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cleanup...

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Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>
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Alex A. Naanou 2016-06-27 20:04:14 +03:00
parent 617c2d3dec
commit 635298aeac
1 changed files with 0 additions and 324 deletions
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ui (gen4)/lib/features.js
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@ -248,330 +248,6 @@ var FeatureSetProto = {
&& that[e] instanceof Feature }) && that[e] instanceof Feature })
}, },
/*
// Build feature list...
//
// Build a list of all registered features
// .buildFeatureList()
// .buildFeatureList(actions)
// -> list
//
// Build a list of given features
// .buildFeatureList(null, list)
// .buildFeatureList(actions, list)
// -> list
//
//
// NOTE: some feature .isApplicable(..) may expect the action set thus
// making it required for building a feature list.
// NOTE: this will try and keep the order as close as possible to the
// original as possible, this if the list is correctly ordered
// it will not be affected...
// NOTE: this will fix most dependency ordering errors except for two:
// - cyclic dependencies
// e.g. a -> b and b -> a, here there is no way to reorder
// a and b to resolve this.
// - dependency / priority conflict
// e.g. a -> b but a has a higher priority that b thus
// making it impossible to order the two without
// breaking either the dependency or priority ordering.
//
//
// Forcing a feature disabled:
//
// If a feature is indicated with a leading '-' then it is forced
// disabled and will not load.
// Disabled features are treated in the same way as inaplicable
// features.
//
//
// Dependency sorting:
//
// These are order dependencies, i.e. for a dependency to be
// resolved it must satisfy ALL of the folowing:
// - all dependencies must exist in the list.
// - all dependencies must be positiond/setup before the dependant.
//
// The general algorithm is as folows:
// 1) place the dependencies befeore the dependant for each element
// 2) remove the duplicate features except fot the first occurance
// 3) repeat 1 and 2 for 2 to depth times or until the feature list
// stabelizes, i.e. no new features are added on the last run.
//
// NOTE: if auto_include is true (default) this will add dependencies
// as they are needed...
// This is useful for "meta-features" that do nothing other than
// depend/include sets of other features, for exmale: 'ui',
// 'core', 'browser', ...etc.
// NOTE: dependency chains larger than depth will be dropped, this
// can be fixed by setting a greater depth (default: 8)...
// NOTE: conflicts that can occur and can not be recovered from:
// - cyclic dependency
// X will be before one of its dependencies...
// - dependency / priority conflict
// X will have higher priority than one of its dependencies...
// NOTE: feature that depend in unapplicable features are considered
// unapplicable.
// XXX not sure if this is 100% correct...
// NOTE: child high priority features will push their dependencies up
// to precede them.
// ...this will not resolve all the possible conflicts so be
// careful.
//
// XXX make suggested feature expansion recursive...
// XXX this appears to be very slow if lst not passed...
// XXX add ability to remove features by prefixing a '-' to its name
// ...if one -<feature> is present, remove all instances of
// <feature>
// XXX .buildFeatureList() is slow and can be a bottleneck for large
// numbers of features... might be a good idea to take a look at
// this sometime...
_buildFeatureList: function(obj, lst, auto_include, depth){
var that = this
obj = obj || {}
lst = lst == null ? this.features : lst
lst = lst.constructor !== Array ? [lst] : lst
auto_include = auto_include == null ? true : false
depth = depth || 8
var missing = {}
// helpers...
// NOTE: _skipMissing(..) will add missing dependencies to missing...
var _skipMissing = function(feature, deps, missing){
return deps.filter(function(d){
if(lst.indexOf(d) < 0){
missing[d] = missing[d] != null ? missing[d] : []
if(missing[d].indexOf(feature) < 0){
missing[d].push(feature)
}
}
return missing[d] == null
})
}
var _sortDep = function(lst, missing, depth){
do {
var res = []
var l = lst.length
lst.forEach(function(n){
var e = that[n]
if(!e){
//console.warn('%s: feature is not loaded.', n)
// XXX should we break here???
throw (n + ': feature is not loaded.')
// no dependencies...
} else if(e.depends == null || e.depends.length == 0){
res.push(n)
} else {
// auto-include dependencies...
if(auto_include){
var deps = e.depends
// skip dependencies that are not in list...
