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Rename 'context' to 'world'
This commit is contained in:
Justin van der Leij
parent
26bd0ef937
commit
83162ec02c
5 changed files with 69 additions and 72 deletions
288
src/context.lua
288
src/context.lua
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@ -1,288 +0,0 @@
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--- Context
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local PATH = (...):gsub('%.[^%.]+$', '')
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local Type = require(PATH..".type")
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local List = require(PATH..".list")
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local Context = {}
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Context.__index = Context
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--- Creates a new Context.
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-- @return The new context
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function Context.new()
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local context = setmetatable({
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entities = List(),
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systems = List(),
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events = {},
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marked = {},
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removed = {},
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__isContext = true,
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}, Context)
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return context
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end
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--- Adds an Entity to the Context.
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-- @param e The Entity to add
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-- @return self
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function Context:addEntity(e)
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if not Type.isEntity(e) then
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error("bad argument #1 to 'Context:addEntity' (Entity expected, got "..type(e)..")", 2)
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end
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self:onEntityAdded(e)
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e.contexts:add(self)
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self.entities:add(e)
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self:checkEntity(e)
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return self
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end
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--- Marks an Entity as removed from the Context.
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-- @param e The Entity to mark
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-- @return self
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function Context:removeEntity(e)
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if not Type.isEntity(e) then
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error("bad argument #1 to 'Context:removeEntity' (Entity expected, got "..type(e)..")", 2)
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end
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self.removed[#self.removed + 1] = e
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return self
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end
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function Context:markEntity(e)
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if not Type.isEntity(e) then
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error("bad argument #1 to 'Context:markEntity' (Entity expected, got "..type(e)..")", 2)
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end
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self.marked[#self.marked + 1] = e
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return self
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end
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--- Checks an Entity against all the systems in the Context.
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-- @param e The Entity to check
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-- @return self
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function Context:checkEntity(e)
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if not Type.isEntity(e) then
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error("bad argument #1 to 'Context:checkEntity' (Entity expected, got "..type(e)..")", 2)
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end
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for i = 1, self.systems.size do
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self.systems:get(i):__check(e)
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end
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return self
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end
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--- Completely removes all marked Entities in the Context.
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-- @return self
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function Context:flush()
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while #self.marked > 0 do
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local marked = self.removed
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self.removed = {}
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for i = 1, #marked do
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local e = marked[i]
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e.contexts:apply()
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e.contexts:checkEntity(e)
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end
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end
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while #self.removed > 0 do
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local removed = self.removed
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self.removed = {}
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for i = 1, #removed do
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local e = removed[i]
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e.contexts:remove(self)
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self.entities:remove(e)
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for j = 1, self.systems.size do
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self.systems:get(j):__remove(e)
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end
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self:onEntityRemoved(e)
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end
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end
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for i = 1, self.systems.size do
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local system = self.systems:get(i)
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system:flush()
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system:clear()
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end
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return self
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end
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--- Adds a System to the Context.
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-- @param system The System to add
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-- @param eventName The Event to register to
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-- @param callback The function name to call. Defaults to eventName
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-- @param enabled If the system is enabled. Defaults to true
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-- @return self
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function Context:addSystem(system, eventName, callback, enabled)
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if not Type.isSystem(system) then
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error("bad argument #1 to 'Context:addSystem' (System expected, got "..type(system)..")", 2)
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end
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if system.__context and system.__context ~= self then
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error("System already in context '" ..tostring(system.__context).."'")
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end
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if not self.systems:has(system) then
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self.systems:add(system)
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system.__context = self
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system:addedTo(self)
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end
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if eventName then
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self.events[eventName] = self.events[eventName] or {}
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local i = #self.events[eventName] + 1
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self.events[eventName][i] = {
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system = system,
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callback = callback or eventName,
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enabled = enabled == nil or enabled,
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}
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if enabled == nil or enabled then
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system:enabledCallback(callback or eventName)
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end
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end
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local e
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for i = 1, self.entities.size do
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e = self.entities:get(i)
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self:checkEntity(e)
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end
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return self
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end
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--- Enables a System in the Context.
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-- @param system The System to enable
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-- @param eventName The Event it was registered to
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-- @param callback The callback it was registered with. Defaults to eventName
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-- @return self
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function Context:enableSystem(system, eventName, callback)
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if not Type.isSystem(system) then
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error("bad argument #1 to 'Context:enableSystem' (System expected, got "..type(system)..")", 2)
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end
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return self:setSystem(system, eventName, callback, true)
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end
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--- Disables a System in the Context.
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-- @param system The System to disable
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-- @param eventName The Event it was registered to
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-- @param callback The callback it was registered with. Defaults to eventName
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-- @return self
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function Context:disableSystem(system, eventName, callback)
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if not Type.isSystem(system) then
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error("bad argument #1 to 'Context:disableSystem' (System expected, got "..type(system)..")", 2)
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end
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return self:setSystem(system, eventName, callback, false)
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end
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--- Sets a System 'enable' in the Context.
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-- @param system The System to set
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-- @param eventName The Event it was registered to
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-- @param callback The callback it was registered with. Defaults to eventName
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-- @param enable The state to set it to
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-- @return self
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function Context:setSystem(system, eventName, callback, enable)
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if not Type.isSystem(system) then
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error("bad argument #1 to 'Context:setSystem' (System expected, got "..type(system)..")", 2)
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end
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callback = callback or eventName
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if callback then
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local listeners = self.events[eventName]
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if listeners then
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for i = 1, #listeners do
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local listener = listeners[i]
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if listener.system == system and listener.callback == callback then
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if enable and not listener.enabled then
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system:enabledCallback(callback)
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elseif not enable and listener.enabled then
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system:disabledCallback(callback)
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end
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listener.enabled = enable
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break
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end
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end
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end
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end
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return self
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end
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--- Emits an Event in the Context.
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-- @param eventName The Event that should be emitted
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-- @param ... Parameters passed to listeners
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-- @return self
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function Context:emit(eventName, ...)
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if not eventName or type(eventName) ~= "string" then
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error("bad argument #1 to 'Context:emit' (String expected, got "..type(eventName)..")")
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end
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self:flush()
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local listeners = self.events[eventName]
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if listeners then
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for i = 1, #listeners do
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local listener = listeners[i]
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if listener.enabled then
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listener.system[listener.callback](listener.system, ...)
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end
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end
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end
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return self
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end
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--- Removes all entities from the Context
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-- @return self
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function Context:clear()
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for i = 1, self.entities.size do
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self.entities:get(i):destroy()
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end
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self:flush()
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return self
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end
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--- Default callback for adding an Entity.
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-- @param e The Entity that was added
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function Context:onEntityAdded(e) -- luacheck: ignore
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end
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--- Default callback for removing an Entity.
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-- @param e The Entity that was removed
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function Context:onEntityRemoved(e) -- luacheck: ignore
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end
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return setmetatable(Context, {
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__call = function(_, ...)
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return Context.new(...)
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end,
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})
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