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当前路径:vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Helper/Html.php
<?php

namespace PhpOffice\PhpSpreadsheet\Helper;

use DOMDocument;
use DOMElement;
use DOMNode;
use DOMText;
use PhpOffice\PhpSpreadsheet\RichText\RichText;
use PhpOffice\PhpSpreadsheet\Style\Color;
use PhpOffice\PhpSpreadsheet\Style\Font;

class Html
{
    protected static $colourMap = [
        'aliceblue' => 'f0f8ff',
        'antiquewhite' => 'faebd7',
        'antiquewhite1' => 'ffefdb',
        'antiquewhite2' => 'eedfcc',
        'antiquewhite3' => 'cdc0b0',
        'antiquewhite4' => '8b8378',
        'aqua' => '00ffff',
        'aquamarine1' => '7fffd4',
        'aquamarine2' => '76eec6',
        'aquamarine4' => '458b74',
        'azure1' => 'f0ffff',
        'azure2' => 'e0eeee',
        'azure3' => 'c1cdcd',
        'azure4' => '838b8b',
        'beige' => 'f5f5dc',
        'bisque1' => 'ffe4c4',
        'bisque2' => 'eed5b7',
        'bisque3' => 'cdb79e',
        'bisque4' => '8b7d6b',
        'black' => '000000',
        'blanchedalmond' => 'ffebcd',
        'blue' => '0000ff',
        'blue1' => '0000ff',
        'blue2' => '0000ee',
        'blue4' => '00008b',
        'blueviolet' => '8a2be2',
        'brown' => 'a52a2a',
        'brown1' => 'ff4040',
        'brown2' => 'ee3b3b',
        'brown3' => 'cd3333',
        'brown4' => '8b2323',
        'burlywood' => 'deb887',
        'burlywood1' => 'ffd39b',
        'burlywood2' => 'eec591',
        'burlywood3' => 'cdaa7d',
        'burlywood4' => '8b7355',
        'cadetblue' => '5f9ea0',
        'cadetblue1' => '98f5ff',
        'cadetblue2' => '8ee5ee',
        'cadetblue3' => '7ac5cd',
        'cadetblue4' => '53868b',
        'chartreuse1' => '7fff00',
        'chartreuse2' => '76ee00',
        'chartreuse3' => '66cd00',
        'chartreuse4' => '458b00',
        'chocolate' => 'd2691e',
        'chocolate1' => 'ff7f24',
        'chocolate2' => 'ee7621',
        'chocolate3' => 'cd661d',
        'coral' => 'ff7f50',
        'coral1' => 'ff7256',
        'coral2' => 'ee6a50',
        'coral3' => 'cd5b45',
        'coral4' => '8b3e2f',
        'cornflowerblue' => '6495ed',
        'cornsilk1' => 'fff8dc',
        'cornsilk2' => 'eee8cd',
        'cornsilk3' => 'cdc8b1',
        'cornsilk4' => '8b8878',
        'cyan1' => '00ffff',
        'cyan2' => '00eeee',
        'cyan3' => '00cdcd',
        'cyan4' => '008b8b',
        'darkgoldenrod' => 'b8860b',
        'darkgoldenrod1' => 'ffb90f',
        'darkgoldenrod2' => 'eead0e',
        'darkgoldenrod3' => 'cd950c',
        'darkgoldenrod4' => '8b6508',
        'darkgreen' => '006400',
        'darkkhaki' => 'bdb76b',
        'darkolivegreen' => '556b2f',
        'darkolivegreen1' => 'caff70',
        'darkolivegreen2' => 'bcee68',
        'darkolivegreen3' => 'a2cd5a',
        'darkolivegreen4' => '6e8b3d',
        'darkorange' => 'ff8c00',
        'darkorange1' => 'ff7f00',
        'darkorange2' => 'ee7600',
        'darkorange3' => 'cd6600',
        'darkorange4' => '8b4500',
        'darkorchid' => '9932cc',
        'darkorchid1' => 'bf3eff',
        'darkorchid2' => 'b23aee',
        'darkorchid3' => '9a32cd',
        'darkorchid4' => '68228b',
        'darksalmon' => 'e9967a',
        'darkseagreen' => '8fbc8f',
        'darkseagreen1' => 'c1ffc1',
        'darkseagreen2' => 'b4eeb4',
        'darkseagreen3' => '9bcd9b',
        'darkseagreen4' => '698b69',
