flynx/walk.js
1
0
Fork 0
mirror of https://github.com/flynx/walk.js.git synced 2025-10-29 11:00:13 +00:00
Code Issues Packages Projects Releases Wiki Activity

bugfix...

Browse Source 
Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>
This commit is contained in:
Alex A. Naanou 2018-09-30 00:29:28 +03:00
parent 95b089c317
commit 7df2a6b4d9
2 changed files with 43 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
package.json
View File

@ -1,6 +1,6 @@
{
"name": "generic-walk",
"version": "1.0.0",
"version": "1.1.0",
"description": "An extensible tree walk(..) framework...",
"main": "walk.js",
"scripts": {

67
walk.js
View File

@ -46,7 +46,7 @@ function(getter, state, ...nodes){
// NOTE: this can leak out but we only care about it's identity thus
// no damage is likely to be done...
var WalkStopException
// This is used to hold the result when stop(..) is called, until we
// this is used to hold the result when stop(..) is called, until we
// catch WalkStopException and return it from the walker...
var stop_res
@ -55,7 +55,7 @@ function(getter, state, ...nodes){
// construct a comfortable env for the user and handle the
// results...
var _get = function(node){
var next = []
var next_nodes = []
// stop walking...
// stop()
@ -63,32 +63,49 @@ function(getter, state, ...nodes){
//
// NOTE: 'throw' is used to stop all handling, including
// the rest of the current level...
var stop = function(r){
stop_res = r
var stop = function(state){
stop_res = state
WalkStopException = new Error('WALK_STOP_EVENT')
throw WalkStopException
}
res = getter.call(context,
res,
node,
function(action, state, ...nodes){
// queue nodes (breadth-first)...
if(action == 'queue'){
next = nodes
// handle more nodes...
//
// Qeueue nodes for processing (breadth-first)...
// next('queue', state, ...nodes)
// -> state
// NOTE: this returns state as-is, this is done to
// preserve signature compatibility with
// next('do', ..)...
//
// Process nodes (depth-first)...
// next('do', state, ...nodes)
// -> state
//
// Stop processing and return from walker...
// next('stop')
// next('stop', state)
//
var next = function(action, state, ...nodes){
// queue nodes (breadth-first)...
if(action == 'queue'){
next_nodes = nodes
// process nodes (depth-first)...
} else if(action == 'do'){
state = _step(context, nodes, state)
// process nodes (depth-first)...
} else if(action == 'do'){
state = _step(context, nodes, state)
// stop processing...
} else if(action == 'stop'){
stop(state)
}
return state
},
stop)
return next
// stop processing...
} else if(action == 'stop'){
stop(state)
}
return state
}
// call the getter...
res = getter.call(context, res, node, next, stop)
return next_nodes
}
return nodes.length == 0 ?
@ -98,10 +115,10 @@ function(getter, state, ...nodes){
// NOTE: see note below... ( ;) )
: _step(context, nodes
.map(_get)
.reduce(function(next, e){
.reduce(function(next_nodes, e){
return e instanceof Array ?
next.concat(e)
: next.push(e) }, []), res)
next_nodes.concat(e)
: next_nodes.push(e) }, []), res)
}
// _step(..) wrapper, handle WalkStopException and setup the initial
// context...