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538x 84x 84x 3x 84x 94x 232x 232x 232x 232x 232x 11x 4x 7x 7x 7x 7x 232x 232x 232x 232x 11x 11x 11x 2x 2x 2x 1x 1x 1x 1x 1x 9x 230x 84x 38x 26x 12x 261x 98x 98x 35x 35x 35x 35x 35x 35x 35x 77x 71x 6x 6x 87x 87x 87x 87x 40x 47x 47x 47x 47x 80x 128x 47x 158x 3x 1x 16x | const XSL_NS_URL = 'http://www.w3.org/1999/XSL/Transform'
, HTML_NS_URL = 'http://www.w3.org/1999/xhtml'
, EXSL_NS_URL = 'http://exslt.org/common'
, DCE_NS_URL ="urn:schemas-epa-wg:dce";
// const log = x => console.debug( new XMLSerializer().serializeToString( x ) );
const attr = (el, attr)=> el?.getAttribute?.(attr)
, isText = e => e.nodeType === 3
, isString = s => typeof s === 'string'
, isNode = e => e && typeof e.nodeType === 'number'
, createText = ( d, t) => (d.ownerDocument || d ).createTextNode( t )
, removeChildren = n => { while(n.firstChild) n.firstChild.remove(); return n; }
, emptyNode = n => { n.getAttributeNames().map( a => n.removeAttribute(a) ); return removeChildren(n); }
, xslNs = x => ( x?.setAttribute('xmlns:xsl', XSL_NS_URL ), x )
, xslHtmlNs = x => ( x?.setAttribute('xmlns:xhtml', HTML_NS_URL ), xslNs(x) )
, isValidTagName = tag=> ( /^[_a-zA-Z][-_:a-zA-Z0-9]*$/ .test(tag) )
, mix = (o,kv) => { Object.keys(kv).map(k=> o[k] = kv[k] ) ; return o}
, create = ( tag, t = '', d=document ) =>
{
const create = tag => ( e => ((t && e.append(createText(d.ownerDocument||d, t))),e) )((d.ownerDocument || d ).createElement( tag ))
Eif( isValidTagName(tag) )
return create(tag)
const e = create('dce-object');
e.setAttribute('dce-object-name',tag)
return e;
}
, cloneAs = (p,tag) =>
{ const px = p.ownerDocument.createElementNS(p.namespaceURI,tag);
for( let a of p.attributes)
px.setAttribute(a.name, a.value);
for( let c of p.childNodes )
px.append(c.cloneNode(true));
return px;
};
export {cloneAs,mix};
function
ASSERT(x)
{
// if(!x)
// debugger
}
export function
xml2dom( xmlString )
{
return new DOMParser().parseFromString( xmlString, "application/xml" )
}
export function
xmlString(doc){ return new XMLSerializer().serializeToString( doc ) }
function x(doc) { return xmlString(doc) }
function
injectData( root, sectionName, arr, cb )
{ const create = ( tag ) => root.ownerDocument.createElement( tag );
const inject = ( tag, parent, s ) =>
{ parent.append( s = create( tag ) );
return s;
};
const l = inject( sectionName, root );
[ ...arr ].forEach( e => l.append( cb( e ) ) );
return l;
}
function
assureSlot( e )
{
if( !e.slot )
{
if( !e.setAttribute )
e = create( 'span', e.textContent.replaceAll( '\n', '' ) );
e.setAttribute( 'slot', '' )
}
return e;
}
function
keepAttributes(e, aNames)
{ e.getAttributeNames().forEach( n=> aNames.includes(n) || e.removeAttribute(n) ); }
export const
sanitizeBlankText = payload=> [...payload].filter(e=>!(e.nodeType===3 && e.data.trim() ==='' ));
export function
obj2node( o, tag, doc )
{ const t = typeof o;
if( t === 'string' )
return create(tag,o,doc);
if( t === 'number' )
return create(tag,''+o,doc);
Iif( isNode(o) )
{
const el = create(tag);
el.append(o);
return el;
}
if( o instanceof Array )
{ const ret = create('array','',doc);
o.map( ae => ret.append( obj2node(ae,tag,doc)) );
return ret
}
if( o instanceof FormData )
{ const ret = create('form-data','',doc);
for( const p of o )
ret.append( obj2node(p[1],p[0],doc) );
return ret
}
const ret = create(tag,'',doc);
for( let k in o )
{
if( typeof o[ k ] === 'function' || o[ k ] instanceof Window )
continue
if( isNode( o[ k ] ) )
{ Iif( k === 'data' || k==='value' )
;
else
continue
}
