You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
44 lines
1.6 KiB
44 lines
1.6 KiB
4 years ago
|
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
|
||
|
|
};
|
||
|
|
};
|