[6779] | 1 | <?php
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| 2 | /**
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| 3 | * DOMPDF - PHP5 HTML to PDF renderer
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| 4 | *
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| 5 | * File: $RCSfile: font_metrics.cls.php,v $
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| 6 | * Created on: 2004-06-02
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| 7 | *
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| 8 | * Copyright (c) 2004 - Benj Carson <benjcarson@digitaljunkies.ca>
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| 9 | *
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| 10 | * This library is free software; you can redistribute it and/or
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| 11 | * modify it under the terms of the GNU Lesser General Public
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| 12 | * License as published by the Free Software Foundation; either
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| 13 | * version 2.1 of the License, or (at your option) any later version.
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| 14 | *
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| 15 | * This library is distributed in the hope that it will be useful,
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| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 18 | * Lesser General Public License for more details.
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| 19 | *
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| 20 | * You should have received a copy of the GNU Lesser General Public License
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| 21 | * along with this library in the file LICENSE.LGPL; if not, write to the
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| 22 | * Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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| 23 | * 02111-1307 USA
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| 24 | *
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| 25 | * Alternatively, you may distribute this software under the terms of the
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| 26 | * PHP License, version 3.0 or later. A copy of this license should have
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| 27 | * been distributed with this file in the file LICENSE.PHP . If this is not
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| 28 | * the case, you can obtain a copy at http://www.php.net/license/3_0.txt.
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| 29 | *
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| 30 | * The latest version of DOMPDF might be available at:
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| 31 | * http://www.digitaljunkies.ca/dompdf
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| 32 | *
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| 33 | * @link http://www.digitaljunkies.ca/dompdf
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| 34 | * @copyright 2004 Benj Carson
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| 35 | * @author Benj Carson <benjcarson@digitaljunkies.ca>
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| 36 | * @contributor Helmut Tischer <htischer@weihenstephan.org>
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| 37 | * @package dompdf
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| 38 | * @version 0.5.1
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| 39 | *
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| 40 | * Changes
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| 41 | * @contributor Helmut Tischer <htischer@weihenstephan.org>
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| 42 | * @version 0.5.1.htischer.20090507
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| 43 | * - On missing font on explicite font selection don't change subtype and don't return default font.
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| 44 | * - On requesting default font and missing subtype, check similar subtypes, then any subtype, then normal. The last must exist.
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| 45 | * - Add comments
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| 46 | */
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| 47 |
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| 48 | /* $Id: font_metrics.cls.php 186 2009-10-19 22:42:06Z eclecticgeek@gmail.com $ */
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| 49 |
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| 50 | require_once(DOMPDF_LIB_DIR . "/class.pdf.php");
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| 51 |
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| 52 | /**
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| 53 | * Name of the font cache file
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| 54 | *
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| 55 | * This file must be writable by the webserver process only to update it
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| 56 | * with save_font_families() after adding the .afm file references of a new font family
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| 57 | * with Font_Metrics::save_font_families().
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| 58 | * This is typically done only from command line with load_font.php on converting
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| 59 | * ttf fonts to afm with an external tool referenced in the define _TTF2AFM
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| 60 | *
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| 61 | * Declared here because PHP5 prevents constants from being declared with expressions
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| 62 | */
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| 63 | if (file_exists(DOMPDF_FONT_DIR . "dompdf_font_family_cache")) {
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| 64 | define('__DOMPDF_FONT_CACHE_FILE', DOMPDF_FONT_DIR . "dompdf_font_family_cache");
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| 65 | } else {
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| 66 | define('__DOMPDF_FONT_CACHE_FILE', DOMPDF_FONT_DIR . "dompdf_font_family_cache.dist");
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| 67 | }
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| 68 |
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| 69 |
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| 70 | /**
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| 71 | * The font metrics class
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| 72 | *
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| 73 | * This class provides information about fonts and text. It can resolve
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| 74 | * font names into actual installed font files, as well as determine the
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| 75 | * size of text in a particular font and size.