if( typeof o[ k ] !== "object" && isValidTagName( k ) )
ret.setAttribute( k, o[ k ] )
else
ret.append( obj2node( o[ k ], k, doc ) )
}
return ret;
}
export function
tagUid( node )
{ // {} to xsl:value-of
forEach$(node,'*',d => [...d.childNodes]
.filter( e => e.nodeType === 3 && e.parentNode.localName !== 'style' && e.data )
.forEach( e=>
{ const s = e.data,
m = s.matchAll( /{([^}]*)}/g );
Eif(m)
{ let l = 0
, txt = t => createText(e,t)
, tt = [];
[...m].forEach(t=>
{ if( t.index > l )
tt.push( txt( t.input.substring( l, t.index ) ))
const v = node.querySelector('value-of').cloneNode();
v.setAttribute('select', t[1] );
tt.push(v);
l = t.index+t[0].length;
})
if( l < s.length)
tt.push( txt( s.substring(l,s.length) ));
Eif( tt.length )
{ for( let t of tt )
d.insertBefore(t,e);
d.removeChild(e);
}
}
}));
Eif( 'all' in node ) {
let i= 1;
for( let e of node.all )
e.setAttribute && !e.tagName.startsWith('xsl:') && e.setAttribute('data-dce-id', '' + i++)
}
return node
}
export function
createXsltFromDom( templateNode, S = 'xsl:stylesheet' )
{
const declaredAttributes = []
, hardcodedAttributes = {}
, exposedAttributes={};
if( templateNode.tagName === S || templateNode.documentElement?.tagName === S )
return tagUid(mix( templateNode, { declaredAttributes, hardcodedAttributes, exposedAttributes } ));
const sanitizeXsl = xml2dom(`<xsl:stylesheet version="1.0" xmlns:xsl="${ XSL_NS_URL }" xmlns:xhtml="${ HTML_NS_URL }" xmlns:exsl="${EXSL_NS_URL}" exclude-result-prefixes="exsl" >
<xsl:output method="xml"/>
<xsl:template match="/"><dce-root xmlns="${ HTML_NS_URL }"><xsl:apply-templates select="*" /></dce-root></xsl:template>
<xsl:template match="*[name()='template']">
<xsl:apply-templates mode="sanitize" select="*|text()"/>
</xsl:template>
<xsl:template match="*">
<xsl:apply-templates mode="sanitize" select="*|text()"/>
</xsl:template>
<xsl:template match="*[name()='svg']|*[name()='math']">
<xsl:apply-templates mode="sanitize" select="."/>
</xsl:template>
<xsl:template mode="sanitize" match="*[count(text())=1 and count(*)=0]">
<xsl:copy>
<xsl:apply-templates mode="sanitize" select="@*"/>
<xsl:value-of select="text()"></xsl:value-of>
</xsl:copy>
</xsl:template>
<xsl:template mode="sanitize" match="xhtml:*[count(text())=1 and count(*)=0]">
<xsl:element name="{local-name()}">
<xsl:apply-templates mode="sanitize" select="@*"/>
<xsl:value-of select="text()"></xsl:value-of>
</xsl:element>
</xsl:template>
<xsl:template mode="sanitize" match="*|@*">
<xsl:copy>
<xsl:apply-templates mode="sanitize" select="*|@*|text()"/>
</xsl:copy>
</xsl:template>
<xsl:template mode="sanitize" match="text()[normalize-space(.) = '']"/>
<xsl:template mode="sanitize" match="text()">
<dce-text>
<xsl:copy/>
</dce-text>
</xsl:template>
<xsl:template mode="sanitize" match="xsl:value-of|*[name()='slot']">
<xsl:copy>
<xsl:apply-templates mode="sanitize" select="*|@*|text()"/>
</xsl:copy>
</xsl:template>
<xsl:template mode="sanitize" match="xhtml:*">
<xsl:element name="{local-name()}">
<xsl:apply-templates mode="sanitize" select="*|@*|text()"/>
</xsl:element>
</xsl:template>
<xsl:template mode="sanitize" match="xhtml:input">
<xsl:element name="{local-name()}">
<xsl:apply-templates mode="sanitize" select="*[not(name()='slice')]|@*|text()"/>
</xsl:element>
<xsl:for-each select="slice">
<xsl:copy>
<xsl:attribute name="for" >^</xsl:attribute>
<xsl:apply-templates mode="sanitize" select="*|@*|text()"/>
</xsl:copy>
</xsl:for-each>
</xsl:template>
</xsl:stylesheet>`)
const sanitizeProcessor = new XSLTProcessor()
, tc = (n =>
{
forEach$(n,'custom-element', ce=>{
