visual-dom-diff/lib/domIterator.js

Highlight differences between two DOM trees.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var DomIterator = /** @class */ (function () {
    function DomIterator(rootNode, config) {
        this.rootNode = rootNode;
        this.config = config;
        this.descend = true;
        this.nextNode = this.rootNode;
        if (this.skipSelf(this.nextNode)) {
            this.next();
        }
    }
    DomIterator.prototype.toArray = function () {
        var _a;
        var array = [];
        var _b = this.next(), done = _b.done, value = _b.value;
        while (!done) {
            array.push(value);
            (_a = this.next(), done = _a.done, value = _a.value);
        }
        return array;
    };
    DomIterator.prototype.forEach = function (fn) {
        var _a;
        var _b = this.next(), done = _b.done, value = _b.value;
        while (!done) {
            fn(value);
            (_a = this.next(), done = _a.done, value = _a.value);
        }
    };
    DomIterator.prototype.reduce = function (fn, initial) {
        var _a;
        var result = initial;
        var _b = this.next(), done = _b.done, value = _b.value;
        while (!done) {
            result = fn(result, value);
            (_a = this.next(), done = _a.done, value = _a.value);
        }
        return result;
    };
    DomIterator.prototype.some = function (fn) {
        var _a;
        var _b = this.next(), done = _b.done, value = _b.value;
        while (!done) {
            if (fn(value)) {
                return true;
            }
            ;
            (_a = this.next(), done = _a.done, value = _a.value);
        }
        return false;
    };
    DomIterator.prototype.next = function () {
        if (!this.nextNode) {
            return { done: true, value: this.rootNode };
        }
        var value = this.nextNode;
        var done = false;
        if (this.descend &&
            this.nextNode.firstChild &&
            !this.skipChildren(this.nextNode)) {
            this.nextNode = this.nextNode.firstChild;
        }
        else if (this.nextNode === this.rootNode) {
            this.nextNode = null;
        }
        else if (this.nextNode.nextSibling) {
            this.nextNode = this.nextNode.nextSibling;
            this.descend = true;
        }
        else {
            this.nextNode = this.nextNode.parentNode;
            this.descend = false;
            this.next(); // Skip this node, as we've visited it already.
        }
        if (this.nextNode && this.skipSelf(this.nextNode)) {
            this.next(); // Skip this node, as directed by the config.
        }
        return { done: done, value: value };
    };
    DomIterator.prototype.skipSelf = function (node) {
        return this.config && this.config.skipSelf
            ? this.config.skipSelf(node)
            : false;
    };
    DomIterator.prototype.skipChildren = function (node) {
        return this.config && this.config.skipChildren
            ? this.config.skipChildren(node)
            : false;
    };
    return DomIterator;
}());
exports.DomIterator = DomIterator;