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 | Archive version of: rebol-dom.r ... version: 84 ... inetw3dm 13-Apr-2022Amendment note: Update: refactored setattribute,setattributevale, some(). getElementById and querySelecter can be used with the document.() as methods, wich will also return the .style[] object selector. Added "] [" "]|[" to rel-xprsn. You can code "foo[val1][val2] return 0" in {}, [], or <>. || Publicly available? Yes REBOL [
File: %rebol-dom.r
Date: 05-01-2021
Title: "Dialect Object Model"
Emai: inetw3.dm@gmail.com
author: daniel murrill
version: 1.0
Purpose: {
Use a exstensible Rebol Markup function to parse DSL's that will return an
easy to follow tagged key value Dialect Object Model that allow different DSL's,
programming languages to work with or together through a Central Processing
interpreter. Yes Rebol/Core. A demo example of a HTML DSL is parsed by
the Dialect Object Model to return valid HTML then processed by the %Mdlparser
wich in return creates UI VID code. All scripting takes place in the DOM and then
passed as VID code to Rebol/View. So instead of writing parse rules for DSL's, you
work with your DSL as a DOM and immediatley began to write code for it as if it's a
programming language.}
]
library: [
author: daniel murrill
level: 'intermediate
platform: 'all
type: [Dialects Markup]
domain: [html vid css json js array]
tested-under: 'windows
support: none
license: none
see-also: %Mdlparser.r
version: 1.0
]
my-dialect: [
rebol-DOM: [{DSL-type="html/block" type="text/html"}]
lua-tbl = {[first] = "fred", [last] = "cougar"}
#this-issue [{color: "purple" bgcolor: "orange"}]
var anObj = {`100: 'a', `2: 'b', `7: 'c', };
body: [{background-color="blue" text "white"} ]
p: [
{"color":"#0000ff", "bgcolor":"yellow", "width" : "399", "height" : "100" "font-styles": "big" }
This is an example of an Dialect Oject Model
b: [
{id="my-p1" color = "Chocolate" bgcolor = "yellow"}
that can be written to look like json' html' javascript arrays' css'
i: [
{color = "green"}
VID' or plain old rebol ]
]
if you like.
]
hr: [{color="red" bgcolor="yellow"}]
div: [
{width="399" bgcolor="orange"}
b: [
{color: "purple" bgcolor: "orange"}
Maybe it would be easier to write
i: [
{id="my-p1" color: "green"}
MakeDoc.r code but the purpose of this rebol DOM is']
]
]
p: [
{width "399" height= 200
style="color: red; bgcolor: brown; border: 2x2;"
}
b: [
{color="red"}
to read or load as many well known dialects of coding styles as possible
and write all of it as a single or seperate legible rebol series that's
quickly manipulated' transcoded as html' and viewed as a VID. ]
]
]
document.: func [request-as][
DOM: head DOM use*=*to-set-values
any [
all [not empty? data-node equal? block! type? data-node] insert data-node: []
any [attempt [strip-obj-chars-from request-as] request-as]]
any [equal? tag! type? node-element: data-node/1
attempt [node-element: build-tag to-block data-node/1]]
var .style: = node-element style: *![.style]
return node-element
]
document.getnodename: func [request][document. getnodename request]
.return-tag-node: does [DOM: head DOM
node: either any [attempt [empty? node-name] equal? word! type? node-name]
[either any [attempt [empty? node-element] none = node-element]
[data-node][node-element]][node-element]
any [
equal? tag! type? node-element: node
attempt [node-element: data-node: build-tag
to-block strip-obj-chars-from node none]
set 'node-element node]return node-element
]
.style: []
equal?: :=
DOM: DSL: html: window: end-tag: ""
data-node: parent-node: node: none
.body: .hr: .p: .b: .i: .tr: .ul: .li: .area: .table: .td: .button: .input: .div: .font: .span: 0
node-obj: node-element: node-name: *name: use-methods: attr-name: attr-value: none
check: func [select-this][return first parse trim strip-chars-from form select-this none " "]
elemt-chars: none
strip-chars-from: func [node-name elemt-chars][
foreach char elemt-chars: any [reduce elemt-chars
["<" ">" "{" "}" "(" ")" {"} "/" "." "[" "]" "," ":" ";" "," "=" "`"]
][
replace/all node-name char " "
]
]
obj-chars: none
strip-obj-chars-from: func [node-name obj-chars][
trim form node-name if equal? #"^"" node-name/1 [remove node-name]
foreach [-char +char] obj-chars: any [reduce obj-chars [#"^/" " "
" " " " {" , "} {" } {", "} {" } "," " " {" "} {" } {" : "} {: "}
{":"} {: "} {":} {:} { " } "" {"[["} {"[[" "} "{" "[" "}" "]" {""}
{"} { "} "" " : " ": " ":" " " { =} {=} {=} " " "'" "" "#" " "
"<" "" ">" "" "`" ""]
][
replace/all node-name -char +char
]
]
getnodename: func [node-name][data-node: []
DOM: head DOM =: :equal?