Eif( 'template' === ce.firstElementChild.localName )
{
[...ce.firstElementChild.content.childNodes].forEach(n=>ce.append(n));
ce.firstElementChild.remove();
}
})
forEach$(n,'script', s=> s.remove() );
const xslRoot = n.content ?? n.firstElementChild?.content ?? n.body ?? n;
xslTags.forEach( tag => forEach$( xslRoot, tag, el=>toXsl(el,xslRoot) ) );
const e = n.firstElementChild?.content || n.content
, asXmlNode = r => {
const d = xml2dom( '<xhtml/>' )
, n = d.importNode(r, true);
d.replaceChild(n,d.documentElement);
if( n.namespaceURI === HTML_NS_URL && !attr(n,'xmlns'))
n.setAttribute('xmlns',HTML_NS_URL);
return xslHtmlNs(n);
};
if( e )
{ const t = create('div');
[ ...e.childNodes ].map( c => t.append(c.cloneNode(true)) )
return asXmlNode(t)
}
return asXmlNode(n.documentElement || n.body || n)
})(templateNode)
, xslDom = xml2dom(
`<xsl:stylesheet version="1.0"
xmlns:xsl="${ XSL_NS_URL }"
xmlns:xhtml="${ HTML_NS_URL }"
xmlns:dce="urn:schemas-epa-wg:dce"
xmlns:exsl="http://exslt.org/common"
exclude-result-prefixes="exsl"
>
<xsl:template match="ignore">
<xsl:choose>
<xsl:when test="//attr">{//attr}</xsl:when>
<xsl:otherwise>{def}</xsl:otherwise>
</xsl:choose><xsl:value-of select="."></xsl:value-of></xsl:template>
<xsl:template mode="payload" match="attributes"></xsl:template>
<xsl:template match="/">
<xsl:apply-templates mode="payload" select="/datadom/attributes"/>
</xsl:template>
<xsl:template name="slot" >
<xsl:param name="slotname" />
<xsl:param name="defaultvalue" />
<xsl:choose>
<xsl:when test="//payload/*[@slot=$slotname]">
<xsl:copy-of select="//payload/*[@slot=$slotname]"/>
</xsl:when>
<xsl:otherwise>
<xsl:copy-of select="$defaultvalue"/>
</xsl:otherwise>
</xsl:choose>
</xsl:template>
<xsl:variable name="js-injected-body">
<xsl:call-template name="slot" >
<xsl:with-param name="slotname" select="''"/>
<xsl:with-param name="defaultvalue"/>
</xsl:call-template>
</xsl:variable>
</xsl:stylesheet>`
);
sanitizeProcessor.importStylesheet( sanitizeXsl );
const fr = sanitizeProcessor.transformToFragment(tc, document)
, $ = (e,css) => e.querySelector(css)
, payload = $( xslDom, 'template[mode="payload"]');
Iif( !fr )
return console.error("transformation error",{ xml:tc.outerHTML, xsl: xmlString( sanitizeXsl ) });
Iif( 'dce-root'!==fr.firstElementChild.localName )
{ const r = fr.ownerDocument.createElement('dce-root');
[...fr.childNodes].forEach(n=>r.append(n));
fr.append(r)
}
[...fr.querySelectorAll('[test]')].forEach( n=>{
const t = attr(n,'test')
, r = t.replace(/hasBoolAttribute\((.*?)\)/g,
(match, p1, p2,p3,p4)=>
{ const a = p1.substring(1);
return `(not($${a} = \'false\') and ($${a} = '' or $${a} = '${a}' or $${a} = 'true' ))`
});
t!== r && n.setAttribute('test',r);
});
[...fr.querySelectorAll('dce-root>attribute')].forEach( a=>
{
keepAttributes(a,'namespace,name,select');
const p = cloneAs(a,'xsl:param')
, name = attr(a,'name');
declaredAttributes.push(name);
if( a.childNodes.length )
hardcodedAttributes[name] = a.textContent;
payload.append(p);
if( a.hasAttribute('select') )
{
exposedAttributes[ name ] = attr( a, 'select' );
keepAttributes( p, 'select,name' );
let select = attr(a,'select').split('??');
let val;
if( select?.length>1 )
{ p.removeAttribute('select');
const c = $( xslDom, 'template[match="ignore"]>choose').cloneNode(true);
emptyNode(c.firstElementChild).append( createText(c,'{'+select[0]+'}'));
c.firstElementChild.setAttribute('test',select[0]);
for( let i=1; i<select.length-1; i++)
{ const when = c.firstElementChild.cloneNode(true);
emptyNode(when).append( createText(c,'{'+select[i]+'}'));
when.setAttribute('test',select[i]);
