website-2008-computer-shopping-3 /library/Zend/Pdf/Resource/Font/Simple.php

Language PHP Lines 276
MD5 Hash cab42b5cbbfa81954d1a687ac20d05a4 Estimated Cost $1,606 (why?)
Repository https://bitbucket.org/baruffaldi/website-2008-computer-shopping-3.git View Raw File View Project SPDX
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
<?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.
 *
 * @package    Zend_Pdf
 * @subpackage Fonts
 * @copyright  Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */

/** Zend_Pdf_Resource_Font */
require_once 'Zend/Pdf/Resource/Font.php';

/** Zend_Pdf_Cmap */
require_once 'Zend/Pdf/Cmap.php';



/**
 * Adobe PDF Simple fonts implementation
 * 
 * PDF simple fonts functionality is presented by Adobe Type 1 
 * (including standard PDF Type1 built-in fonts) and TrueType fonts support.
 *
 * Both fonts have the following properties:
 * - Glyphs in the font are selected by single-byte character codes obtained from a
 *   string that is shown by the text-showing operators. Logically, these codes index
 *   into a table of 256 glyphs; the mapping from codes to glyphs is called the font’s
 *   encoding.
 *   PDF specification provides a possibility to specify any user defined encoding in addition
 *   to the standard built-in encodings: Standard-Encoding, MacRomanEncoding, WinAnsiEncoding, 
 *   and PDFDocEncoding, but Zend_Pdf simple fonts implementation operates only with 
 *   Windows ANSI encoding (except Symbol and ZapfDingbats built-in fonts).
 *
 * - Each glyph has a single set of metrics, including a horizontal displacement or
 *   width. That is, simple fonts support only horizontal writing mode.
 *
 * 
 * The code in this class is common to both types. However, you will only deal
 * directly with subclasses.
 * 
 * Font objects should be normally be obtained from the factory methods
 * {@link Zend_Pdf_Font::fontWithName} and {@link Zend_Pdf_Font::fontWithPath}.
 *
 * @package    Zend_Pdf
 * @subpackage Fonts
 * @copyright  Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
abstract class Zend_Pdf_Resource_Font_Simple extends Zend_Pdf_Resource_Font
{
    /**
     * Object representing the font's cmap (character to glyph map).
     * @var Zend_Pdf_Cmap
     */
    protected $_cmap = null;

	/**
     * Array containing the widths of each of the glyphs contained in the font.
     *
     * Keys are integers starting from 0, which coresponds to Zend_Pdf_Cmap::MISSING_CHARACTER_GLYPH.
     *
     * Font character map may contain gaps for actually used glyphs, nevertheless glyphWidths array
     * contains widths for all glyphs even they are unused.
     *
     * @var array
     */
    protected $_glyphWidths = null;

    /**
     * Width for glyphs missed in the font
     * 
     * Note: Adobe PDF specfication (V1.4 - V1.6) doesn't define behavior for rendering
     * characters missed in the standard PDF fonts (such us 0x7F (DEL) Windows ANSI code)
     * Adobe Font Metrics files doesn't also define metrics for "missed glyph".
     * We provide character width as "0" for this case, but actually it depends on PDF viewer
     * implementation. 
     *
     * @var integer
     */
    protected $_missingGlyphWidth = 0;


	/**** Public Interface ****/


  /* Object Lifecycle */

    /**
     * Object constructor
     *
     */
    public function __construct()
    {
        parent::__construct();

        /**
         * @todo
         * It's easy to add other encodings support now (Standard-Encoding, MacRomanEncoding, 
         * PDFDocEncoding, MacExpertEncoding, Symbol, and ZapfDingbats).
         * Steps for the implementation:
         * - completely describe all PDF single byte encodings in the documentation
         * - implement non-WinAnsi encodings processing into encodeString()/decodeString() methods
         * 
         * These encodings will be automatically supported for standard builtin PDF fonts as well 
         * as for external fonts.
         */
        $this->_resource->Encoding = new Zend_Pdf_Element_Name('WinAnsiEncoding');
    }

    /**
     * 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)
    {
    	return $this->_cmap->glyphNumbersForCharacters($characterCodes);
    }

    /**
     * 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)
    {
        return $this->_cmap->glyphNumberForCharacter($characterCode);
    }

    /**
     * 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, $charEncoding = '')
    {
        /* Convert the string to UTF-16BE encoding so we can match the string's
         * character codes to those found in the cmap.
         */
        if ($charEncoding != 'UTF-16BE') {
            $string = iconv($charEncoding, 'UTF-16BE', $string);
        }

        $charCount = iconv_strlen($string, 'UTF-16BE');
        if ($charCount == 0) {
            return 0;
        }

        /* Fetch the covered character code list from the font's cmap.
         */
        $coveredCharacters = $this->_cmap->getCoveredCharacters();

        /* Calculate the score by doing a lookup for each character.
         */
        $score = 0;
        $maxIndex = strlen($string);
        for ($i = 0; $i < $maxIndex; $i++) {
            /**
             * @todo Properly handle characters encoded as surrogate pairs.
             */
            $charCode = (ord($string[$i]) << 8) | ord($string[++$i]);
            /* This could probably be optimized a bit with a binary search...
             */
            if (in_array($charCode, $coveredCharacters)) {
                $score++;
            }
        }
        return $score / $charCount;
    }

    /**
     * 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 &$glyphNumbers Array of glyph numbers.
     * @return array Array of glyph widths (integers).
     */
    public function widthsForGlyphs($glyphNumbers)
    {
        $widths = array();
        foreach ($glyphNumbers as $key => $glyphNumber) {
            if (!isset($this->_glyphWidths[$glyphNumber])) {
                $widths[$key] = $this->_missingGlyphWidth;
            } else {
                $widths[$key] = $this->_glyphWidths[$glyphNumber];
            }
        }
        return $widths;
    }

    /**
     * Returns the width of the glyph.
     *
     * Like {@link widthsForGlyphs()} but used for one glyph at a time.
     *
     * @param integer $glyphNumber
     * @return integer
     */
    public function widthForGlyph($glyphNumber)
    {
        if (!isset($this->_glyphWidths[$glyphNumber])) {
            return $this->_missingGlyphWidth;
        }
        return $this->_glyphWidths[$glyphNumber];
    }

    /**
     * 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, $charEncoding)
    {
        return iconv($charEncoding, 'CP1252//IGNORE', $string);
    }

    /**
     * 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)
    {
        return iconv('CP1252', $charEncoding, $string);
    }
}
Back to Top