vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Helper/Html.php

   1 <?php
   2
   3 namespace PhpOffice\PhpSpreadsheet\Helper;
   4
   5 use DOMDocument;
   6 use DOMElement;
   7 use DOMNode;
   8 use DOMText;
   9 use PhpOffice\PhpSpreadsheet\RichText\RichText;
  10 use PhpOffice\PhpSpreadsheet\Style\Color;
  11 use PhpOffice\PhpSpreadsheet\Style\Font;
  12
  13 class Html
  14 {
  15     protected static $colourMap = [
  16         'aliceblue' => 'f0f8ff',
  17         'antiquewhite' => 'faebd7',
  18         'antiquewhite1' => 'ffefdb',
  19         'antiquewhite2' => 'eedfcc',
  20         'antiquewhite3' => 'cdc0b0',
  21         'antiquewhite4' => '8b8378',
  22         'aqua' => '00ffff',
  23         'aquamarine1' => '7fffd4',
  24         'aquamarine2' => '76eec6',
  25         'aquamarine4' => '458b74',
  26         'azure1' => 'f0ffff',
  27         'azure2' => 'e0eeee',
  28         'azure3' => 'c1cdcd',
  29         'azure4' => '838b8b',
  30         'beige' => 'f5f5dc',
  31         'bisque1' => 'ffe4c4',
  32         'bisque2' => 'eed5b7',
  33         'bisque3' => 'cdb79e',
  34         'bisque4' => '8b7d6b',
  35         'black' => '000000',
  36         'blanchedalmond' => 'ffebcd',
  37         'blue' => '0000ff',
  38         'blue1' => '0000ff',
  39         'blue2' => '0000ee',
  40         'blue4' => '00008b',
  41         'blueviolet' => '8a2be2',
  42         'brown' => 'a52a2a',
  43         'brown1' => 'ff4040',
  44         'brown2' => 'ee3b3b',
  45         'brown3' => 'cd3333',
  46         'brown4' => '8b2323',
  47         'burlywood' => 'deb887',
  48         'burlywood1' => 'ffd39b',
  49         'burlywood2' => 'eec591',
  50         'burlywood3' => 'cdaa7d',
  51         'burlywood4' => '8b7355',
  52         'cadetblue' => '5f9ea0',
  53         'cadetblue1' => '98f5ff',
  54         'cadetblue2' => '8ee5ee',
  55         'cadetblue3' => '7ac5cd',
  56         'cadetblue4' => '53868b',
  57         'chartreuse1' => '7fff00',
  58         'chartreuse2' => '76ee00',
  59         'chartreuse3' => '66cd00',
  60         'chartreuse4' => '458b00',
  61         'chocolate' => 'd2691e',
  62         'chocolate1' => 'ff7f24',
  63         'chocolate2' => 'ee7621',
  64         'chocolate3' => 'cd661d',
  65         'coral' => 'ff7f50',
  66         'coral1' => 'ff7256',
  67         'coral2' => 'ee6a50',
  68         'coral3' => 'cd5b45',
  69         'coral4' => '8b3e2f',
  70         'cornflowerblue' => '6495ed',
  71         'cornsilk1' => 'fff8dc',
  72         'cornsilk2' => 'eee8cd',
  73         'cornsilk3' => 'cdc8b1',
  74         'cornsilk4' => '8b8878',
  75         'cyan1' => '00ffff',
  76         'cyan2' => '00eeee',
  77         'cyan3' => '00cdcd',
  78         'cyan4' => '008b8b',
  79         'darkgoldenrod' => 'b8860b',
  80         'darkgoldenrod1' => 'ffb90f',
  81         'darkgoldenrod2' => 'eead0e',
  82         'darkgoldenrod3' => 'cd950c',
  83         'darkgoldenrod4' => '8b6508',
  84         'darkgreen' => '006400',
  85         'darkkhaki' => 'bdb76b',
  86         'darkolivegreen' => '556b2f',
  87         'darkolivegreen1' => 'caff70',
  88         'darkolivegreen2' => 'bcee68',
  89         'darkolivegreen3' => 'a2cd5a',
  90         'darkolivegreen4' => '6e8b3d',
  91         'darkorange' => 'ff8c00',
  92         'darkorange1' => 'ff7f00',
  93         'darkorange2' => 'ee7600',
  94         'darkorange3' => 'cd6600',
  95         'darkorange4' => '8b4500',
  96         'darkorchid' => '9932cc',
  97         'darkorchid1' => 'bf3eff',
  98         'darkorchid2' => 'b23aee',
  99         'darkorchid3' => '9a32cd',
 100         'darkorchid4' => '68228b',