c.insertBefore(when, c.lastElementChild);
}
emptyNode(c.lastElementChild ).append( createText(c,'{'+select[select.length-1]+'}'));
p.append(c);
val = c.cloneNode(true);
}else
val = cloneAs(a,'xsl:value-of');
val.removeAttribute('name');
a.append(val);
a.removeAttribute('select');
}else
{
keepAttributes( p, 'name' );
p.setAttribute('select','/datadom/attributes/'+name)
if( !hardcodedAttributes[name] )
a.remove();
}
});
[...fr.querySelectorAll('[value]')].filter(el=>el.getAttribute('value').match( /\{(.*)\?\?(.*)\}/g )).forEach(el=>
{ const v = attr(el,'value');
Eif(v)
el.setAttribute('value', evalCurly(v));
});
for( const c of fr.childNodes )
payload.append(xslDom.importNode(c,true))
const embeddedTemplates = [...payload.getElementsByTagName('xsl:template')];
embeddedTemplates.forEach(t=>payload.ownerDocument.documentElement.append(t));
const slotCall = $(xslDom,'call-template[name="slot"]')
, slot2xsl = s =>
{ const v = slotCall.cloneNode(true)
, name = attr(s,'name');
name && v.firstElementChild.setAttribute('select',`'${ name }'`)
for( let c of s.childNodes)
v.lastElementChild.append(c)
return v
};
forEach$( payload,'slot', s => s.parentNode.replaceChild( slot2xsl(s), s ) )
const ret = tagUid(xslDom);
mix( ret, { declaredAttributes, hardcodedAttributes, exposedAttributes } );
return ret;
}
export async function
xhrTemplate(src)
{
const dom = await new Promise((resolve,reject)=>
{ const xhr = new XMLHttpRequest();
xhr.open("GET", src);
xhr.responseType = "document";
// xhr.overrideMimeType("text/xml");
xhr.onload = () =>
{ if( xhr.readyState === xhr.DONE && xhr.status === 200 )
resolve( xhr.responseXML?.body || xhr.responseXML || create('div', xhr.responseText ) )
else
Ereject(`${xhr.statusText} - ${src}`)
};
xhr.addEventListener("error", ev=>reject(ev) );
xhr.send();
})
return dom
}
export function
deepEqual(a, b, O=false)
{
if( a === b )
return true;
if( (typeof a !== "object" || a === null) || (typeof b !== "object" || b === null)
|| Object.keys(a).length !== Object.keys(b).length )
return O;
for( let k in a )
if( !(k in b) || !deepEqual( a[k], b[k] ) )
return O
return true;
}
const splitSliceNames = v => v.split('|').map( s=>s.trim() ).filter(s=>s);
export const
assureSlices = ( root, names) =>
splitSliceNames(names).map( xp =>
{ let d = root.ownerDocument
, append = n=> (root.append(n),n);
if(xp.includes('/'))
{ const ret = [], r = d.evaluate( xp, root );
for( let n; n = r.iterateNext(); )
ret.push( n )
return ret
}
return [...root.childNodes].find(n=>n.localName === xp) || append( create(xp,'',d) );
}).flat();
/**
*
* @param x slice node
* @param sliceNames slice name, xPath in /datadom/slice/
* @param ev Event obj
* @param dce
*/
export function
event2slice( x, sliceNames, ev, dce )
{
if( ev.sliceProcessed )
return
ev.sliceProcessed = 1;
// evaluate slices[]
// inject @attributes
// inject event
// evaluate slice-value
// slice[i] = slice-value
return assureSlices( x, sliceNames ?? '' ).map( s =>
{
const d = x.ownerDocument
, el = ev.sliceEventSource
, sel = ev.sliceElement
, cleanSliceValue = ()=>[...s.childNodes].filter(n=>n.nodeType===3 || n.localName==='value' || n.localName==='form-data').map(n=>n.remove());
el.getAttributeNames().map( a => s.setAttribute( a, attr(el,a) ) );
[...s.childNodes].filter(n=>n.localName==='event').map(n=>n.remove());
if( 'validationMessage' in el )
s.setAttribute('validation-message', el.validationMessage);
ev.type==='init' && cleanSliceValue();
s.append( obj2node( ev, 'event', d ) );
const notChecked = ( 'checkbox' === el.type || 'radio' === el.type ) && !el.checked ;