either block! = type? node-name [.return-tag-node][
node-name: to block! strip-chars-from form node-name none
count: any [attempt [count: pick find node-name integer! 1]1]
nodename: to-word join "." array-obj!: node-name/1
any [attempt [repeat ? count [data-node: first DOM: next node: find DOM nodename]]
print rejoin [{node-name: (} node-name/1 "." count ") not found."]
]
slf*: join node-name/1 count
]
if " " = data-node [data-node: form first DOM: next DOM]
return either tag! = type? data-node/1 [node-element: data-node/1][node-element: data-node]
]
setnodename: func [old-name new-name][
any [equal? this-name: check old-name check node-element getnodename old-name]
any [equal? none not find node-element new-name try [
replace node-element to string! this-name new-name
replace data-node to-tag join "/" this-name to-tag join "/" new-name]
]
]
getattribute: func [attr-name][
attr-value: none attr-value: array-obj!(attr-name)
print any [[attr-name attr-value]
["node-attribute:" mold form attr-name "not found"]
]
]
setattribute: func [attr-name new-attr][
*key: *value: none .style: any [:.style :array-obj!] .style(attr-name )
any [
if *value [replace node-element attr-name new-attr]
| [repend [" " new-attr {="}'undefined{"}]]
print ["Must get a parent-node with this attribute: " attr-name]]
;get-attributes node-element attempt [set-attributes]
]
setattributevalue: func [attr-name attr-value][
*key: *value: none .style: any [:.style :array-obj!] .style(attr-name)
any [
if *value [`=(attr-value)]
| [repend [" " attr-name {="}attr-value {"}]""]
print ["Must get a parent-node with this attribute: " attr-name]
] ;get-attributes node-element attempt [set-attributes]
]
getElementByTagName: func [Tag-Name selection [block!]][
dom: head dom
repeat this first selection [
node-element: first data-node: first dom: next find dom to-word join "." Tag-Name]
if all [equal? true use-methods not find node-element " ."][use-attr-as-methods yes]
use-methods: off
]
look-deep-for: func [this in-node][
foreach in-child-node in-node [
if all [tag! = type? child: in-child-node find/any child this][
insert data-node: [] node print node-element: child]
if block! = type? node: in-child-node [look-deep-for this in-child-node]
]
]
getElementById: func [my-id][in-child-node: none
id: copy join "id*" form my-id =: :equal?
foreach in-parent-node dom [
if block! = type? node: in-parent-node [look-deep-for id in-parent-node
]]
]
querySelecter: func [css-Selecter][in-child-node: none
id: rejoin [css-Selecter "*"] =: :equal?
foreach in-parent-node dom [
if block! = type? node: in-parent-node [look-deep-for id in-parent-node
]]
]
.innerHTML: func [element][
children: copy/part next data-node find/last data-node tag!
either equal? tag! type? node-element [
any [empty? element replace data-node children element]
][print "The node-element has no innerHTML"]
]
use*=*to-set-values: does [=: func [value][any [value]]]
use-attr-as-methods: func [maybe [logic!]][
if false != maybe [foreach [-char +char][{" } {" .} ".." "."][replace/all node-element -char +char]
]
replace node-element " " " ."
use-methods: no
]
node-list: []
*!: func [new-var][set to-set-word node-name set to-set-word form new-var :array-obj!]
proto-type: func [node-obj new-name][
old-name: check node-element
var replace copy head node-obj
old-name new-name
]
var: func [var-data][node-element: variable: ""
any [
attempt [variable: first parse node-element: var-data "=:, "]
attempt [if equal? block! type? var-data [variable: first node-element: var-data]]
attempt [variable: var-data node-element: ""]
]
use*=*to-set-values node-name: variable: to-string variable
either empty? node-element [any [find node-list variable append node-list reduce
[variable node-element: any [attempt [do :variable] " "]]]]
[append node-list reduce [form variable node-element]]
set to-word variable array-obj!: func [key] node: compose/deep copy get-array-obj!
attempt [if not find variable "." [do load to-string reduce ["set " #"'" variable ". :array-obj!"]]]
