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author | Florian Dold <florian.dold@gmail.com> | 2017-08-14 05:01:11 +0200 |
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committer | Florian Dold <florian.dold@gmail.com> | 2017-08-14 05:02:09 +0200 |
commit | 363723fc84f7b8477592e0105aeb331ec9a017af (patch) | |
tree | 29f92724f34131bac64d6a318dd7e30612e631c7 /node_modules/snapdragon-util/index.js | |
parent | 5634e77ad96bfe1818f6b6ee70b7379652e5487f (diff) | |
download | wallet-core-363723fc84f7b8477592e0105aeb331ec9a017af.tar.xz |
node_modules
Diffstat (limited to 'node_modules/snapdragon-util/index.js')
-rw-r--r-- | node_modules/snapdragon-util/index.js | 1019 |
1 files changed, 1019 insertions, 0 deletions
diff --git a/node_modules/snapdragon-util/index.js b/node_modules/snapdragon-util/index.js new file mode 100644 index 000000000..68a030ec1 --- /dev/null +++ b/node_modules/snapdragon-util/index.js @@ -0,0 +1,1019 @@ +'use strict'; + +var typeOf = require('kind-of'); +var utils = module.exports; + +/** + * Returns true if the given value is a node. + * + * ```js + * var Node = require('snapdragon-node'); + * var node = new Node({type: 'foo'}); + * console.log(utils.isNode(node)); //=> true + * console.log(utils.isNode({})); //=> false + * ``` + * @param {Object} `node` Instance of [snapdragon-node][] + * @returns {Boolean} + * @api public + */ + +utils.isNode = function(node) { + return typeOf(node) === 'object' && node.isNode === true; +}; + +/** + * Emit an empty string for the given `node`. + * + * ```js + * // do nothing for beginning-of-string + * snapdragon.compiler.set('bos', utils.noop); + * ``` + * @param {Object} `node` Instance of [snapdragon-node][] + * @returns {undefined} + * @api public + */ + +utils.noop = function(node) { + append(this, '', node); +}; + +/** + * Appdend `node.val` to `compiler.output`, exactly as it was created + * by the parser. + * + * ```js + * snapdragon.compiler.set('text', utils.identity); + * ``` + * @param {Object} `node` Instance of [snapdragon-node][] + * @returns {undefined} + * @api public + */ + +utils.identity = function(node) { + append(this, node.val, node); +}; + +/** + * Previously named `.emit`, this method appends the given `val` + * to `compiler.output` for the given node. Useful when you know + * what value should be appended advance, regardless of the actual + * value of `node.val`. + * + * ```js + * snapdragon.compiler + * .set('i', function(node) { + * this.mapVisit(node); + * }) + * .set('i.open', utils.append('<i>')) + * .set('i.close', utils.append('</i>')) + * ``` + * @param {Object} `node` Instance of [snapdragon-node][] + * @returns {Function} Returns a compiler middleware function. + * @api public + */ + +utils.append = function(val) { + return function(node) { + append(this, val, node); + }; +}; + +/** + * Used in compiler middleware, this onverts an AST node into + * an empty `text` node and deletes `node.nodes` if it exists. + * The advantage of this method is that, as opposed to completely + * removing the node, indices will not need to be re-calculated + * in sibling nodes, and nothing is appended to the output. + * + * ```js + * utils.toNoop(node); + * // convert `node.nodes` to the given value instead of deleting it + * utils.toNoop(node, []); + * ``` + * @param {Object} `node` Instance of [snapdragon-node][] + * @param {Array} `nodes` Optionally pass a new `nodes` value, to replace the existing `node.nodes` array. + * @api public + */ + +utils.toNoop = function(node, nodes) { + if (nodes) { + node.nodes = nodes; + } else { + delete node.nodes; + node.type = 'text'; + node.val = ''; + } +}; + +/** + * Visit `node` with the given `fn`. The built-in `.visit` method in snapdragon + * automatically calls registered compilers, this allows you to pass a visitor + * function. + * + * ```js + * snapdragon.compiler.set('i', function(node) { + * utils.visit(node, function(childNode) { + * // do stuff with "childNode" + * return childNode; + * }); + * }); + * ``` + * @param {Object} `node` Instance of [snapdragon-node][] + * @param {Function} `fn` + * @return {Object} returns the node after recursively visiting all child nodes. + * @api public + */ + +utils.visit = function(node, fn) { + assert(utils.isNode(node), 'expected node to be an instance of Node'); + assert(isFunction(fn), 'expected a visitor function'); + fn(node); + return node.nodes ? utils.mapVisit(node, fn) : node; +}; + +/** + * Map [visit](#visit) the given `fn` over `node.nodes`. This is called by + * [visit](#visit), use this method if you do not want `fn` to be called on + * the first node. + * + * ```js + * snapdragon.compiler.set('i', function(node) { + * utils.mapVisit(node, function(childNode) { + * // do stuff with "childNode" + * return childNode; + * }); + * }); + * ``` + * @param {Object} `node` Instance of [snapdragon-node][] + * @param {Object} `options` + * @param {Function} `fn` + * @return {Object} returns the node + * @api public + */ + +utils.mapVisit = function(node, fn) { + assert(utils.isNode(node), 'expected node to be an instance of Node'); + assert(isArray(node.nodes), 'expected node.nodes to be an array'); + assert(isFunction(fn), 'expected a visitor function'); + + for (var i = 0; i < node.nodes.length; i++) { + utils.visit(node.nodes[i], fn); + } + return node; +}; + +/** + * Unshift an `*.open` node onto `node.nodes`. + * + * ```js + * var Node = require('snapdragon-node'); + * snapdragon.parser.set('brace', function(node) { + * var match = this.match(/^{/); + * if (match) { + * var parent = new Node({type: 'brace'}); + * utils.addOpen(parent, Node); + * console.log(parent.nodes[0]): + * // { type: 'brace.open', val: '' }; + * + * // push the parent "brace" node onto the stack + * this.push(parent); + * + * // return the parent node, so it's also added to the AST + * return brace; + * } + * }); + * ``` + * @param {Object} `node` Instance of [snapdragon-node][] + * @param {Function} `Node` (required) Node constructor function from [snapdragon-node][]. + * @param {Function} `filter` Optionaly specify a filter function to exclude the node. + * @return {Object} Returns the created opening node. + * @api public + */ + +utils.addOpen = function(node, Node, val, filter) { + assert(utils.isNode(node), 'expected node to be an instance of Node'); + assert(isFunction(Node), 'expected Node to be a constructor function'); + + if (typeof val === 'function') { + filter = val; + val = ''; + } + + if (typeof filter === 'function' && !filter(node)) return; + var open = new Node({ type: node.type + '.open', val: val}); + var unshift = node.unshift || node.unshiftNode; + if (typeof unshift === 'function') { + unshift.call(node, open); + } else { + utils.unshiftNode(node, open); + } + return open; +}; + +/** + * Push a `*.close` node onto `node.nodes`. + * + * ```js + * var Node = require('snapdragon-node'); + * snapdragon.parser.set('brace', function(node) { + * var match = this.match(/^}/); + * if (match) { + * var parent = this.parent(); + * if (parent.type !== 'brace') { + * throw new Error('missing opening: ' + '}'); + * } + * + * utils.addClose(parent, Node); + * console.log(parent.nodes[parent.nodes.length - 1]): + * // { type: 'brace.close', val: '' }; + * + * // no need to return a node, since the parent + * // was already added to the AST + * return; + * } + * }); + * ``` + * @param {Object} `node` Instance of [snapdragon-node][] + * @param {Function} `Node` (required) Node constructor function from [snapdragon-node][]. + * @param {Function} `filter` Optionaly specify a filter function to exclude the node. + * @return {Object} Returns the created closing node. + * @api public + */ + +utils.addClose = function(node, Node, val, filter) { + assert(utils.isNode(node), 'expected node to be an instance of Node'); + assert(isFunction(Node), 'expected Node to be a constructor function'); + + if (typeof val === 'function') { + filter = val; + val = ''; + } + + if (typeof filter === 'function' && !filter(node)) return; + var