if( sel.hasAttribute('slice-value') )
{ if( el.value === undefined)
s.removeAttribute('value')
else
s.setAttribute('value', el.value );
const v = notChecked? '' : xPath( attr( sel, 'slice-value'),s );
cleanSliceValue();
s.append( createText( d, v ) );
}else
{ if( 'elements' in el )
{ cleanSliceValue();
s.append( obj2node(new FormData(el),'value', s.ownerDocument) )
return s
}
const v = notChecked? '' : el.value ?? attr( el, 'value' );
cleanSliceValue();
if( v === null || v === undefined )
{
[...s.childNodes].filter(n=>n.localName!=='event').map(n=>n.remove());
s.removeAttribute('value');
}
else
{ const ve = isString(v) ? createText( d, v) : obj2node(v,'value',s.ownerDocument);
s.append( ve );
s.setAttribute('value',v);
}
}
return s
})
}
function forEach$( el, css, cb){
Eif( el.querySelectorAll )
[...el.querySelectorAll(css)].forEach(cb)
}
const loadTemplateRoots = async ( src, dce )=>
{
if( !src || !src.trim() )
return [dce]
if( src.startsWith('#') )
return ( n =>
{ const a = n.querySelectorAll(src)
return [...( a.length ? a : n.getRootNode().querySelectorAll(src) )]
})(dce.parentElement)
try
{ const [path, hash] = src.split('#');
Iif( '.' === src.charAt(0))
src = new URL(path, dce.closest('[base]')?.getAttribute('base') || location ).href;
else
try
{ src = import.meta.resolve( path );
if(hash)
src +='#'+hash;
}
catch( e )
{ console.error(e.message) }
// todo cache
const dom = await xhrTemplate(src);
dce.setAttributeNS('xml', 'base', src );
if( hash )
{ const ret = dom.querySelectorAll('#'+hash);
if( ret.length )
return [...ret];
console.error('template not found',src+'#'+hash);
return [dce]
}
return [dom]
}catch (error){ return [dce]}
}
export function mergeAttr( from, to )
{ for( let a of from.attributes)
try
{ const name = a.name;
if( name.startsWith('xmlns') )
continue;
Iif( a.namespaceURI )
{ if( !to.hasAttributeNS(a.namespaceURI, name) || to.getAttributeNS(a.namespaceURI, name) !== a.value )
to.setAttributeNS( a.namespaceURI, name, a.value )
}else
{ if( !to.hasAttribute(name) || to.getAttribute(name) !== a.value )
to.setAttribute( a.name, a.value )
}
if( a.name === 'value')
to.value = a.value
}catch(e)
{ console.warn('attribute assignment error',e?.message || e); }
const ea = to.dceExportedAttributes
, aa = to.getAttribute('dce-exported-attributes')
, em = aa ? new Set( aa.split(' ') ) : null;
for( let a of to.getAttributeNames() )
if( !from.hasAttribute(a) && !ea?.has(a) && !em?.has(a) )
to.removeAttribute(a)
}
export function assureUnique(n, id=0)
{
const m = {}
for( const e of n.childNodes )
{
const a = attr(e,'data-dce-id') || e.dceId || 0;
if( !m[a] )
{ if( !a )
{ m[a] = e.dceId = ++id;
if( e.setAttribute )
e.setAttribute('data-dce-id', e.dceId )
}else
m[a] = 1;
}else
{ const v = e.dceId = a + '-' + m[a]++;
if( e.setAttribute )
e.setAttribute('data-dce-id', v )
}
e.childNodes.length && assureUnique(e)
}
}
export function appendByDceId(parent,e,k)
{
k = 1*k;
for( let n of parent.childNodes )
if( (n.dceId ?? n.getAttribute('data-dce-id')*1) > k )
return parent.insertBefore(e,n);
parent.append(e)
}
export function merge( parent, fromArr )
{
Iif( 'dce-root' === parent.firstElementChild?.localName && 'dce-root' !== fromArr[0]?.localName)
return;
if( !fromArr.length )
return 'dce-root' !== parent.firstElementChild?.localName && removeChildren(parent);
const id2old = {};
for( let c of parent.childNodes)
{ ASSERT( !id2old[c.dceId] );
if( isText(c) )
{ ASSERT( c.data.trim() );
id2old[c.dceId || 0] = c;
} else
id2old[attr(c, 'data-dce-id') || 0] = c;
}
for( let e of [...fromArr] )
