263 lines
9.6 KiB
PHP
263 lines
9.6 KiB
PHP
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<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_Pdf
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* @subpackage Fonts
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* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id: Extracted.php 17530 2009-08-10 18:47:29Z alexander $
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*/
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/** Zend_Pdf_Resource_Font */
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require_once 'Zend/Pdf/Resource/Font.php';
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/** Zend_Pdf_Cmap */
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require_once 'Zend/Pdf/Cmap.php';
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/**
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* Extracted fonts implementation
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*
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* Thes class allows to extract fonts already mentioned within PDF document and use them
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* for text drawing.
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*
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* @package Zend_Pdf
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* @subpackage Fonts
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* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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class Zend_Pdf_Resource_Font_Extracted extends Zend_Pdf_Resource_Font
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{
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/**
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* Extracted font encoding
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*
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* Only 'Identity-H' and 'WinAnsiEncoding' encodings are supported now
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*
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* @var string
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*/
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protected $_encoding = null;
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/**
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* Object constructor
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*
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* $fontDictionary is a Zend_Pdf_Element_Reference or Zend_Pdf_Element_Object object
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*
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* @param mixed $fontDictionary
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* @throws Zend_Pdf_Exception
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*/
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public function __construct($fontDictionary)
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{
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// Extract object factory and resource object from font dirctionary object
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$this->_objectFactory = $fontDictionary->getFactory();
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$this->_resource = $fontDictionary;
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if ($fontDictionary->Encoding !== null) {
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$this->_encoding = $fontDictionary->Encoding->value;
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}
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switch ($fontDictionary->Subtype->value) {
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case 'Type0':
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// Composite type 0 font
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if (count($fontDictionary->DescendantFonts->items) != 1) {
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// Multiple descendant fonts are not supported
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throw new Zend_Pdf_Exception('Unsupported font type.');
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}
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$fontDictionaryIterator = $fontDictionary->DescendantFonts->items->getIterator();
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$fontDictionaryIterator->rewind();
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$descendantFont = $fontDictionaryIterator->current();
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$fontDescriptor = $descendantFont->FontDescriptor;
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break;
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case 'Type1':
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if ($fontDictionary->FontDescriptor === null) {
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// That's one of the standard fonts
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$standardFont = Zend_Pdf_Font::fontWithName($fontDictionary->BaseFont->value);
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$this->_fontNames = $standardFont->getFontNames();
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$this->_isBold = $standardFont->isBold();
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$this->_isItalic = $standardFont->isItalic();
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$this->_isMonospace = $standardFont->isMonospace();
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$this->_underlinePosition = $standardFont->getUnderlinePosition();
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$this->_underlineThickness = $standardFont->getUnderlineThickness();
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$this->_strikePosition = $standardFont->getStrikePosition();
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$this->_strikeThickness = $standardFont->getStrikeThickness();
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$this->_unitsPerEm = $standardFont->getUnitsPerEm();
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$this->_ascent = $standardFont->getAscent();
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$this->_descent = $standardFont->getDescent();
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$this->_lineGap = $standardFont->getLineGap();
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return;
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}
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$fontDescriptor = $fontDictionary->FontDescriptor;
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break;
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case 'TrueType':
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$fontDescriptor = $fontDictionary->FontDescriptor;
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break;
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default:
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throw new Zend_Pdf_Exception('Unsupported font type.');
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}
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$this->_fontNames[Zend_Pdf_Font::NAME_POSTSCRIPT]['en'] = iconv('UTF-8', 'UTF-16BE', $fontDictionary->BaseFont->value);
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$this->_isBold = false; // this property is actually not used anywhere
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$this->_isItalic = ( ($fontDescriptor->Flags->value & (1 << 6)) != 0 ); // Bit-7 is set
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$this->_isMonospace = ( ($fontDescriptor->Flags->value & (1 << 0)) != 0 ); // Bit-1 is set
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$this->_underlinePosition = null; // Can't be extracted
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$this->_underlineThickness = null; // Can't be extracted
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$this->_strikePosition = null; // Can't be extracted
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$this->_strikeThickness = null; // Can't be extracted
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$this->_unitsPerEm = null; // Can't be extracted
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$this->_ascent = $fontDescriptor->Ascent->value;
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$this->_descent = $fontDescriptor->Descent->value;
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$this->_lineGap = null; // Can't be extracted
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}
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/**
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* Returns an array of glyph numbers corresponding to the Unicode characters.
