Complex classes like Style often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use Style, and based on these observations, apply Extract Interface, too.
| 1 | <?php  | 
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| 11 | class Style  | 
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| 12 | { | 
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| 13 | /** Default font values */  | 
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| 14 | const DEFAULT_FONT_SIZE = 11;  | 
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| 15 | const DEFAULT_FONT_COLOR = Color::BLACK;  | 
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| 16 | const DEFAULT_FONT_NAME = 'Arial';  | 
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| 17 | |||
| 18 | /** @var int|null Style ID */  | 
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| 19 | protected $id = null;  | 
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| 20 | |||
| 21 | /** @var bool Whether the font should be bold */  | 
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| 22 | protected $fontBold = false;  | 
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| 23 | /** @var bool Whether the bold property was set */  | 
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| 24 | protected $hasSetFontBold = false;  | 
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| 25 | |||
| 26 | /** @var bool Whether the font should be italic */  | 
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| 27 | protected $fontItalic = false;  | 
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| 28 | /** @var bool Whether the italic property was set */  | 
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| 29 | protected $hasSetFontItalic = false;  | 
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| 30 | |||
| 31 | /** @var bool Whether the font should be underlined */  | 
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| 32 | protected $fontUnderline = false;  | 
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| 33 | /** @var bool Whether the underline property was set */  | 
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| 34 | protected $hasSetFontUnderline = false;  | 
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| 35 | |||
| 36 | /** @var bool Whether the font should be struck through */  | 
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| 37 | protected $fontStrikethrough = false;  | 
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| 38 | /** @var bool Whether the strikethrough property was set */  | 
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| 39 | protected $hasSetFontStrikethrough = false;  | 
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| 40 | |||
| 41 | /** @var int Font size */  | 
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| 42 | protected $fontSize = self::DEFAULT_FONT_SIZE;  | 
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| 43 | /** @var bool Whether the font size property was set */  | 
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| 44 | protected $hasSetFontSize = false;  | 
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| 45 | |||
| 46 | /** @var string Font color */  | 
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| 47 | protected $fontColor = self::DEFAULT_FONT_COLOR;  | 
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| 48 | /** @var bool Whether the font color property was set */  | 
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| 49 | protected $hasSetFontColor = false;  | 
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| 50 | |||
| 51 | /** @var string Font name */  | 
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| 52 | protected $fontName = self::DEFAULT_FONT_NAME;  | 
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| 53 | /** @var bool Whether the font name property was set */  | 
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| 54 | protected $hasSetFontName = false;  | 
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| 55 | |||
| 56 | /** @var bool Whether specific font properties should be applied */  | 
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| 57 | protected $shouldApplyFont = false;  | 
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| 58 | |||
| 59 | /** @var bool Whether the text should wrap in the cell (useful for long or multi-lines text) */  | 
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| 60 | protected $shouldWrapText = false;  | 
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| 61 | /** @var bool Whether the wrap text property was set */  | 
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| 62 | protected $hasSetWrapText = false;  | 
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| 63 | |||
| 64 | /**  | 
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| 65 | * @var Border  | 
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| 66 | */  | 
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| 67 | protected $border = null;  | 
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| 68 | |||
| 69 | /**  | 
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| 70 | * @var bool Whether border properties should be applied  | 
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| 71 | */  | 
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| 72 | protected $shouldApplyBorder = false;  | 
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| 73 | |||
| 74 | /** @var string Background color */  | 
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| 75 | protected $backgroundColor = null;  | 
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| 76 | |||
| 77 | /** @var bool */  | 
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| 78 | protected $hasSetBackgroundColor = false;  | 
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| 79 | |||
| 80 | |||
| 81 | /**  | 
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| 82 | * @return int|null  | 
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| 83 | */  | 
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| 84 | 237 | public function getId()  | 
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| 88 | |||
| 89 | /**  | 
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| 90 | * @param int $id  | 
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| 91 | * @return Style  | 
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| 92 | */  | 
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| 93 | 279 | public function setId($id)  | 
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| 98 | |||
| 99 | /**  | 
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| 100 | * @return Border  | 
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| 101 | */  | 
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| 102 | 96 | public function getBorder()  | 
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| 106 | |||
| 107 | /**  | 
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| 108 | * @param Border $border  | 
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| 109 | * @return Style  | 
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| 110 | */  | 
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| 111 | 24 | public function setBorder(Border $border)  | 
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| 117 | |||
| 118 | /**  | 
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| 119 | * @return bool  | 
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| 120 | */  | 
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| 121 | 270 | public function shouldApplyBorder()  | 
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| 125 | |||
| 126 | /**  | 
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| 127 | * @return bool  | 
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| 128 | */  | 
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| 129 | 159 | public function isFontBold()  | 
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| 133 | |||
| 134 | /**  | 
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| 135 | * @return Style  | 
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| 136 | */  | 
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| 137 | 48 | public function setFontBold()  | 
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| 144 | |||
| 145 | /**  | 
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| 146 | * @return bool  | 
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| 147 | */  | 
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| 148 | 159 | public function isFontItalic()  | 
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| 152 | |||
| 153 | /**  | 
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| 154 | * @return Style  | 
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| 155 | */  | 
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| 156 | 12 | public function setFontItalic()  | 
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| 163 | |||
| 164 | /**  | 
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| 165 | * @return bool  | 
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| 166 | */  | 
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| 167 | 159 | public function isFontUnderline()  | 
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| 171 | |||
| 172 | /**  | 
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| 173 | * @return Style  | 
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| 174 | */  | 
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| 175 | 18 | public function setFontUnderline()  | 
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| 182 | |||
| 183 | /**  | 
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| 184 | * @return bool  | 
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| 185 | */  | 