use-methods: off ()
]
return.: func [value][
any [
attempt [*value: to-block value
foreach a *value [if not equal? word! type? a [do *value: a ]]]
attempt [*value: do form reduce load value]
]
]
.: func [value][either equal? block! type? *value [
any [
if equal? integer! type? *key: first to-block value [
any [equal? 1 *key *key: *key + *key - 1]
attempt [do [value: select *value *key: pick *value *key *value: to-block value]]]
attempt [*value: first next *value: find *value value]
attempt [*value: load value] ]
][ do compose/deep reduce [*value [(load value)]]]
]
some: func [next-key][
foreach try-this next-key [
| try-this either *value [
print ["*key: " *key " *value: " *value: form *value ]
][
attempt [do try-this]] key: any [*key try-this]()
]
]
get-array-obj!: [
node-element: select node-list (form variable)
|: :array-obj!
all [
not find node-element {='} inline: find/any node-element {style*=}
replace node-element inline
replace/all replace replace inline {"} "{" {"} "}" " " ": "]
if not find form node-element "1:" [all [(length? parse form node-element ":= ,") < 2
insert node-element [#1:]]]
any [
if empty? form key [
return any [
if equal? tag! type? node-element [node-element]
attempt [trim find/tail copy head node-element first parse node-element " ,"]
node-element]*key: key: *value: value: none
]
if all [*key: first to-block key not find node-element rejoin [" " *key " "]
equal? integer! type? *key][
values: any [attempt [parse head node-element "<=;,`#: []>"]
load strip-obj-chars-from mold node-element none]
keys: length? replace/all values [""][]
if odd? length? values [remove values]
any [equal? 1 *key *key: *key + *key - 1]
*value: any [*value: select values *key: pick values *key *value ]
if *value [print ["*key:" *key " *value: " *value: *value ]]
node-name: keys: value: none *key: *value: none
]
if equal? path! type? key[]
if equal? refinement! type? key[attempt [do replace/all form key "." "/."]]
if find ["url!" "email!" "tag!" "refinement!"] mold type? key [
attempt [key: to-string parse replace/all to-string key "." "/." "/"]
foreach [-char +char][":" ":." "@" ":" ".." "."][replace/all key -char +char]
replace/all from-method: parse key ".:" ":" []
*value: from-method/1
foreach key from-method [any [*value: | to-block key . to-block key]]
]
any [
attempt [*value: load select/case parse strip-obj-chars-from copy node-element none none
*key: trim head trim tail form key]
attempt [*value: select/case load strip-obj-chars-from mold to-block node-element none key]]
any [
attempt [do head append insert next copy key [node-element join] ""]
attempt [if equal? string! type? key [do head replace copy key " " { node-element }]]]
attempt [do load key] attempt [*get-methods key] attempt [do *get-expressions key none]
if not find node-element key [*key: *value: none]] ;[print [*key "called"]]
]
rel-xprsn: to-hash [" " " " "*va" "-va" " ." "_$" "." " #" { = "} {:== "} {: "} ":::" " *" " set '" "};" {%>"} "] [" "]|["
"}}" "},}" "}," {%>"} "," " " ": " " 1 `= " ":::" {: "} {- "} {- ."} " = " " `= " " {" " .{"
" ${" { build-markup "<%} "* " "[] " "()" {("")} "==" " =" "function " "function '" "_$" " ."
"var " "var '" "-va" "*va" "= ." "= " ": ." ": " " #log" ".log" "&" ""]
*get-expressions: func[this expressions][
attempt [find this "return 0"
this: mold this
strip-obj-chars-from this [{."} {"-} "1." "1-" "2." "2-" "3." "3-" "4." "4-" "5." "5-"
"6." "6-" "7." "7-" "8." "8-" "9." "9-" "0." "0-" "\." "~escp"]
strip-obj-chars-from this expressions: any [expressions rel-xprsn]
strip-obj-chars-from this [{"-} {."} "1-" "1." "2-" "2." "3-" "3." "4-" "4." "5-" "5."
