diff options
Diffstat (limited to 'tools/node_modules/eslint/node_modules/unist-util-visit/index.js')
-rw-r--r-- | tools/node_modules/eslint/node_modules/unist-util-visit/index.js | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/tools/node_modules/eslint/node_modules/unist-util-visit/index.js b/tools/node_modules/eslint/node_modules/unist-util-visit/index.js new file mode 100644 index 0000000000..d51a97513b --- /dev/null +++ b/tools/node_modules/eslint/node_modules/unist-util-visit/index.js @@ -0,0 +1,55 @@ +'use strict'; + +/* Expose. */ +module.exports = visit; + +var is = require('unist-util-is'); + +/* Visit. */ +function visit(tree, test, visitor, reverse) { + if (typeof test === 'function' && typeof visitor !== 'function') { + reverse = visitor; + visitor = test; + test = null; + } + + one(tree); + + /* Visit a single node. */ + function one(node, index, parent) { + var result; + + index = index || (parent ? 0 : null); + + if (!test || node.type === test || is(test, node, index, parent || null)) { + result = visitor(node, index, parent || null); + } + + if (node.children && result !== false) { + return all(node.children, node); + } + + return result; + } + + /* Visit children in `parent`. */ + function all(children, parent) { + var step = reverse ? -1 : 1; + var max = children.length; + var min = -1; + var index = (reverse ? max : min) + step; + var child; + + while (index > min && index < max) { + child = children[index]; + + if (child && one(child, index, parent) === false) { + return false; + } + + index += step; + } + + return true; + } +} |