1 line
3.2 KiB
JavaScript
1 line
3.2 KiB
JavaScript
import e from"postcss-selector-parser";import{parse as r,addLayerToModel as t}from"@csstools/cascade-layer-name-parser";const s=r("csstools-implicit-layer")[0];function collectCascadeLayerOrder(e){const o=new Map,n=new Map,a=[];e.walkAtRules((e=>{var l;if("layer"!==e.name.toLowerCase())return;{let r=e.parent;for(;r;){if("atrule"!==r.type||"layer"!==r.name.toLowerCase()){if(r===e.root())break;return}r=r.parent}}let c;if(e.nodes)c=normalizeLayerName(e.params,1);else{if(!e.params.trim())return;c=e.params}let u=r(c);if(null!=(l=u)&&l.length){{let r=e.parent;for(;r&&"atrule"===r.type&&"layer"===r.name.toLowerCase();){const e=n.get(r);e?(u=u.map((r=>e.concat(r))),r=r.parent):r=r.parent}}if(t(a,u),e.nodes){const r=u[0].concat(s);o.set(e,r),n.set(e,u[0])}}}));for(const e of o.values())t(a,[e]);const l=new WeakMap;for(const[e,r]of o)l.set(e,a.findIndex((e=>r.equal(e))));return l}function normalizeLayerName(e,r){return e.trim()?e:"csstools-anon-layer--"+r++}const o=new Set(["scope","container","layer"]);function isProcessableCustomSelectorRule(e){if("atrule"!==e.type)return!1;if("custom-selector"!==e.name.toLowerCase())return!1;if(!e.params||!e.params.includes(":--"))return!1;if(e.nodes&&e.nodes.length>0)return!1;let r=e.parent;for(;r;){if("rule"===r.type)return!1;if("atrule"===r.type&&!o.has(r.name.toLowerCase()))return!1;r=r.parent}return!0}function getCustomSelectors(r,t,s){const o=new Map,n=new Map,a=collectCascadeLayerOrder(r);return r.walkAtRules((r=>{var l,c;if(isProcessableCustomSelectorRule(r))try{var u;const t=r.params.trim(),p=e().astSync(t),i=null==p||null==(u=p.nodes)||null==(u=u[0])||null==(u=u.nodes)?void 0:u[0];if(!i||"pseudo"!==i.type||!i.value.startsWith(":--"))return;const m=i.toString(),f=(c=a,(l=r).parent&&"atrule"===l.parent.type&&"layer"===l.parent.name.toLowerCase()?c.has(l.parent)?c.get(l.parent)+1:0:1e7),d=n.get(m)??-1;if(f&&f>=d&&(n.set(m,f),o.set(m,e().astSync(t.slice(m.length).trim()))),!s.preserve){const e=r.parent;r.remove(),removeEmptyAncestorBlocks(e)}}catch(e){r.warn(t,`Failed to parse custom selector : "${r.params}" with message: "${e.message}"`)}})),o}function removeEmptyAncestorBlocks(e){let r=e;for(;r;){if(r.nodes&&r.nodes.length>0)return;const e=r.parent;r.remove(),r=e}}function transformRule(r,t,s){let o=r.selector;try{o=e((r=>{r.walkPseudos((r=>{if(!s.has(r.value))return;const t=e.pseudo({value:":is",nodes:[]});s.get(r.value).each((e=>{t.append(e.clone({}))})),r.replaceWith(t)}))})).processSync(r.selector)}catch(e){return r.warn(t,`Failed to parse selector : "${o}" with message: "${e.message}"`),r.selector}return o}const creator=e=>{const r=Boolean(Object(e).preserve);if("importFrom"in Object(e))throw new Error('[postcss-custom-selectors] "importFrom" is no longer supported');if("exportTo"in Object(e))throw new Error('[postcss-custom-selectors] "exportTo" is no longer supported');return{postcssPlugin:"postcss-custom-selectors",prepare(){const e=new WeakSet;let t=new Map;return{Once:(e,{result:s})=>{t=getCustomSelectors(e,s,{preserve:r})},Rule:(s,{result:o})=>{var n;if(e.has(s))return;if(null==(n=s.selector)||!n.includes(":--"))return;const a=transformRule(s,o,t);a!==s.selector&&(e.add(s),s.cloneBefore({selector:a}),r||s.remove())}}}}};creator.postcss=!0;export{creator as default};
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