46 lines
1.3 KiB
Lua
46 lines
1.3 KiB
Lua
local utils = wesnoth.require "wml-utils"
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-- registers an event handler. note that, like all lua variables this is not persitent in savefiles,
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-- so you have to call this function from a toplevel lua tag or from a preload event.
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-- It is also not possible to use this for first_time_only=yes events.
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local event_handlers = {}
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local old_on_event = wesnoth.game_events.on_event or function(eventname) end
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wesnoth.game_events.on_event = function(eventname)
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old_on_event(eventname)
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local context = nil
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for k,v in pairs(event_handlers[eventname] or {}) do
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if context == nil then
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context = wesnoth.current.event_context
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end
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v.h(context)
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end
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end
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local function on_event(eventname, arg1, arg2)
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if string.match(eventname, ",") then
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for elem in utils.split(eventname or "") do
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on_event(elem, arg1, arg2)
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end
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return
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end
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local priority = 0
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local handler
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if type(arg1) == "function" then
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handler = arg1
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else
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priority = arg1
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handler = arg2
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end
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eventname = string.gsub(eventname, " ", "_")
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event_handlers[eventname] = event_handlers[eventname] or {}
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local eh = event_handlers[eventname]
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table.insert(eh, { h = handler, p = priority})
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-- sort it.
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for i = #eh - 1, 1, -1 do
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if eh[i].p < eh[i + 1].p then
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eh[i], eh[i + 1] = eh[i + 1], eh[i]
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end
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end
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end
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return on_event
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