} else {
var deps = _skipMissing(n, e.depends, missing)
}
// place dependencies before the depended...
res = res.concat(deps)
res.push(n)
}
})
lst = res
depth -= 1
} while(lst.length != l && depth > 0)
return lst
}
var _getSuggested = function(featureset, feature, suggested, missing){
suggested = suggested || []
var s = (feature.suggested || [])
s
// remove the already visited suggenstions...
.filter(function(e){ return suggested.indexOf(e) < 0 })
// add unloaded features to missing...
.filter(function(e){
if(featureset[e] == null){
missing[e] = missing[e] != null ? missing[e] : []
if(missing[e].indexOf(feature.tag) < 0){
missing[e].push(feature.tag)
}
return false
}
return true
})
// load new suggenstions...
.forEach(function(n){
var e = featureset[n]
if(e != null && e.suggested != null){
suggested = suggested
.concat(_getSuggested(featureset, e, suggested, missing))
.unique()
}
suggested.push(n)
})
return suggested
}
// expand optional "suggested" features...
// XXX make this recursive...
var res = []
lst.forEach(function(n){
var e = that[n]
if(e != null && e.suggested != null){
//res = res.concat(e.suggested)
res = res.concat(_getSuggested(that, e, res, missing))
}
res.push(n)
})
lst = res
// expand and sort dependencies...
// 2+ times untill depth is 0 or length stabelizes...
lst = _sortDep(lst, missing, depth).unique()
// sort features via priority keeping the order as close to
// manual as possible...
var l = lst.length
lst = lst
// remove undefined and non-features...
.filter(function(e){
return that[e] != null && that[e] instanceof Feature })
// build the sort table: [ <priority>, <rev-index>, <elem> ]
// NOTE: <rev-index> is element number from the tail...
.map(function(e, i){ return [ -that[e].getPriority(), i, e ] })
// do the sort...
// NOTE: for some reason JS compares lists as strings so we
// have to comare the list manually...
.sort(function(a, b){ return a[0] - b[0] || a[1] - b[1] })
// cleanup -- drop the table...
.map(function(e){ return e[2] })
// sort dependencies again...
// NOTE: this bubles the "priority" up the dependency tree...
// NOTE: this will not resolve all the conflicts...
lst = _sortDep(lst, missing, depth).unique()
// get disabled features...
var disabled = []
Object.keys(missing).forEach(function(n){
if(n[0] == '-'){
delete missing[n]
disabled.push(n.slice(1))
}
})
// clasify features...
var unapplicable = []
var conflicts = {}
var that = this
lst = lst.filter(function(n, i){
var e = that[n]
if(e == null){
return true
}
// disabled...
if(disabled.indexOf(n) >= 0){
return false
}
// check applicability...
if(e.isApplicable && !e.isApplicable.call(that, obj)){
unapplicable.push(n)
return false
}
// no dependencies...
if(e.depends == null || e.depends.length == 0){
return true
}
// mark feature unapplicable if it depends on an unapplicable
// or a disabled...
// NOTE: we need to do this once as features at this point
// are sorted by dependencies...
if(e.depends.filter(function(dep){
return unapplicable.indexOf(dep) > -1
|| disabled.indexOf(dep) > -1
}).length > 0){
unapplicable.push(n)
return false
}
// keep only conflicting...
var deps = e.depends.filter(function(dep){
dep = lst.indexOf(dep)
return dep == -1 || dep > i
})
// skip missing dependencies...
// NOTE: we need to check for missing again as a feature
// could have been removed due to inapplicability or
// being undefined...
deps = _skipMissing(n, deps, missing)
// no conflicts...
if(deps.length == 0){
return true
}
// dependency exists but in wrong order -- can't fix...
conflicts[n] = deps
return false
})
// skip duplicate exclusive features...
var exclusive = []
var excluded = []
lst = lst.filter(function(n){
var e = that[n]
if(e == null || e.exclusive == null ){
return true
}
// count the number of exclusive features already present...
var res = e.exclusive
.filter(function(n){
if(exclusive.indexOf(n) < 0){
exclusive.push(n)
return false
}
return true
})
.length == 0
if(!res){
excluded.push(n)
}
return res
})
return {
features: lst,
disabled: disabled,
excluded: excluded,
missing: missing,
conflicts: conflicts,
unapplicable: unapplicable,
}
},
//*/
// Build list of features... // Build list of features...
// //
// Build list of all features for an empty object... // Build list of all features for an empty object...