 101         'darksalmon' => 'e9967a',
 102         'darkseagreen' => '8fbc8f',
 103         'darkseagreen1' => 'c1ffc1',
 104         'darkseagreen2' => 'b4eeb4',
 105         'darkseagreen3' => '9bcd9b',
 106         'darkseagreen4' => '698b69',
 107         'darkslateblue' => '483d8b',
 108         'darkslategray' => '2f4f4f',
 109         'darkslategray1' => '97ffff',
 110         'darkslategray2' => '8deeee',
 111         'darkslategray3' => '79cdcd',
 112         'darkslategray4' => '528b8b',
 113         'darkturquoise' => '00ced1',
 114         'darkviolet' => '9400d3',
 115         'deeppink1' => 'ff1493',
 116         'deeppink2' => 'ee1289',
 117         'deeppink3' => 'cd1076',
 118         'deeppink4' => '8b0a50',
 119         'deepskyblue1' => '00bfff',
 120         'deepskyblue2' => '00b2ee',
 121         'deepskyblue3' => '009acd',
 122         'deepskyblue4' => '00688b',
 123         'dimgray' => '696969',
 124         'dodgerblue1' => '1e90ff',
 125         'dodgerblue2' => '1c86ee',
 126         'dodgerblue3' => '1874cd',
 127         'dodgerblue4' => '104e8b',
 128         'firebrick' => 'b22222',
 129         'firebrick1' => 'ff3030',
 130         'firebrick2' => 'ee2c2c',
 131         'firebrick3' => 'cd2626',
 132         'firebrick4' => '8b1a1a',
 133         'floralwhite' => 'fffaf0',
 134         'forestgreen' => '228b22',
 135         'fuchsia' => 'ff00ff',
 136         'gainsboro' => 'dcdcdc',
 137         'ghostwhite' => 'f8f8ff',
 138         'gold1' => 'ffd700',
 139         'gold2' => 'eec900',
 140         'gold3' => 'cdad00',
 141         'gold4' => '8b7500',
 142         'goldenrod' => 'daa520',
 143         'goldenrod1' => 'ffc125',
 144         'goldenrod2' => 'eeb422',
 145         'goldenrod3' => 'cd9b1d',
 146         'goldenrod4' => '8b6914',
 147         'gray' => 'bebebe',
 148         'gray1' => '030303',
 149         'gray10' => '1a1a1a',
 150         'gray11' => '1c1c1c',
 151         'gray12' => '1f1f1f',
 152         'gray13' => '212121',
 153         'gray14' => '242424',
 154         'gray15' => '262626',
 155         'gray16' => '292929',
 156         'gray17' => '2b2b2b',
 157         'gray18' => '2e2e2e',
 158         'gray19' => '303030',
 159         'gray2' => '050505',
 160         'gray20' => '333333',
 161         'gray21' => '363636',
 162         'gray22' => '383838',
 163         'gray23' => '3b3b3b',
 164         'gray24' => '3d3d3d',
 165         'gray25' => '404040',
 166         'gray26' => '424242',
 167         'gray27' => '454545',
 168         'gray28' => '474747',
 169         'gray29' => '4a4a4a',
 170         'gray3' => '080808',
 171         'gray30' => '4d4d4d',
 172         'gray31' => '4f4f4f',
 173         'gray32' => '525252',
 174         'gray33' => '545454',
 175         'gray34' => '575757',
 176         'gray35' => '595959',
 177         'gray36' => '5c5c5c',
 178         'gray37' => '5e5e5e',
 179         'gray38' => '616161',
 180         'gray39' => '636363',
 181         'gray4' => '0a0a0a',
 182         'gray40' => '666666',
 183         'gray41' => '696969',
 184         'gray42' => '6b6b6b',
 185         'gray43' => '6e6e6e',
 186         'gray44' => '707070',
 187         'gray45' => '737373',
 188         'gray46' => '757575',
 189         'gray47' => '787878',
 190         'gray48' => '7a7a7a',
 191         'gray49' => '7d7d7d',
 192         'gray5' => '0d0d0d',
 193         'gray50' => '7f7f7f',
 194         'gray51' => '828282',
 195         'gray52' => '858585',
 196         'gray53' => '878787',
 197         'gray54' => '8a8a8a',
 198         'gray55' => '8c8c8c',
 199         'gray56' => '8f8f8f',
 200         'gray57' => '919191',
