less/lib/less/visitors/set-tree-visibility-visitor.js

Leaner CSS

var SetTreeVisibilityVisitor = function(visible) {
    this.visible = visible;
};
SetTreeVisibilityVisitor.prototype.run = function(root) {
    this.visit(root);
};
SetTreeVisibilityVisitor.prototype.visitArray = function(nodes) {
    if (!nodes) {
        return nodes;
    }

    var cnt = nodes.length, i;
    for (i = 0; i < cnt; i++) {
        this.visit(nodes[i]);
    }
    return nodes;
};
SetTreeVisibilityVisitor.prototype.visit = function(node) {
    if (!node) {
        return node;
    }
    if (node.constructor === Array) {
        return this.visitArray(node);
    }

    if (!node.blocksVisibility || node.blocksVisibility()) {
        return node;
    }
    if (this.visible) {
        node.ensureVisibility();
    } else {
        node.ensureInvisibility();
    }

    node.accept(this);
    return node;
};
module.exports = SetTreeVisibilityVisitor;