%PDF-
%PDF-
Mini Shell
Mini Shell
"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
var tree_1 = __importDefault(require("../tree"));
var _visitArgs = { visitDeeper: true };
var _hasIndexed = false;
function _noop(node) {
return node;
}
function indexNodeTypes(parent, ticker) {
// add .typeIndex to tree node types for lookup table
var key;
var child;
for (key in parent) {
/* eslint guard-for-in: 0 */
child = parent[key];
switch (typeof child) {
case 'function':
// ignore bound functions directly on tree which do not have a prototype
// or aren't nodes
if (child.prototype && child.prototype.type) {
child.prototype.typeIndex = ticker++;
}
break;
case 'object':
ticker = indexNodeTypes(child, ticker);
break;
}
}
return ticker;
}
var Visitor = /** @class */ (function () {
function Visitor(implementation) {
this._implementation = implementation;
this._visitInCache = {};
this._visitOutCache = {};
if (!_hasIndexed) {
indexNodeTypes(tree_1.default, 1);
_hasIndexed = true;
}
}
Visitor.prototype.visit = function (node) {
if (!node) {
return node;
}
var nodeTypeIndex = node.typeIndex;
if (!nodeTypeIndex) {
// MixinCall args aren't a node type?
if (node.value && node.value.typeIndex) {
this.visit(node.value);
}
return node;
}
var impl = this._implementation;
var func = this._visitInCache[nodeTypeIndex];
var funcOut = this._visitOutCache[nodeTypeIndex];
var visitArgs = _visitArgs;
var fnName;
visitArgs.visitDeeper = true;
if (!func) {
fnName = "visit" + node.type;
func = impl[fnName] || _noop;
funcOut = impl[fnName + "Out"] || _noop;
this._visitInCache[nodeTypeIndex] = func;
this._visitOutCache[nodeTypeIndex] = funcOut;
}
if (func !== _noop) {
var newNode = func.call(impl, node, visitArgs);
if (node && impl.isReplacing) {
node = newNode;
}
}
if (visitArgs.visitDeeper && node) {
if (node.length) {
for (var i = 0, cnt = node.length; i < cnt; i++) {
if (node[i].accept) {
node[i].accept(this);
}
}
}
else if (node.accept) {
node.accept(this);
}
}
if (funcOut != _noop) {
funcOut.call(impl, node);
}
return node;
};
Visitor.prototype.visitArray = function (nodes, nonReplacing) {
if (!nodes) {
return nodes;
}
var cnt = nodes.length;
var i;
// Non-replacing
if (nonReplacing || !this._implementation.isReplacing) {
for (i = 0; i < cnt; i++) {
this.visit(nodes[i]);
}
return nodes;
}
// Replacing
var out = [];
for (i = 0; i < cnt; i++) {
var evald = this.visit(nodes[i]);
if (evald === undefined) {
continue;
}
if (!evald.splice) {
out.push(evald);
}
else if (evald.length) {
this.flatten(evald, out);
}
}
return out;
};
Visitor.prototype.flatten = function (arr, out) {
if (!out) {
out = [];
}
var cnt;
var i;
var item;
var nestedCnt;
var j;
var nestedItem;
for (i = 0, cnt = arr.length; i < cnt; i++) {
item = arr[i];
if (item === undefined) {
continue;
}
if (!item.splice) {
out.push(item);
continue;
}
for (j = 0, nestedCnt = item.length; j < nestedCnt; j++) {
nestedItem = item[j];
if (nestedItem === undefined) {
continue;
}
if (!nestedItem.splice) {
out.push(nestedItem);
}
else if (nestedItem.length) {
this.flatten(nestedItem, out);
}
}
}
return out;
};
return Visitor;
}());
exports.default = Visitor;
//# sourceMappingURL=visitor.js.map
Zerion Mini Shell 1.0