 201         'gray58' => '949494',
 202         'gray59' => '969696',
 203         'gray6' => '0f0f0f',
 204         'gray60' => '999999',
 205         'gray61' => '9c9c9c',
 206         'gray62' => '9e9e9e',
 207         'gray63' => 'a1a1a1',
 208         'gray64' => 'a3a3a3',
 209         'gray65' => 'a6a6a6',
 210         'gray66' => 'a8a8a8',
 211         'gray67' => 'ababab',
 212         'gray68' => 'adadad',
 213         'gray69' => 'b0b0b0',
 214         'gray7' => '121212',
 215         'gray70' => 'b3b3b3',
 216         'gray71' => 'b5b5b5',
 217         'gray72' => 'b8b8b8',
 218         'gray73' => 'bababa',
 219         'gray74' => 'bdbdbd',
 220         'gray75' => 'bfbfbf',
 221         'gray76' => 'c2c2c2',
 222         'gray77' => 'c4c4c4',
 223         'gray78' => 'c7c7c7',
 224         'gray79' => 'c9c9c9',
 225         'gray8' => '141414',
 226         'gray80' => 'cccccc',
 227         'gray81' => 'cfcfcf',
 228         'gray82' => 'd1d1d1',
 229         'gray83' => 'd4d4d4',
 230         'gray84' => 'd6d6d6',
 231         'gray85' => 'd9d9d9',
 232         'gray86' => 'dbdbdb',
 233         'gray87' => 'dedede',
 234         'gray88' => 'e0e0e0',
 235         'gray89' => 'e3e3e3',
 236         'gray9' => '171717',
 237         'gray90' => 'e5e5e5',
 238         'gray91' => 'e8e8e8',
 239         'gray92' => 'ebebeb',
 240         'gray93' => 'ededed',
 241         'gray94' => 'f0f0f0',
 242         'gray95' => 'f2f2f2',
 243         'gray97' => 'f7f7f7',
 244         'gray98' => 'fafafa',
 245         'gray99' => 'fcfcfc',
 246         'green' => '00ff00',
 247         'green1' => '00ff00',
 248         'green2' => '00ee00',
 249         'green3' => '00cd00',
 250         'green4' => '008b00',
 251         'greenyellow' => 'adff2f',
 252         'honeydew1' => 'f0fff0',
 253         'honeydew2' => 'e0eee0',
 254         'honeydew3' => 'c1cdc1',
 255         'honeydew4' => '838b83',
 256         'hotpink' => 'ff69b4',
 257         'hotpink1' => 'ff6eb4',
 258         'hotpink2' => 'ee6aa7',
 259         'hotpink3' => 'cd6090',
 260         'hotpink4' => '8b3a62',
 261         'indianred' => 'cd5c5c',
 262         'indianred1' => 'ff6a6a',
 263         'indianred2' => 'ee6363',
 264         'indianred3' => 'cd5555',
 265         'indianred4' => '8b3a3a',
 266         'ivory1' => 'fffff0',
 267         'ivory2' => 'eeeee0',
 268         'ivory3' => 'cdcdc1',
 269         'ivory4' => '8b8b83',
 270         'khaki' => 'f0e68c',
 271         'khaki1' => 'fff68f',
 272         'khaki2' => 'eee685',
 273         'khaki3' => 'cdc673',
 274         'khaki4' => '8b864e',
 275         'lavender' => 'e6e6fa',
 276         'lavenderblush1' => 'fff0f5',
 277         'lavenderblush2' => 'eee0e5',
 278         'lavenderblush3' => 'cdc1c5',
 279         'lavenderblush4' => '8b8386',
 280         'lawngreen' => '7cfc00',
 281         'lemonchiffon1' => 'fffacd',
 282         'lemonchiffon2' => 'eee9bf',
 283         'lemonchiffon3' => 'cdc9a5',
 284         'lemonchiffon4' => '8b8970',
 285         'light' => 'eedd82',
 286         'lightblue' => 'add8e6',
 287         'lightblue1' => 'bfefff',
 288         'lightblue2' => 'b2dfee',
 289         'lightblue3' => '9ac0cd',
 290         'lightblue4' => '68838b',
 291         'lightcoral' => 'f08080',
 292         'lightcyan1' => 'e0ffff',
 293         'lightcyan2' => 'd1eeee',
 294         'lightcyan3' => 'b4cdcd',
 295         'lightcyan4' => '7a8b8b',
 296         'lightgoldenrod1' => 'ffec8b',
 297         'lightgoldenrod2' => 'eedc82',
 298         'lightgoldenrod3' => 'cdbe70',
 299         'lightgoldenrod4' => '8b814c',
 300         'lightgoldenrodyellow' => 'fafad2',
