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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Phpdftk\Pdf\Writer; |
| 6 | |
| 7 | /** |
| 8 | * Document-wide styling defaults for the high-level {@see Pdf} builder. |
| 9 | * |
| 10 | * Holds the page margins, body-text defaults (font, size, color, line |
| 11 | * height, paragraph spacing) and per-level heading styles (H1–H6). |
| 12 | * Individual {@see Pdf::addText()} calls can override parts of the |
| 13 | * theme via {@see TextStyle}; headings inherit from the theme's |
| 14 | * heading map. |
| 15 | * |
| 16 | * Themes are immutable. Use the `with*` helpers to derive a modified |
| 17 | * theme without mutating the original. |
| 18 | */ |
| 19 | final class Theme |
| 20 | { |
| 21 | /** |
| 22 | * @param float $margin uniform page margin (points) |
| 23 | * @param string $family body font family (Helvetica / Times / Courier) |
| 24 | * @param float $fontSize body size |
| 25 | * @param array{float,float,float} $color body RGB (0–1) |
| 26 | * @param float $lineHeight multiplier of font size |
| 27 | * @param float $paragraphSpacing gap between paragraphs (points) |
| 28 | * @param array<int, array{size: float, bold: bool, spaceAbove: float, spaceBelow: float}> $headings |
| 29 | * map from level (1..6) to heading style |
| 30 | */ |
| 31 | public function __construct( |
| 32 | public readonly float $margin = 72.0, |
| 33 | public readonly string $family = 'Helvetica', |
| 34 | public readonly float $fontSize = 11.0, |
| 35 | public readonly array $color = [0.0, 0.0, 0.0], |
| 36 | public readonly float $lineHeight = 1.2, |
| 37 | public readonly float $paragraphSpacing = 6.0, |
| 38 | public readonly array $headings = [ |
| 39 | 1 => ['size' => 24.0, 'bold' => true, 'spaceAbove' => 18.0, 'spaceBelow' => 10.0], |
| 40 | 2 => ['size' => 20.0, 'bold' => true, 'spaceAbove' => 14.0, 'spaceBelow' => 8.0], |
| 41 | 3 => ['size' => 16.0, 'bold' => true, 'spaceAbove' => 12.0, 'spaceBelow' => 6.0], |
| 42 | 4 => ['size' => 14.0, 'bold' => true, 'spaceAbove' => 10.0, 'spaceBelow' => 5.0], |
| 43 | 5 => ['size' => 12.0, 'bold' => true, 'spaceAbove' => 8.0, 'spaceBelow' => 4.0], |
| 44 | 6 => ['size' => 11.0, 'bold' => true, 'spaceAbove' => 6.0, 'spaceBelow' => 3.0], |
| 45 | ], |
| 46 | public readonly float $headerHeight = 0.0, |
| 47 | public readonly float $footerHeight = 0.0, |
| 48 | public readonly float $quoteIndent = 18.0, |
| 49 | public readonly float $quoteBarWidth = 2.0, |
| 50 | /** @var array{float,float,float} */ |
| 51 | public readonly array $quoteBarColor = [0.7, 0.7, 0.7], |
| 52 | ) {} |
| 53 | |
| 54 | public function withFont(string $family, float $size): self |
| 55 | { |
| 56 | return new self( |
| 57 | margin: $this->margin, |
| 58 | family: $family, |
| 59 | fontSize: $size, |
| 60 | color: $this->color, |
| 61 | lineHeight: $this->lineHeight, |
| 62 | paragraphSpacing: $this->paragraphSpacing, |
| 63 | headings: $this->headings, |
| 64 | headerHeight: $this->headerHeight, |
| 65 | footerHeight: $this->footerHeight, |
| 66 | quoteIndent: $this->quoteIndent, |
| 67 | quoteBarWidth: $this->quoteBarWidth, |
| 68 | quoteBarColor: $this->quoteBarColor, |
| 69 | ); |
| 70 | } |
| 71 | |
| 72 | /** @param array{float,float,float} $color */ |
| 73 | public function withColor(array $color): self |
| 74 | { |
| 75 | return new self( |
| 76 | margin: $this->margin, |
| 77 | family: $this->family, |
| 78 | fontSize: $this->fontSize, |
| 79 | color: $color, |
| 80 | lineHeight: $this->lineHeight, |
| 81 | paragraphSpacing: $this->paragraphSpacing, |
| 82 | headings: $this->headings, |
| 83 | headerHeight: $this->headerHeight, |
| 84 | footerHeight: $this->footerHeight, |
| 85 | quoteIndent: $this->quoteIndent, |
| 86 | quoteBarWidth: $this->quoteBarWidth, |
| 87 | quoteBarColor: $this->quoteBarColor, |
| 88 | ); |
| 89 | } |
| 90 | |
| 91 | public function withMargin(float $margin): self |
| 92 | { |
| 93 | return new self( |
| 94 | margin: $margin, |
| 95 | family: $this->family, |
| 96 | fontSize: $this->fontSize, |
| 97 | color: $this->color, |
| 98 | lineHeight: $this->lineHeight, |
| 99 | paragraphSpacing: $this->paragraphSpacing, |
| 100 | headings: $this->headings, |
| 101 | headerHeight: $this->headerHeight, |
| 102 | footerHeight: $this->footerHeight, |
| 103 | quoteIndent: $this->quoteIndent, |
| 104 | quoteBarWidth: $this->quoteBarWidth, |
| 105 | quoteBarColor: $this->quoteBarColor, |
| 106 | ); |
| 107 | } |
| 108 | |
| 109 | /** |
| 110 | * @return array{size: float, bold: bool, spaceAbove: float, spaceBelow: float} |
| 111 | */ |
| 112 | public function heading(int $level): array |
| 113 | { |
| 114 | if (!isset($this->headings[$level])) { |
| 115 | throw new \InvalidArgumentException("No heading style for level $level (expected 1–6)"); |
| 116 | } |
| 117 | return $this->headings[$level]; |
| 118 | } |
| 119 | } |