{ const k = attr(e, 'data-dce-id') || e.dceId;
const o = id2old[ k ];
if( o )
{ if( isText(e) )
{ if( o.nodeValue !== e.nodeValue )
o.nodeValue = e.nodeValue;
}else
{ mergeAttr(e,o)
if( o.childNodes.length || e.childNodes.length )
merge(o, e.childNodes)
}
delete id2old[ k ]
}else
appendByDceId(parent,e,k)
}
for( let v of Object.values(id2old) )
Eif( v.localName !== 'dce-root')
v.remove();
}
export function assureUID(n,attr)
{ Eif( !n.hasAttribute(attr) )
n.setAttribute(attr, crypto.randomUUID());
return n.getAttribute(attr)
}
export const evalCurly = s =>
{ const exp = [...s?.matchAll( /([^{}]*)(\{)([^}]+)}([^{}]*)/g ) ].map(l=>`${l[1]}{${ xPathDefaults(l[3] )}}${l[4]}`);
return exp.join('');
}
export const xPathDefaults = x=>
{ if(!x.trim())
return x;
const xx = x.split('??')
, a = xx.shift()
, b = xPathDefaults(xx.join('??'));
return xx.length ? `concat( ${a} , substring( ${b} , (1+string-length( ${b} )) * string-length( ${a} ) ) )`: x
// return xx.length ? `${a}|(${xPathDefaults(xx.join('??'))})[not(${a})]`: a
}
export const xPath = (x,root)=>
{
const xx = x.split('??');
if( xx.length > 1 )
return xPath(xx[0], root) || xPath(xx[1], root);
x = xPathDefaults(x);
const it = root.ownerDocument.evaluate(x, root);
switch( it.resultType )
{ case XPathResult.NUMBER_TYPE: return it.numberValue;
case XPathResult.STRING_TYPE: return it.stringValue;
case XPathResult.BOOLEAN_TYPE: return it.booleanValue;
}
let ret = '';
for( let n ;n=it.iterateNext(); )
ret += n.textContent;
return ret
}
export const xslTags = 'stylesheet,transform,import,include,strip-space,preserve-space,output,key,decimal-format,namespace-alias,value-of,copy-of,number,apply-templates,apply-imports,for-each,sort,if,choose,when,otherwise,attribute-set,call-template,with-param,variable,param,text,processing-instruction,element,attribute,comment,copy,message,fallback'.split(',');
export const toXsl = (el, defParent) => {
const x = create('xsl:'+el.localName);
for( let a of el.attributes )
x.setAttribute( a.name, a.value );
while(el.firstChild)
x.append(el.firstChild);
const replacement = el.localName === 'if' || el.localName === 'choose' ? (() => {
const span = create('span');
span.append(x);
return span;
})() : x;
if( el.parentElement )
el.parentElement.replaceChild( replacement, el );
else
{ const p = (el.parentElement || defParent)
, arr = [...p.childNodes];
arr.forEach((n, i) => {
if (n === el)
arr[i] = replacement;
});
p.replaceChildren(...arr);
}
};
export class
CustomElement extends HTMLElement
{
static observedAttributes = ['src','tag','hidden'];
async connectedCallback()
{
if(this.firstElementChild && this.firstElementChild.localName !== 'template')
console.log('custom-element used without template wrapping content\n', this.outerHTML);
const templateRoots = await loadTemplateRoots( attr( this, 'src' ), this )
, tag = attr( this, 'tag' )
, tagName = tag ? tag : 'dce-'+crypto.randomUUID();
for( const t of templateRoots )
forEach$(t.templateNode||t.content||t, 'style',s=>{
const slot = s.closest('slot');
const sName = slot ? `slot[name="${slot.name}"]`:'';
s.innerHTML = `${tagName} ${sName}{${s.innerHTML}}`;
this.append(s);
})
const templateDocs = templateRoots.map( n => createXsltFromDom( n ) )
, xp = templateDocs.map( (td, p) =>
{ p = new XSLTProcessor();
try{ p.importStylesheet( td ) }
catch( e )
{ console.error(e, xmlString(td)) }
return p
})
Object.defineProperty( this, "xsltString", { get: ()=>templateDocs.map( td => xmlString(td) ).join('\n') });
const dce = this
, sliceNodes = [...this.templateNode.querySelectorAll('[slice]')]