        'darkslateblue' => '483d8b',
        'darkslategray' => '2f4f4f',
        'darkslategray1' => '97ffff',
        'darkslategray2' => '8deeee',
        'darkslategray3' => '79cdcd',
        'darkslategray4' => '528b8b',
        'darkturquoise' => '00ced1',
        'darkviolet' => '9400d3',
        'deeppink1' => 'ff1493',
        'deeppink2' => 'ee1289',
        'deeppink3' => 'cd1076',
        'deeppink4' => '8b0a50',
        'deepskyblue1' => '00bfff',
        'deepskyblue2' => '00b2ee',
        'deepskyblue3' => '009acd',
        'deepskyblue4' => '00688b',
        'dimgray' => '696969',
        'dodgerblue1' => '1e90ff',
        'dodgerblue2' => '1c86ee',
        'dodgerblue3' => '1874cd',
        'dodgerblue4' => '104e8b',
        'firebrick' => 'b22222',
        'firebrick1' => 'ff3030',
        'firebrick2' => 'ee2c2c',
        'firebrick3' => 'cd2626',
        'firebrick4' => '8b1a1a',
        'floralwhite' => 'fffaf0',
        'forestgreen' => '228b22',
        'fuchsia' => 'ff00ff',
        'gainsboro' => 'dcdcdc',
        'ghostwhite' => 'f8f8ff',
        'gold1' => 'ffd700',
        'gold2' => 'eec900',
        'gold3' => 'cdad00',
        'gold4' => '8b7500',
        'goldenrod' => 'daa520',
        'goldenrod1' => 'ffc125',
        'goldenrod2' => 'eeb422',
        'goldenrod3' => 'cd9b1d',
        'goldenrod4' => '8b6914',
        'gray' => 'bebebe',
        'gray1' => '030303',
        'gray10' => '1a1a1a',
        'gray11' => '1c1c1c',
        'gray12' => '1f1f1f',
        'gray13' => '212121',
        'gray14' => '242424',
        'gray15' => '262626',
        'gray16' => '292929',
        'gray17' => '2b2b2b',
        'gray18' => '2e2e2e',
        'gray19' => '303030',
        'gray2' => '050505',
        'gray20' => '333333',
        'gray21' => '363636',
        'gray22' => '383838',
        'gray23' => '3b3b3b',
        'gray24' => '3d3d3d',
        'gray25' => '404040',
        'gray26' => '424242',
        'gray27' => '454545',
        'gray28' => '474747',
        'gray29' => '4a4a4a',
        'gray3' => '080808',
        'gray30' => '4d4d4d',
        'gray31' => '4f4f4f',
        'gray32' => '525252',
        'gray33' => '545454',
        'gray34' => '575757',
        'gray35' => '595959',
        'gray36' => '5c5c5c',
        'gray37' => '5e5e5e',
        'gray38' => '616161',
        'gray39' => '636363',
        'gray4' => '0a0a0a',
        'gray40' => '666666',
        'gray41' => '696969',
        'gray42' => '6b6b6b',
        'gray43' => '6e6e6e',
        'gray44' => '707070',
        'gray45' => '737373',
        'gray46' => '757575',
        'gray47' => '787878',
        'gray48' => '7a7a7a',
        'gray49' => '7d7d7d',
        'gray5' => '0d0d0d',
        'gray50' => '7f7f7f',
        'gray51' => '828282',
        'gray52' => '858585',
        'gray53' => '878787',
        'gray54' => '8a8a8a',
        'gray55' => '8c8c8c',
        'gray56' => '8f8f8f',
        'gray57' => '919191',
        'gray58' => '949494',
        'gray59' => '969696',
        'gray6' => '0f0f0f',
        'gray60' => '999999',
        'gray61' => '9c9c9c',
        'gray62' => '9e9e9e',
        'gray63' => 'a1a1a1',
        'gray64' => 'a3a3a3',
        'gray65' => 'a6a6a6',
        'gray66' => 'a8a8a8',
        'gray67' => 'ababab',
        'gray68' => 'adadad',
        'gray69' => 'b0b0b0',
        'gray7' => '121212',
        'gray70' => 'b3b3b3',
        'gray71' => 'b5b5b5',