"6-" "6." "7-" "7." "8-" "8." "9-" "9." "0-" "0." "~escp" "."]
all [
;| is exspressive, using Do won't eval sequence methods but is simpler and faster.
attempt [| reduce . this]
]]
]
*get-methods: func[this][
attempt [
this: mold this
if not find this: next find this "." "return 0" [
| this: do strip-obj-chars-from head this [
"[" "" "]" "" "." "@" {"} "" "ame@" "ame join form '"
"ent@" "ent. " "&" { join " " } "=" { join " " }]]
]
]
`=: func[attr-value][
any [
attempt [replace node-element *value *value: do load form attr-value]
replace node-element form *value form *value: attr-value
replace node-element mold form *value mold *value: attr-value
attempt [*value: select node-element *key: load key]
] node-element: head node-element
]
node-element: *node-name: *name: array-obj!: key: *key: *value: ""
markup-DOM: func [DSL][
use-methods: string-is-data: no =: :equal?
either block! = this-type?: type? DSL [
DOM: copy/deep DSL: load replace/all replace/all mold DSL "__" " " {=""} {="undefined"}
any [
find DSL [rebol-DOM: [{DSL-type="html/block" type="text/html"}]]
insert DSL [rebol-DOM: [{DSL-type="html/block" type="text/html"}]]]
get-data: func [data][
find-end-tag: find data get-word!
either find-end-tag [
replace data first find-end-tag to-tag mold to-refinement first find-end-tag
][
insert tail data to-tag join "/" any [*name *node-name]*name: none
]
repeat in-data data [
if set-word! = type? in-data [*node-name: copy form in-data
replace data in-data node-name: to-word join "." *node-name
]
if string! = type? in-data [
foreach key-value [{:*"}{:*:*}{="}{=*=}][either find/any in-data key-value[
strip-obj-chars-from in-data none
insert in-data next reform [node-name " "]
child: build-tag to-block in-data
foreach [a b][{=" } "={" {" "} "*}" "*" {"}][replace/all child a b]
replace data in-data child][]]
]
if block! = type? in-data [
get-next in-data
]
]
]
get-next: func [in-data][
repeat data in-data [
if set-word! = type? data [*name: copy form data
replace in-data data node-name: to-word join "." *name
]
if string! = type? data [
foreach key-value [{:*"}{:*:*}{="}{=*=}][either find/any data key-value[
created-data: copy data
strip-obj-chars-from created-data none
insert created-data reduce [node-name " "]
child: build-tag to-block remove created-data
foreach [a b][{=" } "={" {" "} "*}" "*" {"}][replace/all child a b]
replace in-data data child][]]
]
if block! = type? data [get-data data set to-word *node-name data]
]
find-end-tag: find in-data get-word!
either find-end-tag[
replace in-data first find-end-tag to-tag mold to-refinement first find-end-tag
][
insert tail in-data to-tag join "/" any [*node-name *name] *node-name: none
]
]
repeat with-this-data DSL [
if issue! = type? with-this-data [
node-name: to-word join "." *name: copy form with-this-data
]
if set-word! = type? with-this-data [
replace DSL with-this-data node-name: to-word join "." *name: copy form with-this-data
]
if word! = type? with-this-data [
either '= = with-this-data [string-is-data: yes replace DSL with-this-data ""
][
*name: copy form with-this-data
replace DSL with-this-data node-name: to-word join "." with-this-data]
replace DSL reduce [node-name node-name] node-name
]
if string! = type? with-this-data [
either string-is-data [
replace DSL with-this-data rejoin [node-name " " with-this-data]
][
foreach key-value [{:*"}{:*:*}{="}{=*=}][either find/any with-this-data key-value[
created-data: copy with-this-data
strip-obj-chars-from created-data none
insert created-data reduce [node-name " "]
child: build-tag to-block remove created-data
foreach [a b][{=" } "={" {" "} "*}" "*" {"}][replace/all child a b]
replace DSL with-this-data child][]]
]
string-is-data: no
]
if block! = type? with-this-data [
get-data with-this-data
]
if get-word! = type? with-this-data [
replace DSL with-this-data to-tag mold to-refinement *name
]
]
replace/all dsl "" [] DOM: copy DSL
][
view center-face layout [
backcolor black space 8
across
h3 yellow "Need a Dialect Object Model as type! block"
return
text gray "Your DSL type is: " text red bold form :this-type?
return
text gray "Some DOM functions will not work properly"]
]
]
format-this: func [node-element with-these-chars][
strip-obj-chars-from node-element with-these-chars
do last with-these-chars
]
as-js-object!: [
{ #} ""
{="} {: "} "={" ": {" {""} {"} {" } {", } {", "} {","}
[if equal? tag! type? node-element [replace node-element " " ": {"]
strip-obj-chars-from node-element [ { "} {: "} "::" ":" " : " ": "]
append node-element "}"
]
]
.as-js-object: does [format-this node-element as-js-object!]
clear-node-list: does [foreach [var node] node-list [set to-set-word var none]clear node-list]
return-html-dsl: does [
html: copy form any [find head DOM "<body" head DOM]
strip-obj-chars-from html ["<." "<" "' " ", " "{" "<" "}" ">"]
strip-chars-from html [
".body " ".hr " ".p " ".b " ".i " ".? "
".tr " ".table " ".td " ".button " ".input "
".div " ".ul " ".li " ".font " ".span "
".img " ".a " ".strong " " ." ".hr " "lua-tbl "
</body>]
append html </body>
html: any [find html "<body" html]
]
probe markup-DOM my-dialect
getElementById 'my-p1
querySelecter 'border
var <.div 1=div.1 width=none bgcolor=none> ;create node-element with a set builder notation.
var document.getnodename(.div[1]) ;Use SBN. to get node-element from DOM.
