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/framework/vendor/zend/Zend/Pdf/Resource/Font/Extracted.php

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PHP | 274 lines | 113 code | 27 blank | 134 comment | 15 complexity | e0db97f6a1c3f25242ab70d0052208d3 MD5 | raw file
  1<?php
  2/**
  3 * Zend Framework
  4 *
  5 * LICENSE
  6 *
  7 * This source file is subject to the new BSD license that is bundled
  8 * with this package in the file LICENSE.txt.
  9 * It is also available through the world-wide-web at this URL:
 10 * http://framework.zend.com/license/new-bsd
 11 * If you did not receive a copy of the license and are unable to
 12 * obtain it through the world-wide-web, please send an email
 13 * to license@zend.com so we can send you a copy immediately.
 14 *
 15 * @category   Zend
 16 * @package    Zend_Pdf
 17 * @subpackage Fonts
 18 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
 19 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 20 * @version    $Id: Extracted.php 20893 2010-02-03 22:59:25Z yoshida@zend.co.jp $
 21 */
 22
 23
 24/** @see Zend_Pdf_Resource_Font */
 25require_once 'Zend/Pdf/Resource/Font.php';
 26
 27/**
 28 * Extracted fonts implementation
 29 *
 30 * Thes class allows to extract fonts already mentioned within PDF document and use them
 31 * for text drawing.
 32 *
 33 * @package    Zend_Pdf
 34 * @subpackage Fonts
 35 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
 36 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 37 */
 38class Zend_Pdf_Resource_Font_Extracted extends Zend_Pdf_Resource_Font
 39{
 40    /**
 41     * Messages
 42     */
 43    const TYPE_NOT_SUPPORTED = 'Unsupported font type.';
 44    const ENCODING_NOT_SUPPORTED  = 'Font encoding is not supported';
 45    const OPERATION_NOT_SUPPORTED = 'Operation is not supported for extracted fonts';
 46
 47    /**
 48     * Extracted font encoding
 49     *
 50     * Only 'Identity-H' and 'WinAnsiEncoding' encodings are supported now
 51     *
 52     * @var string
 53     */
 54    protected $_encoding = null;
 55
 56    /**
 57     * Object constructor
 58     *
 59     * $fontDictionary is a Zend_Pdf_Element_Reference or Zend_Pdf_Element_Object object
 60     *
 61     * @param mixed $fontDictionary
 62     * @throws Zend_Pdf_Exception
 63     */
 64    public function __construct($fontDictionary)
 65    {
 66        // Extract object factory and resource object from font dirctionary object
 67        $this->_objectFactory = $fontDictionary->getFactory();
 68        $this->_resource      = $fontDictionary;
 69
 70        if ($fontDictionary->Encoding !== null) {
 71            $this->_encoding = $fontDictionary->Encoding->value;
 72        }
 73
 74        switch ($fontDictionary->Subtype->value) {
 75            case 'Type0':
 76                // Composite type 0 font
 77                if (count($fontDictionary->DescendantFonts->items) != 1) {
 78                    // Multiple descendant fonts are not supported
 79                    require_once 'Zend/Pdf/Exception.php';
 80                    throw new Zend_Pdf_Exception(self::TYPE_NOT_SUPPORTED);
 81                }
 82
 83                $fontDictionaryIterator = $fontDictionary->DescendantFonts->items->getIterator();
 84                $fontDictionaryIterator->rewind();
 85                $descendantFont = $fontDictionaryIterator->current();
 86                $fontDescriptor = $descendantFont->FontDescriptor;
 87                break;
 88
 89            case 'Type1':
 90                if ($fontDictionary->FontDescriptor === null) {
 91                    // That's one of the standard fonts
 92                    $standardFont = Zend_Pdf_Font::fontWithName($fontDictionary->BaseFont->value);
 93
 94                    $this->_fontNames          = $standardFont->getFontNames();
 95                    $this->_isBold             = $standardFont->isBold();
 96                    $this->_isItalic           = $standardFont->isItalic();
 97                    $this->_isMonospace        = $standardFont->isMonospace();
 98                    $this->_underlinePosition  = $standardFont->getUnderlinePosition();
 99                    $this->_underlineThickness = $standardFont->getUnderlineThickness();
100                    $this->_strikePosition     = $standardFont->getStrikePosition();
101                    $this->_strikeThickness    = $standardFont->getStrikeThickness();
102                    $this->_unitsPerEm         = $standardFont->getUnitsPerEm();
103                    $this->_ascent             = $standardFont->getAscent();
104                    $this->_descent            = $standardFont->getDescent();
105                    $this->_lineGap            = $standardFont->getLineGap();
106
107                    return;
108                }
109
110                $fontDescriptor = $fontDictionary->FontDescriptor;
111                break;
112
113            case 'TrueType':
114                $fontDescriptor = $fontDictionary->FontDescriptor;
115                break;
116
117            default:
118                require_once 'Zend/Pdf/Exception.php';
119                throw new Zend_Pdf_Exception(self::TYPE_NOT_SUPPORTED);
120        }
121
122        $this->_fontNames[Zend_Pdf_Font::NAME_POSTSCRIPT]['en'] = iconv('UTF-8', 'UTF-16BE', $fontDictionary->BaseFont->value);
123
124        $this->_isBold             = false; // this property is actually not used anywhere
125        $this->_isItalic           = ( ($fontDescriptor->Flags->value & (1 << 6)) != 0 ); // Bit-7 is set
126        $this->_isMonospace        = ( ($fontDescriptor->Flags->value & (1 << 0)) != 0 ); // Bit-1 is set
127        $this->_underlinePosition  = null; // Can't be extracted
128        $this->_underlineThickness = null; // Can't be extracted
129        $this->_strikePosition     = null; // Can't be extracted
130        $this->_strikeThickness    = null; // Can't be extracted
131        $this->_unitsPerEm         = null; // Can't be extracted
132        $this->_ascent             = $fontDescriptor->Ascent->value;
133        $this->_descent            = $fontDescriptor->Descent->value;
134        $this->_lineGap            = null; // Can't be extracted
135    }
136
137    /**
138     * Returns an array of glyph numbers corresponding to the Unicode characters.