        'gray72' => 'b8b8b8',
        'gray73' => 'bababa',
        'gray74' => 'bdbdbd',
        'gray75' => 'bfbfbf',
        'gray76' => 'c2c2c2',
        'gray77' => 'c4c4c4',
        'gray78' => 'c7c7c7',
        'gray79' => 'c9c9c9',
        'gray8' => '141414',
        'gray80' => 'cccccc',
        'gray81' => 'cfcfcf',
        'gray82' => 'd1d1d1',
        'gray83' => 'd4d4d4',
        'gray84' => 'd6d6d6',
        'gray85' => 'd9d9d9',
        'gray86' => 'dbdbdb',
        'gray87' => 'dedede',
        'gray88' => 'e0e0e0',
        'gray89' => 'e3e3e3',
        'gray9' => '171717',
        'gray90' => 'e5e5e5',
        'gray91' => 'e8e8e8',
        'gray92' => 'ebebeb',
        'gray93' => 'ededed',
        'gray94' => 'f0f0f0',
        'gray95' => 'f2f2f2',
        'gray97' => 'f7f7f7',
        'gray98' => 'fafafa',
        'gray99' => 'fcfcfc',
        'green' => '00ff00',
        'green1' => '00ff00',
        'green2' => '00ee00',
        'green3' => '00cd00',
        'green4' => '008b00',
        'greenyellow' => 'adff2f',
        'honeydew1' => 'f0fff0',
        'honeydew2' => 'e0eee0',
        'honeydew3' => 'c1cdc1',
        'honeydew4' => '838b83',
        'hotpink' => 'ff69b4',
        'hotpink1' => 'ff6eb4',
        'hotpink2' => 'ee6aa7',
        'hotpink3' => 'cd6090',
        'hotpink4' => '8b3a62',
        'indianred' => 'cd5c5c',
        'indianred1' => 'ff6a6a',
        'indianred2' => 'ee6363',
        'indianred3' => 'cd5555',
        'indianred4' => '8b3a3a',
        'ivory1' => 'fffff0',
        'ivory2' => 'eeeee0',
        'ivory3' => 'cdcdc1',
        'ivory4' => '8b8b83',
        'khaki' => 'f0e68c',
        'khaki1' => 'fff68f',
        'khaki2' => 'eee685',
        'khaki3' => 'cdc673',
        'khaki4' => '8b864e',
        'lavender' => 'e6e6fa',
        'lavenderblush1' => 'fff0f5',
        'lavenderblush2' => 'eee0e5',
        'lavenderblush3' => 'cdc1c5',
        'lavenderblush4' => '8b8386',
        'lawngreen' => '7cfc00',
        'lemonchiffon1' => 'fffacd',
        'lemonchiffon2' => 'eee9bf',
        'lemonchiffon3' => 'cdc9a5',
        'lemonchiffon4' => '8b8970',
        'light' => 'eedd82',
        'lightblue' => 'add8e6',
        'lightblue1' => 'bfefff',
        'lightblue2' => 'b2dfee',
        'lightblue3' => '9ac0cd',
        'lightblue4' => '68838b',
        'lightcoral' => 'f08080',
        'lightcyan1' => 'e0ffff',
        'lightcyan2' => 'd1eeee',
        'lightcyan3' => 'b4cdcd',
        'lightcyan4' => '7a8b8b',
        'lightgoldenrod1' => 'ffec8b',
        'lightgoldenrod2' => 'eedc82',
        'lightgoldenrod3' => 'cdbe70',
        'lightgoldenrod4' => '8b814c',
        'lightgoldenrodyellow' => 'fafad2',
        'lightgray' => 'd3d3d3',
        'lightpink' => 'ffb6c1',
        'lightpink1' => 'ffaeb9',
        'lightpink2' => 'eea2ad',
        'lightpink3' => 'cd8c95',
        'lightpink4' => '8b5f65',
        'lightsalmon1' => 'ffa07a',
        'lightsalmon2' => 'ee9572',
        'lightsalmon3' => 'cd8162',
        'lightsalmon4' => '8b5742',
        'lightseagreen' => '20b2aa',
        'lightskyblue' => '87cefa',
        'lightskyblue1' => 'b0e2ff',
        'lightskyblue2' => 'a4d3ee',
        'lightskyblue3' => '8db6cd',
        'lightskyblue4' => '607b8b',
        'lightslateblue' => '8470ff',
        'lightslategray' => '778899',
        'lightsteelblue' => 'b0c4de',
        'lightsteelblue1' => 'cae1ff',
        'lightsteelblue2' => 'bcd2ee',