;lets play with our div[] and .div[]
.style[div.bgcolor]`= red
;The documents div[1] node-element now can call/update the Var .div[] properties with update.div
update.div: [
*w div.width .div.width = &w
*bg div.bgcolor .div.bgcolor = &bg
print {"the width is" ${w}, "the bgcolor is" ${bg};}
return 0
]
div(update.div)
.div[width]
.div[bgcolor]
div[width] `= 1000
div[bgcolor]`="green" div(update.div)
.div[]
div[]
document.getnodename{("p")[2]} .style[width] `= "block-build"
setattributevalue('height) "1000"
node-element
getattribute "height"
setnodename {hr[1]} "listview"
node-element
document.getnodename{("p")[1]}.style[font-styles] `= "block-build"
setattribute('font-styles)"whithouse"
node-element
setattributevalue('boogies)"green-color"
node-element
data-node: do to-path [DOM .p .b]
document.(data-node).style[color] `= "bluberry"
setattribute('i-style) "silly"
node-element
; Some examples of selecting keys and values set to Sequence variables as an array object.
; good to use with anything that's structured with {} , or "". It also can be used with [].
;IE (javascript, json objects/arrays.. lua table/arrays.. associative arrays etc.)
;even DOM's and rebol data.
;The insert, remove, append, and lookup of a group (a node-element) by way of a Var (variable)
;is done as a data-node and syntactically as an associative array. The associattion of key
;values is done by index in Rebol therefore there is no need for the overhead of objects or
;multi.dim arrays. But the cool part is you can do what ever you like!
;You must use use*=*to-set-values before setting the first variable.
;it will use = to set any value to a variable (a set-word)
;`= this literal equal is used to set values to keys. Feel free to use
;different function symbols for any !op function.
use*=*to-set-values
;variables and there values (node-elements) are sent and fetched from a
;node-list block for demo purposes. They will be appended to the DOM later.
;The variable name and the first word in it's value must be the same in order for
;the variable to be automatically bound to the node-element and array-obj!() function.
var hello: = {hello 100: "a" 2: "two words" 7="c"}
hello[2]
hello[2] `= "a to z"
node-element
;if you use *use-methods: yes, use paths or refinements, /style.bgcolor
;to get the value. Not implemented: may not be needed.
;use-methods: yes
app: = document.(getElementByTagName('p)[2]).style[bgcolor]`="green"
p .innerHTML("Lets change this, shall we.")
data-node
;You must call/associate the array-obj! with this variable name
;because the variable name "app" and the node-name/TagName "p"
;are not the same.
;Don't call/associate and just use the set node-name/TagName "p"
p.[bgcolor]
;call/associate
*![app]
p[]
;or app: :array-obj!
;the style.obj! is auto created by using the document. function
.style{bgcolor}
;is the same as calling, but without any block/parenths this time.
app 'bgcolor
use*=*to-set-values
var choose: = {choose red: 250.0.0 green: 0.250.0 yellow: 250.250.0}
app[bgcolor]`= "'yellows" ;set as word with {'}
app[bgcolor]`= 0.0.5
;or replace/all of apps "yellows"
strip-obj-chars-from app[] ["yellows" 0.0.5]
;This is a relative exspession. it makes the for in, switch,case,if,
;looping, find, nesting, and temp variables to keep up with found
;values unnecessary. The "=" is not is-equal?. it's denotes a set word.
