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" Object.vim -- Prototype objects?
" @Author: Thomas Link (micathom AT gmail com?subject=[vim])
" @Website: http://members.a1.net/t.link/
" @License: GPL (see http://www.gnu.org/licenses/gpl.txt)
" @Created: 2007-05-01.
" @Last Change: 2008-08-20.
" @Revision: 0.1.118
" :filedoc:
" Provides a prototype plus some OO-like methods.
if &cp || exists("loaded_tlib_object_autoload")
finish
endif
let loaded_tlib_object_autoload = 1
let s:id_counter = 0
let s:prototype = {'_class': ['object'], '_super': [], '_id': 0} "{{{2
" :def: function! tlib#Object#New(?fields={})
" This function creates a prototype that provides some kind of
" inheritance mechanism and a way to call parent/super's methods.
"
" The usage demonstrated in the following example works best, when every
" class/prototype is defined in a file of its own.
"
" The reason for why there is a dedicated constructor function is that
" this layout facilitates the use of templates and that methods are
" hidden from the user. Other solutions are possible.
"
" EXAMPLES: >
" let s:prototype = tlib#Object#New({
" \ '_class': ['FooBar'],
" \ 'foo': 1,
" \ 'bar': 2,
" \ })
" " Constructor
" function! FooBar(...)
" let object = s:prototype.New(a:0 >= 1 ? a:1 : {})
" return object
" endf
" function! s:prototype.babble() {
" echo "I think, therefore I am ". (self.foo * self.bar) ." months old."
" }
"
" < This could now be used like this: >
" let myfoo = FooBar({'foo': 3})
" call myfoo.babble()
" => I think, therefore I am 6 months old.
" echo myfoo.IsA('FooBar')
" => 1
" echo myfoo.IsA('object')
" => 1
" echo myfoo.IsA('Foo')
" => 0
" echo myfoo.RespondTo('babble')
" => 1
" echo myfoo.RespondTo('speak')
" => 0
function! tlib#Object#New(...) "{{{3
return s:prototype.New(a:0 >= 1 ? a:1 : {})
endf
function! s:prototype.New(...) dict "{{{3
let object = deepcopy(self)
let s:id_counter += 1
let object._id = s:id_counter
if a:0 >= 1 && !empty(a:1)
" call object.Extend(deepcopy(a:1))
call object.Extend(a:1)
endif
return object
endf
function! s:prototype.Inherit(object) dict "{{{3
let class = copy(self._class)
" TLogVAR class
let objid = self._id
for c in get(a:object, '_class', [])
" TLogVAR c
if index(class, c) == -1
call add(class, c)
endif
endfor
call extend(self, a:object, 'keep')
let self._class = class
" TLogVAR self._class
let self._id = objid
" let self._super = [super] + self._super
call insert(self._super, a:object)
return self
endf
function! s:prototype.Extend(dictionary) dict "{{{3
let super = copy(self)
let class = copy(self._class)
" TLogVAR class
let objid = self._id
let thisclass = get(a:dictionary, '_class', [])
for c in type(thisclass) == 3 ? thisclass : [thisclass]
" TLogVAR c
if index(class, c) == -1
call add(class, c)
endif
endfor
call extend(self, a:dictionary)
let self._class = class
" TLogVAR self._class
let self._id = objid
" let self._super = [super] + self._super
call insert(self._super, super)
return self
endf
function! s:prototype.IsA(class) dict "{{{3
return index(self._class, a:class) != -1
endf
function! s:prototype.IsRelated(object) dict "{{{3
return len(filter(a:object._class, 'self.IsA(v:val)')) > 1
endf
function! s:prototype.RespondTo(name) dict "{{{3
" return has_key(self, a:name) && type(self[a:name]) == 2
return has_key(self, a:name)
endf
function! s:prototype.Super(method, arglist) dict "{{{3
for o in self._super
" TLogVAR o
if o.RespondTo(a:method)
" let self._tmp_method = o[a:method]
" TLogVAR self._tmp_method
" return call(self._tmp_method, a:arglist, self)
return call(o[a:method], a:arglist, self)
endif
endfor
echoerr 'tlib#Object: Does not respond to '. a:method .': '. string(self)
endf
function! s:prototype.Methods() dict "{{{3
let o = items(self)
call filter(o, 'type(v:val[1]) == 2 && string(v:val[1]) =~ "^function(''\\d\\+'')"')
let acc = {}
for e in o
let id = matchstr(string(e[1]), '\d\+')
let acc[id] = e[0]
endfor
return acc
endf
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