139     *
140     * If a particular character doesn't exist in this font, the special 'missing
141     * character glyph' will be substituted.
142     *
143     * See also {@link glyphNumberForCharacter()}.
144     *
145     * @param array $characterCodes Array of Unicode character codes (code points).
146     * @return array Array of glyph numbers.
147     */
148    public function glyphNumbersForCharacters($characterCodes)
149    {
150        require_once 'Zend/Pdf/Exception.php';
151        throw new Zend_Pdf_Exception(self::OPERATION_NOT_SUPPORTED);
152    }
153
154    /**
155     * Returns the glyph number corresponding to the Unicode character.
156     *
157     * If a particular character doesn't exist in this font, the special 'missing
158     * character glyph' will be substituted.
159     *
160     * See also {@link glyphNumbersForCharacters()} which is optimized for bulk
161     * operations.
162     *
163     * @param integer $characterCode Unicode character code (code point).
164     * @return integer Glyph number.
165     */
166    public function glyphNumberForCharacter($characterCode)
167    {
168        require_once 'Zend/Pdf/Exception.php';
169        throw new Zend_Pdf_Exception(self::OPERATION_NOT_SUPPORTED);
170    }
171
172    /**
173     * Returns a number between 0 and 1 inclusive that indicates the percentage
174     * of characters in the string which are covered by glyphs in this font.
175     *
176     * Since no one font will contain glyphs for the entire Unicode character
177     * range, this method can be used to help locate a suitable font when the
178     * actual contents of the string are not known.
179     *
180     * Note that some fonts lie about the characters they support. Additionally,
181     * fonts don't usually contain glyphs for control characters such as tabs
182     * and line breaks, so it is rare that you will get back a full 1.0 score.
183     * The resulting value should be considered informational only.
184     *
185     * @param string $string
186     * @param string $charEncoding (optional) Character encoding of source text.
187     *   If omitted, uses 'current locale'.
188     * @return float
189     */
190    public function getCoveredPercentage($string, $charEncoding = '')
191    {
192        require_once 'Zend/Pdf/Exception.php';
193        throw new Zend_Pdf_Exception(self::OPERATION_NOT_SUPPORTED);
194    }
195
196    /**
197     * Returns the widths of the glyphs.
198     *
199     * The widths are expressed in the font's glyph space. You are responsible
200     * for converting to user space as necessary. See {@link unitsPerEm()}.
201     *
202     * See also {@link widthForGlyph()}.
203     *
204     * @param array $glyphNumbers Array of glyph numbers.
205     * @return array Array of glyph widths (integers).
206     * @throws Zend_Pdf_Exception
207     */
208    public function widthsForGlyphs($glyphNumbers)
209    {
210        require_once 'Zend/Pdf/Exception.php';
211        throw new Zend_Pdf_Exception(self::OPERATION_NOT_SUPPORTED);
212    }
213
214    /**
215     * Returns the width of the glyph.
216     *
217     * Like {@link widthsForGlyphs()} but used for one glyph at a time.
218     *
219     * @param integer $glyphNumber
220     * @return integer
221     * @throws Zend_Pdf_Exception
222     */
223    public function widthForGlyph($glyphNumber)
224    {
225        require_once 'Zend/Pdf/Exception.php';
226        throw new Zend_Pdf_Exception(self::OPERATION_NOT_SUPPORTED);
227    }
228
229    /**
230     * Convert string to the font encoding.
231     *
232     * The method is used to prepare string for text drawing operators
233     *
234     * @param string $string
235     * @param string $charEncoding Character encoding of source text.
236     * @return string
237     */
238    public function encodeString($string, $charEncoding)
239    {
240        if ($this->_encoding == 'Identity-H') {
241            return iconv($charEncoding, 'UTF-16BE', $string);
242        }
243
244        if ($this->_encoding == 'WinAnsiEncoding') {
245            return iconv($charEncoding, 'CP1252//IGNORE', $string);
246        }
247
248        require_once 'Zend/Pdf/Exception.php';
249        throw new Zend_Pdf_Exception(self::ENCODING_NOT_SUPPORTED);
250    }
251
252    /**
253     * Convert string from the font encoding.
254     *
255     * The method is used to convert strings retrieved from existing content streams
256     *
257     * @param string $string
258     * @param string $charEncoding Character encoding of resulting text.
259     * @return string
260     */
261    public function decodeString($string, $charEncoding)
262    {
263        if ($this->_encoding == 'Identity-H') {
264            return iconv('UTF-16BE', $charEncoding, $string);
265        }
266
267        if ($this->_encoding == 'WinAnsiEncoding') {
268            return iconv('CP1252', $charEncoding, $string);
269        }
270
271        require_once 'Zend/Pdf/Exception.php';
272        throw new Zend_Pdf_Exception(self::ENCODING_NOT_SUPPORTED);
273    }
274}