devextreme/dist/transpiled/core/utils/html_parser.js

HTML5 JavaScript Component Suite for Responsive Web Development

"use strict";

var merge = require("./array").merge,
    domAdapter = require("../dom_adapter");

var isTagName = /<([a-z][^\/\0>\x20\t\r\n\f]+)/i;

var tagWrappers = {
    default: {
        tagsCount: 0,
        startTags: "",
        endTags: ""
    },
    thead: {
        tagsCount: 1,
        startTags: "<table>",
        endTags: "</table>"
    },
    td: {
        tagsCount: 3,
        startTags: "<table><tbody><tr>",
        endTags: "</tr></tbody></table>"
    },
    col: {
        tagsCount: 2,
        startTags: "<table><colgroup>",
        endTags: "</colgroup></table>"
    },
    tr: {
        tagsCount: 2,
        startTags: "<table><tbody>",
        endTags: "</tbody></table>"
    }
};

tagWrappers.tbody = tagWrappers.colgroup = tagWrappers.caption = tagWrappers.tfoot = tagWrappers.thead;
tagWrappers.th = tagWrappers.td;

var parseHTML = function parseHTML(html) {
    if (typeof html !== "string") {
        return null;
    }

    var fragment = domAdapter.createDocumentFragment();
    var container = fragment.appendChild(domAdapter.createElement("div"));
    var tags = isTagName.exec(html);
    var firstRootTag = tags && tags[1].toLowerCase();
    var tagWrapper = tagWrappers[firstRootTag] || tagWrappers.default;

    container.innerHTML = tagWrapper.startTags + html + tagWrapper.endTags;

    for (var i = 0; i < tagWrapper.tagsCount; i++) {
        container = container.lastChild;
    }

    return merge([], container.childNodes);
};

var isTablePart = function isTablePart(html) {
    var tags = isTagName.exec(html);
    return tags && tags[1] in tagWrappers;
};

exports.parseHTML = parseHTML;
exports.isTablePart = isTablePart;