 301         'lightgray' => 'd3d3d3',
 302         'lightpink' => 'ffb6c1',
 303         'lightpink1' => 'ffaeb9',
 304         'lightpink2' => 'eea2ad',
 305         'lightpink3' => 'cd8c95',
 306         'lightpink4' => '8b5f65',
 307         'lightsalmon1' => 'ffa07a',
 308         'lightsalmon2' => 'ee9572',
 309         'lightsalmon3' => 'cd8162',
 310         'lightsalmon4' => '8b5742',
 311         'lightseagreen' => '20b2aa',
 312         'lightskyblue' => '87cefa',
 313         'lightskyblue1' => 'b0e2ff',
 314         'lightskyblue2' => 'a4d3ee',
 315         'lightskyblue3' => '8db6cd',
 316         'lightskyblue4' => '607b8b',
 317         'lightslateblue' => '8470ff',
 318         'lightslategray' => '778899',
 319         'lightsteelblue' => 'b0c4de',
 320         'lightsteelblue1' => 'cae1ff',
 321         'lightsteelblue2' => 'bcd2ee',
 322         'lightsteelblue3' => 'a2b5cd',
 323         'lightsteelblue4' => '6e7b8b',
 324         'lightyellow1' => 'ffffe0',
 325         'lightyellow2' => 'eeeed1',
 326         'lightyellow3' => 'cdcdb4',
 327         'lightyellow4' => '8b8b7a',
 328         'lime' => '00ff00',
 329         'limegreen' => '32cd32',
 330         'linen' => 'faf0e6',
 331         'magenta' => 'ff00ff',
 332         'magenta2' => 'ee00ee',
 333         'magenta3' => 'cd00cd',
 334         'magenta4' => '8b008b',
 335         'maroon' => 'b03060',
 336         'maroon1' => 'ff34b3',
 337         'maroon2' => 'ee30a7',
 338         'maroon3' => 'cd2990',
 339         'maroon4' => '8b1c62',
 340         'medium' => '66cdaa',
 341         'mediumaquamarine' => '66cdaa',
 342         'mediumblue' => '0000cd',
 343         'mediumorchid' => 'ba55d3',
 344         'mediumorchid1' => 'e066ff',
 345         'mediumorchid2' => 'd15fee',
 346         'mediumorchid3' => 'b452cd',
 347         'mediumorchid4' => '7a378b',
 348         'mediumpurple' => '9370db',
 349         'mediumpurple1' => 'ab82ff',
 350         'mediumpurple2' => '9f79ee',
 351         'mediumpurple3' => '8968cd',
 352         'mediumpurple4' => '5d478b',
 353         'mediumseagreen' => '3cb371',
 354         'mediumslateblue' => '7b68ee',
 355         'mediumspringgreen' => '00fa9a',
 356         'mediumturquoise' => '48d1cc',
 357         'mediumvioletred' => 'c71585',
 358         'midnightblue' => '191970',
 359         'mintcream' => 'f5fffa',
 360         'mistyrose1' => 'ffe4e1',
 361         'mistyrose2' => 'eed5d2',
 362         'mistyrose3' => 'cdb7b5',
 363         'mistyrose4' => '8b7d7b',
 364         'moccasin' => 'ffe4b5',
 365         'navajowhite1' => 'ffdead',
 366         'navajowhite2' => 'eecfa1',
 367         'navajowhite3' => 'cdb38b',
 368         'navajowhite4' => '8b795e',
 369         'navy' => '000080',
 370         'navyblue' => '000080',
 371         'oldlace' => 'fdf5e6',
 372         'olive' => '808000',
 373         'olivedrab' => '6b8e23',
 374         'olivedrab1' => 'c0ff3e',
 375         'olivedrab2' => 'b3ee3a',
 376         'olivedrab4' => '698b22',
 377         'orange' => 'ffa500',
 378         'orange1' => 'ffa500',
 379         'orange2' => 'ee9a00',
 380         'orange3' => 'cd8500',
 381         'orange4' => '8b5a00',
 382         'orangered1' => 'ff4500',
 383         'orangered2' => 'ee4000',
 384         'orangered3' => 'cd3700',
 385         'orangered4' => '8b2500',
 386         'orchid' => 'da70d6',
 387         'orchid1' => 'ff83fa',
 388         'orchid2' => 'ee7ae9',
 389         'orchid3' => 'cd69c9',
 390         'orchid4' => '8b4789',
 391         'pale' => 'db7093',
 392         'palegoldenrod' => 'eee8aa',
 393         'palegreen' => '98fb98',
 394         'palegreen1' => '9aff9a',
