end
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