Function processRule

lib/restructure/8-restructRuleset.js:26–168

(node, item, list)

}

function processRule(node, item, list) {
    const avoidRulesMerge = this.block !== null ? this.block.avoidRulesMerge : false;
    const selectors = node.prelude.children;
    const block = node.block;
    const disallowDownMarkers = Object.create(null);
    let allowMergeUp = true;
    let allowMergeDown = true;

    list.prevUntil(item.prev, function(prev, prevItem) {
        const prevBlock = prev.block;
        const prevType = prev.type;

        if (prevType !== 'Rule') {
            const unsafe = unsafeToSkipNode.call(selectors, prev);

            if (!unsafe && prevType === 'Atrule' && prevBlock) {
                walk(prevBlock, {
                    visit: 'Rule',
                    enter(node) {
                        node.prelude.children.forEach((data) => {
                            disallowDownMarkers[data.compareMarker] = true;
                        });
                    }
                });
            }

            return unsafe;
        }

        if (node.pseudoSignature !== prev.pseudoSignature) {
            return true;
        }

        const prevSelectors = prev.prelude.children;

        allowMergeDown = !prevSelectors.some((selector) =>
            selector.compareMarker in disallowDownMarkers
        );

        // try prev ruleset if simpleselectors has no equal specifity and element selector
        if (!allowMergeDown && !allowMergeUp) {
            return true;
        }

        // try to join by selectors
        if (allowMergeUp && isEqualSelectors(prevSelectors, selectors)) {
            prevBlock.children.appendList(block.children);
            list.remove(item);

            return true;
        }

        // try to join by properties
        const diff = compareDeclarations(block.children, prevBlock.children);

        // console.log(diff.eq, diff.ne1, diff.ne2);

        if (diff.eq.length) {