, sliceNames = sliceNodes.map(e=>attr(e,'slice'))
.filter(n=>!n.includes('/'))
.filter((v, i, a)=>a.indexOf(v) === i)
.map(splitSliceNames).flat();
const { declaredAttributes, hardcodedAttributes, exposedAttributes } = templateDocs[0];
const dceExportedAttributes = new Set([...Object.keys(hardcodedAttributes), ...Object.keys(exposedAttributes)]);
class DceElement extends HTMLElement
{
static get observedAttributes(){ return declaredAttributes; }
#inTransform = 0;
get dceExportedAttributes(){ return dceExportedAttributes; }
connectedCallback()
{ let payload = sanitizeBlankText(this.childNodes);
if( this.firstElementChild?.tagName === 'TEMPLATE' )
{
Iif( this.firstElementChild !== this.lastElementChild )
{ console.error('payload should have TEMPLATE as only child', this.outerHTML ) }
const t = this.firstElementChild;
t.remove();
payload = sanitizeBlankText(t.content.childNodes);
for( const n of payload )
if( n.localName === 'style' ){
const id = assureUID(this,'data-dce-style')
n.innerHTML= `${tagName}[data-dce-style="${id}"]{${n.innerHTML}}`;
t.insertAdjacentElement('beforebegin',n);
}else
if(n.nodeType===1)
t.insertAdjacentElement('beforebegin',n);
else if(n.nodeType===3)
t.insertAdjacentText('beforebegin',n.data);
}
const x = xml2dom( '<datadom/>' ).documentElement;
const createXmlNode = ( tag, t = '' ) => ( e =>
{ if( t )
e.append( createText( x, t ))
return e;
})(x.ownerDocument.createElement( tag ))
const payloadNode = injectData( x, 'payload' , payload , assureSlot );
xslNs(payloadNode);
xslHtmlNs(payloadNode);
this.innerHTML='';
const attrsRoot = injectData( x, 'attributes' , this.attributes, e => createXmlNode( e.nodeName, e.value ) )
, inAttrs = a=> this.hasAttribute(a) || [...attrsRoot.children].find(e=>e.localName === a);
mergeAttr( this, attrsRoot );
Object.keys(hardcodedAttributes).map(a=> inAttrs(a) || attrsRoot.append(createXmlNode(a,hardcodedAttributes[a])) );
Object.keys(exposedAttributes).map(a=> inAttrs(a) || attrsRoot.append(createXmlNode(a)) );
injectData( x, 'dataset', Object.keys( this.dataset ), k => createXmlNode( k, this.dataset[ k ] ) );
const sliceRoot = injectData( x, 'slice', sliceNames, k => createXmlNode( k, '' ) )
, sliceXPath = x => xPath(x, sliceRoot);
this.xml = x;
const sliceEvents=[];
const applySlices = ()=>
{ const processed = {}
for(let ev; ev = sliceEvents.pop(); )
{ const s = attr( ev.sliceElement, 'slice');
if( processed[s] )
continue;
event2slice( sliceRoot, s, ev, this );
processed[s] = ev;
}
Object.keys(processed).length !== 0 && transform();
}
let timeoutID;
this.onSlice = ev=>
{ sliceEvents.push(ev);
if( !timeoutID )
timeoutID = setTimeout(()=>
{ applySlices();
timeoutID =0;
},1);
};
const transform = this.transform = ()=>
{ Iif(this.#inTransform){ debugger }
this.#inTransform = 1;
const renderModel = ()=>
{
const ff = xp.map( (p,i) =>
{ const f = p.transformToFragment(x.ownerDocument, document)
Iif( !f )
console.error( "XSLT transformation error. xsl:\n", xmlString(templateDocs[i]), '\nxml:\n', xmlString(x) );
return f
});
ff.map( f =>
{ Iif( !f )
return;
assureUnique(f);
merge( this, f.childNodes )
})
let attrChangedCount = 0;
Object.entries(hardcodedAttributes).map(( [a,v] )=>
{ if( !this.hasAttribute(a) && v !== attr(this,a) )
{ this.setAttribute( a, v );
this.#applyAttribute( a, v );
attrChangedCount++;
}
});
Object.keys(exposedAttributes).map( a =>
{ let v = attr(this.firstElementChild,a);
if( v !== attr(this,a) )
{ this.setAttribute( a, v );
this.#applyAttribute( a, v );
attrChangedCount++;
}
});
return attrChangedCount;
};
if( renderModel() )
Iif( renderModel() )