        'lightsteelblue3' => 'a2b5cd',
        'lightsteelblue4' => '6e7b8b',
        'lightyellow1' => 'ffffe0',
        'lightyellow2' => 'eeeed1',
        'lightyellow3' => 'cdcdb4',
        'lightyellow4' => '8b8b7a',
        'lime' => '00ff00',
        'limegreen' => '32cd32',
        'linen' => 'faf0e6',
        'magenta' => 'ff00ff',
        'magenta2' => 'ee00ee',
        'magenta3' => 'cd00cd',
        'magenta4' => '8b008b',
        'maroon' => 'b03060',
        'maroon1' => 'ff34b3',
        'maroon2' => 'ee30a7',
        'maroon3' => 'cd2990',
        'maroon4' => '8b1c62',
        'medium' => '66cdaa',
        'mediumaquamarine' => '66cdaa',
        'mediumblue' => '0000cd',
        'mediumorchid' => 'ba55d3',
        'mediumorchid1' => 'e066ff',
        'mediumorchid2' => 'd15fee',
        'mediumorchid3' => 'b452cd',
        'mediumorchid4' => '7a378b',
        'mediumpurple' => '9370db',
        'mediumpurple1' => 'ab82ff',
        'mediumpurple2' => '9f79ee',
        'mediumpurple3' => '8968cd',
        'mediumpurple4' => '5d478b',
        'mediumseagreen' => '3cb371',
        'mediumslateblue' => '7b68ee',
        'mediumspringgreen' => '00fa9a',
        'mediumturquoise' => '48d1cc',
        'mediumvioletred' => 'c71585',
        'midnightblue' => '191970',
        'mintcream' => 'f5fffa',
        'mistyrose1' => 'ffe4e1',
        'mistyrose2' => 'eed5d2',
        'mistyrose3' => 'cdb7b5',
        'mistyrose4' => '8b7d7b',
        'moccasin' => 'ffe4b5',
        'navajowhite1' => 'ffdead',
        'navajowhite2' => 'eecfa1',
        'navajowhite3' => 'cdb38b',
        'navajowhite4' => '8b795e',
        'navy' => '000080',
        'navyblue' => '000080',
        'oldlace' => 'fdf5e6',
        'olive' => '808000',
        'olivedrab' => '6b8e23',
        'olivedrab1' => 'c0ff3e',
        'olivedrab2' => 'b3ee3a',
        'olivedrab4' => '698b22',
        'orange' => 'ffa500',
        'orange1' => 'ffa500',
        'orange2' => 'ee9a00',
        'orange3' => 'cd8500',
        'orange4' => '8b5a00',
        'orangered1' => 'ff4500',
        'orangered2' => 'ee4000',
        'orangered3' => 'cd3700',
        'orangered4' => '8b2500',
        'orchid' => 'da70d6',
        'orchid1' => 'ff83fa',
        'orchid2' => 'ee7ae9',
        'orchid3' => 'cd69c9',
        'orchid4' => '8b4789',
        'pale' => 'db7093',
        'palegoldenrod' => 'eee8aa',
        'palegreen' => '98fb98',
        'palegreen1' => '9aff9a',
        'palegreen2' => '90ee90',
        'palegreen3' => '7ccd7c',
        'palegreen4' => '548b54',
        'paleturquoise' => 'afeeee',
        'paleturquoise1' => 'bbffff',
        'paleturquoise2' => 'aeeeee',
        'paleturquoise3' => '96cdcd',
        'paleturquoise4' => '668b8b',
        'palevioletred' => 'db7093',
        'palevioletred1' => 'ff82ab',
        'palevioletred2' => 'ee799f',
        'palevioletred3' => 'cd6889',
        'palevioletred4' => '8b475d',
        'papayawhip' => 'ffefd5',
        'peachpuff1' => 'ffdab9',
        'peachpuff2' => 'eecbad',
        'peachpuff3' => 'cdaf95',
        'peachpuff4' => '8b7765',
        'pink' => 'ffc0cb',
        'pink1' => 'ffb5c5',
        'pink2' => 'eea9b8',
        'pink3' => 'cd919e',
        'pink4' => '8b636c',
        'plum' => 'dda0dd',
        'plum1' => 'ffbbff',
        'plum2' => 'eeaeee',
        'plum3' => 'cd96cd',
        'plum4' => '8b668b',
        'powderblue' => 'b0e0e6',
        'purple' => 'a020f0',
