forked from mtcontrib/Minetest-WorldEdit
66 lines
2.0 KiB
Lua
66 lines
2.0 KiB
Lua
local safe_region_callback = {}
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local safe_region_param = {}
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local function check_region(name, param)
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local pos1, pos2 = worldedit.pos1[name], worldedit.pos2[name] --obtain positions
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if pos1 == nil or pos2 == nil then
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worldedit.player_notify(name, "no region selected")
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return nil
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end
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return worldedit.volume(pos1, pos2)
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end
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--`callback` is a callback to run when the user confirms
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--`nodes_needed` is a function accepting `param`, `pos1`, and `pos2` to calculate the number of nodes needed
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local function safe_region(callback, nodes_needed)
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--default node volume calculation
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nodes_needed = nodes_needed or check_region
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return function(name, param)
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--check if the operation applies to a safe number of nodes
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local count = nodes_needed(name, param)
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if count == nil then return end --invalid command
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if count < 10000 then
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return callback(name, param)
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end
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--save callback to call later
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safe_region_callback[name], safe_region_param[name] = callback, param
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worldedit.player_notify(name, "WARNING: this operation could affect up to " .. count .. " nodes; type //y to continue or //n to cancel")
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end
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end
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local function reset_pending(name)
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safe_region_callback[name], safe_region_param[name] = nil, nil
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end
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minetest.register_chatcommand("/y", {
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params = "",
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description = "Confirm a pending operation",
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func = function(name)
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local callback, param = safe_region_callback[name], safe_region_param[name]
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if not callback then
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worldedit.player_notify(name, "no operation pending")
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return
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end
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safe_region_callback[name], safe_region_param[name] = nil, nil --reset pending operation
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callback(name, param)
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end,
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})
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minetest.register_chatcommand("/n", {
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params = "",
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description = "Confirm a pending operation",
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func = function(name)
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if not safe_region_callback[name] then
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worldedit.player_notify(name, "no operation pending")
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return
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end
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safe_region_callback[name], safe_region_param[name] = nil, nil
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end,
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})
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return safe_region, check_region, reset_pending
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