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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) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: Extracted.php 18993 2009-11-15 17:09:16Z alexander $
*/
/** Zend_Pdf_Resource_Font */
require_once 'Zend/Pdf/Resource/Font.php';
/**
* Extracted fonts implementation
*
* Thes class allows to extract fonts already mentioned within PDF document and use them
* for text drawing.
*
* @package Zend_Pdf
* @subpackage Fonts
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Pdf_Resource_Font_Extracted extends Zend_Pdf_Resource_Font
{
/**
* Extracted font encoding
*
* Only 'Identity-H' and 'WinAnsiEncoding' encodings are supported now
*
* @var string
*/
protected $_encoding = null;
/**
* Object constructor
*
* $fontDictionary is a Zend_Pdf_Element_Reference or Zend_Pdf_Element_Object object
*
* @param mixed $fontDictionary
* @throws Zend_Pdf_Exception
*/
public function __construct($fontDictionary)
{
// Extract object factory and resource object from font dirctionary object
$this->_objectFactory = $fontDictionary->getFactory();
$this->_resource = $fontDictionary;
if ($fontDictionary->Encoding !== null) {
$this->_encoding = $fontDictionary->Encoding->value;
}
switch ($fontDictionary->Subtype->value) {
case 'Type0':
// Composite type 0 font
if (count($fontDictionary->DescendantFonts->items) != 1) {
// Multiple descendant fonts are not supported
require_once 'Zend/Pdf/Exception.php';
throw new Zend_Pdf_Exception('Unsupported font type.');
}
$fontDictionaryIterator = $fontDictionary->DescendantFonts->items->getIterator();
$fontDictionaryIterator->rewind();
$descendantFont = $fontDictionaryIterator->current();
$fontDescriptor = $descendantFont->FontDescriptor;
break;
case 'Type1':
if ($fontDictionary->FontDescriptor === null) {
// That's one of the standard fonts
$standardFont = Zend_Pdf_Font::fontWithName($fontDictionary->BaseFont->value);
$this->_fontNames = $standardFont->getFontNames();
$this->_isBold = $standardFont->isBold();
$this->_isItalic = $standardFont->isItalic();
$this->_isMonospace = $standardFont->isMonospace();
$this->_underlinePosition = $standardFont->getUnderlinePosition();
$this->_underlineThickness = $standardFont->getUnderlineThickness();
$this->_strikePosition = $standardFont->getStrikePosition();
$this->_strikeThickness = $standardFont->getStrikeThickness();
$this->_unitsPerEm = $standardFont->getUnitsPerEm();
$this->_ascent = $standardFont->getAscent();
$this->_descent = $standardFont->getDescent();
$this->_lineGap = $standardFont->getLineGap();
return;
}
$fontDescriptor = $fontDictionary->FontDescriptor;
break;
case 'TrueType':
$fontDescriptor = $fontDictionary->FontDescriptor;
break;
default:
require_once 'Zend/Pdf/Exception.php';
throw new Zend_Pdf_Exception('Unsupported font type.');
}
$this->_fontNames[Zend_Pdf_Font::NAME_POSTSCRIPT]['en'] = iconv('UTF-8', 'UTF-16BE', $fontDictionary->BaseFont->value);
$this->_isBold = false; // this property is actually not used anywhere
$this->_isItalic = ( ($fontDescriptor->Flags->value & (1 << 6)) != 0 ); // Bit-7 is set
$this->_isMonospace = ( ($fontDescriptor->Flags->value & (1 << 0)) != 0 ); // Bit-1 is set
$this->_underlinePosition = null; // Can't be extracted
$this->_underlineThickness = null; // Can't be extracted
$this->_strikePosition = null; // Can't be extracted
$this->_strikeThickness = null; // Can't be extracted
$this->_unitsPerEm = null; // Can't be extracted
$this->_ascent = $fontDescriptor->Ascent->value;
$this->_descent = $fontDescriptor->Descent->value;
$this->_lineGap = null; // Can't be extracted
}
/**
* 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)
{
require_once 'Zend/Pdf/Exception.php';
throw new Zend_Pdf_Exception('Operation is not supported for extracted fonts');
}
/**
* 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)
{
require_once 'Zend/Pdf/Exception.php';
throw new Zend_Pdf_Exception('Operation is not supported for extracted fonts');
}
/**
* Returns a number between 0 and 1 inclusive that indicates the percentage
* of characters in the string which are covered by glyphs in this font.
*
* Since no one font will contain glyphs for the entire Unicode character
* range, this method can be used to help locate a suitable font when the
* actual contents of the string are not known.
*
* Note that some fonts lie about the characters they support. Additionally,
* fonts don't usually contain glyphs for control characters such as tabs
* and line breaks, so it is rare that you will get back a full 1.0 score.
* The resulting value should be considered informational only.
*
* @param string $string
* @param string $charEncoding (optional) Character encoding of source text.
* If omitted, uses 'current locale'.
* @return float
*/
public function getCoveredPercentage($string, $charEncoding = '')
{
require_once 'Zend/Pdf/Exception.php';
throw new Zend_Pdf_Exception('Operation is not supported for extracted fonts');
}
/**
* Returns the widths of the glyphs.
*
* The widths are expressed in the font's glyph space. You are responsible
* for converting to user space as necessary. See {@link unitsPerEm()}.
*
* See also {@link widthForGlyph()}.
*
* @param array $glyphNumbers Array of glyph numbers.
* @return array Array of glyph widths (integers).
* @throws Zend_Pdf_Exception
*/
public function widthsForGlyphs($glyphNumbers)
{
require_once 'Zend/Pdf/Exception.php';
throw new Zend_Pdf_Exception('Operation is not supported for extracted fonts');
}
/**
* Returns the width of the glyph.
*
* Like {@link widthsForGlyphs()} but used for one glyph at a time.
*
* @param integer $glyphNumber
* @return integer
* @throws Zend_Pdf_Exception
*/
public function widthForGlyph($glyphNumber)
{
require_once 'Zend/Pdf/Exception.php';
throw new Zend_Pdf_Exception('Operation is not supported for extracted fonts');
}
/**
* Convert string to the font encoding.
*
* The method is used to prepare string for text drawing operators
*
* @param string $string
* @param string $charEncoding Character encoding of source text.
* @return string
*/
public function encodeString($string, $charEncoding)
{
if ($this->_encoding == 'Identity-H') {
return iconv($charEncoding, 'UTF-16BE', $string);
}
if ($this->_encoding == 'WinAnsiEncoding') {
return iconv($charEncoding, 'CP1252//IGNORE', $string);
}
require_once 'Zend/Pdf/Exception.php';
throw new Zend_Pdf_Exception('Fonf encoding is not supported');
}
/**
* Convert string from the font encoding.
*
* The method is used to convert strings retrieved from existing content streams
*
* @param string $string
* @param string $charEncoding Character encoding of resulting text.
* @return string
*/
public function decodeString($string, $charEncoding)
{
if ($this->_encoding == 'Identity-H') {
return iconv('UTF-16BE', $charEncoding, $string);
}
if ($this->_encoding == 'WinAnsiEncoding') {
return iconv('CP1252', $charEncoding, $string);
}
require_once 'Zend/Pdf/Exception.php';
throw new Zend_Pdf_Exception('Fonf encoding is not supported');
}
}
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