;The set (set-word "app") of all x ("with its array sequence properties")
;can evaluate its value such that x method is tupple.
app = [choose.yellow = 15.56.10] ;you don't need the "=" to eval the value.
choose[yellow]
me: *value
app "bgcolor" `= *value + me
app = "width" ;you don't need the "=" to eval the value.
app = "whithouse"
app "height"
;scripting the Var in place.
node-element
replace-each: :strip-obj-chars-from
app = {replace-each app* ["border" 'boundery "bgcolor" 'back-color] return 0}
app[]
app ("bgcolor") `= to-string [purple]
;when you need to create a variable to use with an array-obj!
poppy: [#100: "a" street: "backside" #7="c"]
;Sequence set builder notations without the Set word/name, ie..(poppy)
;should start with a space. " " , ": ", or "|".
poppy: {: 100: "a" street : "backside" 7="c"}
var 'poppy
;Local or global hoisting. the set-word is added to the series/sequence
;name-space, node-name/slot position. ;Quick way to use normal rebol
;blocks as Var's.
poppy[]
var join {poppy2} {: 200:"a" street : "backside" 7="c"}
poppy2[]
poppy[street]`="old rover rd."
poppy["7"] `= "cities"
;You do not need a variable word. If you apply Var to your
;value, the variable will always be the first word found in
;the value (node-element) followed by ": =", " =", ": ", or " "
;you can allso access it with array-obj![] or |.
var {
new-var:
1: a
2: b
3: c
}
new-var[1]
var <new-var: 1: a 2: b 3: c> ;tags are allways node-elements.
new-var[2]
;VAR values can also be set to an arrayed object.
var poppy3: = [poppy3 #100:"a" #3:"c" street: "backside"]
;Even though it's not the best idea to use integers as keys, you can.
;it can encourage mistakes when trying to get by index... poppy2[3]
;But this is Rebol, so we will roll with this...
;You must always start block cell number keys with the pound sign. "#"
;if it's written as a set-word! ie, 7: "some-value", if not it will error
;It reminds you there's an issue with that key. becarfull
poppy3[street]`= "old rover rd."
poppy3[3]`= "cities"
;First it looks for any 3rd index key/value but then it
;returns any set-word! #issue keys' *value if it exists.
*value
poppy3[100]
;WHY do this then? you can set your own index numbers, starting
;at 0 or 1, in or out of order, as lua does with its table structure
;where some can be numbered keys mixed with normal keys/values.
;DOM variables are renamed to start with a dot "." so not to be confused with words.
;this may not change in the future. For now only DOM/parent-nodes can be type! word.
;Only Var type! set-word!'s can not be nested.
;Remember when calling a node-name or a tag! type node-element
;from the DOM, and using that name as the variable,
var .anObj: = getnodename "anobj"
;you dont have to call/associate the array-obj! with this variable name
;but the variable name must began with a dot. IE "."
.anobj["7"]
;but with
var anObj: = getnodename "anobj".return-tag-node
;you do
*![anObj] ;or anObj: :array-obj!
anobj["7"]
;quick short parsing example of the node-element sequence.
;it,s not just top down, it's start and stop anywhere, with any
;repeat and backtracking, moving into or out of Vars and prototypes,
;code, and data by reference, linked or not.
this: [all [find node-element key print .{"I got the key " key}]]
in-node-element?: [any [all [find node-element key print .{key " In node-element"}]
print .{key " not In node-element"}]]
.anobj[] some [
flys: in-node-element?
#100 this
#7 in-node-element?
people: in-node-element?
]
;after calling some variable[key]/array-obj![key], you can replace the key and value.
replace replace node-element *key 'this-key *value {some-value}
;Lets create a Var string node with one element
var {
try-that:
width: 50px
}
try-that[]
;lets use this string node as prototype Object.
new: :copy
;var new try-that[] *![try-this]
proto-type try-that[return] 'try-this
;lets give it a new key element.
setattribute try-this[key][size]
node-element
;give that key a value
try-this[size]`= #200px
;While the string node-element *try-that[] did'nt change
try-that[]
try-this[.innerHTML("change me please") ","]
head try-this[]
;a roadmap for javascripting with the Dialect Object Model (DOM).
;A quick way to change op! functions between rebol and javascript.
js-op!: does [x: :* *: :do console.log: :print var 'use js-do: :js-op!]
reb-op!: does [*: :x =: :equal? reb-do: :reb-op!]
;This code...
{
function welcomeSite() {
siteMessage = "Welcome to the...";
Message-type: "Welcome"
console.log(siteMessage);
var siteMessage;
}
welcomeSite();
siteMessage.append("Rebolution") siteMessage
}
;Is changed to this code...
js-op!
function: func [fn params this-data][var rejoin [fn " " *get-expressions this-data none]]
function 'welcomeSite("") {
siteMessage = "Welcome to the\.\.\. "
Message-type: "Welcome"
do reb-op! alert(siteMessage)
console.log(siteMessage);
var siteMessage; return 0
};
;Hey you can load welcomeSite from a DOM or files with variables, functions, key-values or Rebol code:
use[welcomeSite()];
;to use the welcomeSite Message-type in your code.
