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.walk2(..) almost done...

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Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>
This commit is contained in:
Alex A. Naanou 2019-08-24 17:32:03 +03:00
parent f41791c810
commit 2bd7aa5c5b
1 changed files with 92 additions and 56 deletions
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148
ui (gen4)/lib/widget/browse2.js
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@ -1937,24 +1937,51 @@ var BaseBrowserPrototype = {
// {
// reverse: <bool>,
//
// // XXX ???
// //reverseCall: <bool>,
//
//
// iterateNonIterable: <bool>,
// iterateCollapsed: <bool>,
//
// // shorthand for:
// // iterateCollapsed: true, iterateNonIterable: true
// iterateAll: <bool>,
//
// // XXX ???
// //includeInlinedBlocks: <bool>,
//
//
// // list of sections to iterate...
// section: '*' | [ <section>, ... ],
//
// // list of iterable sections...
// //
// // used when options.section is '*'
// sections: [ <section>, ... ]
//
// ...
// }
//
//
// XXX add sections support...
// XXX add i and path handling...
// XXX revise func(..) return value semantics...
// should false be treated the same as null and undefined???
walk2: function(func, options){
var that = this
var [func, options={}, context={}] = [...arguments]
var [func, options={}, path=[], context={}] = [...arguments]
// context...
context.root = context.root || this
context.index = context.index || 0
// options...
options = Object.assign(
Object.create(this.options || {}),
options)
// options.reverse...
// XXX
var reverseCall = !!options.reverseCall
var handleReverse = function(lst){
return options.reverse ?
lst.slice().reverse()
@ -1969,13 +1996,11 @@ var BaseBrowserPrototype = {
&& sections.includes('items')) ?
['items']
: sections
// XXX iteration filtering...
var iterateNonIterable = options.iterateAll || options.iterateNonIterable
var iterateCollapsed = options.iterateAll || options.iterateCollapsed
// iteration filtering...
var iterateNonIterable = !!(options.iterateAll || options.iterateNonIterable)
var iterateCollapsed = !!(options.iterateAll || options.iterateCollapsed)
// XXX
var includeInlinedBlocks = !!options.includeInlinedBlocks
// stopping mechanics...
var res, StopException
@ -1987,59 +2012,70 @@ var BaseBrowserPrototype = {
.run(function(){
StopException = new Error('walk2(..): StopException.') })
// item handler generator...
var makeMap = function(path){
return function(elem){
var p = path
var children =
// skip collapsed...
(!iterateCollapsed && elem.collapsed) ?
[]
// inlined...
: (elem instanceof BaseBrowser
|| elem instanceof Array) ?
elem
// nested...
: (elem.children || [])
var next = function(elems){
children = elems == null ?
[]
: elems }
// handle item...
var item =
// skip non-iterable...
(!iterateNonIterable && elem.noniterable) ?
[]
: [(elem instanceof Array || elem instanceof BaseBrowser) ?
// skip inlined block items...
[]
: func.call(that, elem,
context.index++,
// NOTE: path will be updated ONLY for non-inlined items...
p = path.concat(elem.id),
next, stop) || []]
.flat()
return [
// item...
...!options.reverse ?
item
: [],
// children...
...children instanceof Array ?
handleReverse(children)
.map(makeMap(p))
.flat()
: children instanceof BaseBrowser ?
children
.walk2(func, options, p, context)
: [],
// item (in reverse)...
...options.reverse ?
item
: [], ] } }
// do the handling...
try {
var map
return handleReverse(
sections
.map(function(section){
return that[section] || [] })
.flat())
.map(map = function(elem){
// XXX
var i = 0
var path = []
var children = (elem instanceof BaseBrowser
|| elem instanceof Array) ?
elem
: (elem.children || [])
var next = function(elems){
children = elems == null ?
[]
: elems }
// handle item...
// XXX should func(..) be called before .children is handled
// in reverse mode???
var item =
[(elem instanceof Array || elem instanceof BaseBrowser) ?
// skip inlined block items...
[]
// XXX revise return value semantics...
// should false be treated the same as null and undefined???
: func.call(that, elem, i, path, next, stop) || []]
.flat()
return [
// item...
...!options.reverse ?
item
: [],
// children...
...children instanceof Array ?
handleReverse(children)
.map(map)
.flat()
: children instanceof BaseBrowser ?
// XXX add support for other handlers (???)
children
.walk2(func, options, context)
: [],
// item (in reverse)...
...options.reverse ?
item
: [], ] })
.map(makeMap(path))
.flat()
// handle StopException and errors...