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tweaking + docs...

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Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>
This commit is contained in:
Alex A. Naanou 2019-08-25 02:30:23 +03:00
parent c045d67a89
commit 20e6aed9c2
1 changed files with 46 additions and 25 deletions
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71
ui (gen4)/lib/widget/browse2.js
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@ -1931,38 +1931,49 @@ var BaseBrowserPrototype = {
// XXX EXPERIMENTAL -- an attempt to simplify walking...
// Walk the browser...
//
// .walk(func[, options])
// Get list of nodes...
// .walk()
// .walk(null[, options])
// -> list
//
// Walk the tree passing each elem to func(..)
// .walk(func(..)[, options])
// -> list
// -> res
//
//
// func(elem, i, path, next(..), stop(..))
// -> [item, ..]
// -> item
// Handle elem...
// func(elem, index, path, next(..), stop(..))
// -> [item, ..]
// -> item
//
//
// Ignore current .children...
// next()
// Ignore current .children...
// next()
//
// Explicitly pass the children to handle...
// next(browser)
// next([elem, ...])
// Explicitly pass children to be handled...
// next(browser)
// next([elem, ...])
//
//
// Stop walking (returning undefined)...
// stop()
// Stop walking (return undefined)...
// stop()
//
// Stop walking and return res...
// stop(res)
// Stop walking and return res...
// stop(res)
//
//
// If func(..) returns an array it's content is merged (.flat()) into
// .walk(..)'s return value, this enables it to:
// - return more than one value per item by returning an array of values
// - return no values for an item by returning []
//
// NOTE: to explicitly return an array wrap it in another array.
// NOTE: stop(..) breaks execution so nothing after it is called
// in the function will get reached.
// NOTE: if func(..) returns an array it's content is merged (.flat())
// into .walk(..)'s return value, this enables it to:
// - return more than one value per item by returning an
// array of values
// - return no values for an item by returning []
// NOTE: to explicitly return an array from func(..) wrap it in
// another array.
//
//
//
@ -2026,7 +2037,7 @@ var BaseBrowserPrototype = {
// children and return the result to the caller???
walk2: function(func, options){
var that = this
var [func, options={}, path=[], context={}] = [...arguments]
var [func=null, options={}, path=[], context={}] = [...arguments]
// context...
context.root = context.root || this
@ -2092,7 +2103,7 @@ var BaseBrowserPrototype = {
return (item =
item !== undefined ?
item
: !skipItem ?
: !skipItem && func ?
[ func.call(that, elem, context.index++, p, next, stop) ].flat()
: []) }
// pre-call the item if reverse is not 'full'...
@ -2155,10 +2166,18 @@ var BaseBrowserPrototype = {
// basic iteration...
map2: function(func, options){
var that = this
options = !(options || {}).defaultReverse ?
var args = [...arguments]
func = (args[0] instanceof Function
|| args[0] == null) ?
args.shift()
: undefined
// NOTE: we do not inherit options from this.options here is it
// will be done in .walk(..)
options = args.shift() || {}
options = !options.defaultReverse ?
Object.assign({},
options || {},
{ defaultReverse: 'full' })
options,
{ defaultReverse: 'flat' })
: options
return this.walk2(
function(e, i, p){
@ -2201,7 +2220,9 @@ var BaseBrowserPrototype = {
options || {},
{rawResults: true})) },
// XXX search(..), get(..), ...
// XXX
search2: function(){},
get2: function(){},