 395         'palegreen2' => '90ee90',
 396         'palegreen3' => '7ccd7c',
 397         'palegreen4' => '548b54',
 398         'paleturquoise' => 'afeeee',
 399         'paleturquoise1' => 'bbffff',
 400         'paleturquoise2' => 'aeeeee',
 401         'paleturquoise3' => '96cdcd',
 402         'paleturquoise4' => '668b8b',
 403         'palevioletred' => 'db7093',
 404         'palevioletred1' => 'ff82ab',
 405         'palevioletred2' => 'ee799f',
 406         'palevioletred3' => 'cd6889',
 407         'palevioletred4' => '8b475d',
 408         'papayawhip' => 'ffefd5',
 409         'peachpuff1' => 'ffdab9',
 410         'peachpuff2' => 'eecbad',
 411         'peachpuff3' => 'cdaf95',
 412         'peachpuff4' => '8b7765',
 413         'pink' => 'ffc0cb',
 414         'pink1' => 'ffb5c5',
 415         'pink2' => 'eea9b8',
 416         'pink3' => 'cd919e',
 417         'pink4' => '8b636c',
 418         'plum' => 'dda0dd',
 419         'plum1' => 'ffbbff',
 420         'plum2' => 'eeaeee',
 421         'plum3' => 'cd96cd',
 422         'plum4' => '8b668b',
 423         'powderblue' => 'b0e0e6',
 424         'purple' => 'a020f0',
 425         'rebeccapurple' => '663399',
 426         'purple1' => '9b30ff',
 427         'purple2' => '912cee',
 428         'purple3' => '7d26cd',
 429         'purple4' => '551a8b',
 430         'red' => 'ff0000',
 431         'red1' => 'ff0000',
 432         'red2' => 'ee0000',
 433         'red3' => 'cd0000',
 434         'red4' => '8b0000',
 435         'rosybrown' => 'bc8f8f',
 436         'rosybrown1' => 'ffc1c1',
 437         'rosybrown2' => 'eeb4b4',
 438         'rosybrown3' => 'cd9b9b',
 439         'rosybrown4' => '8b6969',
 440         'royalblue' => '4169e1',
 441         'royalblue1' => '4876ff',
 442         'royalblue2' => '436eee',
 443         'royalblue3' => '3a5fcd',
 444         'royalblue4' => '27408b',
 445         'saddlebrown' => '8b4513',
 446         'salmon' => 'fa8072',
 447         'salmon1' => 'ff8c69',
 448         'salmon2' => 'ee8262',
 449         'salmon3' => 'cd7054',
 450         'salmon4' => '8b4c39',
 451         'sandybrown' => 'f4a460',
 452         'seagreen1' => '54ff9f',
 453         'seagreen2' => '4eee94',
 454         'seagreen3' => '43cd80',
 455         'seagreen4' => '2e8b57',
 456         'seashell1' => 'fff5ee',
 457         'seashell2' => 'eee5de',
 458         'seashell3' => 'cdc5bf',
 459         'seashell4' => '8b8682',
 460         'sienna' => 'a0522d',
 461         'sienna1' => 'ff8247',
 462         'sienna2' => 'ee7942',
 463         'sienna3' => 'cd6839',
 464         'sienna4' => '8b4726',
 465         'silver' => 'c0c0c0',
 466         'skyblue' => '87ceeb',
 467         'skyblue1' => '87ceff',
 468         'skyblue2' => '7ec0ee',
 469         'skyblue3' => '6ca6cd',
 470         'skyblue4' => '4a708b',
 471         'slateblue' => '6a5acd',
 472         'slateblue1' => '836fff',
 473         'slateblue2' => '7a67ee',
 474         'slateblue3' => '6959cd',
 475         'slateblue4' => '473c8b',
 476         'slategray' => '708090',
 477         'slategray1' => 'c6e2ff',
 478         'slategray2' => 'b9d3ee',
 479         'slategray3' => '9fb6cd',
 480         'slategray4' => '6c7b8b',
 481         'snow1' => 'fffafa',
 482         'snow2' => 'eee9e9',
 483         'snow3' => 'cdc9c9',
 484         'snow4' => '8b8989',
 485         'springgreen1' => '00ff7f',
 486         'springgreen2' => '00ee76',
 487         'springgreen3' => '00cd66',
 488         'springgreen4' => '008b45',
 489         'steelblue' => '4682b4',
 490         'steelblue1' => '63b8ff',
 491         'steelblue2' => '5cacee',
 492         'steelblue3' => '4f94cd',