        'rebeccapurple' => '663399',
        'purple1' => '9b30ff',
        'purple2' => '912cee',
        'purple3' => '7d26cd',
        'purple4' => '551a8b',
        'red' => 'ff0000',
        'red1' => 'ff0000',
        'red2' => 'ee0000',
        'red3' => 'cd0000',
        'red4' => '8b0000',
        'rosybrown' => 'bc8f8f',
        'rosybrown1' => 'ffc1c1',
        'rosybrown2' => 'eeb4b4',
        'rosybrown3' => 'cd9b9b',
        'rosybrown4' => '8b6969',
        'royalblue' => '4169e1',
        'royalblue1' => '4876ff',
        'royalblue2' => '436eee',
        'royalblue3' => '3a5fcd',
        'royalblue4' => '27408b',
        'saddlebrown' => '8b4513',
        'salmon' => 'fa8072',
        'salmon1' => 'ff8c69',
        'salmon2' => 'ee8262',
        'salmon3' => 'cd7054',
        'salmon4' => '8b4c39',
        'sandybrown' => 'f4a460',
        'seagreen1' => '54ff9f',
        'seagreen2' => '4eee94',
        'seagreen3' => '43cd80',
        'seagreen4' => '2e8b57',
        'seashell1' => 'fff5ee',
        'seashell2' => 'eee5de',
        'seashell3' => 'cdc5bf',
        'seashell4' => '8b8682',
        'sienna' => 'a0522d',
        'sienna1' => 'ff8247',
        'sienna2' => 'ee7942',
        'sienna3' => 'cd6839',
        'sienna4' => '8b4726',
        'silver' => 'c0c0c0',
        'skyblue' => '87ceeb',
        'skyblue1' => '87ceff',
        'skyblue2' => '7ec0ee',
        'skyblue3' => '6ca6cd',
        'skyblue4' => '4a708b',
        'slateblue' => '6a5acd',
        'slateblue1' => '836fff',
        'slateblue2' => '7a67ee',
        'slateblue3' => '6959cd',
        'slateblue4' => '473c8b',
        'slategray' => '708090',
        'slategray1' => 'c6e2ff',
        'slategray2' => 'b9d3ee',
        'slategray3' => '9fb6cd',
        'slategray4' => '6c7b8b',
        'snow1' => 'fffafa',
        'snow2' => 'eee9e9',
        'snow3' => 'cdc9c9',
        'snow4' => '8b8989',
        'springgreen1' => '00ff7f',
        'springgreen2' => '00ee76',
        'springgreen3' => '00cd66',
        'springgreen4' => '008b45',
        'steelblue' => '4682b4',
        'steelblue1' => '63b8ff',
        'steelblue2' => '5cacee',
        'steelblue3' => '4f94cd',
        'steelblue4' => '36648b',
        'tan' => 'd2b48c',
        'tan1' => 'ffa54f',
        'tan2' => 'ee9a49',
        'tan3' => 'cd853f',
        'tan4' => '8b5a2b',
        'teal' => '008080',
        'thistle' => 'd8bfd8',
        'thistle1' => 'ffe1ff',
        'thistle2' => 'eed2ee',
        'thistle3' => 'cdb5cd',
        'thistle4' => '8b7b8b',
        'tomato1' => 'ff6347',
        'tomato2' => 'ee5c42',
        'tomato3' => 'cd4f39',
        'tomato4' => '8b3626',
        'turquoise' => '40e0d0',
        'turquoise1' => '00f5ff',
        'turquoise2' => '00e5ee',
        'turquoise3' => '00c5cd',
        'turquoise4' => '00868b',
        'violet' => 'ee82ee',
        'violetred' => 'd02090',
        'violetred1' => 'ff3e96',
        'violetred2' => 'ee3a8c',
        'violetred3' => 'cd3278',
        'violetred4' => '8b2252',
        'wheat' => 'f5deb3',
        'wheat1' => 'ffe7ba',
        'wheat2' => 'eed8ae',
        'wheat3' => 'cdba96',
        'wheat4' => '8b7e66',
        'white' => 'ffffff',
        'whitesmoke' => 'f5f5f5',
        'yellow' => 'ffff00',
        'yellow1' => 'ffff00',
        'yellow2' => 'eeee00',
        'yellow3' => 'cdcd00',
        'yellow4' => '8b8b00',
        'yellowgreen' => '9acd32',
    ];

