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<?php |
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namespace OneSheet\Size; |
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/** |
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* Class FontMeta to determine available ttf fonts for cell autosizing. |
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* |
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* @method string getCopyright() |
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* @method string getFontFamily() |
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* @method string getFontSubFamily() |
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* @method string getFontIdentifier() |
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* @method string getFontName() |
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* @method string getFontVersion() |
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* @method string getPostscriptName() |
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* @method string getTrademark() |
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* @method string getManufacturerName() |
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* @method string getDesigner() |
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* @method string getDescription() |
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* @method string getVendorUrl() |
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* @method string getDesignerUrl() |
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* @method string getLicenseDescription() |
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* @method string getLicenseUrl() |
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* @method string getReservedField() |
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* @method string getPreferredFamily() |
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* @method string getPreferredSubFamily() |
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* @method string getCompatibleFullName() |
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* @method string getPostscriptCid() |
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*/ |
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class FontMeta |
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{ |
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/** |
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* @var string |
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*/ |
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private $fileName; |
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/** |
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* @var array |
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*/ |
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private $data = array( |
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'copyright' => null, |
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'fontFamily' => null, |
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'fontSubFamily' => null, |
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'fontIdentifier' => null, |
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'fontName' => null, |
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'fontVersion' => null, |
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'postscriptName' => null, |
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'trademark' => null, |
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'manufacturerName' => null, |
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'designer' => null, |
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'description' => null, |
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'vendorUrl' => null, |
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'designerUrl' => null, |
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'licenseDescription' => null, |
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'licenseUrl' => null, |
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'reservedField' => null, |
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'preferredFamily' => null, |
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'preferredSubFamily' => null, |
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'compatibleFullName' => null, |
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'postscriptCid' => null, |
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); |
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/** |
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* FontMeta constructor. |
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* |
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* @param string $fileName |
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* @throws \Exception |
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*/ |
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function __construct($fileName) |
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{ |
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if (!$fileName || !is_readable($fileName)) { |
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throw new \Exception('File ' . $fileName . ' is not readable'); |
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} |
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$this->fileName = $fileName; |
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$this->readFontMetadata(); |
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} |
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/** |
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* @param string $name |
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* @param array $args |
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* @return mixed |
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*/ |
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public function __call($name, $args) |
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{ |
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$property = lcfirst(substr($name, 3)); |
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return isset($this->data[$property]) ? $this->data[$property] : null; |
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} |
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/** |
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* Read the font Metadata |
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* |
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* @throws \Exception |
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*/ |
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public function readFontMetadata() |
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{ |
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$fontHandle = fopen($this->fileName, "r"); |
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$offset = $this->getNameTableOffset($fontHandle); |
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fseek($fontHandle, $offset, SEEK_SET); |
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$nameTableHeader = fread($fontHandle, 6); |
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$numberOfRecords = $this->unpack(substr($nameTableHeader, 2, 2)); |
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$storageOffset = $this->unpack(substr($nameTableHeader, 4, 2)); |
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for ($a = 0; $a < $numberOfRecords; $a++) { |
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$this->findAndExtractCandidate($fontHandle, $offset, $storageOffset); |
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} |
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fclose($fontHandle); |
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} |
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/** |
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* @param resource $fontHandle |
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* |
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* @return int |
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* @throws \Exception |
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*/ |
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private function getNameTableOffset($fontHandle) |
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{ |
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$numberOfTables = $this->unpack(substr(fread($fontHandle, 12), 4, 2)); |
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for ($t = 0; $t < $numberOfTables; $t++) { |
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$tableDirectory = fread($fontHandle, 16); |
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$szTag = substr($tableDirectory, 0, 4); |
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if (strtolower($szTag) == 'name') { |
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return $this->unpack(substr($tableDirectory, 8, 4), 'N'); |
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} |
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} |
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fclose($fontHandle); |
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throw new \Exception('Can\'t find name table in ' . $this->fileName); |
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} |
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/** |
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* @param resource $fontHandle |
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* @param int $offset |
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* @param int $storageOffset |
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*/ |
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private function findAndExtractCandidate($fontHandle, $offset, $storageOffset) |
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{ |
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$nameRecord = fread($fontHandle, 12); |
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$nameId = $this->unpack(substr($nameRecord, 6, 2)); |
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$stringLength = $this->unpack(substr($nameRecord, 8, 2)); |
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$stringOffset = $this->unpack(substr($nameRecord, 10, 2)); |
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if ($stringLength > 0) { |
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$position = ftell($fontHandle); |
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fseek($fontHandle, $offset + $stringOffset + $storageOffset, SEEK_SET); |
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$testValue = fread($fontHandle, $stringLength); |
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$this->extractCandidate($nameId, $testValue); |
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fseek($fontHandle, $position, SEEK_SET); |
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} |
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} |
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/** |
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* Extract possible property/attribute. $data keys are |
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* intentionally sorted in order of the font file table. |
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* |
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* @param int $nameId |
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* @param string $testValue |
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*/ |
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private function extractCandidate($nameId, $testValue) |
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{ |
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$map = array_keys($this->data); |
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if (strlen(trim($testValue)) && array_key_exists($nameId, $map)) { |
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$this->data[$map[$nameId]] = $this->cleanupValue(trim($testValue)); |
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} |
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} |
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/** |
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* Remove ASCII ctrl characters |
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* |
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* @param string $value |
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* @return string |
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*/ |
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private function cleanupValue($value) |
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{ |
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return preg_replace('/[[:cntrl:]]/', '', trim($value)); |
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} |
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/** |
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* Convert big endian unsigned short[n] or long[N] value to an integer. |
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* |
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* @param string $value |
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* @param string $format |
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* @return int |
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*/ |
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private function unpack($value, $format = 'n') |
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{ |
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$unpacked = unpack($format, $value); |
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return (int)array_pop($unpacked); |
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} |
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} |
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nimmneun /
onesheet
Adding explicit visibility (
private,protected, orpublic) is generally recommend to communicate to other developers how, and from where this method is intended to be used.