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 <?php
 /**
  * Zend Framework
  *
  * LICENSE
  *
  * This source file is subject to the new BSD license that is bundled
  * with this package in the file LICENSE.txt.
  * It is also available through the world-wide-web at this URL:
  * http://framework.zend.com/license/new-bsd
  * If you did not receive a copy of the license and are unable to
  * obtain it through the world-wide-web, please send an email
  * to license@zend.com so we can send you a copy immediately.
  *
  * @category   Zend
  * @package    Zend_Pdf
  * @subpackage Fonts
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @version    $Id$
  */
 
 /** Zend_Pdf_Cmap */
 // require_once 'Zend/Pdf/Cmap.php';
 
 
 /**
  * Implements the "trimmed table mapping" character map (type 6).
  *
  * This table type is preferred over the {@link Zend_Pdf_Cmap_SegmentToDelta}
  * table when the Unicode characters covered by the font fall into a single
  * contiguous range.
  *
  * @package    Zend_Pdf
  * @subpackage Fonts
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 class Zend_Pdf_Cmap_TrimmedTable extends Zend_Pdf_Cmap
 {
   /**** Instance Variables ****/
 
 
     /**
      * The starting character code covered by this table.
      * @var integer
      */
     protected $_startCode = 0;
 
     /**
      * The ending character code covered by this table.
      * @var integer
      */
     protected $_endCode = 0;
 
     /**
      * Glyph index array. Stores the actual glyph numbers.
      * @var array
      */
     protected $_glyphIndexArray = array();
 
 
 
   /**** Public Interface ****/
 
 
   /* Concrete Class Implementation */
 
     /**
      * Returns an array of glyph numbers corresponding to the Unicode characters.
      *
      * If a particular character doesn't exist in this font, the special 'missing
      * character glyph' will be substituted.
      *
      * See also {@link glyphNumberForCharacter()}.
      *
      * @param array $characterCodes Array of Unicode character codes (code points).
      * @return array Array of glyph numbers.
      */
     public function glyphNumbersForCharacters($characterCodes)
     {
         $glyphNumbers = array();
         foreach ($characterCodes as $key => $characterCode) {
 
             if (($characterCode < $this->_startCode) || ($characterCode > $this->_endCode)) {
                 $glyphNumbers[$key] = Zend_Pdf_Cmap::MISSING_CHARACTER_GLYPH;
                 continue;
             }
 
             $glyphIndex = $characterCode - $this->_startCode;
             $glyphNumbers[$key] = $this->_glyphIndexArray[$glyphIndex];
 
         }
         return $glyphNumbers;
     }
 
     /**
      * Returns the glyph number corresponding to the Unicode character.
      *
      * If a particular character doesn't exist in this font, the special 'missing
      * character glyph' will be substituted.
      *
      * See also {@link glyphNumbersForCharacters()} which is optimized for bulk
      * operations.
      *
      * @param integer $characterCode Unicode character code (code point).
      * @return integer Glyph number.
      */
     public function glyphNumberForCharacter($characterCode)
     {
         if (($characterCode < $this->_startCode) || ($characterCode > $this->_endCode)) {
             return Zend_Pdf_Cmap::MISSING_CHARACTER_GLYPH;
         }
         $glyphIndex = $characterCode - $this->_startCode;
         return $this->_glyphIndexArray[$glyphIndex];
     }
 
     /**
      * Returns an array containing the Unicode characters that have entries in
      * this character map.
      *
      * @return array Unicode character codes.
      */
     public function getCoveredCharacters()
     {
         $characterCodes = array();
         for ($code = $this->_startCode; $code <= $this->_endCode; $code++) {
             $characterCodes[] = $code;
         }
         return $characterCodes;
     }
 
 
     /**
      * Returns an array containing the glyphs numbers that have entries in this character map.
      * Keys are Unicode character codes (integers)
      *
      * This functionality is partially covered by glyphNumbersForCharacters(getCoveredCharacters())
      * call, but this method do it in more effective way (prepare complete list instead of searching
      * glyph for each character code).
      *
      * @internal
      * @return array Array representing <Unicode character code> => <glyph number> pairs.
      */
     public function getCoveredCharactersGlyphs()
     {
         $glyphNumbers = array();
         for ($code = $this->_startCode; $code <= $this->_endCode; $code++) {
             $glyphNumbers[$code] = $this->_glyphIndexArray[$code - $this->_startCode];
         }
 
         return $glyphNumbers;
     }
 
 
   /* Object Lifecycle */
 
     /**
      * Object constructor
      *
      * Parses the raw binary table data. Throws an exception if the table is
      * malformed.
      *
      * @param string $cmapData Raw binary cmap table data.
      * @throws Zend_Pdf_Exception
      */
     public function __construct($cmapData)
     {
         /* Sanity check: The table should be at least 9 bytes in size.
          */
         $actualLength = strlen($cmapData);
         if ($actualLength < 9) {
             // require_once 'Zend/Pdf/Exception.php';
             throw new Zend_Pdf_Exception('Insufficient table data',
                                          Zend_Pdf_Exception::CMAP_TABLE_DATA_TOO_SMALL);
         }
 
         /* Sanity check: Make sure this is right data for this table type.
          */
         $type = $this->_extractUInt2($cmapData, 0);
         if ($type != Zend_Pdf_Cmap::TYPE_TRIMMED_TABLE) {
             // require_once 'Zend/Pdf/Exception.php';
             throw new Zend_Pdf_Exception('Wrong cmap table type',
                                          Zend_Pdf_Exception::CMAP_WRONG_TABLE_TYPE);
         }
 
         $length = $this->_extractUInt2($cmapData, 2);
         if ($length != $actualLength) {
             // require_once 'Zend/Pdf/Exception.php';
             throw new Zend_Pdf_Exception("Table length ($length) does not match actual length ($actualLength)",
                                          Zend_Pdf_Exception::CMAP_WRONG_TABLE_LENGTH);
         }
 
         /* Mapping tables should be language-independent. The font may not work
          * as expected if they are not. Unfortunately, many font files in the
          * wild incorrectly record a language ID in this field, so we can't
          * call this a failure.
          */
         $language = $this->_extractUInt2($cmapData, 4);
         if ($language != 0) {
             // Record a warning here somehow?
         }
 
         $this->_startCode = $this->_extractUInt2($cmapData, 6);
 
         $entryCount = $this->_extractUInt2($cmapData, 8);
         $expectedCount = ($length - 10) >> 1;
         if ($entryCount != $expectedCount) {
             // require_once 'Zend/Pdf/Exception.php';
             throw new Zend_Pdf_Exception("Entry count is wrong; expected: $expectedCount; actual: $entryCount",
                                          Zend_Pdf_Exception::CMAP_WRONG_ENTRY_COUNT);
         }
 
         $this->_endCode = $this->_startCode + $entryCount - 1;
 
         $offset = 10;
         for ($i = 0; $i < $entryCount; $i++, $offset += 2) {
             $this->_glyphIndexArray[] = $this->_extractUInt2($cmapData, $offset);
         }
 
         /* Sanity check: After reading all of the data, we should be at the end
          * of the table.
          */
         if ($offset != $length) {
             // require_once 'Zend/Pdf/Exception.php';
             throw new Zend_Pdf_Exception("Ending offset ($offset) does not match length ($length)",
                                          Zend_Pdf_Exception::CMAP_FINAL_OFFSET_NOT_LENGTH);
         }
     }
 
 }