 493         'steelblue4' => '36648b',
 494         'tan' => 'd2b48c',
 495         'tan1' => 'ffa54f',
 496         'tan2' => 'ee9a49',
 497         'tan3' => 'cd853f',
 498         'tan4' => '8b5a2b',
 499         'teal' => '008080',
 500         'thistle' => 'd8bfd8',
 501         'thistle1' => 'ffe1ff',
 502         'thistle2' => 'eed2ee',
 503         'thistle3' => 'cdb5cd',
 504         'thistle4' => '8b7b8b',
 505         'tomato1' => 'ff6347',
 506         'tomato2' => 'ee5c42',
 507         'tomato3' => 'cd4f39',
 508         'tomato4' => '8b3626',
 509         'turquoise' => '40e0d0',
 510         'turquoise1' => '00f5ff',
 511         'turquoise2' => '00e5ee',
 512         'turquoise3' => '00c5cd',
 513         'turquoise4' => '00868b',
 514         'violet' => 'ee82ee',
 515         'violetred' => 'd02090',
 516         'violetred1' => 'ff3e96',
 517         'violetred2' => 'ee3a8c',
 518         'violetred3' => 'cd3278',
 519         'violetred4' => '8b2252',
 520         'wheat' => 'f5deb3',
 521         'wheat1' => 'ffe7ba',
 522         'wheat2' => 'eed8ae',
 523         'wheat3' => 'cdba96',
 524         'wheat4' => '8b7e66',
 525         'white' => 'ffffff',
 526         'whitesmoke' => 'f5f5f5',
 527         'yellow' => 'ffff00',
 528         'yellow1' => 'ffff00',
 529         'yellow2' => 'eeee00',
 530         'yellow3' => 'cdcd00',
 531         'yellow4' => '8b8b00',
 532         'yellowgreen' => '9acd32',
 533     ];
 534
 535     protected $face;
 536
 537     protected $size;
 538
 539     protected $color;
 540
 541     protected $bold = false;
 542
 543     protected $italic = false;
 544
 545     protected $underline = false;
 546
 547     protected $superscript = false;
 548
 549     protected $subscript = false;
 550
 551     protected $strikethrough = false;
 552
 553     protected $startTagCallbacks = [
 554         'font' => 'startFontTag',
 555         'b' => 'startBoldTag',
 556         'strong' => 'startBoldTag',
 557         'i' => 'startItalicTag',
 558         'em' => 'startItalicTag',
 559         'u' => 'startUnderlineTag',
 560         'ins' => 'startUnderlineTag',
 561         'del' => 'startStrikethruTag',
 562         'sup' => 'startSuperscriptTag',
 563         'sub' => 'startSubscriptTag',
 564     ];
 565
 566     protected $endTagCallbacks = [
 567         'font' => 'endFontTag',
 568         'b' => 'endBoldTag',
 569         'strong' => 'endBoldTag',
 570         'i' => 'endItalicTag',
 571         'em' => 'endItalicTag',
 572         'u' => 'endUnderlineTag',
 573         'ins' => 'endUnderlineTag',
 574         'del' => 'endStrikethruTag',
 575         'sup' => 'endSuperscriptTag',
 576         'sub' => 'endSubscriptTag',
 577         'br' => 'breakTag',
 578         'p' => 'breakTag',
 579         'h1' => 'breakTag',
 580         'h2' => 'breakTag',
 581         'h3' => 'breakTag',
 582         'h4' => 'breakTag',
 583         'h5' => 'breakTag',
 584         'h6' => 'breakTag',
 585     ];
 586
 587     protected $stack = [];
 588
 589     protected $stringData = '';
 590
 591     /**
 592      * @var RichText
 593      */
 594     protected $richTextObject;
 595
 596     protected function initialise()
 597     {
 598         $this->face = $this->size = $this->color = null;
 599         $this->bold = $this->italic = $this->underline = $this->superscript = $this->subscript = $this->strikethrough = false;
 600
 601         $this->stack = [];
 602
 603         $this->stringData = '';
 604     }
 605
 606     /**
 607      * Parse HTML formatting and return the resulting RichText.
 608      *
 609      * @param string $html
 610      *
 611      * @return RichText
 612      */
