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72 lines
1.7 KiB
72 lines
1.7 KiB
-- Copyright 2012 by Till Tantau
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--
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-- This file may be distributed an/or modified
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--
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-- 1. under the LaTeX Project Public License and/or
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-- 2. under the GNU Public License
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--
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-- See the file doc/generic/pgf/licenses/LICENSE for more information
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--- @release $Header$
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-- Declare the gd namespace
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local gd = {}
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require("pgf").gd = gd
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-- Deprecated:
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--
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--
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-- Helping function for creating new algorithm classes
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--
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-- This function creates a new algorithm class. This class will have a
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-- new method, that takes a graph and, optionally, a parent algorithm
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-- as inputs. They will be stored in the "graph" and "parent_algorithm"
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-- fields, respectively.
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--
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-- @param info This table is used to configure the new class. It has
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-- the following fields: First, there is the "properties" table. If
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-- this table is present, it will be used as the default table. Second,
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-- it can have a graph_parameters table. This table will be used in the
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-- constructor to preload graph parameters from the pgf layer. For
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-- this, each entry of the table should be of the form
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--
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-- key = 'string'
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--
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-- What happens is that upon the creation of a new algorithm object,
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-- for each key we lookup the graph option 'string' and
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-- store its value in the key of the new algorithm object.
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--
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-- @return A table that is a class with a new function setup.
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function gd.new_algorithm_class (class)
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class.__index = class
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class.new =
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function (initial)
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-- Create new object
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local obj = {}
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for k,v in pairs(initial) do
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obj[k] = v
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end
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setmetatable(obj, class)
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return obj
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end
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class.preconditions = {}
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class.postconditions = {}
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return class
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end
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return gd
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