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a generalization...

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Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>
This commit is contained in:
Alex A. Naanou 2021-06-28 19:41:03 +03:00
parent 1fb6c3bdd2
commit 28648fff06
1 changed files with 33 additions and 13 deletions
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diff2.js
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@ -88,6 +88,17 @@ module.CONTENT =
//--------------------------------------------------------------------- //---------------------------------------------------------------------
//
// Walk(<handler>[, <options>])
// -> <walker>
//
// Walk(<options>)
// -> <walker>
//
//
// NOTE: in the Walk(<options>) case, <options> must contain a .handler
// function.
//
// XXX need to think about extension use-cases... // XXX need to think about extension use-cases...
// XXX should we move this to a separate lib??? // XXX should we move this to a separate lib???
var Walk = var Walk =
@ -99,6 +110,10 @@ object.Constructor('Walk', {
// NOTE: handler argument always overwrites the value given in options... // NOTE: handler argument always overwrites the value given in options...
__init__: function(handler, options){ __init__: function(handler, options){
// handle Walk(<options>) case...
if(arguments.length == 1 && typeof(handler) != 'function'){
options = handler
handler = options.handler }
// sanity check... // sanity check...
if(typeof(handler) != 'function'){ if(typeof(handler) != 'function'){
throw new Error('Walk(..): a callable handler us required.') } throw new Error('Walk(..): a callable handler us required.') }
@ -190,6 +205,7 @@ module.OBJECT_LISTERS = {
throw module.STOP } }, throw module.STOP } },
/* XXX not sure if this should be here... /* XXX not sure if this should be here...
// XXX TEXT...
// XXX also this is diff-specific... // XXX also this is diff-specific...
text: function(obj){ text: function(obj){
return typeof(obj) == 'string' return typeof(obj) == 'string'
@ -242,13 +258,14 @@ module.OBJECT_LISTERS = {
// XXX add function support... // XXX add function support...
// XXX would be nice to be able to extend this... // XXX would be nice to be able to extend this...
// e.g. make this a generic walker and for a diff-specific walker add // e.g. make this a generic walker and for a diff-specific walker
// text support... // add text support...
var objectWalker = var objectWalker =
module.objectWalker = module.objectWalker =
Walk( Walk({
function(obj, path, next, type){ handler: function(obj, path, next, type){
// text... // text...
// XXX TEXT...
// XXX should this be here or in OBJECT_LISTERS??? // XXX should this be here or in OBJECT_LISTERS???
// XXX also this is diff-specific... // XXX also this is diff-specific...
if(typeof(obj) == 'string' && obj.includes('\n')){ if(typeof(obj) == 'string' && obj.includes('\n')){
@ -266,10 +283,13 @@ Walk(
obj obj
: typeof(obj) == 'object' ? : typeof(obj) == 'object' ?
{type: obj.constructor.name} {type: obj.constructor.name}
// XXX TEXT...
//: typeof(obj) == 'string' && obj.includes('\n') ?
// {type: 'text'}
: obj, : obj,
] }, ] },
{
listers: module.OBJECT_LISTERS, listers: module.OBJECT_LISTERS,
// support string paths...
normalizePath: function(path){ normalizePath: function(path){
return path instanceof Array ? return path instanceof Array ?
path path