 613     public function toRichTextObject($html)
 614     {
 615         $this->initialise();
 616
 617         //    Create a new DOM object
 618         $dom = new DOMDocument();
 619         //    Load the HTML file into the DOM object
 620         //  Note the use of error suppression, because typically this will be an html fragment, so not fully valid markup
 621         $prefix = '<?xml encoding="UTF-8">';
 622         @$dom->loadHTML($prefix . $html, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);
 623         //    Discard excess white space
 624         $dom->preserveWhiteSpace = false;
 625
 626         $this->richTextObject = new RichText();
 627         $this->parseElements($dom);
 628
 629         // Clean any further spurious whitespace
 630         $this->cleanWhitespace();
 631
 632         return $this->richTextObject;
 633     }
 634
 635     protected function cleanWhitespace()
 636     {
 637         foreach ($this->richTextObject->getRichTextElements() as $key => $element) {
 638             $text = $element->getText();
 639             // Trim any leading spaces on the first run
 640             if ($key == 0) {
 641                 $text = ltrim($text);
 642             }
 643             // Trim any spaces immediately after a line break
 644             $text = preg_replace('/\n */mu', "\n", $text);
 645             $element->setText($text);
 646         }
 647     }
 648
 649     protected function buildTextRun()
 650     {
 651         $text = $this->stringData;
 652         if (trim($text) === '') {
 653             return;
 654         }
 655
 656         $richtextRun = $this->richTextObject->createTextRun($this->stringData);
 657         if ($this->face) {
 658             $richtextRun->getFont()->setName($this->face);
 659         }
 660         if ($this->size) {
 661             $richtextRun->getFont()->setSize($this->size);
 662         }
 663         if ($this->color) {
 664             $richtextRun->getFont()->setColor(new Color('ff' . $this->color));
 665         }
 666         if ($this->bold) {
 667             $richtextRun->getFont()->setBold(true);
 668         }
 669         if ($this->italic) {
 670             $richtextRun->getFont()->setItalic(true);
 671         }
 672         if ($this->underline) {
 673             $richtextRun->getFont()->setUnderline(Font::UNDERLINE_SINGLE);
 674         }
 675         if ($this->superscript) {
 676             $richtextRun->getFont()->setSuperscript(true);
 677         }
 678         if ($this->subscript) {
 679             $richtextRun->getFont()->setSubscript(true);
 680         }
 681         if ($this->strikethrough) {
 682             $richtextRun->getFont()->setStrikethrough(true);
 683         }
 684         $this->stringData = '';
 685     }
 686
 687     protected function rgbToColour($rgb)
 688     {
 689         preg_match_all('/\d+/', $rgb, $values);
 690         foreach ($values[0] as &$value) {
 691             $value = str_pad(dechex($value), 2, '0', STR_PAD_LEFT);
 692         }
 693
 694         return implode($values[0]);
 695     }
 696
 697     protected function colourNameLookup($rgb)
 698     {
 699         return self::$colourMap[$rgb];
 700     }
 701
 702     protected function startFontTag($tag)
 703     {
 704         foreach ($tag->attributes as $attribute) {
 705             $attributeName = strtolower($attribute->name);
 706             $attributeValue = $attribute->value;
 707
 708             if ($attributeName == 'color') {
 709                 if (preg_match('/rgb\s*\(/', $attributeValue)) {
 710                     $this->$attributeName = $this->rgbToColour($attributeValue);
 711                 } elseif (strpos(trim($attributeValue), '#') === 0) {
