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<?php |
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namespace Spatie\CodeOutline; |
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class Renderer |
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{ |
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/** @var array */ |
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protected $lines; |
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public function __construct(array $lines) |
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{ |
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$this->lines = $lines; |
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} |
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public function getRendered(): string |
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{ |
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$lines = $this->renderLines(); |
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return str_replace('{{ outline }}', $lines, file_get_contents(__DIR__.'/index.twig')); |
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} |
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protected function renderLines() |
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{ |
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$rendered = []; |
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$maximumCharacterPositionDensity = $this->getMaximumCharacterPositionDensity($this->lines); |
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foreach ($this->lines as $lineNumber => $line) { |
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$lineNumber = str_pad($lineNumber, 3, '0', STR_PAD_LEFT); |
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$rendered[] = $this->renderLine($line, $maximumCharacterPositionDensity, $lineNumber); |
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} |
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return implode(PHP_EOL, $rendered); |
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} |
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protected function renderLine(?array $line, int $maximumCharacterPositionDensity, string $lineNumber): string |
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{ |
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if (!$line) { |
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return "<div>{$lineNumber}: </div>"; |
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} |
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$renderedLine = array_map(function ($characterValue) use ($maximumCharacterPositionDensity) { |
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$class = 'code'; |
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if ($characterValue < 0) { |
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$class .= ' indent'; |
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} |
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$color = $this->getColor($characterValue, $maximumCharacterPositionDensity); |
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return "<span class=\"{$class}\" style=\"background-color:{$color}\"> </span>"; |
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}, $line); |
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return "<div>{$lineNumber}: ".implode('', $renderedLine).'</div>'; |
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} |
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protected function getMaximumCharacterPositionDensity(array $lines): int |
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{ |
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$maximumDensityForLine = []; |
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foreach ($lines as $line) { |
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if (!$line) { |
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continue; |
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} |
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$maximumDensityForLine[] = max($line); |
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} |
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return max($maximumDensityForLine); |
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} |
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protected function getColor(int $value, int $max): string |
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{ |
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$modifier = 1 - ($value / $max); |
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$gray = (245 * $modifier); |
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return $this->getRgbHex($gray, $gray, $gray); |
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} |
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protected function getRgbHex(int $red, int $green, int $blue) |
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{ |
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$colors = array_map(function ($color) { |
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return str_pad(dechex($color), 2, '0', STR_PAD_LEFT); |
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}, [$red, $green, $blue]); |
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return '#'.implode('', $colors); |
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} |
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} |
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spatie /
code-outliner
