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<?php |
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namespace OneSheet\Size; |
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/** |
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* Class SizeCalculator to calculate the approximate width |
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* of cells based on the current font, size and content. |
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*/ |
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class SizeCalculator |
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{ |
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/** |
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* @var array |
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*/ |
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private $fonts = array(); |
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/** |
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* @var array |
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*/ |
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private $sizes = array(); |
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/** |
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* @param string|null $fontsDirectory |
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* @throws \Exception |
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*/ |
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public function __construct($fontsDirectory = null) |
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{ |
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if (is_dir($fontsDirectory)) { |
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$this->findFonts($fontsDirectory); |
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} |
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} |
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/** |
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* Find fonts/paths in a given directory recursively. |
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* |
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* @param string|null $path |
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* @return string|null |
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* @throws \Exception |
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*/ |
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public function findFonts($path = null) |
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{ |
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foreach (glob($path . DIRECTORY_SEPARATOR . '*') as $path) { |
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if (is_dir($path)) { |
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$path = $this->findFonts($path); |
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} elseif (preg_match('~(.+\..tf)$~i', $path, $m)) { |
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$meta = new FontMeta($path); |
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if (strlen($meta->getFontName())) { |
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$this->fonts[$meta->getFontName()] = $path; |
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} |
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} |
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} |
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return $path; |
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} |
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/** |
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* Return array of available font names and paths. |
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* |
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* @return array |
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*/ |
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public function getFonts() |
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{ |
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return $this->fonts; |
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} |
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/** |
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* Get the calculated cell width for a given value. |
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* |
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* @param string $fontName |
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* @param int $fontSize |
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* @param mixed $value |
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* |
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* @return float|int |
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*/ |
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public function getCellWidth($fontName, $fontSize, $value) |
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{ |
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$width = 1; |
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foreach ($this->getSingleCharacterArray($value) as $char) { |
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$width += $this->getCharacterWidth($fontName, $fontSize, $char); |
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} |
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return $width; |
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} |
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/** |
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* Get width of a single character. Calculate & cache if necessary. |
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* |
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* @param string $fontName |
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* @param int $fontSize |
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* @param string $char |
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* |
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* @return float |
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*/ |
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private function getCharacterWidth($fontName, $fontSize, $char) |
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{ |
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if (!isset($this->sizes[$fontName][$fontSize][$char])) { |
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$this->sizes[$fontName][$fontSize][$char] = |
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$this->calculateCharacterWidth($fontName, $fontSize, $char); |
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} |
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return $this->sizes[$fontName][$fontSize][$char]; |
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} |
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/** |
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* Calculate the width of a single character for the given fontname and size. |
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* Create image that contains the character 100 times to get more accurate results. |
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* |
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* @param string $fontName |
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* @param int $fontSize |
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* @param string $char |
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* |
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* @return float |
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*/ |
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private function calculateCharacterWidth($fontName, $fontSize, $char) |
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{ |
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if (isset($this->fonts[$fontName])) { |
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$box = imageftbbox($fontSize, 0, $this->fonts[$fontName], str_repeat($char, 100)); |
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$width = abs($box[4] - $box[0]) / 6.73 / 100; |
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return round($width, 3); |
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} |
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return 0.1 * $fontSize; |
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} |
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/** |
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* Split value into individual characters. |
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* |
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* @param mixed $value |
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* @return array |
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*/ |
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private function getSingleCharacterArray($value) |
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{ |
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if (mb_strlen($value) == strlen($value)) { |
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return str_split($value); |
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} |
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return preg_split('~~u', $value, -1, PREG_SPLIT_NO_EMPTY); |
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} |
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} |
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nimmneun /
onesheet