js-do
*{
var say-hi-to: = Message-type
console.log(["This is a message to" say-hi-to "you."]);
}
siteMessage.{append("Rebolution.")} siteMessage.[print]
var first-obj: = {first-obj: first-name: "Brigsby" last-name: "Backfort"}
var second-obj: = {second-obj: first-name: "Krystal" last-name: "Frontbunker"}
first-obj[last-name]`="FortBack" first-obj[]
second-obj[last-name]`="Bunkerfront" second-obj[]
Var contacts: = {Bestfriend: "[{"first": "Besty", "last": "Bestest", "number": 777-9211}]"}
Bestfriend[first]
*![contacts]
contacts[last]
;Does Var persist if not destroyed? YES.
first-obj[]
;and then back to Rebol
reb-do 2 * 2
clear-node-list
;Create a DOM from a nested javascript object DSL, search and update.
;A return-js-object-dsl() function will return the new js-object.
;Mold blocks and load strings to do quick formating like remove all ",".
markup-DOM load strip-chars-from {data: [
fullName: {fullName: "James Zhan"},
address: {
city: "Shenzhen",
state: {
name: "Guangdone",
abbr: "CN""
},
country: {
local-name,Guangdone,abbr,CNN,id,jazzy}, ;CSV example.
},
hobbies: ["coding", "reading"],
projects: [
{ name: "form2json", language: "javascript", popular: true },
{ name: "peony", language: "ruby" }
]
]
} ","
getElementById("jazzy").as-js-object
var here: dom/.data/.projects/1
*![here]
here[name]`="funkacopics"
format-this node-element as-js-object!
;using paths to get node-elements
var address: dom/.data/.address
;using nested indexing by keys to get/set node-element values
address[state]
.[country]
.[abbr]
`= "pop" ;
;this sets correct value even though .[country]'s not in [state].
clear node-list
use*=*to-set-values
;And a cool but very simple trick in Rebol. For non-rebolers
;this IS code and data mixed together. First it's ALL string data.
var num: {num: a: 1 b: 2 c: 3}
;Rember, the *num value is a string, not an object.
amount: num[a]`= [amount '+ 15]
;And the new *formed() value is a [string: "1" word: '+ integer: 15]
;The DO() function binds each piece to a Rebol system symbols/funcs table, and voila!
num[a]
;And now Var methods with linked node-element lists, a mixture of object and arrays
;in a simple DSL keeping track of data updates with set limits. Don't try to undestand
;it, it's silly.
;methods are written as messages sending or recieving. So lets use a form of
;urls and emails.
;/*
get-numbers.has-a@variable-a ;or
get-numbers:has-a.variable-a ; cause theres a set-word in there.
get-numbers.has-a.variable-a@
;*/
;all methods must either start with "/", {'}, 1st word as a set-word or "@" appended
;somewhere or at the tail to be a valid Var methods.
;if the word to start the method is a set-word *get-numbers:
;the words to continue the method can each have "@" appended to them.
;/*get-numbers:has-a@variable-a@*/
;they will be looked up as Var words or set-words or else there
;is no vectoring/linking.
;Yes if it's a string sequence word, it will be given local context.
;The string word will be matched as a pointer to it's literal word
;to return the correct Var or local value.
;Sequence comments must either be removed from node-elements
;in order to select keys by index number. Try writting them as "comment: ..."
;key/value pairs, or leave them in if you just care about getting keys by name.
clear node-list
var check-if: = [
check-if start: 'at-head
stop: 'at-tail
get-numbers: numbers ;this is linked to local Var numbers
]
var numbers: {
numbers:
start-at: 1
has-a: limit ;this is linked to local Var limit
me: [a: "b" c: {d: "go-it"}] ;nest array objects with "{}" or "[]".
}
numbers[me].[c].[d]
var limit: = {
variable-a: "yes"
info: "I am a returned method" ;using ancester Var to get info:
variable-b: [function!(js-op!){console.log[(variable-a"info")]reb-op!}]
} *![limit]
limit[variable-b]
numbers[start-at]
amount: numbers{start-at} `= {amount + 15}
;don't create a vaviable (*amount) to GC.
*value
numbers{start-at} `= {*value + 15}
increased: "start-at"
;Returning a linked var's value with *do instead of (chaining) using .[] or .{}
do check-if 'get-numbers increased ;use ":" , "@" or "/" with key/values as metods.
do check-if [get-numbers](increased)
do check-if ('get-numbers){increased}
;or
question?: :? ?: :if then: :.
check-if 'get-numbers all [
?(.[increased]) then {
`= money: $50.00
print .{"....... Yep it" *key "up to" *value}
}
?(numbers[me].[c].[d]).{
print ."'I *value {, that cash you owed me. the} money"
}
?: :question?
