ajsfw/v-dom/lib/DomParser.js

Ajs Framework

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var Document_1 = require("./Document");
var OPEN_BRACKET = "<";
var OPEN_BRACKET_CC = "<".charCodeAt(0);
var CLOSE_BRACKET = ">";
var CLOSE_BRACKET_CC = ">".charCodeAt(0);
var MINUS_CC = "-".charCodeAt(0);
var SLASH_CC = "/".charCodeAt(0);
var EXCLAMATION_CC = "!".charCodeAt(0);
var SINGLE_QUOTE_CC = "'".charCodeAt(0);
var DOUBLE_QUOTE_CC = "\"".charCodeAt(0);
var UNPAIR_NODE_NAMES = ["IMG", "BR", "INPUT", "META", "LINK"];
var NAME_SPACER = "\n\t>/= ";
var DomParser = (function () {
    function DomParser(document) {
        this.__document = document || new Document_1.default();
    }
    Object.defineProperty(DomParser.prototype, "document", {
        get: function () { return this.__document; },
        enumerable: true,
        configurable: true
    });
    DomParser.prototype.parse = function (stream) {
        this.__pos = 0;
        this.__stream = stream;
        var rootNodes = [];
        while (this.__pos !== -1) {
            if (this.__stream[this.__pos] === OPEN_BRACKET) {
                var node = this.__parseNode();
                rootNodes.push(node);
            }
            else {
                this.__pos++;
            }
            if (this.__pos > this.__stream.length - 1) {
                this.__pos = -1;
            }
        }
        if (rootNodes.length > 1) {
            return rootNodes;
        }
        else {
            if (rootNodes.length === 1) {
                return rootNodes[0];
            }
            else {
                return null;
            }
        }
    };
    DomParser.prototype.__parseNode = function () {
        this.__pos++;
        var tagName = this.__parseName();
        var node = this.document.createElement(tagName);
        while (this.__stream.charCodeAt(this.__pos) !== CLOSE_BRACKET_CC && this.__stream[this.__pos]) {
            var c = this.__stream.charCodeAt(this.__pos);
            if ((c > 64 && c < 91) || (c > 96 && c < 123)) {
                var name_1 = this.__parseName();
                var code = this.__stream.charCodeAt(this.__pos);
                while (code &&
                    code !== SINGLE_QUOTE_CC &&
                    code !== DOUBLE_QUOTE_CC &&
                    !((code > 64 && code < 91) || (code > 96 && code < 123))
                    && code !== CLOSE_BRACKET_CC) {
                    this.__pos++;
                    code = this.__stream.charCodeAt(this.__pos);
                }
                var value = void 0;
                if (code === SINGLE_QUOTE_CC || code === DOUBLE_QUOTE_CC) {
                    value = this.__parseString();
                    if (this.__pos === -1) {
                        return node;
                    }
                }
                else {
                    value = null;
                    this.__pos--;
                }
                node.setAttribute(name_1, value);
            }
            this.__pos++;
        }
        if (this.__stream.charCodeAt(this.__pos - 1) === SLASH_CC) {
            this.__pos++;
            return node;
        }
        var start;
        switch (node.nodeName) {
            case "SCRIPT":
                start = this.__pos + 1;
                this.__pos = this.__stream.indexOf("</" + "script>", this.__pos);
                node.appendChild(this.__document.createTextNode(this.__stream.slice(start, this.__pos - 1)));
                this.__pos += 8;
                break;
            case "STYLE":
                start = this.__pos + 1;
                this.__pos = this.__stream.indexOf("</" + "style>", this.__pos);
                node.appendChild(this.__document.createTextNode(this.__stream.slice(start, this.__pos - 1)));
                this.__pos += 7;
                break;
            default:
                if (UNPAIR_NODE_NAMES.indexOf(node.nodeName) === -1) {
                    this.__pos++;
                    this.__parseChildren(node);
                }
                break;
        }
        return node;
    };
    DomParser.prototype.__parseChildren = function (parentNode) {
        while (this.__stream[this.__pos]) {
            if (this.__stream.charCodeAt(this.__pos + 1) === SLASH_CC) {
                this.__pos = this.__stream.indexOf(CLOSE_BRACKET, this.__pos);
                if (this.__pos + 1) {
                    this.__pos += 1;
                }
                return;
            }
            if (this.__stream.charCodeAt(this.__pos) !== OPEN_BRACKET_CC) {
                var text = this.__parseText();
                if (text.trim().length > 0) {
                    parentNode.appendChild(this.__document.createTextNode(text));
                }
                this.__pos++;
                continue;
            }
            if (this.__stream.charCodeAt(this.__pos + 1) === EXCLAMATION_CC) {
                if (this.__stream.charCodeAt(this.__pos + 2) === MINUS_CC) {
                    while (this.__pos !== -1 &&
                        !(this.__stream.charCodeAt(this.__pos) === CLOSE_BRACKET_CC &&
                            this.__stream.charCodeAt(this.__pos - 1) === MINUS_CC &&
                            this.__stream.charCodeAt(this.__pos - 2) === MINUS_CC && this.__pos !== -1)) {
                        this.__pos = this.__stream.indexOf(CLOSE_BRACKET, this.__pos + 1);
                    }
                    if (this.__pos === -1) {
                        this.__pos = this.__stream.length;
                    }
                }
                else {
                    this.__pos += 2;
                    while (this.__stream.charCodeAt(this.__pos) !== CLOSE_BRACKET_CC && this.__stream[this.__pos]) {
                        this.__pos++;
                    }
                }
                this.__pos++;
                continue;
            }
            var node = this.__parseNode();
            parentNode.appendChild(node);
        }
    };
    DomParser.prototype.__parseText = function () {
        var start = this.__pos;
        this.__pos = this.__stream.indexOf(OPEN_BRACKET, this.__pos) - 1;
        if (this.__pos === -2) {
            this.__pos = this.__stream.length;
        }
        return this.__stream.slice(start, this.__pos + 1);
    };
    DomParser.prototype.__parseName = function () {
        var start = this.__pos;
        while (NAME_SPACER.indexOf(this.__stream[this.__pos]) === -1 && this.__stream[this.__pos]) {
            this.__pos++;
        }
        return this.__stream.slice(start, this.__pos);
    };
    DomParser.prototype.__parseString = function () {
        var startChar = this.__stream[this.__pos];
        var startpos = ++this.__pos;
        this.__pos = this.__stream.indexOf(startChar, startpos);
        return this.__stream.slice(startpos, this.__pos);
    };
    return DomParser;
}());
exports.default = DomParser;