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| 186 | 159 | public function isFontStrikethrough()  | 
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| 190 | |||
| 191 | /**  | 
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| 192 | * @return Style  | 
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| 193 | */  | 
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| 194 | 12 | public function setFontStrikethrough()  | 
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| 201 | |||
| 202 | /**  | 
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| 203 | * @return int  | 
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| 204 | */  | 
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| 205 | 222 | public function getFontSize()  | 
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| 209 | |||
| 210 | /**  | 
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| 211 | * @param int $fontSize Font size, in pixels  | 
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| 212 | * @return Style  | 
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| 213 | */  | 
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| 214 | 159 | public function setFontSize($fontSize)  | 
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| 221 | |||
| 222 | /**  | 
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| 223 | * @return string  | 
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| 224 | */  | 
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| 225 | 222 | public function getFontColor()  | 
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| 229 | |||
| 230 | /**  | 
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| 231 | * Sets the font color.  | 
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| 232 | *  | 
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| 233 | * @param string $fontColor ARGB color (@see Color)  | 
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| 234 | * @return Style  | 
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| 235 | */  | 
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| 236 | 6 | public function setFontColor($fontColor)  | 
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| 243 | |||
| 244 | /**  | 
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| 245 | * @return string  | 
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| 246 | */  | 
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| 247 | 261 | public function getFontName()  | 
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| 251 | |||
| 252 | /**  | 
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| 253 | * @param string $fontName Name of the font to use  | 
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| 254 | * @return Style  | 
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| 255 | */  | 
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| 256 | 150 | public function setFontName($fontName)  | 
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| 263 | |||
| 264 | /**  | 
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| 265 | * @return bool  | 
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| 266 | */  | 
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| 267 | 234 | public function shouldWrapText()  | 
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| 271 | |||
| 272 | /**  | 
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| 273 | * @param bool|void $shouldWrap Should the text be wrapped  | 
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| 274 | * @return Style  | 
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| 275 | */  | 
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| 276 | 30 | public function setShouldWrapText($shouldWrap = true)  | 
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| 282 | |||
| 283 | /**  | 
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| 284 | * @return bool  | 
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| 285 | */  | 
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| 286 | 186 | public function hasSetWrapText()  | 
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| 290 | |||
| 291 | /**  | 
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| 292 | * @return bool Whether specific font properties should be applied  | 
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| 293 | */  | 
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| 294 | 186 | public function shouldApplyFont()  | 
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| 298 | |||
| 299 | /**  | 
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| 300 | * Sets the background color  | 
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| 301 | * @param string $color ARGB color (@see Color)  | 
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| 302 | * @return Style  | 
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| 303 | */  | 
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| 304 | 18 | public function setBackgroundColor($color)  | 
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| 310 | |||
| 311 | /**  | 
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| 312 | * @return string  | 
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| 313 | */  | 
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| 314 | 147 | public function getBackgroundColor()  | 
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| 318 | |||
| 319 | /**  | 
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| 320 | *  | 
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| 321 | * @return bool Whether the background color should be applied  | 
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| 322 | */  | 
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| 323 | 153 | public function shouldApplyBackgroundColor()  | 
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| 327 | |||
| 328 | /**  | 
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| 329 | * Serializes the style for future comparison with other styles.  | 
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| 330 | * The ID is excluded from the comparison, as we only care about  | 
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| 331 | * actual style properties.  | 
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| 332 | *  | 
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| 333 | * @return string The serialized style  | 
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| 334 | */  | 
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| 335 | 279 | public function serialize()  | 
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| 347 | |||
| 348 | /**  | 
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| 349 | * Merges the current style with the given style, using the given style as a base. This means that:  | 
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| 350 | * - if current style and base style both have property A set, use current style property's value  | 
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| 351 | * - if current style has property A set but base style does not, use current style property's value  | 
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| 352 | * - if base style has property A set but current style does not, use base style property's value  | 
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| 353 | *  | 
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| 354 | * @NOTE: This function returns a new style.  | 
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| 355 | *  | 
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| 356 | * @param Style $baseStyle  | 
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| 357 | * @return Style New style corresponding to the merge of the 2 styles  | 
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| 358 | */  | 
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| 359 | 93 | public function mergeWith($baseStyle)  | 
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| 369 | |||
| 370 | /**  | 
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| 371 | * @param Style $styleToUpdate (passed as reference)  | 
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| 372 | * @param Style $baseStyle  | 
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| 373 | * @return void  | 
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| 374 | */  | 
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| 375 | 93 | private function mergeFontStyles($styleToUpdate, $baseStyle)  | 
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| 390 | |||
| 391 | /**  | 
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| 392 | * @param Style $styleToUpdate Style to update (passed as reference)  | 
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| 393 | * @param Style $baseStyle  | 
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| 394 | * @return void  | 
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| 395 | */  | 
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| 396 | 93 | private function mergeOtherFontProperties($styleToUpdate, $baseStyle)  | 
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| 408 | |||
| 409 | /**  | 
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| 410 | * @param Style $styleToUpdate Style to update (passed as reference)  | 
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| 411 | * @param Style $baseStyle  | 
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| 412 | * @return void  | 
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| 413 | */  | 
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| 414 | 93 | private function mergeCellProperties($styleToUpdate, $baseStyle)  | 
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| 426 | }  | 
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| 427 |