source control 1.1

Tomas

2022-05-19 957a1f10a06fdbb76f1a0ba94fe44126c613fee3

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var resolveKeyword = require('css-tree').keyword;
var walk = require('css-tree').walk;
var generate = require('css-tree').generate;
var createDeclarationIndexer = require('./createDeclarationIndexer');
var processSelector = require('./processSelector');
 
module.exports = function prepare(ast, options) {
    var markDeclaration = createDeclarationIndexer();
 
    walk(ast, {
        visit: 'Rule',
        enter: function processRule(node) {
            node.block.children.each(markDeclaration);
            processSelector(node, options.usage);
        }
    });
 
    walk(ast, {
        visit: 'Atrule',
        enter: function(node) {
            if (node.prelude) {
                node.prelude.id = null; // pre-init property to avoid multiple hidden class for generate
                node.prelude.id = generate(node.prelude);
            }
 
            // compare keyframe selectors by its values
            // NOTE: still no clarification about problems with keyframes selector grouping (issue #197)
            if (resolveKeyword(node.name).basename === 'keyframes') {
                node.block.avoidRulesMerge = true;  /* probably we don't need to prevent those merges for @keyframes
                                                       TODO: need to be checked */
                node.block.children.each(function(rule) {
                    rule.prelude.children.each(function(simpleselector) {
                        simpleselector.compareMarker = simpleselector.id;
                    });
                });
            }
        }
    });
 
    return {
        declaration: markDeclaration
    };
};