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*
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* If a particular character doesn't exist in this font, the special 'missing
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* character glyph' will be substituted.
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*
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* See also {@link glyphNumberForCharacter()}.
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*
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* @param array $characterCodes Array of Unicode character codes (code points).
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* @return array Array of glyph numbers.
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*/
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public function glyphNumbersForCharacters($characterCodes)
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{
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throw new Zend_Pdf_Exception('Operation is not supported for extracted fonts');
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}
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/**
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* Returns the glyph number corresponding to the Unicode character.
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*
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* If a particular character doesn't exist in this font, the special 'missing
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* character glyph' will be substituted.
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*
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* See also {@link glyphNumbersForCharacters()} which is optimized for bulk
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* operations.
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*
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* @param integer $characterCode Unicode character code (code point).
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* @return integer Glyph number.
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*/
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public function glyphNumberForCharacter($characterCode)
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{
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throw new Zend_Pdf_Exception('Operation is not supported for extracted fonts');
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}
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/**
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* Returns a number between 0 and 1 inclusive that indicates the percentage
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* of characters in the string which are covered by glyphs in this font.
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*
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* Since no one font will contain glyphs for the entire Unicode character
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* range, this method can be used to help locate a suitable font when the
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* actual contents of the string are not known.
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*
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* Note that some fonts lie about the characters they support. Additionally,
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* fonts don't usually contain glyphs for control characters such as tabs
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* and line breaks, so it is rare that you will get back a full 1.0 score.
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* The resulting value should be considered informational only.
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*
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* @param string $string
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* @param string $charEncoding (optional) Character encoding of source text.
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* If omitted, uses 'current locale'.
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* @return float
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*/
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public function getCoveredPercentage($string, $charEncoding = '')
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{
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throw new Zend_Pdf_Exception('Operation is not supported for extracted fonts');
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}
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/**
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* Returns the widths of the glyphs.
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*
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* The widths are expressed in the font's glyph space. You are responsible
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* for converting to user space as necessary. See {@link unitsPerEm()}.
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*
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* See also {@link widthForGlyph()}.
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*
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* @param array $glyphNumbers Array of glyph numbers.
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* @return array Array of glyph widths (integers).
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* @throws Zend_Pdf_Exception
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*/
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public function widthsForGlyphs($glyphNumbers)
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{
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throw new Zend_Pdf_Exception('Operation is not supported for extracted fonts');
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}
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/**
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* Returns the width of the glyph.
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*
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* Like {@link widthsForGlyphs()} but used for one glyph at a time.
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*
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* @param integer $glyphNumber
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* @return integer
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* @throws Zend_Pdf_Exception
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*/
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public function widthForGlyph($glyphNumber)
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{
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throw new Zend_Pdf_Exception('Operation is not supported for extracted fonts');
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}
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/**
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* Convert string to the font encoding.
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*
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* The method is used to prepare string for text drawing operators
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*
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* @param string $string
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* @param string $charEncoding Character encoding of source text.
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* @return string
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*/
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public function encodeString($string, $charEncoding)
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{
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if ($this->_encoding == 'Identity-H') {
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return iconv($charEncoding, 'UTF-16BE', $string);
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}
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if ($this->_encoding == 'WinAnsiEncoding') {
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return iconv($charEncoding, 'CP1252//IGNORE', $string);
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}
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throw new Zend_Pdf_Exception('Fonf encoding is not supported');
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}
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/**
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* Convert string from the font encoding.
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*
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* The method is used to convert strings retrieved from existing content streams
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*
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* @param string $string
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* @param string $charEncoding Character encoding of resulting text.
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* @return string
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*/
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public function decodeString($string, $charEncoding)
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{
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if ($this->_encoding == 'Identity-H') {
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return iconv('UTF-16BE', $charEncoding, $string);
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}
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if ($this->_encoding == 'WinAnsiEncoding') {
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return iconv('CP1252', $charEncoding, $string);
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}
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throw new Zend_Pdf_Exception('Fonf encoding is not supported');
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}
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}
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