console.warn("model update should not be the result of transform more than once");
function getSliceTarget(el)
{ let r = el;
Iif( el.localName === 'slice')
{ const ref= attr(el,'for');
if( !ref )
r = el.parentElement;
if( '^' === ref )
{ do r = r.previousElementSibling;
while( r.localName === 'slice' )
} else
r = this.querySelector(ref)
if( !r )
return console.warn(`can not find selector in "slice for=${ref}" `, el.outerHTML);
attr(el,'slice') || el.setAttribute('slice', attr(el,'name'))
}
return r;
}
forEach$( this,'[slice],[slice-event]', el =>
{ let evs = attr(el,'slice-event');
const sVal = el.hasAttribute('slice-value') || el.hasAttribute('value') || el.value;
const tgt = getSliceTarget(el);
if( !el.dceInitialized )
{ el.dceInitialized = 1;
if( tgt.hasAttribute('custom-validity') )
evs += ' change submit';
[...new Set((evs || 'change') .split(' '))]
.forEach( t=>
tgt.addEventListener( t, ev=>
{ ev.sliceElement = el;
ev.sliceEventSource = ev.currentTarget || ev.target;
ev.sliceProcessed = 0;
const slices = event2slice( sliceRoot, attr( ev.sliceElement, 'slice'), ev, this );
forEach$(this,'[custom-validity]',el =>
{ if( !el.setCustomValidity )
return;
const x = attr( el, 'custom-validity' );
try
{ const v = x && xPath( x, attrsRoot );
el.setCustomValidity( v === true? '': v === false ? 'invalid' : v );
}catch(err)
{ console.error(err, 'xPath', x) }
})
const x = attr(tgt,'custom-validity')
, v = x && xPath( x, attrsRoot )
, msg = v === true? '' : v;
if( x )
{ el.setCustomValidity ? el.setCustomValidity( msg ) : ( el.validationMessage = msg );
slices.map( s => s.setAttribute('validation-message', msg ) );
if( ev.type === 'submit' )
{ Iif( v === true )
return;
setTimeout(transform,1)
if( !!v === v )
{ v || ev.preventDefault();
return v;
}
Eif( v )
{ ev.preventDefault();
return !1
}
return ;
}else
setTimeout(transform,1)
}
this.onSlice(ev);
} ));
if( !evs || evs.includes('init') )
{ if( sVal )
this.onSlice({type:'init', target: tgt, sliceElement:el, sliceEventSource:tgt })
else
el.value = sliceXPath( attr(el,'slice') )
}
}
});
this.#inTransform = 0;
};
transform();
applySlices();
}
#applyAttribute(name, newValue)
{ Iif( 'value' === name )
this.value = newValue;
const attrs = this.xml.querySelector('attributes');
let a = this.xml.querySelector(`attributes>${name}`);
if( a )
emptyNode(a).append( createText(a,newValue) );
else
E{ a = create( name, newValue, this.xml );
attrs.append( a );
}
this.#inTransform || attrs.setAttribute(name,newValue);
this.dispatchEvent(new CustomEvent('change', { bubbles: true,detail: { [name]: newValue }}))
}
attributeChangedCallback(name, oldValue, newValue)
{ if( !this.xml || this.#inTransform )
return;
this.#applyAttribute(name, newValue);
this.transform(); // needs throttling
}
get dce(){ return dce }
}
const registerTag = tag =>
{
Eif( window.customElements.get(tag) !== DceElement )
window.customElements.define( tag, DceElement);
};
if(tag)
registerTag(tag);
else
{ const t = tagName;
this.setAttribute('tag', t );
registerTag(t);
const el = document.createElement(t);
this.getAttributeNames().forEach(a=>el.setAttribute(a,this.getAttribute(a)));
el.append(...[...this.childNodes].filter( e => e.localName!=='style') );
this.append(el);
}
}
get templateNode(){ return this.firstElementChild?.tagName === 'TEMPLATE'? this.firstElementChild.content : this }
get dce(){ return this }
get xslt(){ return xml2dom( this.xsltString ) }
}
window.customElements.define( 'custom-element', CustomElement );
export default CustomElement;
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