 712                     $this->$attributeName = ltrim($attributeValue, '#');
 713                 } else {
 714                     $this->$attributeName = $this->colourNameLookup($attributeValue);
 715                 }
 716             } else {
 717                 $this->$attributeName = $attributeValue;
 718             }
 719         }
 720     }
 721
 722     protected function endFontTag()
 723     {
 724         $this->face = $this->size = $this->color = null;
 725     }
 726
 727     protected function startBoldTag()
 728     {
 729         $this->bold = true;
 730     }
 731
 732     protected function endBoldTag()
 733     {
 734         $this->bold = false;
 735     }
 736
 737     protected function startItalicTag()
 738     {
 739         $this->italic = true;
 740     }
 741
 742     protected function endItalicTag()
 743     {
 744         $this->italic = false;
 745     }
 746
 747     protected function startUnderlineTag()
 748     {
 749         $this->underline = true;
 750     }
 751
 752     protected function endUnderlineTag()
 753     {
 754         $this->underline = false;
 755     }
 756
 757     protected function startSubscriptTag()
 758     {
 759         $this->subscript = true;
 760     }
 761
 762     protected function endSubscriptTag()
 763     {
 764         $this->subscript = false;
 765     }
 766
 767     protected function startSuperscriptTag()
 768     {
 769         $this->superscript = true;
 770     }
 771
 772     protected function endSuperscriptTag()
 773     {
 774         $this->superscript = false;
 775     }
 776
 777     protected function startStrikethruTag()
 778     {
 779         $this->strikethrough = true;
 780     }
 781
 782     protected function endStrikethruTag()
 783     {
 784         $this->strikethrough = false;
 785     }
 786
 787     protected function breakTag()
 788     {
 789         $this->stringData .= "\n";
 790     }
 791
 792     protected function parseTextNode(DOMText $textNode)
 793     {
 794         $domText = preg_replace(
 795             '/\s+/u',
 796             ' ',
 797             str_replace(["\r", "\n"], ' ', $textNode->nodeValue)
 798         );
 799         $this->stringData .= $domText;
 800         $this->buildTextRun();
 801     }
 802
 803     /**
 804      * @param DOMElement $element
 805      * @param string $callbackTag
 806      * @param array $callbacks
 807      */
 808     protected function handleCallback(DOMElement $element, $callbackTag, array $callbacks)
 809     {
 810         if (isset($callbacks[$callbackTag])) {
 811             $elementHandler = $callbacks[$callbackTag];
 812             if (method_exists($this, $elementHandler)) {
 813                 call_user_func([$this, $elementHandler], $element);
 814             }
 815         }
 816     }
 817
 818     protected function parseElementNode(DOMElement $element)
 819     {
 820         $callbackTag = strtolower($element->nodeName);
 821         $this->stack[] = $callbackTag;
 822
 823         $this->handleCallback($element, $callbackTag, $this->startTagCallbacks);
 824
 825         $this->parseElements($element);
 826         array_pop($this->stack);
 827
 828         $this->handleCallback($element, $callbackTag, $this->endTagCallbacks);
 829     }
 830
 831     protected function parseElements(DOMNode $element)
 832     {
 833         foreach ($element->childNodes as $child) {
 834             if ($child instanceof DOMText) {
 835                 $this->parseTextNode($child);
 836             } elseif ($child instanceof DOMElement) {
 837                 $this->parseElementNode($child);
 838             }
 839         }
 840     }
 841 }