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| 76 | *
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| 77 | * @static
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| 78 | * @package dompdf
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| 79 | */
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| 80 | class Font_Metrics {
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| 81 |
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| 82 | /**
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| 83 | * @see __DOMPDF_FONT_CACHE_FILE
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| 84 | */
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| 85 | const CACHE_FILE = __DOMPDF_FONT_CACHE_FILE;
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| 86 |
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| 87 | /**
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| 88 | * Underlying {@link Cpdf} object to perform text size calculations
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| 89 | *
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| 90 | * @var Cpdf
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| 91 | */
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| 92 | static protected $_pdf = null;
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| 93 |
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| 94 | /**
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| 95 | * Array of font family names to font files
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| 96 | *
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| 97 | * Usually cached by the {@link load_font.php} script
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| 98 | *
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| 99 | * @var array
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| 100 | */
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| 101 | static protected $_font_lookup = array();
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| 102 |
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| 103 |
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| 104 | /**
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| 105 | * Class initialization
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| 106 | *
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| 107 | */
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| 108 | static function init() {
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| 109 | if (!self::$_pdf) {
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| 110 | self::load_font_families();
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| 111 | self::$_pdf = Canvas_Factory::get_instance();
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| 112 | }
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| 113 | }
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| 114 |
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| 115 | /**
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| 116 | * Calculates text size, in points
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| 117 | *
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| 118 | * @param string $text the text to be sized
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| 119 | * @param string $font the desired font
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| 120 | * @param float $size the desired font size
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| 121 | * @param float $spacing word spacing, if any
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| 122 | * @return float
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| 123 | */
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| 124 | static function get_text_width($text, $font, $size, $spacing = 0) {
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| 125 | return self::$_pdf->get_text_width($text, $font, $size, $spacing);
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| 126 | }
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| 127 |
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| 128 | /**
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| 129 | * Calculates font height
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| 130 | *
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| 131 | * @param string $font
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| 132 | * @param float $size
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| 133 | * @return float
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| 134 | */
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| 135 | static function get_font_height($font, $size) {
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| 136 | return self::$_pdf->get_font_height($font, $size);
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| 137 | }
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| 138 |
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| 139 | /**
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| 140 | * Resolves a font family & subtype into an actual font file
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| 141 | *
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| 142 | * Subtype can be one of 'normal', 'bold', 'italic' or 'bold_italic'. If
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| 143 | * the particular font family has no suitable font file, the default font
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| 144 | * ({@link DOMPDF_DEFAULT_FONT}) is used. The font file returned
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| 145 | * is the absolute pathname to the font file on the system.
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| 146 | *
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| 147 | * @param string $family
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| 148 | * @param string $subtype
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| 149 | * @return string
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| 150 | */
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| 151 | static function get_font($family, $subtype = "normal") {
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| 152 |
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| 153 | /* Allow calling for various fonts in search path. Therefore not immediately
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| 154 | * return replacement on non match.
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| 155 | * Only when called with NULL try replacement.
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| 156 | * When this is also missing there is really trouble.
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| 157 | * If only the subtype fails, nevertheless return failure.
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| 158 | * Only on checking the fallback font, check various subtypes on same font.
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| 159 | */
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| 160 |
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| 161 | if ( $family ) {
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| 162 | $family = str_replace( array("'", '"'), "", mb_strtolower($family));
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| 163 | $subtype = mb_strtolower($subtype);
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| 164 |
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| 165 | if ( isset(self::$_font_lookup[$family][$subtype]) ) {
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| 166 | return self::$_font_lookup[$family][$subtype];
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| 167 | }
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| 168 | return null;
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| 169 | }
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| 170 |
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| 171 | $family = DOMPDF_DEFAULT_FONT;
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| 172 |
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| 173 | if ( isset(self::$_font_lookup[$family][$subtype]) ) {
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| 174 | return self::$_font_lookup[$family][$subtype];
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| 175 | }
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| 176 |
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| 177 | foreach ( self::$_font_lookup[$family] as $sub => $font ) {
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| 178 | if (strpos($subtype, $sub) !== false) {
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| 179 | return $font;
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| 180 | }
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| 181 | }
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| 182 |
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| 183 | if ($subtype != "normal") {
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| 184 | foreach ( self::$_font_lookup[$family] as $sub => $font ) {
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| 185 | if ($sub != "normal") {
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| 186 | return $font;
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| 187 | }
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| 188 | }
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| 189 | }
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| 190 |
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| 191 | $subtype = "normal";
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| 192 |
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| 193 | if ( isset(self::$_font_lookup[$family][$subtype]) ) {
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| 194 | return self::$_font_lookup[$family][$subtype];
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| 195 | }
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| 196 | return null;
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| 197 | }
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| 198 |
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| 199 | /**
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| 200 | * Saves the stored font family cache
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| 201 | *
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| 202 | * The name and location of the cache file are determined by {@link
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| 203 | * Font_Metrics::CACHE_FILE}. This file should be writable by the
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| 204 | * webserver process.
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| 205 | *
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| 206 | * @see Font_Metrics::load_font_families()
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| 207 | */
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| 208 | static function save_font_families() {
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| 209 |
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| 210 | file_put_contents(self::CACHE_FILE, var_export(self::$_font_lookup, true));
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| 211 |
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| 212 | }
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| 213 |
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| 214 | /**
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| 215 | * Loads the stored font family cache
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| 216 | *
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| 217 | * @see save_font_families()
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| 218 | */
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| 219 | static function load_font_families() {
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| 220 | if ( !is_readable(self::CACHE_FILE) )
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| 221 | return;
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| 222 |
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| 223 | $data = file_get_contents(self::CACHE_FILE);
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| 224 |
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| 225 | if ( $data != "" )
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| 226 | eval ('self::$_font_lookup = ' . $data . ";");
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| 227 | }
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| 228 |
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| 229 | /**
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| 230 | * Returns the current font lookup table
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| 231 | *
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| 232 | * @return array
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| 233 | */
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| 234 | static function get_font_families() {
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| 235 | return self::$_font_lookup;
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| 236 | }
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| 237 |
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| 238 | static function set_font_family($fontname, $entry) {
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| 239 | self::$_font_lookup[mb_strtolower($fontname)] = $entry;
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| 240 | }
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| 241 | }
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| 242 |
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| 243 | Font_Metrics::init();
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| 244 |
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| 245 | ?> |
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