close = new Node({ type: node.type + '.close', val: val}); + var push = node.push || node.pushNode; + if (typeof push === 'function') { + push.call(node, close); + } else { + utils.pushNode(node, close); + } + return close; +}; + +/** + * Wraps the given `node` with `*.open` and `*.close` nodes. + * + * @param {Object} `node` Instance of [snapdragon-node][] + * @param {Function} `Node` (required) Node constructor function from [snapdragon-node][]. + * @param {Function} `filter` Optionaly specify a filter function to exclude the node. + * @return {Object} Returns the node + * @api public + */ + +utils.wrapNodes = function(node, Node, filter) { + assert(utils.isNode(node), 'expected node to be an instance of Node'); + assert(isFunction(Node), 'expected Node to be a constructor function'); + + utils.addOpen(node, Node, filter); + utils.addClose(node, Node, filter); + return node; +}; + +/** + * Push the given `node` onto `parent.nodes`, and set `parent` as `node.parent. + * + * ```js + * var parent = new Node({type: 'foo'}); + * var node = new Node({type: 'bar'}); + * utils.pushNode(parent, node); + * console.log(parent.nodes[0].type) // 'bar' + * console.log(node.parent.type) // 'foo' + * ``` + * @param {Object} `parent` + * @param {Object} `node` Instance of [snapdragon-node][] + * @return {Object} Returns the child node + * @api public + */ + +utils.pushNode = function(parent, node) { + assert(utils.isNode(parent), 'expected parent node to be an instance of Node'); + assert(utils.isNode(node), 'expected node to be an instance of Node'); + + node.define('parent', parent); + parent.nodes = parent.nodes || []; + parent.nodes.push(node); + return node; +}; + +/** + * Unshift `node` onto `parent.nodes`, and set `parent` as `node.parent. + * + * ```js + * var parent = new Node({type: 'foo'}); + * var node = new Node({type: 'bar'}); + * utils.unshiftNode(parent, node); + * console.log(parent.nodes[0].type) // 'bar' + * console.log(node.parent.type) // 'foo' + * ``` + * @param {Object} `parent` + * @param {Object} `node` Instance of [snapdragon-node][] + * @return {undefined} + * @api public + */ + +utils.unshiftNode = function(parent, node) { + assert(utils.isNode(parent), 'expected parent node to be an instance of Node'); + assert(utils.isNode(node), 'expected node to be an instance of Node'); + + node.define('parent', parent); + parent.nodes = parent.nodes || []; + parent.nodes.unshift(node); +}; + +/** + * Pop the last `node` off of `parent.nodes`. The advantage of + * using this method is that it checks for `node.nodes` and works + * with any version of `snapdragon-node`. + * + * ```js + * var parent = new Node({type: 'foo'}); + * utils.pushNode(parent, new Node({type: 'foo'})); + * utils.pushNode(parent, new Node({type: 'bar'})); + * utils.pushNode(parent, new Node({type: 'baz'})); + * console.log(parent.nodes.length); //=> 3 + * utils.popNode(parent); + * console.log(parent.nodes.length); //=> 2 + * ``` + * @param {Object} `parent` + * @param {Object} `node` Instance of [snapdragon-node][] + * @return {Number|Undefined} Returns the length of `node.nodes` or undefined. + * @api public + */ + +utils.popNode = function(node) { + assert(utils.isNode(node), 'expected node to be an instance of Node'); + if (typeof node.pop === 'function') { + return node.pop(); + } + return node.nodes && node.nodes.pop(); +}; + +/** + * Shift the first `node` off of `parent.nodes`. The advantage of + * using this method is that it checks for `node.nodes` and works + * with any version of `snapdragon-node`. + * + * ```js + * var parent = new Node({type: 'foo'}); + * utils.pushNode(parent, new Node({type: 'foo'})); + * utils.pushNode(parent, new Node({type: 'bar'})); + * utils.pushNode(parent, new Node({type: 'baz'})); + * console.log(parent.nodes.length); //=> 3 + * utils.shiftNode(parent); + * console.log(parent.nodes.length); //=> 2 + * ``` + * @param {Object} `parent` + * @param {Object} `node` Instance of [snapdragon-node][] + * @return {Number|Undefined} Returns