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cleanup...
Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>
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6e4b437e5a
commit
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122
diff2.js
122
diff2.js
@ -88,124 +88,6 @@ module.CONTENT =
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//---------------------------------------------------------------------
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//
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// walk(<handler>[, <options>])
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// walk(<handler>, <path>[, <options>])
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// -> <walker>
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//
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//
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// <handler>(<obj>, <path>, <next>, <type>)
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// -> <value>
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// !> STOP(<value>)
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//
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// Link handling...
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// <handler>(<obj>, <path>, <orig-path>, 'LINK')
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// -> <value>
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// !> STOP(<value>)
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//
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//
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// <walker>(<obj>)
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// <walker>(<obj>, <path>)
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// -> <generator>
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// -> <value>
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//
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//
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// <next> is a mutable array that can be edited it <handler> affecting
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// further walking (a-la Python's walk(..)).
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//
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//
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// XXX the idea here is to try to decouple the walk from the format and
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// move the formatters and other stuff out...
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// ...not sure if this is simpler yet...
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// XXX can we decouple this from what we are walking???
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// XXX should this be a constructor???
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// ...for better introspection and instanceof testing...
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var walk =
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module.walk =
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function(handler, listers, path=[], options={}){
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// normalize the handler...
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var _handler =
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handler instanceof types.Generator ?
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handler
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: function*(){ yield handler(...arguments) }
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listers =
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options.listers || listers
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// parse args...
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options =
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typeof(path) == 'object' && !(path instanceof Array) ?
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path
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: options
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options =
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// XXX inherit options from HANDLE_DEFAULTS of we don't already...
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// XXX do we need to do this???
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!object.parentOf(module.HANDLE_DEFAULTS, options) ?
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Object.assign(
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{ __proto__: module.HANDLE_DEFAULTS },
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options)
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: options
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var p = path
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// NOTE: we are intentionally shadowing module.walk(..) here and thus
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// use the shadowing function recursively. This is done to
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// preserve the name for better introspection...
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var walk = function*(obj, path=p, type=undefined, seen){
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path = path instanceof Array ?
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path
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: typeof(path) == 'string' ?
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str2path(path)
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: []
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type = type || 'root'
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// handle reference loops...
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seen = seen || new Map()
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if(seen.has(obj)){
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yield* _handler(obj, path, seen.get(obj), 'LINK')
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return }
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typeof(obj) == 'object'
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&& seen.set(obj, path)
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// format:
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// [
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// [<handler-name>, [ [<key>, <value>], .. ]],
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// ..
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// ]
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var next =
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[...Object.entries(listers)
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// NOTE: we need this to support throwing STOP...
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.iter()
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.filter(function([n, h]){
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return h.list
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&& !options['no' + n.capitalize()] })
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.map(function([n, h]){
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var res = h.list(obj)
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return res
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&& [n, res] })
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.filter(function(e){
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return !!e }) ]
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try {
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yield* _handler(obj, path, next, type)
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// next/children...
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yield* next
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.iter()
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.map(function*([type, items]){
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yield* items
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.iter()
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.map(function*([key, value]){
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yield* walk(value, path.concat(key), type, seen) }) })
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// handle STOP...
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} catch(err){
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if(err === module.STOP){
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return
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} else if(err instanceof module.STOP){
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yield err.value
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return }
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throw err } }
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return walk }
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// XXX should we move this to a separate lib???
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var Walk =
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module.Walk =
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@ -355,13 +237,13 @@ module.OBJECT_LISTERS = {
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}
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// XXX rename -- objectWalker(..) ???
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// XXX add function support...
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var objectWalker =
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module.objectWalker =
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//walk(
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Walk(
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function(obj, path, next, type){
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// text...
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// XXX should this be here or in OBJECT_LISTERS???
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if(typeof(obj) == 'string' && obj.includes('\n')){
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next.push(['text',
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obj.split(/\n/g).entries()
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