    protected $face;

    protected $size;

    protected $color;

    protected $bold = false;

    protected $italic = false;

    protected $underline = false;

    protected $superscript = false;

    protected $subscript = false;

    protected $strikethrough = false;

    protected $startTagCallbacks = [
        'font' => 'startFontTag',
        'b' => 'startBoldTag',
        'strong' => 'startBoldTag',
        'i' => 'startItalicTag',
        'em' => 'startItalicTag',
        'u' => 'startUnderlineTag',
        'ins' => 'startUnderlineTag',
        'del' => 'startStrikethruTag',
        'sup' => 'startSuperscriptTag',
        'sub' => 'startSubscriptTag',
    ];

    protected $endTagCallbacks = [
        'font' => 'endFontTag',
        'b' => 'endBoldTag',
        'strong' => 'endBoldTag',
        'i' => 'endItalicTag',
        'em' => 'endItalicTag',
        'u' => 'endUnderlineTag',
        'ins' => 'endUnderlineTag',
        'del' => 'endStrikethruTag',
        'sup' => 'endSuperscriptTag',
        'sub' => 'endSubscriptTag',
        'br' => 'breakTag',
        'p' => 'breakTag',
        'h1' => 'breakTag',
        'h2' => 'breakTag',
        'h3' => 'breakTag',
        'h4' => 'breakTag',
        'h5' => 'breakTag',
        'h6' => 'breakTag',
    ];

    protected $stack = [];

    protected $stringData = '';

    /**
     * @var RichText
     */
    protected $richTextObject;

    protected function initialise(): void
    {
        $this->face = $this->size = $this->color = null;
        $this->bold = $this->italic = $this->underline = $this->superscript = $this->subscript = $this->strikethrough = false;

        $this->stack = [];

        $this->stringData = '';
    }

    /**
     * Parse HTML formatting and return the resulting RichText.
     *
     * @param string $html
     *
     * @return RichText
     */
    public function toRichTextObject($html)
    {
        $this->initialise();

        //    Create a new DOM object
        $dom = new DOMDocument();
        //    Load the HTML file into the DOM object
        //  Note the use of error suppression, because typically this will be an html fragment, so not fully valid markup
        $prefix = '<?xml encoding="UTF-8">';
        @$dom->loadHTML($prefix . $html, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);
        //    Discard excess white space
        $dom->preserveWhiteSpace = false;

        $this->richTextObject = new RichText();
        $this->parseElements($dom);

        // Clean any further spurious whitespace
        $this->cleanWhitespace();

        return $this->richTextObject;
    }

    protected function cleanWhitespace(): void
    {
        foreach ($this->richTextObject->getRichTextElements() as $key => $element) {
            $text = $element->getText();
            // Trim any leading spaces on the first run
            if ($key == 0) {
                $text = ltrim($text);
            }
            // Trim any spaces immediately after a line break
            $text = preg_replace('/\n */mu', "\n", $text);
            $element->setText($text);
        }
    }

    protected function buildTextRun(): void
    {
        $text = $this->stringData;
        if (trim($text) === '') {
            return;
        }