]
;Using .[] or .{} to load the last known variable and retun its node-element
check-if(get-numbers.has-a.variable-a@)do .{
; this set attribute and value is appended to the last evaluated Var, Limit[].
setattributevalue "last-variable" "value-off"
.as-js-object
}
;/*place *fetch, "@" before or after any key. use it in place of the set/get-word #":"
check-if get-numbers.has-a.variable-a@
;*/
;When "variable-a:" is found in Var limit[]'s namespace position with following data,
;its used as the Var name . Now we can use it as a stand alone method caller.
variable-a[variable-b] ;with any array object data.
;Let's send get-numbers:has-a.variable-a data, wich is "yes" to /*daniel@mindsping.com*/
daniel: "get-numbers@"
mindsping: "has-a"
.com: ".variable-a"
send /*daniel@mindsping.com check-if daniel@mindsping.com*/
;the node-element is now *limit[]
=: :equal?
if (numbers has-a.variable-b@) .{
print "this worked"
}
if!: :either then: else: :. ;or just use either
if! 16 = numbers<start-at> .{
print "yessers"
} else {
print "nossers"
}
setattributevalue 'reset 'check-if
limit[reset].[stop]
;This is a quick get by index example
;on strings, using parse and select
;The same string value, ie. node-element
;key can be selected by *key or index now.
check-if[6]
check-if[1]
check-if[2]
;get nested elements *values by index numbers.
;if Rebol style comments are in node-element, this
;will not allways work properly.
numbers[me].[2].[1] ;same as [me][c][d]
;You can use any ancestor Var, (ie. variable-a)
;in a Var method (ie. variable-b) to return a *value.
return.(limit 'variable-b) ;or
return.(limit{variable-b}) ;or
return. limit[variable-b] ;or
return. limit"variable-b"
use*=*to-set-values
var age: "$user.age" ;single element values are given an index as [#1:].
*![age]
age[]
clear-node-list
reb-do 2 * 2
;Ason script DOM example...
probe markup-DOM [user-database: [
name: {name1:"John Smith"} ;values with spaces must be wrapped with name space.
age: 22
born: 1998-8-15
usage: #8:22:45
email: %jsmith--altscript--com
website: http://altscript.com
version: 3.2.14
passhash: #A94A8FE5CCB19BA6
colors: [ 255.100.50 50.50.80 ]
allow: [ login admin upload edit ]
check: [ if age > 60 [ add-to people.seniors ]]
;/*... more users ...*/
]
]
var dom/.user-database/.name ;get that name!
name[] ;use "name.", "name" | or array-obj!
name ""
name 1
name(1)
name[1]
name([]) ;The purpose: DSL syntax styling.
name [name1]
name {name1}
name ("name1")
name </name.name1>
name /dom.user-database.name
array-obj![] ;use ".", array-obj!, name., "name" or |
array-obj![name1]
array-obj! /name.name1
array-obj! name:name1
array-obj! name.name1@ data-node: []
use*=*to-set-values
;Very quick, easy, short demo scripting DOM node-elements.
var {x: yellow: 250.250.0 1: 10 2: 20} ;[] can be used in place of {}, "", <>, or these inside of ().
x.{find "10"}
x.{replace "10" "30"}
var y: = "15" *![y]
;Lets make a quick relative expression that evals sequences and return a statement.
;Lets use Var X and Y.
x = {
x.yellow = 20 + 20, print {"x[2] is now" *value}
y: 15 - 3, print {"y is now" *value}
x.1 = 100 + 200 print {"x[1] is now" *value}
return 0
}
;the node-elemnt is reduced.
probe node-element
;Control duplicate key injection attacks due to
;different json/map encoding preferences for
;selecting first key but duplicate key is returned
;through decoding and shares an illegal value.
clear-node-list
;Or use sequences as array,object, and blocks.
var {x: #1: 10 #1: 50 #2: 20}
of: create_key_*value: :.
if found? all of {
key1: x.{find/any {#1:*#1*}}
key2: x.{find {#1: 50}}
} create_key_*value {
x.[1]`= 30
print add *value pick load maximum key1 key2 2
}
;A method is just putting the name of a Var in another Var as a key's value.
;None of the Vars need to share data structures, but can be linked, or put in a
;Var as *values with your *key variable names. Although it's a linked list all
;data structures are traversed and accessed individually. Thank you Rebol.
;You don't need objects, parsers, classes, or tricked out functions to use your
;DSL's. To start you just look up or set everything by key value pairs.
;methods are just a quicker way to get to local associated data.Notes
|