137 lines
3.5 KiB
Lua
137 lines
3.5 KiB
Lua
-- kit of standard functions
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-- Check if given table is an array
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function is_array(x)
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if #t > 0 then
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return true
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end
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for k, v in pairs(x) do
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return false
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end
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return true
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end
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-- Get entry-point and filename from `entry-point:filename` path
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function parse_path(path)
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local index = string.find(path, ':')
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if index == nil then
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error("invalid path syntax (':' missing)")
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end
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return string.sub(path, 1, index-1), string.sub(path, index+1, -1)
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end
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local __cached_scripts = {}
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local __cached_results = {}
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-- Load script with caching
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--
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-- path - script path `contentpack:filename`.
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-- Example `base:scripts/tests.lua`
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--
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-- nocache - ignore cached script, load anyway
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function load_script(path, nocache)
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local packname, filename = parse_path(path)
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local fullpath = file.resolve(path);
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-- __cached_scripts used in condition because cached result may be nil
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if not nocache and __cached_scripts[fullpath] ~= nil then
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return __cached_results[fullpath]
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end
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if not file.isfile(path) then
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error("script '"..filename.."' not found in '"..packname.."'")
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end
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local script, err = loadfile(fullpath)
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if script == nil then
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error(err)
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end
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local result = script()
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if not nocache then
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__cached_scripts[fullpath] = script
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__cached_results[fullpath] = result
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end
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return result
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end
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function require(path)
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local prefix, file = parse_path(path)
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return load_script(prefix..":modules/"..file..".lua")
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end
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function __reset_scripts_cache()
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__cached_scripts = {}
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__cached_results = {}
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end
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function sleep(timesec)
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local start = time.uptime()
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while time.uptime() - start < timesec do
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coroutine.yield()
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end
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end
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_dofile = dofile
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-- Replaces dofile('*/content/packid/*') with load_script('packid:*')
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function dofile(path)
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local index = string.find(path, "/content/")
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if index then
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local newpath = string.sub(path, index+9)
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index = string.find(newpath, "/")
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if index then
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local label = string.sub(newpath, 1, index-1)
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newpath = label..':'..string.sub(newpath, index+1)
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if file.isfile(newpath) then
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return load_script(newpath, true)
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end
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end
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end
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return _dofile(path)
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end
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function pack.is_installed(packid)
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return file.isfile(packid..":package.json")
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end
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vec2_mt = {}
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function vec2_mt.__tostring(self)
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return "vec2("..self[1]..", "..self[2]..")"
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end
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vec3_mt = {}
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function vec3_mt.__tostring(self)
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return "vec3("..self[1]..", "..self[2]..", "..self[3]..")"
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end
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vec4_mt = {}
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function vec4_mt.__tostring(self)
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return "vec4("..self[1]..", "..self[2]..", "..self[3]..", "..self[4]..")"
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end
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color_mt = {}
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function color_mt.__tostring(self)
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return "rgba("..self[1]..", "..self[2]..", "..self[3]..", "..self[4]..")"
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end
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-- class designed for simple UI-nodes access via properties syntax
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local Element = {}
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function Element.new(docname, name)
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return setmetatable({docname=docname, name=name}, {
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__index=function(self, k)
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return gui.getattr(self.docname, self.name, k)
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end,
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__newindex=function(self, k, v)
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gui.setattr(self.docname, self.name, k, v)
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end
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})
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end
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-- the engine automatically creates an instance for every ui document (layout)
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Document = {}
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function Document.new(docname)
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return setmetatable({name=docname}, {
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__index=function(self, k)
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return Element.new(self.name, k)
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end
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})
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end
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