the length of `node.nodes` or undefined. + * @api public + */ + +utils.shiftNode = function(node) { + assert(utils.isNode(node), 'expected node to be an instance of Node'); + if (typeof node.shift === 'function') { + return node.shift(); + } + return node.nodes && node.nodes.shift(); +}; + +/** + * Remove the specified `node` from `parent.nodes`. + * + * ```js + * var parent = new Node({type: 'abc'}); + * var foo = new Node({type: 'foo'}); + * utils.pushNode(parent, foo); + * utils.pushNode(parent, new Node({type: 'bar'})); + * utils.pushNode(parent, new Node({type: 'baz'})); + * console.log(parent.nodes.length); //=> 3 + * utils.removeNode(parent, foo); + * console.log(parent.nodes.length); //=> 2 + * ``` + * @param {Object} `parent` + * @param {Object} `node` Instance of [snapdragon-node][] + * @return {Object|undefined} Returns the removed node, if successful, or undefined if it does not exist on `parent.nodes`. + * @api public + */ + +utils.removeNode = function(parent, node) { + assert(utils.isNode(parent), 'expected parent.node to be an instance of Node'); + assert(utils.isNode(node), 'expected node to be an instance of Node'); + + if (!parent.nodes) { + return null; + } + + if (typeof parent.remove === 'function') { + return parent.remove(node); + } + + var idx = parent.nodes.indexOf(node); + if (idx !== -1) { + return parent.nodes.splice(idx, 1); + } +}; + +/** + * Returns true if `node.type` matches the given `type`. Throws a + * `TypeError` if `node` is not an instance of `Node`. + * + * ```js + * var Node = require('snapdragon-node'); + * var node = new Node({type: 'foo'}); + * console.log(utils.isType(node, 'foo')); // false + * console.log(utils.isType(node, 'bar')); // true + * ``` + * @param {Object} `node` Instance of [snapdragon-node][] + * @param {String} `type` + * @return {Boolean} + * @api public + */ + +utils.isType = function(node, type) { + assert(utils.isNode(node), 'expected node to be an instance of Node'); + switch (typeOf(type)) { + case 'array': + var types = type.slice(); + for (var i = 0; i < types.length; i++) { + if (utils.isType(node, types[i])) { + return true; + } + } + return false; + case 'string': + return node.type === type; + case 'regexp': + return type.test(node.type); + default: { + throw new TypeError('expected "type" to be an array, string or regexp'); + } + } +}; + +/** + * Returns true if the given `node` has the given `type` in `node.nodes`. + * Throws a `TypeError` if `node` is not an instance of `Node`. + * + * ```js + * var Node = require('snapdragon-node'); + * var node = new Node({ + * type: 'foo', + * nodes: [ + * new Node({type: 'bar'}), + * new Node({type: 'baz'}) + * ] + * }); + * console.log(utils.hasType(node, 'xyz')); // false + * console.log(utils.hasType(node, 'baz')); // true + * ``` + * @param {Object} `node` Instance of [snapdragon-node][] + * @param {String} `type` + * @return {Boolean} + * @api public + */ + +utils.hasType = function(node, type) { + assert(utils.isNode(node), 'expected node to be an instance of Node'); + if (!Array.isArray(node.nodes)) return false; + for (var i = 0; i < node.nodes.length; i++) { + if (utils.isType(node.nodes[i], type)) { + return true; + } + } + return false; +}; + +/** + * Returns the first node from `node.nodes` of the given `type` + * + * ```js + * var node = new Node({ + * type: 'foo', + * nodes: [ + * new Node({type: 'text', val: 'abc'}), + * new Node({type: 'text', val: 'xyz'}) + * ] + * }); + * + * var textNode = utils.firstOfType(node.nodes, 'text'); + * console.log(textNode.val); + * //=> 'abc' + * ``` + * @param {Array} `nodes` + * @param {String} `type` + * @return {Object|undefined} Returns the first matching node or undefined. + * @api public + */ + +utils.firstOfType = function(nodes, type) { + for (var i = 0; i < nodes.length; i++) { + var node = nodes[i]; + if (utils.isType(node, type)) { + return node; + } + } +}; + +/** + * Returns the node at the specified index, or the first node of the + * given `type` from `node.nodes`. + * + * ```js + * var node = new Node({ + * type: 'foo', + * nodes: [ + * new Node({type: 'text', val: 'abc'}), + * new Node({type: 'text', val: 'xyz'}) + * ] + * }); + * + * var nodeOne = utils.findNode(node.nodes, 'text'); + * console.log(nodeOne.val); + * //=> 'abc' + * + * var nodeTwo = utils.findNode(node.nodes, 1); + * console.log(nodeTwo.val); + * //=> 'xyz' + * ``` + * + * @param {Array} `nodes` + * @param {String|Number} `type` Node type or index. + * @return {Object} Returns a node or undefined. + * @api public + */ + +utils.findNode = function(nodes, type) { + if (!Array.isArray(nodes)) { + return null; + } + if (typeof type === 'number') { + return nodes[type]; + } + return utils.firstOfType(nodes, type); +}; + +/** + * Returns true if the given node is an "*.open" node. + * + * ```js + * var Node = require('snapdragon-node'); + * var brace = new Node({type: 'brace'}); + * var open = new Node({type: 'brace.open'}); + * var close = new Node({type: 'brace.close'}); + * + * console.log(utils.isOpen(brace)); // false + * console.log(utils.isOpen(open)); // true + * console.log(utils.isOpen(close)); // false + * ``` + * @param {Object} `node` Instance of [snapdragon-node][] + * @return {Boolean} + * @api public + */ + +utils.isOpen = function(node) { + assert(utils.isNode(node), 'expected node to be an instance of Node'); + return node.type.slice(-5) === '.open'; +}; + +/** + * Returns true if the given node is a "*.close" node. + * + * ```js + * var Node = require('snapdragon-node'); + * var brace = new Node({type: 'brace'}); + * var open = new Node({type: 'brace.open'}); + * var close = new Node({type: 'brace.close'}); + * + * console.log(utils.isClose(brace)); // false + * console.log(utils.isClose(open)); // false + * console.log(utils.isClose(close)); // true + * ``` + * @param {Object} `node` Instance of [snapdragon-node][] + * @return {Boolean} + * @api public + */ + +utils.isClose = function(node) { + assert(utils.isNode(node), 'expected node to be an instance of Node'); + return node.type.slice(-6) === '.close'; +}; + +/** + * Returns true if `node.nodes` **has** an `.open` node + * + * ```js + * var Node = require('snapdragon-node'); + * var brace = new Node({ + * type: 'brace', + * nodes: [] + * }); + * + * var open = new Node({type: 'brace.open'}); + * console.log(utils.hasOpen(brace)); // false + * + * brace.pushNode(open); + * console.log(utils.hasOpen(brace)); // true + * ``` + * @param {Object} `node` Instance of [snapdragon-node][] + * @return {Boolean} + * @api public + */ + +utils.hasOpen = function(node) { + assert(utils.isNode(node), 'expected node to be an instance of Node'); + var first = node.first || node.nodes ? node.nodes[0] : null; + if (utils.isNode(first)) { + return first.type === node.type + '.open'; + } + return false; +}; + +/** + * Returns true if `node.nodes` **has** a `.close` node + * + * ```js + * var Node = require('snapdragon-node'); + * var brace = new Node({ + * type: 'brace', + * nodes: [] + * }); + * + * var close = new Node({type: 'brace.close'}); + * console.log(utils.hasClose(brace)); // false + * + * brace.pushNode(close); + * console.log(utils.hasClose(brace)); // true + * ``` + * @param {Object} `node` Instance of [snapdragon-node][] + * @return {Boolean} + * @api public + */ + +utils.hasClose = function(node) { + assert(utils.isNode(node), 'expected node to be an instance of Node'); + var last = node.last || node.nodes ? node.nodes[node.nodes.length - 1] : null; + if (utils.isNode(last)) { + return last.type === node.type + '.close'; + } + return false; +}; + +/** + * Returns true if `node.nodes` has both `.open` and `.close` nodes + * + * ```js + * var Node = require('snapdragon-node'); + * var brace = new Node({ + * type: 'brace', + * nodes: [] + * }); + * + * var open = new Node({type: 'brace.open'}); + * var close = new Node({type: 'brace.close'}); + * console.log(utils.hasOpen(brace)); // false + * console.log(utils.hasClose(brace)); // false + * + * brace.pushNode(open); + * brace.pushNode(close); + * console.log(utils.hasOpen(brace)); // true + * console.log(utils.hasClose(brace)); // true + * ``` + * @param {Object} `node` Instance of [snapdragon-node][] + * @return {Boolean} + * @api public + */ + +utils.hasOpenAndClose = function(node) { + return utils.hasOpen(node) && utils.hasClose(node); +}; + +/** + * Push the given `node` onto the `state.inside` array for the + * given type. This array is used as a specialized "stack" for + * only the given `node.type`. + * + * ```js + * var state = { inside: {}}; + * var node = new Node({type: 'brace'}); + * utils.addType(state, node); + * console.log(state.inside); + * //=> { brace: [{type: 'brace'}] } + * ``` + * @param {Object} `state` The `compiler.state` object or custom state object. + * @param {Object} `node` Instance of [snapdragon-node][] + * @return {Array} Returns the `state.inside` stack for the given type. + * @api public + */ + +utils.addType = function(state, node) { + assert(utils.isNode(node), 'expected node to be an instance of Node'); + assert(isObject(state), 'expected state to be an object'); + + var type = node.parent + ? node.parent.type + : node.type.replace(/\.open$/, ''); + + if (!state.hasOwnProperty('inside')) { + state.inside = {}; + } + if (!state.inside.hasOwnProperty(type)) { + state.inside[type] = []; + } + + var arr = state.inside[type]; + arr.push(node); + return arr; +}; + +/** + * Remove the given `node` from the `state.inside` array for the + * given type. This array is used as a specialized "stack" for + * only the given `node.type`. + * + * ```js + * var state = { inside: {}}; + * var node = new Node({type: 'brace'}); + * utils.addType(state, node); + * console.log(state.inside); + * //=> { brace: [{type: 'brace'}] } + * utils.removeType(state, node); + * //=> { brace: [] } + * ``` + * @param {Object} `state` The `compiler.state` object or custom state object. + * @param {Object} `node` Instance of [snapdragon-node][] + * @return {Array} Returns the `state.inside` stack for the given type. + * @api public + */ + +utils.removeType = function(state, node) { + assert(utils.isNode(node), 'expected node to be an instance of Node'); + assert(isObject(state), 'expected state to be an object'); + + var type = node.parent + ? node.parent.type + : node.type.replace(/\.close$/, ''); + + if (state.inside.hasOwnProperty(type)) { + return state.inside[type].pop(); + } +}; + +/** + * Returns true if `node.val` is an empty string, or `node.nodes` does + * not contain any non-empty text nodes. + * + * ```js + * var node = new Node({type: 'text'}); + * utils.isEmpty(node); //=> true + * node.val = 'foo'; + * utils.isEmpty(node); //=> false + * ``` + * @param {Object} `node` Instance of [snapdragon-node][] + * @param {Function} `fn` + * @return {Boolean} + * @api public + */ + +utils.isEmpty = function(node, fn) { + assert(utils.isNode(node), 'expected node to be an instance of Node'); + + if (!Array.isArray(node.nodes)) { + if (node.type !== 'text') { + return true; + } + if (typeof fn === 'function') { + return fn(node, node.parent); + } + return !utils.trim(node.val); + } + + for (var i = 0; i < node.nodes.length; i++) { + var child = node.nodes[i]; + if (utils.isOpen(child) || utils.isClose(child)) { + continue; + } + if (!utils.isEmpty(child, fn)) { + return false; + } + } + + return true; +}; + +/** + * Returns true if the `state.inside` stack for the given type exists + * and has one or more nodes on it. + * + * ```js + * var state = { inside: {}}; + * var node = new Node({type: 'brace'}); + * console.log(utils.isInsideType(state, 'brace')); //=> false + * utils.addType(state, node); + * console.log(utils.isInsideType(state, 'brace')); //=> true + * utils.removeType(state, node); + * console.log(utils.isInsideType(state, 'brace')); //=> false + * ``` + * @param {Object} `state` + * @param {String} `type` + * @return {Boolean} + * @api public + */ + +utils.isInsideType = function(state, type) { + assert(isObject(state), 'expected state to