        $richtextRun = $this->richTextObject->createTextRun($this->stringData);
        if ($this->face) {
            $richtextRun->getFont()->setName($this->face);
        }
        if ($this->size) {
            $richtextRun->getFont()->setSize($this->size);
        }
        if ($this->color) {
            $richtextRun->getFont()->setColor(new Color('ff' . $this->color));
        }
        if ($this->bold) {
            $richtextRun->getFont()->setBold(true);
        }
        if ($this->italic) {
            $richtextRun->getFont()->setItalic(true);
        }
        if ($this->underline) {
            $richtextRun->getFont()->setUnderline(Font::UNDERLINE_SINGLE);
        }
        if ($this->superscript) {
            $richtextRun->getFont()->setSuperscript(true);
        }
        if ($this->subscript) {
            $richtextRun->getFont()->setSubscript(true);
        }
        if ($this->strikethrough) {
            $richtextRun->getFont()->setStrikethrough(true);
        }
        $this->stringData = '';
    }

    protected function rgbToColour($rgb)
    {
        preg_match_all('/\d+/', $rgb, $values);
        foreach ($values[0] as &$value) {
            $value = str_pad(dechex($value), 2, '0', STR_PAD_LEFT);
        }

        return implode('', $values[0]);
    }

    protected function colourNameLookup($rgb)
    {
        return self::$colourMap[$rgb];
    }

    protected function startFontTag($tag): void
    {
        foreach ($tag->attributes as $attribute) {
            $attributeName = strtolower($attribute->name);
            $attributeValue = $attribute->value;

            if ($attributeName == 'color') {
                if (preg_match('/rgb\s*\(/', $attributeValue)) {
                    $this->$attributeName = $this->rgbToColour($attributeValue);
                } elseif (strpos(trim($attributeValue), '#') === 0) {
                    $this->$attributeName = ltrim($attributeValue, '#');
                } else {
                    $this->$attributeName = $this->colourNameLookup($attributeValue);
                }
            } else {
                $this->$attributeName = $attributeValue;
            }
        }
    }

    protected function endFontTag(): void
    {
        $this->face = $this->size = $this->color = null;
    }

    protected function startBoldTag(): void
    {
        $this->bold = true;
    }

    protected function endBoldTag(): void
    {
        $this->bold = false;
    }

    protected function startItalicTag(): void
    {
        $this->italic = true;
    }

    protected function endItalicTag(): void
    {
        $this->italic = false;
    }

    protected function startUnderlineTag(): void
    {
        $this->underline = true;
    }

    protected function endUnderlineTag(): void
    {
        $this->underline = false;
    }

    protected function startSubscriptTag(): void
    {
        $this->subscript = true;
    }

    protected function endSubscriptTag(): void
    {
        $this->subscript = false;
    }

    protected function startSuperscriptTag(): void
    {
        $this->superscript = true;
    }

    protected function endSuperscriptTag(): void
    {
        $this->superscript = false;
    }

    protected function startStrikethruTag(): void
    {
        $this->strikethrough = true;
    }

    protected function endStrikethruTag(): void
    {
        $this->strikethrough = false;
    }

    protected function breakTag(): void
    {
        $this->stringData .= "\n";
    }

    protected function parseTextNode(DOMText $textNode): void
    {
        $domText = preg_replace(
            '/\s+/u',
            ' ',
            str_replace(["\r", "\n"], ' ', $textNode->nodeValue)
        );
        $this->stringData .= $domText;
        $this->buildTextRun();
    }

    /**
     * @param string $callbackTag
     */
    protected function handleCallback(DOMElement $element, $callbackTag, array $callbacks): void
    {
        if (isset($callbacks[$callbackTag])) {
            $elementHandler = $callbacks[$callbackTag];
            if (method_exists($this, $elementHandler)) {
                call_user_func([$this, $elementHandler], $element);
            }
        }
    }

    protected function parseElementNode(DOMElement $element): void
    {
        $callbackTag = strtolower($element->nodeName);
        $this->stack[] = $callbackTag;

        $this->handleCallback($element, $callbackTag, $this->startTagCallbacks);

        $this->parseElements($element);
        array_pop($this->stack);

        $this->handleCallback($element, $callbackTag, $this->endTagCallbacks);
    }

    protected function parseElements(DOMNode $element): void
    {
        foreach ($element->childNodes as $child) {
            if ($child instanceof DOMText) {
                $this->parseTextNode($child);
            } elseif ($child instanceof DOMElement) {
                $this->parseElementNode($child);
            }
        }
    }
}
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