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1 <?php
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2
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3 /*
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4 * This file is part of the Symfony package.
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5 *
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6 * (c) Fabien Potencier <fabien@symfony.com>
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7 *
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8 * For the full copyright and license information, please view the LICENSE
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9 * file that was distributed with this source code.
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10 */
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11
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12 namespace Symfony\Component\Console\Formatter;
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13
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14 use Symfony\Component\Console\Exception\InvalidArgumentException;
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15
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16 /**
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17 * @author Jean-François Simon <contact@jfsimon.fr>
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18 */
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19 class OutputFormatterStyleStack
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20 {
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21 /**
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22 * @var OutputFormatterStyleInterface[]
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23 */
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24 private $styles;
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25
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26 private $emptyStyle;
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27
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28 public function __construct(OutputFormatterStyleInterface $emptyStyle = null)
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29 {
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30 $this->emptyStyle = $emptyStyle ?: new OutputFormatterStyle();
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31 $this->reset();
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32 }
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33
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34 /**
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35 * Resets stack (ie. empty internal arrays).
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36 */
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37 public function reset()
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38 {
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39 $this->styles = [];
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40 }
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41
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42 /**
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43 * Pushes a style in the stack.
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44 */
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45 public function push(OutputFormatterStyleInterface $style)
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46 {
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47 $this->styles[] = $style;
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48 }
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49
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50 /**
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51 * Pops a style from the stack.
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52 *
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53 * @return OutputFormatterStyleInterface
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54 *
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55 * @throws InvalidArgumentException When style tags incorrectly nested
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56 */
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57 public function pop(OutputFormatterStyleInterface $style = null)
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58 {
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59 if (empty($this->styles)) {
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60 return $this->emptyStyle;
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61 }
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62
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63 if (null === $style) {
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64 return array_pop($this->styles);
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65 }
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66
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67 foreach (array_reverse($this->styles, true) as $index => $stackedStyle) {
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68 if ($style->apply('') === $stackedStyle->apply('')) {
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69 $this->styles = \array_slice($this->styles, 0, $index);
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70
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71 return $stackedStyle;
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72 }
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73 }
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74
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75 throw new InvalidArgumentException('Incorrectly nested style tag found.');
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76 }
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77
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78 /**
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79 * Computes current style with stacks top codes.
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80 *
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81 * @return OutputFormatterStyle
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82 */
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83 public function getCurrent()
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84 {
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85 if (empty($this->styles)) {
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86 return $this->emptyStyle;
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87 }
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88
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89 return $this->styles[\count($this->styles) - 1];
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90 }
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91
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92 /**
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93 * @return $this
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94 */
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95 public function setEmptyStyle(OutputFormatterStyleInterface $emptyStyle)
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96 {
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97 $this->emptyStyle = $emptyStyle;
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98
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99 return $this;
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100 }
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101
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102 /**
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103 * @return OutputFormatterStyleInterface
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104 */
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105 public function getEmptyStyle()
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106 {
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107 return $this->emptyStyle;
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108 }
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109 }
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