be an object'); + assert(isString(type), 'expected type to be a string'); + + if (!state.hasOwnProperty('inside')) { + return false; + } + + if (!state.inside.hasOwnProperty(type)) { + return false; + } + + return state.inside[type].length > 0; +}; + +/** + * Returns true if `node` is either a child or grand-child of the given `type`, + * or `state.inside[type]` is a non-empty array. + * + * ```js + * var state = { inside: {}}; + * var node = new Node({type: 'brace'}); + * var open = new Node({type: 'brace.open'}); + * console.log(utils.isInside(state, open, 'brace')); //=> false + * utils.pushNode(node, open); + * console.log(utils.isInside(state, open, 'brace')); //=> true + * ``` + * @param {Object} `state` Either the `compiler.state` object, if it exists, or a user-supplied state object. + * @param {Object} `node` Instance of [snapdragon-node][] + * @param {String} `type` The `node.type` to check for. + * @return {Boolean} + * @api public + */ + +utils.isInside = function(state, node, type) { + assert(utils.isNode(node), 'expected node to be an instance of Node'); + assert(isObject(state), 'expected state to be an object'); + + if (Array.isArray(type)) { + for (var i = 0; i < type.length; i++) { + if (utils.isInside(state, node, type[i])) { + return true; + } + } + return false; + } + + var parent = node.parent; + if (typeof type === 'string') { + return (parent && parent.type === type) || utils.isInsideType(state, type); + } + + if (typeOf(type) === 'regexp') { + if (parent && parent.type && type.test(parent.type)) { + return true; + } + + var keys = Object.keys(state.inside); + var len = keys.length; + var idx = -1; + while (++idx < len) { + var key = keys[idx]; + var val = state.inside[key]; + + if (Array.isArray(val) && val.length !== 0 && type.test(key)) { + return true; + } + } + } + return false; +}; + +/** + * Get the last `n` element from the given `array`. Used for getting + * a node from `node.nodes.` + * + * @param {Array} `array` + * @param {Number} `n` + * @return {undefined} + * @api public + */ + +utils.last = function(arr, n) { + return arr[arr.length - (n || 1)]; +}; + +/** + * Cast the given `val` to an array. + * + * ```js + * console.log(utils.arrayify('')); + * //=> [] + * console.log(utils.arrayify('foo')); + * //=> ['foo'] + * console.log(utils.arrayify(['foo'])); + * //=> ['foo'] + * ``` + * @param {any} `val` + * @return {Array} + * @api public + */ + +utils.arrayify = function(val) { + if (typeof val === 'string' && val !== '') { + return [val]; + } + if (!Array.isArray(val)) { + return []; + } + return val; +}; + +/** + * Convert the given `val` to a string by joining with `,`. Useful + * for creating a cheerio/CSS/DOM-style selector from a list of strings. + * + * @param {any} `val` + * @return {Array} + * @api public + */ + +utils.stringify = function(val) { + return utils.arrayify(val).join(','); +}; + +/** + * Ensure that the given value is a string and call `.trim()` on it, + * or return an empty string. + * + * @param {String} `str` + * @return {String} + * @api public + */ + +utils.trim = function(str) { + return typeof str === 'string' ? str.trim() : ''; +}; + +/** + * Return true if val is an object + */ + +function isObject(val) { + return typeOf(val) === 'object'; +} + +/** + * Return true if val is a string + */ + +function isString(val) { + return typeof val === 'string'; +} + +/** + * Return true if val is a function + */ + +function isFunction(val) { + return typeof val === 'function'; +} + +/** + * Return true if val is an array + */ + +function isArray(val) { + return Array.isArray(val); +} + +/** + * Shim to ensure the `.append` methods work with any version of snapdragon + */ + +function append(compiler, val, node) { + if (typeof compiler.append !== 'function') { + return compiler.emit(val, node); + } + return compiler.append(val, node); +} + +/** + * Simplified assertion. Throws an error is `val` is falsey. + */ + +function assert(val, message) { + if (!val) throw new Error(message); +} |